[PATCH v2 1/4] WIP: Use permanent FunctionCallInfo in printtup

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[PATCH v2 1/4] WIP: Use permanent FunctionCallInfo in printtup
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* [PATCH v2 1/4] WIP: Use permanent FunctionCallInfo in printtup
@ 2026-05-06 15:41 Andres Freund <andres@anarazel.de>
  0 siblings, 0 replies; 440+ messages in thread

From: Andres Freund @ 2026-05-06 15:41 UTC (permalink / raw)

Should probably be done similarly for COPY
---
 src/backend/access/common/printtup.c | 15 +++++++++++++--
 1 file changed, 13 insertions(+), 2 deletions(-)

diff --git a/src/backend/access/common/printtup.c b/src/backend/access/common/printtup.c
index 616bdafd395..6fa93a6798a 100644
--- a/src/backend/access/common/printtup.c
+++ b/src/backend/access/common/printtup.c
@@ -50,6 +50,8 @@ typedef struct
 	bool		typisvarlena;	/* is it varlena (ie possibly toastable)? */
 	int16		format;			/* format code for this column */
 	FmgrInfo	finfo;			/* Precomputed call info for output fn */
+	/* XXX: Would probably be faster to allocate "inline" */
+	FunctionCallInfo outstate;	/* Prepared FCI for slightly faster calls */
 } PrinttupAttrInfo;
 
 typedef struct
@@ -291,6 +293,10 @@ printtup_prepare_info(DR_printtup *myState, TupleDesc typeinfo, int numAttrs)
 			ereport(ERROR,
 					(errcode(ERRCODE_INVALID_PARAMETER_VALUE),
 					 errmsg("unsupported format code: %d", format)));
+
+		/* both out and send funcs have one argument */
+		thisState->outstate = palloc0(SizeForFunctionCallInfo(1));
+		thisState->outstate->flinfo = &thisState->finfo;
 	}
 }
 
@@ -353,12 +359,16 @@ printtup(TupleTableSlot *slot, DestReceiver *self)
 			VALGRIND_CHECK_MEM_IS_DEFINED(DatumGetPointer(attr),
 										  VARSIZE_ANY(DatumGetPointer(attr)));
 
+		/* fill in argument for output / send function */
+		thisState->outstate->args[0].value = attr;
+
 		if (thisState->format == 0)
 		{
 			/* Text output */
 			char	   *outputstr;
 
-			outputstr = OutputFunctionCall(&thisState->finfo, attr);
+			outputstr = DatumGetCString(FunctionCallInvoke(thisState->outstate));
+			Assert(!thisState->outstate->isnull);
 			pq_sendcountedtext(buf, outputstr, strlen(outputstr));
 		}
 		else
@@ -366,7 +376,8 @@ printtup(TupleTableSlot *slot, DestReceiver *self)
 			/* Binary output */
 			bytea	   *outputbytes;
 
-			outputbytes = SendFunctionCall(&thisState->finfo, attr);
+			outputbytes = DatumGetByteaP(FunctionCallInvoke(thisState->outstate));
+			Assert(!thisState->outstate->isnull);
 			pq_sendint32(buf, VARSIZE(outputbytes) - VARHDRSZ);
 			pq_sendbytes(buf, VARDATA(outputbytes),
 						 VARSIZE(outputbytes) - VARHDRSZ);
-- 
2.43.0


--=-=-=
Content-Type: text/x-diff
Content-Disposition: attachment;
 filename=v2-0002-Mega-WIP-Optimized-out-send-path-for-printtup.patch



^ permalink  raw  reply  [nested|flat] 440+ messages in thread

* [PATCH v1 2/8] convert ParallelBitmapHeapState->state to an atomic
@ 2026-07-09 18:38 Nathan Bossart <nathan@postgresql.org>
  0 siblings, 0 replies; 440+ messages in thread

From: Nathan Bossart @ 2026-07-09 18:38 UTC (permalink / raw)

---
 src/backend/executor/nodeBitmapHeapscan.c | 21 ++++++---------------
 1 file changed, 6 insertions(+), 15 deletions(-)

diff --git a/src/backend/executor/nodeBitmapHeapscan.c b/src/backend/executor/nodeBitmapHeapscan.c
index 83d6478bc2b..f2bb487bf10 100644
--- a/src/backend/executor/nodeBitmapHeapscan.c
+++ b/src/backend/executor/nodeBitmapHeapscan.c
@@ -79,7 +79,6 @@ typedef enum
 /* ----------------
  *	 ParallelBitmapHeapState information
  *		tbmiterator				iterator for scanning current pages
- *		mutex					mutual exclusion for state
  *		state					current state of the TIDBitmap
  *		cv						conditional wait variable
  * ----------------
@@ -87,8 +86,7 @@ typedef enum
 typedef struct ParallelBitmapHeapState
 {
 	dsa_pointer tbmiterator;
-	slock_t		mutex;
-	SharedBitmapState state;
+	pg_atomic_uint32 state;
 	ConditionVariable cv;
 } ParallelBitmapHeapState;
 
@@ -228,9 +226,7 @@ BitmapHeapNext(BitmapHeapScanState *node)
 static inline void
 BitmapDoneInitializingSharedState(ParallelBitmapHeapState *pstate)
 {
-	SpinLockAcquire(&pstate->mutex);
-	pstate->state = BM_FINISHED;
-	SpinLockRelease(&pstate->mutex);
+	pg_atomic_write_membarrier_u32(&pstate->state, BM_FINISHED);
 	ConditionVariableBroadcast(&pstate->cv);
 }
 
@@ -480,11 +476,8 @@ BitmapShouldInitializeSharedState(ParallelBitmapHeapState *pstate)
 
 	while (1)
 	{
-		SpinLockAcquire(&pstate->mutex);
-		state = pstate->state;
-		if (pstate->state == BM_INITIAL)
-			pstate->state = BM_INPROGRESS;
-		SpinLockRelease(&pstate->mutex);
+		state = BM_INITIAL;
+		pg_atomic_compare_exchange_u32(&pstate->state, &state, BM_INPROGRESS);
 
 		/* Exit if bitmap is done, or if we're the leader. */
 		if (state != BM_INPROGRESS)
@@ -538,9 +531,7 @@ ExecBitmapHeapInitializeDSM(BitmapHeapScanState *node,
 
 	pstate->tbmiterator = 0;
 
-	/* Initialize the mutex */
-	SpinLockInit(&pstate->mutex);
-	pstate->state = BM_INITIAL;
+	pg_atomic_init_u32(&pstate->state, BM_INITIAL);
 
 	ConditionVariableInit(&pstate->cv);
 
@@ -565,7 +556,7 @@ ExecBitmapHeapReInitializeDSM(BitmapHeapScanState *node,
 	if (dsa == NULL)
 		return;
 
-	pstate->state = BM_INITIAL;
+	pg_atomic_write_u32(&pstate->state, BM_INITIAL);
 
 	if (DsaPointerIsValid(pstate->tbmiterator))
 		tbm_free_shared_area(dsa, pstate->tbmiterator);
-- 
2.50.1 (Apple Git-155)


--Ot5x3ffkWEuxilWO
Content-Type: text/plain; charset=us-ascii
Content-Disposition: attachment;
	filename=v1-0003-convert-FixedParallelState-last_xlog_end-to-an-at.patch



^ permalink  raw  reply  [nested|flat] 440+ messages in thread

* [PATCH v1 2/8] convert ParallelBitmapHeapState->state to an atomic
@ 2026-07-09 18:38 Nathan Bossart <nathan@postgresql.org>
  0 siblings, 0 replies; 440+ messages in thread

From: Nathan Bossart @ 2026-07-09 18:38 UTC (permalink / raw)

---
 src/backend/executor/nodeBitmapHeapscan.c | 21 ++++++---------------
 1 file changed, 6 insertions(+), 15 deletions(-)

diff --git a/src/backend/executor/nodeBitmapHeapscan.c b/src/backend/executor/nodeBitmapHeapscan.c
index 83d6478bc2b..f2bb487bf10 100644
--- a/src/backend/executor/nodeBitmapHeapscan.c
+++ b/src/backend/executor/nodeBitmapHeapscan.c
@@ -79,7 +79,6 @@ typedef enum
 /* ----------------
  *	 ParallelBitmapHeapState information
  *		tbmiterator				iterator for scanning current pages
- *		mutex					mutual exclusion for state
  *		state					current state of the TIDBitmap
  *		cv						conditional wait variable
  * ----------------
@@ -87,8 +86,7 @@ typedef enum
 typedef struct ParallelBitmapHeapState
 {
 	dsa_pointer tbmiterator;
-	slock_t		mutex;
-	SharedBitmapState state;
+	pg_atomic_uint32 state;
 	ConditionVariable cv;
 } ParallelBitmapHeapState;
 
@@ -228,9 +226,7 @@ BitmapHeapNext(BitmapHeapScanState *node)
 static inline void
 BitmapDoneInitializingSharedState(ParallelBitmapHeapState *pstate)
 {
-	SpinLockAcquire(&pstate->mutex);
-	pstate->state = BM_FINISHED;
-	SpinLockRelease(&pstate->mutex);
+	pg_atomic_write_membarrier_u32(&pstate->state, BM_FINISHED);
 	ConditionVariableBroadcast(&pstate->cv);
 }
 
@@ -480,11 +476,8 @@ BitmapShouldInitializeSharedState(ParallelBitmapHeapState *pstate)
 
 	while (1)
 	{
-		SpinLockAcquire(&pstate->mutex);
-		state = pstate->state;
-		if (pstate->state == BM_INITIAL)
-			pstate->state = BM_INPROGRESS;
-		SpinLockRelease(&pstate->mutex);
+		state = BM_INITIAL;
+		pg_atomic_compare_exchange_u32(&pstate->state, &state, BM_INPROGRESS);
 
 		/* Exit if bitmap is done, or if we're the leader. */
 		if (state != BM_INPROGRESS)
@@ -538,9 +531,7 @@ ExecBitmapHeapInitializeDSM(BitmapHeapScanState *node,
 
 	pstate->tbmiterator = 0;
 
-	/* Initialize the mutex */
-	SpinLockInit(&pstate->mutex);
-	pstate->state = BM_INITIAL;
+	pg_atomic_init_u32(&pstate->state, BM_INITIAL);
 
 	ConditionVariableInit(&pstate->cv);
 
@@ -565,7 +556,7 @@ ExecBitmapHeapReInitializeDSM(BitmapHeapScanState *node,
 	if (dsa == NULL)
 		return;
 
-	pstate->state = BM_INITIAL;
+	pg_atomic_write_u32(&pstate->state, BM_INITIAL);
 
 	if (DsaPointerIsValid(pstate->tbmiterator))
 		tbm_free_shared_area(dsa, pstate->tbmiterator);
-- 
2.50.1 (Apple Git-155)


--Ot5x3ffkWEuxilWO
Content-Type: text/plain; charset=us-ascii
Content-Disposition: attachment;
	filename=v1-0003-convert-FixedParallelState-last_xlog_end-to-an-at.patch



^ permalink  raw  reply  [nested|flat] 440+ messages in thread

* [PATCH v1 2/8] convert ParallelBitmapHeapState->state to an atomic
@ 2026-07-09 18:38 Nathan Bossart <nathan@postgresql.org>
  0 siblings, 0 replies; 440+ messages in thread

From: Nathan Bossart @ 2026-07-09 18:38 UTC (permalink / raw)

---
 src/backend/executor/nodeBitmapHeapscan.c | 21 ++++++---------------
 1 file changed, 6 insertions(+), 15 deletions(-)

diff --git a/src/backend/executor/nodeBitmapHeapscan.c b/src/backend/executor/nodeBitmapHeapscan.c
index 83d6478bc2b..f2bb487bf10 100644
--- a/src/backend/executor/nodeBitmapHeapscan.c
+++ b/src/backend/executor/nodeBitmapHeapscan.c
@@ -79,7 +79,6 @@ typedef enum
 /* ----------------
  *	 ParallelBitmapHeapState information
  *		tbmiterator				iterator for scanning current pages
- *		mutex					mutual exclusion for state
  *		state					current state of the TIDBitmap
  *		cv						conditional wait variable
  * ----------------
@@ -87,8 +86,7 @@ typedef enum
 typedef struct ParallelBitmapHeapState
 {
 	dsa_pointer tbmiterator;
-	slock_t		mutex;
-	SharedBitmapState state;
+	pg_atomic_uint32 state;
 	ConditionVariable cv;
 } ParallelBitmapHeapState;
 
@@ -228,9 +226,7 @@ BitmapHeapNext(BitmapHeapScanState *node)
 static inline void
 BitmapDoneInitializingSharedState(ParallelBitmapHeapState *pstate)
 {
-	SpinLockAcquire(&pstate->mutex);
-	pstate->state = BM_FINISHED;
-	SpinLockRelease(&pstate->mutex);
+	pg_atomic_write_membarrier_u32(&pstate->state, BM_FINISHED);
 	ConditionVariableBroadcast(&pstate->cv);
 }
 
@@ -480,11 +476,8 @@ BitmapShouldInitializeSharedState(ParallelBitmapHeapState *pstate)
 
 	while (1)
 	{
-		SpinLockAcquire(&pstate->mutex);
-		state = pstate->state;
-		if (pstate->state == BM_INITIAL)
-			pstate->state = BM_INPROGRESS;
-		SpinLockRelease(&pstate->mutex);
+		state = BM_INITIAL;
+		pg_atomic_compare_exchange_u32(&pstate->state, &state, BM_INPROGRESS);
 
 		/* Exit if bitmap is done, or if we're the leader. */
 		if (state != BM_INPROGRESS)
@@ -538,9 +531,7 @@ ExecBitmapHeapInitializeDSM(BitmapHeapScanState *node,
 
 	pstate->tbmiterator = 0;
 
-	/* Initialize the mutex */
-	SpinLockInit(&pstate->mutex);
-	pstate->state = BM_INITIAL;
+	pg_atomic_init_u32(&pstate->state, BM_INITIAL);
 
 	ConditionVariableInit(&pstate->cv);
 
@@ -565,7 +556,7 @@ ExecBitmapHeapReInitializeDSM(BitmapHeapScanState *node,
 	if (dsa == NULL)
 		return;
 
-	pstate->state = BM_INITIAL;
+	pg_atomic_write_u32(&pstate->state, BM_INITIAL);
 
 	if (DsaPointerIsValid(pstate->tbmiterator))
 		tbm_free_shared_area(dsa, pstate->tbmiterator);
-- 
2.50.1 (Apple Git-155)


--Ot5x3ffkWEuxilWO
Content-Type: text/plain; charset=us-ascii
Content-Disposition: attachment;
	filename=v1-0003-convert-FixedParallelState-last_xlog_end-to-an-at.patch



^ permalink  raw  reply  [nested|flat] 440+ messages in thread

* [PATCH v2 2/9] convert ParallelBitmapHeapState->state to an atomic
@ 2026-07-09 18:38 Nathan Bossart <nathan@postgresql.org>
  0 siblings, 0 replies; 440+ messages in thread

From: Nathan Bossart @ 2026-07-09 18:38 UTC (permalink / raw)

---
 src/backend/executor/nodeBitmapHeapscan.c | 23 +++++++----------------
 1 file changed, 7 insertions(+), 16 deletions(-)

diff --git a/src/backend/executor/nodeBitmapHeapscan.c b/src/backend/executor/nodeBitmapHeapscan.c
index 83d6478bc2b..a9e83f30687 100644
--- a/src/backend/executor/nodeBitmapHeapscan.c
+++ b/src/backend/executor/nodeBitmapHeapscan.c
@@ -79,7 +79,6 @@ typedef enum
 /* ----------------
  *	 ParallelBitmapHeapState information
  *		tbmiterator				iterator for scanning current pages
- *		mutex					mutual exclusion for state
  *		state					current state of the TIDBitmap
  *		cv						conditional wait variable
  * ----------------
@@ -87,8 +86,7 @@ typedef enum
 typedef struct ParallelBitmapHeapState
 {
 	dsa_pointer tbmiterator;
-	slock_t		mutex;
-	SharedBitmapState state;
+	pg_atomic_uint32 state;
 	ConditionVariable cv;
 } ParallelBitmapHeapState;
 
@@ -228,9 +226,7 @@ BitmapHeapNext(BitmapHeapScanState *node)
 static inline void
 BitmapDoneInitializingSharedState(ParallelBitmapHeapState *pstate)
 {
-	SpinLockAcquire(&pstate->mutex);
-	pstate->state = BM_FINISHED;
-	SpinLockRelease(&pstate->mutex);
+	pg_atomic_write_membarrier_u32(&pstate->state, BM_FINISHED);
 	ConditionVariableBroadcast(&pstate->cv);
 }
 
@@ -476,15 +472,12 @@ ExecInitBitmapHeapScan(BitmapHeapScan *node, EState *estate, int eflags)
 static bool
 BitmapShouldInitializeSharedState(ParallelBitmapHeapState *pstate)
 {
-	SharedBitmapState state;
+	uint32		state;
 
 	while (1)
 	{
-		SpinLockAcquire(&pstate->mutex);
-		state = pstate->state;
-		if (pstate->state == BM_INITIAL)
-			pstate->state = BM_INPROGRESS;
-		SpinLockRelease(&pstate->mutex);
+		state = BM_INITIAL;
+		pg_atomic_compare_exchange_u32(&pstate->state, &state, BM_INPROGRESS);
 
 		/* Exit if bitmap is done, or if we're the leader. */
 		if (state != BM_INPROGRESS)
@@ -538,9 +531,7 @@ ExecBitmapHeapInitializeDSM(BitmapHeapScanState *node,
 
 	pstate->tbmiterator = 0;
 
-	/* Initialize the mutex */
-	SpinLockInit(&pstate->mutex);
-	pstate->state = BM_INITIAL;
+	pg_atomic_init_u32(&pstate->state, BM_INITIAL);
 
 	ConditionVariableInit(&pstate->cv);
 
@@ -565,7 +556,7 @@ ExecBitmapHeapReInitializeDSM(BitmapHeapScanState *node,
 	if (dsa == NULL)
 		return;
 
-	pstate->state = BM_INITIAL;
+	pg_atomic_write_u32(&pstate->state, BM_INITIAL);
 
 	if (DsaPointerIsValid(pstate->tbmiterator))
 		tbm_free_shared_area(dsa, pstate->tbmiterator);
-- 
2.50.1 (Apple Git-155)


--Xf36GNcW+0xZNily
Content-Type: text/plain; charset=us-ascii
Content-Disposition: attachment;
	filename=v2-0003-convert-FixedParallelState-last_xlog_end-to-an-at.patch



^ permalink  raw  reply  [nested|flat] 440+ messages in thread

* [PATCH v1 2/8] convert ParallelBitmapHeapState->state to an atomic
@ 2026-07-09 18:38 Nathan Bossart <nathan@postgresql.org>
  0 siblings, 0 replies; 440+ messages in thread

From: Nathan Bossart @ 2026-07-09 18:38 UTC (permalink / raw)

---
 src/backend/executor/nodeBitmapHeapscan.c | 21 ++++++---------------
 1 file changed, 6 insertions(+), 15 deletions(-)

diff --git a/src/backend/executor/nodeBitmapHeapscan.c b/src/backend/executor/nodeBitmapHeapscan.c
index 83d6478bc2b..f2bb487bf10 100644
--- a/src/backend/executor/nodeBitmapHeapscan.c
+++ b/src/backend/executor/nodeBitmapHeapscan.c
@@ -79,7 +79,6 @@ typedef enum
 /* ----------------
  *	 ParallelBitmapHeapState information
  *		tbmiterator				iterator for scanning current pages
- *		mutex					mutual exclusion for state
  *		state					current state of the TIDBitmap
  *		cv						conditional wait variable
  * ----------------
@@ -87,8 +86,7 @@ typedef enum
 typedef struct ParallelBitmapHeapState
 {
 	dsa_pointer tbmiterator;
-	slock_t		mutex;
-	SharedBitmapState state;
+	pg_atomic_uint32 state;
 	ConditionVariable cv;
 } ParallelBitmapHeapState;
 
@@ -228,9 +226,7 @@ BitmapHeapNext(BitmapHeapScanState *node)
 static inline void
 BitmapDoneInitializingSharedState(ParallelBitmapHeapState *pstate)
 {
-	SpinLockAcquire(&pstate->mutex);
-	pstate->state = BM_FINISHED;
-	SpinLockRelease(&pstate->mutex);
+	pg_atomic_write_membarrier_u32(&pstate->state, BM_FINISHED);
 	ConditionVariableBroadcast(&pstate->cv);
 }
 
@@ -480,11 +476,8 @@ BitmapShouldInitializeSharedState(ParallelBitmapHeapState *pstate)
 
 	while (1)
 	{
-		SpinLockAcquire(&pstate->mutex);
-		state = pstate->state;
-		if (pstate->state == BM_INITIAL)
-			pstate->state = BM_INPROGRESS;
-		SpinLockRelease(&pstate->mutex);
+		state = BM_INITIAL;
+		pg_atomic_compare_exchange_u32(&pstate->state, &state, BM_INPROGRESS);
 
 		/* Exit if bitmap is done, or if we're the leader. */
 		if (state != BM_INPROGRESS)
@@ -538,9 +531,7 @@ ExecBitmapHeapInitializeDSM(BitmapHeapScanState *node,
 
 	pstate->tbmiterator = 0;
 
-	/* Initialize the mutex */
-	SpinLockInit(&pstate->mutex);
-	pstate->state = BM_INITIAL;
+	pg_atomic_init_u32(&pstate->state, BM_INITIAL);
 
 	ConditionVariableInit(&pstate->cv);
 
@@ -565,7 +556,7 @@ ExecBitmapHeapReInitializeDSM(BitmapHeapScanState *node,
 	if (dsa == NULL)
 		return;
 
-	pstate->state = BM_INITIAL;
+	pg_atomic_write_u32(&pstate->state, BM_INITIAL);
 
 	if (DsaPointerIsValid(pstate->tbmiterator))
 		tbm_free_shared_area(dsa, pstate->tbmiterator);
-- 
2.50.1 (Apple Git-155)


--Ot5x3ffkWEuxilWO
Content-Type: text/plain; charset=us-ascii
Content-Disposition: attachment;
	filename=v1-0003-convert-FixedParallelState-last_xlog_end-to-an-at.patch



^ permalink  raw  reply  [nested|flat] 440+ messages in thread

* [PATCH v1 2/8] convert ParallelBitmapHeapState->state to an atomic
@ 2026-07-09 18:38 Nathan Bossart <nathan@postgresql.org>
  0 siblings, 0 replies; 440+ messages in thread

From: Nathan Bossart @ 2026-07-09 18:38 UTC (permalink / raw)

---
 src/backend/executor/nodeBitmapHeapscan.c | 21 ++++++---------------
 1 file changed, 6 insertions(+), 15 deletions(-)

diff --git a/src/backend/executor/nodeBitmapHeapscan.c b/src/backend/executor/nodeBitmapHeapscan.c
index 83d6478bc2b..f2bb487bf10 100644
--- a/src/backend/executor/nodeBitmapHeapscan.c
+++ b/src/backend/executor/nodeBitmapHeapscan.c
@@ -79,7 +79,6 @@ typedef enum
 /* ----------------
  *	 ParallelBitmapHeapState information
  *		tbmiterator				iterator for scanning current pages
- *		mutex					mutual exclusion for state
  *		state					current state of the TIDBitmap
  *		cv						conditional wait variable
  * ----------------
@@ -87,8 +86,7 @@ typedef enum
 typedef struct ParallelBitmapHeapState
 {
 	dsa_pointer tbmiterator;
-	slock_t		mutex;
-	SharedBitmapState state;
+	pg_atomic_uint32 state;
 	ConditionVariable cv;
 } ParallelBitmapHeapState;
 
@@ -228,9 +226,7 @@ BitmapHeapNext(BitmapHeapScanState *node)
 static inline void
 BitmapDoneInitializingSharedState(ParallelBitmapHeapState *pstate)
 {
-	SpinLockAcquire(&pstate->mutex);
-	pstate->state = BM_FINISHED;
-	SpinLockRelease(&pstate->mutex);
+	pg_atomic_write_membarrier_u32(&pstate->state, BM_FINISHED);
 	ConditionVariableBroadcast(&pstate->cv);
 }
 
@@ -480,11 +476,8 @@ BitmapShouldInitializeSharedState(ParallelBitmapHeapState *pstate)
 
 	while (1)
 	{
-		SpinLockAcquire(&pstate->mutex);
-		state = pstate->state;
-		if (pstate->state == BM_INITIAL)
-			pstate->state = BM_INPROGRESS;
-		SpinLockRelease(&pstate->mutex);
+		state = BM_INITIAL;
+		pg_atomic_compare_exchange_u32(&pstate->state, &state, BM_INPROGRESS);
 
 		/* Exit if bitmap is done, or if we're the leader. */
 		if (state != BM_INPROGRESS)
@@ -538,9 +531,7 @@ ExecBitmapHeapInitializeDSM(BitmapHeapScanState *node,
 
 	pstate->tbmiterator = 0;
 
-	/* Initialize the mutex */
-	SpinLockInit(&pstate->mutex);
-	pstate->state = BM_INITIAL;
+	pg_atomic_init_u32(&pstate->state, BM_INITIAL);
 
 	ConditionVariableInit(&pstate->cv);
 
@@ -565,7 +556,7 @@ ExecBitmapHeapReInitializeDSM(BitmapHeapScanState *node,
 	if (dsa == NULL)
 		return;
 
-	pstate->state = BM_INITIAL;
+	pg_atomic_write_u32(&pstate->state, BM_INITIAL);
 
 	if (DsaPointerIsValid(pstate->tbmiterator))
 		tbm_free_shared_area(dsa, pstate->tbmiterator);
-- 
2.50.1 (Apple Git-155)


--Ot5x3ffkWEuxilWO
Content-Type: text/plain; charset=us-ascii
Content-Disposition: attachment;
	filename=v1-0003-convert-FixedParallelState-last_xlog_end-to-an-at.patch



^ permalink  raw  reply  [nested|flat] 440+ messages in thread

* [PATCH v1 2/8] convert ParallelBitmapHeapState->state to an atomic
@ 2026-07-09 18:38 Nathan Bossart <nathan@postgresql.org>
  0 siblings, 0 replies; 440+ messages in thread

From: Nathan Bossart @ 2026-07-09 18:38 UTC (permalink / raw)

---
 src/backend/executor/nodeBitmapHeapscan.c | 21 ++++++---------------
 1 file changed, 6 insertions(+), 15 deletions(-)

diff --git a/src/backend/executor/nodeBitmapHeapscan.c b/src/backend/executor/nodeBitmapHeapscan.c
index 83d6478bc2b..f2bb487bf10 100644
--- a/src/backend/executor/nodeBitmapHeapscan.c
+++ b/src/backend/executor/nodeBitmapHeapscan.c
@@ -79,7 +79,6 @@ typedef enum
 /* ----------------
  *	 ParallelBitmapHeapState information
  *		tbmiterator				iterator for scanning current pages
- *		mutex					mutual exclusion for state
  *		state					current state of the TIDBitmap
  *		cv						conditional wait variable
  * ----------------
@@ -87,8 +86,7 @@ typedef enum
 typedef struct ParallelBitmapHeapState
 {
 	dsa_pointer tbmiterator;
-	slock_t		mutex;
-	SharedBitmapState state;
+	pg_atomic_uint32 state;
 	ConditionVariable cv;
 } ParallelBitmapHeapState;
 
@@ -228,9 +226,7 @@ BitmapHeapNext(BitmapHeapScanState *node)
 static inline void
 BitmapDoneInitializingSharedState(ParallelBitmapHeapState *pstate)
 {
-	SpinLockAcquire(&pstate->mutex);
-	pstate->state = BM_FINISHED;
-	SpinLockRelease(&pstate->mutex);
+	pg_atomic_write_membarrier_u32(&pstate->state, BM_FINISHED);
 	ConditionVariableBroadcast(&pstate->cv);
 }
 
@@ -480,11 +476,8 @@ BitmapShouldInitializeSharedState(ParallelBitmapHeapState *pstate)
 
 	while (1)
 	{
-		SpinLockAcquire(&pstate->mutex);
-		state = pstate->state;
-		if (pstate->state == BM_INITIAL)
-			pstate->state = BM_INPROGRESS;
-		SpinLockRelease(&pstate->mutex);
+		state = BM_INITIAL;
+		pg_atomic_compare_exchange_u32(&pstate->state, &state, BM_INPROGRESS);
 
 		/* Exit if bitmap is done, or if we're the leader. */
 		if (state != BM_INPROGRESS)
@@ -538,9 +531,7 @@ ExecBitmapHeapInitializeDSM(BitmapHeapScanState *node,
 
 	pstate->tbmiterator = 0;
 
-	/* Initialize the mutex */
-	SpinLockInit(&pstate->mutex);
-	pstate->state = BM_INITIAL;
+	pg_atomic_init_u32(&pstate->state, BM_INITIAL);
 
 	ConditionVariableInit(&pstate->cv);
 
@@ -565,7 +556,7 @@ ExecBitmapHeapReInitializeDSM(BitmapHeapScanState *node,
 	if (dsa == NULL)
 		return;
 
-	pstate->state = BM_INITIAL;
+	pg_atomic_write_u32(&pstate->state, BM_INITIAL);
 
 	if (DsaPointerIsValid(pstate->tbmiterator))
 		tbm_free_shared_area(dsa, pstate->tbmiterator);
-- 
2.50.1 (Apple Git-155)


--Ot5x3ffkWEuxilWO
Content-Type: text/plain; charset=us-ascii
Content-Disposition: attachment;
	filename=v1-0003-convert-FixedParallelState-last_xlog_end-to-an-at.patch



^ permalink  raw  reply  [nested|flat] 440+ messages in thread

* [PATCH v1 2/8] convert ParallelBitmapHeapState->state to an atomic
@ 2026-07-09 18:38 Nathan Bossart <nathan@postgresql.org>
  0 siblings, 0 replies; 440+ messages in thread

From: Nathan Bossart @ 2026-07-09 18:38 UTC (permalink / raw)

---
 src/backend/executor/nodeBitmapHeapscan.c | 21 ++++++---------------
 1 file changed, 6 insertions(+), 15 deletions(-)

diff --git a/src/backend/executor/nodeBitmapHeapscan.c b/src/backend/executor/nodeBitmapHeapscan.c
index 83d6478bc2b..f2bb487bf10 100644
--- a/src/backend/executor/nodeBitmapHeapscan.c
+++ b/src/backend/executor/nodeBitmapHeapscan.c
@@ -79,7 +79,6 @@ typedef enum
 /* ----------------
  *	 ParallelBitmapHeapState information
  *		tbmiterator				iterator for scanning current pages
- *		mutex					mutual exclusion for state
  *		state					current state of the TIDBitmap
  *		cv						conditional wait variable
  * ----------------
@@ -87,8 +86,7 @@ typedef enum
 typedef struct ParallelBitmapHeapState
 {
 	dsa_pointer tbmiterator;
-	slock_t		mutex;
-	SharedBitmapState state;
+	pg_atomic_uint32 state;
 	ConditionVariable cv;
 } ParallelBitmapHeapState;
 
@@ -228,9 +226,7 @@ BitmapHeapNext(BitmapHeapScanState *node)
 static inline void
 BitmapDoneInitializingSharedState(ParallelBitmapHeapState *pstate)
 {
-	SpinLockAcquire(&pstate->mutex);
-	pstate->state = BM_FINISHED;
-	SpinLockRelease(&pstate->mutex);
+	pg_atomic_write_membarrier_u32(&pstate->state, BM_FINISHED);
 	ConditionVariableBroadcast(&pstate->cv);
 }
 
@@ -480,11 +476,8 @@ BitmapShouldInitializeSharedState(ParallelBitmapHeapState *pstate)
 
 	while (1)
 	{
-		SpinLockAcquire(&pstate->mutex);
-		state = pstate->state;
-		if (pstate->state == BM_INITIAL)
-			pstate->state = BM_INPROGRESS;
-		SpinLockRelease(&pstate->mutex);
+		state = BM_INITIAL;
+		pg_atomic_compare_exchange_u32(&pstate->state, &state, BM_INPROGRESS);
 
 		/* Exit if bitmap is done, or if we're the leader. */
 		if (state != BM_INPROGRESS)
@@ -538,9 +531,7 @@ ExecBitmapHeapInitializeDSM(BitmapHeapScanState *node,
 
 	pstate->tbmiterator = 0;
 
-	/* Initialize the mutex */
-	SpinLockInit(&pstate->mutex);
-	pstate->state = BM_INITIAL;
+	pg_atomic_init_u32(&pstate->state, BM_INITIAL);
 
 	ConditionVariableInit(&pstate->cv);
 
@@ -565,7 +556,7 @@ ExecBitmapHeapReInitializeDSM(BitmapHeapScanState *node,
 	if (dsa == NULL)
 		return;
 
-	pstate->state = BM_INITIAL;
+	pg_atomic_write_u32(&pstate->state, BM_INITIAL);
 
 	if (DsaPointerIsValid(pstate->tbmiterator))
 		tbm_free_shared_area(dsa, pstate->tbmiterator);
-- 
2.50.1 (Apple Git-155)


--Ot5x3ffkWEuxilWO
Content-Type: text/plain; charset=us-ascii
Content-Disposition: attachment;
	filename=v1-0003-convert-FixedParallelState-last_xlog_end-to-an-at.patch



^ permalink  raw  reply  [nested|flat] 440+ messages in thread

* [PATCH v1 2/8] convert ParallelBitmapHeapState->state to an atomic
@ 2026-07-09 18:38 Nathan Bossart <nathan@postgresql.org>
  0 siblings, 0 replies; 440+ messages in thread

From: Nathan Bossart @ 2026-07-09 18:38 UTC (permalink / raw)

---
 src/backend/executor/nodeBitmapHeapscan.c | 21 ++++++---------------
 1 file changed, 6 insertions(+), 15 deletions(-)

diff --git a/src/backend/executor/nodeBitmapHeapscan.c b/src/backend/executor/nodeBitmapHeapscan.c
index 83d6478bc2b..f2bb487bf10 100644
--- a/src/backend/executor/nodeBitmapHeapscan.c
+++ b/src/backend/executor/nodeBitmapHeapscan.c
@@ -79,7 +79,6 @@ typedef enum
 /* ----------------
  *	 ParallelBitmapHeapState information
  *		tbmiterator				iterator for scanning current pages
- *		mutex					mutual exclusion for state
  *		state					current state of the TIDBitmap
  *		cv						conditional wait variable
  * ----------------
@@ -87,8 +86,7 @@ typedef enum
 typedef struct ParallelBitmapHeapState
 {
 	dsa_pointer tbmiterator;
-	slock_t		mutex;
-	SharedBitmapState state;
+	pg_atomic_uint32 state;
 	ConditionVariable cv;
 } ParallelBitmapHeapState;
 
@@ -228,9 +226,7 @@ BitmapHeapNext(BitmapHeapScanState *node)
 static inline void
 BitmapDoneInitializingSharedState(ParallelBitmapHeapState *pstate)
 {
-	SpinLockAcquire(&pstate->mutex);
-	pstate->state = BM_FINISHED;
-	SpinLockRelease(&pstate->mutex);
+	pg_atomic_write_membarrier_u32(&pstate->state, BM_FINISHED);
 	ConditionVariableBroadcast(&pstate->cv);
 }
 
@@ -480,11 +476,8 @@ BitmapShouldInitializeSharedState(ParallelBitmapHeapState *pstate)
 
 	while (1)
 	{
-		SpinLockAcquire(&pstate->mutex);
-		state = pstate->state;
-		if (pstate->state == BM_INITIAL)
-			pstate->state = BM_INPROGRESS;
-		SpinLockRelease(&pstate->mutex);
+		state = BM_INITIAL;
+		pg_atomic_compare_exchange_u32(&pstate->state, &state, BM_INPROGRESS);
 
 		/* Exit if bitmap is done, or if we're the leader. */
 		if (state != BM_INPROGRESS)
@@ -538,9 +531,7 @@ ExecBitmapHeapInitializeDSM(BitmapHeapScanState *node,
 
 	pstate->tbmiterator = 0;
 
-	/* Initialize the mutex */
-	SpinLockInit(&pstate->mutex);
-	pstate->state = BM_INITIAL;
+	pg_atomic_init_u32(&pstate->state, BM_INITIAL);
 
 	ConditionVariableInit(&pstate->cv);
 
@@ -565,7 +556,7 @@ ExecBitmapHeapReInitializeDSM(BitmapHeapScanState *node,
 	if (dsa == NULL)
 		return;
 
-	pstate->state = BM_INITIAL;
+	pg_atomic_write_u32(&pstate->state, BM_INITIAL);
 
 	if (DsaPointerIsValid(pstate->tbmiterator))
 		tbm_free_shared_area(dsa, pstate->tbmiterator);
-- 
2.50.1 (Apple Git-155)


--Ot5x3ffkWEuxilWO
Content-Type: text/plain; charset=us-ascii
Content-Disposition: attachment;
	filename=v1-0003-convert-FixedParallelState-last_xlog_end-to-an-at.patch



^ permalink  raw  reply  [nested|flat] 440+ messages in thread

* [PATCH v1 2/8] convert ParallelBitmapHeapState->state to an atomic
@ 2026-07-09 18:38 Nathan Bossart <nathan@postgresql.org>
  0 siblings, 0 replies; 440+ messages in thread

From: Nathan Bossart @ 2026-07-09 18:38 UTC (permalink / raw)

---
 src/backend/executor/nodeBitmapHeapscan.c | 21 ++++++---------------
 1 file changed, 6 insertions(+), 15 deletions(-)

diff --git a/src/backend/executor/nodeBitmapHeapscan.c b/src/backend/executor/nodeBitmapHeapscan.c
index 83d6478bc2b..f2bb487bf10 100644
--- a/src/backend/executor/nodeBitmapHeapscan.c
+++ b/src/backend/executor/nodeBitmapHeapscan.c
@@ -79,7 +79,6 @@ typedef enum
 /* ----------------
  *	 ParallelBitmapHeapState information
  *		tbmiterator				iterator for scanning current pages
- *		mutex					mutual exclusion for state
  *		state					current state of the TIDBitmap
  *		cv						conditional wait variable
  * ----------------
@@ -87,8 +86,7 @@ typedef enum
 typedef struct ParallelBitmapHeapState
 {
 	dsa_pointer tbmiterator;
-	slock_t		mutex;
-	SharedBitmapState state;
+	pg_atomic_uint32 state;
 	ConditionVariable cv;
 } ParallelBitmapHeapState;
 
@@ -228,9 +226,7 @@ BitmapHeapNext(BitmapHeapScanState *node)
 static inline void
 BitmapDoneInitializingSharedState(ParallelBitmapHeapState *pstate)
 {
-	SpinLockAcquire(&pstate->mutex);
-	pstate->state = BM_FINISHED;
-	SpinLockRelease(&pstate->mutex);
+	pg_atomic_write_membarrier_u32(&pstate->state, BM_FINISHED);
 	ConditionVariableBroadcast(&pstate->cv);
 }
 
@@ -480,11 +476,8 @@ BitmapShouldInitializeSharedState(ParallelBitmapHeapState *pstate)
 
 	while (1)
 	{
-		SpinLockAcquire(&pstate->mutex);
-		state = pstate->state;
-		if (pstate->state == BM_INITIAL)
-			pstate->state = BM_INPROGRESS;
-		SpinLockRelease(&pstate->mutex);
+		state = BM_INITIAL;
+		pg_atomic_compare_exchange_u32(&pstate->state, &state, BM_INPROGRESS);
 
 		/* Exit if bitmap is done, or if we're the leader. */
 		if (state != BM_INPROGRESS)
@@ -538,9 +531,7 @@ ExecBitmapHeapInitializeDSM(BitmapHeapScanState *node,
 
 	pstate->tbmiterator = 0;
 
-	/* Initialize the mutex */
-	SpinLockInit(&pstate->mutex);
-	pstate->state = BM_INITIAL;
+	pg_atomic_init_u32(&pstate->state, BM_INITIAL);
 
 	ConditionVariableInit(&pstate->cv);
 
@@ -565,7 +556,7 @@ ExecBitmapHeapReInitializeDSM(BitmapHeapScanState *node,
 	if (dsa == NULL)
 		return;
 
-	pstate->state = BM_INITIAL;
+	pg_atomic_write_u32(&pstate->state, BM_INITIAL);
 
 	if (DsaPointerIsValid(pstate->tbmiterator))
 		tbm_free_shared_area(dsa, pstate->tbmiterator);
-- 
2.50.1 (Apple Git-155)


--Ot5x3ffkWEuxilWO
Content-Type: text/plain; charset=us-ascii
Content-Disposition: attachment;
	filename=v1-0003-convert-FixedParallelState-last_xlog_end-to-an-at.patch



^ permalink  raw  reply  [nested|flat] 440+ messages in thread

* [PATCH v2 2/9] convert ParallelBitmapHeapState->state to an atomic
@ 2026-07-09 18:38 Nathan Bossart <nathan@postgresql.org>
  0 siblings, 0 replies; 440+ messages in thread

From: Nathan Bossart @ 2026-07-09 18:38 UTC (permalink / raw)

---
 src/backend/executor/nodeBitmapHeapscan.c | 23 +++++++----------------
 1 file changed, 7 insertions(+), 16 deletions(-)

diff --git a/src/backend/executor/nodeBitmapHeapscan.c b/src/backend/executor/nodeBitmapHeapscan.c
index 83d6478bc2b..a9e83f30687 100644
--- a/src/backend/executor/nodeBitmapHeapscan.c
+++ b/src/backend/executor/nodeBitmapHeapscan.c
@@ -79,7 +79,6 @@ typedef enum
 /* ----------------
  *	 ParallelBitmapHeapState information
  *		tbmiterator				iterator for scanning current pages
- *		mutex					mutual exclusion for state
  *		state					current state of the TIDBitmap
  *		cv						conditional wait variable
  * ----------------
@@ -87,8 +86,7 @@ typedef enum
 typedef struct ParallelBitmapHeapState
 {
 	dsa_pointer tbmiterator;
-	slock_t		mutex;
-	SharedBitmapState state;
+	pg_atomic_uint32 state;
 	ConditionVariable cv;
 } ParallelBitmapHeapState;
 
@@ -228,9 +226,7 @@ BitmapHeapNext(BitmapHeapScanState *node)
 static inline void
 BitmapDoneInitializingSharedState(ParallelBitmapHeapState *pstate)
 {
-	SpinLockAcquire(&pstate->mutex);
-	pstate->state = BM_FINISHED;
-	SpinLockRelease(&pstate->mutex);
+	pg_atomic_write_membarrier_u32(&pstate->state, BM_FINISHED);
 	ConditionVariableBroadcast(&pstate->cv);
 }
 
@@ -476,15 +472,12 @@ ExecInitBitmapHeapScan(BitmapHeapScan *node, EState *estate, int eflags)
 static bool
 BitmapShouldInitializeSharedState(ParallelBitmapHeapState *pstate)
 {
-	SharedBitmapState state;
+	uint32		state;
 
 	while (1)
 	{
-		SpinLockAcquire(&pstate->mutex);
-		state = pstate->state;
-		if (pstate->state == BM_INITIAL)
-			pstate->state = BM_INPROGRESS;
-		SpinLockRelease(&pstate->mutex);
+		state = BM_INITIAL;
+		pg_atomic_compare_exchange_u32(&pstate->state, &state, BM_INPROGRESS);
 
 		/* Exit if bitmap is done, or if we're the leader. */
 		if (state != BM_INPROGRESS)
@@ -538,9 +531,7 @@ ExecBitmapHeapInitializeDSM(BitmapHeapScanState *node,
 
 	pstate->tbmiterator = 0;
 
-	/* Initialize the mutex */
-	SpinLockInit(&pstate->mutex);
-	pstate->state = BM_INITIAL;
+	pg_atomic_init_u32(&pstate->state, BM_INITIAL);
 
 	ConditionVariableInit(&pstate->cv);
 
@@ -565,7 +556,7 @@ ExecBitmapHeapReInitializeDSM(BitmapHeapScanState *node,
 	if (dsa == NULL)
 		return;
 
-	pstate->state = BM_INITIAL;
+	pg_atomic_write_u32(&pstate->state, BM_INITIAL);
 
 	if (DsaPointerIsValid(pstate->tbmiterator))
 		tbm_free_shared_area(dsa, pstate->tbmiterator);
-- 
2.50.1 (Apple Git-155)


--Xf36GNcW+0xZNily
Content-Type: text/plain; charset=us-ascii
Content-Disposition: attachment;
	filename=v2-0003-convert-FixedParallelState-last_xlog_end-to-an-at.patch



^ permalink  raw  reply  [nested|flat] 440+ messages in thread

* [PATCH v1 2/8] convert ParallelBitmapHeapState->state to an atomic
@ 2026-07-09 18:38 Nathan Bossart <nathan@postgresql.org>
  0 siblings, 0 replies; 440+ messages in thread

From: Nathan Bossart @ 2026-07-09 18:38 UTC (permalink / raw)

---
 src/backend/executor/nodeBitmapHeapscan.c | 21 ++++++---------------
 1 file changed, 6 insertions(+), 15 deletions(-)

diff --git a/src/backend/executor/nodeBitmapHeapscan.c b/src/backend/executor/nodeBitmapHeapscan.c
index 83d6478bc2b..f2bb487bf10 100644
--- a/src/backend/executor/nodeBitmapHeapscan.c
+++ b/src/backend/executor/nodeBitmapHeapscan.c
@@ -79,7 +79,6 @@ typedef enum
 /* ----------------
  *	 ParallelBitmapHeapState information
  *		tbmiterator				iterator for scanning current pages
- *		mutex					mutual exclusion for state
  *		state					current state of the TIDBitmap
  *		cv						conditional wait variable
  * ----------------
@@ -87,8 +86,7 @@ typedef enum
 typedef struct ParallelBitmapHeapState
 {
 	dsa_pointer tbmiterator;
-	slock_t		mutex;
-	SharedBitmapState state;
+	pg_atomic_uint32 state;
 	ConditionVariable cv;
 } ParallelBitmapHeapState;
 
@@ -228,9 +226,7 @@ BitmapHeapNext(BitmapHeapScanState *node)
 static inline void
 BitmapDoneInitializingSharedState(ParallelBitmapHeapState *pstate)
 {
-	SpinLockAcquire(&pstate->mutex);
-	pstate->state = BM_FINISHED;
-	SpinLockRelease(&pstate->mutex);
+	pg_atomic_write_membarrier_u32(&pstate->state, BM_FINISHED);
 	ConditionVariableBroadcast(&pstate->cv);
 }
 
@@ -480,11 +476,8 @@ BitmapShouldInitializeSharedState(ParallelBitmapHeapState *pstate)
 
 	while (1)
 	{
-		SpinLockAcquire(&pstate->mutex);
-		state = pstate->state;
-		if (pstate->state == BM_INITIAL)
-			pstate->state = BM_INPROGRESS;
-		SpinLockRelease(&pstate->mutex);
+		state = BM_INITIAL;
+		pg_atomic_compare_exchange_u32(&pstate->state, &state, BM_INPROGRESS);
 
 		/* Exit if bitmap is done, or if we're the leader. */
 		if (state != BM_INPROGRESS)
@@ -538,9 +531,7 @@ ExecBitmapHeapInitializeDSM(BitmapHeapScanState *node,
 
 	pstate->tbmiterator = 0;
 
-	/* Initialize the mutex */
-	SpinLockInit(&pstate->mutex);
-	pstate->state = BM_INITIAL;
+	pg_atomic_init_u32(&pstate->state, BM_INITIAL);
 
 	ConditionVariableInit(&pstate->cv);
 
@@ -565,7 +556,7 @@ ExecBitmapHeapReInitializeDSM(BitmapHeapScanState *node,
 	if (dsa == NULL)
 		return;
 
-	pstate->state = BM_INITIAL;
+	pg_atomic_write_u32(&pstate->state, BM_INITIAL);
 
 	if (DsaPointerIsValid(pstate->tbmiterator))
 		tbm_free_shared_area(dsa, pstate->tbmiterator);
-- 
2.50.1 (Apple Git-155)


--Ot5x3ffkWEuxilWO
Content-Type: text/plain; charset=us-ascii
Content-Disposition: attachment;
	filename=v1-0003-convert-FixedParallelState-last_xlog_end-to-an-at.patch



^ permalink  raw  reply  [nested|flat] 440+ messages in thread

* [PATCH v1 2/8] convert ParallelBitmapHeapState->state to an atomic
@ 2026-07-09 18:38 Nathan Bossart <nathan@postgresql.org>
  0 siblings, 0 replies; 440+ messages in thread

From: Nathan Bossart @ 2026-07-09 18:38 UTC (permalink / raw)

---
 src/backend/executor/nodeBitmapHeapscan.c | 21 ++++++---------------
 1 file changed, 6 insertions(+), 15 deletions(-)

diff --git a/src/backend/executor/nodeBitmapHeapscan.c b/src/backend/executor/nodeBitmapHeapscan.c
index 83d6478bc2b..f2bb487bf10 100644
--- a/src/backend/executor/nodeBitmapHeapscan.c
+++ b/src/backend/executor/nodeBitmapHeapscan.c
@@ -79,7 +79,6 @@ typedef enum
 /* ----------------
  *	 ParallelBitmapHeapState information
  *		tbmiterator				iterator for scanning current pages
- *		mutex					mutual exclusion for state
  *		state					current state of the TIDBitmap
  *		cv						conditional wait variable
  * ----------------
@@ -87,8 +86,7 @@ typedef enum
 typedef struct ParallelBitmapHeapState
 {
 	dsa_pointer tbmiterator;
-	slock_t		mutex;
-	SharedBitmapState state;
+	pg_atomic_uint32 state;
 	ConditionVariable cv;
 } ParallelBitmapHeapState;
 
@@ -228,9 +226,7 @@ BitmapHeapNext(BitmapHeapScanState *node)
 static inline void
 BitmapDoneInitializingSharedState(ParallelBitmapHeapState *pstate)
 {
-	SpinLockAcquire(&pstate->mutex);
-	pstate->state = BM_FINISHED;
-	SpinLockRelease(&pstate->mutex);
+	pg_atomic_write_membarrier_u32(&pstate->state, BM_FINISHED);
 	ConditionVariableBroadcast(&pstate->cv);
 }
 
@@ -480,11 +476,8 @@ BitmapShouldInitializeSharedState(ParallelBitmapHeapState *pstate)
 
 	while (1)
 	{
-		SpinLockAcquire(&pstate->mutex);
-		state = pstate->state;
-		if (pstate->state == BM_INITIAL)
-			pstate->state = BM_INPROGRESS;
-		SpinLockRelease(&pstate->mutex);
+		state = BM_INITIAL;
+		pg_atomic_compare_exchange_u32(&pstate->state, &state, BM_INPROGRESS);
 
 		/* Exit if bitmap is done, or if we're the leader. */
 		if (state != BM_INPROGRESS)
@@ -538,9 +531,7 @@ ExecBitmapHeapInitializeDSM(BitmapHeapScanState *node,
 
 	pstate->tbmiterator = 0;
 
-	/* Initialize the mutex */
-	SpinLockInit(&pstate->mutex);
-	pstate->state = BM_INITIAL;
+	pg_atomic_init_u32(&pstate->state, BM_INITIAL);
 
 	ConditionVariableInit(&pstate->cv);
 
@@ -565,7 +556,7 @@ ExecBitmapHeapReInitializeDSM(BitmapHeapScanState *node,
 	if (dsa == NULL)
 		return;
 
-	pstate->state = BM_INITIAL;
+	pg_atomic_write_u32(&pstate->state, BM_INITIAL);
 
 	if (DsaPointerIsValid(pstate->tbmiterator))
 		tbm_free_shared_area(dsa, pstate->tbmiterator);
-- 
2.50.1 (Apple Git-155)


--Ot5x3ffkWEuxilWO
Content-Type: text/plain; charset=us-ascii
Content-Disposition: attachment;
	filename=v1-0003-convert-FixedParallelState-last_xlog_end-to-an-at.patch



^ permalink  raw  reply  [nested|flat] 440+ messages in thread

* [PATCH v1 2/8] convert ParallelBitmapHeapState->state to an atomic
@ 2026-07-09 18:38 Nathan Bossart <nathan@postgresql.org>
  0 siblings, 0 replies; 440+ messages in thread

From: Nathan Bossart @ 2026-07-09 18:38 UTC (permalink / raw)

---
 src/backend/executor/nodeBitmapHeapscan.c | 21 ++++++---------------
 1 file changed, 6 insertions(+), 15 deletions(-)

diff --git a/src/backend/executor/nodeBitmapHeapscan.c b/src/backend/executor/nodeBitmapHeapscan.c
index 83d6478bc2b..f2bb487bf10 100644
--- a/src/backend/executor/nodeBitmapHeapscan.c
+++ b/src/backend/executor/nodeBitmapHeapscan.c
@@ -79,7 +79,6 @@ typedef enum
 /* ----------------
  *	 ParallelBitmapHeapState information
  *		tbmiterator				iterator for scanning current pages
- *		mutex					mutual exclusion for state
  *		state					current state of the TIDBitmap
  *		cv						conditional wait variable
  * ----------------
@@ -87,8 +86,7 @@ typedef enum
 typedef struct ParallelBitmapHeapState
 {
 	dsa_pointer tbmiterator;
-	slock_t		mutex;
-	SharedBitmapState state;
+	pg_atomic_uint32 state;
 	ConditionVariable cv;
 } ParallelBitmapHeapState;
 
@@ -228,9 +226,7 @@ BitmapHeapNext(BitmapHeapScanState *node)
 static inline void
 BitmapDoneInitializingSharedState(ParallelBitmapHeapState *pstate)
 {
-	SpinLockAcquire(&pstate->mutex);
-	pstate->state = BM_FINISHED;
-	SpinLockRelease(&pstate->mutex);
+	pg_atomic_write_membarrier_u32(&pstate->state, BM_FINISHED);
 	ConditionVariableBroadcast(&pstate->cv);
 }
 
@@ -480,11 +476,8 @@ BitmapShouldInitializeSharedState(ParallelBitmapHeapState *pstate)
 
 	while (1)
 	{
-		SpinLockAcquire(&pstate->mutex);
-		state = pstate->state;
-		if (pstate->state == BM_INITIAL)
-			pstate->state = BM_INPROGRESS;
-		SpinLockRelease(&pstate->mutex);
+		state = BM_INITIAL;
+		pg_atomic_compare_exchange_u32(&pstate->state, &state, BM_INPROGRESS);
 
 		/* Exit if bitmap is done, or if we're the leader. */
 		if (state != BM_INPROGRESS)
@@ -538,9 +531,7 @@ ExecBitmapHeapInitializeDSM(BitmapHeapScanState *node,
 
 	pstate->tbmiterator = 0;
 
-	/* Initialize the mutex */
-	SpinLockInit(&pstate->mutex);
-	pstate->state = BM_INITIAL;
+	pg_atomic_init_u32(&pstate->state, BM_INITIAL);
 
 	ConditionVariableInit(&pstate->cv);
 
@@ -565,7 +556,7 @@ ExecBitmapHeapReInitializeDSM(BitmapHeapScanState *node,
 	if (dsa == NULL)
 		return;
 
-	pstate->state = BM_INITIAL;
+	pg_atomic_write_u32(&pstate->state, BM_INITIAL);
 
 	if (DsaPointerIsValid(pstate->tbmiterator))
 		tbm_free_shared_area(dsa, pstate->tbmiterator);
-- 
2.50.1 (Apple Git-155)


--Ot5x3ffkWEuxilWO
Content-Type: text/plain; charset=us-ascii
Content-Disposition: attachment;
	filename=v1-0003-convert-FixedParallelState-last_xlog_end-to-an-at.patch



^ permalink  raw  reply  [nested|flat] 440+ messages in thread

* [PATCH v2 2/9] convert ParallelBitmapHeapState->state to an atomic
@ 2026-07-09 18:38 Nathan Bossart <nathan@postgresql.org>
  0 siblings, 0 replies; 440+ messages in thread

From: Nathan Bossart @ 2026-07-09 18:38 UTC (permalink / raw)

---
 src/backend/executor/nodeBitmapHeapscan.c | 23 +++++++----------------
 1 file changed, 7 insertions(+), 16 deletions(-)

diff --git a/src/backend/executor/nodeBitmapHeapscan.c b/src/backend/executor/nodeBitmapHeapscan.c
index 83d6478bc2b..a9e83f30687 100644
--- a/src/backend/executor/nodeBitmapHeapscan.c
+++ b/src/backend/executor/nodeBitmapHeapscan.c
@@ -79,7 +79,6 @@ typedef enum
 /* ----------------
  *	 ParallelBitmapHeapState information
  *		tbmiterator				iterator for scanning current pages
- *		mutex					mutual exclusion for state
  *		state					current state of the TIDBitmap
  *		cv						conditional wait variable
  * ----------------
@@ -87,8 +86,7 @@ typedef enum
 typedef struct ParallelBitmapHeapState
 {
 	dsa_pointer tbmiterator;
-	slock_t		mutex;
-	SharedBitmapState state;
+	pg_atomic_uint32 state;
 	ConditionVariable cv;
 } ParallelBitmapHeapState;
 
@@ -228,9 +226,7 @@ BitmapHeapNext(BitmapHeapScanState *node)
 static inline void
 BitmapDoneInitializingSharedState(ParallelBitmapHeapState *pstate)
 {
-	SpinLockAcquire(&pstate->mutex);
-	pstate->state = BM_FINISHED;
-	SpinLockRelease(&pstate->mutex);
+	pg_atomic_write_membarrier_u32(&pstate->state, BM_FINISHED);
 	ConditionVariableBroadcast(&pstate->cv);
 }
 
@@ -476,15 +472,12 @@ ExecInitBitmapHeapScan(BitmapHeapScan *node, EState *estate, int eflags)
 static bool
 BitmapShouldInitializeSharedState(ParallelBitmapHeapState *pstate)
 {
-	SharedBitmapState state;
+	uint32		state;
 
 	while (1)
 	{
-		SpinLockAcquire(&pstate->mutex);
-		state = pstate->state;
-		if (pstate->state == BM_INITIAL)
-			pstate->state = BM_INPROGRESS;
-		SpinLockRelease(&pstate->mutex);
+		state = BM_INITIAL;
+		pg_atomic_compare_exchange_u32(&pstate->state, &state, BM_INPROGRESS);
 
 		/* Exit if bitmap is done, or if we're the leader. */
 		if (state != BM_INPROGRESS)
@@ -538,9 +531,7 @@ ExecBitmapHeapInitializeDSM(BitmapHeapScanState *node,
 
 	pstate->tbmiterator = 0;
 
-	/* Initialize the mutex */
-	SpinLockInit(&pstate->mutex);
-	pstate->state = BM_INITIAL;
+	pg_atomic_init_u32(&pstate->state, BM_INITIAL);
 
 	ConditionVariableInit(&pstate->cv);
 
@@ -565,7 +556,7 @@ ExecBitmapHeapReInitializeDSM(BitmapHeapScanState *node,
 	if (dsa == NULL)
 		return;
 
-	pstate->state = BM_INITIAL;
+	pg_atomic_write_u32(&pstate->state, BM_INITIAL);
 
 	if (DsaPointerIsValid(pstate->tbmiterator))
 		tbm_free_shared_area(dsa, pstate->tbmiterator);
-- 
2.50.1 (Apple Git-155)


--Xf36GNcW+0xZNily
Content-Type: text/plain; charset=us-ascii
Content-Disposition: attachment;
	filename=v2-0003-convert-FixedParallelState-last_xlog_end-to-an-at.patch



^ permalink  raw  reply  [nested|flat] 440+ messages in thread

* [PATCH v2 2/9] convert ParallelBitmapHeapState->state to an atomic
@ 2026-07-09 18:38 Nathan Bossart <nathan@postgresql.org>
  0 siblings, 0 replies; 440+ messages in thread

From: Nathan Bossart @ 2026-07-09 18:38 UTC (permalink / raw)

---
 src/backend/executor/nodeBitmapHeapscan.c | 23 +++++++----------------
 1 file changed, 7 insertions(+), 16 deletions(-)

diff --git a/src/backend/executor/nodeBitmapHeapscan.c b/src/backend/executor/nodeBitmapHeapscan.c
index 83d6478bc2b..a9e83f30687 100644
--- a/src/backend/executor/nodeBitmapHeapscan.c
+++ b/src/backend/executor/nodeBitmapHeapscan.c
@@ -79,7 +79,6 @@ typedef enum
 /* ----------------
  *	 ParallelBitmapHeapState information
  *		tbmiterator				iterator for scanning current pages
- *		mutex					mutual exclusion for state
  *		state					current state of the TIDBitmap
  *		cv						conditional wait variable
  * ----------------
@@ -87,8 +86,7 @@ typedef enum
 typedef struct ParallelBitmapHeapState
 {
 	dsa_pointer tbmiterator;
-	slock_t		mutex;
-	SharedBitmapState state;
+	pg_atomic_uint32 state;
 	ConditionVariable cv;
 } ParallelBitmapHeapState;
 
@@ -228,9 +226,7 @@ BitmapHeapNext(BitmapHeapScanState *node)
 static inline void
 BitmapDoneInitializingSharedState(ParallelBitmapHeapState *pstate)
 {
-	SpinLockAcquire(&pstate->mutex);
-	pstate->state = BM_FINISHED;
-	SpinLockRelease(&pstate->mutex);
+	pg_atomic_write_membarrier_u32(&pstate->state, BM_FINISHED);
 	ConditionVariableBroadcast(&pstate->cv);
 }
 
@@ -476,15 +472,12 @@ ExecInitBitmapHeapScan(BitmapHeapScan *node, EState *estate, int eflags)
 static bool
 BitmapShouldInitializeSharedState(ParallelBitmapHeapState *pstate)
 {
-	SharedBitmapState state;
+	uint32		state;
 
 	while (1)
 	{
-		SpinLockAcquire(&pstate->mutex);
-		state = pstate->state;
-		if (pstate->state == BM_INITIAL)
-			pstate->state = BM_INPROGRESS;
-		SpinLockRelease(&pstate->mutex);
+		state = BM_INITIAL;
+		pg_atomic_compare_exchange_u32(&pstate->state, &state, BM_INPROGRESS);
 
 		/* Exit if bitmap is done, or if we're the leader. */
 		if (state != BM_INPROGRESS)
@@ -538,9 +531,7 @@ ExecBitmapHeapInitializeDSM(BitmapHeapScanState *node,
 
 	pstate->tbmiterator = 0;
 
-	/* Initialize the mutex */
-	SpinLockInit(&pstate->mutex);
-	pstate->state = BM_INITIAL;
+	pg_atomic_init_u32(&pstate->state, BM_INITIAL);
 
 	ConditionVariableInit(&pstate->cv);
 
@@ -565,7 +556,7 @@ ExecBitmapHeapReInitializeDSM(BitmapHeapScanState *node,
 	if (dsa == NULL)
 		return;
 
-	pstate->state = BM_INITIAL;
+	pg_atomic_write_u32(&pstate->state, BM_INITIAL);
 
 	if (DsaPointerIsValid(pstate->tbmiterator))
 		tbm_free_shared_area(dsa, pstate->tbmiterator);
-- 
2.50.1 (Apple Git-155)


--Xf36GNcW+0xZNily
Content-Type: text/plain; charset=us-ascii
Content-Disposition: attachment;
	filename=v2-0003-convert-FixedParallelState-last_xlog_end-to-an-at.patch



^ permalink  raw  reply  [nested|flat] 440+ messages in thread

* [PATCH v2 2/9] convert ParallelBitmapHeapState->state to an atomic
@ 2026-07-09 18:38 Nathan Bossart <nathan@postgresql.org>
  0 siblings, 0 replies; 440+ messages in thread

From: Nathan Bossart @ 2026-07-09 18:38 UTC (permalink / raw)

---
 src/backend/executor/nodeBitmapHeapscan.c | 23 +++++++----------------
 1 file changed, 7 insertions(+), 16 deletions(-)

diff --git a/src/backend/executor/nodeBitmapHeapscan.c b/src/backend/executor/nodeBitmapHeapscan.c
index 83d6478bc2b..a9e83f30687 100644
--- a/src/backend/executor/nodeBitmapHeapscan.c
+++ b/src/backend/executor/nodeBitmapHeapscan.c
@@ -79,7 +79,6 @@ typedef enum
 /* ----------------
  *	 ParallelBitmapHeapState information
  *		tbmiterator				iterator for scanning current pages
- *		mutex					mutual exclusion for state
  *		state					current state of the TIDBitmap
  *		cv						conditional wait variable
  * ----------------
@@ -87,8 +86,7 @@ typedef enum
 typedef struct ParallelBitmapHeapState
 {
 	dsa_pointer tbmiterator;
-	slock_t		mutex;
-	SharedBitmapState state;
+	pg_atomic_uint32 state;
 	ConditionVariable cv;
 } ParallelBitmapHeapState;
 
@@ -228,9 +226,7 @@ BitmapHeapNext(BitmapHeapScanState *node)
 static inline void
 BitmapDoneInitializingSharedState(ParallelBitmapHeapState *pstate)
 {
-	SpinLockAcquire(&pstate->mutex);
-	pstate->state = BM_FINISHED;
-	SpinLockRelease(&pstate->mutex);
+	pg_atomic_write_membarrier_u32(&pstate->state, BM_FINISHED);
 	ConditionVariableBroadcast(&pstate->cv);
 }
 
@@ -476,15 +472,12 @@ ExecInitBitmapHeapScan(BitmapHeapScan *node, EState *estate, int eflags)
 static bool
 BitmapShouldInitializeSharedState(ParallelBitmapHeapState *pstate)
 {
-	SharedBitmapState state;
+	uint32		state;
 
 	while (1)
 	{
-		SpinLockAcquire(&pstate->mutex);
-		state = pstate->state;
-		if (pstate->state == BM_INITIAL)
-			pstate->state = BM_INPROGRESS;
-		SpinLockRelease(&pstate->mutex);
+		state = BM_INITIAL;
+		pg_atomic_compare_exchange_u32(&pstate->state, &state, BM_INPROGRESS);
 
 		/* Exit if bitmap is done, or if we're the leader. */
 		if (state != BM_INPROGRESS)
@@ -538,9 +531,7 @@ ExecBitmapHeapInitializeDSM(BitmapHeapScanState *node,
 
 	pstate->tbmiterator = 0;
 
-	/* Initialize the mutex */
-	SpinLockInit(&pstate->mutex);
-	pstate->state = BM_INITIAL;
+	pg_atomic_init_u32(&pstate->state, BM_INITIAL);
 
 	ConditionVariableInit(&pstate->cv);
 
@@ -565,7 +556,7 @@ ExecBitmapHeapReInitializeDSM(BitmapHeapScanState *node,
 	if (dsa == NULL)
 		return;
 
-	pstate->state = BM_INITIAL;
+	pg_atomic_write_u32(&pstate->state, BM_INITIAL);
 
 	if (DsaPointerIsValid(pstate->tbmiterator))
 		tbm_free_shared_area(dsa, pstate->tbmiterator);
-- 
2.50.1 (Apple Git-155)


--Xf36GNcW+0xZNily
Content-Type: text/plain; charset=us-ascii
Content-Disposition: attachment;
	filename=v2-0003-convert-FixedParallelState-last_xlog_end-to-an-at.patch



^ permalink  raw  reply  [nested|flat] 440+ messages in thread

* [PATCH v1 2/8] convert ParallelBitmapHeapState->state to an atomic
@ 2026-07-09 18:38 Nathan Bossart <nathan@postgresql.org>
  0 siblings, 0 replies; 440+ messages in thread

From: Nathan Bossart @ 2026-07-09 18:38 UTC (permalink / raw)

---
 src/backend/executor/nodeBitmapHeapscan.c | 21 ++++++---------------
 1 file changed, 6 insertions(+), 15 deletions(-)

diff --git a/src/backend/executor/nodeBitmapHeapscan.c b/src/backend/executor/nodeBitmapHeapscan.c
index 83d6478bc2b..f2bb487bf10 100644
--- a/src/backend/executor/nodeBitmapHeapscan.c
+++ b/src/backend/executor/nodeBitmapHeapscan.c
@@ -79,7 +79,6 @@ typedef enum
 /* ----------------
  *	 ParallelBitmapHeapState information
  *		tbmiterator				iterator for scanning current pages
- *		mutex					mutual exclusion for state
  *		state					current state of the TIDBitmap
  *		cv						conditional wait variable
  * ----------------
@@ -87,8 +86,7 @@ typedef enum
 typedef struct ParallelBitmapHeapState
 {
 	dsa_pointer tbmiterator;
-	slock_t		mutex;
-	SharedBitmapState state;
+	pg_atomic_uint32 state;
 	ConditionVariable cv;
 } ParallelBitmapHeapState;
 
@@ -228,9 +226,7 @@ BitmapHeapNext(BitmapHeapScanState *node)
 static inline void
 BitmapDoneInitializingSharedState(ParallelBitmapHeapState *pstate)
 {
-	SpinLockAcquire(&pstate->mutex);
-	pstate->state = BM_FINISHED;
-	SpinLockRelease(&pstate->mutex);
+	pg_atomic_write_membarrier_u32(&pstate->state, BM_FINISHED);
 	ConditionVariableBroadcast(&pstate->cv);
 }
 
@@ -480,11 +476,8 @@ BitmapShouldInitializeSharedState(ParallelBitmapHeapState *pstate)
 
 	while (1)
 	{
-		SpinLockAcquire(&pstate->mutex);
-		state = pstate->state;
-		if (pstate->state == BM_INITIAL)
-			pstate->state = BM_INPROGRESS;
-		SpinLockRelease(&pstate->mutex);
+		state = BM_INITIAL;
+		pg_atomic_compare_exchange_u32(&pstate->state, &state, BM_INPROGRESS);
 
 		/* Exit if bitmap is done, or if we're the leader. */
 		if (state != BM_INPROGRESS)
@@ -538,9 +531,7 @@ ExecBitmapHeapInitializeDSM(BitmapHeapScanState *node,
 
 	pstate->tbmiterator = 0;
 
-	/* Initialize the mutex */
-	SpinLockInit(&pstate->mutex);
-	pstate->state = BM_INITIAL;
+	pg_atomic_init_u32(&pstate->state, BM_INITIAL);
 
 	ConditionVariableInit(&pstate->cv);
 
@@ -565,7 +556,7 @@ ExecBitmapHeapReInitializeDSM(BitmapHeapScanState *node,
 	if (dsa == NULL)
 		return;
 
-	pstate->state = BM_INITIAL;
+	pg_atomic_write_u32(&pstate->state, BM_INITIAL);
 
 	if (DsaPointerIsValid(pstate->tbmiterator))
 		tbm_free_shared_area(dsa, pstate->tbmiterator);
-- 
2.50.1 (Apple Git-155)


--Ot5x3ffkWEuxilWO
Content-Type: text/plain; charset=us-ascii
Content-Disposition: attachment;
	filename=v1-0003-convert-FixedParallelState-last_xlog_end-to-an-at.patch



^ permalink  raw  reply  [nested|flat] 440+ messages in thread

* [PATCH v1 2/8] convert ParallelBitmapHeapState->state to an atomic
@ 2026-07-09 18:38 Nathan Bossart <nathan@postgresql.org>
  0 siblings, 0 replies; 440+ messages in thread

From: Nathan Bossart @ 2026-07-09 18:38 UTC (permalink / raw)

---
 src/backend/executor/nodeBitmapHeapscan.c | 21 ++++++---------------
 1 file changed, 6 insertions(+), 15 deletions(-)

diff --git a/src/backend/executor/nodeBitmapHeapscan.c b/src/backend/executor/nodeBitmapHeapscan.c
index 83d6478bc2b..f2bb487bf10 100644
--- a/src/backend/executor/nodeBitmapHeapscan.c
+++ b/src/backend/executor/nodeBitmapHeapscan.c
@@ -79,7 +79,6 @@ typedef enum
 /* ----------------
  *	 ParallelBitmapHeapState information
  *		tbmiterator				iterator for scanning current pages
- *		mutex					mutual exclusion for state
  *		state					current state of the TIDBitmap
  *		cv						conditional wait variable
  * ----------------
@@ -87,8 +86,7 @@ typedef enum
 typedef struct ParallelBitmapHeapState
 {
 	dsa_pointer tbmiterator;
-	slock_t		mutex;
-	SharedBitmapState state;
+	pg_atomic_uint32 state;
 	ConditionVariable cv;
 } ParallelBitmapHeapState;
 
@@ -228,9 +226,7 @@ BitmapHeapNext(BitmapHeapScanState *node)
 static inline void
 BitmapDoneInitializingSharedState(ParallelBitmapHeapState *pstate)
 {
-	SpinLockAcquire(&pstate->mutex);
-	pstate->state = BM_FINISHED;
-	SpinLockRelease(&pstate->mutex);
+	pg_atomic_write_membarrier_u32(&pstate->state, BM_FINISHED);
 	ConditionVariableBroadcast(&pstate->cv);
 }
 
@@ -480,11 +476,8 @@ BitmapShouldInitializeSharedState(ParallelBitmapHeapState *pstate)
 
 	while (1)
 	{
-		SpinLockAcquire(&pstate->mutex);
-		state = pstate->state;
-		if (pstate->state == BM_INITIAL)
-			pstate->state = BM_INPROGRESS;
-		SpinLockRelease(&pstate->mutex);
+		state = BM_INITIAL;
+		pg_atomic_compare_exchange_u32(&pstate->state, &state, BM_INPROGRESS);
 
 		/* Exit if bitmap is done, or if we're the leader. */
 		if (state != BM_INPROGRESS)
@@ -538,9 +531,7 @@ ExecBitmapHeapInitializeDSM(BitmapHeapScanState *node,
 
 	pstate->tbmiterator = 0;
 
-	/* Initialize the mutex */
-	SpinLockInit(&pstate->mutex);
-	pstate->state = BM_INITIAL;
+	pg_atomic_init_u32(&pstate->state, BM_INITIAL);
 
 	ConditionVariableInit(&pstate->cv);
 
@@ -565,7 +556,7 @@ ExecBitmapHeapReInitializeDSM(BitmapHeapScanState *node,
 	if (dsa == NULL)
 		return;
 
-	pstate->state = BM_INITIAL;
+	pg_atomic_write_u32(&pstate->state, BM_INITIAL);
 
 	if (DsaPointerIsValid(pstate->tbmiterator))
 		tbm_free_shared_area(dsa, pstate->tbmiterator);
-- 
2.50.1 (Apple Git-155)


--Ot5x3ffkWEuxilWO
Content-Type: text/plain; charset=us-ascii
Content-Disposition: attachment;
	filename=v1-0003-convert-FixedParallelState-last_xlog_end-to-an-at.patch



^ permalink  raw  reply  [nested|flat] 440+ messages in thread

* [PATCH v1 2/8] convert ParallelBitmapHeapState->state to an atomic
@ 2026-07-09 18:38 Nathan Bossart <nathan@postgresql.org>
  0 siblings, 0 replies; 440+ messages in thread

From: Nathan Bossart @ 2026-07-09 18:38 UTC (permalink / raw)

---
 src/backend/executor/nodeBitmapHeapscan.c | 21 ++++++---------------
 1 file changed, 6 insertions(+), 15 deletions(-)

diff --git a/src/backend/executor/nodeBitmapHeapscan.c b/src/backend/executor/nodeBitmapHeapscan.c
index 83d6478bc2b..f2bb487bf10 100644
--- a/src/backend/executor/nodeBitmapHeapscan.c
+++ b/src/backend/executor/nodeBitmapHeapscan.c
@@ -79,7 +79,6 @@ typedef enum
 /* ----------------
  *	 ParallelBitmapHeapState information
  *		tbmiterator				iterator for scanning current pages
- *		mutex					mutual exclusion for state
  *		state					current state of the TIDBitmap
  *		cv						conditional wait variable
  * ----------------
@@ -87,8 +86,7 @@ typedef enum
 typedef struct ParallelBitmapHeapState
 {
 	dsa_pointer tbmiterator;
-	slock_t		mutex;
-	SharedBitmapState state;
+	pg_atomic_uint32 state;
 	ConditionVariable cv;
 } ParallelBitmapHeapState;
 
@@ -228,9 +226,7 @@ BitmapHeapNext(BitmapHeapScanState *node)
 static inline void
 BitmapDoneInitializingSharedState(ParallelBitmapHeapState *pstate)
 {
-	SpinLockAcquire(&pstate->mutex);
-	pstate->state = BM_FINISHED;
-	SpinLockRelease(&pstate->mutex);
+	pg_atomic_write_membarrier_u32(&pstate->state, BM_FINISHED);
 	ConditionVariableBroadcast(&pstate->cv);
 }
 
@@ -480,11 +476,8 @@ BitmapShouldInitializeSharedState(ParallelBitmapHeapState *pstate)
 
 	while (1)
 	{
-		SpinLockAcquire(&pstate->mutex);
-		state = pstate->state;
-		if (pstate->state == BM_INITIAL)
-			pstate->state = BM_INPROGRESS;
-		SpinLockRelease(&pstate->mutex);
+		state = BM_INITIAL;
+		pg_atomic_compare_exchange_u32(&pstate->state, &state, BM_INPROGRESS);
 
 		/* Exit if bitmap is done, or if we're the leader. */
 		if (state != BM_INPROGRESS)
@@ -538,9 +531,7 @@ ExecBitmapHeapInitializeDSM(BitmapHeapScanState *node,
 
 	pstate->tbmiterator = 0;
 
-	/* Initialize the mutex */
-	SpinLockInit(&pstate->mutex);
-	pstate->state = BM_INITIAL;
+	pg_atomic_init_u32(&pstate->state, BM_INITIAL);
 
 	ConditionVariableInit(&pstate->cv);
 
@@ -565,7 +556,7 @@ ExecBitmapHeapReInitializeDSM(BitmapHeapScanState *node,
 	if (dsa == NULL)
 		return;
 
-	pstate->state = BM_INITIAL;
+	pg_atomic_write_u32(&pstate->state, BM_INITIAL);
 
 	if (DsaPointerIsValid(pstate->tbmiterator))
 		tbm_free_shared_area(dsa, pstate->tbmiterator);
-- 
2.50.1 (Apple Git-155)


--Ot5x3ffkWEuxilWO
Content-Type: text/plain; charset=us-ascii
Content-Disposition: attachment;
	filename=v1-0003-convert-FixedParallelState-last_xlog_end-to-an-at.patch



^ permalink  raw  reply  [nested|flat] 440+ messages in thread

* [PATCH v1 2/8] convert ParallelBitmapHeapState->state to an atomic
@ 2026-07-09 18:38 Nathan Bossart <nathan@postgresql.org>
  0 siblings, 0 replies; 440+ messages in thread

From: Nathan Bossart @ 2026-07-09 18:38 UTC (permalink / raw)

---
 src/backend/executor/nodeBitmapHeapscan.c | 21 ++++++---------------
 1 file changed, 6 insertions(+), 15 deletions(-)

diff --git a/src/backend/executor/nodeBitmapHeapscan.c b/src/backend/executor/nodeBitmapHeapscan.c
index 83d6478bc2b..f2bb487bf10 100644
--- a/src/backend/executor/nodeBitmapHeapscan.c
+++ b/src/backend/executor/nodeBitmapHeapscan.c
@@ -79,7 +79,6 @@ typedef enum
 /* ----------------
  *	 ParallelBitmapHeapState information
  *		tbmiterator				iterator for scanning current pages
- *		mutex					mutual exclusion for state
  *		state					current state of the TIDBitmap
  *		cv						conditional wait variable
  * ----------------
@@ -87,8 +86,7 @@ typedef enum
 typedef struct ParallelBitmapHeapState
 {
 	dsa_pointer tbmiterator;
-	slock_t		mutex;
-	SharedBitmapState state;
+	pg_atomic_uint32 state;
 	ConditionVariable cv;
 } ParallelBitmapHeapState;
 
@@ -228,9 +226,7 @@ BitmapHeapNext(BitmapHeapScanState *node)
 static inline void
 BitmapDoneInitializingSharedState(ParallelBitmapHeapState *pstate)
 {
-	SpinLockAcquire(&pstate->mutex);
-	pstate->state = BM_FINISHED;
-	SpinLockRelease(&pstate->mutex);
+	pg_atomic_write_membarrier_u32(&pstate->state, BM_FINISHED);
 	ConditionVariableBroadcast(&pstate->cv);
 }
 
@@ -480,11 +476,8 @@ BitmapShouldInitializeSharedState(ParallelBitmapHeapState *pstate)
 
 	while (1)
 	{
-		SpinLockAcquire(&pstate->mutex);
-		state = pstate->state;
-		if (pstate->state == BM_INITIAL)
-			pstate->state = BM_INPROGRESS;
-		SpinLockRelease(&pstate->mutex);
+		state = BM_INITIAL;
+		pg_atomic_compare_exchange_u32(&pstate->state, &state, BM_INPROGRESS);
 
 		/* Exit if bitmap is done, or if we're the leader. */
 		if (state != BM_INPROGRESS)
@@ -538,9 +531,7 @@ ExecBitmapHeapInitializeDSM(BitmapHeapScanState *node,
 
 	pstate->tbmiterator = 0;
 
-	/* Initialize the mutex */
-	SpinLockInit(&pstate->mutex);
-	pstate->state = BM_INITIAL;
+	pg_atomic_init_u32(&pstate->state, BM_INITIAL);
 
 	ConditionVariableInit(&pstate->cv);
 
@@ -565,7 +556,7 @@ ExecBitmapHeapReInitializeDSM(BitmapHeapScanState *node,
 	if (dsa == NULL)
 		return;
 
-	pstate->state = BM_INITIAL;
+	pg_atomic_write_u32(&pstate->state, BM_INITIAL);
 
 	if (DsaPointerIsValid(pstate->tbmiterator))
 		tbm_free_shared_area(dsa, pstate->tbmiterator);
-- 
2.50.1 (Apple Git-155)


--Ot5x3ffkWEuxilWO
Content-Type: text/plain; charset=us-ascii
Content-Disposition: attachment;
	filename=v1-0003-convert-FixedParallelState-last_xlog_end-to-an-at.patch



^ permalink  raw  reply  [nested|flat] 440+ messages in thread

* [PATCH v1 2/8] convert ParallelBitmapHeapState->state to an atomic
@ 2026-07-09 18:38 Nathan Bossart <nathan@postgresql.org>
  0 siblings, 0 replies; 440+ messages in thread

From: Nathan Bossart @ 2026-07-09 18:38 UTC (permalink / raw)

---
 src/backend/executor/nodeBitmapHeapscan.c | 21 ++++++---------------
 1 file changed, 6 insertions(+), 15 deletions(-)

diff --git a/src/backend/executor/nodeBitmapHeapscan.c b/src/backend/executor/nodeBitmapHeapscan.c
index 83d6478bc2b..f2bb487bf10 100644
--- a/src/backend/executor/nodeBitmapHeapscan.c
+++ b/src/backend/executor/nodeBitmapHeapscan.c
@@ -79,7 +79,6 @@ typedef enum
 /* ----------------
  *	 ParallelBitmapHeapState information
  *		tbmiterator				iterator for scanning current pages
- *		mutex					mutual exclusion for state
  *		state					current state of the TIDBitmap
  *		cv						conditional wait variable
  * ----------------
@@ -87,8 +86,7 @@ typedef enum
 typedef struct ParallelBitmapHeapState
 {
 	dsa_pointer tbmiterator;
-	slock_t		mutex;
-	SharedBitmapState state;
+	pg_atomic_uint32 state;
 	ConditionVariable cv;
 } ParallelBitmapHeapState;
 
@@ -228,9 +226,7 @@ BitmapHeapNext(BitmapHeapScanState *node)
 static inline void
 BitmapDoneInitializingSharedState(ParallelBitmapHeapState *pstate)
 {
-	SpinLockAcquire(&pstate->mutex);
-	pstate->state = BM_FINISHED;
-	SpinLockRelease(&pstate->mutex);
+	pg_atomic_write_membarrier_u32(&pstate->state, BM_FINISHED);
 	ConditionVariableBroadcast(&pstate->cv);
 }
 
@@ -480,11 +476,8 @@ BitmapShouldInitializeSharedState(ParallelBitmapHeapState *pstate)
 
 	while (1)
 	{
-		SpinLockAcquire(&pstate->mutex);
-		state = pstate->state;
-		if (pstate->state == BM_INITIAL)
-			pstate->state = BM_INPROGRESS;
-		SpinLockRelease(&pstate->mutex);
+		state = BM_INITIAL;
+		pg_atomic_compare_exchange_u32(&pstate->state, &state, BM_INPROGRESS);
 
 		/* Exit if bitmap is done, or if we're the leader. */
 		if (state != BM_INPROGRESS)
@@ -538,9 +531,7 @@ ExecBitmapHeapInitializeDSM(BitmapHeapScanState *node,
 
 	pstate->tbmiterator = 0;
 
-	/* Initialize the mutex */
-	SpinLockInit(&pstate->mutex);
-	pstate->state = BM_INITIAL;
+	pg_atomic_init_u32(&pstate->state, BM_INITIAL);
 
 	ConditionVariableInit(&pstate->cv);
 
@@ -565,7 +556,7 @@ ExecBitmapHeapReInitializeDSM(BitmapHeapScanState *node,
 	if (dsa == NULL)
 		return;
 
-	pstate->state = BM_INITIAL;
+	pg_atomic_write_u32(&pstate->state, BM_INITIAL);
 
 	if (DsaPointerIsValid(pstate->tbmiterator))
 		tbm_free_shared_area(dsa, pstate->tbmiterator);
-- 
2.50.1 (Apple Git-155)


--Ot5x3ffkWEuxilWO
Content-Type: text/plain; charset=us-ascii
Content-Disposition: attachment;
	filename=v1-0003-convert-FixedParallelState-last_xlog_end-to-an-at.patch



^ permalink  raw  reply  [nested|flat] 440+ messages in thread

* [PATCH v1 2/8] convert ParallelBitmapHeapState->state to an atomic
@ 2026-07-09 18:38 Nathan Bossart <nathan@postgresql.org>
  0 siblings, 0 replies; 440+ messages in thread

From: Nathan Bossart @ 2026-07-09 18:38 UTC (permalink / raw)

---
 src/backend/executor/nodeBitmapHeapscan.c | 21 ++++++---------------
 1 file changed, 6 insertions(+), 15 deletions(-)

diff --git a/src/backend/executor/nodeBitmapHeapscan.c b/src/backend/executor/nodeBitmapHeapscan.c
index 83d6478bc2b..f2bb487bf10 100644
--- a/src/backend/executor/nodeBitmapHeapscan.c
+++ b/src/backend/executor/nodeBitmapHeapscan.c
@@ -79,7 +79,6 @@ typedef enum
 /* ----------------
  *	 ParallelBitmapHeapState information
  *		tbmiterator				iterator for scanning current pages
- *		mutex					mutual exclusion for state
  *		state					current state of the TIDBitmap
  *		cv						conditional wait variable
  * ----------------
@@ -87,8 +86,7 @@ typedef enum
 typedef struct ParallelBitmapHeapState
 {
 	dsa_pointer tbmiterator;
-	slock_t		mutex;
-	SharedBitmapState state;
+	pg_atomic_uint32 state;
 	ConditionVariable cv;
 } ParallelBitmapHeapState;
 
@@ -228,9 +226,7 @@ BitmapHeapNext(BitmapHeapScanState *node)
 static inline void
 BitmapDoneInitializingSharedState(ParallelBitmapHeapState *pstate)
 {
-	SpinLockAcquire(&pstate->mutex);
-	pstate->state = BM_FINISHED;
-	SpinLockRelease(&pstate->mutex);
+	pg_atomic_write_membarrier_u32(&pstate->state, BM_FINISHED);
 	ConditionVariableBroadcast(&pstate->cv);
 }
 
@@ -480,11 +476,8 @@ BitmapShouldInitializeSharedState(ParallelBitmapHeapState *pstate)
 
 	while (1)
 	{
-		SpinLockAcquire(&pstate->mutex);
-		state = pstate->state;
-		if (pstate->state == BM_INITIAL)
-			pstate->state = BM_INPROGRESS;
-		SpinLockRelease(&pstate->mutex);
+		state = BM_INITIAL;
+		pg_atomic_compare_exchange_u32(&pstate->state, &state, BM_INPROGRESS);
 
 		/* Exit if bitmap is done, or if we're the leader. */
 		if (state != BM_INPROGRESS)
@@ -538,9 +531,7 @@ ExecBitmapHeapInitializeDSM(BitmapHeapScanState *node,
 
 	pstate->tbmiterator = 0;
 
-	/* Initialize the mutex */
-	SpinLockInit(&pstate->mutex);
-	pstate->state = BM_INITIAL;
+	pg_atomic_init_u32(&pstate->state, BM_INITIAL);
 
 	ConditionVariableInit(&pstate->cv);
 
@@ -565,7 +556,7 @@ ExecBitmapHeapReInitializeDSM(BitmapHeapScanState *node,
 	if (dsa == NULL)
 		return;
 
-	pstate->state = BM_INITIAL;
+	pg_atomic_write_u32(&pstate->state, BM_INITIAL);
 
 	if (DsaPointerIsValid(pstate->tbmiterator))
 		tbm_free_shared_area(dsa, pstate->tbmiterator);
-- 
2.50.1 (Apple Git-155)


--Ot5x3ffkWEuxilWO
Content-Type: text/plain; charset=us-ascii
Content-Disposition: attachment;
	filename=v1-0003-convert-FixedParallelState-last_xlog_end-to-an-at.patch



^ permalink  raw  reply  [nested|flat] 440+ messages in thread

* [PATCH v1 2/8] convert ParallelBitmapHeapState->state to an atomic
@ 2026-07-09 18:38 Nathan Bossart <nathan@postgresql.org>
  0 siblings, 0 replies; 440+ messages in thread

From: Nathan Bossart @ 2026-07-09 18:38 UTC (permalink / raw)

---
 src/backend/executor/nodeBitmapHeapscan.c | 21 ++++++---------------
 1 file changed, 6 insertions(+), 15 deletions(-)

diff --git a/src/backend/executor/nodeBitmapHeapscan.c b/src/backend/executor/nodeBitmapHeapscan.c
index 83d6478bc2b..f2bb487bf10 100644
--- a/src/backend/executor/nodeBitmapHeapscan.c
+++ b/src/backend/executor/nodeBitmapHeapscan.c
@@ -79,7 +79,6 @@ typedef enum
 /* ----------------
  *	 ParallelBitmapHeapState information
  *		tbmiterator				iterator for scanning current pages
- *		mutex					mutual exclusion for state
  *		state					current state of the TIDBitmap
  *		cv						conditional wait variable
  * ----------------
@@ -87,8 +86,7 @@ typedef enum
 typedef struct ParallelBitmapHeapState
 {
 	dsa_pointer tbmiterator;
-	slock_t		mutex;
-	SharedBitmapState state;
+	pg_atomic_uint32 state;
 	ConditionVariable cv;
 } ParallelBitmapHeapState;
 
@@ -228,9 +226,7 @@ BitmapHeapNext(BitmapHeapScanState *node)
 static inline void
 BitmapDoneInitializingSharedState(ParallelBitmapHeapState *pstate)
 {
-	SpinLockAcquire(&pstate->mutex);
-	pstate->state = BM_FINISHED;
-	SpinLockRelease(&pstate->mutex);
+	pg_atomic_write_membarrier_u32(&pstate->state, BM_FINISHED);
 	ConditionVariableBroadcast(&pstate->cv);
 }
 
@@ -480,11 +476,8 @@ BitmapShouldInitializeSharedState(ParallelBitmapHeapState *pstate)
 
 	while (1)
 	{
-		SpinLockAcquire(&pstate->mutex);
-		state = pstate->state;
-		if (pstate->state == BM_INITIAL)
-			pstate->state = BM_INPROGRESS;
-		SpinLockRelease(&pstate->mutex);
+		state = BM_INITIAL;
+		pg_atomic_compare_exchange_u32(&pstate->state, &state, BM_INPROGRESS);
 
 		/* Exit if bitmap is done, or if we're the leader. */
 		if (state != BM_INPROGRESS)
@@ -538,9 +531,7 @@ ExecBitmapHeapInitializeDSM(BitmapHeapScanState *node,
 
 	pstate->tbmiterator = 0;
 
-	/* Initialize the mutex */
-	SpinLockInit(&pstate->mutex);
-	pstate->state = BM_INITIAL;
+	pg_atomic_init_u32(&pstate->state, BM_INITIAL);
 
 	ConditionVariableInit(&pstate->cv);
 
@@ -565,7 +556,7 @@ ExecBitmapHeapReInitializeDSM(BitmapHeapScanState *node,
 	if (dsa == NULL)
 		return;
 
-	pstate->state = BM_INITIAL;
+	pg_atomic_write_u32(&pstate->state, BM_INITIAL);
 
 	if (DsaPointerIsValid(pstate->tbmiterator))
 		tbm_free_shared_area(dsa, pstate->tbmiterator);
-- 
2.50.1 (Apple Git-155)


--Ot5x3ffkWEuxilWO
Content-Type: text/plain; charset=us-ascii
Content-Disposition: attachment;
	filename=v1-0003-convert-FixedParallelState-last_xlog_end-to-an-at.patch



^ permalink  raw  reply  [nested|flat] 440+ messages in thread

* [PATCH v2 2/9] convert ParallelBitmapHeapState->state to an atomic
@ 2026-07-09 18:38 Nathan Bossart <nathan@postgresql.org>
  0 siblings, 0 replies; 440+ messages in thread

From: Nathan Bossart @ 2026-07-09 18:38 UTC (permalink / raw)

---
 src/backend/executor/nodeBitmapHeapscan.c | 23 +++++++----------------
 1 file changed, 7 insertions(+), 16 deletions(-)

diff --git a/src/backend/executor/nodeBitmapHeapscan.c b/src/backend/executor/nodeBitmapHeapscan.c
index 83d6478bc2b..a9e83f30687 100644
--- a/src/backend/executor/nodeBitmapHeapscan.c
+++ b/src/backend/executor/nodeBitmapHeapscan.c
@@ -79,7 +79,6 @@ typedef enum
 /* ----------------
  *	 ParallelBitmapHeapState information
  *		tbmiterator				iterator for scanning current pages
- *		mutex					mutual exclusion for state
  *		state					current state of the TIDBitmap
  *		cv						conditional wait variable
  * ----------------
@@ -87,8 +86,7 @@ typedef enum
 typedef struct ParallelBitmapHeapState
 {
 	dsa_pointer tbmiterator;
-	slock_t		mutex;
-	SharedBitmapState state;
+	pg_atomic_uint32 state;
 	ConditionVariable cv;
 } ParallelBitmapHeapState;
 
@@ -228,9 +226,7 @@ BitmapHeapNext(BitmapHeapScanState *node)
 static inline void
 BitmapDoneInitializingSharedState(ParallelBitmapHeapState *pstate)
 {
-	SpinLockAcquire(&pstate->mutex);
-	pstate->state = BM_FINISHED;
-	SpinLockRelease(&pstate->mutex);
+	pg_atomic_write_membarrier_u32(&pstate->state, BM_FINISHED);
 	ConditionVariableBroadcast(&pstate->cv);
 }
 
@@ -476,15 +472,12 @@ ExecInitBitmapHeapScan(BitmapHeapScan *node, EState *estate, int eflags)
 static bool
 BitmapShouldInitializeSharedState(ParallelBitmapHeapState *pstate)
 {
-	SharedBitmapState state;
+	uint32		state;
 
 	while (1)
 	{
-		SpinLockAcquire(&pstate->mutex);
-		state = pstate->state;
-		if (pstate->state == BM_INITIAL)
-			pstate->state = BM_INPROGRESS;
-		SpinLockRelease(&pstate->mutex);
+		state = BM_INITIAL;
+		pg_atomic_compare_exchange_u32(&pstate->state, &state, BM_INPROGRESS);
 
 		/* Exit if bitmap is done, or if we're the leader. */
 		if (state != BM_INPROGRESS)
@@ -538,9 +531,7 @@ ExecBitmapHeapInitializeDSM(BitmapHeapScanState *node,
 
 	pstate->tbmiterator = 0;
 
-	/* Initialize the mutex */
-	SpinLockInit(&pstate->mutex);
-	pstate->state = BM_INITIAL;
+	pg_atomic_init_u32(&pstate->state, BM_INITIAL);
 
 	ConditionVariableInit(&pstate->cv);
 
@@ -565,7 +556,7 @@ ExecBitmapHeapReInitializeDSM(BitmapHeapScanState *node,
 	if (dsa == NULL)
 		return;
 
-	pstate->state = BM_INITIAL;
+	pg_atomic_write_u32(&pstate->state, BM_INITIAL);
 
 	if (DsaPointerIsValid(pstate->tbmiterator))
 		tbm_free_shared_area(dsa, pstate->tbmiterator);
-- 
2.50.1 (Apple Git-155)


--Xf36GNcW+0xZNily
Content-Type: text/plain; charset=us-ascii
Content-Disposition: attachment;
	filename=v2-0003-convert-FixedParallelState-last_xlog_end-to-an-at.patch



^ permalink  raw  reply  [nested|flat] 440+ messages in thread

* [PATCH v2 2/9] convert ParallelBitmapHeapState->state to an atomic
@ 2026-07-09 18:38 Nathan Bossart <nathan@postgresql.org>
  0 siblings, 0 replies; 440+ messages in thread

From: Nathan Bossart @ 2026-07-09 18:38 UTC (permalink / raw)

---
 src/backend/executor/nodeBitmapHeapscan.c | 23 +++++++----------------
 1 file changed, 7 insertions(+), 16 deletions(-)

diff --git a/src/backend/executor/nodeBitmapHeapscan.c b/src/backend/executor/nodeBitmapHeapscan.c
index 83d6478bc2b..a9e83f30687 100644
--- a/src/backend/executor/nodeBitmapHeapscan.c
+++ b/src/backend/executor/nodeBitmapHeapscan.c
@@ -79,7 +79,6 @@ typedef enum
 /* ----------------
  *	 ParallelBitmapHeapState information
  *		tbmiterator				iterator for scanning current pages
- *		mutex					mutual exclusion for state
  *		state					current state of the TIDBitmap
  *		cv						conditional wait variable
  * ----------------
@@ -87,8 +86,7 @@ typedef enum
 typedef struct ParallelBitmapHeapState
 {
 	dsa_pointer tbmiterator;
-	slock_t		mutex;
-	SharedBitmapState state;
+	pg_atomic_uint32 state;
 	ConditionVariable cv;
 } ParallelBitmapHeapState;
 
@@ -228,9 +226,7 @@ BitmapHeapNext(BitmapHeapScanState *node)
 static inline void
 BitmapDoneInitializingSharedState(ParallelBitmapHeapState *pstate)
 {
-	SpinLockAcquire(&pstate->mutex);
-	pstate->state = BM_FINISHED;
-	SpinLockRelease(&pstate->mutex);
+	pg_atomic_write_membarrier_u32(&pstate->state, BM_FINISHED);
 	ConditionVariableBroadcast(&pstate->cv);
 }
 
@@ -476,15 +472,12 @@ ExecInitBitmapHeapScan(BitmapHeapScan *node, EState *estate, int eflags)
 static bool
 BitmapShouldInitializeSharedState(ParallelBitmapHeapState *pstate)
 {
-	SharedBitmapState state;
+	uint32		state;
 
 	while (1)
 	{
-		SpinLockAcquire(&pstate->mutex);
-		state = pstate->state;
-		if (pstate->state == BM_INITIAL)
-			pstate->state = BM_INPROGRESS;
-		SpinLockRelease(&pstate->mutex);
+		state = BM_INITIAL;
+		pg_atomic_compare_exchange_u32(&pstate->state, &state, BM_INPROGRESS);
 
 		/* Exit if bitmap is done, or if we're the leader. */
 		if (state != BM_INPROGRESS)
@@ -538,9 +531,7 @@ ExecBitmapHeapInitializeDSM(BitmapHeapScanState *node,
 
 	pstate->tbmiterator = 0;
 
-	/* Initialize the mutex */
-	SpinLockInit(&pstate->mutex);
-	pstate->state = BM_INITIAL;
+	pg_atomic_init_u32(&pstate->state, BM_INITIAL);
 
 	ConditionVariableInit(&pstate->cv);
 
@@ -565,7 +556,7 @@ ExecBitmapHeapReInitializeDSM(BitmapHeapScanState *node,
 	if (dsa == NULL)
 		return;
 
-	pstate->state = BM_INITIAL;
+	pg_atomic_write_u32(&pstate->state, BM_INITIAL);
 
 	if (DsaPointerIsValid(pstate->tbmiterator))
 		tbm_free_shared_area(dsa, pstate->tbmiterator);
-- 
2.50.1 (Apple Git-155)


--Xf36GNcW+0xZNily
Content-Type: text/plain; charset=us-ascii
Content-Disposition: attachment;
	filename=v2-0003-convert-FixedParallelState-last_xlog_end-to-an-at.patch



^ permalink  raw  reply  [nested|flat] 440+ messages in thread

* [PATCH v1 2/8] convert ParallelBitmapHeapState->state to an atomic
@ 2026-07-09 18:38 Nathan Bossart <nathan@postgresql.org>
  0 siblings, 0 replies; 440+ messages in thread

From: Nathan Bossart @ 2026-07-09 18:38 UTC (permalink / raw)

---
 src/backend/executor/nodeBitmapHeapscan.c | 21 ++++++---------------
 1 file changed, 6 insertions(+), 15 deletions(-)

diff --git a/src/backend/executor/nodeBitmapHeapscan.c b/src/backend/executor/nodeBitmapHeapscan.c
index 83d6478bc2b..f2bb487bf10 100644
--- a/src/backend/executor/nodeBitmapHeapscan.c
+++ b/src/backend/executor/nodeBitmapHeapscan.c
@@ -79,7 +79,6 @@ typedef enum
 /* ----------------
  *	 ParallelBitmapHeapState information
  *		tbmiterator				iterator for scanning current pages
- *		mutex					mutual exclusion for state
  *		state					current state of the TIDBitmap
  *		cv						conditional wait variable
  * ----------------
@@ -87,8 +86,7 @@ typedef enum
 typedef struct ParallelBitmapHeapState
 {
 	dsa_pointer tbmiterator;
-	slock_t		mutex;
-	SharedBitmapState state;
+	pg_atomic_uint32 state;
 	ConditionVariable cv;
 } ParallelBitmapHeapState;
 
@@ -228,9 +226,7 @@ BitmapHeapNext(BitmapHeapScanState *node)
 static inline void
 BitmapDoneInitializingSharedState(ParallelBitmapHeapState *pstate)
 {
-	SpinLockAcquire(&pstate->mutex);
-	pstate->state = BM_FINISHED;
-	SpinLockRelease(&pstate->mutex);
+	pg_atomic_write_membarrier_u32(&pstate->state, BM_FINISHED);
 	ConditionVariableBroadcast(&pstate->cv);
 }
 
@@ -480,11 +476,8 @@ BitmapShouldInitializeSharedState(ParallelBitmapHeapState *pstate)
 
 	while (1)
 	{
-		SpinLockAcquire(&pstate->mutex);
-		state = pstate->state;
-		if (pstate->state == BM_INITIAL)
-			pstate->state = BM_INPROGRESS;
-		SpinLockRelease(&pstate->mutex);
+		state = BM_INITIAL;
+		pg_atomic_compare_exchange_u32(&pstate->state, &state, BM_INPROGRESS);
 
 		/* Exit if bitmap is done, or if we're the leader. */
 		if (state != BM_INPROGRESS)
@@ -538,9 +531,7 @@ ExecBitmapHeapInitializeDSM(BitmapHeapScanState *node,
 
 	pstate->tbmiterator = 0;
 
-	/* Initialize the mutex */
-	SpinLockInit(&pstate->mutex);
-	pstate->state = BM_INITIAL;
+	pg_atomic_init_u32(&pstate->state, BM_INITIAL);
 
 	ConditionVariableInit(&pstate->cv);
 
@@ -565,7 +556,7 @@ ExecBitmapHeapReInitializeDSM(BitmapHeapScanState *node,
 	if (dsa == NULL)
 		return;
 
-	pstate->state = BM_INITIAL;
+	pg_atomic_write_u32(&pstate->state, BM_INITIAL);
 
 	if (DsaPointerIsValid(pstate->tbmiterator))
 		tbm_free_shared_area(dsa, pstate->tbmiterator);
-- 
2.50.1 (Apple Git-155)


--Ot5x3ffkWEuxilWO
Content-Type: text/plain; charset=us-ascii
Content-Disposition: attachment;
	filename=v1-0003-convert-FixedParallelState-last_xlog_end-to-an-at.patch



^ permalink  raw  reply  [nested|flat] 440+ messages in thread

* [PATCH v1 2/8] convert ParallelBitmapHeapState->state to an atomic
@ 2026-07-09 18:38 Nathan Bossart <nathan@postgresql.org>
  0 siblings, 0 replies; 440+ messages in thread

From: Nathan Bossart @ 2026-07-09 18:38 UTC (permalink / raw)

---
 src/backend/executor/nodeBitmapHeapscan.c | 21 ++++++---------------
 1 file changed, 6 insertions(+), 15 deletions(-)

diff --git a/src/backend/executor/nodeBitmapHeapscan.c b/src/backend/executor/nodeBitmapHeapscan.c
index 83d6478bc2b..f2bb487bf10 100644
--- a/src/backend/executor/nodeBitmapHeapscan.c
+++ b/src/backend/executor/nodeBitmapHeapscan.c
@@ -79,7 +79,6 @@ typedef enum
 /* ----------------
  *	 ParallelBitmapHeapState information
  *		tbmiterator				iterator for scanning current pages
- *		mutex					mutual exclusion for state
  *		state					current state of the TIDBitmap
  *		cv						conditional wait variable
  * ----------------
@@ -87,8 +86,7 @@ typedef enum
 typedef struct ParallelBitmapHeapState
 {
 	dsa_pointer tbmiterator;
-	slock_t		mutex;
-	SharedBitmapState state;
+	pg_atomic_uint32 state;
 	ConditionVariable cv;
 } ParallelBitmapHeapState;
 
@@ -228,9 +226,7 @@ BitmapHeapNext(BitmapHeapScanState *node)
 static inline void
 BitmapDoneInitializingSharedState(ParallelBitmapHeapState *pstate)
 {
-	SpinLockAcquire(&pstate->mutex);
-	pstate->state = BM_FINISHED;
-	SpinLockRelease(&pstate->mutex);
+	pg_atomic_write_membarrier_u32(&pstate->state, BM_FINISHED);
 	ConditionVariableBroadcast(&pstate->cv);
 }
 
@@ -480,11 +476,8 @@ BitmapShouldInitializeSharedState(ParallelBitmapHeapState *pstate)
 
 	while (1)
 	{
-		SpinLockAcquire(&pstate->mutex);
-		state = pstate->state;
-		if (pstate->state == BM_INITIAL)
-			pstate->state = BM_INPROGRESS;
-		SpinLockRelease(&pstate->mutex);
+		state = BM_INITIAL;
+		pg_atomic_compare_exchange_u32(&pstate->state, &state, BM_INPROGRESS);
 
 		/* Exit if bitmap is done, or if we're the leader. */
 		if (state != BM_INPROGRESS)
@@ -538,9 +531,7 @@ ExecBitmapHeapInitializeDSM(BitmapHeapScanState *node,
 
 	pstate->tbmiterator = 0;
 
-	/* Initialize the mutex */
-	SpinLockInit(&pstate->mutex);
-	pstate->state = BM_INITIAL;
+	pg_atomic_init_u32(&pstate->state, BM_INITIAL);
 
 	ConditionVariableInit(&pstate->cv);
 
@@ -565,7 +556,7 @@ ExecBitmapHeapReInitializeDSM(BitmapHeapScanState *node,
 	if (dsa == NULL)
 		return;
 
-	pstate->state = BM_INITIAL;
+	pg_atomic_write_u32(&pstate->state, BM_INITIAL);
 
 	if (DsaPointerIsValid(pstate->tbmiterator))
 		tbm_free_shared_area(dsa, pstate->tbmiterator);
-- 
2.50.1 (Apple Git-155)


--Ot5x3ffkWEuxilWO
Content-Type: text/plain; charset=us-ascii
Content-Disposition: attachment;
	filename=v1-0003-convert-FixedParallelState-last_xlog_end-to-an-at.patch



^ permalink  raw  reply  [nested|flat] 440+ messages in thread

* [PATCH v1 2/8] convert ParallelBitmapHeapState->state to an atomic
@ 2026-07-09 18:38 Nathan Bossart <nathan@postgresql.org>
  0 siblings, 0 replies; 440+ messages in thread

From: Nathan Bossart @ 2026-07-09 18:38 UTC (permalink / raw)

---
 src/backend/executor/nodeBitmapHeapscan.c | 21 ++++++---------------
 1 file changed, 6 insertions(+), 15 deletions(-)

diff --git a/src/backend/executor/nodeBitmapHeapscan.c b/src/backend/executor/nodeBitmapHeapscan.c
index 83d6478bc2b..f2bb487bf10 100644
--- a/src/backend/executor/nodeBitmapHeapscan.c
+++ b/src/backend/executor/nodeBitmapHeapscan.c
@@ -79,7 +79,6 @@ typedef enum
 /* ----------------
  *	 ParallelBitmapHeapState information
  *		tbmiterator				iterator for scanning current pages
- *		mutex					mutual exclusion for state
  *		state					current state of the TIDBitmap
  *		cv						conditional wait variable
  * ----------------
@@ -87,8 +86,7 @@ typedef enum
 typedef struct ParallelBitmapHeapState
 {
 	dsa_pointer tbmiterator;
-	slock_t		mutex;
-	SharedBitmapState state;
+	pg_atomic_uint32 state;
 	ConditionVariable cv;
 } ParallelBitmapHeapState;
 
@@ -228,9 +226,7 @@ BitmapHeapNext(BitmapHeapScanState *node)
 static inline void
 BitmapDoneInitializingSharedState(ParallelBitmapHeapState *pstate)
 {
-	SpinLockAcquire(&pstate->mutex);
-	pstate->state = BM_FINISHED;
-	SpinLockRelease(&pstate->mutex);
+	pg_atomic_write_membarrier_u32(&pstate->state, BM_FINISHED);
 	ConditionVariableBroadcast(&pstate->cv);
 }
 
@@ -480,11 +476,8 @@ BitmapShouldInitializeSharedState(ParallelBitmapHeapState *pstate)
 
 	while (1)
 	{
-		SpinLockAcquire(&pstate->mutex);
-		state = pstate->state;
-		if (pstate->state == BM_INITIAL)
-			pstate->state = BM_INPROGRESS;
-		SpinLockRelease(&pstate->mutex);
+		state = BM_INITIAL;
+		pg_atomic_compare_exchange_u32(&pstate->state, &state, BM_INPROGRESS);
 
 		/* Exit if bitmap is done, or if we're the leader. */
 		if (state != BM_INPROGRESS)
@@ -538,9 +531,7 @@ ExecBitmapHeapInitializeDSM(BitmapHeapScanState *node,
 
 	pstate->tbmiterator = 0;
 
-	/* Initialize the mutex */
-	SpinLockInit(&pstate->mutex);
-	pstate->state = BM_INITIAL;
+	pg_atomic_init_u32(&pstate->state, BM_INITIAL);
 
 	ConditionVariableInit(&pstate->cv);
 
@@ -565,7 +556,7 @@ ExecBitmapHeapReInitializeDSM(BitmapHeapScanState *node,
 	if (dsa == NULL)
 		return;
 
-	pstate->state = BM_INITIAL;
+	pg_atomic_write_u32(&pstate->state, BM_INITIAL);
 
 	if (DsaPointerIsValid(pstate->tbmiterator))
 		tbm_free_shared_area(dsa, pstate->tbmiterator);
-- 
2.50.1 (Apple Git-155)


--Ot5x3ffkWEuxilWO
Content-Type: text/plain; charset=us-ascii
Content-Disposition: attachment;
	filename=v1-0003-convert-FixedParallelState-last_xlog_end-to-an-at.patch



^ permalink  raw  reply  [nested|flat] 440+ messages in thread

* [PATCH v1 2/8] convert ParallelBitmapHeapState->state to an atomic
@ 2026-07-09 18:38 Nathan Bossart <nathan@postgresql.org>
  0 siblings, 0 replies; 440+ messages in thread

From: Nathan Bossart @ 2026-07-09 18:38 UTC (permalink / raw)

---
 src/backend/executor/nodeBitmapHeapscan.c | 21 ++++++---------------
 1 file changed, 6 insertions(+), 15 deletions(-)

diff --git a/src/backend/executor/nodeBitmapHeapscan.c b/src/backend/executor/nodeBitmapHeapscan.c
index 83d6478bc2b..f2bb487bf10 100644
--- a/src/backend/executor/nodeBitmapHeapscan.c
+++ b/src/backend/executor/nodeBitmapHeapscan.c
@@ -79,7 +79,6 @@ typedef enum
 /* ----------------
  *	 ParallelBitmapHeapState information
  *		tbmiterator				iterator for scanning current pages
- *		mutex					mutual exclusion for state
  *		state					current state of the TIDBitmap
  *		cv						conditional wait variable
  * ----------------
@@ -87,8 +86,7 @@ typedef enum
 typedef struct ParallelBitmapHeapState
 {
 	dsa_pointer tbmiterator;
-	slock_t		mutex;
-	SharedBitmapState state;
+	pg_atomic_uint32 state;
 	ConditionVariable cv;
 } ParallelBitmapHeapState;
 
@@ -228,9 +226,7 @@ BitmapHeapNext(BitmapHeapScanState *node)
 static inline void
 BitmapDoneInitializingSharedState(ParallelBitmapHeapState *pstate)
 {
-	SpinLockAcquire(&pstate->mutex);
-	pstate->state = BM_FINISHED;
-	SpinLockRelease(&pstate->mutex);
+	pg_atomic_write_membarrier_u32(&pstate->state, BM_FINISHED);
 	ConditionVariableBroadcast(&pstate->cv);
 }
 
@@ -480,11 +476,8 @@ BitmapShouldInitializeSharedState(ParallelBitmapHeapState *pstate)
 
 	while (1)
 	{
-		SpinLockAcquire(&pstate->mutex);
-		state = pstate->state;
-		if (pstate->state == BM_INITIAL)
-			pstate->state = BM_INPROGRESS;
-		SpinLockRelease(&pstate->mutex);
+		state = BM_INITIAL;
+		pg_atomic_compare_exchange_u32(&pstate->state, &state, BM_INPROGRESS);
 
 		/* Exit if bitmap is done, or if we're the leader. */
 		if (state != BM_INPROGRESS)
@@ -538,9 +531,7 @@ ExecBitmapHeapInitializeDSM(BitmapHeapScanState *node,
 
 	pstate->tbmiterator = 0;
 
-	/* Initialize the mutex */
-	SpinLockInit(&pstate->mutex);
-	pstate->state = BM_INITIAL;
+	pg_atomic_init_u32(&pstate->state, BM_INITIAL);
 
 	ConditionVariableInit(&pstate->cv);
 
@@ -565,7 +556,7 @@ ExecBitmapHeapReInitializeDSM(BitmapHeapScanState *node,
 	if (dsa == NULL)
 		return;
 
-	pstate->state = BM_INITIAL;
+	pg_atomic_write_u32(&pstate->state, BM_INITIAL);
 
 	if (DsaPointerIsValid(pstate->tbmiterator))
 		tbm_free_shared_area(dsa, pstate->tbmiterator);
-- 
2.50.1 (Apple Git-155)


--Ot5x3ffkWEuxilWO
Content-Type: text/plain; charset=us-ascii
Content-Disposition: attachment;
	filename=v1-0003-convert-FixedParallelState-last_xlog_end-to-an-at.patch



^ permalink  raw  reply  [nested|flat] 440+ messages in thread

* [PATCH v1 2/8] convert ParallelBitmapHeapState->state to an atomic
@ 2026-07-09 18:38 Nathan Bossart <nathan@postgresql.org>
  0 siblings, 0 replies; 440+ messages in thread

From: Nathan Bossart @ 2026-07-09 18:38 UTC (permalink / raw)

---
 src/backend/executor/nodeBitmapHeapscan.c | 21 ++++++---------------
 1 file changed, 6 insertions(+), 15 deletions(-)

diff --git a/src/backend/executor/nodeBitmapHeapscan.c b/src/backend/executor/nodeBitmapHeapscan.c
index 83d6478bc2b..f2bb487bf10 100644
--- a/src/backend/executor/nodeBitmapHeapscan.c
+++ b/src/backend/executor/nodeBitmapHeapscan.c
@@ -79,7 +79,6 @@ typedef enum
 /* ----------------
  *	 ParallelBitmapHeapState information
  *		tbmiterator				iterator for scanning current pages
- *		mutex					mutual exclusion for state
  *		state					current state of the TIDBitmap
  *		cv						conditional wait variable
  * ----------------
@@ -87,8 +86,7 @@ typedef enum
 typedef struct ParallelBitmapHeapState
 {
 	dsa_pointer tbmiterator;
-	slock_t		mutex;
-	SharedBitmapState state;
+	pg_atomic_uint32 state;
 	ConditionVariable cv;
 } ParallelBitmapHeapState;
 
@@ -228,9 +226,7 @@ BitmapHeapNext(BitmapHeapScanState *node)
 static inline void
 BitmapDoneInitializingSharedState(ParallelBitmapHeapState *pstate)
 {
-	SpinLockAcquire(&pstate->mutex);
-	pstate->state = BM_FINISHED;
-	SpinLockRelease(&pstate->mutex);
+	pg_atomic_write_membarrier_u32(&pstate->state, BM_FINISHED);
 	ConditionVariableBroadcast(&pstate->cv);
 }
 
@@ -480,11 +476,8 @@ BitmapShouldInitializeSharedState(ParallelBitmapHeapState *pstate)
 
 	while (1)
 	{
-		SpinLockAcquire(&pstate->mutex);
-		state = pstate->state;
-		if (pstate->state == BM_INITIAL)
-			pstate->state = BM_INPROGRESS;
-		SpinLockRelease(&pstate->mutex);
+		state = BM_INITIAL;
+		pg_atomic_compare_exchange_u32(&pstate->state, &state, BM_INPROGRESS);
 
 		/* Exit if bitmap is done, or if we're the leader. */
 		if (state != BM_INPROGRESS)
@@ -538,9 +531,7 @@ ExecBitmapHeapInitializeDSM(BitmapHeapScanState *node,
 
 	pstate->tbmiterator = 0;
 
-	/* Initialize the mutex */
-	SpinLockInit(&pstate->mutex);
-	pstate->state = BM_INITIAL;
+	pg_atomic_init_u32(&pstate->state, BM_INITIAL);
 
 	ConditionVariableInit(&pstate->cv);
 
@@ -565,7 +556,7 @@ ExecBitmapHeapReInitializeDSM(BitmapHeapScanState *node,
 	if (dsa == NULL)
 		return;
 
-	pstate->state = BM_INITIAL;
+	pg_atomic_write_u32(&pstate->state, BM_INITIAL);
 
 	if (DsaPointerIsValid(pstate->tbmiterator))
 		tbm_free_shared_area(dsa, pstate->tbmiterator);
-- 
2.50.1 (Apple Git-155)


--Ot5x3ffkWEuxilWO
Content-Type: text/plain; charset=us-ascii
Content-Disposition: attachment;
	filename=v1-0003-convert-FixedParallelState-last_xlog_end-to-an-at.patch



^ permalink  raw  reply  [nested|flat] 440+ messages in thread

* [PATCH v1 2/8] convert ParallelBitmapHeapState->state to an atomic
@ 2026-07-09 18:38 Nathan Bossart <nathan@postgresql.org>
  0 siblings, 0 replies; 440+ messages in thread

From: Nathan Bossart @ 2026-07-09 18:38 UTC (permalink / raw)

---
 src/backend/executor/nodeBitmapHeapscan.c | 21 ++++++---------------
 1 file changed, 6 insertions(+), 15 deletions(-)

diff --git a/src/backend/executor/nodeBitmapHeapscan.c b/src/backend/executor/nodeBitmapHeapscan.c
index 83d6478bc2b..f2bb487bf10 100644
--- a/src/backend/executor/nodeBitmapHeapscan.c
+++ b/src/backend/executor/nodeBitmapHeapscan.c
@@ -79,7 +79,6 @@ typedef enum
 /* ----------------
  *	 ParallelBitmapHeapState information
  *		tbmiterator				iterator for scanning current pages
- *		mutex					mutual exclusion for state
  *		state					current state of the TIDBitmap
  *		cv						conditional wait variable
  * ----------------
@@ -87,8 +86,7 @@ typedef enum
 typedef struct ParallelBitmapHeapState
 {
 	dsa_pointer tbmiterator;
-	slock_t		mutex;
-	SharedBitmapState state;
+	pg_atomic_uint32 state;
 	ConditionVariable cv;
 } ParallelBitmapHeapState;
 
@@ -228,9 +226,7 @@ BitmapHeapNext(BitmapHeapScanState *node)
 static inline void
 BitmapDoneInitializingSharedState(ParallelBitmapHeapState *pstate)
 {
-	SpinLockAcquire(&pstate->mutex);
-	pstate->state = BM_FINISHED;
-	SpinLockRelease(&pstate->mutex);
+	pg_atomic_write_membarrier_u32(&pstate->state, BM_FINISHED);
 	ConditionVariableBroadcast(&pstate->cv);
 }
 
@@ -480,11 +476,8 @@ BitmapShouldInitializeSharedState(ParallelBitmapHeapState *pstate)
 
 	while (1)
 	{
-		SpinLockAcquire(&pstate->mutex);
-		state = pstate->state;
-		if (pstate->state == BM_INITIAL)
-			pstate->state = BM_INPROGRESS;
-		SpinLockRelease(&pstate->mutex);
+		state = BM_INITIAL;
+		pg_atomic_compare_exchange_u32(&pstate->state, &state, BM_INPROGRESS);
 
 		/* Exit if bitmap is done, or if we're the leader. */
 		if (state != BM_INPROGRESS)
@@ -538,9 +531,7 @@ ExecBitmapHeapInitializeDSM(BitmapHeapScanState *node,
 
 	pstate->tbmiterator = 0;
 
-	/* Initialize the mutex */
-	SpinLockInit(&pstate->mutex);
-	pstate->state = BM_INITIAL;
+	pg_atomic_init_u32(&pstate->state, BM_INITIAL);
 
 	ConditionVariableInit(&pstate->cv);
 
@@ -565,7 +556,7 @@ ExecBitmapHeapReInitializeDSM(BitmapHeapScanState *node,
 	if (dsa == NULL)
 		return;
 
-	pstate->state = BM_INITIAL;
+	pg_atomic_write_u32(&pstate->state, BM_INITIAL);
 
 	if (DsaPointerIsValid(pstate->tbmiterator))
 		tbm_free_shared_area(dsa, pstate->tbmiterator);
-- 
2.50.1 (Apple Git-155)


--Ot5x3ffkWEuxilWO
Content-Type: text/plain; charset=us-ascii
Content-Disposition: attachment;
	filename=v1-0003-convert-FixedParallelState-last_xlog_end-to-an-at.patch



^ permalink  raw  reply  [nested|flat] 440+ messages in thread

* [PATCH v1 2/8] convert ParallelBitmapHeapState->state to an atomic
@ 2026-07-09 18:38 Nathan Bossart <nathan@postgresql.org>
  0 siblings, 0 replies; 440+ messages in thread

From: Nathan Bossart @ 2026-07-09 18:38 UTC (permalink / raw)

---
 src/backend/executor/nodeBitmapHeapscan.c | 21 ++++++---------------
 1 file changed, 6 insertions(+), 15 deletions(-)

diff --git a/src/backend/executor/nodeBitmapHeapscan.c b/src/backend/executor/nodeBitmapHeapscan.c
index 83d6478bc2b..f2bb487bf10 100644
--- a/src/backend/executor/nodeBitmapHeapscan.c
+++ b/src/backend/executor/nodeBitmapHeapscan.c
@@ -79,7 +79,6 @@ typedef enum
 /* ----------------
  *	 ParallelBitmapHeapState information
  *		tbmiterator				iterator for scanning current pages
- *		mutex					mutual exclusion for state
  *		state					current state of the TIDBitmap
  *		cv						conditional wait variable
  * ----------------
@@ -87,8 +86,7 @@ typedef enum
 typedef struct ParallelBitmapHeapState
 {
 	dsa_pointer tbmiterator;
-	slock_t		mutex;
-	SharedBitmapState state;
+	pg_atomic_uint32 state;
 	ConditionVariable cv;
 } ParallelBitmapHeapState;
 
@@ -228,9 +226,7 @@ BitmapHeapNext(BitmapHeapScanState *node)
 static inline void
 BitmapDoneInitializingSharedState(ParallelBitmapHeapState *pstate)
 {
-	SpinLockAcquire(&pstate->mutex);
-	pstate->state = BM_FINISHED;
-	SpinLockRelease(&pstate->mutex);
+	pg_atomic_write_membarrier_u32(&pstate->state, BM_FINISHED);
 	ConditionVariableBroadcast(&pstate->cv);
 }
 
@@ -480,11 +476,8 @@ BitmapShouldInitializeSharedState(ParallelBitmapHeapState *pstate)
 
 	while (1)
 	{
-		SpinLockAcquire(&pstate->mutex);
-		state = pstate->state;
-		if (pstate->state == BM_INITIAL)
-			pstate->state = BM_INPROGRESS;
-		SpinLockRelease(&pstate->mutex);
+		state = BM_INITIAL;
+		pg_atomic_compare_exchange_u32(&pstate->state, &state, BM_INPROGRESS);
 
 		/* Exit if bitmap is done, or if we're the leader. */
 		if (state != BM_INPROGRESS)
@@ -538,9 +531,7 @@ ExecBitmapHeapInitializeDSM(BitmapHeapScanState *node,
 
 	pstate->tbmiterator = 0;
 
-	/* Initialize the mutex */
-	SpinLockInit(&pstate->mutex);
-	pstate->state = BM_INITIAL;
+	pg_atomic_init_u32(&pstate->state, BM_INITIAL);
 
 	ConditionVariableInit(&pstate->cv);
 
@@ -565,7 +556,7 @@ ExecBitmapHeapReInitializeDSM(BitmapHeapScanState *node,
 	if (dsa == NULL)
 		return;
 
-	pstate->state = BM_INITIAL;
+	pg_atomic_write_u32(&pstate->state, BM_INITIAL);
 
 	if (DsaPointerIsValid(pstate->tbmiterator))
 		tbm_free_shared_area(dsa, pstate->tbmiterator);
-- 
2.50.1 (Apple Git-155)


--Ot5x3ffkWEuxilWO
Content-Type: text/plain; charset=us-ascii
Content-Disposition: attachment;
	filename=v1-0003-convert-FixedParallelState-last_xlog_end-to-an-at.patch



^ permalink  raw  reply  [nested|flat] 440+ messages in thread

* [PATCH v1 2/8] convert ParallelBitmapHeapState->state to an atomic
@ 2026-07-09 18:38 Nathan Bossart <nathan@postgresql.org>
  0 siblings, 0 replies; 440+ messages in thread

From: Nathan Bossart @ 2026-07-09 18:38 UTC (permalink / raw)

---
 src/backend/executor/nodeBitmapHeapscan.c | 21 ++++++---------------
 1 file changed, 6 insertions(+), 15 deletions(-)

diff --git a/src/backend/executor/nodeBitmapHeapscan.c b/src/backend/executor/nodeBitmapHeapscan.c
index 83d6478bc2b..f2bb487bf10 100644
--- a/src/backend/executor/nodeBitmapHeapscan.c
+++ b/src/backend/executor/nodeBitmapHeapscan.c
@@ -79,7 +79,6 @@ typedef enum
 /* ----------------
  *	 ParallelBitmapHeapState information
  *		tbmiterator				iterator for scanning current pages
- *		mutex					mutual exclusion for state
  *		state					current state of the TIDBitmap
  *		cv						conditional wait variable
  * ----------------
@@ -87,8 +86,7 @@ typedef enum
 typedef struct ParallelBitmapHeapState
 {
 	dsa_pointer tbmiterator;
-	slock_t		mutex;
-	SharedBitmapState state;
+	pg_atomic_uint32 state;
 	ConditionVariable cv;
 } ParallelBitmapHeapState;
 
@@ -228,9 +226,7 @@ BitmapHeapNext(BitmapHeapScanState *node)
 static inline void
 BitmapDoneInitializingSharedState(ParallelBitmapHeapState *pstate)
 {
-	SpinLockAcquire(&pstate->mutex);
-	pstate->state = BM_FINISHED;
-	SpinLockRelease(&pstate->mutex);
+	pg_atomic_write_membarrier_u32(&pstate->state, BM_FINISHED);
 	ConditionVariableBroadcast(&pstate->cv);
 }
 
@@ -480,11 +476,8 @@ BitmapShouldInitializeSharedState(ParallelBitmapHeapState *pstate)
 
 	while (1)
 	{
-		SpinLockAcquire(&pstate->mutex);
-		state = pstate->state;
-		if (pstate->state == BM_INITIAL)
-			pstate->state = BM_INPROGRESS;
-		SpinLockRelease(&pstate->mutex);
+		state = BM_INITIAL;
+		pg_atomic_compare_exchange_u32(&pstate->state, &state, BM_INPROGRESS);
 
 		/* Exit if bitmap is done, or if we're the leader. */
 		if (state != BM_INPROGRESS)
@@ -538,9 +531,7 @@ ExecBitmapHeapInitializeDSM(BitmapHeapScanState *node,
 
 	pstate->tbmiterator = 0;
 
-	/* Initialize the mutex */
-	SpinLockInit(&pstate->mutex);
-	pstate->state = BM_INITIAL;
+	pg_atomic_init_u32(&pstate->state, BM_INITIAL);
 
 	ConditionVariableInit(&pstate->cv);
 
@@ -565,7 +556,7 @@ ExecBitmapHeapReInitializeDSM(BitmapHeapScanState *node,
 	if (dsa == NULL)
 		return;
 
-	pstate->state = BM_INITIAL;
+	pg_atomic_write_u32(&pstate->state, BM_INITIAL);
 
 	if (DsaPointerIsValid(pstate->tbmiterator))
 		tbm_free_shared_area(dsa, pstate->tbmiterator);
-- 
2.50.1 (Apple Git-155)


--Ot5x3ffkWEuxilWO
Content-Type: text/plain; charset=us-ascii
Content-Disposition: attachment;
	filename=v1-0003-convert-FixedParallelState-last_xlog_end-to-an-at.patch



^ permalink  raw  reply  [nested|flat] 440+ messages in thread

* [PATCH v1 2/8] convert ParallelBitmapHeapState->state to an atomic
@ 2026-07-09 18:38 Nathan Bossart <nathan@postgresql.org>
  0 siblings, 0 replies; 440+ messages in thread

From: Nathan Bossart @ 2026-07-09 18:38 UTC (permalink / raw)

---
 src/backend/executor/nodeBitmapHeapscan.c | 21 ++++++---------------
 1 file changed, 6 insertions(+), 15 deletions(-)

diff --git a/src/backend/executor/nodeBitmapHeapscan.c b/src/backend/executor/nodeBitmapHeapscan.c
index 83d6478bc2b..f2bb487bf10 100644
--- a/src/backend/executor/nodeBitmapHeapscan.c
+++ b/src/backend/executor/nodeBitmapHeapscan.c
@@ -79,7 +79,6 @@ typedef enum
 /* ----------------
  *	 ParallelBitmapHeapState information
  *		tbmiterator				iterator for scanning current pages
- *		mutex					mutual exclusion for state
  *		state					current state of the TIDBitmap
  *		cv						conditional wait variable
  * ----------------
@@ -87,8 +86,7 @@ typedef enum
 typedef struct ParallelBitmapHeapState
 {
 	dsa_pointer tbmiterator;
-	slock_t		mutex;
-	SharedBitmapState state;
+	pg_atomic_uint32 state;
 	ConditionVariable cv;
 } ParallelBitmapHeapState;
 
@@ -228,9 +226,7 @@ BitmapHeapNext(BitmapHeapScanState *node)
 static inline void
 BitmapDoneInitializingSharedState(ParallelBitmapHeapState *pstate)
 {
-	SpinLockAcquire(&pstate->mutex);
-	pstate->state = BM_FINISHED;
-	SpinLockRelease(&pstate->mutex);
+	pg_atomic_write_membarrier_u32(&pstate->state, BM_FINISHED);
 	ConditionVariableBroadcast(&pstate->cv);
 }
 
@@ -480,11 +476,8 @@ BitmapShouldInitializeSharedState(ParallelBitmapHeapState *pstate)
 
 	while (1)
 	{
-		SpinLockAcquire(&pstate->mutex);
-		state = pstate->state;
-		if (pstate->state == BM_INITIAL)
-			pstate->state = BM_INPROGRESS;
-		SpinLockRelease(&pstate->mutex);
+		state = BM_INITIAL;
+		pg_atomic_compare_exchange_u32(&pstate->state, &state, BM_INPROGRESS);
 
 		/* Exit if bitmap is done, or if we're the leader. */
 		if (state != BM_INPROGRESS)
@@ -538,9 +531,7 @@ ExecBitmapHeapInitializeDSM(BitmapHeapScanState *node,
 
 	pstate->tbmiterator = 0;
 
-	/* Initialize the mutex */
-	SpinLockInit(&pstate->mutex);
-	pstate->state = BM_INITIAL;
+	pg_atomic_init_u32(&pstate->state, BM_INITIAL);
 
 	ConditionVariableInit(&pstate->cv);
 
@@ -565,7 +556,7 @@ ExecBitmapHeapReInitializeDSM(BitmapHeapScanState *node,
 	if (dsa == NULL)
 		return;
 
-	pstate->state = BM_INITIAL;
+	pg_atomic_write_u32(&pstate->state, BM_INITIAL);
 
 	if (DsaPointerIsValid(pstate->tbmiterator))
 		tbm_free_shared_area(dsa, pstate->tbmiterator);
-- 
2.50.1 (Apple Git-155)


--Ot5x3ffkWEuxilWO
Content-Type: text/plain; charset=us-ascii
Content-Disposition: attachment;
	filename=v1-0003-convert-FixedParallelState-last_xlog_end-to-an-at.patch



^ permalink  raw  reply  [nested|flat] 440+ messages in thread

* [PATCH v1 2/8] convert ParallelBitmapHeapState->state to an atomic
@ 2026-07-09 18:38 Nathan Bossart <nathan@postgresql.org>
  0 siblings, 0 replies; 440+ messages in thread

From: Nathan Bossart @ 2026-07-09 18:38 UTC (permalink / raw)

---
 src/backend/executor/nodeBitmapHeapscan.c | 21 ++++++---------------
 1 file changed, 6 insertions(+), 15 deletions(-)

diff --git a/src/backend/executor/nodeBitmapHeapscan.c b/src/backend/executor/nodeBitmapHeapscan.c
index 83d6478bc2b..f2bb487bf10 100644
--- a/src/backend/executor/nodeBitmapHeapscan.c
+++ b/src/backend/executor/nodeBitmapHeapscan.c
@@ -79,7 +79,6 @@ typedef enum
 /* ----------------
  *	 ParallelBitmapHeapState information
  *		tbmiterator				iterator for scanning current pages
- *		mutex					mutual exclusion for state
  *		state					current state of the TIDBitmap
  *		cv						conditional wait variable
  * ----------------
@@ -87,8 +86,7 @@ typedef enum
 typedef struct ParallelBitmapHeapState
 {
 	dsa_pointer tbmiterator;
-	slock_t		mutex;
-	SharedBitmapState state;
+	pg_atomic_uint32 state;
 	ConditionVariable cv;
 } ParallelBitmapHeapState;
 
@@ -228,9 +226,7 @@ BitmapHeapNext(BitmapHeapScanState *node)
 static inline void
 BitmapDoneInitializingSharedState(ParallelBitmapHeapState *pstate)
 {
-	SpinLockAcquire(&pstate->mutex);
-	pstate->state = BM_FINISHED;
-	SpinLockRelease(&pstate->mutex);
+	pg_atomic_write_membarrier_u32(&pstate->state, BM_FINISHED);
 	ConditionVariableBroadcast(&pstate->cv);
 }
 
@@ -480,11 +476,8 @@ BitmapShouldInitializeSharedState(ParallelBitmapHeapState *pstate)
 
 	while (1)
 	{
-		SpinLockAcquire(&pstate->mutex);
-		state = pstate->state;
-		if (pstate->state == BM_INITIAL)
-			pstate->state = BM_INPROGRESS;
-		SpinLockRelease(&pstate->mutex);
+		state = BM_INITIAL;
+		pg_atomic_compare_exchange_u32(&pstate->state, &state, BM_INPROGRESS);
 
 		/* Exit if bitmap is done, or if we're the leader. */
 		if (state != BM_INPROGRESS)
@@ -538,9 +531,7 @@ ExecBitmapHeapInitializeDSM(BitmapHeapScanState *node,
 
 	pstate->tbmiterator = 0;
 
-	/* Initialize the mutex */
-	SpinLockInit(&pstate->mutex);
-	pstate->state = BM_INITIAL;
+	pg_atomic_init_u32(&pstate->state, BM_INITIAL);
 
 	ConditionVariableInit(&pstate->cv);
 
@@ -565,7 +556,7 @@ ExecBitmapHeapReInitializeDSM(BitmapHeapScanState *node,
 	if (dsa == NULL)
 		return;
 
-	pstate->state = BM_INITIAL;
+	pg_atomic_write_u32(&pstate->state, BM_INITIAL);
 
 	if (DsaPointerIsValid(pstate->tbmiterator))
 		tbm_free_shared_area(dsa, pstate->tbmiterator);
-- 
2.50.1 (Apple Git-155)


--Ot5x3ffkWEuxilWO
Content-Type: text/plain; charset=us-ascii
Content-Disposition: attachment;
	filename=v1-0003-convert-FixedParallelState-last_xlog_end-to-an-at.patch



^ permalink  raw  reply  [nested|flat] 440+ messages in thread

* [PATCH v1 2/8] convert ParallelBitmapHeapState->state to an atomic
@ 2026-07-09 18:38 Nathan Bossart <nathan@postgresql.org>
  0 siblings, 0 replies; 440+ messages in thread

From: Nathan Bossart @ 2026-07-09 18:38 UTC (permalink / raw)

---
 src/backend/executor/nodeBitmapHeapscan.c | 21 ++++++---------------
 1 file changed, 6 insertions(+), 15 deletions(-)

diff --git a/src/backend/executor/nodeBitmapHeapscan.c b/src/backend/executor/nodeBitmapHeapscan.c
index 83d6478bc2b..f2bb487bf10 100644
--- a/src/backend/executor/nodeBitmapHeapscan.c
+++ b/src/backend/executor/nodeBitmapHeapscan.c
@@ -79,7 +79,6 @@ typedef enum
 /* ----------------
  *	 ParallelBitmapHeapState information
  *		tbmiterator				iterator for scanning current pages
- *		mutex					mutual exclusion for state
  *		state					current state of the TIDBitmap
  *		cv						conditional wait variable
  * ----------------
@@ -87,8 +86,7 @@ typedef enum
 typedef struct ParallelBitmapHeapState
 {
 	dsa_pointer tbmiterator;
-	slock_t		mutex;
-	SharedBitmapState state;
+	pg_atomic_uint32 state;
 	ConditionVariable cv;
 } ParallelBitmapHeapState;
 
@@ -228,9 +226,7 @@ BitmapHeapNext(BitmapHeapScanState *node)
 static inline void
 BitmapDoneInitializingSharedState(ParallelBitmapHeapState *pstate)
 {
-	SpinLockAcquire(&pstate->mutex);
-	pstate->state = BM_FINISHED;
-	SpinLockRelease(&pstate->mutex);
+	pg_atomic_write_membarrier_u32(&pstate->state, BM_FINISHED);
 	ConditionVariableBroadcast(&pstate->cv);
 }
 
@@ -480,11 +476,8 @@ BitmapShouldInitializeSharedState(ParallelBitmapHeapState *pstate)
 
 	while (1)
 	{
-		SpinLockAcquire(&pstate->mutex);
-		state = pstate->state;
-		if (pstate->state == BM_INITIAL)
-			pstate->state = BM_INPROGRESS;
-		SpinLockRelease(&pstate->mutex);
+		state = BM_INITIAL;
+		pg_atomic_compare_exchange_u32(&pstate->state, &state, BM_INPROGRESS);
 
 		/* Exit if bitmap is done, or if we're the leader. */
 		if (state != BM_INPROGRESS)
@@ -538,9 +531,7 @@ ExecBitmapHeapInitializeDSM(BitmapHeapScanState *node,
 
 	pstate->tbmiterator = 0;
 
-	/* Initialize the mutex */
-	SpinLockInit(&pstate->mutex);
-	pstate->state = BM_INITIAL;
+	pg_atomic_init_u32(&pstate->state, BM_INITIAL);
 
 	ConditionVariableInit(&pstate->cv);
 
@@ -565,7 +556,7 @@ ExecBitmapHeapReInitializeDSM(BitmapHeapScanState *node,
 	if (dsa == NULL)
 		return;
 
-	pstate->state = BM_INITIAL;
+	pg_atomic_write_u32(&pstate->state, BM_INITIAL);
 
 	if (DsaPointerIsValid(pstate->tbmiterator))
 		tbm_free_shared_area(dsa, pstate->tbmiterator);
-- 
2.50.1 (Apple Git-155)


--Ot5x3ffkWEuxilWO
Content-Type: text/plain; charset=us-ascii
Content-Disposition: attachment;
	filename=v1-0003-convert-FixedParallelState-last_xlog_end-to-an-at.patch



^ permalink  raw  reply  [nested|flat] 440+ messages in thread

* [PATCH v1 2/8] convert ParallelBitmapHeapState->state to an atomic
@ 2026-07-09 18:38 Nathan Bossart <nathan@postgresql.org>
  0 siblings, 0 replies; 440+ messages in thread

From: Nathan Bossart @ 2026-07-09 18:38 UTC (permalink / raw)

---
 src/backend/executor/nodeBitmapHeapscan.c | 21 ++++++---------------
 1 file changed, 6 insertions(+), 15 deletions(-)

diff --git a/src/backend/executor/nodeBitmapHeapscan.c b/src/backend/executor/nodeBitmapHeapscan.c
index 83d6478bc2b..f2bb487bf10 100644
--- a/src/backend/executor/nodeBitmapHeapscan.c
+++ b/src/backend/executor/nodeBitmapHeapscan.c
@@ -79,7 +79,6 @@ typedef enum
 /* ----------------
  *	 ParallelBitmapHeapState information
  *		tbmiterator				iterator for scanning current pages
- *		mutex					mutual exclusion for state
  *		state					current state of the TIDBitmap
  *		cv						conditional wait variable
  * ----------------
@@ -87,8 +86,7 @@ typedef enum
 typedef struct ParallelBitmapHeapState
 {
 	dsa_pointer tbmiterator;
-	slock_t		mutex;
-	SharedBitmapState state;
+	pg_atomic_uint32 state;
 	ConditionVariable cv;
 } ParallelBitmapHeapState;
 
@@ -228,9 +226,7 @@ BitmapHeapNext(BitmapHeapScanState *node)
 static inline void
 BitmapDoneInitializingSharedState(ParallelBitmapHeapState *pstate)
 {
-	SpinLockAcquire(&pstate->mutex);
-	pstate->state = BM_FINISHED;
-	SpinLockRelease(&pstate->mutex);
+	pg_atomic_write_membarrier_u32(&pstate->state, BM_FINISHED);
 	ConditionVariableBroadcast(&pstate->cv);
 }
 
@@ -480,11 +476,8 @@ BitmapShouldInitializeSharedState(ParallelBitmapHeapState *pstate)
 
 	while (1)
 	{
-		SpinLockAcquire(&pstate->mutex);
-		state = pstate->state;
-		if (pstate->state == BM_INITIAL)
-			pstate->state = BM_INPROGRESS;
-		SpinLockRelease(&pstate->mutex);
+		state = BM_INITIAL;
+		pg_atomic_compare_exchange_u32(&pstate->state, &state, BM_INPROGRESS);
 
 		/* Exit if bitmap is done, or if we're the leader. */
 		if (state != BM_INPROGRESS)
@@ -538,9 +531,7 @@ ExecBitmapHeapInitializeDSM(BitmapHeapScanState *node,
 
 	pstate->tbmiterator = 0;
 
-	/* Initialize the mutex */
-	SpinLockInit(&pstate->mutex);
-	pstate->state = BM_INITIAL;
+	pg_atomic_init_u32(&pstate->state, BM_INITIAL);
 
 	ConditionVariableInit(&pstate->cv);
 
@@ -565,7 +556,7 @@ ExecBitmapHeapReInitializeDSM(BitmapHeapScanState *node,
 	if (dsa == NULL)
 		return;
 
-	pstate->state = BM_INITIAL;
+	pg_atomic_write_u32(&pstate->state, BM_INITIAL);
 
 	if (DsaPointerIsValid(pstate->tbmiterator))
 		tbm_free_shared_area(dsa, pstate->tbmiterator);
-- 
2.50.1 (Apple Git-155)


--Ot5x3ffkWEuxilWO
Content-Type: text/plain; charset=us-ascii
Content-Disposition: attachment;
	filename=v1-0003-convert-FixedParallelState-last_xlog_end-to-an-at.patch



^ permalink  raw  reply  [nested|flat] 440+ messages in thread

* [PATCH v1 2/8] convert ParallelBitmapHeapState->state to an atomic
@ 2026-07-09 18:38 Nathan Bossart <nathan@postgresql.org>
  0 siblings, 0 replies; 440+ messages in thread

From: Nathan Bossart @ 2026-07-09 18:38 UTC (permalink / raw)

---
 src/backend/executor/nodeBitmapHeapscan.c | 21 ++++++---------------
 1 file changed, 6 insertions(+), 15 deletions(-)

diff --git a/src/backend/executor/nodeBitmapHeapscan.c b/src/backend/executor/nodeBitmapHeapscan.c
index 83d6478bc2b..f2bb487bf10 100644
--- a/src/backend/executor/nodeBitmapHeapscan.c
+++ b/src/backend/executor/nodeBitmapHeapscan.c
@@ -79,7 +79,6 @@ typedef enum
 /* ----------------
  *	 ParallelBitmapHeapState information
  *		tbmiterator				iterator for scanning current pages
- *		mutex					mutual exclusion for state
  *		state					current state of the TIDBitmap
  *		cv						conditional wait variable
  * ----------------
@@ -87,8 +86,7 @@ typedef enum
 typedef struct ParallelBitmapHeapState
 {
 	dsa_pointer tbmiterator;
-	slock_t		mutex;
-	SharedBitmapState state;
+	pg_atomic_uint32 state;
 	ConditionVariable cv;
 } ParallelBitmapHeapState;
 
@@ -228,9 +226,7 @@ BitmapHeapNext(BitmapHeapScanState *node)
 static inline void
 BitmapDoneInitializingSharedState(ParallelBitmapHeapState *pstate)
 {
-	SpinLockAcquire(&pstate->mutex);
-	pstate->state = BM_FINISHED;
-	SpinLockRelease(&pstate->mutex);
+	pg_atomic_write_membarrier_u32(&pstate->state, BM_FINISHED);
 	ConditionVariableBroadcast(&pstate->cv);
 }
 
@@ -480,11 +476,8 @@ BitmapShouldInitializeSharedState(ParallelBitmapHeapState *pstate)
 
 	while (1)
 	{
-		SpinLockAcquire(&pstate->mutex);
-		state = pstate->state;
-		if (pstate->state == BM_INITIAL)
-			pstate->state = BM_INPROGRESS;
-		SpinLockRelease(&pstate->mutex);
+		state = BM_INITIAL;
+		pg_atomic_compare_exchange_u32(&pstate->state, &state, BM_INPROGRESS);
 
 		/* Exit if bitmap is done, or if we're the leader. */
 		if (state != BM_INPROGRESS)
@@ -538,9 +531,7 @@ ExecBitmapHeapInitializeDSM(BitmapHeapScanState *node,
 
 	pstate->tbmiterator = 0;
 
-	/* Initialize the mutex */
-	SpinLockInit(&pstate->mutex);
-	pstate->state = BM_INITIAL;
+	pg_atomic_init_u32(&pstate->state, BM_INITIAL);
 
 	ConditionVariableInit(&pstate->cv);
 
@@ -565,7 +556,7 @@ ExecBitmapHeapReInitializeDSM(BitmapHeapScanState *node,
 	if (dsa == NULL)
 		return;
 
-	pstate->state = BM_INITIAL;
+	pg_atomic_write_u32(&pstate->state, BM_INITIAL);
 
 	if (DsaPointerIsValid(pstate->tbmiterator))
 		tbm_free_shared_area(dsa, pstate->tbmiterator);
-- 
2.50.1 (Apple Git-155)


--Ot5x3ffkWEuxilWO
Content-Type: text/plain; charset=us-ascii
Content-Disposition: attachment;
	filename=v1-0003-convert-FixedParallelState-last_xlog_end-to-an-at.patch



^ permalink  raw  reply  [nested|flat] 440+ messages in thread

* [PATCH v2 2/9] convert ParallelBitmapHeapState->state to an atomic
@ 2026-07-09 18:38 Nathan Bossart <nathan@postgresql.org>
  0 siblings, 0 replies; 440+ messages in thread

From: Nathan Bossart @ 2026-07-09 18:38 UTC (permalink / raw)

---
 src/backend/executor/nodeBitmapHeapscan.c | 23 +++++++----------------
 1 file changed, 7 insertions(+), 16 deletions(-)

diff --git a/src/backend/executor/nodeBitmapHeapscan.c b/src/backend/executor/nodeBitmapHeapscan.c
index 83d6478bc2b..a9e83f30687 100644
--- a/src/backend/executor/nodeBitmapHeapscan.c
+++ b/src/backend/executor/nodeBitmapHeapscan.c
@@ -79,7 +79,6 @@ typedef enum
 /* ----------------
  *	 ParallelBitmapHeapState information
  *		tbmiterator				iterator for scanning current pages
- *		mutex					mutual exclusion for state
  *		state					current state of the TIDBitmap
  *		cv						conditional wait variable
  * ----------------
@@ -87,8 +86,7 @@ typedef enum
 typedef struct ParallelBitmapHeapState
 {
 	dsa_pointer tbmiterator;
-	slock_t		mutex;
-	SharedBitmapState state;
+	pg_atomic_uint32 state;
 	ConditionVariable cv;
 } ParallelBitmapHeapState;
 
@@ -228,9 +226,7 @@ BitmapHeapNext(BitmapHeapScanState *node)
 static inline void
 BitmapDoneInitializingSharedState(ParallelBitmapHeapState *pstate)
 {
-	SpinLockAcquire(&pstate->mutex);
-	pstate->state = BM_FINISHED;
-	SpinLockRelease(&pstate->mutex);
+	pg_atomic_write_membarrier_u32(&pstate->state, BM_FINISHED);
 	ConditionVariableBroadcast(&pstate->cv);
 }
 
@@ -476,15 +472,12 @@ ExecInitBitmapHeapScan(BitmapHeapScan *node, EState *estate, int eflags)
 static bool
 BitmapShouldInitializeSharedState(ParallelBitmapHeapState *pstate)
 {
-	SharedBitmapState state;
+	uint32		state;
 
 	while (1)
 	{
-		SpinLockAcquire(&pstate->mutex);
-		state = pstate->state;
-		if (pstate->state == BM_INITIAL)
-			pstate->state = BM_INPROGRESS;
-		SpinLockRelease(&pstate->mutex);
+		state = BM_INITIAL;
+		pg_atomic_compare_exchange_u32(&pstate->state, &state, BM_INPROGRESS);
 
 		/* Exit if bitmap is done, or if we're the leader. */
 		if (state != BM_INPROGRESS)
@@ -538,9 +531,7 @@ ExecBitmapHeapInitializeDSM(BitmapHeapScanState *node,
 
 	pstate->tbmiterator = 0;
 
-	/* Initialize the mutex */
-	SpinLockInit(&pstate->mutex);
-	pstate->state = BM_INITIAL;
+	pg_atomic_init_u32(&pstate->state, BM_INITIAL);
 
 	ConditionVariableInit(&pstate->cv);
 
@@ -565,7 +556,7 @@ ExecBitmapHeapReInitializeDSM(BitmapHeapScanState *node,
 	if (dsa == NULL)
 		return;
 
-	pstate->state = BM_INITIAL;
+	pg_atomic_write_u32(&pstate->state, BM_INITIAL);
 
 	if (DsaPointerIsValid(pstate->tbmiterator))
 		tbm_free_shared_area(dsa, pstate->tbmiterator);
-- 
2.50.1 (Apple Git-155)


--Xf36GNcW+0xZNily
Content-Type: text/plain; charset=us-ascii
Content-Disposition: attachment;
	filename=v2-0003-convert-FixedParallelState-last_xlog_end-to-an-at.patch



^ permalink  raw  reply  [nested|flat] 440+ messages in thread

* [PATCH v2 2/9] convert ParallelBitmapHeapState->state to an atomic
@ 2026-07-09 18:38 Nathan Bossart <nathan@postgresql.org>
  0 siblings, 0 replies; 440+ messages in thread

From: Nathan Bossart @ 2026-07-09 18:38 UTC (permalink / raw)

---
 src/backend/executor/nodeBitmapHeapscan.c | 23 +++++++----------------
 1 file changed, 7 insertions(+), 16 deletions(-)

diff --git a/src/backend/executor/nodeBitmapHeapscan.c b/src/backend/executor/nodeBitmapHeapscan.c
index 83d6478bc2b..a9e83f30687 100644
--- a/src/backend/executor/nodeBitmapHeapscan.c
+++ b/src/backend/executor/nodeBitmapHeapscan.c
@@ -79,7 +79,6 @@ typedef enum
 /* ----------------
  *	 ParallelBitmapHeapState information
  *		tbmiterator				iterator for scanning current pages
- *		mutex					mutual exclusion for state
  *		state					current state of the TIDBitmap
  *		cv						conditional wait variable
  * ----------------
@@ -87,8 +86,7 @@ typedef enum
 typedef struct ParallelBitmapHeapState
 {
 	dsa_pointer tbmiterator;
-	slock_t		mutex;
-	SharedBitmapState state;
+	pg_atomic_uint32 state;
 	ConditionVariable cv;
 } ParallelBitmapHeapState;
 
@@ -228,9 +226,7 @@ BitmapHeapNext(BitmapHeapScanState *node)
 static inline void
 BitmapDoneInitializingSharedState(ParallelBitmapHeapState *pstate)
 {
-	SpinLockAcquire(&pstate->mutex);
-	pstate->state = BM_FINISHED;
-	SpinLockRelease(&pstate->mutex);
+	pg_atomic_write_membarrier_u32(&pstate->state, BM_FINISHED);
 	ConditionVariableBroadcast(&pstate->cv);
 }
 
@@ -476,15 +472,12 @@ ExecInitBitmapHeapScan(BitmapHeapScan *node, EState *estate, int eflags)
 static bool
 BitmapShouldInitializeSharedState(ParallelBitmapHeapState *pstate)
 {
-	SharedBitmapState state;
+	uint32		state;
 
 	while (1)
 	{
-		SpinLockAcquire(&pstate->mutex);
-		state = pstate->state;
-		if (pstate->state == BM_INITIAL)
-			pstate->state = BM_INPROGRESS;
-		SpinLockRelease(&pstate->mutex);
+		state = BM_INITIAL;
+		pg_atomic_compare_exchange_u32(&pstate->state, &state, BM_INPROGRESS);
 
 		/* Exit if bitmap is done, or if we're the leader. */
 		if (state != BM_INPROGRESS)
@@ -538,9 +531,7 @@ ExecBitmapHeapInitializeDSM(BitmapHeapScanState *node,
 
 	pstate->tbmiterator = 0;
 
-	/* Initialize the mutex */
-	SpinLockInit(&pstate->mutex);
-	pstate->state = BM_INITIAL;
+	pg_atomic_init_u32(&pstate->state, BM_INITIAL);
 
 	ConditionVariableInit(&pstate->cv);
 
@@ -565,7 +556,7 @@ ExecBitmapHeapReInitializeDSM(BitmapHeapScanState *node,
 	if (dsa == NULL)
 		return;
 
-	pstate->state = BM_INITIAL;
+	pg_atomic_write_u32(&pstate->state, BM_INITIAL);
 
 	if (DsaPointerIsValid(pstate->tbmiterator))
 		tbm_free_shared_area(dsa, pstate->tbmiterator);
-- 
2.50.1 (Apple Git-155)


--Xf36GNcW+0xZNily
Content-Type: text/plain; charset=us-ascii
Content-Disposition: attachment;
	filename=v2-0003-convert-FixedParallelState-last_xlog_end-to-an-at.patch



^ permalink  raw  reply  [nested|flat] 440+ messages in thread

* [PATCH v1 2/8] convert ParallelBitmapHeapState->state to an atomic
@ 2026-07-09 18:38 Nathan Bossart <nathan@postgresql.org>
  0 siblings, 0 replies; 440+ messages in thread

From: Nathan Bossart @ 2026-07-09 18:38 UTC (permalink / raw)

---
 src/backend/executor/nodeBitmapHeapscan.c | 21 ++++++---------------
 1 file changed, 6 insertions(+), 15 deletions(-)

diff --git a/src/backend/executor/nodeBitmapHeapscan.c b/src/backend/executor/nodeBitmapHeapscan.c
index 83d6478bc2b..f2bb487bf10 100644
--- a/src/backend/executor/nodeBitmapHeapscan.c
+++ b/src/backend/executor/nodeBitmapHeapscan.c
@@ -79,7 +79,6 @@ typedef enum
 /* ----------------
  *	 ParallelBitmapHeapState information
  *		tbmiterator				iterator for scanning current pages
- *		mutex					mutual exclusion for state
  *		state					current state of the TIDBitmap
  *		cv						conditional wait variable
  * ----------------
@@ -87,8 +86,7 @@ typedef enum
 typedef struct ParallelBitmapHeapState
 {
 	dsa_pointer tbmiterator;
-	slock_t		mutex;
-	SharedBitmapState state;
+	pg_atomic_uint32 state;
 	ConditionVariable cv;
 } ParallelBitmapHeapState;
 
@@ -228,9 +226,7 @@ BitmapHeapNext(BitmapHeapScanState *node)
 static inline void
 BitmapDoneInitializingSharedState(ParallelBitmapHeapState *pstate)
 {
-	SpinLockAcquire(&pstate->mutex);
-	pstate->state = BM_FINISHED;
-	SpinLockRelease(&pstate->mutex);
+	pg_atomic_write_membarrier_u32(&pstate->state, BM_FINISHED);
 	ConditionVariableBroadcast(&pstate->cv);
 }
 
@@ -480,11 +476,8 @@ BitmapShouldInitializeSharedState(ParallelBitmapHeapState *pstate)
 
 	while (1)
 	{
-		SpinLockAcquire(&pstate->mutex);
-		state = pstate->state;
-		if (pstate->state == BM_INITIAL)
-			pstate->state = BM_INPROGRESS;
-		SpinLockRelease(&pstate->mutex);
+		state = BM_INITIAL;
+		pg_atomic_compare_exchange_u32(&pstate->state, &state, BM_INPROGRESS);
 
 		/* Exit if bitmap is done, or if we're the leader. */
 		if (state != BM_INPROGRESS)
@@ -538,9 +531,7 @@ ExecBitmapHeapInitializeDSM(BitmapHeapScanState *node,
 
 	pstate->tbmiterator = 0;
 
-	/* Initialize the mutex */
-	SpinLockInit(&pstate->mutex);
-	pstate->state = BM_INITIAL;
+	pg_atomic_init_u32(&pstate->state, BM_INITIAL);
 
 	ConditionVariableInit(&pstate->cv);
 
@@ -565,7 +556,7 @@ ExecBitmapHeapReInitializeDSM(BitmapHeapScanState *node,
 	if (dsa == NULL)
 		return;
 
-	pstate->state = BM_INITIAL;
+	pg_atomic_write_u32(&pstate->state, BM_INITIAL);
 
 	if (DsaPointerIsValid(pstate->tbmiterator))
 		tbm_free_shared_area(dsa, pstate->tbmiterator);
-- 
2.50.1 (Apple Git-155)


--Ot5x3ffkWEuxilWO
Content-Type: text/plain; charset=us-ascii
Content-Disposition: attachment;
	filename=v1-0003-convert-FixedParallelState-last_xlog_end-to-an-at.patch



^ permalink  raw  reply  [nested|flat] 440+ messages in thread

* [PATCH v1 2/8] convert ParallelBitmapHeapState->state to an atomic
@ 2026-07-09 18:38 Nathan Bossart <nathan@postgresql.org>
  0 siblings, 0 replies; 440+ messages in thread

From: Nathan Bossart @ 2026-07-09 18:38 UTC (permalink / raw)

---
 src/backend/executor/nodeBitmapHeapscan.c | 21 ++++++---------------
 1 file changed, 6 insertions(+), 15 deletions(-)

diff --git a/src/backend/executor/nodeBitmapHeapscan.c b/src/backend/executor/nodeBitmapHeapscan.c
index 83d6478bc2b..f2bb487bf10 100644
--- a/src/backend/executor/nodeBitmapHeapscan.c
+++ b/src/backend/executor/nodeBitmapHeapscan.c
@@ -79,7 +79,6 @@ typedef enum
 /* ----------------
  *	 ParallelBitmapHeapState information
  *		tbmiterator				iterator for scanning current pages
- *		mutex					mutual exclusion for state
  *		state					current state of the TIDBitmap
  *		cv						conditional wait variable
  * ----------------
@@ -87,8 +86,7 @@ typedef enum
 typedef struct ParallelBitmapHeapState
 {
 	dsa_pointer tbmiterator;
-	slock_t		mutex;
-	SharedBitmapState state;
+	pg_atomic_uint32 state;
 	ConditionVariable cv;
 } ParallelBitmapHeapState;
 
@@ -228,9 +226,7 @@ BitmapHeapNext(BitmapHeapScanState *node)
 static inline void
 BitmapDoneInitializingSharedState(ParallelBitmapHeapState *pstate)
 {
-	SpinLockAcquire(&pstate->mutex);
-	pstate->state = BM_FINISHED;
-	SpinLockRelease(&pstate->mutex);
+	pg_atomic_write_membarrier_u32(&pstate->state, BM_FINISHED);
 	ConditionVariableBroadcast(&pstate->cv);
 }
 
@@ -480,11 +476,8 @@ BitmapShouldInitializeSharedState(ParallelBitmapHeapState *pstate)
 
 	while (1)
 	{
-		SpinLockAcquire(&pstate->mutex);
-		state = pstate->state;
-		if (pstate->state == BM_INITIAL)
-			pstate->state = BM_INPROGRESS;
-		SpinLockRelease(&pstate->mutex);
+		state = BM_INITIAL;
+		pg_atomic_compare_exchange_u32(&pstate->state, &state, BM_INPROGRESS);
 
 		/* Exit if bitmap is done, or if we're the leader. */
 		if (state != BM_INPROGRESS)
@@ -538,9 +531,7 @@ ExecBitmapHeapInitializeDSM(BitmapHeapScanState *node,
 
 	pstate->tbmiterator = 0;
 
-	/* Initialize the mutex */
-	SpinLockInit(&pstate->mutex);
-	pstate->state = BM_INITIAL;
+	pg_atomic_init_u32(&pstate->state, BM_INITIAL);
 
 	ConditionVariableInit(&pstate->cv);
 
@@ -565,7 +556,7 @@ ExecBitmapHeapReInitializeDSM(BitmapHeapScanState *node,
 	if (dsa == NULL)
 		return;
 
-	pstate->state = BM_INITIAL;
+	pg_atomic_write_u32(&pstate->state, BM_INITIAL);
 
 	if (DsaPointerIsValid(pstate->tbmiterator))
 		tbm_free_shared_area(dsa, pstate->tbmiterator);
-- 
2.50.1 (Apple Git-155)


--Ot5x3ffkWEuxilWO
Content-Type: text/plain; charset=us-ascii
Content-Disposition: attachment;
	filename=v1-0003-convert-FixedParallelState-last_xlog_end-to-an-at.patch



^ permalink  raw  reply  [nested|flat] 440+ messages in thread

* [PATCH v1 2/8] convert ParallelBitmapHeapState->state to an atomic
@ 2026-07-09 18:38 Nathan Bossart <nathan@postgresql.org>
  0 siblings, 0 replies; 440+ messages in thread

From: Nathan Bossart @ 2026-07-09 18:38 UTC (permalink / raw)

---
 src/backend/executor/nodeBitmapHeapscan.c | 21 ++++++---------------
 1 file changed, 6 insertions(+), 15 deletions(-)

diff --git a/src/backend/executor/nodeBitmapHeapscan.c b/src/backend/executor/nodeBitmapHeapscan.c
index 83d6478bc2b..f2bb487bf10 100644
--- a/src/backend/executor/nodeBitmapHeapscan.c
+++ b/src/backend/executor/nodeBitmapHeapscan.c
@@ -79,7 +79,6 @@ typedef enum
 /* ----------------
  *	 ParallelBitmapHeapState information
  *		tbmiterator				iterator for scanning current pages
- *		mutex					mutual exclusion for state
  *		state					current state of the TIDBitmap
  *		cv						conditional wait variable
  * ----------------
@@ -87,8 +86,7 @@ typedef enum
 typedef struct ParallelBitmapHeapState
 {
 	dsa_pointer tbmiterator;
-	slock_t		mutex;
-	SharedBitmapState state;
+	pg_atomic_uint32 state;
 	ConditionVariable cv;
 } ParallelBitmapHeapState;
 
@@ -228,9 +226,7 @@ BitmapHeapNext(BitmapHeapScanState *node)
 static inline void
 BitmapDoneInitializingSharedState(ParallelBitmapHeapState *pstate)
 {
-	SpinLockAcquire(&pstate->mutex);
-	pstate->state = BM_FINISHED;
-	SpinLockRelease(&pstate->mutex);
+	pg_atomic_write_membarrier_u32(&pstate->state, BM_FINISHED);
 	ConditionVariableBroadcast(&pstate->cv);
 }
 
@@ -480,11 +476,8 @@ BitmapShouldInitializeSharedState(ParallelBitmapHeapState *pstate)
 
 	while (1)
 	{
-		SpinLockAcquire(&pstate->mutex);
-		state = pstate->state;
-		if (pstate->state == BM_INITIAL)
-			pstate->state = BM_INPROGRESS;
-		SpinLockRelease(&pstate->mutex);
+		state = BM_INITIAL;
+		pg_atomic_compare_exchange_u32(&pstate->state, &state, BM_INPROGRESS);
 
 		/* Exit if bitmap is done, or if we're the leader. */
 		if (state != BM_INPROGRESS)
@@ -538,9 +531,7 @@ ExecBitmapHeapInitializeDSM(BitmapHeapScanState *node,
 
 	pstate->tbmiterator = 0;
 
-	/* Initialize the mutex */
-	SpinLockInit(&pstate->mutex);
-	pstate->state = BM_INITIAL;
+	pg_atomic_init_u32(&pstate->state, BM_INITIAL);
 
 	ConditionVariableInit(&pstate->cv);
 
@@ -565,7 +556,7 @@ ExecBitmapHeapReInitializeDSM(BitmapHeapScanState *node,
 	if (dsa == NULL)
 		return;
 
-	pstate->state = BM_INITIAL;
+	pg_atomic_write_u32(&pstate->state, BM_INITIAL);
 
 	if (DsaPointerIsValid(pstate->tbmiterator))
 		tbm_free_shared_area(dsa, pstate->tbmiterator);
-- 
2.50.1 (Apple Git-155)


--Ot5x3ffkWEuxilWO
Content-Type: text/plain; charset=us-ascii
Content-Disposition: attachment;
	filename=v1-0003-convert-FixedParallelState-last_xlog_end-to-an-at.patch



^ permalink  raw  reply  [nested|flat] 440+ messages in thread

* [PATCH v1 2/8] convert ParallelBitmapHeapState->state to an atomic
@ 2026-07-09 18:38 Nathan Bossart <nathan@postgresql.org>
  0 siblings, 0 replies; 440+ messages in thread

From: Nathan Bossart @ 2026-07-09 18:38 UTC (permalink / raw)

---
 src/backend/executor/nodeBitmapHeapscan.c | 21 ++++++---------------
 1 file changed, 6 insertions(+), 15 deletions(-)

diff --git a/src/backend/executor/nodeBitmapHeapscan.c b/src/backend/executor/nodeBitmapHeapscan.c
index 83d6478bc2b..f2bb487bf10 100644
--- a/src/backend/executor/nodeBitmapHeapscan.c
+++ b/src/backend/executor/nodeBitmapHeapscan.c
@@ -79,7 +79,6 @@ typedef enum
 /* ----------------
  *	 ParallelBitmapHeapState information
  *		tbmiterator				iterator for scanning current pages
- *		mutex					mutual exclusion for state
  *		state					current state of the TIDBitmap
  *		cv						conditional wait variable
  * ----------------
@@ -87,8 +86,7 @@ typedef enum
 typedef struct ParallelBitmapHeapState
 {
 	dsa_pointer tbmiterator;
-	slock_t		mutex;
-	SharedBitmapState state;
+	pg_atomic_uint32 state;
 	ConditionVariable cv;
 } ParallelBitmapHeapState;
 
@@ -228,9 +226,7 @@ BitmapHeapNext(BitmapHeapScanState *node)
 static inline void
 BitmapDoneInitializingSharedState(ParallelBitmapHeapState *pstate)
 {
-	SpinLockAcquire(&pstate->mutex);
-	pstate->state = BM_FINISHED;
-	SpinLockRelease(&pstate->mutex);
+	pg_atomic_write_membarrier_u32(&pstate->state, BM_FINISHED);
 	ConditionVariableBroadcast(&pstate->cv);
 }
 
@@ -480,11 +476,8 @@ BitmapShouldInitializeSharedState(ParallelBitmapHeapState *pstate)
 
 	while (1)
 	{
-		SpinLockAcquire(&pstate->mutex);
-		state = pstate->state;
-		if (pstate->state == BM_INITIAL)
-			pstate->state = BM_INPROGRESS;
-		SpinLockRelease(&pstate->mutex);
+		state = BM_INITIAL;
+		pg_atomic_compare_exchange_u32(&pstate->state, &state, BM_INPROGRESS);
 
 		/* Exit if bitmap is done, or if we're the leader. */
 		if (state != BM_INPROGRESS)
@@ -538,9 +531,7 @@ ExecBitmapHeapInitializeDSM(BitmapHeapScanState *node,
 
 	pstate->tbmiterator = 0;
 
-	/* Initialize the mutex */
-	SpinLockInit(&pstate->mutex);
-	pstate->state = BM_INITIAL;
+	pg_atomic_init_u32(&pstate->state, BM_INITIAL);
 
 	ConditionVariableInit(&pstate->cv);
 
@@ -565,7 +556,7 @@ ExecBitmapHeapReInitializeDSM(BitmapHeapScanState *node,
 	if (dsa == NULL)
 		return;
 
-	pstate->state = BM_INITIAL;
+	pg_atomic_write_u32(&pstate->state, BM_INITIAL);
 
 	if (DsaPointerIsValid(pstate->tbmiterator))
 		tbm_free_shared_area(dsa, pstate->tbmiterator);
-- 
2.50.1 (Apple Git-155)


--Ot5x3ffkWEuxilWO
Content-Type: text/plain; charset=us-ascii
Content-Disposition: attachment;
	filename=v1-0003-convert-FixedParallelState-last_xlog_end-to-an-at.patch



^ permalink  raw  reply  [nested|flat] 440+ messages in thread

* [PATCH v1 2/8] convert ParallelBitmapHeapState->state to an atomic
@ 2026-07-09 18:38 Nathan Bossart <nathan@postgresql.org>
  0 siblings, 0 replies; 440+ messages in thread

From: Nathan Bossart @ 2026-07-09 18:38 UTC (permalink / raw)

---
 src/backend/executor/nodeBitmapHeapscan.c | 21 ++++++---------------
 1 file changed, 6 insertions(+), 15 deletions(-)

diff --git a/src/backend/executor/nodeBitmapHeapscan.c b/src/backend/executor/nodeBitmapHeapscan.c
index 83d6478bc2b..f2bb487bf10 100644
--- a/src/backend/executor/nodeBitmapHeapscan.c
+++ b/src/backend/executor/nodeBitmapHeapscan.c
@@ -79,7 +79,6 @@ typedef enum
 /* ----------------
  *	 ParallelBitmapHeapState information
  *		tbmiterator				iterator for scanning current pages
- *		mutex					mutual exclusion for state
  *		state					current state of the TIDBitmap
  *		cv						conditional wait variable
  * ----------------
@@ -87,8 +86,7 @@ typedef enum
 typedef struct ParallelBitmapHeapState
 {
 	dsa_pointer tbmiterator;
-	slock_t		mutex;
-	SharedBitmapState state;
+	pg_atomic_uint32 state;
 	ConditionVariable cv;
 } ParallelBitmapHeapState;
 
@@ -228,9 +226,7 @@ BitmapHeapNext(BitmapHeapScanState *node)
 static inline void
 BitmapDoneInitializingSharedState(ParallelBitmapHeapState *pstate)
 {
-	SpinLockAcquire(&pstate->mutex);
-	pstate->state = BM_FINISHED;
-	SpinLockRelease(&pstate->mutex);
+	pg_atomic_write_membarrier_u32(&pstate->state, BM_FINISHED);
 	ConditionVariableBroadcast(&pstate->cv);
 }
 
@@ -480,11 +476,8 @@ BitmapShouldInitializeSharedState(ParallelBitmapHeapState *pstate)
 
 	while (1)
 	{
-		SpinLockAcquire(&pstate->mutex);
-		state = pstate->state;
-		if (pstate->state == BM_INITIAL)
-			pstate->state = BM_INPROGRESS;
-		SpinLockRelease(&pstate->mutex);
+		state = BM_INITIAL;
+		pg_atomic_compare_exchange_u32(&pstate->state, &state, BM_INPROGRESS);
 
 		/* Exit if bitmap is done, or if we're the leader. */
 		if (state != BM_INPROGRESS)
@@ -538,9 +531,7 @@ ExecBitmapHeapInitializeDSM(BitmapHeapScanState *node,
 
 	pstate->tbmiterator = 0;
 
-	/* Initialize the mutex */
-	SpinLockInit(&pstate->mutex);
-	pstate->state = BM_INITIAL;
+	pg_atomic_init_u32(&pstate->state, BM_INITIAL);
 
 	ConditionVariableInit(&pstate->cv);
 
@@ -565,7 +556,7 @@ ExecBitmapHeapReInitializeDSM(BitmapHeapScanState *node,
 	if (dsa == NULL)
 		return;
 
-	pstate->state = BM_INITIAL;
+	pg_atomic_write_u32(&pstate->state, BM_INITIAL);
 
 	if (DsaPointerIsValid(pstate->tbmiterator))
 		tbm_free_shared_area(dsa, pstate->tbmiterator);
-- 
2.50.1 (Apple Git-155)


--Ot5x3ffkWEuxilWO
Content-Type: text/plain; charset=us-ascii
Content-Disposition: attachment;
	filename=v1-0003-convert-FixedParallelState-last_xlog_end-to-an-at.patch



^ permalink  raw  reply  [nested|flat] 440+ messages in thread

* [PATCH v1 2/8] convert ParallelBitmapHeapState->state to an atomic
@ 2026-07-09 18:38 Nathan Bossart <nathan@postgresql.org>
  0 siblings, 0 replies; 440+ messages in thread

From: Nathan Bossart @ 2026-07-09 18:38 UTC (permalink / raw)

---
 src/backend/executor/nodeBitmapHeapscan.c | 21 ++++++---------------
 1 file changed, 6 insertions(+), 15 deletions(-)

diff --git a/src/backend/executor/nodeBitmapHeapscan.c b/src/backend/executor/nodeBitmapHeapscan.c
index 83d6478bc2b..f2bb487bf10 100644
--- a/src/backend/executor/nodeBitmapHeapscan.c
+++ b/src/backend/executor/nodeBitmapHeapscan.c
@@ -79,7 +79,6 @@ typedef enum
 /* ----------------
  *	 ParallelBitmapHeapState information
  *		tbmiterator				iterator for scanning current pages
- *		mutex					mutual exclusion for state
  *		state					current state of the TIDBitmap
  *		cv						conditional wait variable
  * ----------------
@@ -87,8 +86,7 @@ typedef enum
 typedef struct ParallelBitmapHeapState
 {
 	dsa_pointer tbmiterator;
-	slock_t		mutex;
-	SharedBitmapState state;
+	pg_atomic_uint32 state;
 	ConditionVariable cv;
 } ParallelBitmapHeapState;
 
@@ -228,9 +226,7 @@ BitmapHeapNext(BitmapHeapScanState *node)
 static inline void
 BitmapDoneInitializingSharedState(ParallelBitmapHeapState *pstate)
 {
-	SpinLockAcquire(&pstate->mutex);
-	pstate->state = BM_FINISHED;
-	SpinLockRelease(&pstate->mutex);
+	pg_atomic_write_membarrier_u32(&pstate->state, BM_FINISHED);
 	ConditionVariableBroadcast(&pstate->cv);
 }
 
@@ -480,11 +476,8 @@ BitmapShouldInitializeSharedState(ParallelBitmapHeapState *pstate)
 
 	while (1)
 	{
-		SpinLockAcquire(&pstate->mutex);
-		state = pstate->state;
-		if (pstate->state == BM_INITIAL)
-			pstate->state = BM_INPROGRESS;
-		SpinLockRelease(&pstate->mutex);
+		state = BM_INITIAL;
+		pg_atomic_compare_exchange_u32(&pstate->state, &state, BM_INPROGRESS);
 
 		/* Exit if bitmap is done, or if we're the leader. */
 		if (state != BM_INPROGRESS)
@@ -538,9 +531,7 @@ ExecBitmapHeapInitializeDSM(BitmapHeapScanState *node,
 
 	pstate->tbmiterator = 0;
 
-	/* Initialize the mutex */
-	SpinLockInit(&pstate->mutex);
-	pstate->state = BM_INITIAL;
+	pg_atomic_init_u32(&pstate->state, BM_INITIAL);
 
 	ConditionVariableInit(&pstate->cv);
 
@@ -565,7 +556,7 @@ ExecBitmapHeapReInitializeDSM(BitmapHeapScanState *node,
 	if (dsa == NULL)
 		return;
 
-	pstate->state = BM_INITIAL;
+	pg_atomic_write_u32(&pstate->state, BM_INITIAL);
 
 	if (DsaPointerIsValid(pstate->tbmiterator))
 		tbm_free_shared_area(dsa, pstate->tbmiterator);
-- 
2.50.1 (Apple Git-155)


--Ot5x3ffkWEuxilWO
Content-Type: text/plain; charset=us-ascii
Content-Disposition: attachment;
	filename=v1-0003-convert-FixedParallelState-last_xlog_end-to-an-at.patch



^ permalink  raw  reply  [nested|flat] 440+ messages in thread

* [PATCH v1 2/8] convert ParallelBitmapHeapState->state to an atomic
@ 2026-07-09 18:38 Nathan Bossart <nathan@postgresql.org>
  0 siblings, 0 replies; 440+ messages in thread

From: Nathan Bossart @ 2026-07-09 18:38 UTC (permalink / raw)

---
 src/backend/executor/nodeBitmapHeapscan.c | 21 ++++++---------------
 1 file changed, 6 insertions(+), 15 deletions(-)

diff --git a/src/backend/executor/nodeBitmapHeapscan.c b/src/backend/executor/nodeBitmapHeapscan.c
index 83d6478bc2b..f2bb487bf10 100644
--- a/src/backend/executor/nodeBitmapHeapscan.c
+++ b/src/backend/executor/nodeBitmapHeapscan.c
@@ -79,7 +79,6 @@ typedef enum
 /* ----------------
  *	 ParallelBitmapHeapState information
  *		tbmiterator				iterator for scanning current pages
- *		mutex					mutual exclusion for state
  *		state					current state of the TIDBitmap
  *		cv						conditional wait variable
  * ----------------
@@ -87,8 +86,7 @@ typedef enum
 typedef struct ParallelBitmapHeapState
 {
 	dsa_pointer tbmiterator;
-	slock_t		mutex;
-	SharedBitmapState state;
+	pg_atomic_uint32 state;
 	ConditionVariable cv;
 } ParallelBitmapHeapState;
 
@@ -228,9 +226,7 @@ BitmapHeapNext(BitmapHeapScanState *node)
 static inline void
 BitmapDoneInitializingSharedState(ParallelBitmapHeapState *pstate)
 {
-	SpinLockAcquire(&pstate->mutex);
-	pstate->state = BM_FINISHED;
-	SpinLockRelease(&pstate->mutex);
+	pg_atomic_write_membarrier_u32(&pstate->state, BM_FINISHED);
 	ConditionVariableBroadcast(&pstate->cv);
 }
 
@@ -480,11 +476,8 @@ BitmapShouldInitializeSharedState(ParallelBitmapHeapState *pstate)
 
 	while (1)
 	{
-		SpinLockAcquire(&pstate->mutex);
-		state = pstate->state;
-		if (pstate->state == BM_INITIAL)
-			pstate->state = BM_INPROGRESS;
-		SpinLockRelease(&pstate->mutex);
+		state = BM_INITIAL;
+		pg_atomic_compare_exchange_u32(&pstate->state, &state, BM_INPROGRESS);
 
 		/* Exit if bitmap is done, or if we're the leader. */
 		if (state != BM_INPROGRESS)
@@ -538,9 +531,7 @@ ExecBitmapHeapInitializeDSM(BitmapHeapScanState *node,
 
 	pstate->tbmiterator = 0;
 
-	/* Initialize the mutex */
-	SpinLockInit(&pstate->mutex);
-	pstate->state = BM_INITIAL;
+	pg_atomic_init_u32(&pstate->state, BM_INITIAL);
 
 	ConditionVariableInit(&pstate->cv);
 
@@ -565,7 +556,7 @@ ExecBitmapHeapReInitializeDSM(BitmapHeapScanState *node,
 	if (dsa == NULL)
 		return;
 
-	pstate->state = BM_INITIAL;
+	pg_atomic_write_u32(&pstate->state, BM_INITIAL);
 
 	if (DsaPointerIsValid(pstate->tbmiterator))
 		tbm_free_shared_area(dsa, pstate->tbmiterator);
-- 
2.50.1 (Apple Git-155)


--Ot5x3ffkWEuxilWO
Content-Type: text/plain; charset=us-ascii
Content-Disposition: attachment;
	filename=v1-0003-convert-FixedParallelState-last_xlog_end-to-an-at.patch



^ permalink  raw  reply  [nested|flat] 440+ messages in thread

* [PATCH v1 2/8] convert ParallelBitmapHeapState->state to an atomic
@ 2026-07-09 18:38 Nathan Bossart <nathan@postgresql.org>
  0 siblings, 0 replies; 440+ messages in thread

From: Nathan Bossart @ 2026-07-09 18:38 UTC (permalink / raw)

---
 src/backend/executor/nodeBitmapHeapscan.c | 21 ++++++---------------
 1 file changed, 6 insertions(+), 15 deletions(-)

diff --git a/src/backend/executor/nodeBitmapHeapscan.c b/src/backend/executor/nodeBitmapHeapscan.c
index 83d6478bc2b..f2bb487bf10 100644
--- a/src/backend/executor/nodeBitmapHeapscan.c
+++ b/src/backend/executor/nodeBitmapHeapscan.c
@@ -79,7 +79,6 @@ typedef enum
 /* ----------------
  *	 ParallelBitmapHeapState information
  *		tbmiterator				iterator for scanning current pages
- *		mutex					mutual exclusion for state
  *		state					current state of the TIDBitmap
  *		cv						conditional wait variable
  * ----------------
@@ -87,8 +86,7 @@ typedef enum
 typedef struct ParallelBitmapHeapState
 {
 	dsa_pointer tbmiterator;
-	slock_t		mutex;
-	SharedBitmapState state;
+	pg_atomic_uint32 state;
 	ConditionVariable cv;
 } ParallelBitmapHeapState;
 
@@ -228,9 +226,7 @@ BitmapHeapNext(BitmapHeapScanState *node)
 static inline void
 BitmapDoneInitializingSharedState(ParallelBitmapHeapState *pstate)
 {
-	SpinLockAcquire(&pstate->mutex);
-	pstate->state = BM_FINISHED;
-	SpinLockRelease(&pstate->mutex);
+	pg_atomic_write_membarrier_u32(&pstate->state, BM_FINISHED);
 	ConditionVariableBroadcast(&pstate->cv);
 }
 
@@ -480,11 +476,8 @@ BitmapShouldInitializeSharedState(ParallelBitmapHeapState *pstate)
 
 	while (1)
 	{
-		SpinLockAcquire(&pstate->mutex);
-		state = pstate->state;
-		if (pstate->state == BM_INITIAL)
-			pstate->state = BM_INPROGRESS;
-		SpinLockRelease(&pstate->mutex);
+		state = BM_INITIAL;
+		pg_atomic_compare_exchange_u32(&pstate->state, &state, BM_INPROGRESS);
 
 		/* Exit if bitmap is done, or if we're the leader. */
 		if (state != BM_INPROGRESS)
@@ -538,9 +531,7 @@ ExecBitmapHeapInitializeDSM(BitmapHeapScanState *node,
 
 	pstate->tbmiterator = 0;
 
-	/* Initialize the mutex */
-	SpinLockInit(&pstate->mutex);
-	pstate->state = BM_INITIAL;
+	pg_atomic_init_u32(&pstate->state, BM_INITIAL);
 
 	ConditionVariableInit(&pstate->cv);
 
@@ -565,7 +556,7 @@ ExecBitmapHeapReInitializeDSM(BitmapHeapScanState *node,
 	if (dsa == NULL)
 		return;
 
-	pstate->state = BM_INITIAL;
+	pg_atomic_write_u32(&pstate->state, BM_INITIAL);
 
 	if (DsaPointerIsValid(pstate->tbmiterator))
 		tbm_free_shared_area(dsa, pstate->tbmiterator);
-- 
2.50.1 (Apple Git-155)


--Ot5x3ffkWEuxilWO
Content-Type: text/plain; charset=us-ascii
Content-Disposition: attachment;
	filename=v1-0003-convert-FixedParallelState-last_xlog_end-to-an-at.patch



^ permalink  raw  reply  [nested|flat] 440+ messages in thread

* [PATCH v1 2/8] convert ParallelBitmapHeapState->state to an atomic
@ 2026-07-09 18:38 Nathan Bossart <nathan@postgresql.org>
  0 siblings, 0 replies; 440+ messages in thread

From: Nathan Bossart @ 2026-07-09 18:38 UTC (permalink / raw)

---
 src/backend/executor/nodeBitmapHeapscan.c | 21 ++++++---------------
 1 file changed, 6 insertions(+), 15 deletions(-)

diff --git a/src/backend/executor/nodeBitmapHeapscan.c b/src/backend/executor/nodeBitmapHeapscan.c
index 83d6478bc2b..f2bb487bf10 100644
--- a/src/backend/executor/nodeBitmapHeapscan.c
+++ b/src/backend/executor/nodeBitmapHeapscan.c
@@ -79,7 +79,6 @@ typedef enum
 /* ----------------
  *	 ParallelBitmapHeapState information
  *		tbmiterator				iterator for scanning current pages
- *		mutex					mutual exclusion for state
  *		state					current state of the TIDBitmap
  *		cv						conditional wait variable
  * ----------------
@@ -87,8 +86,7 @@ typedef enum
 typedef struct ParallelBitmapHeapState
 {
 	dsa_pointer tbmiterator;
-	slock_t		mutex;
-	SharedBitmapState state;
+	pg_atomic_uint32 state;
 	ConditionVariable cv;
 } ParallelBitmapHeapState;
 
@@ -228,9 +226,7 @@ BitmapHeapNext(BitmapHeapScanState *node)
 static inline void
 BitmapDoneInitializingSharedState(ParallelBitmapHeapState *pstate)
 {
-	SpinLockAcquire(&pstate->mutex);
-	pstate->state = BM_FINISHED;
-	SpinLockRelease(&pstate->mutex);
+	pg_atomic_write_membarrier_u32(&pstate->state, BM_FINISHED);
 	ConditionVariableBroadcast(&pstate->cv);
 }
 
@@ -480,11 +476,8 @@ BitmapShouldInitializeSharedState(ParallelBitmapHeapState *pstate)
 
 	while (1)
 	{
-		SpinLockAcquire(&pstate->mutex);
-		state = pstate->state;
-		if (pstate->state == BM_INITIAL)
-			pstate->state = BM_INPROGRESS;
-		SpinLockRelease(&pstate->mutex);
+		state = BM_INITIAL;
+		pg_atomic_compare_exchange_u32(&pstate->state, &state, BM_INPROGRESS);
 
 		/* Exit if bitmap is done, or if we're the leader. */
 		if (state != BM_INPROGRESS)
@@ -538,9 +531,7 @@ ExecBitmapHeapInitializeDSM(BitmapHeapScanState *node,
 
 	pstate->tbmiterator = 0;
 
-	/* Initialize the mutex */
-	SpinLockInit(&pstate->mutex);
-	pstate->state = BM_INITIAL;
+	pg_atomic_init_u32(&pstate->state, BM_INITIAL);
 
 	ConditionVariableInit(&pstate->cv);
 
@@ -565,7 +556,7 @@ ExecBitmapHeapReInitializeDSM(BitmapHeapScanState *node,
 	if (dsa == NULL)
 		return;
 
-	pstate->state = BM_INITIAL;
+	pg_atomic_write_u32(&pstate->state, BM_INITIAL);
 
 	if (DsaPointerIsValid(pstate->tbmiterator))
 		tbm_free_shared_area(dsa, pstate->tbmiterator);
-- 
2.50.1 (Apple Git-155)


--Ot5x3ffkWEuxilWO
Content-Type: text/plain; charset=us-ascii
Content-Disposition: attachment;
	filename=v1-0003-convert-FixedParallelState-last_xlog_end-to-an-at.patch



^ permalink  raw  reply  [nested|flat] 440+ messages in thread

* [PATCH v1 2/8] convert ParallelBitmapHeapState->state to an atomic
@ 2026-07-09 18:38 Nathan Bossart <nathan@postgresql.org>
  0 siblings, 0 replies; 440+ messages in thread

From: Nathan Bossart @ 2026-07-09 18:38 UTC (permalink / raw)

---
 src/backend/executor/nodeBitmapHeapscan.c | 21 ++++++---------------
 1 file changed, 6 insertions(+), 15 deletions(-)

diff --git a/src/backend/executor/nodeBitmapHeapscan.c b/src/backend/executor/nodeBitmapHeapscan.c
index 83d6478bc2b..f2bb487bf10 100644
--- a/src/backend/executor/nodeBitmapHeapscan.c
+++ b/src/backend/executor/nodeBitmapHeapscan.c
@@ -79,7 +79,6 @@ typedef enum
 /* ----------------
  *	 ParallelBitmapHeapState information
  *		tbmiterator				iterator for scanning current pages
- *		mutex					mutual exclusion for state
  *		state					current state of the TIDBitmap
  *		cv						conditional wait variable
  * ----------------
@@ -87,8 +86,7 @@ typedef enum
 typedef struct ParallelBitmapHeapState
 {
 	dsa_pointer tbmiterator;
-	slock_t		mutex;
-	SharedBitmapState state;
+	pg_atomic_uint32 state;
 	ConditionVariable cv;
 } ParallelBitmapHeapState;
 
@@ -228,9 +226,7 @@ BitmapHeapNext(BitmapHeapScanState *node)
 static inline void
 BitmapDoneInitializingSharedState(ParallelBitmapHeapState *pstate)
 {
-	SpinLockAcquire(&pstate->mutex);
-	pstate->state = BM_FINISHED;
-	SpinLockRelease(&pstate->mutex);
+	pg_atomic_write_membarrier_u32(&pstate->state, BM_FINISHED);
 	ConditionVariableBroadcast(&pstate->cv);
 }
 
@@ -480,11 +476,8 @@ BitmapShouldInitializeSharedState(ParallelBitmapHeapState *pstate)
 
 	while (1)
 	{
-		SpinLockAcquire(&pstate->mutex);
-		state = pstate->state;
-		if (pstate->state == BM_INITIAL)
-			pstate->state = BM_INPROGRESS;
-		SpinLockRelease(&pstate->mutex);
+		state = BM_INITIAL;
+		pg_atomic_compare_exchange_u32(&pstate->state, &state, BM_INPROGRESS);
 
 		/* Exit if bitmap is done, or if we're the leader. */
 		if (state != BM_INPROGRESS)
@@ -538,9 +531,7 @@ ExecBitmapHeapInitializeDSM(BitmapHeapScanState *node,
 
 	pstate->tbmiterator = 0;
 
-	/* Initialize the mutex */
-	SpinLockInit(&pstate->mutex);
-	pstate->state = BM_INITIAL;
+	pg_atomic_init_u32(&pstate->state, BM_INITIAL);
 
 	ConditionVariableInit(&pstate->cv);
 
@@ -565,7 +556,7 @@ ExecBitmapHeapReInitializeDSM(BitmapHeapScanState *node,
 	if (dsa == NULL)
 		return;
 
-	pstate->state = BM_INITIAL;
+	pg_atomic_write_u32(&pstate->state, BM_INITIAL);
 
 	if (DsaPointerIsValid(pstate->tbmiterator))
 		tbm_free_shared_area(dsa, pstate->tbmiterator);
-- 
2.50.1 (Apple Git-155)


--Ot5x3ffkWEuxilWO
Content-Type: text/plain; charset=us-ascii
Content-Disposition: attachment;
	filename=v1-0003-convert-FixedParallelState-last_xlog_end-to-an-at.patch



^ permalink  raw  reply  [nested|flat] 440+ messages in thread

* [PATCH v2 2/9] convert ParallelBitmapHeapState->state to an atomic
@ 2026-07-09 18:38 Nathan Bossart <nathan@postgresql.org>
  0 siblings, 0 replies; 440+ messages in thread

From: Nathan Bossart @ 2026-07-09 18:38 UTC (permalink / raw)

---
 src/backend/executor/nodeBitmapHeapscan.c | 23 +++++++----------------
 1 file changed, 7 insertions(+), 16 deletions(-)

diff --git a/src/backend/executor/nodeBitmapHeapscan.c b/src/backend/executor/nodeBitmapHeapscan.c
index 83d6478bc2b..a9e83f30687 100644
--- a/src/backend/executor/nodeBitmapHeapscan.c
+++ b/src/backend/executor/nodeBitmapHeapscan.c
@@ -79,7 +79,6 @@ typedef enum
 /* ----------------
  *	 ParallelBitmapHeapState information
  *		tbmiterator				iterator for scanning current pages
- *		mutex					mutual exclusion for state
  *		state					current state of the TIDBitmap
  *		cv						conditional wait variable
  * ----------------
@@ -87,8 +86,7 @@ typedef enum
 typedef struct ParallelBitmapHeapState
 {
 	dsa_pointer tbmiterator;
-	slock_t		mutex;
-	SharedBitmapState state;
+	pg_atomic_uint32 state;
 	ConditionVariable cv;
 } ParallelBitmapHeapState;
 
@@ -228,9 +226,7 @@ BitmapHeapNext(BitmapHeapScanState *node)
 static inline void
 BitmapDoneInitializingSharedState(ParallelBitmapHeapState *pstate)
 {
-	SpinLockAcquire(&pstate->mutex);
-	pstate->state = BM_FINISHED;
-	SpinLockRelease(&pstate->mutex);
+	pg_atomic_write_membarrier_u32(&pstate->state, BM_FINISHED);
 	ConditionVariableBroadcast(&pstate->cv);
 }
 
@@ -476,15 +472,12 @@ ExecInitBitmapHeapScan(BitmapHeapScan *node, EState *estate, int eflags)
 static bool
 BitmapShouldInitializeSharedState(ParallelBitmapHeapState *pstate)
 {
-	SharedBitmapState state;
+	uint32		state;
 
 	while (1)
 	{
-		SpinLockAcquire(&pstate->mutex);
-		state = pstate->state;
-		if (pstate->state == BM_INITIAL)
-			pstate->state = BM_INPROGRESS;
-		SpinLockRelease(&pstate->mutex);
+		state = BM_INITIAL;
+		pg_atomic_compare_exchange_u32(&pstate->state, &state, BM_INPROGRESS);
 
 		/* Exit if bitmap is done, or if we're the leader. */
 		if (state != BM_INPROGRESS)
@@ -538,9 +531,7 @@ ExecBitmapHeapInitializeDSM(BitmapHeapScanState *node,
 
 	pstate->tbmiterator = 0;
 
-	/* Initialize the mutex */
-	SpinLockInit(&pstate->mutex);
-	pstate->state = BM_INITIAL;
+	pg_atomic_init_u32(&pstate->state, BM_INITIAL);
 
 	ConditionVariableInit(&pstate->cv);
 
@@ -565,7 +556,7 @@ ExecBitmapHeapReInitializeDSM(BitmapHeapScanState *node,
 	if (dsa == NULL)
 		return;
 
-	pstate->state = BM_INITIAL;
+	pg_atomic_write_u32(&pstate->state, BM_INITIAL);
 
 	if (DsaPointerIsValid(pstate->tbmiterator))
 		tbm_free_shared_area(dsa, pstate->tbmiterator);
-- 
2.50.1 (Apple Git-155)


--Xf36GNcW+0xZNily
Content-Type: text/plain; charset=us-ascii
Content-Disposition: attachment;
	filename=v2-0003-convert-FixedParallelState-last_xlog_end-to-an-at.patch



^ permalink  raw  reply  [nested|flat] 440+ messages in thread

* [PATCH v2 2/9] convert ParallelBitmapHeapState->state to an atomic
@ 2026-07-09 18:38 Nathan Bossart <nathan@postgresql.org>
  0 siblings, 0 replies; 440+ messages in thread

From: Nathan Bossart @ 2026-07-09 18:38 UTC (permalink / raw)

---
 src/backend/executor/nodeBitmapHeapscan.c | 23 +++++++----------------
 1 file changed, 7 insertions(+), 16 deletions(-)

diff --git a/src/backend/executor/nodeBitmapHeapscan.c b/src/backend/executor/nodeBitmapHeapscan.c
index 83d6478bc2b..a9e83f30687 100644
--- a/src/backend/executor/nodeBitmapHeapscan.c
+++ b/src/backend/executor/nodeBitmapHeapscan.c
@@ -79,7 +79,6 @@ typedef enum
 /* ----------------
  *	 ParallelBitmapHeapState information
  *		tbmiterator				iterator for scanning current pages
- *		mutex					mutual exclusion for state
  *		state					current state of the TIDBitmap
  *		cv						conditional wait variable
  * ----------------
@@ -87,8 +86,7 @@ typedef enum
 typedef struct ParallelBitmapHeapState
 {
 	dsa_pointer tbmiterator;
-	slock_t		mutex;
-	SharedBitmapState state;
+	pg_atomic_uint32 state;
 	ConditionVariable cv;
 } ParallelBitmapHeapState;
 
@@ -228,9 +226,7 @@ BitmapHeapNext(BitmapHeapScanState *node)
 static inline void
 BitmapDoneInitializingSharedState(ParallelBitmapHeapState *pstate)
 {
-	SpinLockAcquire(&pstate->mutex);
-	pstate->state = BM_FINISHED;
-	SpinLockRelease(&pstate->mutex);
+	pg_atomic_write_membarrier_u32(&pstate->state, BM_FINISHED);
 	ConditionVariableBroadcast(&pstate->cv);
 }
 
@@ -476,15 +472,12 @@ ExecInitBitmapHeapScan(BitmapHeapScan *node, EState *estate, int eflags)
 static bool
 BitmapShouldInitializeSharedState(ParallelBitmapHeapState *pstate)
 {
-	SharedBitmapState state;
+	uint32		state;
 
 	while (1)
 	{
-		SpinLockAcquire(&pstate->mutex);
-		state = pstate->state;
-		if (pstate->state == BM_INITIAL)
-			pstate->state = BM_INPROGRESS;
-		SpinLockRelease(&pstate->mutex);
+		state = BM_INITIAL;
+		pg_atomic_compare_exchange_u32(&pstate->state, &state, BM_INPROGRESS);
 
 		/* Exit if bitmap is done, or if we're the leader. */
 		if (state != BM_INPROGRESS)
@@ -538,9 +531,7 @@ ExecBitmapHeapInitializeDSM(BitmapHeapScanState *node,
 
 	pstate->tbmiterator = 0;
 
-	/* Initialize the mutex */
-	SpinLockInit(&pstate->mutex);
-	pstate->state = BM_INITIAL;
+	pg_atomic_init_u32(&pstate->state, BM_INITIAL);
 
 	ConditionVariableInit(&pstate->cv);
 
@@ -565,7 +556,7 @@ ExecBitmapHeapReInitializeDSM(BitmapHeapScanState *node,
 	if (dsa == NULL)
 		return;
 
-	pstate->state = BM_INITIAL;
+	pg_atomic_write_u32(&pstate->state, BM_INITIAL);
 
 	if (DsaPointerIsValid(pstate->tbmiterator))
 		tbm_free_shared_area(dsa, pstate->tbmiterator);
-- 
2.50.1 (Apple Git-155)


--Xf36GNcW+0xZNily
Content-Type: text/plain; charset=us-ascii
Content-Disposition: attachment;
	filename=v2-0003-convert-FixedParallelState-last_xlog_end-to-an-at.patch



^ permalink  raw  reply  [nested|flat] 440+ messages in thread

* [PATCH v2 2/9] convert ParallelBitmapHeapState->state to an atomic
@ 2026-07-09 18:38 Nathan Bossart <nathan@postgresql.org>
  0 siblings, 0 replies; 440+ messages in thread

From: Nathan Bossart @ 2026-07-09 18:38 UTC (permalink / raw)

---
 src/backend/executor/nodeBitmapHeapscan.c | 23 +++++++----------------
 1 file changed, 7 insertions(+), 16 deletions(-)

diff --git a/src/backend/executor/nodeBitmapHeapscan.c b/src/backend/executor/nodeBitmapHeapscan.c
index 83d6478bc2b..a9e83f30687 100644
--- a/src/backend/executor/nodeBitmapHeapscan.c
+++ b/src/backend/executor/nodeBitmapHeapscan.c
@@ -79,7 +79,6 @@ typedef enum
 /* ----------------
  *	 ParallelBitmapHeapState information
  *		tbmiterator				iterator for scanning current pages
- *		mutex					mutual exclusion for state
  *		state					current state of the TIDBitmap
  *		cv						conditional wait variable
  * ----------------
@@ -87,8 +86,7 @@ typedef enum
 typedef struct ParallelBitmapHeapState
 {
 	dsa_pointer tbmiterator;
-	slock_t		mutex;
-	SharedBitmapState state;
+	pg_atomic_uint32 state;
 	ConditionVariable cv;
 } ParallelBitmapHeapState;
 
@@ -228,9 +226,7 @@ BitmapHeapNext(BitmapHeapScanState *node)
 static inline void
 BitmapDoneInitializingSharedState(ParallelBitmapHeapState *pstate)
 {
-	SpinLockAcquire(&pstate->mutex);
-	pstate->state = BM_FINISHED;
-	SpinLockRelease(&pstate->mutex);
+	pg_atomic_write_membarrier_u32(&pstate->state, BM_FINISHED);
 	ConditionVariableBroadcast(&pstate->cv);
 }
 
@@ -476,15 +472,12 @@ ExecInitBitmapHeapScan(BitmapHeapScan *node, EState *estate, int eflags)
 static bool
 BitmapShouldInitializeSharedState(ParallelBitmapHeapState *pstate)
 {
-	SharedBitmapState state;
+	uint32		state;
 
 	while (1)
 	{
-		SpinLockAcquire(&pstate->mutex);
-		state = pstate->state;
-		if (pstate->state == BM_INITIAL)
-			pstate->state = BM_INPROGRESS;
-		SpinLockRelease(&pstate->mutex);
+		state = BM_INITIAL;
+		pg_atomic_compare_exchange_u32(&pstate->state, &state, BM_INPROGRESS);
 
 		/* Exit if bitmap is done, or if we're the leader. */
 		if (state != BM_INPROGRESS)
@@ -538,9 +531,7 @@ ExecBitmapHeapInitializeDSM(BitmapHeapScanState *node,
 
 	pstate->tbmiterator = 0;
 
-	/* Initialize the mutex */
-	SpinLockInit(&pstate->mutex);
-	pstate->state = BM_INITIAL;
+	pg_atomic_init_u32(&pstate->state, BM_INITIAL);
 
 	ConditionVariableInit(&pstate->cv);
 
@@ -565,7 +556,7 @@ ExecBitmapHeapReInitializeDSM(BitmapHeapScanState *node,
 	if (dsa == NULL)
 		return;
 
-	pstate->state = BM_INITIAL;
+	pg_atomic_write_u32(&pstate->state, BM_INITIAL);
 
 	if (DsaPointerIsValid(pstate->tbmiterator))
 		tbm_free_shared_area(dsa, pstate->tbmiterator);
-- 
2.50.1 (Apple Git-155)


--Xf36GNcW+0xZNily
Content-Type: text/plain; charset=us-ascii
Content-Disposition: attachment;
	filename=v2-0003-convert-FixedParallelState-last_xlog_end-to-an-at.patch



^ permalink  raw  reply  [nested|flat] 440+ messages in thread

* [PATCH v2 2/9] convert ParallelBitmapHeapState->state to an atomic
@ 2026-07-09 18:38 Nathan Bossart <nathan@postgresql.org>
  0 siblings, 0 replies; 440+ messages in thread

From: Nathan Bossart @ 2026-07-09 18:38 UTC (permalink / raw)

---
 src/backend/executor/nodeBitmapHeapscan.c | 23 +++++++----------------
 1 file changed, 7 insertions(+), 16 deletions(-)

diff --git a/src/backend/executor/nodeBitmapHeapscan.c b/src/backend/executor/nodeBitmapHeapscan.c
index 83d6478bc2b..a9e83f30687 100644
--- a/src/backend/executor/nodeBitmapHeapscan.c
+++ b/src/backend/executor/nodeBitmapHeapscan.c
@@ -79,7 +79,6 @@ typedef enum
 /* ----------------
  *	 ParallelBitmapHeapState information
  *		tbmiterator				iterator for scanning current pages
- *		mutex					mutual exclusion for state
  *		state					current state of the TIDBitmap
  *		cv						conditional wait variable
  * ----------------
@@ -87,8 +86,7 @@ typedef enum
 typedef struct ParallelBitmapHeapState
 {
 	dsa_pointer tbmiterator;
-	slock_t		mutex;
-	SharedBitmapState state;
+	pg_atomic_uint32 state;
 	ConditionVariable cv;
 } ParallelBitmapHeapState;
 
@@ -228,9 +226,7 @@ BitmapHeapNext(BitmapHeapScanState *node)
 static inline void
 BitmapDoneInitializingSharedState(ParallelBitmapHeapState *pstate)
 {
-	SpinLockAcquire(&pstate->mutex);
-	pstate->state = BM_FINISHED;
-	SpinLockRelease(&pstate->mutex);
+	pg_atomic_write_membarrier_u32(&pstate->state, BM_FINISHED);
 	ConditionVariableBroadcast(&pstate->cv);
 }
 
@@ -476,15 +472,12 @@ ExecInitBitmapHeapScan(BitmapHeapScan *node, EState *estate, int eflags)
 static bool
 BitmapShouldInitializeSharedState(ParallelBitmapHeapState *pstate)
 {
-	SharedBitmapState state;
+	uint32		state;
 
 	while (1)
 	{
-		SpinLockAcquire(&pstate->mutex);
-		state = pstate->state;
-		if (pstate->state == BM_INITIAL)
-			pstate->state = BM_INPROGRESS;
-		SpinLockRelease(&pstate->mutex);
+		state = BM_INITIAL;
+		pg_atomic_compare_exchange_u32(&pstate->state, &state, BM_INPROGRESS);
 
 		/* Exit if bitmap is done, or if we're the leader. */
 		if (state != BM_INPROGRESS)
@@ -538,9 +531,7 @@ ExecBitmapHeapInitializeDSM(BitmapHeapScanState *node,
 
 	pstate->tbmiterator = 0;
 
-	/* Initialize the mutex */
-	SpinLockInit(&pstate->mutex);
-	pstate->state = BM_INITIAL;
+	pg_atomic_init_u32(&pstate->state, BM_INITIAL);
 
 	ConditionVariableInit(&pstate->cv);
 
@@ -565,7 +556,7 @@ ExecBitmapHeapReInitializeDSM(BitmapHeapScanState *node,
 	if (dsa == NULL)
 		return;
 
-	pstate->state = BM_INITIAL;
+	pg_atomic_write_u32(&pstate->state, BM_INITIAL);
 
 	if (DsaPointerIsValid(pstate->tbmiterator))
 		tbm_free_shared_area(dsa, pstate->tbmiterator);
-- 
2.50.1 (Apple Git-155)


--Xf36GNcW+0xZNily
Content-Type: text/plain; charset=us-ascii
Content-Disposition: attachment;
	filename=v2-0003-convert-FixedParallelState-last_xlog_end-to-an-at.patch



^ permalink  raw  reply  [nested|flat] 440+ messages in thread

* [PATCH v2 2/9] convert ParallelBitmapHeapState->state to an atomic
@ 2026-07-09 18:38 Nathan Bossart <nathan@postgresql.org>
  0 siblings, 0 replies; 440+ messages in thread

From: Nathan Bossart @ 2026-07-09 18:38 UTC (permalink / raw)

---
 src/backend/executor/nodeBitmapHeapscan.c | 23 +++++++----------------
 1 file changed, 7 insertions(+), 16 deletions(-)

diff --git a/src/backend/executor/nodeBitmapHeapscan.c b/src/backend/executor/nodeBitmapHeapscan.c
index 83d6478bc2b..a9e83f30687 100644
--- a/src/backend/executor/nodeBitmapHeapscan.c
+++ b/src/backend/executor/nodeBitmapHeapscan.c
@@ -79,7 +79,6 @@ typedef enum
 /* ----------------
  *	 ParallelBitmapHeapState information
  *		tbmiterator				iterator for scanning current pages
- *		mutex					mutual exclusion for state
  *		state					current state of the TIDBitmap
  *		cv						conditional wait variable
  * ----------------
@@ -87,8 +86,7 @@ typedef enum
 typedef struct ParallelBitmapHeapState
 {
 	dsa_pointer tbmiterator;
-	slock_t		mutex;
-	SharedBitmapState state;
+	pg_atomic_uint32 state;
 	ConditionVariable cv;
 } ParallelBitmapHeapState;
 
@@ -228,9 +226,7 @@ BitmapHeapNext(BitmapHeapScanState *node)
 static inline void
 BitmapDoneInitializingSharedState(ParallelBitmapHeapState *pstate)
 {
-	SpinLockAcquire(&pstate->mutex);
-	pstate->state = BM_FINISHED;
-	SpinLockRelease(&pstate->mutex);
+	pg_atomic_write_membarrier_u32(&pstate->state, BM_FINISHED);
 	ConditionVariableBroadcast(&pstate->cv);
 }
 
@@ -476,15 +472,12 @@ ExecInitBitmapHeapScan(BitmapHeapScan *node, EState *estate, int eflags)
 static bool
 BitmapShouldInitializeSharedState(ParallelBitmapHeapState *pstate)
 {
-	SharedBitmapState state;
+	uint32		state;
 
 	while (1)
 	{
-		SpinLockAcquire(&pstate->mutex);
-		state = pstate->state;
-		if (pstate->state == BM_INITIAL)
-			pstate->state = BM_INPROGRESS;
-		SpinLockRelease(&pstate->mutex);
+		state = BM_INITIAL;
+		pg_atomic_compare_exchange_u32(&pstate->state, &state, BM_INPROGRESS);
 
 		/* Exit if bitmap is done, or if we're the leader. */
 		if (state != BM_INPROGRESS)
@@ -538,9 +531,7 @@ ExecBitmapHeapInitializeDSM(BitmapHeapScanState *node,
 
 	pstate->tbmiterator = 0;
 
-	/* Initialize the mutex */
-	SpinLockInit(&pstate->mutex);
-	pstate->state = BM_INITIAL;
+	pg_atomic_init_u32(&pstate->state, BM_INITIAL);
 
 	ConditionVariableInit(&pstate->cv);
 
@@ -565,7 +556,7 @@ ExecBitmapHeapReInitializeDSM(BitmapHeapScanState *node,
 	if (dsa == NULL)
 		return;
 
-	pstate->state = BM_INITIAL;
+	pg_atomic_write_u32(&pstate->state, BM_INITIAL);
 
 	if (DsaPointerIsValid(pstate->tbmiterator))
 		tbm_free_shared_area(dsa, pstate->tbmiterator);
-- 
2.50.1 (Apple Git-155)


--Xf36GNcW+0xZNily
Content-Type: text/plain; charset=us-ascii
Content-Disposition: attachment;
	filename=v2-0003-convert-FixedParallelState-last_xlog_end-to-an-at.patch



^ permalink  raw  reply  [nested|flat] 440+ messages in thread

* [PATCH v1 2/8] convert ParallelBitmapHeapState->state to an atomic
@ 2026-07-09 18:38 Nathan Bossart <nathan@postgresql.org>
  0 siblings, 0 replies; 440+ messages in thread

From: Nathan Bossart @ 2026-07-09 18:38 UTC (permalink / raw)

---
 src/backend/executor/nodeBitmapHeapscan.c | 21 ++++++---------------
 1 file changed, 6 insertions(+), 15 deletions(-)

diff --git a/src/backend/executor/nodeBitmapHeapscan.c b/src/backend/executor/nodeBitmapHeapscan.c
index 83d6478bc2b..f2bb487bf10 100644
--- a/src/backend/executor/nodeBitmapHeapscan.c
+++ b/src/backend/executor/nodeBitmapHeapscan.c
@@ -79,7 +79,6 @@ typedef enum
 /* ----------------
  *	 ParallelBitmapHeapState information
  *		tbmiterator				iterator for scanning current pages
- *		mutex					mutual exclusion for state
  *		state					current state of the TIDBitmap
  *		cv						conditional wait variable
  * ----------------
@@ -87,8 +86,7 @@ typedef enum
 typedef struct ParallelBitmapHeapState
 {
 	dsa_pointer tbmiterator;
-	slock_t		mutex;
-	SharedBitmapState state;
+	pg_atomic_uint32 state;
 	ConditionVariable cv;
 } ParallelBitmapHeapState;
 
@@ -228,9 +226,7 @@ BitmapHeapNext(BitmapHeapScanState *node)
 static inline void
 BitmapDoneInitializingSharedState(ParallelBitmapHeapState *pstate)
 {
-	SpinLockAcquire(&pstate->mutex);
-	pstate->state = BM_FINISHED;
-	SpinLockRelease(&pstate->mutex);
+	pg_atomic_write_membarrier_u32(&pstate->state, BM_FINISHED);
 	ConditionVariableBroadcast(&pstate->cv);
 }
 
@@ -480,11 +476,8 @@ BitmapShouldInitializeSharedState(ParallelBitmapHeapState *pstate)
 
 	while (1)
 	{
-		SpinLockAcquire(&pstate->mutex);
-		state = pstate->state;
-		if (pstate->state == BM_INITIAL)
-			pstate->state = BM_INPROGRESS;
-		SpinLockRelease(&pstate->mutex);
+		state = BM_INITIAL;
+		pg_atomic_compare_exchange_u32(&pstate->state, &state, BM_INPROGRESS);
 
 		/* Exit if bitmap is done, or if we're the leader. */
 		if (state != BM_INPROGRESS)
@@ -538,9 +531,7 @@ ExecBitmapHeapInitializeDSM(BitmapHeapScanState *node,
 
 	pstate->tbmiterator = 0;
 
-	/* Initialize the mutex */
-	SpinLockInit(&pstate->mutex);
-	pstate->state = BM_INITIAL;
+	pg_atomic_init_u32(&pstate->state, BM_INITIAL);
 
 	ConditionVariableInit(&pstate->cv);
 
@@ -565,7 +556,7 @@ ExecBitmapHeapReInitializeDSM(BitmapHeapScanState *node,
 	if (dsa == NULL)
 		return;
 
-	pstate->state = BM_INITIAL;
+	pg_atomic_write_u32(&pstate->state, BM_INITIAL);
 
 	if (DsaPointerIsValid(pstate->tbmiterator))
 		tbm_free_shared_area(dsa, pstate->tbmiterator);
-- 
2.50.1 (Apple Git-155)


--Ot5x3ffkWEuxilWO
Content-Type: text/plain; charset=us-ascii
Content-Disposition: attachment;
	filename=v1-0003-convert-FixedParallelState-last_xlog_end-to-an-at.patch



^ permalink  raw  reply  [nested|flat] 440+ messages in thread

* [PATCH v1 2/8] convert ParallelBitmapHeapState->state to an atomic
@ 2026-07-09 18:38 Nathan Bossart <nathan@postgresql.org>
  0 siblings, 0 replies; 440+ messages in thread

From: Nathan Bossart @ 2026-07-09 18:38 UTC (permalink / raw)

---
 src/backend/executor/nodeBitmapHeapscan.c | 21 ++++++---------------
 1 file changed, 6 insertions(+), 15 deletions(-)

diff --git a/src/backend/executor/nodeBitmapHeapscan.c b/src/backend/executor/nodeBitmapHeapscan.c
index 83d6478bc2b..f2bb487bf10 100644
--- a/src/backend/executor/nodeBitmapHeapscan.c
+++ b/src/backend/executor/nodeBitmapHeapscan.c
@@ -79,7 +79,6 @@ typedef enum
 /* ----------------
  *	 ParallelBitmapHeapState information
  *		tbmiterator				iterator for scanning current pages
- *		mutex					mutual exclusion for state
  *		state					current state of the TIDBitmap
  *		cv						conditional wait variable
  * ----------------
@@ -87,8 +86,7 @@ typedef enum
 typedef struct ParallelBitmapHeapState
 {
 	dsa_pointer tbmiterator;
-	slock_t		mutex;
-	SharedBitmapState state;
+	pg_atomic_uint32 state;
 	ConditionVariable cv;
 } ParallelBitmapHeapState;
 
@@ -228,9 +226,7 @@ BitmapHeapNext(BitmapHeapScanState *node)
 static inline void
 BitmapDoneInitializingSharedState(ParallelBitmapHeapState *pstate)
 {
-	SpinLockAcquire(&pstate->mutex);
-	pstate->state = BM_FINISHED;
-	SpinLockRelease(&pstate->mutex);
+	pg_atomic_write_membarrier_u32(&pstate->state, BM_FINISHED);
 	ConditionVariableBroadcast(&pstate->cv);
 }
 
@@ -480,11 +476,8 @@ BitmapShouldInitializeSharedState(ParallelBitmapHeapState *pstate)
 
 	while (1)
 	{
-		SpinLockAcquire(&pstate->mutex);
-		state = pstate->state;
-		if (pstate->state == BM_INITIAL)
-			pstate->state = BM_INPROGRESS;
-		SpinLockRelease(&pstate->mutex);
+		state = BM_INITIAL;
+		pg_atomic_compare_exchange_u32(&pstate->state, &state, BM_INPROGRESS);
 
 		/* Exit if bitmap is done, or if we're the leader. */
 		if (state != BM_INPROGRESS)
@@ -538,9 +531,7 @@ ExecBitmapHeapInitializeDSM(BitmapHeapScanState *node,
 
 	pstate->tbmiterator = 0;
 
-	/* Initialize the mutex */
-	SpinLockInit(&pstate->mutex);
-	pstate->state = BM_INITIAL;
+	pg_atomic_init_u32(&pstate->state, BM_INITIAL);
 
 	ConditionVariableInit(&pstate->cv);
 
@@ -565,7 +556,7 @@ ExecBitmapHeapReInitializeDSM(BitmapHeapScanState *node,
 	if (dsa == NULL)
 		return;
 
-	pstate->state = BM_INITIAL;
+	pg_atomic_write_u32(&pstate->state, BM_INITIAL);
 
 	if (DsaPointerIsValid(pstate->tbmiterator))
 		tbm_free_shared_area(dsa, pstate->tbmiterator);
-- 
2.50.1 (Apple Git-155)


--Ot5x3ffkWEuxilWO
Content-Type: text/plain; charset=us-ascii
Content-Disposition: attachment;
	filename=v1-0003-convert-FixedParallelState-last_xlog_end-to-an-at.patch



^ permalink  raw  reply  [nested|flat] 440+ messages in thread

* [PATCH v1 2/8] convert ParallelBitmapHeapState->state to an atomic
@ 2026-07-09 18:38 Nathan Bossart <nathan@postgresql.org>
  0 siblings, 0 replies; 440+ messages in thread

From: Nathan Bossart @ 2026-07-09 18:38 UTC (permalink / raw)

---
 src/backend/executor/nodeBitmapHeapscan.c | 21 ++++++---------------
 1 file changed, 6 insertions(+), 15 deletions(-)

diff --git a/src/backend/executor/nodeBitmapHeapscan.c b/src/backend/executor/nodeBitmapHeapscan.c
index 83d6478bc2b..f2bb487bf10 100644
--- a/src/backend/executor/nodeBitmapHeapscan.c
+++ b/src/backend/executor/nodeBitmapHeapscan.c
@@ -79,7 +79,6 @@ typedef enum
 /* ----------------
  *	 ParallelBitmapHeapState information
  *		tbmiterator				iterator for scanning current pages
- *		mutex					mutual exclusion for state
  *		state					current state of the TIDBitmap
  *		cv						conditional wait variable
  * ----------------
@@ -87,8 +86,7 @@ typedef enum
 typedef struct ParallelBitmapHeapState
 {
 	dsa_pointer tbmiterator;
-	slock_t		mutex;
-	SharedBitmapState state;
+	pg_atomic_uint32 state;
 	ConditionVariable cv;
 } ParallelBitmapHeapState;
 
@@ -228,9 +226,7 @@ BitmapHeapNext(BitmapHeapScanState *node)
 static inline void
 BitmapDoneInitializingSharedState(ParallelBitmapHeapState *pstate)
 {
-	SpinLockAcquire(&pstate->mutex);
-	pstate->state = BM_FINISHED;
-	SpinLockRelease(&pstate->mutex);
+	pg_atomic_write_membarrier_u32(&pstate->state, BM_FINISHED);
 	ConditionVariableBroadcast(&pstate->cv);
 }
 
@@ -480,11 +476,8 @@ BitmapShouldInitializeSharedState(ParallelBitmapHeapState *pstate)
 
 	while (1)
 	{
-		SpinLockAcquire(&pstate->mutex);
-		state = pstate->state;
-		if (pstate->state == BM_INITIAL)
-			pstate->state = BM_INPROGRESS;
-		SpinLockRelease(&pstate->mutex);
+		state = BM_INITIAL;
+		pg_atomic_compare_exchange_u32(&pstate->state, &state, BM_INPROGRESS);
 
 		/* Exit if bitmap is done, or if we're the leader. */
 		if (state != BM_INPROGRESS)
@@ -538,9 +531,7 @@ ExecBitmapHeapInitializeDSM(BitmapHeapScanState *node,
 
 	pstate->tbmiterator = 0;
 
-	/* Initialize the mutex */
-	SpinLockInit(&pstate->mutex);
-	pstate->state = BM_INITIAL;
+	pg_atomic_init_u32(&pstate->state, BM_INITIAL);
 
 	ConditionVariableInit(&pstate->cv);
 
@@ -565,7 +556,7 @@ ExecBitmapHeapReInitializeDSM(BitmapHeapScanState *node,
 	if (dsa == NULL)
 		return;
 
-	pstate->state = BM_INITIAL;
+	pg_atomic_write_u32(&pstate->state, BM_INITIAL);
 
 	if (DsaPointerIsValid(pstate->tbmiterator))
 		tbm_free_shared_area(dsa, pstate->tbmiterator);
-- 
2.50.1 (Apple Git-155)


--Ot5x3ffkWEuxilWO
Content-Type: text/plain; charset=us-ascii
Content-Disposition: attachment;
	filename=v1-0003-convert-FixedParallelState-last_xlog_end-to-an-at.patch



^ permalink  raw  reply  [nested|flat] 440+ messages in thread

* [PATCH v1 2/8] convert ParallelBitmapHeapState->state to an atomic
@ 2026-07-09 18:38 Nathan Bossart <nathan@postgresql.org>
  0 siblings, 0 replies; 440+ messages in thread

From: Nathan Bossart @ 2026-07-09 18:38 UTC (permalink / raw)

---
 src/backend/executor/nodeBitmapHeapscan.c | 21 ++++++---------------
 1 file changed, 6 insertions(+), 15 deletions(-)

diff --git a/src/backend/executor/nodeBitmapHeapscan.c b/src/backend/executor/nodeBitmapHeapscan.c
index 83d6478bc2b..f2bb487bf10 100644
--- a/src/backend/executor/nodeBitmapHeapscan.c
+++ b/src/backend/executor/nodeBitmapHeapscan.c
@@ -79,7 +79,6 @@ typedef enum
 /* ----------------
  *	 ParallelBitmapHeapState information
  *		tbmiterator				iterator for scanning current pages
- *		mutex					mutual exclusion for state
  *		state					current state of the TIDBitmap
  *		cv						conditional wait variable
  * ----------------
@@ -87,8 +86,7 @@ typedef enum
 typedef struct ParallelBitmapHeapState
 {
 	dsa_pointer tbmiterator;
-	slock_t		mutex;
-	SharedBitmapState state;
+	pg_atomic_uint32 state;
 	ConditionVariable cv;
 } ParallelBitmapHeapState;
 
@@ -228,9 +226,7 @@ BitmapHeapNext(BitmapHeapScanState *node)
 static inline void
 BitmapDoneInitializingSharedState(ParallelBitmapHeapState *pstate)
 {
-	SpinLockAcquire(&pstate->mutex);
-	pstate->state = BM_FINISHED;
-	SpinLockRelease(&pstate->mutex);
+	pg_atomic_write_membarrier_u32(&pstate->state, BM_FINISHED);
 	ConditionVariableBroadcast(&pstate->cv);
 }
 
@@ -480,11 +476,8 @@ BitmapShouldInitializeSharedState(ParallelBitmapHeapState *pstate)
 
 	while (1)
 	{
-		SpinLockAcquire(&pstate->mutex);
-		state = pstate->state;
-		if (pstate->state == BM_INITIAL)
-			pstate->state = BM_INPROGRESS;
-		SpinLockRelease(&pstate->mutex);
+		state = BM_INITIAL;
+		pg_atomic_compare_exchange_u32(&pstate->state, &state, BM_INPROGRESS);
 
 		/* Exit if bitmap is done, or if we're the leader. */
 		if (state != BM_INPROGRESS)
@@ -538,9 +531,7 @@ ExecBitmapHeapInitializeDSM(BitmapHeapScanState *node,
 
 	pstate->tbmiterator = 0;
 
-	/* Initialize the mutex */
-	SpinLockInit(&pstate->mutex);
-	pstate->state = BM_INITIAL;
+	pg_atomic_init_u32(&pstate->state, BM_INITIAL);
 
 	ConditionVariableInit(&pstate->cv);
 
@@ -565,7 +556,7 @@ ExecBitmapHeapReInitializeDSM(BitmapHeapScanState *node,
 	if (dsa == NULL)
 		return;
 
-	pstate->state = BM_INITIAL;
+	pg_atomic_write_u32(&pstate->state, BM_INITIAL);
 
 	if (DsaPointerIsValid(pstate->tbmiterator))
 		tbm_free_shared_area(dsa, pstate->tbmiterator);
-- 
2.50.1 (Apple Git-155)


--Ot5x3ffkWEuxilWO
Content-Type: text/plain; charset=us-ascii
Content-Disposition: attachment;
	filename=v1-0003-convert-FixedParallelState-last_xlog_end-to-an-at.patch



^ permalink  raw  reply  [nested|flat] 440+ messages in thread

* [PATCH v2 2/9] convert ParallelBitmapHeapState->state to an atomic
@ 2026-07-09 18:38 Nathan Bossart <nathan@postgresql.org>
  0 siblings, 0 replies; 440+ messages in thread

From: Nathan Bossart @ 2026-07-09 18:38 UTC (permalink / raw)

---
 src/backend/executor/nodeBitmapHeapscan.c | 23 +++++++----------------
 1 file changed, 7 insertions(+), 16 deletions(-)

diff --git a/src/backend/executor/nodeBitmapHeapscan.c b/src/backend/executor/nodeBitmapHeapscan.c
index 83d6478bc2b..a9e83f30687 100644
--- a/src/backend/executor/nodeBitmapHeapscan.c
+++ b/src/backend/executor/nodeBitmapHeapscan.c
@@ -79,7 +79,6 @@ typedef enum
 /* ----------------
  *	 ParallelBitmapHeapState information
  *		tbmiterator				iterator for scanning current pages
- *		mutex					mutual exclusion for state
  *		state					current state of the TIDBitmap
  *		cv						conditional wait variable
  * ----------------
@@ -87,8 +86,7 @@ typedef enum
 typedef struct ParallelBitmapHeapState
 {
 	dsa_pointer tbmiterator;
-	slock_t		mutex;
-	SharedBitmapState state;
+	pg_atomic_uint32 state;
 	ConditionVariable cv;
 } ParallelBitmapHeapState;
 
@@ -228,9 +226,7 @@ BitmapHeapNext(BitmapHeapScanState *node)
 static inline void
 BitmapDoneInitializingSharedState(ParallelBitmapHeapState *pstate)
 {
-	SpinLockAcquire(&pstate->mutex);
-	pstate->state = BM_FINISHED;
-	SpinLockRelease(&pstate->mutex);
+	pg_atomic_write_membarrier_u32(&pstate->state, BM_FINISHED);
 	ConditionVariableBroadcast(&pstate->cv);
 }
 
@@ -476,15 +472,12 @@ ExecInitBitmapHeapScan(BitmapHeapScan *node, EState *estate, int eflags)
 static bool
 BitmapShouldInitializeSharedState(ParallelBitmapHeapState *pstate)
 {
-	SharedBitmapState state;
+	uint32		state;
 
 	while (1)
 	{
-		SpinLockAcquire(&pstate->mutex);
-		state = pstate->state;
-		if (pstate->state == BM_INITIAL)
-			pstate->state = BM_INPROGRESS;
-		SpinLockRelease(&pstate->mutex);
+		state = BM_INITIAL;
+		pg_atomic_compare_exchange_u32(&pstate->state, &state, BM_INPROGRESS);
 
 		/* Exit if bitmap is done, or if we're the leader. */
 		if (state != BM_INPROGRESS)
@@ -538,9 +531,7 @@ ExecBitmapHeapInitializeDSM(BitmapHeapScanState *node,
 
 	pstate->tbmiterator = 0;
 
-	/* Initialize the mutex */
-	SpinLockInit(&pstate->mutex);
-	pstate->state = BM_INITIAL;
+	pg_atomic_init_u32(&pstate->state, BM_INITIAL);
 
 	ConditionVariableInit(&pstate->cv);
 
@@ -565,7 +556,7 @@ ExecBitmapHeapReInitializeDSM(BitmapHeapScanState *node,
 	if (dsa == NULL)
 		return;
 
-	pstate->state = BM_INITIAL;
+	pg_atomic_write_u32(&pstate->state, BM_INITIAL);
 
 	if (DsaPointerIsValid(pstate->tbmiterator))
 		tbm_free_shared_area(dsa, pstate->tbmiterator);
-- 
2.50.1 (Apple Git-155)


--Xf36GNcW+0xZNily
Content-Type: text/plain; charset=us-ascii
Content-Disposition: attachment;
	filename=v2-0003-convert-FixedParallelState-last_xlog_end-to-an-at.patch



^ permalink  raw  reply  [nested|flat] 440+ messages in thread

* [PATCH v1 2/8] convert ParallelBitmapHeapState->state to an atomic
@ 2026-07-09 18:38 Nathan Bossart <nathan@postgresql.org>
  0 siblings, 0 replies; 440+ messages in thread

From: Nathan Bossart @ 2026-07-09 18:38 UTC (permalink / raw)

---
 src/backend/executor/nodeBitmapHeapscan.c | 21 ++++++---------------
 1 file changed, 6 insertions(+), 15 deletions(-)

diff --git a/src/backend/executor/nodeBitmapHeapscan.c b/src/backend/executor/nodeBitmapHeapscan.c
index 83d6478bc2b..f2bb487bf10 100644
--- a/src/backend/executor/nodeBitmapHeapscan.c
+++ b/src/backend/executor/nodeBitmapHeapscan.c
@@ -79,7 +79,6 @@ typedef enum
 /* ----------------
  *	 ParallelBitmapHeapState information
  *		tbmiterator				iterator for scanning current pages
- *		mutex					mutual exclusion for state
  *		state					current state of the TIDBitmap
  *		cv						conditional wait variable
  * ----------------
@@ -87,8 +86,7 @@ typedef enum
 typedef struct ParallelBitmapHeapState
 {
 	dsa_pointer tbmiterator;
-	slock_t		mutex;
-	SharedBitmapState state;
+	pg_atomic_uint32 state;
 	ConditionVariable cv;
 } ParallelBitmapHeapState;
 
@@ -228,9 +226,7 @@ BitmapHeapNext(BitmapHeapScanState *node)
 static inline void
 BitmapDoneInitializingSharedState(ParallelBitmapHeapState *pstate)
 {
-	SpinLockAcquire(&pstate->mutex);
-	pstate->state = BM_FINISHED;
-	SpinLockRelease(&pstate->mutex);
+	pg_atomic_write_membarrier_u32(&pstate->state, BM_FINISHED);
 	ConditionVariableBroadcast(&pstate->cv);
 }
 
@@ -480,11 +476,8 @@ BitmapShouldInitializeSharedState(ParallelBitmapHeapState *pstate)
 
 	while (1)
 	{
-		SpinLockAcquire(&pstate->mutex);
-		state = pstate->state;
-		if (pstate->state == BM_INITIAL)
-			pstate->state = BM_INPROGRESS;
-		SpinLockRelease(&pstate->mutex);
+		state = BM_INITIAL;
+		pg_atomic_compare_exchange_u32(&pstate->state, &state, BM_INPROGRESS);
 
 		/* Exit if bitmap is done, or if we're the leader. */
 		if (state != BM_INPROGRESS)
@@ -538,9 +531,7 @@ ExecBitmapHeapInitializeDSM(BitmapHeapScanState *node,
 
 	pstate->tbmiterator = 0;
 
-	/* Initialize the mutex */
-	SpinLockInit(&pstate->mutex);
-	pstate->state = BM_INITIAL;
+	pg_atomic_init_u32(&pstate->state, BM_INITIAL);
 
 	ConditionVariableInit(&pstate->cv);
 
@@ -565,7 +556,7 @@ ExecBitmapHeapReInitializeDSM(BitmapHeapScanState *node,
 	if (dsa == NULL)
 		return;
 
-	pstate->state = BM_INITIAL;
+	pg_atomic_write_u32(&pstate->state, BM_INITIAL);
 
 	if (DsaPointerIsValid(pstate->tbmiterator))
 		tbm_free_shared_area(dsa, pstate->tbmiterator);
-- 
2.50.1 (Apple Git-155)


--Ot5x3ffkWEuxilWO
Content-Type: text/plain; charset=us-ascii
Content-Disposition: attachment;
	filename=v1-0003-convert-FixedParallelState-last_xlog_end-to-an-at.patch



^ permalink  raw  reply  [nested|flat] 440+ messages in thread

* [PATCH v1 2/8] convert ParallelBitmapHeapState->state to an atomic
@ 2026-07-09 18:38 Nathan Bossart <nathan@postgresql.org>
  0 siblings, 0 replies; 440+ messages in thread

From: Nathan Bossart @ 2026-07-09 18:38 UTC (permalink / raw)

---
 src/backend/executor/nodeBitmapHeapscan.c | 21 ++++++---------------
 1 file changed, 6 insertions(+), 15 deletions(-)

diff --git a/src/backend/executor/nodeBitmapHeapscan.c b/src/backend/executor/nodeBitmapHeapscan.c
index 83d6478bc2b..f2bb487bf10 100644
--- a/src/backend/executor/nodeBitmapHeapscan.c
+++ b/src/backend/executor/nodeBitmapHeapscan.c
@@ -79,7 +79,6 @@ typedef enum
 /* ----------------
  *	 ParallelBitmapHeapState information
  *		tbmiterator				iterator for scanning current pages
- *		mutex					mutual exclusion for state
  *		state					current state of the TIDBitmap
  *		cv						conditional wait variable
  * ----------------
@@ -87,8 +86,7 @@ typedef enum
 typedef struct ParallelBitmapHeapState
 {
 	dsa_pointer tbmiterator;
-	slock_t		mutex;
-	SharedBitmapState state;
+	pg_atomic_uint32 state;
 	ConditionVariable cv;
 } ParallelBitmapHeapState;
 
@@ -228,9 +226,7 @@ BitmapHeapNext(BitmapHeapScanState *node)
 static inline void
 BitmapDoneInitializingSharedState(ParallelBitmapHeapState *pstate)
 {
-	SpinLockAcquire(&pstate->mutex);
-	pstate->state = BM_FINISHED;
-	SpinLockRelease(&pstate->mutex);
+	pg_atomic_write_membarrier_u32(&pstate->state, BM_FINISHED);
 	ConditionVariableBroadcast(&pstate->cv);
 }
 
@@ -480,11 +476,8 @@ BitmapShouldInitializeSharedState(ParallelBitmapHeapState *pstate)
 
 	while (1)
 	{
-		SpinLockAcquire(&pstate->mutex);
-		state = pstate->state;
-		if (pstate->state == BM_INITIAL)
-			pstate->state = BM_INPROGRESS;
-		SpinLockRelease(&pstate->mutex);
+		state = BM_INITIAL;
+		pg_atomic_compare_exchange_u32(&pstate->state, &state, BM_INPROGRESS);
 
 		/* Exit if bitmap is done, or if we're the leader. */
 		if (state != BM_INPROGRESS)
@@ -538,9 +531,7 @@ ExecBitmapHeapInitializeDSM(BitmapHeapScanState *node,
 
 	pstate->tbmiterator = 0;
 
-	/* Initialize the mutex */
-	SpinLockInit(&pstate->mutex);
-	pstate->state = BM_INITIAL;
+	pg_atomic_init_u32(&pstate->state, BM_INITIAL);
 
 	ConditionVariableInit(&pstate->cv);
 
@@ -565,7 +556,7 @@ ExecBitmapHeapReInitializeDSM(BitmapHeapScanState *node,
 	if (dsa == NULL)
 		return;
 
-	pstate->state = BM_INITIAL;
+	pg_atomic_write_u32(&pstate->state, BM_INITIAL);
 
 	if (DsaPointerIsValid(pstate->tbmiterator))
 		tbm_free_shared_area(dsa, pstate->tbmiterator);
-- 
2.50.1 (Apple Git-155)


--Ot5x3ffkWEuxilWO
Content-Type: text/plain; charset=us-ascii
Content-Disposition: attachment;
	filename=v1-0003-convert-FixedParallelState-last_xlog_end-to-an-at.patch



^ permalink  raw  reply  [nested|flat] 440+ messages in thread

* [PATCH v1 2/8] convert ParallelBitmapHeapState->state to an atomic
@ 2026-07-09 18:38 Nathan Bossart <nathan@postgresql.org>
  0 siblings, 0 replies; 440+ messages in thread

From: Nathan Bossart @ 2026-07-09 18:38 UTC (permalink / raw)

---
 src/backend/executor/nodeBitmapHeapscan.c | 21 ++++++---------------
 1 file changed, 6 insertions(+), 15 deletions(-)

diff --git a/src/backend/executor/nodeBitmapHeapscan.c b/src/backend/executor/nodeBitmapHeapscan.c
index 83d6478bc2b..f2bb487bf10 100644
--- a/src/backend/executor/nodeBitmapHeapscan.c
+++ b/src/backend/executor/nodeBitmapHeapscan.c
@@ -79,7 +79,6 @@ typedef enum
 /* ----------------
  *	 ParallelBitmapHeapState information
  *		tbmiterator				iterator for scanning current pages
- *		mutex					mutual exclusion for state
  *		state					current state of the TIDBitmap
  *		cv						conditional wait variable
  * ----------------
@@ -87,8 +86,7 @@ typedef enum
 typedef struct ParallelBitmapHeapState
 {
 	dsa_pointer tbmiterator;
-	slock_t		mutex;
-	SharedBitmapState state;
+	pg_atomic_uint32 state;
 	ConditionVariable cv;
 } ParallelBitmapHeapState;
 
@@ -228,9 +226,7 @@ BitmapHeapNext(BitmapHeapScanState *node)
 static inline void
 BitmapDoneInitializingSharedState(ParallelBitmapHeapState *pstate)
 {
-	SpinLockAcquire(&pstate->mutex);
-	pstate->state = BM_FINISHED;
-	SpinLockRelease(&pstate->mutex);
+	pg_atomic_write_membarrier_u32(&pstate->state, BM_FINISHED);
 	ConditionVariableBroadcast(&pstate->cv);
 }
 
@@ -480,11 +476,8 @@ BitmapShouldInitializeSharedState(ParallelBitmapHeapState *pstate)
 
 	while (1)
 	{
-		SpinLockAcquire(&pstate->mutex);
-		state = pstate->state;
-		if (pstate->state == BM_INITIAL)
-			pstate->state = BM_INPROGRESS;
-		SpinLockRelease(&pstate->mutex);
+		state = BM_INITIAL;
+		pg_atomic_compare_exchange_u32(&pstate->state, &state, BM_INPROGRESS);
 
 		/* Exit if bitmap is done, or if we're the leader. */
 		if (state != BM_INPROGRESS)
@@ -538,9 +531,7 @@ ExecBitmapHeapInitializeDSM(BitmapHeapScanState *node,
 
 	pstate->tbmiterator = 0;
 
-	/* Initialize the mutex */
-	SpinLockInit(&pstate->mutex);
-	pstate->state = BM_INITIAL;
+	pg_atomic_init_u32(&pstate->state, BM_INITIAL);
 
 	ConditionVariableInit(&pstate->cv);
 
@@ -565,7 +556,7 @@ ExecBitmapHeapReInitializeDSM(BitmapHeapScanState *node,
 	if (dsa == NULL)
 		return;
 
-	pstate->state = BM_INITIAL;
+	pg_atomic_write_u32(&pstate->state, BM_INITIAL);
 
 	if (DsaPointerIsValid(pstate->tbmiterator))
 		tbm_free_shared_area(dsa, pstate->tbmiterator);
-- 
2.50.1 (Apple Git-155)


--Ot5x3ffkWEuxilWO
Content-Type: text/plain; charset=us-ascii
Content-Disposition: attachment;
	filename=v1-0003-convert-FixedParallelState-last_xlog_end-to-an-at.patch



^ permalink  raw  reply  [nested|flat] 440+ messages in thread

* [PATCH v1 2/8] convert ParallelBitmapHeapState->state to an atomic
@ 2026-07-09 18:38 Nathan Bossart <nathan@postgresql.org>
  0 siblings, 0 replies; 440+ messages in thread

From: Nathan Bossart @ 2026-07-09 18:38 UTC (permalink / raw)

---
 src/backend/executor/nodeBitmapHeapscan.c | 21 ++++++---------------
 1 file changed, 6 insertions(+), 15 deletions(-)

diff --git a/src/backend/executor/nodeBitmapHeapscan.c b/src/backend/executor/nodeBitmapHeapscan.c
index 83d6478bc2b..f2bb487bf10 100644
--- a/src/backend/executor/nodeBitmapHeapscan.c
+++ b/src/backend/executor/nodeBitmapHeapscan.c
@@ -79,7 +79,6 @@ typedef enum
 /* ----------------
  *	 ParallelBitmapHeapState information
  *		tbmiterator				iterator for scanning current pages
- *		mutex					mutual exclusion for state
  *		state					current state of the TIDBitmap
  *		cv						conditional wait variable
  * ----------------
@@ -87,8 +86,7 @@ typedef enum
 typedef struct ParallelBitmapHeapState
 {
 	dsa_pointer tbmiterator;
-	slock_t		mutex;
-	SharedBitmapState state;
+	pg_atomic_uint32 state;
 	ConditionVariable cv;
 } ParallelBitmapHeapState;
 
@@ -228,9 +226,7 @@ BitmapHeapNext(BitmapHeapScanState *node)
 static inline void
 BitmapDoneInitializingSharedState(ParallelBitmapHeapState *pstate)
 {
-	SpinLockAcquire(&pstate->mutex);
-	pstate->state = BM_FINISHED;
-	SpinLockRelease(&pstate->mutex);
+	pg_atomic_write_membarrier_u32(&pstate->state, BM_FINISHED);
 	ConditionVariableBroadcast(&pstate->cv);
 }
 
@@ -480,11 +476,8 @@ BitmapShouldInitializeSharedState(ParallelBitmapHeapState *pstate)
 
 	while (1)
 	{
-		SpinLockAcquire(&pstate->mutex);
-		state = pstate->state;
-		if (pstate->state == BM_INITIAL)
-			pstate->state = BM_INPROGRESS;
-		SpinLockRelease(&pstate->mutex);
+		state = BM_INITIAL;
+		pg_atomic_compare_exchange_u32(&pstate->state, &state, BM_INPROGRESS);
 
 		/* Exit if bitmap is done, or if we're the leader. */
 		if (state != BM_INPROGRESS)
@@ -538,9 +531,7 @@ ExecBitmapHeapInitializeDSM(BitmapHeapScanState *node,
 
 	pstate->tbmiterator = 0;
 
-	/* Initialize the mutex */
-	SpinLockInit(&pstate->mutex);
-	pstate->state = BM_INITIAL;
+	pg_atomic_init_u32(&pstate->state, BM_INITIAL);
 
 	ConditionVariableInit(&pstate->cv);
 
@@ -565,7 +556,7 @@ ExecBitmapHeapReInitializeDSM(BitmapHeapScanState *node,
 	if (dsa == NULL)
 		return;
 
-	pstate->state = BM_INITIAL;
+	pg_atomic_write_u32(&pstate->state, BM_INITIAL);
 
 	if (DsaPointerIsValid(pstate->tbmiterator))
 		tbm_free_shared_area(dsa, pstate->tbmiterator);
-- 
2.50.1 (Apple Git-155)


--Ot5x3ffkWEuxilWO
Content-Type: text/plain; charset=us-ascii
Content-Disposition: attachment;
	filename=v1-0003-convert-FixedParallelState-last_xlog_end-to-an-at.patch



^ permalink  raw  reply  [nested|flat] 440+ messages in thread

* [PATCH v1 2/8] convert ParallelBitmapHeapState->state to an atomic
@ 2026-07-09 18:38 Nathan Bossart <nathan@postgresql.org>
  0 siblings, 0 replies; 440+ messages in thread

From: Nathan Bossart @ 2026-07-09 18:38 UTC (permalink / raw)

---
 src/backend/executor/nodeBitmapHeapscan.c | 21 ++++++---------------
 1 file changed, 6 insertions(+), 15 deletions(-)

diff --git a/src/backend/executor/nodeBitmapHeapscan.c b/src/backend/executor/nodeBitmapHeapscan.c
index 83d6478bc2b..f2bb487bf10 100644
--- a/src/backend/executor/nodeBitmapHeapscan.c
+++ b/src/backend/executor/nodeBitmapHeapscan.c
@@ -79,7 +79,6 @@ typedef enum
 /* ----------------
  *	 ParallelBitmapHeapState information
  *		tbmiterator				iterator for scanning current pages
- *		mutex					mutual exclusion for state
  *		state					current state of the TIDBitmap
  *		cv						conditional wait variable
  * ----------------
@@ -87,8 +86,7 @@ typedef enum
 typedef struct ParallelBitmapHeapState
 {
 	dsa_pointer tbmiterator;
-	slock_t		mutex;
-	SharedBitmapState state;
+	pg_atomic_uint32 state;
 	ConditionVariable cv;
 } ParallelBitmapHeapState;
 
@@ -228,9 +226,7 @@ BitmapHeapNext(BitmapHeapScanState *node)
 static inline void
 BitmapDoneInitializingSharedState(ParallelBitmapHeapState *pstate)
 {
-	SpinLockAcquire(&pstate->mutex);
-	pstate->state = BM_FINISHED;
-	SpinLockRelease(&pstate->mutex);
+	pg_atomic_write_membarrier_u32(&pstate->state, BM_FINISHED);
 	ConditionVariableBroadcast(&pstate->cv);
 }
 
@@ -480,11 +476,8 @@ BitmapShouldInitializeSharedState(ParallelBitmapHeapState *pstate)
 
 	while (1)
 	{
-		SpinLockAcquire(&pstate->mutex);
-		state = pstate->state;
-		if (pstate->state == BM_INITIAL)
-			pstate->state = BM_INPROGRESS;
-		SpinLockRelease(&pstate->mutex);
+		state = BM_INITIAL;
+		pg_atomic_compare_exchange_u32(&pstate->state, &state, BM_INPROGRESS);
 
 		/* Exit if bitmap is done, or if we're the leader. */
 		if (state != BM_INPROGRESS)
@@ -538,9 +531,7 @@ ExecBitmapHeapInitializeDSM(BitmapHeapScanState *node,
 
 	pstate->tbmiterator = 0;
 
-	/* Initialize the mutex */
-	SpinLockInit(&pstate->mutex);
-	pstate->state = BM_INITIAL;
+	pg_atomic_init_u32(&pstate->state, BM_INITIAL);
 
 	ConditionVariableInit(&pstate->cv);
 
@@ -565,7 +556,7 @@ ExecBitmapHeapReInitializeDSM(BitmapHeapScanState *node,
 	if (dsa == NULL)
 		return;
 
-	pstate->state = BM_INITIAL;
+	pg_atomic_write_u32(&pstate->state, BM_INITIAL);
 
 	if (DsaPointerIsValid(pstate->tbmiterator))
 		tbm_free_shared_area(dsa, pstate->tbmiterator);
-- 
2.50.1 (Apple Git-155)


--Ot5x3ffkWEuxilWO
Content-Type: text/plain; charset=us-ascii
Content-Disposition: attachment;
	filename=v1-0003-convert-FixedParallelState-last_xlog_end-to-an-at.patch



^ permalink  raw  reply  [nested|flat] 440+ messages in thread

* [PATCH v1 2/8] convert ParallelBitmapHeapState->state to an atomic
@ 2026-07-09 18:38 Nathan Bossart <nathan@postgresql.org>
  0 siblings, 0 replies; 440+ messages in thread

From: Nathan Bossart @ 2026-07-09 18:38 UTC (permalink / raw)

---
 src/backend/executor/nodeBitmapHeapscan.c | 21 ++++++---------------
 1 file changed, 6 insertions(+), 15 deletions(-)

diff --git a/src/backend/executor/nodeBitmapHeapscan.c b/src/backend/executor/nodeBitmapHeapscan.c
index 83d6478bc2b..f2bb487bf10 100644
--- a/src/backend/executor/nodeBitmapHeapscan.c
+++ b/src/backend/executor/nodeBitmapHeapscan.c
@@ -79,7 +79,6 @@ typedef enum
 /* ----------------
  *	 ParallelBitmapHeapState information
  *		tbmiterator				iterator for scanning current pages
- *		mutex					mutual exclusion for state
  *		state					current state of the TIDBitmap
  *		cv						conditional wait variable
  * ----------------
@@ -87,8 +86,7 @@ typedef enum
 typedef struct ParallelBitmapHeapState
 {
 	dsa_pointer tbmiterator;
-	slock_t		mutex;
-	SharedBitmapState state;
+	pg_atomic_uint32 state;
 	ConditionVariable cv;
 } ParallelBitmapHeapState;
 
@@ -228,9 +226,7 @@ BitmapHeapNext(BitmapHeapScanState *node)
 static inline void
 BitmapDoneInitializingSharedState(ParallelBitmapHeapState *pstate)
 {
-	SpinLockAcquire(&pstate->mutex);
-	pstate->state = BM_FINISHED;
-	SpinLockRelease(&pstate->mutex);
+	pg_atomic_write_membarrier_u32(&pstate->state, BM_FINISHED);
 	ConditionVariableBroadcast(&pstate->cv);
 }
 
@@ -480,11 +476,8 @@ BitmapShouldInitializeSharedState(ParallelBitmapHeapState *pstate)
 
 	while (1)
 	{
-		SpinLockAcquire(&pstate->mutex);
-		state = pstate->state;
-		if (pstate->state == BM_INITIAL)
-			pstate->state = BM_INPROGRESS;
-		SpinLockRelease(&pstate->mutex);
+		state = BM_INITIAL;
+		pg_atomic_compare_exchange_u32(&pstate->state, &state, BM_INPROGRESS);
 
 		/* Exit if bitmap is done, or if we're the leader. */
 		if (state != BM_INPROGRESS)
@@ -538,9 +531,7 @@ ExecBitmapHeapInitializeDSM(BitmapHeapScanState *node,
 
 	pstate->tbmiterator = 0;
 
-	/* Initialize the mutex */
-	SpinLockInit(&pstate->mutex);
-	pstate->state = BM_INITIAL;
+	pg_atomic_init_u32(&pstate->state, BM_INITIAL);
 
 	ConditionVariableInit(&pstate->cv);
 
@@ -565,7 +556,7 @@ ExecBitmapHeapReInitializeDSM(BitmapHeapScanState *node,
 	if (dsa == NULL)
 		return;
 
-	pstate->state = BM_INITIAL;
+	pg_atomic_write_u32(&pstate->state, BM_INITIAL);
 
 	if (DsaPointerIsValid(pstate->tbmiterator))
 		tbm_free_shared_area(dsa, pstate->tbmiterator);
-- 
2.50.1 (Apple Git-155)


--Ot5x3ffkWEuxilWO
Content-Type: text/plain; charset=us-ascii
Content-Disposition: attachment;
	filename=v1-0003-convert-FixedParallelState-last_xlog_end-to-an-at.patch



^ permalink  raw  reply  [nested|flat] 440+ messages in thread

* [PATCH v1 2/8] convert ParallelBitmapHeapState->state to an atomic
@ 2026-07-09 18:38 Nathan Bossart <nathan@postgresql.org>
  0 siblings, 0 replies; 440+ messages in thread

From: Nathan Bossart @ 2026-07-09 18:38 UTC (permalink / raw)

---
 src/backend/executor/nodeBitmapHeapscan.c | 21 ++++++---------------
 1 file changed, 6 insertions(+), 15 deletions(-)

diff --git a/src/backend/executor/nodeBitmapHeapscan.c b/src/backend/executor/nodeBitmapHeapscan.c
index 83d6478bc2b..f2bb487bf10 100644
--- a/src/backend/executor/nodeBitmapHeapscan.c
+++ b/src/backend/executor/nodeBitmapHeapscan.c
@@ -79,7 +79,6 @@ typedef enum
 /* ----------------
  *	 ParallelBitmapHeapState information
  *		tbmiterator				iterator for scanning current pages
- *		mutex					mutual exclusion for state
  *		state					current state of the TIDBitmap
  *		cv						conditional wait variable
  * ----------------
@@ -87,8 +86,7 @@ typedef enum
 typedef struct ParallelBitmapHeapState
 {
 	dsa_pointer tbmiterator;
-	slock_t		mutex;
-	SharedBitmapState state;
+	pg_atomic_uint32 state;
 	ConditionVariable cv;
 } ParallelBitmapHeapState;
 
@@ -228,9 +226,7 @@ BitmapHeapNext(BitmapHeapScanState *node)
 static inline void
 BitmapDoneInitializingSharedState(ParallelBitmapHeapState *pstate)
 {
-	SpinLockAcquire(&pstate->mutex);
-	pstate->state = BM_FINISHED;
-	SpinLockRelease(&pstate->mutex);
+	pg_atomic_write_membarrier_u32(&pstate->state, BM_FINISHED);
 	ConditionVariableBroadcast(&pstate->cv);
 }
 
@@ -480,11 +476,8 @@ BitmapShouldInitializeSharedState(ParallelBitmapHeapState *pstate)
 
 	while (1)
 	{
-		SpinLockAcquire(&pstate->mutex);
-		state = pstate->state;
-		if (pstate->state == BM_INITIAL)
-			pstate->state = BM_INPROGRESS;
-		SpinLockRelease(&pstate->mutex);
+		state = BM_INITIAL;
+		pg_atomic_compare_exchange_u32(&pstate->state, &state, BM_INPROGRESS);
 
 		/* Exit if bitmap is done, or if we're the leader. */
 		if (state != BM_INPROGRESS)
@@ -538,9 +531,7 @@ ExecBitmapHeapInitializeDSM(BitmapHeapScanState *node,
 
 	pstate->tbmiterator = 0;
 
-	/* Initialize the mutex */
-	SpinLockInit(&pstate->mutex);
-	pstate->state = BM_INITIAL;
+	pg_atomic_init_u32(&pstate->state, BM_INITIAL);
 
 	ConditionVariableInit(&pstate->cv);
 
@@ -565,7 +556,7 @@ ExecBitmapHeapReInitializeDSM(BitmapHeapScanState *node,
 	if (dsa == NULL)
 		return;
 
-	pstate->state = BM_INITIAL;
+	pg_atomic_write_u32(&pstate->state, BM_INITIAL);
 
 	if (DsaPointerIsValid(pstate->tbmiterator))
 		tbm_free_shared_area(dsa, pstate->tbmiterator);
-- 
2.50.1 (Apple Git-155)


--Ot5x3ffkWEuxilWO
Content-Type: text/plain; charset=us-ascii
Content-Disposition: attachment;
	filename=v1-0003-convert-FixedParallelState-last_xlog_end-to-an-at.patch



^ permalink  raw  reply  [nested|flat] 440+ messages in thread

* [PATCH v1 2/8] convert ParallelBitmapHeapState->state to an atomic
@ 2026-07-09 18:38 Nathan Bossart <nathan@postgresql.org>
  0 siblings, 0 replies; 440+ messages in thread

From: Nathan Bossart @ 2026-07-09 18:38 UTC (permalink / raw)

---
 src/backend/executor/nodeBitmapHeapscan.c | 21 ++++++---------------
 1 file changed, 6 insertions(+), 15 deletions(-)

diff --git a/src/backend/executor/nodeBitmapHeapscan.c b/src/backend/executor/nodeBitmapHeapscan.c
index 83d6478bc2b..f2bb487bf10 100644
--- a/src/backend/executor/nodeBitmapHeapscan.c
+++ b/src/backend/executor/nodeBitmapHeapscan.c
@@ -79,7 +79,6 @@ typedef enum
 /* ----------------
  *	 ParallelBitmapHeapState information
  *		tbmiterator				iterator for scanning current pages
- *		mutex					mutual exclusion for state
  *		state					current state of the TIDBitmap
  *		cv						conditional wait variable
  * ----------------
@@ -87,8 +86,7 @@ typedef enum
 typedef struct ParallelBitmapHeapState
 {
 	dsa_pointer tbmiterator;
-	slock_t		mutex;
-	SharedBitmapState state;
+	pg_atomic_uint32 state;
 	ConditionVariable cv;
 } ParallelBitmapHeapState;
 
@@ -228,9 +226,7 @@ BitmapHeapNext(BitmapHeapScanState *node)
 static inline void
 BitmapDoneInitializingSharedState(ParallelBitmapHeapState *pstate)
 {
-	SpinLockAcquire(&pstate->mutex);
-	pstate->state = BM_FINISHED;
-	SpinLockRelease(&pstate->mutex);
+	pg_atomic_write_membarrier_u32(&pstate->state, BM_FINISHED);
 	ConditionVariableBroadcast(&pstate->cv);
 }
 
@@ -480,11 +476,8 @@ BitmapShouldInitializeSharedState(ParallelBitmapHeapState *pstate)
 
 	while (1)
 	{
-		SpinLockAcquire(&pstate->mutex);
-		state = pstate->state;
-		if (pstate->state == BM_INITIAL)
-			pstate->state = BM_INPROGRESS;
-		SpinLockRelease(&pstate->mutex);
+		state = BM_INITIAL;
+		pg_atomic_compare_exchange_u32(&pstate->state, &state, BM_INPROGRESS);
 
 		/* Exit if bitmap is done, or if we're the leader. */
 		if (state != BM_INPROGRESS)
@@ -538,9 +531,7 @@ ExecBitmapHeapInitializeDSM(BitmapHeapScanState *node,
 
 	pstate->tbmiterator = 0;
 
-	/* Initialize the mutex */
-	SpinLockInit(&pstate->mutex);
-	pstate->state = BM_INITIAL;
+	pg_atomic_init_u32(&pstate->state, BM_INITIAL);
 
 	ConditionVariableInit(&pstate->cv);
 
@@ -565,7 +556,7 @@ ExecBitmapHeapReInitializeDSM(BitmapHeapScanState *node,
 	if (dsa == NULL)
 		return;
 
-	pstate->state = BM_INITIAL;
+	pg_atomic_write_u32(&pstate->state, BM_INITIAL);
 
 	if (DsaPointerIsValid(pstate->tbmiterator))
 		tbm_free_shared_area(dsa, pstate->tbmiterator);
-- 
2.50.1 (Apple Git-155)


--Ot5x3ffkWEuxilWO
Content-Type: text/plain; charset=us-ascii
Content-Disposition: attachment;
	filename=v1-0003-convert-FixedParallelState-last_xlog_end-to-an-at.patch



^ permalink  raw  reply  [nested|flat] 440+ messages in thread

* [PATCH v1 2/8] convert ParallelBitmapHeapState->state to an atomic
@ 2026-07-09 18:38 Nathan Bossart <nathan@postgresql.org>
  0 siblings, 0 replies; 440+ messages in thread

From: Nathan Bossart @ 2026-07-09 18:38 UTC (permalink / raw)

---
 src/backend/executor/nodeBitmapHeapscan.c | 21 ++++++---------------
 1 file changed, 6 insertions(+), 15 deletions(-)

diff --git a/src/backend/executor/nodeBitmapHeapscan.c b/src/backend/executor/nodeBitmapHeapscan.c
index 83d6478bc2b..f2bb487bf10 100644
--- a/src/backend/executor/nodeBitmapHeapscan.c
+++ b/src/backend/executor/nodeBitmapHeapscan.c
@@ -79,7 +79,6 @@ typedef enum
 /* ----------------
  *	 ParallelBitmapHeapState information
  *		tbmiterator				iterator for scanning current pages
- *		mutex					mutual exclusion for state
  *		state					current state of the TIDBitmap
  *		cv						conditional wait variable
  * ----------------
@@ -87,8 +86,7 @@ typedef enum
 typedef struct ParallelBitmapHeapState
 {
 	dsa_pointer tbmiterator;
-	slock_t		mutex;
-	SharedBitmapState state;
+	pg_atomic_uint32 state;
 	ConditionVariable cv;
 } ParallelBitmapHeapState;
 
@@ -228,9 +226,7 @@ BitmapHeapNext(BitmapHeapScanState *node)
 static inline void
 BitmapDoneInitializingSharedState(ParallelBitmapHeapState *pstate)
 {
-	SpinLockAcquire(&pstate->mutex);
-	pstate->state = BM_FINISHED;
-	SpinLockRelease(&pstate->mutex);
+	pg_atomic_write_membarrier_u32(&pstate->state, BM_FINISHED);
 	ConditionVariableBroadcast(&pstate->cv);
 }
 
@@ -480,11 +476,8 @@ BitmapShouldInitializeSharedState(ParallelBitmapHeapState *pstate)
 
 	while (1)
 	{
-		SpinLockAcquire(&pstate->mutex);
-		state = pstate->state;
-		if (pstate->state == BM_INITIAL)
-			pstate->state = BM_INPROGRESS;
-		SpinLockRelease(&pstate->mutex);
+		state = BM_INITIAL;
+		pg_atomic_compare_exchange_u32(&pstate->state, &state, BM_INPROGRESS);
 
 		/* Exit if bitmap is done, or if we're the leader. */
 		if (state != BM_INPROGRESS)
@@ -538,9 +531,7 @@ ExecBitmapHeapInitializeDSM(BitmapHeapScanState *node,
 
 	pstate->tbmiterator = 0;
 
-	/* Initialize the mutex */
-	SpinLockInit(&pstate->mutex);
-	pstate->state = BM_INITIAL;
+	pg_atomic_init_u32(&pstate->state, BM_INITIAL);
 
 	ConditionVariableInit(&pstate->cv);
 
@@ -565,7 +556,7 @@ ExecBitmapHeapReInitializeDSM(BitmapHeapScanState *node,
 	if (dsa == NULL)
 		return;
 
-	pstate->state = BM_INITIAL;
+	pg_atomic_write_u32(&pstate->state, BM_INITIAL);
 
 	if (DsaPointerIsValid(pstate->tbmiterator))
 		tbm_free_shared_area(dsa, pstate->tbmiterator);
-- 
2.50.1 (Apple Git-155)


--Ot5x3ffkWEuxilWO
Content-Type: text/plain; charset=us-ascii
Content-Disposition: attachment;
	filename=v1-0003-convert-FixedParallelState-last_xlog_end-to-an-at.patch



^ permalink  raw  reply  [nested|flat] 440+ messages in thread

* [PATCH v1 2/8] convert ParallelBitmapHeapState->state to an atomic
@ 2026-07-09 18:38 Nathan Bossart <nathan@postgresql.org>
  0 siblings, 0 replies; 440+ messages in thread

From: Nathan Bossart @ 2026-07-09 18:38 UTC (permalink / raw)

---
 src/backend/executor/nodeBitmapHeapscan.c | 21 ++++++---------------
 1 file changed, 6 insertions(+), 15 deletions(-)

diff --git a/src/backend/executor/nodeBitmapHeapscan.c b/src/backend/executor/nodeBitmapHeapscan.c
index 83d6478bc2b..f2bb487bf10 100644
--- a/src/backend/executor/nodeBitmapHeapscan.c
+++ b/src/backend/executor/nodeBitmapHeapscan.c
@@ -79,7 +79,6 @@ typedef enum
 /* ----------------
  *	 ParallelBitmapHeapState information
  *		tbmiterator				iterator for scanning current pages
- *		mutex					mutual exclusion for state
  *		state					current state of the TIDBitmap
  *		cv						conditional wait variable
  * ----------------
@@ -87,8 +86,7 @@ typedef enum
 typedef struct ParallelBitmapHeapState
 {
 	dsa_pointer tbmiterator;
-	slock_t		mutex;
-	SharedBitmapState state;
+	pg_atomic_uint32 state;
 	ConditionVariable cv;
 } ParallelBitmapHeapState;
 
@@ -228,9 +226,7 @@ BitmapHeapNext(BitmapHeapScanState *node)
 static inline void
 BitmapDoneInitializingSharedState(ParallelBitmapHeapState *pstate)
 {
-	SpinLockAcquire(&pstate->mutex);
-	pstate->state = BM_FINISHED;
-	SpinLockRelease(&pstate->mutex);
+	pg_atomic_write_membarrier_u32(&pstate->state, BM_FINISHED);
 	ConditionVariableBroadcast(&pstate->cv);
 }
 
@@ -480,11 +476,8 @@ BitmapShouldInitializeSharedState(ParallelBitmapHeapState *pstate)
 
 	while (1)
 	{
-		SpinLockAcquire(&pstate->mutex);
-		state = pstate->state;
-		if (pstate->state == BM_INITIAL)
-			pstate->state = BM_INPROGRESS;
-		SpinLockRelease(&pstate->mutex);
+		state = BM_INITIAL;
+		pg_atomic_compare_exchange_u32(&pstate->state, &state, BM_INPROGRESS);
 
 		/* Exit if bitmap is done, or if we're the leader. */
 		if (state != BM_INPROGRESS)
@@ -538,9 +531,7 @@ ExecBitmapHeapInitializeDSM(BitmapHeapScanState *node,
 
 	pstate->tbmiterator = 0;
 
-	/* Initialize the mutex */
-	SpinLockInit(&pstate->mutex);
-	pstate->state = BM_INITIAL;
+	pg_atomic_init_u32(&pstate->state, BM_INITIAL);
 
 	ConditionVariableInit(&pstate->cv);
 
@@ -565,7 +556,7 @@ ExecBitmapHeapReInitializeDSM(BitmapHeapScanState *node,
 	if (dsa == NULL)
 		return;
 
-	pstate->state = BM_INITIAL;
+	pg_atomic_write_u32(&pstate->state, BM_INITIAL);
 
 	if (DsaPointerIsValid(pstate->tbmiterator))
 		tbm_free_shared_area(dsa, pstate->tbmiterator);
-- 
2.50.1 (Apple Git-155)


--Ot5x3ffkWEuxilWO
Content-Type: text/plain; charset=us-ascii
Content-Disposition: attachment;
	filename=v1-0003-convert-FixedParallelState-last_xlog_end-to-an-at.patch



^ permalink  raw  reply  [nested|flat] 440+ messages in thread

* [PATCH v1 2/8] convert ParallelBitmapHeapState->state to an atomic
@ 2026-07-09 18:38 Nathan Bossart <nathan@postgresql.org>
  0 siblings, 0 replies; 440+ messages in thread

From: Nathan Bossart @ 2026-07-09 18:38 UTC (permalink / raw)

---
 src/backend/executor/nodeBitmapHeapscan.c | 21 ++++++---------------
 1 file changed, 6 insertions(+), 15 deletions(-)

diff --git a/src/backend/executor/nodeBitmapHeapscan.c b/src/backend/executor/nodeBitmapHeapscan.c
index 83d6478bc2b..f2bb487bf10 100644
--- a/src/backend/executor/nodeBitmapHeapscan.c
+++ b/src/backend/executor/nodeBitmapHeapscan.c
@@ -79,7 +79,6 @@ typedef enum
 /* ----------------
  *	 ParallelBitmapHeapState information
  *		tbmiterator				iterator for scanning current pages
- *		mutex					mutual exclusion for state
  *		state					current state of the TIDBitmap
  *		cv						conditional wait variable
  * ----------------
@@ -87,8 +86,7 @@ typedef enum
 typedef struct ParallelBitmapHeapState
 {
 	dsa_pointer tbmiterator;
-	slock_t		mutex;
-	SharedBitmapState state;
+	pg_atomic_uint32 state;
 	ConditionVariable cv;
 } ParallelBitmapHeapState;
 
@@ -228,9 +226,7 @@ BitmapHeapNext(BitmapHeapScanState *node)
 static inline void
 BitmapDoneInitializingSharedState(ParallelBitmapHeapState *pstate)
 {
-	SpinLockAcquire(&pstate->mutex);
-	pstate->state = BM_FINISHED;
-	SpinLockRelease(&pstate->mutex);
+	pg_atomic_write_membarrier_u32(&pstate->state, BM_FINISHED);
 	ConditionVariableBroadcast(&pstate->cv);
 }
 
@@ -480,11 +476,8 @@ BitmapShouldInitializeSharedState(ParallelBitmapHeapState *pstate)
 
 	while (1)
 	{
-		SpinLockAcquire(&pstate->mutex);
-		state = pstate->state;
-		if (pstate->state == BM_INITIAL)
-			pstate->state = BM_INPROGRESS;
-		SpinLockRelease(&pstate->mutex);
+		state = BM_INITIAL;
+		pg_atomic_compare_exchange_u32(&pstate->state, &state, BM_INPROGRESS);
 
 		/* Exit if bitmap is done, or if we're the leader. */
 		if (state != BM_INPROGRESS)
@@ -538,9 +531,7 @@ ExecBitmapHeapInitializeDSM(BitmapHeapScanState *node,
 
 	pstate->tbmiterator = 0;
 
-	/* Initialize the mutex */
-	SpinLockInit(&pstate->mutex);
-	pstate->state = BM_INITIAL;
+	pg_atomic_init_u32(&pstate->state, BM_INITIAL);
 
 	ConditionVariableInit(&pstate->cv);
 
@@ -565,7 +556,7 @@ ExecBitmapHeapReInitializeDSM(BitmapHeapScanState *node,
 	if (dsa == NULL)
 		return;
 
-	pstate->state = BM_INITIAL;
+	pg_atomic_write_u32(&pstate->state, BM_INITIAL);
 
 	if (DsaPointerIsValid(pstate->tbmiterator))
 		tbm_free_shared_area(dsa, pstate->tbmiterator);
-- 
2.50.1 (Apple Git-155)


--Ot5x3ffkWEuxilWO
Content-Type: text/plain; charset=us-ascii
Content-Disposition: attachment;
	filename=v1-0003-convert-FixedParallelState-last_xlog_end-to-an-at.patch



^ permalink  raw  reply  [nested|flat] 440+ messages in thread

* [PATCH v2 2/9] convert ParallelBitmapHeapState->state to an atomic
@ 2026-07-09 18:38 Nathan Bossart <nathan@postgresql.org>
  0 siblings, 0 replies; 440+ messages in thread

From: Nathan Bossart @ 2026-07-09 18:38 UTC (permalink / raw)

---
 src/backend/executor/nodeBitmapHeapscan.c | 23 +++++++----------------
 1 file changed, 7 insertions(+), 16 deletions(-)

diff --git a/src/backend/executor/nodeBitmapHeapscan.c b/src/backend/executor/nodeBitmapHeapscan.c
index 83d6478bc2b..a9e83f30687 100644
--- a/src/backend/executor/nodeBitmapHeapscan.c
+++ b/src/backend/executor/nodeBitmapHeapscan.c
@@ -79,7 +79,6 @@ typedef enum
 /* ----------------
  *	 ParallelBitmapHeapState information
  *		tbmiterator				iterator for scanning current pages
- *		mutex					mutual exclusion for state
  *		state					current state of the TIDBitmap
  *		cv						conditional wait variable
  * ----------------
@@ -87,8 +86,7 @@ typedef enum
 typedef struct ParallelBitmapHeapState
 {
 	dsa_pointer tbmiterator;
-	slock_t		mutex;
-	SharedBitmapState state;
+	pg_atomic_uint32 state;
 	ConditionVariable cv;
 } ParallelBitmapHeapState;
 
@@ -228,9 +226,7 @@ BitmapHeapNext(BitmapHeapScanState *node)
 static inline void
 BitmapDoneInitializingSharedState(ParallelBitmapHeapState *pstate)
 {
-	SpinLockAcquire(&pstate->mutex);
-	pstate->state = BM_FINISHED;
-	SpinLockRelease(&pstate->mutex);
+	pg_atomic_write_membarrier_u32(&pstate->state, BM_FINISHED);
 	ConditionVariableBroadcast(&pstate->cv);
 }
 
@@ -476,15 +472,12 @@ ExecInitBitmapHeapScan(BitmapHeapScan *node, EState *estate, int eflags)
 static bool
 BitmapShouldInitializeSharedState(ParallelBitmapHeapState *pstate)
 {
-	SharedBitmapState state;
+	uint32		state;
 
 	while (1)
 	{
-		SpinLockAcquire(&pstate->mutex);
-		state = pstate->state;
-		if (pstate->state == BM_INITIAL)
-			pstate->state = BM_INPROGRESS;
-		SpinLockRelease(&pstate->mutex);
+		state = BM_INITIAL;
+		pg_atomic_compare_exchange_u32(&pstate->state, &state, BM_INPROGRESS);
 
 		/* Exit if bitmap is done, or if we're the leader. */
 		if (state != BM_INPROGRESS)
@@ -538,9 +531,7 @@ ExecBitmapHeapInitializeDSM(BitmapHeapScanState *node,
 
 	pstate->tbmiterator = 0;
 
-	/* Initialize the mutex */
-	SpinLockInit(&pstate->mutex);
-	pstate->state = BM_INITIAL;
+	pg_atomic_init_u32(&pstate->state, BM_INITIAL);
 
 	ConditionVariableInit(&pstate->cv);
 
@@ -565,7 +556,7 @@ ExecBitmapHeapReInitializeDSM(BitmapHeapScanState *node,
 	if (dsa == NULL)
 		return;
 
-	pstate->state = BM_INITIAL;
+	pg_atomic_write_u32(&pstate->state, BM_INITIAL);
 
 	if (DsaPointerIsValid(pstate->tbmiterator))
 		tbm_free_shared_area(dsa, pstate->tbmiterator);
-- 
2.50.1 (Apple Git-155)


--Xf36GNcW+0xZNily
Content-Type: text/plain; charset=us-ascii
Content-Disposition: attachment;
	filename=v2-0003-convert-FixedParallelState-last_xlog_end-to-an-at.patch



^ permalink  raw  reply  [nested|flat] 440+ messages in thread

* [PATCH v1 2/8] convert ParallelBitmapHeapState->state to an atomic
@ 2026-07-09 18:38 Nathan Bossart <nathan@postgresql.org>
  0 siblings, 0 replies; 440+ messages in thread

From: Nathan Bossart @ 2026-07-09 18:38 UTC (permalink / raw)

---
 src/backend/executor/nodeBitmapHeapscan.c | 21 ++++++---------------
 1 file changed, 6 insertions(+), 15 deletions(-)

diff --git a/src/backend/executor/nodeBitmapHeapscan.c b/src/backend/executor/nodeBitmapHeapscan.c
index 83d6478bc2b..f2bb487bf10 100644
--- a/src/backend/executor/nodeBitmapHeapscan.c
+++ b/src/backend/executor/nodeBitmapHeapscan.c
@@ -79,7 +79,6 @@ typedef enum
 /* ----------------
  *	 ParallelBitmapHeapState information
  *		tbmiterator				iterator for scanning current pages
- *		mutex					mutual exclusion for state
  *		state					current state of the TIDBitmap
  *		cv						conditional wait variable
  * ----------------
@@ -87,8 +86,7 @@ typedef enum
 typedef struct ParallelBitmapHeapState
 {
 	dsa_pointer tbmiterator;
-	slock_t		mutex;
-	SharedBitmapState state;
+	pg_atomic_uint32 state;
 	ConditionVariable cv;
 } ParallelBitmapHeapState;
 
@@ -228,9 +226,7 @@ BitmapHeapNext(BitmapHeapScanState *node)
 static inline void
 BitmapDoneInitializingSharedState(ParallelBitmapHeapState *pstate)
 {
-	SpinLockAcquire(&pstate->mutex);
-	pstate->state = BM_FINISHED;
-	SpinLockRelease(&pstate->mutex);
+	pg_atomic_write_membarrier_u32(&pstate->state, BM_FINISHED);
 	ConditionVariableBroadcast(&pstate->cv);
 }
 
@@ -480,11 +476,8 @@ BitmapShouldInitializeSharedState(ParallelBitmapHeapState *pstate)
 
 	while (1)
 	{
-		SpinLockAcquire(&pstate->mutex);
-		state = pstate->state;
-		if (pstate->state == BM_INITIAL)
-			pstate->state = BM_INPROGRESS;
-		SpinLockRelease(&pstate->mutex);
+		state = BM_INITIAL;
+		pg_atomic_compare_exchange_u32(&pstate->state, &state, BM_INPROGRESS);
 
 		/* Exit if bitmap is done, or if we're the leader. */
 		if (state != BM_INPROGRESS)
@@ -538,9 +531,7 @@ ExecBitmapHeapInitializeDSM(BitmapHeapScanState *node,
 
 	pstate->tbmiterator = 0;
 
-	/* Initialize the mutex */
-	SpinLockInit(&pstate->mutex);
-	pstate->state = BM_INITIAL;
+	pg_atomic_init_u32(&pstate->state, BM_INITIAL);
 
 	ConditionVariableInit(&pstate->cv);
 
@@ -565,7 +556,7 @@ ExecBitmapHeapReInitializeDSM(BitmapHeapScanState *node,
 	if (dsa == NULL)
 		return;
 
-	pstate->state = BM_INITIAL;
+	pg_atomic_write_u32(&pstate->state, BM_INITIAL);
 
 	if (DsaPointerIsValid(pstate->tbmiterator))
 		tbm_free_shared_area(dsa, pstate->tbmiterator);
-- 
2.50.1 (Apple Git-155)


--Ot5x3ffkWEuxilWO
Content-Type: text/plain; charset=us-ascii
Content-Disposition: attachment;
	filename=v1-0003-convert-FixedParallelState-last_xlog_end-to-an-at.patch



^ permalink  raw  reply  [nested|flat] 440+ messages in thread

* [PATCH v2 2/9] convert ParallelBitmapHeapState->state to an atomic
@ 2026-07-09 18:38 Nathan Bossart <nathan@postgresql.org>
  0 siblings, 0 replies; 440+ messages in thread

From: Nathan Bossart @ 2026-07-09 18:38 UTC (permalink / raw)

---
 src/backend/executor/nodeBitmapHeapscan.c | 23 +++++++----------------
 1 file changed, 7 insertions(+), 16 deletions(-)

diff --git a/src/backend/executor/nodeBitmapHeapscan.c b/src/backend/executor/nodeBitmapHeapscan.c
index 83d6478bc2b..a9e83f30687 100644
--- a/src/backend/executor/nodeBitmapHeapscan.c
+++ b/src/backend/executor/nodeBitmapHeapscan.c
@@ -79,7 +79,6 @@ typedef enum
 /* ----------------
  *	 ParallelBitmapHeapState information
  *		tbmiterator				iterator for scanning current pages
- *		mutex					mutual exclusion for state
  *		state					current state of the TIDBitmap
  *		cv						conditional wait variable
  * ----------------
@@ -87,8 +86,7 @@ typedef enum
 typedef struct ParallelBitmapHeapState
 {
 	dsa_pointer tbmiterator;
-	slock_t		mutex;
-	SharedBitmapState state;
+	pg_atomic_uint32 state;
 	ConditionVariable cv;
 } ParallelBitmapHeapState;
 
@@ -228,9 +226,7 @@ BitmapHeapNext(BitmapHeapScanState *node)
 static inline void
 BitmapDoneInitializingSharedState(ParallelBitmapHeapState *pstate)
 {
-	SpinLockAcquire(&pstate->mutex);
-	pstate->state = BM_FINISHED;
-	SpinLockRelease(&pstate->mutex);
+	pg_atomic_write_membarrier_u32(&pstate->state, BM_FINISHED);
 	ConditionVariableBroadcast(&pstate->cv);
 }
 
@@ -476,15 +472,12 @@ ExecInitBitmapHeapScan(BitmapHeapScan *node, EState *estate, int eflags)
 static bool
 BitmapShouldInitializeSharedState(ParallelBitmapHeapState *pstate)
 {
-	SharedBitmapState state;
+	uint32		state;
 
 	while (1)
 	{
-		SpinLockAcquire(&pstate->mutex);
-		state = pstate->state;
-		if (pstate->state == BM_INITIAL)
-			pstate->state = BM_INPROGRESS;
-		SpinLockRelease(&pstate->mutex);
+		state = BM_INITIAL;
+		pg_atomic_compare_exchange_u32(&pstate->state, &state, BM_INPROGRESS);
 
 		/* Exit if bitmap is done, or if we're the leader. */
 		if (state != BM_INPROGRESS)
@@ -538,9 +531,7 @@ ExecBitmapHeapInitializeDSM(BitmapHeapScanState *node,
 
 	pstate->tbmiterator = 0;
 
-	/* Initialize the mutex */
-	SpinLockInit(&pstate->mutex);
-	pstate->state = BM_INITIAL;
+	pg_atomic_init_u32(&pstate->state, BM_INITIAL);
 
 	ConditionVariableInit(&pstate->cv);
 
@@ -565,7 +556,7 @@ ExecBitmapHeapReInitializeDSM(BitmapHeapScanState *node,
 	if (dsa == NULL)
 		return;
 
-	pstate->state = BM_INITIAL;
+	pg_atomic_write_u32(&pstate->state, BM_INITIAL);
 
 	if (DsaPointerIsValid(pstate->tbmiterator))
 		tbm_free_shared_area(dsa, pstate->tbmiterator);
-- 
2.50.1 (Apple Git-155)


--Xf36GNcW+0xZNily
Content-Type: text/plain; charset=us-ascii
Content-Disposition: attachment;
	filename=v2-0003-convert-FixedParallelState-last_xlog_end-to-an-at.patch



^ permalink  raw  reply  [nested|flat] 440+ messages in thread

* [PATCH v2 2/9] convert ParallelBitmapHeapState->state to an atomic
@ 2026-07-09 18:38 Nathan Bossart <nathan@postgresql.org>
  0 siblings, 0 replies; 440+ messages in thread

From: Nathan Bossart @ 2026-07-09 18:38 UTC (permalink / raw)

---
 src/backend/executor/nodeBitmapHeapscan.c | 23 +++++++----------------
 1 file changed, 7 insertions(+), 16 deletions(-)

diff --git a/src/backend/executor/nodeBitmapHeapscan.c b/src/backend/executor/nodeBitmapHeapscan.c
index 83d6478bc2b..a9e83f30687 100644
--- a/src/backend/executor/nodeBitmapHeapscan.c
+++ b/src/backend/executor/nodeBitmapHeapscan.c
@@ -79,7 +79,6 @@ typedef enum
 /* ----------------
  *	 ParallelBitmapHeapState information
  *		tbmiterator				iterator for scanning current pages
- *		mutex					mutual exclusion for state
  *		state					current state of the TIDBitmap
  *		cv						conditional wait variable
  * ----------------
@@ -87,8 +86,7 @@ typedef enum
 typedef struct ParallelBitmapHeapState
 {
 	dsa_pointer tbmiterator;
-	slock_t		mutex;
-	SharedBitmapState state;
+	pg_atomic_uint32 state;
 	ConditionVariable cv;
 } ParallelBitmapHeapState;
 
@@ -228,9 +226,7 @@ BitmapHeapNext(BitmapHeapScanState *node)
 static inline void
 BitmapDoneInitializingSharedState(ParallelBitmapHeapState *pstate)
 {
-	SpinLockAcquire(&pstate->mutex);
-	pstate->state = BM_FINISHED;
-	SpinLockRelease(&pstate->mutex);
+	pg_atomic_write_membarrier_u32(&pstate->state, BM_FINISHED);
 	ConditionVariableBroadcast(&pstate->cv);
 }
 
@@ -476,15 +472,12 @@ ExecInitBitmapHeapScan(BitmapHeapScan *node, EState *estate, int eflags)
 static bool
 BitmapShouldInitializeSharedState(ParallelBitmapHeapState *pstate)
 {
-	SharedBitmapState state;
+	uint32		state;
 
 	while (1)
 	{
-		SpinLockAcquire(&pstate->mutex);
-		state = pstate->state;
-		if (pstate->state == BM_INITIAL)
-			pstate->state = BM_INPROGRESS;
-		SpinLockRelease(&pstate->mutex);
+		state = BM_INITIAL;
+		pg_atomic_compare_exchange_u32(&pstate->state, &state, BM_INPROGRESS);
 
 		/* Exit if bitmap is done, or if we're the leader. */
 		if (state != BM_INPROGRESS)
@@ -538,9 +531,7 @@ ExecBitmapHeapInitializeDSM(BitmapHeapScanState *node,
 
 	pstate->tbmiterator = 0;
 
-	/* Initialize the mutex */
-	SpinLockInit(&pstate->mutex);
-	pstate->state = BM_INITIAL;
+	pg_atomic_init_u32(&pstate->state, BM_INITIAL);
 
 	ConditionVariableInit(&pstate->cv);
 
@@ -565,7 +556,7 @@ ExecBitmapHeapReInitializeDSM(BitmapHeapScanState *node,
 	if (dsa == NULL)
 		return;
 
-	pstate->state = BM_INITIAL;
+	pg_atomic_write_u32(&pstate->state, BM_INITIAL);
 
 	if (DsaPointerIsValid(pstate->tbmiterator))
 		tbm_free_shared_area(dsa, pstate->tbmiterator);
-- 
2.50.1 (Apple Git-155)


--Xf36GNcW+0xZNily
Content-Type: text/plain; charset=us-ascii
Content-Disposition: attachment;
	filename=v2-0003-convert-FixedParallelState-last_xlog_end-to-an-at.patch



^ permalink  raw  reply  [nested|flat] 440+ messages in thread

* [PATCH v2 2/9] convert ParallelBitmapHeapState->state to an atomic
@ 2026-07-09 18:38 Nathan Bossart <nathan@postgresql.org>
  0 siblings, 0 replies; 440+ messages in thread

From: Nathan Bossart @ 2026-07-09 18:38 UTC (permalink / raw)

---
 src/backend/executor/nodeBitmapHeapscan.c | 23 +++++++----------------
 1 file changed, 7 insertions(+), 16 deletions(-)

diff --git a/src/backend/executor/nodeBitmapHeapscan.c b/src/backend/executor/nodeBitmapHeapscan.c
index 83d6478bc2b..a9e83f30687 100644
--- a/src/backend/executor/nodeBitmapHeapscan.c
+++ b/src/backend/executor/nodeBitmapHeapscan.c
@@ -79,7 +79,6 @@ typedef enum
 /* ----------------
  *	 ParallelBitmapHeapState information
  *		tbmiterator				iterator for scanning current pages
- *		mutex					mutual exclusion for state
  *		state					current state of the TIDBitmap
  *		cv						conditional wait variable
  * ----------------
@@ -87,8 +86,7 @@ typedef enum
 typedef struct ParallelBitmapHeapState
 {
 	dsa_pointer tbmiterator;
-	slock_t		mutex;
-	SharedBitmapState state;
+	pg_atomic_uint32 state;
 	ConditionVariable cv;
 } ParallelBitmapHeapState;
 
@@ -228,9 +226,7 @@ BitmapHeapNext(BitmapHeapScanState *node)
 static inline void
 BitmapDoneInitializingSharedState(ParallelBitmapHeapState *pstate)
 {
-	SpinLockAcquire(&pstate->mutex);
-	pstate->state = BM_FINISHED;
-	SpinLockRelease(&pstate->mutex);
+	pg_atomic_write_membarrier_u32(&pstate->state, BM_FINISHED);
 	ConditionVariableBroadcast(&pstate->cv);
 }
 
@@ -476,15 +472,12 @@ ExecInitBitmapHeapScan(BitmapHeapScan *node, EState *estate, int eflags)
 static bool
 BitmapShouldInitializeSharedState(ParallelBitmapHeapState *pstate)
 {
-	SharedBitmapState state;
+	uint32		state;
 
 	while (1)
 	{
-		SpinLockAcquire(&pstate->mutex);
-		state = pstate->state;
-		if (pstate->state == BM_INITIAL)
-			pstate->state = BM_INPROGRESS;
-		SpinLockRelease(&pstate->mutex);
+		state = BM_INITIAL;
+		pg_atomic_compare_exchange_u32(&pstate->state, &state, BM_INPROGRESS);
 
 		/* Exit if bitmap is done, or if we're the leader. */
 		if (state != BM_INPROGRESS)
@@ -538,9 +531,7 @@ ExecBitmapHeapInitializeDSM(BitmapHeapScanState *node,
 
 	pstate->tbmiterator = 0;
 
-	/* Initialize the mutex */
-	SpinLockInit(&pstate->mutex);
-	pstate->state = BM_INITIAL;
+	pg_atomic_init_u32(&pstate->state, BM_INITIAL);
 
 	ConditionVariableInit(&pstate->cv);
 
@@ -565,7 +556,7 @@ ExecBitmapHeapReInitializeDSM(BitmapHeapScanState *node,
 	if (dsa == NULL)
 		return;
 
-	pstate->state = BM_INITIAL;
+	pg_atomic_write_u32(&pstate->state, BM_INITIAL);
 
 	if (DsaPointerIsValid(pstate->tbmiterator))
 		tbm_free_shared_area(dsa, pstate->tbmiterator);
-- 
2.50.1 (Apple Git-155)


--Xf36GNcW+0xZNily
Content-Type: text/plain; charset=us-ascii
Content-Disposition: attachment;
	filename=v2-0003-convert-FixedParallelState-last_xlog_end-to-an-at.patch



^ permalink  raw  reply  [nested|flat] 440+ messages in thread

* [PATCH v1 2/8] convert ParallelBitmapHeapState->state to an atomic
@ 2026-07-09 18:38 Nathan Bossart <nathan@postgresql.org>
  0 siblings, 0 replies; 440+ messages in thread

From: Nathan Bossart @ 2026-07-09 18:38 UTC (permalink / raw)

---
 src/backend/executor/nodeBitmapHeapscan.c | 21 ++++++---------------
 1 file changed, 6 insertions(+), 15 deletions(-)

diff --git a/src/backend/executor/nodeBitmapHeapscan.c b/src/backend/executor/nodeBitmapHeapscan.c
index 83d6478bc2b..f2bb487bf10 100644
--- a/src/backend/executor/nodeBitmapHeapscan.c
+++ b/src/backend/executor/nodeBitmapHeapscan.c
@@ -79,7 +79,6 @@ typedef enum
 /* ----------------
  *	 ParallelBitmapHeapState information
  *		tbmiterator				iterator for scanning current pages
- *		mutex					mutual exclusion for state
  *		state					current state of the TIDBitmap
  *		cv						conditional wait variable
  * ----------------
@@ -87,8 +86,7 @@ typedef enum
 typedef struct ParallelBitmapHeapState
 {
 	dsa_pointer tbmiterator;
-	slock_t		mutex;
-	SharedBitmapState state;
+	pg_atomic_uint32 state;
 	ConditionVariable cv;
 } ParallelBitmapHeapState;
 
@@ -228,9 +226,7 @@ BitmapHeapNext(BitmapHeapScanState *node)
 static inline void
 BitmapDoneInitializingSharedState(ParallelBitmapHeapState *pstate)
 {
-	SpinLockAcquire(&pstate->mutex);
-	pstate->state = BM_FINISHED;
-	SpinLockRelease(&pstate->mutex);
+	pg_atomic_write_membarrier_u32(&pstate->state, BM_FINISHED);
 	ConditionVariableBroadcast(&pstate->cv);
 }
 
@@ -480,11 +476,8 @@ BitmapShouldInitializeSharedState(ParallelBitmapHeapState *pstate)
 
 	while (1)
 	{
-		SpinLockAcquire(&pstate->mutex);
-		state = pstate->state;
-		if (pstate->state == BM_INITIAL)
-			pstate->state = BM_INPROGRESS;
-		SpinLockRelease(&pstate->mutex);
+		state = BM_INITIAL;
+		pg_atomic_compare_exchange_u32(&pstate->state, &state, BM_INPROGRESS);
 
 		/* Exit if bitmap is done, or if we're the leader. */
 		if (state != BM_INPROGRESS)
@@ -538,9 +531,7 @@ ExecBitmapHeapInitializeDSM(BitmapHeapScanState *node,
 
 	pstate->tbmiterator = 0;
 
-	/* Initialize the mutex */
-	SpinLockInit(&pstate->mutex);
-	pstate->state = BM_INITIAL;
+	pg_atomic_init_u32(&pstate->state, BM_INITIAL);
 
 	ConditionVariableInit(&pstate->cv);
 
@@ -565,7 +556,7 @@ ExecBitmapHeapReInitializeDSM(BitmapHeapScanState *node,
 	if (dsa == NULL)
 		return;
 
-	pstate->state = BM_INITIAL;
+	pg_atomic_write_u32(&pstate->state, BM_INITIAL);
 
 	if (DsaPointerIsValid(pstate->tbmiterator))
 		tbm_free_shared_area(dsa, pstate->tbmiterator);
-- 
2.50.1 (Apple Git-155)


--Ot5x3ffkWEuxilWO
Content-Type: text/plain; charset=us-ascii
Content-Disposition: attachment;
	filename=v1-0003-convert-FixedParallelState-last_xlog_end-to-an-at.patch



^ permalink  raw  reply  [nested|flat] 440+ messages in thread

* [PATCH v1 2/8] convert ParallelBitmapHeapState->state to an atomic
@ 2026-07-09 18:38 Nathan Bossart <nathan@postgresql.org>
  0 siblings, 0 replies; 440+ messages in thread

From: Nathan Bossart @ 2026-07-09 18:38 UTC (permalink / raw)

---
 src/backend/executor/nodeBitmapHeapscan.c | 21 ++++++---------------
 1 file changed, 6 insertions(+), 15 deletions(-)

diff --git a/src/backend/executor/nodeBitmapHeapscan.c b/src/backend/executor/nodeBitmapHeapscan.c
index 83d6478bc2b..f2bb487bf10 100644
--- a/src/backend/executor/nodeBitmapHeapscan.c
+++ b/src/backend/executor/nodeBitmapHeapscan.c
@@ -79,7 +79,6 @@ typedef enum
 /* ----------------
  *	 ParallelBitmapHeapState information
  *		tbmiterator				iterator for scanning current pages
- *		mutex					mutual exclusion for state
  *		state					current state of the TIDBitmap
  *		cv						conditional wait variable
  * ----------------
@@ -87,8 +86,7 @@ typedef enum
 typedef struct ParallelBitmapHeapState
 {
 	dsa_pointer tbmiterator;
-	slock_t		mutex;
-	SharedBitmapState state;
+	pg_atomic_uint32 state;
 	ConditionVariable cv;
 } ParallelBitmapHeapState;
 
@@ -228,9 +226,7 @@ BitmapHeapNext(BitmapHeapScanState *node)
 static inline void
 BitmapDoneInitializingSharedState(ParallelBitmapHeapState *pstate)
 {
-	SpinLockAcquire(&pstate->mutex);
-	pstate->state = BM_FINISHED;
-	SpinLockRelease(&pstate->mutex);
+	pg_atomic_write_membarrier_u32(&pstate->state, BM_FINISHED);
 	ConditionVariableBroadcast(&pstate->cv);
 }
 
@@ -480,11 +476,8 @@ BitmapShouldInitializeSharedState(ParallelBitmapHeapState *pstate)
 
 	while (1)
 	{
-		SpinLockAcquire(&pstate->mutex);
-		state = pstate->state;
-		if (pstate->state == BM_INITIAL)
-			pstate->state = BM_INPROGRESS;
-		SpinLockRelease(&pstate->mutex);
+		state = BM_INITIAL;
+		pg_atomic_compare_exchange_u32(&pstate->state, &state, BM_INPROGRESS);
 
 		/* Exit if bitmap is done, or if we're the leader. */
 		if (state != BM_INPROGRESS)
@@ -538,9 +531,7 @@ ExecBitmapHeapInitializeDSM(BitmapHeapScanState *node,
 
 	pstate->tbmiterator = 0;
 
-	/* Initialize the mutex */
-	SpinLockInit(&pstate->mutex);
-	pstate->state = BM_INITIAL;
+	pg_atomic_init_u32(&pstate->state, BM_INITIAL);
 
 	ConditionVariableInit(&pstate->cv);
 
@@ -565,7 +556,7 @@ ExecBitmapHeapReInitializeDSM(BitmapHeapScanState *node,
 	if (dsa == NULL)
 		return;
 
-	pstate->state = BM_INITIAL;
+	pg_atomic_write_u32(&pstate->state, BM_INITIAL);
 
 	if (DsaPointerIsValid(pstate->tbmiterator))
 		tbm_free_shared_area(dsa, pstate->tbmiterator);
-- 
2.50.1 (Apple Git-155)


--Ot5x3ffkWEuxilWO
Content-Type: text/plain; charset=us-ascii
Content-Disposition: attachment;
	filename=v1-0003-convert-FixedParallelState-last_xlog_end-to-an-at.patch



^ permalink  raw  reply  [nested|flat] 440+ messages in thread

* [PATCH v1 2/8] convert ParallelBitmapHeapState->state to an atomic
@ 2026-07-09 18:38 Nathan Bossart <nathan@postgresql.org>
  0 siblings, 0 replies; 440+ messages in thread

From: Nathan Bossart @ 2026-07-09 18:38 UTC (permalink / raw)

---
 src/backend/executor/nodeBitmapHeapscan.c | 21 ++++++---------------
 1 file changed, 6 insertions(+), 15 deletions(-)

diff --git a/src/backend/executor/nodeBitmapHeapscan.c b/src/backend/executor/nodeBitmapHeapscan.c
index 83d6478bc2b..f2bb487bf10 100644
--- a/src/backend/executor/nodeBitmapHeapscan.c
+++ b/src/backend/executor/nodeBitmapHeapscan.c
@@ -79,7 +79,6 @@ typedef enum
 /* ----------------
  *	 ParallelBitmapHeapState information
  *		tbmiterator				iterator for scanning current pages
- *		mutex					mutual exclusion for state
  *		state					current state of the TIDBitmap
  *		cv						conditional wait variable
  * ----------------
@@ -87,8 +86,7 @@ typedef enum
 typedef struct ParallelBitmapHeapState
 {
 	dsa_pointer tbmiterator;
-	slock_t		mutex;
-	SharedBitmapState state;
+	pg_atomic_uint32 state;
 	ConditionVariable cv;
 } ParallelBitmapHeapState;
 
@@ -228,9 +226,7 @@ BitmapHeapNext(BitmapHeapScanState *node)
 static inline void
 BitmapDoneInitializingSharedState(ParallelBitmapHeapState *pstate)
 {
-	SpinLockAcquire(&pstate->mutex);
-	pstate->state = BM_FINISHED;
-	SpinLockRelease(&pstate->mutex);
+	pg_atomic_write_membarrier_u32(&pstate->state, BM_FINISHED);
 	ConditionVariableBroadcast(&pstate->cv);
 }
 
@@ -480,11 +476,8 @@ BitmapShouldInitializeSharedState(ParallelBitmapHeapState *pstate)
 
 	while (1)
 	{
-		SpinLockAcquire(&pstate->mutex);
-		state = pstate->state;
-		if (pstate->state == BM_INITIAL)
-			pstate->state = BM_INPROGRESS;
-		SpinLockRelease(&pstate->mutex);
+		state = BM_INITIAL;
+		pg_atomic_compare_exchange_u32(&pstate->state, &state, BM_INPROGRESS);
 
 		/* Exit if bitmap is done, or if we're the leader. */
 		if (state != BM_INPROGRESS)
@@ -538,9 +531,7 @@ ExecBitmapHeapInitializeDSM(BitmapHeapScanState *node,
 
 	pstate->tbmiterator = 0;
 
-	/* Initialize the mutex */
-	SpinLockInit(&pstate->mutex);
-	pstate->state = BM_INITIAL;
+	pg_atomic_init_u32(&pstate->state, BM_INITIAL);
 
 	ConditionVariableInit(&pstate->cv);
 
@@ -565,7 +556,7 @@ ExecBitmapHeapReInitializeDSM(BitmapHeapScanState *node,
 	if (dsa == NULL)
 		return;
 
-	pstate->state = BM_INITIAL;
+	pg_atomic_write_u32(&pstate->state, BM_INITIAL);
 
 	if (DsaPointerIsValid(pstate->tbmiterator))
 		tbm_free_shared_area(dsa, pstate->tbmiterator);
-- 
2.50.1 (Apple Git-155)


--Ot5x3ffkWEuxilWO
Content-Type: text/plain; charset=us-ascii
Content-Disposition: attachment;
	filename=v1-0003-convert-FixedParallelState-last_xlog_end-to-an-at.patch



^ permalink  raw  reply  [nested|flat] 440+ messages in thread

* [PATCH v1 2/8] convert ParallelBitmapHeapState->state to an atomic
@ 2026-07-09 18:38 Nathan Bossart <nathan@postgresql.org>
  0 siblings, 0 replies; 440+ messages in thread

From: Nathan Bossart @ 2026-07-09 18:38 UTC (permalink / raw)

---
 src/backend/executor/nodeBitmapHeapscan.c | 21 ++++++---------------
 1 file changed, 6 insertions(+), 15 deletions(-)

diff --git a/src/backend/executor/nodeBitmapHeapscan.c b/src/backend/executor/nodeBitmapHeapscan.c
index 83d6478bc2b..f2bb487bf10 100644
--- a/src/backend/executor/nodeBitmapHeapscan.c
+++ b/src/backend/executor/nodeBitmapHeapscan.c
@@ -79,7 +79,6 @@ typedef enum
 /* ----------------
  *	 ParallelBitmapHeapState information
  *		tbmiterator				iterator for scanning current pages
- *		mutex					mutual exclusion for state
  *		state					current state of the TIDBitmap
  *		cv						conditional wait variable
  * ----------------
@@ -87,8 +86,7 @@ typedef enum
 typedef struct ParallelBitmapHeapState
 {
 	dsa_pointer tbmiterator;
-	slock_t		mutex;
-	SharedBitmapState state;
+	pg_atomic_uint32 state;
 	ConditionVariable cv;
 } ParallelBitmapHeapState;
 
@@ -228,9 +226,7 @@ BitmapHeapNext(BitmapHeapScanState *node)
 static inline void
 BitmapDoneInitializingSharedState(ParallelBitmapHeapState *pstate)
 {
-	SpinLockAcquire(&pstate->mutex);
-	pstate->state = BM_FINISHED;
-	SpinLockRelease(&pstate->mutex);
+	pg_atomic_write_membarrier_u32(&pstate->state, BM_FINISHED);
 	ConditionVariableBroadcast(&pstate->cv);
 }
 
@@ -480,11 +476,8 @@ BitmapShouldInitializeSharedState(ParallelBitmapHeapState *pstate)
 
 	while (1)
 	{
-		SpinLockAcquire(&pstate->mutex);
-		state = pstate->state;
-		if (pstate->state == BM_INITIAL)
-			pstate->state = BM_INPROGRESS;
-		SpinLockRelease(&pstate->mutex);
+		state = BM_INITIAL;
+		pg_atomic_compare_exchange_u32(&pstate->state, &state, BM_INPROGRESS);
 
 		/* Exit if bitmap is done, or if we're the leader. */
 		if (state != BM_INPROGRESS)
@@ -538,9 +531,7 @@ ExecBitmapHeapInitializeDSM(BitmapHeapScanState *node,
 
 	pstate->tbmiterator = 0;
 
-	/* Initialize the mutex */
-	SpinLockInit(&pstate->mutex);
-	pstate->state = BM_INITIAL;
+	pg_atomic_init_u32(&pstate->state, BM_INITIAL);
 
 	ConditionVariableInit(&pstate->cv);
 
@@ -565,7 +556,7 @@ ExecBitmapHeapReInitializeDSM(BitmapHeapScanState *node,
 	if (dsa == NULL)
 		return;
 
-	pstate->state = BM_INITIAL;
+	pg_atomic_write_u32(&pstate->state, BM_INITIAL);
 
 	if (DsaPointerIsValid(pstate->tbmiterator))
 		tbm_free_shared_area(dsa, pstate->tbmiterator);
-- 
2.50.1 (Apple Git-155)


--Ot5x3ffkWEuxilWO
Content-Type: text/plain; charset=us-ascii
Content-Disposition: attachment;
	filename=v1-0003-convert-FixedParallelState-last_xlog_end-to-an-at.patch



^ permalink  raw  reply  [nested|flat] 440+ messages in thread

* [PATCH v1 2/8] convert ParallelBitmapHeapState->state to an atomic
@ 2026-07-09 18:38 Nathan Bossart <nathan@postgresql.org>
  0 siblings, 0 replies; 440+ messages in thread

From: Nathan Bossart @ 2026-07-09 18:38 UTC (permalink / raw)

---
 src/backend/executor/nodeBitmapHeapscan.c | 21 ++++++---------------
 1 file changed, 6 insertions(+), 15 deletions(-)

diff --git a/src/backend/executor/nodeBitmapHeapscan.c b/src/backend/executor/nodeBitmapHeapscan.c
index 83d6478bc2b..f2bb487bf10 100644
--- a/src/backend/executor/nodeBitmapHeapscan.c
+++ b/src/backend/executor/nodeBitmapHeapscan.c
@@ -79,7 +79,6 @@ typedef enum
 /* ----------------
  *	 ParallelBitmapHeapState information
  *		tbmiterator				iterator for scanning current pages
- *		mutex					mutual exclusion for state
  *		state					current state of the TIDBitmap
  *		cv						conditional wait variable
  * ----------------
@@ -87,8 +86,7 @@ typedef enum
 typedef struct ParallelBitmapHeapState
 {
 	dsa_pointer tbmiterator;
-	slock_t		mutex;
-	SharedBitmapState state;
+	pg_atomic_uint32 state;
 	ConditionVariable cv;
 } ParallelBitmapHeapState;
 
@@ -228,9 +226,7 @@ BitmapHeapNext(BitmapHeapScanState *node)
 static inline void
 BitmapDoneInitializingSharedState(ParallelBitmapHeapState *pstate)
 {
-	SpinLockAcquire(&pstate->mutex);
-	pstate->state = BM_FINISHED;
-	SpinLockRelease(&pstate->mutex);
+	pg_atomic_write_membarrier_u32(&pstate->state, BM_FINISHED);
 	ConditionVariableBroadcast(&pstate->cv);
 }
 
@@ -480,11 +476,8 @@ BitmapShouldInitializeSharedState(ParallelBitmapHeapState *pstate)
 
 	while (1)
 	{
-		SpinLockAcquire(&pstate->mutex);
-		state = pstate->state;
-		if (pstate->state == BM_INITIAL)
-			pstate->state = BM_INPROGRESS;
-		SpinLockRelease(&pstate->mutex);
+		state = BM_INITIAL;
+		pg_atomic_compare_exchange_u32(&pstate->state, &state, BM_INPROGRESS);
 
 		/* Exit if bitmap is done, or if we're the leader. */
 		if (state != BM_INPROGRESS)
@@ -538,9 +531,7 @@ ExecBitmapHeapInitializeDSM(BitmapHeapScanState *node,
 
 	pstate->tbmiterator = 0;
 
-	/* Initialize the mutex */
-	SpinLockInit(&pstate->mutex);
-	pstate->state = BM_INITIAL;
+	pg_atomic_init_u32(&pstate->state, BM_INITIAL);
 
 	ConditionVariableInit(&pstate->cv);
 
@@ -565,7 +556,7 @@ ExecBitmapHeapReInitializeDSM(BitmapHeapScanState *node,
 	if (dsa == NULL)
 		return;
 
-	pstate->state = BM_INITIAL;
+	pg_atomic_write_u32(&pstate->state, BM_INITIAL);
 
 	if (DsaPointerIsValid(pstate->tbmiterator))
 		tbm_free_shared_area(dsa, pstate->tbmiterator);
-- 
2.50.1 (Apple Git-155)


--Ot5x3ffkWEuxilWO
Content-Type: text/plain; charset=us-ascii
Content-Disposition: attachment;
	filename=v1-0003-convert-FixedParallelState-last_xlog_end-to-an-at.patch



^ permalink  raw  reply  [nested|flat] 440+ messages in thread

* [PATCH v1 2/8] convert ParallelBitmapHeapState->state to an atomic
@ 2026-07-09 18:38 Nathan Bossart <nathan@postgresql.org>
  0 siblings, 0 replies; 440+ messages in thread

From: Nathan Bossart @ 2026-07-09 18:38 UTC (permalink / raw)

---
 src/backend/executor/nodeBitmapHeapscan.c | 21 ++++++---------------
 1 file changed, 6 insertions(+), 15 deletions(-)

diff --git a/src/backend/executor/nodeBitmapHeapscan.c b/src/backend/executor/nodeBitmapHeapscan.c
index 83d6478bc2b..f2bb487bf10 100644
--- a/src/backend/executor/nodeBitmapHeapscan.c
+++ b/src/backend/executor/nodeBitmapHeapscan.c
@@ -79,7 +79,6 @@ typedef enum
 /* ----------------
  *	 ParallelBitmapHeapState information
  *		tbmiterator				iterator for scanning current pages
- *		mutex					mutual exclusion for state
  *		state					current state of the TIDBitmap
  *		cv						conditional wait variable
  * ----------------
@@ -87,8 +86,7 @@ typedef enum
 typedef struct ParallelBitmapHeapState
 {
 	dsa_pointer tbmiterator;
-	slock_t		mutex;
-	SharedBitmapState state;
+	pg_atomic_uint32 state;
 	ConditionVariable cv;
 } ParallelBitmapHeapState;
 
@@ -228,9 +226,7 @@ BitmapHeapNext(BitmapHeapScanState *node)
 static inline void
 BitmapDoneInitializingSharedState(ParallelBitmapHeapState *pstate)
 {
-	SpinLockAcquire(&pstate->mutex);
-	pstate->state = BM_FINISHED;
-	SpinLockRelease(&pstate->mutex);
+	pg_atomic_write_membarrier_u32(&pstate->state, BM_FINISHED);
 	ConditionVariableBroadcast(&pstate->cv);
 }
 
@@ -480,11 +476,8 @@ BitmapShouldInitializeSharedState(ParallelBitmapHeapState *pstate)
 
 	while (1)
 	{
-		SpinLockAcquire(&pstate->mutex);
-		state = pstate->state;
-		if (pstate->state == BM_INITIAL)
-			pstate->state = BM_INPROGRESS;
-		SpinLockRelease(&pstate->mutex);
+		state = BM_INITIAL;
+		pg_atomic_compare_exchange_u32(&pstate->state, &state, BM_INPROGRESS);
 
 		/* Exit if bitmap is done, or if we're the leader. */
 		if (state != BM_INPROGRESS)
@@ -538,9 +531,7 @@ ExecBitmapHeapInitializeDSM(BitmapHeapScanState *node,
 
 	pstate->tbmiterator = 0;
 
-	/* Initialize the mutex */
-	SpinLockInit(&pstate->mutex);
-	pstate->state = BM_INITIAL;
+	pg_atomic_init_u32(&pstate->state, BM_INITIAL);
 
 	ConditionVariableInit(&pstate->cv);
 
@@ -565,7 +556,7 @@ ExecBitmapHeapReInitializeDSM(BitmapHeapScanState *node,
 	if (dsa == NULL)
 		return;
 
-	pstate->state = BM_INITIAL;
+	pg_atomic_write_u32(&pstate->state, BM_INITIAL);
 
 	if (DsaPointerIsValid(pstate->tbmiterator))
 		tbm_free_shared_area(dsa, pstate->tbmiterator);
-- 
2.50.1 (Apple Git-155)


--Ot5x3ffkWEuxilWO
Content-Type: text/plain; charset=us-ascii
Content-Disposition: attachment;
	filename=v1-0003-convert-FixedParallelState-last_xlog_end-to-an-at.patch



^ permalink  raw  reply  [nested|flat] 440+ messages in thread

* [PATCH v2 2/9] convert ParallelBitmapHeapState->state to an atomic
@ 2026-07-09 18:38 Nathan Bossart <nathan@postgresql.org>
  0 siblings, 0 replies; 440+ messages in thread

From: Nathan Bossart @ 2026-07-09 18:38 UTC (permalink / raw)

---
 src/backend/executor/nodeBitmapHeapscan.c | 23 +++++++----------------
 1 file changed, 7 insertions(+), 16 deletions(-)

diff --git a/src/backend/executor/nodeBitmapHeapscan.c b/src/backend/executor/nodeBitmapHeapscan.c
index 83d6478bc2b..a9e83f30687 100644
--- a/src/backend/executor/nodeBitmapHeapscan.c
+++ b/src/backend/executor/nodeBitmapHeapscan.c
@@ -79,7 +79,6 @@ typedef enum
 /* ----------------
  *	 ParallelBitmapHeapState information
  *		tbmiterator				iterator for scanning current pages
- *		mutex					mutual exclusion for state
  *		state					current state of the TIDBitmap
  *		cv						conditional wait variable
  * ----------------
@@ -87,8 +86,7 @@ typedef enum
 typedef struct ParallelBitmapHeapState
 {
 	dsa_pointer tbmiterator;
-	slock_t		mutex;
-	SharedBitmapState state;
+	pg_atomic_uint32 state;
 	ConditionVariable cv;
 } ParallelBitmapHeapState;
 
@@ -228,9 +226,7 @@ BitmapHeapNext(BitmapHeapScanState *node)
 static inline void
 BitmapDoneInitializingSharedState(ParallelBitmapHeapState *pstate)
 {
-	SpinLockAcquire(&pstate->mutex);
-	pstate->state = BM_FINISHED;
-	SpinLockRelease(&pstate->mutex);
+	pg_atomic_write_membarrier_u32(&pstate->state, BM_FINISHED);
 	ConditionVariableBroadcast(&pstate->cv);
 }
 
@@ -476,15 +472,12 @@ ExecInitBitmapHeapScan(BitmapHeapScan *node, EState *estate, int eflags)
 static bool
 BitmapShouldInitializeSharedState(ParallelBitmapHeapState *pstate)
 {
-	SharedBitmapState state;
+	uint32		state;
 
 	while (1)
 	{
-		SpinLockAcquire(&pstate->mutex);
-		state = pstate->state;
-		if (pstate->state == BM_INITIAL)
-			pstate->state = BM_INPROGRESS;
-		SpinLockRelease(&pstate->mutex);
+		state = BM_INITIAL;
+		pg_atomic_compare_exchange_u32(&pstate->state, &state, BM_INPROGRESS);
 
 		/* Exit if bitmap is done, or if we're the leader. */
 		if (state != BM_INPROGRESS)
@@ -538,9 +531,7 @@ ExecBitmapHeapInitializeDSM(BitmapHeapScanState *node,
 
 	pstate->tbmiterator = 0;
 
-	/* Initialize the mutex */
-	SpinLockInit(&pstate->mutex);
-	pstate->state = BM_INITIAL;
+	pg_atomic_init_u32(&pstate->state, BM_INITIAL);
 
 	ConditionVariableInit(&pstate->cv);
 
@@ -565,7 +556,7 @@ ExecBitmapHeapReInitializeDSM(BitmapHeapScanState *node,
 	if (dsa == NULL)
 		return;
 
-	pstate->state = BM_INITIAL;
+	pg_atomic_write_u32(&pstate->state, BM_INITIAL);
 
 	if (DsaPointerIsValid(pstate->tbmiterator))
 		tbm_free_shared_area(dsa, pstate->tbmiterator);
-- 
2.50.1 (Apple Git-155)


--Xf36GNcW+0xZNily
Content-Type: text/plain; charset=us-ascii
Content-Disposition: attachment;
	filename=v2-0003-convert-FixedParallelState-last_xlog_end-to-an-at.patch



^ permalink  raw  reply  [nested|flat] 440+ messages in thread

* [PATCH v1 2/8] convert ParallelBitmapHeapState->state to an atomic
@ 2026-07-09 18:38 Nathan Bossart <nathan@postgresql.org>
  0 siblings, 0 replies; 440+ messages in thread

From: Nathan Bossart @ 2026-07-09 18:38 UTC (permalink / raw)

---
 src/backend/executor/nodeBitmapHeapscan.c | 21 ++++++---------------
 1 file changed, 6 insertions(+), 15 deletions(-)

diff --git a/src/backend/executor/nodeBitmapHeapscan.c b/src/backend/executor/nodeBitmapHeapscan.c
index 83d6478bc2b..f2bb487bf10 100644
--- a/src/backend/executor/nodeBitmapHeapscan.c
+++ b/src/backend/executor/nodeBitmapHeapscan.c
@@ -79,7 +79,6 @@ typedef enum
 /* ----------------
  *	 ParallelBitmapHeapState information
  *		tbmiterator				iterator for scanning current pages
- *		mutex					mutual exclusion for state
  *		state					current state of the TIDBitmap
  *		cv						conditional wait variable
  * ----------------
@@ -87,8 +86,7 @@ typedef enum
 typedef struct ParallelBitmapHeapState
 {
 	dsa_pointer tbmiterator;
-	slock_t		mutex;
-	SharedBitmapState state;
+	pg_atomic_uint32 state;
 	ConditionVariable cv;
 } ParallelBitmapHeapState;
 
@@ -228,9 +226,7 @@ BitmapHeapNext(BitmapHeapScanState *node)
 static inline void
 BitmapDoneInitializingSharedState(ParallelBitmapHeapState *pstate)
 {
-	SpinLockAcquire(&pstate->mutex);
-	pstate->state = BM_FINISHED;
-	SpinLockRelease(&pstate->mutex);
+	pg_atomic_write_membarrier_u32(&pstate->state, BM_FINISHED);
 	ConditionVariableBroadcast(&pstate->cv);
 }
 
@@ -480,11 +476,8 @@ BitmapShouldInitializeSharedState(ParallelBitmapHeapState *pstate)
 
 	while (1)
 	{
-		SpinLockAcquire(&pstate->mutex);
-		state = pstate->state;
-		if (pstate->state == BM_INITIAL)
-			pstate->state = BM_INPROGRESS;
-		SpinLockRelease(&pstate->mutex);
+		state = BM_INITIAL;
+		pg_atomic_compare_exchange_u32(&pstate->state, &state, BM_INPROGRESS);
 
 		/* Exit if bitmap is done, or if we're the leader. */
 		if (state != BM_INPROGRESS)
@@ -538,9 +531,7 @@ ExecBitmapHeapInitializeDSM(BitmapHeapScanState *node,
 
 	pstate->tbmiterator = 0;
 
-	/* Initialize the mutex */
-	SpinLockInit(&pstate->mutex);
-	pstate->state = BM_INITIAL;
+	pg_atomic_init_u32(&pstate->state, BM_INITIAL);
 
 	ConditionVariableInit(&pstate->cv);
 
@@ -565,7 +556,7 @@ ExecBitmapHeapReInitializeDSM(BitmapHeapScanState *node,
 	if (dsa == NULL)
 		return;
 
-	pstate->state = BM_INITIAL;
+	pg_atomic_write_u32(&pstate->state, BM_INITIAL);
 
 	if (DsaPointerIsValid(pstate->tbmiterator))
 		tbm_free_shared_area(dsa, pstate->tbmiterator);
-- 
2.50.1 (Apple Git-155)


--Ot5x3ffkWEuxilWO
Content-Type: text/plain; charset=us-ascii
Content-Disposition: attachment;
	filename=v1-0003-convert-FixedParallelState-last_xlog_end-to-an-at.patch



^ permalink  raw  reply  [nested|flat] 440+ messages in thread

* [PATCH v1 2/8] convert ParallelBitmapHeapState->state to an atomic
@ 2026-07-09 18:38 Nathan Bossart <nathan@postgresql.org>
  0 siblings, 0 replies; 440+ messages in thread

From: Nathan Bossart @ 2026-07-09 18:38 UTC (permalink / raw)

---
 src/backend/executor/nodeBitmapHeapscan.c | 21 ++++++---------------
 1 file changed, 6 insertions(+), 15 deletions(-)

diff --git a/src/backend/executor/nodeBitmapHeapscan.c b/src/backend/executor/nodeBitmapHeapscan.c
index 83d6478bc2b..f2bb487bf10 100644
--- a/src/backend/executor/nodeBitmapHeapscan.c
+++ b/src/backend/executor/nodeBitmapHeapscan.c
@@ -79,7 +79,6 @@ typedef enum
 /* ----------------
  *	 ParallelBitmapHeapState information
  *		tbmiterator				iterator for scanning current pages
- *		mutex					mutual exclusion for state
  *		state					current state of the TIDBitmap
  *		cv						conditional wait variable
  * ----------------
@@ -87,8 +86,7 @@ typedef enum
 typedef struct ParallelBitmapHeapState
 {
 	dsa_pointer tbmiterator;
-	slock_t		mutex;
-	SharedBitmapState state;
+	pg_atomic_uint32 state;
 	ConditionVariable cv;
 } ParallelBitmapHeapState;
 
@@ -228,9 +226,7 @@ BitmapHeapNext(BitmapHeapScanState *node)
 static inline void
 BitmapDoneInitializingSharedState(ParallelBitmapHeapState *pstate)
 {
-	SpinLockAcquire(&pstate->mutex);
-	pstate->state = BM_FINISHED;
-	SpinLockRelease(&pstate->mutex);
+	pg_atomic_write_membarrier_u32(&pstate->state, BM_FINISHED);
 	ConditionVariableBroadcast(&pstate->cv);
 }
 
@@ -480,11 +476,8 @@ BitmapShouldInitializeSharedState(ParallelBitmapHeapState *pstate)
 
 	while (1)
 	{
-		SpinLockAcquire(&pstate->mutex);
-		state = pstate->state;
-		if (pstate->state == BM_INITIAL)
-			pstate->state = BM_INPROGRESS;
-		SpinLockRelease(&pstate->mutex);
+		state = BM_INITIAL;
+		pg_atomic_compare_exchange_u32(&pstate->state, &state, BM_INPROGRESS);
 
 		/* Exit if bitmap is done, or if we're the leader. */
 		if (state != BM_INPROGRESS)
@@ -538,9 +531,7 @@ ExecBitmapHeapInitializeDSM(BitmapHeapScanState *node,
 
 	pstate->tbmiterator = 0;
 
-	/* Initialize the mutex */
-	SpinLockInit(&pstate->mutex);
-	pstate->state = BM_INITIAL;
+	pg_atomic_init_u32(&pstate->state, BM_INITIAL);
 
 	ConditionVariableInit(&pstate->cv);
 
@@ -565,7 +556,7 @@ ExecBitmapHeapReInitializeDSM(BitmapHeapScanState *node,
 	if (dsa == NULL)
 		return;
 
-	pstate->state = BM_INITIAL;
+	pg_atomic_write_u32(&pstate->state, BM_INITIAL);
 
 	if (DsaPointerIsValid(pstate->tbmiterator))
 		tbm_free_shared_area(dsa, pstate->tbmiterator);
-- 
2.50.1 (Apple Git-155)


--Ot5x3ffkWEuxilWO
Content-Type: text/plain; charset=us-ascii
Content-Disposition: attachment;
	filename=v1-0003-convert-FixedParallelState-last_xlog_end-to-an-at.patch



^ permalink  raw  reply  [nested|flat] 440+ messages in thread

* [PATCH v1 2/8] convert ParallelBitmapHeapState->state to an atomic
@ 2026-07-09 18:38 Nathan Bossart <nathan@postgresql.org>
  0 siblings, 0 replies; 440+ messages in thread

From: Nathan Bossart @ 2026-07-09 18:38 UTC (permalink / raw)

---
 src/backend/executor/nodeBitmapHeapscan.c | 21 ++++++---------------
 1 file changed, 6 insertions(+), 15 deletions(-)

diff --git a/src/backend/executor/nodeBitmapHeapscan.c b/src/backend/executor/nodeBitmapHeapscan.c
index 83d6478bc2b..f2bb487bf10 100644
--- a/src/backend/executor/nodeBitmapHeapscan.c
+++ b/src/backend/executor/nodeBitmapHeapscan.c
@@ -79,7 +79,6 @@ typedef enum
 /* ----------------
  *	 ParallelBitmapHeapState information
  *		tbmiterator				iterator for scanning current pages
- *		mutex					mutual exclusion for state
  *		state					current state of the TIDBitmap
  *		cv						conditional wait variable
  * ----------------
@@ -87,8 +86,7 @@ typedef enum
 typedef struct ParallelBitmapHeapState
 {
 	dsa_pointer tbmiterator;
-	slock_t		mutex;
-	SharedBitmapState state;
+	pg_atomic_uint32 state;
 	ConditionVariable cv;
 } ParallelBitmapHeapState;
 
@@ -228,9 +226,7 @@ BitmapHeapNext(BitmapHeapScanState *node)
 static inline void
 BitmapDoneInitializingSharedState(ParallelBitmapHeapState *pstate)
 {
-	SpinLockAcquire(&pstate->mutex);
-	pstate->state = BM_FINISHED;
-	SpinLockRelease(&pstate->mutex);
+	pg_atomic_write_membarrier_u32(&pstate->state, BM_FINISHED);
 	ConditionVariableBroadcast(&pstate->cv);
 }
 
@@ -480,11 +476,8 @@ BitmapShouldInitializeSharedState(ParallelBitmapHeapState *pstate)
 
 	while (1)
 	{
-		SpinLockAcquire(&pstate->mutex);
-		state = pstate->state;
-		if (pstate->state == BM_INITIAL)
-			pstate->state = BM_INPROGRESS;
-		SpinLockRelease(&pstate->mutex);
+		state = BM_INITIAL;
+		pg_atomic_compare_exchange_u32(&pstate->state, &state, BM_INPROGRESS);
 
 		/* Exit if bitmap is done, or if we're the leader. */
 		if (state != BM_INPROGRESS)
@@ -538,9 +531,7 @@ ExecBitmapHeapInitializeDSM(BitmapHeapScanState *node,
 
 	pstate->tbmiterator = 0;
 
-	/* Initialize the mutex */
-	SpinLockInit(&pstate->mutex);
-	pstate->state = BM_INITIAL;
+	pg_atomic_init_u32(&pstate->state, BM_INITIAL);
 
 	ConditionVariableInit(&pstate->cv);
 
@@ -565,7 +556,7 @@ ExecBitmapHeapReInitializeDSM(BitmapHeapScanState *node,
 	if (dsa == NULL)
 		return;
 
-	pstate->state = BM_INITIAL;
+	pg_atomic_write_u32(&pstate->state, BM_INITIAL);
 
 	if (DsaPointerIsValid(pstate->tbmiterator))
 		tbm_free_shared_area(dsa, pstate->tbmiterator);
-- 
2.50.1 (Apple Git-155)


--Ot5x3ffkWEuxilWO
Content-Type: text/plain; charset=us-ascii
Content-Disposition: attachment;
	filename=v1-0003-convert-FixedParallelState-last_xlog_end-to-an-at.patch



^ permalink  raw  reply  [nested|flat] 440+ messages in thread

* [PATCH v2 2/9] convert ParallelBitmapHeapState->state to an atomic
@ 2026-07-09 18:38 Nathan Bossart <nathan@postgresql.org>
  0 siblings, 0 replies; 440+ messages in thread

From: Nathan Bossart @ 2026-07-09 18:38 UTC (permalink / raw)

---
 src/backend/executor/nodeBitmapHeapscan.c | 23 +++++++----------------
 1 file changed, 7 insertions(+), 16 deletions(-)

diff --git a/src/backend/executor/nodeBitmapHeapscan.c b/src/backend/executor/nodeBitmapHeapscan.c
index 83d6478bc2b..a9e83f30687 100644
--- a/src/backend/executor/nodeBitmapHeapscan.c
+++ b/src/backend/executor/nodeBitmapHeapscan.c
@@ -79,7 +79,6 @@ typedef enum
 /* ----------------
  *	 ParallelBitmapHeapState information
  *		tbmiterator				iterator for scanning current pages
- *		mutex					mutual exclusion for state
  *		state					current state of the TIDBitmap
  *		cv						conditional wait variable
  * ----------------
@@ -87,8 +86,7 @@ typedef enum
 typedef struct ParallelBitmapHeapState
 {
 	dsa_pointer tbmiterator;
-	slock_t		mutex;
-	SharedBitmapState state;
+	pg_atomic_uint32 state;
 	ConditionVariable cv;
 } ParallelBitmapHeapState;
 
@@ -228,9 +226,7 @@ BitmapHeapNext(BitmapHeapScanState *node)
 static inline void
 BitmapDoneInitializingSharedState(ParallelBitmapHeapState *pstate)
 {
-	SpinLockAcquire(&pstate->mutex);
-	pstate->state = BM_FINISHED;
-	SpinLockRelease(&pstate->mutex);
+	pg_atomic_write_membarrier_u32(&pstate->state, BM_FINISHED);
 	ConditionVariableBroadcast(&pstate->cv);
 }
 
@@ -476,15 +472,12 @@ ExecInitBitmapHeapScan(BitmapHeapScan *node, EState *estate, int eflags)
 static bool
 BitmapShouldInitializeSharedState(ParallelBitmapHeapState *pstate)
 {
-	SharedBitmapState state;
+	uint32		state;
 
 	while (1)
 	{
-		SpinLockAcquire(&pstate->mutex);
-		state = pstate->state;
-		if (pstate->state == BM_INITIAL)
-			pstate->state = BM_INPROGRESS;
-		SpinLockRelease(&pstate->mutex);
+		state = BM_INITIAL;
+		pg_atomic_compare_exchange_u32(&pstate->state, &state, BM_INPROGRESS);
 
 		/* Exit if bitmap is done, or if we're the leader. */
 		if (state != BM_INPROGRESS)
@@ -538,9 +531,7 @@ ExecBitmapHeapInitializeDSM(BitmapHeapScanState *node,
 
 	pstate->tbmiterator = 0;
 
-	/* Initialize the mutex */
-	SpinLockInit(&pstate->mutex);
-	pstate->state = BM_INITIAL;
+	pg_atomic_init_u32(&pstate->state, BM_INITIAL);
 
 	ConditionVariableInit(&pstate->cv);
 
@@ -565,7 +556,7 @@ ExecBitmapHeapReInitializeDSM(BitmapHeapScanState *node,
 	if (dsa == NULL)
 		return;
 
-	pstate->state = BM_INITIAL;
+	pg_atomic_write_u32(&pstate->state, BM_INITIAL);
 
 	if (DsaPointerIsValid(pstate->tbmiterator))
 		tbm_free_shared_area(dsa, pstate->tbmiterator);
-- 
2.50.1 (Apple Git-155)


--Xf36GNcW+0xZNily
Content-Type: text/plain; charset=us-ascii
Content-Disposition: attachment;
	filename=v2-0003-convert-FixedParallelState-last_xlog_end-to-an-at.patch



^ permalink  raw  reply  [nested|flat] 440+ messages in thread

* [PATCH v2 2/9] convert ParallelBitmapHeapState->state to an atomic
@ 2026-07-09 18:38 Nathan Bossart <nathan@postgresql.org>
  0 siblings, 0 replies; 440+ messages in thread

From: Nathan Bossart @ 2026-07-09 18:38 UTC (permalink / raw)

---
 src/backend/executor/nodeBitmapHeapscan.c | 23 +++++++----------------
 1 file changed, 7 insertions(+), 16 deletions(-)

diff --git a/src/backend/executor/nodeBitmapHeapscan.c b/src/backend/executor/nodeBitmapHeapscan.c
index 83d6478bc2b..a9e83f30687 100644
--- a/src/backend/executor/nodeBitmapHeapscan.c
+++ b/src/backend/executor/nodeBitmapHeapscan.c
@@ -79,7 +79,6 @@ typedef enum
 /* ----------------
  *	 ParallelBitmapHeapState information
  *		tbmiterator				iterator for scanning current pages
- *		mutex					mutual exclusion for state
  *		state					current state of the TIDBitmap
  *		cv						conditional wait variable
  * ----------------
@@ -87,8 +86,7 @@ typedef enum
 typedef struct ParallelBitmapHeapState
 {
 	dsa_pointer tbmiterator;
-	slock_t		mutex;
-	SharedBitmapState state;
+	pg_atomic_uint32 state;
 	ConditionVariable cv;
 } ParallelBitmapHeapState;
 
@@ -228,9 +226,7 @@ BitmapHeapNext(BitmapHeapScanState *node)
 static inline void
 BitmapDoneInitializingSharedState(ParallelBitmapHeapState *pstate)
 {
-	SpinLockAcquire(&pstate->mutex);
-	pstate->state = BM_FINISHED;
-	SpinLockRelease(&pstate->mutex);
+	pg_atomic_write_membarrier_u32(&pstate->state, BM_FINISHED);
 	ConditionVariableBroadcast(&pstate->cv);
 }
 
@@ -476,15 +472,12 @@ ExecInitBitmapHeapScan(BitmapHeapScan *node, EState *estate, int eflags)
 static bool
 BitmapShouldInitializeSharedState(ParallelBitmapHeapState *pstate)
 {
-	SharedBitmapState state;
+	uint32		state;
 
 	while (1)
 	{
-		SpinLockAcquire(&pstate->mutex);
-		state = pstate->state;
-		if (pstate->state == BM_INITIAL)
-			pstate->state = BM_INPROGRESS;
-		SpinLockRelease(&pstate->mutex);
+		state = BM_INITIAL;
+		pg_atomic_compare_exchange_u32(&pstate->state, &state, BM_INPROGRESS);
 
 		/* Exit if bitmap is done, or if we're the leader. */
 		if (state != BM_INPROGRESS)
@@ -538,9 +531,7 @@ ExecBitmapHeapInitializeDSM(BitmapHeapScanState *node,
 
 	pstate->tbmiterator = 0;
 
-	/* Initialize the mutex */
-	SpinLockInit(&pstate->mutex);
-	pstate->state = BM_INITIAL;
+	pg_atomic_init_u32(&pstate->state, BM_INITIAL);
 
 	ConditionVariableInit(&pstate->cv);
 
@@ -565,7 +556,7 @@ ExecBitmapHeapReInitializeDSM(BitmapHeapScanState *node,
 	if (dsa == NULL)
 		return;
 
-	pstate->state = BM_INITIAL;
+	pg_atomic_write_u32(&pstate->state, BM_INITIAL);
 
 	if (DsaPointerIsValid(pstate->tbmiterator))
 		tbm_free_shared_area(dsa, pstate->tbmiterator);
-- 
2.50.1 (Apple Git-155)


--Xf36GNcW+0xZNily
Content-Type: text/plain; charset=us-ascii
Content-Disposition: attachment;
	filename=v2-0003-convert-FixedParallelState-last_xlog_end-to-an-at.patch



^ permalink  raw  reply  [nested|flat] 440+ messages in thread

* [PATCH v2 2/9] convert ParallelBitmapHeapState->state to an atomic
@ 2026-07-09 18:38 Nathan Bossart <nathan@postgresql.org>
  0 siblings, 0 replies; 440+ messages in thread

From: Nathan Bossart @ 2026-07-09 18:38 UTC (permalink / raw)

---
 src/backend/executor/nodeBitmapHeapscan.c | 23 +++++++----------------
 1 file changed, 7 insertions(+), 16 deletions(-)

diff --git a/src/backend/executor/nodeBitmapHeapscan.c b/src/backend/executor/nodeBitmapHeapscan.c
index 83d6478bc2b..a9e83f30687 100644
--- a/src/backend/executor/nodeBitmapHeapscan.c
+++ b/src/backend/executor/nodeBitmapHeapscan.c
@@ -79,7 +79,6 @@ typedef enum
 /* ----------------
  *	 ParallelBitmapHeapState information
  *		tbmiterator				iterator for scanning current pages
- *		mutex					mutual exclusion for state
  *		state					current state of the TIDBitmap
  *		cv						conditional wait variable
  * ----------------
@@ -87,8 +86,7 @@ typedef enum
 typedef struct ParallelBitmapHeapState
 {
 	dsa_pointer tbmiterator;
-	slock_t		mutex;
-	SharedBitmapState state;
+	pg_atomic_uint32 state;
 	ConditionVariable cv;
 } ParallelBitmapHeapState;
 
@@ -228,9 +226,7 @@ BitmapHeapNext(BitmapHeapScanState *node)
 static inline void
 BitmapDoneInitializingSharedState(ParallelBitmapHeapState *pstate)
 {
-	SpinLockAcquire(&pstate->mutex);
-	pstate->state = BM_FINISHED;
-	SpinLockRelease(&pstate->mutex);
+	pg_atomic_write_membarrier_u32(&pstate->state, BM_FINISHED);
 	ConditionVariableBroadcast(&pstate->cv);
 }
 
@@ -476,15 +472,12 @@ ExecInitBitmapHeapScan(BitmapHeapScan *node, EState *estate, int eflags)
 static bool
 BitmapShouldInitializeSharedState(ParallelBitmapHeapState *pstate)
 {
-	SharedBitmapState state;
+	uint32		state;
 
 	while (1)
 	{
-		SpinLockAcquire(&pstate->mutex);
-		state = pstate->state;
-		if (pstate->state == BM_INITIAL)
-			pstate->state = BM_INPROGRESS;
-		SpinLockRelease(&pstate->mutex);
+		state = BM_INITIAL;
+		pg_atomic_compare_exchange_u32(&pstate->state, &state, BM_INPROGRESS);
 
 		/* Exit if bitmap is done, or if we're the leader. */
 		if (state != BM_INPROGRESS)
@@ -538,9 +531,7 @@ ExecBitmapHeapInitializeDSM(BitmapHeapScanState *node,
 
 	pstate->tbmiterator = 0;
 
-	/* Initialize the mutex */
-	SpinLockInit(&pstate->mutex);
-	pstate->state = BM_INITIAL;
+	pg_atomic_init_u32(&pstate->state, BM_INITIAL);
 
 	ConditionVariableInit(&pstate->cv);
 
@@ -565,7 +556,7 @@ ExecBitmapHeapReInitializeDSM(BitmapHeapScanState *node,
 	if (dsa == NULL)
 		return;
 
-	pstate->state = BM_INITIAL;
+	pg_atomic_write_u32(&pstate->state, BM_INITIAL);
 
 	if (DsaPointerIsValid(pstate->tbmiterator))
 		tbm_free_shared_area(dsa, pstate->tbmiterator);
-- 
2.50.1 (Apple Git-155)


--Xf36GNcW+0xZNily
Content-Type: text/plain; charset=us-ascii
Content-Disposition: attachment;
	filename=v2-0003-convert-FixedParallelState-last_xlog_end-to-an-at.patch



^ permalink  raw  reply  [nested|flat] 440+ messages in thread

* [PATCH v2 2/9] convert ParallelBitmapHeapState->state to an atomic
@ 2026-07-09 18:38 Nathan Bossart <nathan@postgresql.org>
  0 siblings, 0 replies; 440+ messages in thread

From: Nathan Bossart @ 2026-07-09 18:38 UTC (permalink / raw)

---
 src/backend/executor/nodeBitmapHeapscan.c | 23 +++++++----------------
 1 file changed, 7 insertions(+), 16 deletions(-)

diff --git a/src/backend/executor/nodeBitmapHeapscan.c b/src/backend/executor/nodeBitmapHeapscan.c
index 83d6478bc2b..a9e83f30687 100644
--- a/src/backend/executor/nodeBitmapHeapscan.c
+++ b/src/backend/executor/nodeBitmapHeapscan.c
@@ -79,7 +79,6 @@ typedef enum
 /* ----------------
  *	 ParallelBitmapHeapState information
  *		tbmiterator				iterator for scanning current pages
- *		mutex					mutual exclusion for state
  *		state					current state of the TIDBitmap
  *		cv						conditional wait variable
  * ----------------
@@ -87,8 +86,7 @@ typedef enum
 typedef struct ParallelBitmapHeapState
 {
 	dsa_pointer tbmiterator;
-	slock_t		mutex;
-	SharedBitmapState state;
+	pg_atomic_uint32 state;
 	ConditionVariable cv;
 } ParallelBitmapHeapState;
 
@@ -228,9 +226,7 @@ BitmapHeapNext(BitmapHeapScanState *node)
 static inline void
 BitmapDoneInitializingSharedState(ParallelBitmapHeapState *pstate)
 {
-	SpinLockAcquire(&pstate->mutex);
-	pstate->state = BM_FINISHED;
-	SpinLockRelease(&pstate->mutex);
+	pg_atomic_write_membarrier_u32(&pstate->state, BM_FINISHED);
 	ConditionVariableBroadcast(&pstate->cv);
 }
 
@@ -476,15 +472,12 @@ ExecInitBitmapHeapScan(BitmapHeapScan *node, EState *estate, int eflags)
 static bool
 BitmapShouldInitializeSharedState(ParallelBitmapHeapState *pstate)
 {
-	SharedBitmapState state;
+	uint32		state;
 
 	while (1)
 	{
-		SpinLockAcquire(&pstate->mutex);
-		state = pstate->state;
-		if (pstate->state == BM_INITIAL)
-			pstate->state = BM_INPROGRESS;
-		SpinLockRelease(&pstate->mutex);
+		state = BM_INITIAL;
+		pg_atomic_compare_exchange_u32(&pstate->state, &state, BM_INPROGRESS);
 
 		/* Exit if bitmap is done, or if we're the leader. */
 		if (state != BM_INPROGRESS)
@@ -538,9 +531,7 @@ ExecBitmapHeapInitializeDSM(BitmapHeapScanState *node,
 
 	pstate->tbmiterator = 0;
 
-	/* Initialize the mutex */
-	SpinLockInit(&pstate->mutex);
-	pstate->state = BM_INITIAL;
+	pg_atomic_init_u32(&pstate->state, BM_INITIAL);
 
 	ConditionVariableInit(&pstate->cv);
 
@@ -565,7 +556,7 @@ ExecBitmapHeapReInitializeDSM(BitmapHeapScanState *node,
 	if (dsa == NULL)
 		return;
 
-	pstate->state = BM_INITIAL;
+	pg_atomic_write_u32(&pstate->state, BM_INITIAL);
 
 	if (DsaPointerIsValid(pstate->tbmiterator))
 		tbm_free_shared_area(dsa, pstate->tbmiterator);
-- 
2.50.1 (Apple Git-155)


--Xf36GNcW+0xZNily
Content-Type: text/plain; charset=us-ascii
Content-Disposition: attachment;
	filename=v2-0003-convert-FixedParallelState-last_xlog_end-to-an-at.patch



^ permalink  raw  reply  [nested|flat] 440+ messages in thread

* [PATCH v2 2/9] convert ParallelBitmapHeapState->state to an atomic
@ 2026-07-09 18:38 Nathan Bossart <nathan@postgresql.org>
  0 siblings, 0 replies; 440+ messages in thread

From: Nathan Bossart @ 2026-07-09 18:38 UTC (permalink / raw)

---
 src/backend/executor/nodeBitmapHeapscan.c | 23 +++++++----------------
 1 file changed, 7 insertions(+), 16 deletions(-)

diff --git a/src/backend/executor/nodeBitmapHeapscan.c b/src/backend/executor/nodeBitmapHeapscan.c
index 83d6478bc2b..a9e83f30687 100644
--- a/src/backend/executor/nodeBitmapHeapscan.c
+++ b/src/backend/executor/nodeBitmapHeapscan.c
@@ -79,7 +79,6 @@ typedef enum
 /* ----------------
  *	 ParallelBitmapHeapState information
  *		tbmiterator				iterator for scanning current pages
- *		mutex					mutual exclusion for state
  *		state					current state of the TIDBitmap
  *		cv						conditional wait variable
  * ----------------
@@ -87,8 +86,7 @@ typedef enum
 typedef struct ParallelBitmapHeapState
 {
 	dsa_pointer tbmiterator;
-	slock_t		mutex;
-	SharedBitmapState state;
+	pg_atomic_uint32 state;
 	ConditionVariable cv;
 } ParallelBitmapHeapState;
 
@@ -228,9 +226,7 @@ BitmapHeapNext(BitmapHeapScanState *node)
 static inline void
 BitmapDoneInitializingSharedState(ParallelBitmapHeapState *pstate)
 {
-	SpinLockAcquire(&pstate->mutex);
-	pstate->state = BM_FINISHED;
-	SpinLockRelease(&pstate->mutex);
+	pg_atomic_write_membarrier_u32(&pstate->state, BM_FINISHED);
 	ConditionVariableBroadcast(&pstate->cv);
 }
 
@@ -476,15 +472,12 @@ ExecInitBitmapHeapScan(BitmapHeapScan *node, EState *estate, int eflags)
 static bool
 BitmapShouldInitializeSharedState(ParallelBitmapHeapState *pstate)
 {
-	SharedBitmapState state;
+	uint32		state;
 
 	while (1)
 	{
-		SpinLockAcquire(&pstate->mutex);
-		state = pstate->state;
-		if (pstate->state == BM_INITIAL)
-			pstate->state = BM_INPROGRESS;
-		SpinLockRelease(&pstate->mutex);
+		state = BM_INITIAL;
+		pg_atomic_compare_exchange_u32(&pstate->state, &state, BM_INPROGRESS);
 
 		/* Exit if bitmap is done, or if we're the leader. */
 		if (state != BM_INPROGRESS)
@@ -538,9 +531,7 @@ ExecBitmapHeapInitializeDSM(BitmapHeapScanState *node,
 
 	pstate->tbmiterator = 0;
 
-	/* Initialize the mutex */
-	SpinLockInit(&pstate->mutex);
-	pstate->state = BM_INITIAL;
+	pg_atomic_init_u32(&pstate->state, BM_INITIAL);
 
 	ConditionVariableInit(&pstate->cv);
 
@@ -565,7 +556,7 @@ ExecBitmapHeapReInitializeDSM(BitmapHeapScanState *node,
 	if (dsa == NULL)
 		return;
 
-	pstate->state = BM_INITIAL;
+	pg_atomic_write_u32(&pstate->state, BM_INITIAL);
 
 	if (DsaPointerIsValid(pstate->tbmiterator))
 		tbm_free_shared_area(dsa, pstate->tbmiterator);
-- 
2.50.1 (Apple Git-155)


--Xf36GNcW+0xZNily
Content-Type: text/plain; charset=us-ascii
Content-Disposition: attachment;
	filename=v2-0003-convert-FixedParallelState-last_xlog_end-to-an-at.patch



^ permalink  raw  reply  [nested|flat] 440+ messages in thread

* [PATCH v1 2/8] convert ParallelBitmapHeapState->state to an atomic
@ 2026-07-09 18:38 Nathan Bossart <nathan@postgresql.org>
  0 siblings, 0 replies; 440+ messages in thread

From: Nathan Bossart @ 2026-07-09 18:38 UTC (permalink / raw)

---
 src/backend/executor/nodeBitmapHeapscan.c | 21 ++++++---------------
 1 file changed, 6 insertions(+), 15 deletions(-)

diff --git a/src/backend/executor/nodeBitmapHeapscan.c b/src/backend/executor/nodeBitmapHeapscan.c
index 83d6478bc2b..f2bb487bf10 100644
--- a/src/backend/executor/nodeBitmapHeapscan.c
+++ b/src/backend/executor/nodeBitmapHeapscan.c
@@ -79,7 +79,6 @@ typedef enum
 /* ----------------
  *	 ParallelBitmapHeapState information
  *		tbmiterator				iterator for scanning current pages
- *		mutex					mutual exclusion for state
  *		state					current state of the TIDBitmap
  *		cv						conditional wait variable
  * ----------------
@@ -87,8 +86,7 @@ typedef enum
 typedef struct ParallelBitmapHeapState
 {
 	dsa_pointer tbmiterator;
-	slock_t		mutex;
-	SharedBitmapState state;
+	pg_atomic_uint32 state;
 	ConditionVariable cv;
 } ParallelBitmapHeapState;
 
@@ -228,9 +226,7 @@ BitmapHeapNext(BitmapHeapScanState *node)
 static inline void
 BitmapDoneInitializingSharedState(ParallelBitmapHeapState *pstate)
 {
-	SpinLockAcquire(&pstate->mutex);
-	pstate->state = BM_FINISHED;
-	SpinLockRelease(&pstate->mutex);
+	pg_atomic_write_membarrier_u32(&pstate->state, BM_FINISHED);
 	ConditionVariableBroadcast(&pstate->cv);
 }
 
@@ -480,11 +476,8 @@ BitmapShouldInitializeSharedState(ParallelBitmapHeapState *pstate)
 
 	while (1)
 	{
-		SpinLockAcquire(&pstate->mutex);
-		state = pstate->state;
-		if (pstate->state == BM_INITIAL)
-			pstate->state = BM_INPROGRESS;
-		SpinLockRelease(&pstate->mutex);
+		state = BM_INITIAL;
+		pg_atomic_compare_exchange_u32(&pstate->state, &state, BM_INPROGRESS);
 
 		/* Exit if bitmap is done, or if we're the leader. */
 		if (state != BM_INPROGRESS)
@@ -538,9 +531,7 @@ ExecBitmapHeapInitializeDSM(BitmapHeapScanState *node,
 
 	pstate->tbmiterator = 0;
 
-	/* Initialize the mutex */
-	SpinLockInit(&pstate->mutex);
-	pstate->state = BM_INITIAL;
+	pg_atomic_init_u32(&pstate->state, BM_INITIAL);
 
 	ConditionVariableInit(&pstate->cv);
 
@@ -565,7 +556,7 @@ ExecBitmapHeapReInitializeDSM(BitmapHeapScanState *node,
 	if (dsa == NULL)
 		return;
 
-	pstate->state = BM_INITIAL;
+	pg_atomic_write_u32(&pstate->state, BM_INITIAL);
 
 	if (DsaPointerIsValid(pstate->tbmiterator))
 		tbm_free_shared_area(dsa, pstate->tbmiterator);
-- 
2.50.1 (Apple Git-155)


--Ot5x3ffkWEuxilWO
Content-Type: text/plain; charset=us-ascii
Content-Disposition: attachment;
	filename=v1-0003-convert-FixedParallelState-last_xlog_end-to-an-at.patch



^ permalink  raw  reply  [nested|flat] 440+ messages in thread

* [PATCH v1 2/8] convert ParallelBitmapHeapState->state to an atomic
@ 2026-07-09 18:38 Nathan Bossart <nathan@postgresql.org>
  0 siblings, 0 replies; 440+ messages in thread

From: Nathan Bossart @ 2026-07-09 18:38 UTC (permalink / raw)

---
 src/backend/executor/nodeBitmapHeapscan.c | 21 ++++++---------------
 1 file changed, 6 insertions(+), 15 deletions(-)

diff --git a/src/backend/executor/nodeBitmapHeapscan.c b/src/backend/executor/nodeBitmapHeapscan.c
index 83d6478bc2b..f2bb487bf10 100644
--- a/src/backend/executor/nodeBitmapHeapscan.c
+++ b/src/backend/executor/nodeBitmapHeapscan.c
@@ -79,7 +79,6 @@ typedef enum
 /* ----------------
  *	 ParallelBitmapHeapState information
  *		tbmiterator				iterator for scanning current pages
- *		mutex					mutual exclusion for state
  *		state					current state of the TIDBitmap
  *		cv						conditional wait variable
  * ----------------
@@ -87,8 +86,7 @@ typedef enum
 typedef struct ParallelBitmapHeapState
 {
 	dsa_pointer tbmiterator;
-	slock_t		mutex;
-	SharedBitmapState state;
+	pg_atomic_uint32 state;
 	ConditionVariable cv;
 } ParallelBitmapHeapState;
 
@@ -228,9 +226,7 @@ BitmapHeapNext(BitmapHeapScanState *node)
 static inline void
 BitmapDoneInitializingSharedState(ParallelBitmapHeapState *pstate)
 {
-	SpinLockAcquire(&pstate->mutex);
-	pstate->state = BM_FINISHED;
-	SpinLockRelease(&pstate->mutex);
+	pg_atomic_write_membarrier_u32(&pstate->state, BM_FINISHED);
 	ConditionVariableBroadcast(&pstate->cv);
 }
 
@@ -480,11 +476,8 @@ BitmapShouldInitializeSharedState(ParallelBitmapHeapState *pstate)
 
 	while (1)
 	{
-		SpinLockAcquire(&pstate->mutex);
-		state = pstate->state;
-		if (pstate->state == BM_INITIAL)
-			pstate->state = BM_INPROGRESS;
-		SpinLockRelease(&pstate->mutex);
+		state = BM_INITIAL;
+		pg_atomic_compare_exchange_u32(&pstate->state, &state, BM_INPROGRESS);
 
 		/* Exit if bitmap is done, or if we're the leader. */
 		if (state != BM_INPROGRESS)
@@ -538,9 +531,7 @@ ExecBitmapHeapInitializeDSM(BitmapHeapScanState *node,
 
 	pstate->tbmiterator = 0;
 
-	/* Initialize the mutex */
-	SpinLockInit(&pstate->mutex);
-	pstate->state = BM_INITIAL;
+	pg_atomic_init_u32(&pstate->state, BM_INITIAL);
 
 	ConditionVariableInit(&pstate->cv);
 
@@ -565,7 +556,7 @@ ExecBitmapHeapReInitializeDSM(BitmapHeapScanState *node,
 	if (dsa == NULL)
 		return;
 
-	pstate->state = BM_INITIAL;
+	pg_atomic_write_u32(&pstate->state, BM_INITIAL);
 
 	if (DsaPointerIsValid(pstate->tbmiterator))
 		tbm_free_shared_area(dsa, pstate->tbmiterator);
-- 
2.50.1 (Apple Git-155)


--Ot5x3ffkWEuxilWO
Content-Type: text/plain; charset=us-ascii
Content-Disposition: attachment;
	filename=v1-0003-convert-FixedParallelState-last_xlog_end-to-an-at.patch



^ permalink  raw  reply  [nested|flat] 440+ messages in thread

* [PATCH v1 2/8] convert ParallelBitmapHeapState->state to an atomic
@ 2026-07-09 18:38 Nathan Bossart <nathan@postgresql.org>
  0 siblings, 0 replies; 440+ messages in thread

From: Nathan Bossart @ 2026-07-09 18:38 UTC (permalink / raw)

---
 src/backend/executor/nodeBitmapHeapscan.c | 21 ++++++---------------
 1 file changed, 6 insertions(+), 15 deletions(-)

diff --git a/src/backend/executor/nodeBitmapHeapscan.c b/src/backend/executor/nodeBitmapHeapscan.c
index 83d6478bc2b..f2bb487bf10 100644
--- a/src/backend/executor/nodeBitmapHeapscan.c
+++ b/src/backend/executor/nodeBitmapHeapscan.c
@@ -79,7 +79,6 @@ typedef enum
 /* ----------------
  *	 ParallelBitmapHeapState information
  *		tbmiterator				iterator for scanning current pages
- *		mutex					mutual exclusion for state
  *		state					current state of the TIDBitmap
  *		cv						conditional wait variable
  * ----------------
@@ -87,8 +86,7 @@ typedef enum
 typedef struct ParallelBitmapHeapState
 {
 	dsa_pointer tbmiterator;
-	slock_t		mutex;
-	SharedBitmapState state;
+	pg_atomic_uint32 state;
 	ConditionVariable cv;
 } ParallelBitmapHeapState;
 
@@ -228,9 +226,7 @@ BitmapHeapNext(BitmapHeapScanState *node)
 static inline void
 BitmapDoneInitializingSharedState(ParallelBitmapHeapState *pstate)
 {
-	SpinLockAcquire(&pstate->mutex);
-	pstate->state = BM_FINISHED;
-	SpinLockRelease(&pstate->mutex);
+	pg_atomic_write_membarrier_u32(&pstate->state, BM_FINISHED);
 	ConditionVariableBroadcast(&pstate->cv);
 }
 
@@ -480,11 +476,8 @@ BitmapShouldInitializeSharedState(ParallelBitmapHeapState *pstate)
 
 	while (1)
 	{
-		SpinLockAcquire(&pstate->mutex);
-		state = pstate->state;
-		if (pstate->state == BM_INITIAL)
-			pstate->state = BM_INPROGRESS;
-		SpinLockRelease(&pstate->mutex);
+		state = BM_INITIAL;
+		pg_atomic_compare_exchange_u32(&pstate->state, &state, BM_INPROGRESS);
 
 		/* Exit if bitmap is done, or if we're the leader. */
 		if (state != BM_INPROGRESS)
@@ -538,9 +531,7 @@ ExecBitmapHeapInitializeDSM(BitmapHeapScanState *node,
 
 	pstate->tbmiterator = 0;
 
-	/* Initialize the mutex */
-	SpinLockInit(&pstate->mutex);
-	pstate->state = BM_INITIAL;
+	pg_atomic_init_u32(&pstate->state, BM_INITIAL);
 
 	ConditionVariableInit(&pstate->cv);
 
@@ -565,7 +556,7 @@ ExecBitmapHeapReInitializeDSM(BitmapHeapScanState *node,
 	if (dsa == NULL)
 		return;
 
-	pstate->state = BM_INITIAL;
+	pg_atomic_write_u32(&pstate->state, BM_INITIAL);
 
 	if (DsaPointerIsValid(pstate->tbmiterator))
 		tbm_free_shared_area(dsa, pstate->tbmiterator);
-- 
2.50.1 (Apple Git-155)


--Ot5x3ffkWEuxilWO
Content-Type: text/plain; charset=us-ascii
Content-Disposition: attachment;
	filename=v1-0003-convert-FixedParallelState-last_xlog_end-to-an-at.patch



^ permalink  raw  reply  [nested|flat] 440+ messages in thread

* [PATCH v2 2/9] convert ParallelBitmapHeapState->state to an atomic
@ 2026-07-09 18:38 Nathan Bossart <nathan@postgresql.org>
  0 siblings, 0 replies; 440+ messages in thread

From: Nathan Bossart @ 2026-07-09 18:38 UTC (permalink / raw)

---
 src/backend/executor/nodeBitmapHeapscan.c | 23 +++++++----------------
 1 file changed, 7 insertions(+), 16 deletions(-)

diff --git a/src/backend/executor/nodeBitmapHeapscan.c b/src/backend/executor/nodeBitmapHeapscan.c
index 83d6478bc2b..a9e83f30687 100644
--- a/src/backend/executor/nodeBitmapHeapscan.c
+++ b/src/backend/executor/nodeBitmapHeapscan.c
@@ -79,7 +79,6 @@ typedef enum
 /* ----------------
  *	 ParallelBitmapHeapState information
  *		tbmiterator				iterator for scanning current pages
- *		mutex					mutual exclusion for state
  *		state					current state of the TIDBitmap
  *		cv						conditional wait variable
  * ----------------
@@ -87,8 +86,7 @@ typedef enum
 typedef struct ParallelBitmapHeapState
 {
 	dsa_pointer tbmiterator;
-	slock_t		mutex;
-	SharedBitmapState state;
+	pg_atomic_uint32 state;
 	ConditionVariable cv;
 } ParallelBitmapHeapState;
 
@@ -228,9 +226,7 @@ BitmapHeapNext(BitmapHeapScanState *node)
 static inline void
 BitmapDoneInitializingSharedState(ParallelBitmapHeapState *pstate)
 {
-	SpinLockAcquire(&pstate->mutex);
-	pstate->state = BM_FINISHED;
-	SpinLockRelease(&pstate->mutex);
+	pg_atomic_write_membarrier_u32(&pstate->state, BM_FINISHED);
 	ConditionVariableBroadcast(&pstate->cv);
 }
 
@@ -476,15 +472,12 @@ ExecInitBitmapHeapScan(BitmapHeapScan *node, EState *estate, int eflags)
 static bool
 BitmapShouldInitializeSharedState(ParallelBitmapHeapState *pstate)
 {
-	SharedBitmapState state;
+	uint32		state;
 
 	while (1)
 	{
-		SpinLockAcquire(&pstate->mutex);
-		state = pstate->state;
-		if (pstate->state == BM_INITIAL)
-			pstate->state = BM_INPROGRESS;
-		SpinLockRelease(&pstate->mutex);
+		state = BM_INITIAL;
+		pg_atomic_compare_exchange_u32(&pstate->state, &state, BM_INPROGRESS);
 
 		/* Exit if bitmap is done, or if we're the leader. */
 		if (state != BM_INPROGRESS)
@@ -538,9 +531,7 @@ ExecBitmapHeapInitializeDSM(BitmapHeapScanState *node,
 
 	pstate->tbmiterator = 0;
 
-	/* Initialize the mutex */
-	SpinLockInit(&pstate->mutex);
-	pstate->state = BM_INITIAL;
+	pg_atomic_init_u32(&pstate->state, BM_INITIAL);
 
 	ConditionVariableInit(&pstate->cv);
 
@@ -565,7 +556,7 @@ ExecBitmapHeapReInitializeDSM(BitmapHeapScanState *node,
 	if (dsa == NULL)
 		return;
 
-	pstate->state = BM_INITIAL;
+	pg_atomic_write_u32(&pstate->state, BM_INITIAL);
 
 	if (DsaPointerIsValid(pstate->tbmiterator))
 		tbm_free_shared_area(dsa, pstate->tbmiterator);
-- 
2.50.1 (Apple Git-155)


--Xf36GNcW+0xZNily
Content-Type: text/plain; charset=us-ascii
Content-Disposition: attachment;
	filename=v2-0003-convert-FixedParallelState-last_xlog_end-to-an-at.patch



^ permalink  raw  reply  [nested|flat] 440+ messages in thread

* [PATCH v2 2/9] convert ParallelBitmapHeapState->state to an atomic
@ 2026-07-09 18:38 Nathan Bossart <nathan@postgresql.org>
  0 siblings, 0 replies; 440+ messages in thread

From: Nathan Bossart @ 2026-07-09 18:38 UTC (permalink / raw)

---
 src/backend/executor/nodeBitmapHeapscan.c | 23 +++++++----------------
 1 file changed, 7 insertions(+), 16 deletions(-)

diff --git a/src/backend/executor/nodeBitmapHeapscan.c b/src/backend/executor/nodeBitmapHeapscan.c
index 83d6478bc2b..a9e83f30687 100644
--- a/src/backend/executor/nodeBitmapHeapscan.c
+++ b/src/backend/executor/nodeBitmapHeapscan.c
@@ -79,7 +79,6 @@ typedef enum
 /* ----------------
  *	 ParallelBitmapHeapState information
  *		tbmiterator				iterator for scanning current pages
- *		mutex					mutual exclusion for state
  *		state					current state of the TIDBitmap
  *		cv						conditional wait variable
  * ----------------
@@ -87,8 +86,7 @@ typedef enum
 typedef struct ParallelBitmapHeapState
 {
 	dsa_pointer tbmiterator;
-	slock_t		mutex;
-	SharedBitmapState state;
+	pg_atomic_uint32 state;
 	ConditionVariable cv;
 } ParallelBitmapHeapState;
 
@@ -228,9 +226,7 @@ BitmapHeapNext(BitmapHeapScanState *node)
 static inline void
 BitmapDoneInitializingSharedState(ParallelBitmapHeapState *pstate)
 {
-	SpinLockAcquire(&pstate->mutex);
-	pstate->state = BM_FINISHED;
-	SpinLockRelease(&pstate->mutex);
+	pg_atomic_write_membarrier_u32(&pstate->state, BM_FINISHED);
 	ConditionVariableBroadcast(&pstate->cv);
 }
 
@@ -476,15 +472,12 @@ ExecInitBitmapHeapScan(BitmapHeapScan *node, EState *estate, int eflags)
 static bool
 BitmapShouldInitializeSharedState(ParallelBitmapHeapState *pstate)
 {
-	SharedBitmapState state;
+	uint32		state;
 
 	while (1)
 	{
-		SpinLockAcquire(&pstate->mutex);
-		state = pstate->state;
-		if (pstate->state == BM_INITIAL)
-			pstate->state = BM_INPROGRESS;
-		SpinLockRelease(&pstate->mutex);
+		state = BM_INITIAL;
+		pg_atomic_compare_exchange_u32(&pstate->state, &state, BM_INPROGRESS);
 
 		/* Exit if bitmap is done, or if we're the leader. */
 		if (state != BM_INPROGRESS)
@@ -538,9 +531,7 @@ ExecBitmapHeapInitializeDSM(BitmapHeapScanState *node,
 
 	pstate->tbmiterator = 0;
 
-	/* Initialize the mutex */
-	SpinLockInit(&pstate->mutex);
-	pstate->state = BM_INITIAL;
+	pg_atomic_init_u32(&pstate->state, BM_INITIAL);
 
 	ConditionVariableInit(&pstate->cv);
 
@@ -565,7 +556,7 @@ ExecBitmapHeapReInitializeDSM(BitmapHeapScanState *node,
 	if (dsa == NULL)
 		return;
 
-	pstate->state = BM_INITIAL;
+	pg_atomic_write_u32(&pstate->state, BM_INITIAL);
 
 	if (DsaPointerIsValid(pstate->tbmiterator))
 		tbm_free_shared_area(dsa, pstate->tbmiterator);
-- 
2.50.1 (Apple Git-155)


--Xf36GNcW+0xZNily
Content-Type: text/plain; charset=us-ascii
Content-Disposition: attachment;
	filename=v2-0003-convert-FixedParallelState-last_xlog_end-to-an-at.patch



^ permalink  raw  reply  [nested|flat] 440+ messages in thread

* [PATCH v1 2/8] convert ParallelBitmapHeapState->state to an atomic
@ 2026-07-09 18:38 Nathan Bossart <nathan@postgresql.org>
  0 siblings, 0 replies; 440+ messages in thread

From: Nathan Bossart @ 2026-07-09 18:38 UTC (permalink / raw)

---
 src/backend/executor/nodeBitmapHeapscan.c | 21 ++++++---------------
 1 file changed, 6 insertions(+), 15 deletions(-)

diff --git a/src/backend/executor/nodeBitmapHeapscan.c b/src/backend/executor/nodeBitmapHeapscan.c
index 83d6478bc2b..f2bb487bf10 100644
--- a/src/backend/executor/nodeBitmapHeapscan.c
+++ b/src/backend/executor/nodeBitmapHeapscan.c
@@ -79,7 +79,6 @@ typedef enum
 /* ----------------
  *	 ParallelBitmapHeapState information
  *		tbmiterator				iterator for scanning current pages
- *		mutex					mutual exclusion for state
  *		state					current state of the TIDBitmap
  *		cv						conditional wait variable
  * ----------------
@@ -87,8 +86,7 @@ typedef enum
 typedef struct ParallelBitmapHeapState
 {
 	dsa_pointer tbmiterator;
-	slock_t		mutex;
-	SharedBitmapState state;
+	pg_atomic_uint32 state;
 	ConditionVariable cv;
 } ParallelBitmapHeapState;
 
@@ -228,9 +226,7 @@ BitmapHeapNext(BitmapHeapScanState *node)
 static inline void
 BitmapDoneInitializingSharedState(ParallelBitmapHeapState *pstate)
 {
-	SpinLockAcquire(&pstate->mutex);
-	pstate->state = BM_FINISHED;
-	SpinLockRelease(&pstate->mutex);
+	pg_atomic_write_membarrier_u32(&pstate->state, BM_FINISHED);
 	ConditionVariableBroadcast(&pstate->cv);
 }
 
@@ -480,11 +476,8 @@ BitmapShouldInitializeSharedState(ParallelBitmapHeapState *pstate)
 
 	while (1)
 	{
-		SpinLockAcquire(&pstate->mutex);
-		state = pstate->state;
-		if (pstate->state == BM_INITIAL)
-			pstate->state = BM_INPROGRESS;
-		SpinLockRelease(&pstate->mutex);
+		state = BM_INITIAL;
+		pg_atomic_compare_exchange_u32(&pstate->state, &state, BM_INPROGRESS);
 
 		/* Exit if bitmap is done, or if we're the leader. */
 		if (state != BM_INPROGRESS)
@@ -538,9 +531,7 @@ ExecBitmapHeapInitializeDSM(BitmapHeapScanState *node,
 
 	pstate->tbmiterator = 0;
 
-	/* Initialize the mutex */
-	SpinLockInit(&pstate->mutex);
-	pstate->state = BM_INITIAL;
+	pg_atomic_init_u32(&pstate->state, BM_INITIAL);
 
 	ConditionVariableInit(&pstate->cv);
 
@@ -565,7 +556,7 @@ ExecBitmapHeapReInitializeDSM(BitmapHeapScanState *node,
 	if (dsa == NULL)
 		return;
 
-	pstate->state = BM_INITIAL;
+	pg_atomic_write_u32(&pstate->state, BM_INITIAL);
 
 	if (DsaPointerIsValid(pstate->tbmiterator))
 		tbm_free_shared_area(dsa, pstate->tbmiterator);
-- 
2.50.1 (Apple Git-155)


--Ot5x3ffkWEuxilWO
Content-Type: text/plain; charset=us-ascii
Content-Disposition: attachment;
	filename=v1-0003-convert-FixedParallelState-last_xlog_end-to-an-at.patch



^ permalink  raw  reply  [nested|flat] 440+ messages in thread

* [PATCH v1 2/8] convert ParallelBitmapHeapState->state to an atomic
@ 2026-07-09 18:38 Nathan Bossart <nathan@postgresql.org>
  0 siblings, 0 replies; 440+ messages in thread

From: Nathan Bossart @ 2026-07-09 18:38 UTC (permalink / raw)

---
 src/backend/executor/nodeBitmapHeapscan.c | 21 ++++++---------------
 1 file changed, 6 insertions(+), 15 deletions(-)

diff --git a/src/backend/executor/nodeBitmapHeapscan.c b/src/backend/executor/nodeBitmapHeapscan.c
index 83d6478bc2b..f2bb487bf10 100644
--- a/src/backend/executor/nodeBitmapHeapscan.c
+++ b/src/backend/executor/nodeBitmapHeapscan.c
@@ -79,7 +79,6 @@ typedef enum
 /* ----------------
  *	 ParallelBitmapHeapState information
  *		tbmiterator				iterator for scanning current pages
- *		mutex					mutual exclusion for state
  *		state					current state of the TIDBitmap
  *		cv						conditional wait variable
  * ----------------
@@ -87,8 +86,7 @@ typedef enum
 typedef struct ParallelBitmapHeapState
 {
 	dsa_pointer tbmiterator;
-	slock_t		mutex;
-	SharedBitmapState state;
+	pg_atomic_uint32 state;
 	ConditionVariable cv;
 } ParallelBitmapHeapState;
 
@@ -228,9 +226,7 @@ BitmapHeapNext(BitmapHeapScanState *node)
 static inline void
 BitmapDoneInitializingSharedState(ParallelBitmapHeapState *pstate)
 {
-	SpinLockAcquire(&pstate->mutex);
-	pstate->state = BM_FINISHED;
-	SpinLockRelease(&pstate->mutex);
+	pg_atomic_write_membarrier_u32(&pstate->state, BM_FINISHED);
 	ConditionVariableBroadcast(&pstate->cv);
 }
 
@@ -480,11 +476,8 @@ BitmapShouldInitializeSharedState(ParallelBitmapHeapState *pstate)
 
 	while (1)
 	{
-		SpinLockAcquire(&pstate->mutex);
-		state = pstate->state;
-		if (pstate->state == BM_INITIAL)
-			pstate->state = BM_INPROGRESS;
-		SpinLockRelease(&pstate->mutex);
+		state = BM_INITIAL;
+		pg_atomic_compare_exchange_u32(&pstate->state, &state, BM_INPROGRESS);
 
 		/* Exit if bitmap is done, or if we're the leader. */
 		if (state != BM_INPROGRESS)
@@ -538,9 +531,7 @@ ExecBitmapHeapInitializeDSM(BitmapHeapScanState *node,
 
 	pstate->tbmiterator = 0;
 
-	/* Initialize the mutex */
-	SpinLockInit(&pstate->mutex);
-	pstate->state = BM_INITIAL;
+	pg_atomic_init_u32(&pstate->state, BM_INITIAL);
 
 	ConditionVariableInit(&pstate->cv);
 
@@ -565,7 +556,7 @@ ExecBitmapHeapReInitializeDSM(BitmapHeapScanState *node,
 	if (dsa == NULL)
 		return;
 
-	pstate->state = BM_INITIAL;
+	pg_atomic_write_u32(&pstate->state, BM_INITIAL);
 
 	if (DsaPointerIsValid(pstate->tbmiterator))
 		tbm_free_shared_area(dsa, pstate->tbmiterator);
-- 
2.50.1 (Apple Git-155)


--Ot5x3ffkWEuxilWO
Content-Type: text/plain; charset=us-ascii
Content-Disposition: attachment;
	filename=v1-0003-convert-FixedParallelState-last_xlog_end-to-an-at.patch



^ permalink  raw  reply  [nested|flat] 440+ messages in thread

* [PATCH v1 2/8] convert ParallelBitmapHeapState->state to an atomic
@ 2026-07-09 18:38 Nathan Bossart <nathan@postgresql.org>
  0 siblings, 0 replies; 440+ messages in thread

From: Nathan Bossart @ 2026-07-09 18:38 UTC (permalink / raw)

---
 src/backend/executor/nodeBitmapHeapscan.c | 21 ++++++---------------
 1 file changed, 6 insertions(+), 15 deletions(-)

diff --git a/src/backend/executor/nodeBitmapHeapscan.c b/src/backend/executor/nodeBitmapHeapscan.c
index 83d6478bc2b..f2bb487bf10 100644
--- a/src/backend/executor/nodeBitmapHeapscan.c
+++ b/src/backend/executor/nodeBitmapHeapscan.c
@@ -79,7 +79,6 @@ typedef enum
 /* ----------------
  *	 ParallelBitmapHeapState information
  *		tbmiterator				iterator for scanning current pages
- *		mutex					mutual exclusion for state
  *		state					current state of the TIDBitmap
  *		cv						conditional wait variable
  * ----------------
@@ -87,8 +86,7 @@ typedef enum
 typedef struct ParallelBitmapHeapState
 {
 	dsa_pointer tbmiterator;
-	slock_t		mutex;
-	SharedBitmapState state;
+	pg_atomic_uint32 state;
 	ConditionVariable cv;
 } ParallelBitmapHeapState;
 
@@ -228,9 +226,7 @@ BitmapHeapNext(BitmapHeapScanState *node)
 static inline void
 BitmapDoneInitializingSharedState(ParallelBitmapHeapState *pstate)
 {
-	SpinLockAcquire(&pstate->mutex);
-	pstate->state = BM_FINISHED;
-	SpinLockRelease(&pstate->mutex);
+	pg_atomic_write_membarrier_u32(&pstate->state, BM_FINISHED);
 	ConditionVariableBroadcast(&pstate->cv);
 }
 
@@ -480,11 +476,8 @@ BitmapShouldInitializeSharedState(ParallelBitmapHeapState *pstate)
 
 	while (1)
 	{
-		SpinLockAcquire(&pstate->mutex);
-		state = pstate->state;
-		if (pstate->state == BM_INITIAL)
-			pstate->state = BM_INPROGRESS;
-		SpinLockRelease(&pstate->mutex);
+		state = BM_INITIAL;
+		pg_atomic_compare_exchange_u32(&pstate->state, &state, BM_INPROGRESS);
 
 		/* Exit if bitmap is done, or if we're the leader. */
 		if (state != BM_INPROGRESS)
@@ -538,9 +531,7 @@ ExecBitmapHeapInitializeDSM(BitmapHeapScanState *node,
 
 	pstate->tbmiterator = 0;
 
-	/* Initialize the mutex */
-	SpinLockInit(&pstate->mutex);
-	pstate->state = BM_INITIAL;
+	pg_atomic_init_u32(&pstate->state, BM_INITIAL);
 
 	ConditionVariableInit(&pstate->cv);
 
@@ -565,7 +556,7 @@ ExecBitmapHeapReInitializeDSM(BitmapHeapScanState *node,
 	if (dsa == NULL)
 		return;
 
-	pstate->state = BM_INITIAL;
+	pg_atomic_write_u32(&pstate->state, BM_INITIAL);
 
 	if (DsaPointerIsValid(pstate->tbmiterator))
 		tbm_free_shared_area(dsa, pstate->tbmiterator);
-- 
2.50.1 (Apple Git-155)


--Ot5x3ffkWEuxilWO
Content-Type: text/plain; charset=us-ascii
Content-Disposition: attachment;
	filename=v1-0003-convert-FixedParallelState-last_xlog_end-to-an-at.patch



^ permalink  raw  reply  [nested|flat] 440+ messages in thread

* [PATCH v2 2/9] convert ParallelBitmapHeapState->state to an atomic
@ 2026-07-09 18:38 Nathan Bossart <nathan@postgresql.org>
  0 siblings, 0 replies; 440+ messages in thread

From: Nathan Bossart @ 2026-07-09 18:38 UTC (permalink / raw)

---
 src/backend/executor/nodeBitmapHeapscan.c | 23 +++++++----------------
 1 file changed, 7 insertions(+), 16 deletions(-)

diff --git a/src/backend/executor/nodeBitmapHeapscan.c b/src/backend/executor/nodeBitmapHeapscan.c
index 83d6478bc2b..a9e83f30687 100644
--- a/src/backend/executor/nodeBitmapHeapscan.c
+++ b/src/backend/executor/nodeBitmapHeapscan.c
@@ -79,7 +79,6 @@ typedef enum
 /* ----------------
  *	 ParallelBitmapHeapState information
  *		tbmiterator				iterator for scanning current pages
- *		mutex					mutual exclusion for state
  *		state					current state of the TIDBitmap
  *		cv						conditional wait variable
  * ----------------
@@ -87,8 +86,7 @@ typedef enum
 typedef struct ParallelBitmapHeapState
 {
 	dsa_pointer tbmiterator;
-	slock_t		mutex;
-	SharedBitmapState state;
+	pg_atomic_uint32 state;
 	ConditionVariable cv;
 } ParallelBitmapHeapState;
 
@@ -228,9 +226,7 @@ BitmapHeapNext(BitmapHeapScanState *node)
 static inline void
 BitmapDoneInitializingSharedState(ParallelBitmapHeapState *pstate)
 {
-	SpinLockAcquire(&pstate->mutex);
-	pstate->state = BM_FINISHED;
-	SpinLockRelease(&pstate->mutex);
+	pg_atomic_write_membarrier_u32(&pstate->state, BM_FINISHED);
 	ConditionVariableBroadcast(&pstate->cv);
 }
 
@@ -476,15 +472,12 @@ ExecInitBitmapHeapScan(BitmapHeapScan *node, EState *estate, int eflags)
 static bool
 BitmapShouldInitializeSharedState(ParallelBitmapHeapState *pstate)
 {
-	SharedBitmapState state;
+	uint32		state;
 
 	while (1)
 	{
-		SpinLockAcquire(&pstate->mutex);
-		state = pstate->state;
-		if (pstate->state == BM_INITIAL)
-			pstate->state = BM_INPROGRESS;
-		SpinLockRelease(&pstate->mutex);
+		state = BM_INITIAL;
+		pg_atomic_compare_exchange_u32(&pstate->state, &state, BM_INPROGRESS);
 
 		/* Exit if bitmap is done, or if we're the leader. */
 		if (state != BM_INPROGRESS)
@@ -538,9 +531,7 @@ ExecBitmapHeapInitializeDSM(BitmapHeapScanState *node,
 
 	pstate->tbmiterator = 0;
 
-	/* Initialize the mutex */
-	SpinLockInit(&pstate->mutex);
-	pstate->state = BM_INITIAL;
+	pg_atomic_init_u32(&pstate->state, BM_INITIAL);
 
 	ConditionVariableInit(&pstate->cv);
 
@@ -565,7 +556,7 @@ ExecBitmapHeapReInitializeDSM(BitmapHeapScanState *node,
 	if (dsa == NULL)
 		return;
 
-	pstate->state = BM_INITIAL;
+	pg_atomic_write_u32(&pstate->state, BM_INITIAL);
 
 	if (DsaPointerIsValid(pstate->tbmiterator))
 		tbm_free_shared_area(dsa, pstate->tbmiterator);
-- 
2.50.1 (Apple Git-155)


--Xf36GNcW+0xZNily
Content-Type: text/plain; charset=us-ascii
Content-Disposition: attachment;
	filename=v2-0003-convert-FixedParallelState-last_xlog_end-to-an-at.patch



^ permalink  raw  reply  [nested|flat] 440+ messages in thread

* [PATCH v1 2/8] convert ParallelBitmapHeapState->state to an atomic
@ 2026-07-09 18:38 Nathan Bossart <nathan@postgresql.org>
  0 siblings, 0 replies; 440+ messages in thread

From: Nathan Bossart @ 2026-07-09 18:38 UTC (permalink / raw)

---
 src/backend/executor/nodeBitmapHeapscan.c | 21 ++++++---------------
 1 file changed, 6 insertions(+), 15 deletions(-)

diff --git a/src/backend/executor/nodeBitmapHeapscan.c b/src/backend/executor/nodeBitmapHeapscan.c
index 83d6478bc2b..f2bb487bf10 100644
--- a/src/backend/executor/nodeBitmapHeapscan.c
+++ b/src/backend/executor/nodeBitmapHeapscan.c
@@ -79,7 +79,6 @@ typedef enum
 /* ----------------
  *	 ParallelBitmapHeapState information
  *		tbmiterator				iterator for scanning current pages
- *		mutex					mutual exclusion for state
  *		state					current state of the TIDBitmap
  *		cv						conditional wait variable
  * ----------------
@@ -87,8 +86,7 @@ typedef enum
 typedef struct ParallelBitmapHeapState
 {
 	dsa_pointer tbmiterator;
-	slock_t		mutex;
-	SharedBitmapState state;
+	pg_atomic_uint32 state;
 	ConditionVariable cv;
 } ParallelBitmapHeapState;
 
@@ -228,9 +226,7 @@ BitmapHeapNext(BitmapHeapScanState *node)
 static inline void
 BitmapDoneInitializingSharedState(ParallelBitmapHeapState *pstate)
 {
-	SpinLockAcquire(&pstate->mutex);
-	pstate->state = BM_FINISHED;
-	SpinLockRelease(&pstate->mutex);
+	pg_atomic_write_membarrier_u32(&pstate->state, BM_FINISHED);
 	ConditionVariableBroadcast(&pstate->cv);
 }
 
@@ -480,11 +476,8 @@ BitmapShouldInitializeSharedState(ParallelBitmapHeapState *pstate)
 
 	while (1)
 	{
-		SpinLockAcquire(&pstate->mutex);
-		state = pstate->state;
-		if (pstate->state == BM_INITIAL)
-			pstate->state = BM_INPROGRESS;
-		SpinLockRelease(&pstate->mutex);
+		state = BM_INITIAL;
+		pg_atomic_compare_exchange_u32(&pstate->state, &state, BM_INPROGRESS);
 
 		/* Exit if bitmap is done, or if we're the leader. */
 		if (state != BM_INPROGRESS)
@@ -538,9 +531,7 @@ ExecBitmapHeapInitializeDSM(BitmapHeapScanState *node,
 
 	pstate->tbmiterator = 0;
 
-	/* Initialize the mutex */
-	SpinLockInit(&pstate->mutex);
-	pstate->state = BM_INITIAL;
+	pg_atomic_init_u32(&pstate->state, BM_INITIAL);
 
 	ConditionVariableInit(&pstate->cv);
 
@@ -565,7 +556,7 @@ ExecBitmapHeapReInitializeDSM(BitmapHeapScanState *node,
 	if (dsa == NULL)
 		return;
 
-	pstate->state = BM_INITIAL;
+	pg_atomic_write_u32(&pstate->state, BM_INITIAL);
 
 	if (DsaPointerIsValid(pstate->tbmiterator))
 		tbm_free_shared_area(dsa, pstate->tbmiterator);
-- 
2.50.1 (Apple Git-155)


--Ot5x3ffkWEuxilWO
Content-Type: text/plain; charset=us-ascii
Content-Disposition: attachment;
	filename=v1-0003-convert-FixedParallelState-last_xlog_end-to-an-at.patch



^ permalink  raw  reply  [nested|flat] 440+ messages in thread

* [PATCH v1 2/8] convert ParallelBitmapHeapState->state to an atomic
@ 2026-07-09 18:38 Nathan Bossart <nathan@postgresql.org>
  0 siblings, 0 replies; 440+ messages in thread

From: Nathan Bossart @ 2026-07-09 18:38 UTC (permalink / raw)

---
 src/backend/executor/nodeBitmapHeapscan.c | 21 ++++++---------------
 1 file changed, 6 insertions(+), 15 deletions(-)

diff --git a/src/backend/executor/nodeBitmapHeapscan.c b/src/backend/executor/nodeBitmapHeapscan.c
index 83d6478bc2b..f2bb487bf10 100644
--- a/src/backend/executor/nodeBitmapHeapscan.c
+++ b/src/backend/executor/nodeBitmapHeapscan.c
@@ -79,7 +79,6 @@ typedef enum
 /* ----------------
  *	 ParallelBitmapHeapState information
  *		tbmiterator				iterator for scanning current pages
- *		mutex					mutual exclusion for state
  *		state					current state of the TIDBitmap
  *		cv						conditional wait variable
  * ----------------
@@ -87,8 +86,7 @@ typedef enum
 typedef struct ParallelBitmapHeapState
 {
 	dsa_pointer tbmiterator;
-	slock_t		mutex;
-	SharedBitmapState state;
+	pg_atomic_uint32 state;
 	ConditionVariable cv;
 } ParallelBitmapHeapState;
 
@@ -228,9 +226,7 @@ BitmapHeapNext(BitmapHeapScanState *node)
 static inline void
 BitmapDoneInitializingSharedState(ParallelBitmapHeapState *pstate)
 {
-	SpinLockAcquire(&pstate->mutex);
-	pstate->state = BM_FINISHED;
-	SpinLockRelease(&pstate->mutex);
+	pg_atomic_write_membarrier_u32(&pstate->state, BM_FINISHED);
 	ConditionVariableBroadcast(&pstate->cv);
 }
 
@@ -480,11 +476,8 @@ BitmapShouldInitializeSharedState(ParallelBitmapHeapState *pstate)
 
 	while (1)
 	{
-		SpinLockAcquire(&pstate->mutex);
-		state = pstate->state;
-		if (pstate->state == BM_INITIAL)
-			pstate->state = BM_INPROGRESS;
-		SpinLockRelease(&pstate->mutex);
+		state = BM_INITIAL;
+		pg_atomic_compare_exchange_u32(&pstate->state, &state, BM_INPROGRESS);
 
 		/* Exit if bitmap is done, or if we're the leader. */
 		if (state != BM_INPROGRESS)
@@ -538,9 +531,7 @@ ExecBitmapHeapInitializeDSM(BitmapHeapScanState *node,
 
 	pstate->tbmiterator = 0;
 
-	/* Initialize the mutex */
-	SpinLockInit(&pstate->mutex);
-	pstate->state = BM_INITIAL;
+	pg_atomic_init_u32(&pstate->state, BM_INITIAL);
 
 	ConditionVariableInit(&pstate->cv);
 
@@ -565,7 +556,7 @@ ExecBitmapHeapReInitializeDSM(BitmapHeapScanState *node,
 	if (dsa == NULL)
 		return;
 
-	pstate->state = BM_INITIAL;
+	pg_atomic_write_u32(&pstate->state, BM_INITIAL);
 
 	if (DsaPointerIsValid(pstate->tbmiterator))
 		tbm_free_shared_area(dsa, pstate->tbmiterator);
-- 
2.50.1 (Apple Git-155)


--Ot5x3ffkWEuxilWO
Content-Type: text/plain; charset=us-ascii
Content-Disposition: attachment;
	filename=v1-0003-convert-FixedParallelState-last_xlog_end-to-an-at.patch



^ permalink  raw  reply  [nested|flat] 440+ messages in thread

* [PATCH v2 2/9] convert ParallelBitmapHeapState->state to an atomic
@ 2026-07-09 18:38 Nathan Bossart <nathan@postgresql.org>
  0 siblings, 0 replies; 440+ messages in thread

From: Nathan Bossart @ 2026-07-09 18:38 UTC (permalink / raw)

---
 src/backend/executor/nodeBitmapHeapscan.c | 23 +++++++----------------
 1 file changed, 7 insertions(+), 16 deletions(-)

diff --git a/src/backend/executor/nodeBitmapHeapscan.c b/src/backend/executor/nodeBitmapHeapscan.c
index 83d6478bc2b..a9e83f30687 100644
--- a/src/backend/executor/nodeBitmapHeapscan.c
+++ b/src/backend/executor/nodeBitmapHeapscan.c
@@ -79,7 +79,6 @@ typedef enum
 /* ----------------
  *	 ParallelBitmapHeapState information
  *		tbmiterator				iterator for scanning current pages
- *		mutex					mutual exclusion for state
  *		state					current state of the TIDBitmap
  *		cv						conditional wait variable
  * ----------------
@@ -87,8 +86,7 @@ typedef enum
 typedef struct ParallelBitmapHeapState
 {
 	dsa_pointer tbmiterator;
-	slock_t		mutex;
-	SharedBitmapState state;
+	pg_atomic_uint32 state;
 	ConditionVariable cv;
 } ParallelBitmapHeapState;
 
@@ -228,9 +226,7 @@ BitmapHeapNext(BitmapHeapScanState *node)
 static inline void
 BitmapDoneInitializingSharedState(ParallelBitmapHeapState *pstate)
 {
-	SpinLockAcquire(&pstate->mutex);
-	pstate->state = BM_FINISHED;
-	SpinLockRelease(&pstate->mutex);
+	pg_atomic_write_membarrier_u32(&pstate->state, BM_FINISHED);
 	ConditionVariableBroadcast(&pstate->cv);
 }
 
@@ -476,15 +472,12 @@ ExecInitBitmapHeapScan(BitmapHeapScan *node, EState *estate, int eflags)
 static bool
 BitmapShouldInitializeSharedState(ParallelBitmapHeapState *pstate)
 {
-	SharedBitmapState state;
+	uint32		state;
 
 	while (1)
 	{
-		SpinLockAcquire(&pstate->mutex);
-		state = pstate->state;
-		if (pstate->state == BM_INITIAL)
-			pstate->state = BM_INPROGRESS;
-		SpinLockRelease(&pstate->mutex);
+		state = BM_INITIAL;
+		pg_atomic_compare_exchange_u32(&pstate->state, &state, BM_INPROGRESS);
 
 		/* Exit if bitmap is done, or if we're the leader. */
 		if (state != BM_INPROGRESS)
@@ -538,9 +531,7 @@ ExecBitmapHeapInitializeDSM(BitmapHeapScanState *node,
 
 	pstate->tbmiterator = 0;
 
-	/* Initialize the mutex */
-	SpinLockInit(&pstate->mutex);
-	pstate->state = BM_INITIAL;
+	pg_atomic_init_u32(&pstate->state, BM_INITIAL);
 
 	ConditionVariableInit(&pstate->cv);
 
@@ -565,7 +556,7 @@ ExecBitmapHeapReInitializeDSM(BitmapHeapScanState *node,
 	if (dsa == NULL)
 		return;
 
-	pstate->state = BM_INITIAL;
+	pg_atomic_write_u32(&pstate->state, BM_INITIAL);
 
 	if (DsaPointerIsValid(pstate->tbmiterator))
 		tbm_free_shared_area(dsa, pstate->tbmiterator);
-- 
2.50.1 (Apple Git-155)


--Xf36GNcW+0xZNily
Content-Type: text/plain; charset=us-ascii
Content-Disposition: attachment;
	filename=v2-0003-convert-FixedParallelState-last_xlog_end-to-an-at.patch



^ permalink  raw  reply  [nested|flat] 440+ messages in thread

* [PATCH v2 2/9] convert ParallelBitmapHeapState->state to an atomic
@ 2026-07-09 18:38 Nathan Bossart <nathan@postgresql.org>
  0 siblings, 0 replies; 440+ messages in thread

From: Nathan Bossart @ 2026-07-09 18:38 UTC (permalink / raw)

---
 src/backend/executor/nodeBitmapHeapscan.c | 23 +++++++----------------
 1 file changed, 7 insertions(+), 16 deletions(-)

diff --git a/src/backend/executor/nodeBitmapHeapscan.c b/src/backend/executor/nodeBitmapHeapscan.c
index 83d6478bc2b..a9e83f30687 100644
--- a/src/backend/executor/nodeBitmapHeapscan.c
+++ b/src/backend/executor/nodeBitmapHeapscan.c
@@ -79,7 +79,6 @@ typedef enum
 /* ----------------
  *	 ParallelBitmapHeapState information
  *		tbmiterator				iterator for scanning current pages
- *		mutex					mutual exclusion for state
  *		state					current state of the TIDBitmap
  *		cv						conditional wait variable
  * ----------------
@@ -87,8 +86,7 @@ typedef enum
 typedef struct ParallelBitmapHeapState
 {
 	dsa_pointer tbmiterator;
-	slock_t		mutex;
-	SharedBitmapState state;
+	pg_atomic_uint32 state;
 	ConditionVariable cv;
 } ParallelBitmapHeapState;
 
@@ -228,9 +226,7 @@ BitmapHeapNext(BitmapHeapScanState *node)
 static inline void
 BitmapDoneInitializingSharedState(ParallelBitmapHeapState *pstate)
 {
-	SpinLockAcquire(&pstate->mutex);
-	pstate->state = BM_FINISHED;
-	SpinLockRelease(&pstate->mutex);
+	pg_atomic_write_membarrier_u32(&pstate->state, BM_FINISHED);
 	ConditionVariableBroadcast(&pstate->cv);
 }
 
@@ -476,15 +472,12 @@ ExecInitBitmapHeapScan(BitmapHeapScan *node, EState *estate, int eflags)
 static bool
 BitmapShouldInitializeSharedState(ParallelBitmapHeapState *pstate)
 {
-	SharedBitmapState state;
+	uint32		state;
 
 	while (1)
 	{
-		SpinLockAcquire(&pstate->mutex);
-		state = pstate->state;
-		if (pstate->state == BM_INITIAL)
-			pstate->state = BM_INPROGRESS;
-		SpinLockRelease(&pstate->mutex);
+		state = BM_INITIAL;
+		pg_atomic_compare_exchange_u32(&pstate->state, &state, BM_INPROGRESS);
 
 		/* Exit if bitmap is done, or if we're the leader. */
 		if (state != BM_INPROGRESS)
@@ -538,9 +531,7 @@ ExecBitmapHeapInitializeDSM(BitmapHeapScanState *node,
 
 	pstate->tbmiterator = 0;
 
-	/* Initialize the mutex */
-	SpinLockInit(&pstate->mutex);
-	pstate->state = BM_INITIAL;
+	pg_atomic_init_u32(&pstate->state, BM_INITIAL);
 
 	ConditionVariableInit(&pstate->cv);
 
@@ -565,7 +556,7 @@ ExecBitmapHeapReInitializeDSM(BitmapHeapScanState *node,
 	if (dsa == NULL)
 		return;
 
-	pstate->state = BM_INITIAL;
+	pg_atomic_write_u32(&pstate->state, BM_INITIAL);
 
 	if (DsaPointerIsValid(pstate->tbmiterator))
 		tbm_free_shared_area(dsa, pstate->tbmiterator);
-- 
2.50.1 (Apple Git-155)


--Xf36GNcW+0xZNily
Content-Type: text/plain; charset=us-ascii
Content-Disposition: attachment;
	filename=v2-0003-convert-FixedParallelState-last_xlog_end-to-an-at.patch



^ permalink  raw  reply  [nested|flat] 440+ messages in thread

* [PATCH v1 2/8] convert ParallelBitmapHeapState->state to an atomic
@ 2026-07-09 18:38 Nathan Bossart <nathan@postgresql.org>
  0 siblings, 0 replies; 440+ messages in thread

From: Nathan Bossart @ 2026-07-09 18:38 UTC (permalink / raw)

---
 src/backend/executor/nodeBitmapHeapscan.c | 21 ++++++---------------
 1 file changed, 6 insertions(+), 15 deletions(-)

diff --git a/src/backend/executor/nodeBitmapHeapscan.c b/src/backend/executor/nodeBitmapHeapscan.c
index 83d6478bc2b..f2bb487bf10 100644
--- a/src/backend/executor/nodeBitmapHeapscan.c
+++ b/src/backend/executor/nodeBitmapHeapscan.c
@@ -79,7 +79,6 @@ typedef enum
 /* ----------------
  *	 ParallelBitmapHeapState information
  *		tbmiterator				iterator for scanning current pages
- *		mutex					mutual exclusion for state
  *		state					current state of the TIDBitmap
  *		cv						conditional wait variable
  * ----------------
@@ -87,8 +86,7 @@ typedef enum
 typedef struct ParallelBitmapHeapState
 {
 	dsa_pointer tbmiterator;
-	slock_t		mutex;
-	SharedBitmapState state;
+	pg_atomic_uint32 state;
 	ConditionVariable cv;
 } ParallelBitmapHeapState;
 
@@ -228,9 +226,7 @@ BitmapHeapNext(BitmapHeapScanState *node)
 static inline void
 BitmapDoneInitializingSharedState(ParallelBitmapHeapState *pstate)
 {
-	SpinLockAcquire(&pstate->mutex);
-	pstate->state = BM_FINISHED;
-	SpinLockRelease(&pstate->mutex);
+	pg_atomic_write_membarrier_u32(&pstate->state, BM_FINISHED);
 	ConditionVariableBroadcast(&pstate->cv);
 }
 
@@ -480,11 +476,8 @@ BitmapShouldInitializeSharedState(ParallelBitmapHeapState *pstate)
 
 	while (1)
 	{
-		SpinLockAcquire(&pstate->mutex);
-		state = pstate->state;
-		if (pstate->state == BM_INITIAL)
-			pstate->state = BM_INPROGRESS;
-		SpinLockRelease(&pstate->mutex);
+		state = BM_INITIAL;
+		pg_atomic_compare_exchange_u32(&pstate->state, &state, BM_INPROGRESS);
 
 		/* Exit if bitmap is done, or if we're the leader. */
 		if (state != BM_INPROGRESS)
@@ -538,9 +531,7 @@ ExecBitmapHeapInitializeDSM(BitmapHeapScanState *node,
 
 	pstate->tbmiterator = 0;
 
-	/* Initialize the mutex */
-	SpinLockInit(&pstate->mutex);
-	pstate->state = BM_INITIAL;
+	pg_atomic_init_u32(&pstate->state, BM_INITIAL);
 
 	ConditionVariableInit(&pstate->cv);
 
@@ -565,7 +556,7 @@ ExecBitmapHeapReInitializeDSM(BitmapHeapScanState *node,
 	if (dsa == NULL)
 		return;
 
-	pstate->state = BM_INITIAL;
+	pg_atomic_write_u32(&pstate->state, BM_INITIAL);
 
 	if (DsaPointerIsValid(pstate->tbmiterator))
 		tbm_free_shared_area(dsa, pstate->tbmiterator);
-- 
2.50.1 (Apple Git-155)


--Ot5x3ffkWEuxilWO
Content-Type: text/plain; charset=us-ascii
Content-Disposition: attachment;
	filename=v1-0003-convert-FixedParallelState-last_xlog_end-to-an-at.patch



^ permalink  raw  reply  [nested|flat] 440+ messages in thread

* [PATCH v2 2/9] convert ParallelBitmapHeapState->state to an atomic
@ 2026-07-09 18:38 Nathan Bossart <nathan@postgresql.org>
  0 siblings, 0 replies; 440+ messages in thread

From: Nathan Bossart @ 2026-07-09 18:38 UTC (permalink / raw)

---
 src/backend/executor/nodeBitmapHeapscan.c | 23 +++++++----------------
 1 file changed, 7 insertions(+), 16 deletions(-)

diff --git a/src/backend/executor/nodeBitmapHeapscan.c b/src/backend/executor/nodeBitmapHeapscan.c
index 83d6478bc2b..a9e83f30687 100644
--- a/src/backend/executor/nodeBitmapHeapscan.c
+++ b/src/backend/executor/nodeBitmapHeapscan.c
@@ -79,7 +79,6 @@ typedef enum
 /* ----------------
  *	 ParallelBitmapHeapState information
  *		tbmiterator				iterator for scanning current pages
- *		mutex					mutual exclusion for state
  *		state					current state of the TIDBitmap
  *		cv						conditional wait variable
  * ----------------
@@ -87,8 +86,7 @@ typedef enum
 typedef struct ParallelBitmapHeapState
 {
 	dsa_pointer tbmiterator;
-	slock_t		mutex;
-	SharedBitmapState state;
+	pg_atomic_uint32 state;
 	ConditionVariable cv;
 } ParallelBitmapHeapState;
 
@@ -228,9 +226,7 @@ BitmapHeapNext(BitmapHeapScanState *node)
 static inline void
 BitmapDoneInitializingSharedState(ParallelBitmapHeapState *pstate)
 {
-	SpinLockAcquire(&pstate->mutex);
-	pstate->state = BM_FINISHED;
-	SpinLockRelease(&pstate->mutex);
+	pg_atomic_write_membarrier_u32(&pstate->state, BM_FINISHED);
 	ConditionVariableBroadcast(&pstate->cv);
 }
 
@@ -476,15 +472,12 @@ ExecInitBitmapHeapScan(BitmapHeapScan *node, EState *estate, int eflags)
 static bool
 BitmapShouldInitializeSharedState(ParallelBitmapHeapState *pstate)
 {
-	SharedBitmapState state;
+	uint32		state;
 
 	while (1)
 	{
-		SpinLockAcquire(&pstate->mutex);
-		state = pstate->state;
-		if (pstate->state == BM_INITIAL)
-			pstate->state = BM_INPROGRESS;
-		SpinLockRelease(&pstate->mutex);
+		state = BM_INITIAL;
+		pg_atomic_compare_exchange_u32(&pstate->state, &state, BM_INPROGRESS);
 
 		/* Exit if bitmap is done, or if we're the leader. */
 		if (state != BM_INPROGRESS)
@@ -538,9 +531,7 @@ ExecBitmapHeapInitializeDSM(BitmapHeapScanState *node,
 
 	pstate->tbmiterator = 0;
 
-	/* Initialize the mutex */
-	SpinLockInit(&pstate->mutex);
-	pstate->state = BM_INITIAL;
+	pg_atomic_init_u32(&pstate->state, BM_INITIAL);
 
 	ConditionVariableInit(&pstate->cv);
 
@@ -565,7 +556,7 @@ ExecBitmapHeapReInitializeDSM(BitmapHeapScanState *node,
 	if (dsa == NULL)
 		return;
 
-	pstate->state = BM_INITIAL;
+	pg_atomic_write_u32(&pstate->state, BM_INITIAL);
 
 	if (DsaPointerIsValid(pstate->tbmiterator))
 		tbm_free_shared_area(dsa, pstate->tbmiterator);
-- 
2.50.1 (Apple Git-155)


--Xf36GNcW+0xZNily
Content-Type: text/plain; charset=us-ascii
Content-Disposition: attachment;
	filename=v2-0003-convert-FixedParallelState-last_xlog_end-to-an-at.patch



^ permalink  raw  reply  [nested|flat] 440+ messages in thread

* [PATCH v2 2/9] convert ParallelBitmapHeapState->state to an atomic
@ 2026-07-09 18:38 Nathan Bossart <nathan@postgresql.org>
  0 siblings, 0 replies; 440+ messages in thread

From: Nathan Bossart @ 2026-07-09 18:38 UTC (permalink / raw)

---
 src/backend/executor/nodeBitmapHeapscan.c | 23 +++++++----------------
 1 file changed, 7 insertions(+), 16 deletions(-)

diff --git a/src/backend/executor/nodeBitmapHeapscan.c b/src/backend/executor/nodeBitmapHeapscan.c
index 83d6478bc2b..a9e83f30687 100644
--- a/src/backend/executor/nodeBitmapHeapscan.c
+++ b/src/backend/executor/nodeBitmapHeapscan.c
@@ -79,7 +79,6 @@ typedef enum
 /* ----------------
  *	 ParallelBitmapHeapState information
  *		tbmiterator				iterator for scanning current pages
- *		mutex					mutual exclusion for state
  *		state					current state of the TIDBitmap
  *		cv						conditional wait variable
  * ----------------
@@ -87,8 +86,7 @@ typedef enum
 typedef struct ParallelBitmapHeapState
 {
 	dsa_pointer tbmiterator;
-	slock_t		mutex;
-	SharedBitmapState state;
+	pg_atomic_uint32 state;
 	ConditionVariable cv;
 } ParallelBitmapHeapState;
 
@@ -228,9 +226,7 @@ BitmapHeapNext(BitmapHeapScanState *node)
 static inline void
 BitmapDoneInitializingSharedState(ParallelBitmapHeapState *pstate)
 {
-	SpinLockAcquire(&pstate->mutex);
-	pstate->state = BM_FINISHED;
-	SpinLockRelease(&pstate->mutex);
+	pg_atomic_write_membarrier_u32(&pstate->state, BM_FINISHED);
 	ConditionVariableBroadcast(&pstate->cv);
 }
 
@@ -476,15 +472,12 @@ ExecInitBitmapHeapScan(BitmapHeapScan *node, EState *estate, int eflags)
 static bool
 BitmapShouldInitializeSharedState(ParallelBitmapHeapState *pstate)
 {
-	SharedBitmapState state;
+	uint32		state;
 
 	while (1)
 	{
-		SpinLockAcquire(&pstate->mutex);
-		state = pstate->state;
-		if (pstate->state == BM_INITIAL)
-			pstate->state = BM_INPROGRESS;
-		SpinLockRelease(&pstate->mutex);
+		state = BM_INITIAL;
+		pg_atomic_compare_exchange_u32(&pstate->state, &state, BM_INPROGRESS);
 
 		/* Exit if bitmap is done, or if we're the leader. */
 		if (state != BM_INPROGRESS)
@@ -538,9 +531,7 @@ ExecBitmapHeapInitializeDSM(BitmapHeapScanState *node,
 
 	pstate->tbmiterator = 0;
 
-	/* Initialize the mutex */
-	SpinLockInit(&pstate->mutex);
-	pstate->state = BM_INITIAL;
+	pg_atomic_init_u32(&pstate->state, BM_INITIAL);
 
 	ConditionVariableInit(&pstate->cv);
 
@@ -565,7 +556,7 @@ ExecBitmapHeapReInitializeDSM(BitmapHeapScanState *node,
 	if (dsa == NULL)
 		return;
 
-	pstate->state = BM_INITIAL;
+	pg_atomic_write_u32(&pstate->state, BM_INITIAL);
 
 	if (DsaPointerIsValid(pstate->tbmiterator))
 		tbm_free_shared_area(dsa, pstate->tbmiterator);
-- 
2.50.1 (Apple Git-155)


--Xf36GNcW+0xZNily
Content-Type: text/plain; charset=us-ascii
Content-Disposition: attachment;
	filename=v2-0003-convert-FixedParallelState-last_xlog_end-to-an-at.patch



^ permalink  raw  reply  [nested|flat] 440+ messages in thread

* [PATCH v1 2/8] convert ParallelBitmapHeapState->state to an atomic
@ 2026-07-09 18:38 Nathan Bossart <nathan@postgresql.org>
  0 siblings, 0 replies; 440+ messages in thread

From: Nathan Bossart @ 2026-07-09 18:38 UTC (permalink / raw)

---
 src/backend/executor/nodeBitmapHeapscan.c | 21 ++++++---------------
 1 file changed, 6 insertions(+), 15 deletions(-)

diff --git a/src/backend/executor/nodeBitmapHeapscan.c b/src/backend/executor/nodeBitmapHeapscan.c
index 83d6478bc2b..f2bb487bf10 100644
--- a/src/backend/executor/nodeBitmapHeapscan.c
+++ b/src/backend/executor/nodeBitmapHeapscan.c
@@ -79,7 +79,6 @@ typedef enum
 /* ----------------
  *	 ParallelBitmapHeapState information
  *		tbmiterator				iterator for scanning current pages
- *		mutex					mutual exclusion for state
  *		state					current state of the TIDBitmap
  *		cv						conditional wait variable
  * ----------------
@@ -87,8 +86,7 @@ typedef enum
 typedef struct ParallelBitmapHeapState
 {
 	dsa_pointer tbmiterator;
-	slock_t		mutex;
-	SharedBitmapState state;
+	pg_atomic_uint32 state;
 	ConditionVariable cv;
 } ParallelBitmapHeapState;
 
@@ -228,9 +226,7 @@ BitmapHeapNext(BitmapHeapScanState *node)
 static inline void
 BitmapDoneInitializingSharedState(ParallelBitmapHeapState *pstate)
 {
-	SpinLockAcquire(&pstate->mutex);
-	pstate->state = BM_FINISHED;
-	SpinLockRelease(&pstate->mutex);
+	pg_atomic_write_membarrier_u32(&pstate->state, BM_FINISHED);
 	ConditionVariableBroadcast(&pstate->cv);
 }
 
@@ -480,11 +476,8 @@ BitmapShouldInitializeSharedState(ParallelBitmapHeapState *pstate)
 
 	while (1)
 	{
-		SpinLockAcquire(&pstate->mutex);
-		state = pstate->state;
-		if (pstate->state == BM_INITIAL)
-			pstate->state = BM_INPROGRESS;
-		SpinLockRelease(&pstate->mutex);
+		state = BM_INITIAL;
+		pg_atomic_compare_exchange_u32(&pstate->state, &state, BM_INPROGRESS);
 
 		/* Exit if bitmap is done, or if we're the leader. */
 		if (state != BM_INPROGRESS)
@@ -538,9 +531,7 @@ ExecBitmapHeapInitializeDSM(BitmapHeapScanState *node,
 
 	pstate->tbmiterator = 0;
 
-	/* Initialize the mutex */
-	SpinLockInit(&pstate->mutex);
-	pstate->state = BM_INITIAL;
+	pg_atomic_init_u32(&pstate->state, BM_INITIAL);
 
 	ConditionVariableInit(&pstate->cv);
 
@@ -565,7 +556,7 @@ ExecBitmapHeapReInitializeDSM(BitmapHeapScanState *node,
 	if (dsa == NULL)
 		return;
 
-	pstate->state = BM_INITIAL;
+	pg_atomic_write_u32(&pstate->state, BM_INITIAL);
 
 	if (DsaPointerIsValid(pstate->tbmiterator))
 		tbm_free_shared_area(dsa, pstate->tbmiterator);
-- 
2.50.1 (Apple Git-155)


--Ot5x3ffkWEuxilWO
Content-Type: text/plain; charset=us-ascii
Content-Disposition: attachment;
	filename=v1-0003-convert-FixedParallelState-last_xlog_end-to-an-at.patch



^ permalink  raw  reply  [nested|flat] 440+ messages in thread

* [PATCH v1 2/8] convert ParallelBitmapHeapState->state to an atomic
@ 2026-07-09 18:38 Nathan Bossart <nathan@postgresql.org>
  0 siblings, 0 replies; 440+ messages in thread

From: Nathan Bossart @ 2026-07-09 18:38 UTC (permalink / raw)

---
 src/backend/executor/nodeBitmapHeapscan.c | 21 ++++++---------------
 1 file changed, 6 insertions(+), 15 deletions(-)

diff --git a/src/backend/executor/nodeBitmapHeapscan.c b/src/backend/executor/nodeBitmapHeapscan.c
index 83d6478bc2b..f2bb487bf10 100644
--- a/src/backend/executor/nodeBitmapHeapscan.c
+++ b/src/backend/executor/nodeBitmapHeapscan.c
@@ -79,7 +79,6 @@ typedef enum
 /* ----------------
  *	 ParallelBitmapHeapState information
  *		tbmiterator				iterator for scanning current pages
- *		mutex					mutual exclusion for state
  *		state					current state of the TIDBitmap
  *		cv						conditional wait variable
  * ----------------
@@ -87,8 +86,7 @@ typedef enum
 typedef struct ParallelBitmapHeapState
 {
 	dsa_pointer tbmiterator;
-	slock_t		mutex;
-	SharedBitmapState state;
+	pg_atomic_uint32 state;
 	ConditionVariable cv;
 } ParallelBitmapHeapState;
 
@@ -228,9 +226,7 @@ BitmapHeapNext(BitmapHeapScanState *node)
 static inline void
 BitmapDoneInitializingSharedState(ParallelBitmapHeapState *pstate)
 {
-	SpinLockAcquire(&pstate->mutex);
-	pstate->state = BM_FINISHED;
-	SpinLockRelease(&pstate->mutex);
+	pg_atomic_write_membarrier_u32(&pstate->state, BM_FINISHED);
 	ConditionVariableBroadcast(&pstate->cv);
 }
 
@@ -480,11 +476,8 @@ BitmapShouldInitializeSharedState(ParallelBitmapHeapState *pstate)
 
 	while (1)
 	{
-		SpinLockAcquire(&pstate->mutex);
-		state = pstate->state;
-		if (pstate->state == BM_INITIAL)
-			pstate->state = BM_INPROGRESS;
-		SpinLockRelease(&pstate->mutex);
+		state = BM_INITIAL;
+		pg_atomic_compare_exchange_u32(&pstate->state, &state, BM_INPROGRESS);
 
 		/* Exit if bitmap is done, or if we're the leader. */
 		if (state != BM_INPROGRESS)
@@ -538,9 +531,7 @@ ExecBitmapHeapInitializeDSM(BitmapHeapScanState *node,
 
 	pstate->tbmiterator = 0;
 
-	/* Initialize the mutex */
-	SpinLockInit(&pstate->mutex);
-	pstate->state = BM_INITIAL;
+	pg_atomic_init_u32(&pstate->state, BM_INITIAL);
 
 	ConditionVariableInit(&pstate->cv);
 
@@ -565,7 +556,7 @@ ExecBitmapHeapReInitializeDSM(BitmapHeapScanState *node,
 	if (dsa == NULL)
 		return;
 
-	pstate->state = BM_INITIAL;
+	pg_atomic_write_u32(&pstate->state, BM_INITIAL);
 
 	if (DsaPointerIsValid(pstate->tbmiterator))
 		tbm_free_shared_area(dsa, pstate->tbmiterator);
-- 
2.50.1 (Apple Git-155)


--Ot5x3ffkWEuxilWO
Content-Type: text/plain; charset=us-ascii
Content-Disposition: attachment;
	filename=v1-0003-convert-FixedParallelState-last_xlog_end-to-an-at.patch



^ permalink  raw  reply  [nested|flat] 440+ messages in thread

* [PATCH v2 2/9] convert ParallelBitmapHeapState->state to an atomic
@ 2026-07-09 18:38 Nathan Bossart <nathan@postgresql.org>
  0 siblings, 0 replies; 440+ messages in thread

From: Nathan Bossart @ 2026-07-09 18:38 UTC (permalink / raw)

---
 src/backend/executor/nodeBitmapHeapscan.c | 23 +++++++----------------
 1 file changed, 7 insertions(+), 16 deletions(-)

diff --git a/src/backend/executor/nodeBitmapHeapscan.c b/src/backend/executor/nodeBitmapHeapscan.c
index 83d6478bc2b..a9e83f30687 100644
--- a/src/backend/executor/nodeBitmapHeapscan.c
+++ b/src/backend/executor/nodeBitmapHeapscan.c
@@ -79,7 +79,6 @@ typedef enum
 /* ----------------
  *	 ParallelBitmapHeapState information
  *		tbmiterator				iterator for scanning current pages
- *		mutex					mutual exclusion for state
  *		state					current state of the TIDBitmap
  *		cv						conditional wait variable
  * ----------------
@@ -87,8 +86,7 @@ typedef enum
 typedef struct ParallelBitmapHeapState
 {
 	dsa_pointer tbmiterator;
-	slock_t		mutex;
-	SharedBitmapState state;
+	pg_atomic_uint32 state;
 	ConditionVariable cv;
 } ParallelBitmapHeapState;
 
@@ -228,9 +226,7 @@ BitmapHeapNext(BitmapHeapScanState *node)
 static inline void
 BitmapDoneInitializingSharedState(ParallelBitmapHeapState *pstate)
 {
-	SpinLockAcquire(&pstate->mutex);
-	pstate->state = BM_FINISHED;
-	SpinLockRelease(&pstate->mutex);
+	pg_atomic_write_membarrier_u32(&pstate->state, BM_FINISHED);
 	ConditionVariableBroadcast(&pstate->cv);
 }
 
@@ -476,15 +472,12 @@ ExecInitBitmapHeapScan(BitmapHeapScan *node, EState *estate, int eflags)
 static bool
 BitmapShouldInitializeSharedState(ParallelBitmapHeapState *pstate)
 {
-	SharedBitmapState state;
+	uint32		state;
 
 	while (1)
 	{
-		SpinLockAcquire(&pstate->mutex);
-		state = pstate->state;
-		if (pstate->state == BM_INITIAL)
-			pstate->state = BM_INPROGRESS;
-		SpinLockRelease(&pstate->mutex);
+		state = BM_INITIAL;
+		pg_atomic_compare_exchange_u32(&pstate->state, &state, BM_INPROGRESS);
 
 		/* Exit if bitmap is done, or if we're the leader. */
 		if (state != BM_INPROGRESS)
@@ -538,9 +531,7 @@ ExecBitmapHeapInitializeDSM(BitmapHeapScanState *node,
 
 	pstate->tbmiterator = 0;
 
-	/* Initialize the mutex */
-	SpinLockInit(&pstate->mutex);
-	pstate->state = BM_INITIAL;
+	pg_atomic_init_u32(&pstate->state, BM_INITIAL);
 
 	ConditionVariableInit(&pstate->cv);
 
@@ -565,7 +556,7 @@ ExecBitmapHeapReInitializeDSM(BitmapHeapScanState *node,
 	if (dsa == NULL)
 		return;
 
-	pstate->state = BM_INITIAL;
+	pg_atomic_write_u32(&pstate->state, BM_INITIAL);
 
 	if (DsaPointerIsValid(pstate->tbmiterator))
 		tbm_free_shared_area(dsa, pstate->tbmiterator);
-- 
2.50.1 (Apple Git-155)


--Xf36GNcW+0xZNily
Content-Type: text/plain; charset=us-ascii
Content-Disposition: attachment;
	filename=v2-0003-convert-FixedParallelState-last_xlog_end-to-an-at.patch



^ permalink  raw  reply  [nested|flat] 440+ messages in thread

* [PATCH v1 2/8] convert ParallelBitmapHeapState->state to an atomic
@ 2026-07-09 18:38 Nathan Bossart <nathan@postgresql.org>
  0 siblings, 0 replies; 440+ messages in thread

From: Nathan Bossart @ 2026-07-09 18:38 UTC (permalink / raw)

---
 src/backend/executor/nodeBitmapHeapscan.c | 21 ++++++---------------
 1 file changed, 6 insertions(+), 15 deletions(-)

diff --git a/src/backend/executor/nodeBitmapHeapscan.c b/src/backend/executor/nodeBitmapHeapscan.c
index 83d6478bc2b..f2bb487bf10 100644
--- a/src/backend/executor/nodeBitmapHeapscan.c
+++ b/src/backend/executor/nodeBitmapHeapscan.c
@@ -79,7 +79,6 @@ typedef enum
 /* ----------------
  *	 ParallelBitmapHeapState information
  *		tbmiterator				iterator for scanning current pages
- *		mutex					mutual exclusion for state
  *		state					current state of the TIDBitmap
  *		cv						conditional wait variable
  * ----------------
@@ -87,8 +86,7 @@ typedef enum
 typedef struct ParallelBitmapHeapState
 {
 	dsa_pointer tbmiterator;
-	slock_t		mutex;
-	SharedBitmapState state;
+	pg_atomic_uint32 state;
 	ConditionVariable cv;
 } ParallelBitmapHeapState;
 
@@ -228,9 +226,7 @@ BitmapHeapNext(BitmapHeapScanState *node)
 static inline void
 BitmapDoneInitializingSharedState(ParallelBitmapHeapState *pstate)
 {
-	SpinLockAcquire(&pstate->mutex);
-	pstate->state = BM_FINISHED;
-	SpinLockRelease(&pstate->mutex);
+	pg_atomic_write_membarrier_u32(&pstate->state, BM_FINISHED);
 	ConditionVariableBroadcast(&pstate->cv);
 }
 
@@ -480,11 +476,8 @@ BitmapShouldInitializeSharedState(ParallelBitmapHeapState *pstate)
 
 	while (1)
 	{
-		SpinLockAcquire(&pstate->mutex);
-		state = pstate->state;
-		if (pstate->state == BM_INITIAL)
-			pstate->state = BM_INPROGRESS;
-		SpinLockRelease(&pstate->mutex);
+		state = BM_INITIAL;
+		pg_atomic_compare_exchange_u32(&pstate->state, &state, BM_INPROGRESS);
 
 		/* Exit if bitmap is done, or if we're the leader. */
 		if (state != BM_INPROGRESS)
@@ -538,9 +531,7 @@ ExecBitmapHeapInitializeDSM(BitmapHeapScanState *node,
 
 	pstate->tbmiterator = 0;
 
-	/* Initialize the mutex */
-	SpinLockInit(&pstate->mutex);
-	pstate->state = BM_INITIAL;
+	pg_atomic_init_u32(&pstate->state, BM_INITIAL);
 
 	ConditionVariableInit(&pstate->cv);
 
@@ -565,7 +556,7 @@ ExecBitmapHeapReInitializeDSM(BitmapHeapScanState *node,
 	if (dsa == NULL)
 		return;
 
-	pstate->state = BM_INITIAL;
+	pg_atomic_write_u32(&pstate->state, BM_INITIAL);
 
 	if (DsaPointerIsValid(pstate->tbmiterator))
 		tbm_free_shared_area(dsa, pstate->tbmiterator);
-- 
2.50.1 (Apple Git-155)


--Ot5x3ffkWEuxilWO
Content-Type: text/plain; charset=us-ascii
Content-Disposition: attachment;
	filename=v1-0003-convert-FixedParallelState-last_xlog_end-to-an-at.patch



^ permalink  raw  reply  [nested|flat] 440+ messages in thread

* [PATCH v1 2/8] convert ParallelBitmapHeapState->state to an atomic
@ 2026-07-09 18:38 Nathan Bossart <nathan@postgresql.org>
  0 siblings, 0 replies; 440+ messages in thread

From: Nathan Bossart @ 2026-07-09 18:38 UTC (permalink / raw)

---
 src/backend/executor/nodeBitmapHeapscan.c | 21 ++++++---------------
 1 file changed, 6 insertions(+), 15 deletions(-)

diff --git a/src/backend/executor/nodeBitmapHeapscan.c b/src/backend/executor/nodeBitmapHeapscan.c
index 83d6478bc2b..f2bb487bf10 100644
--- a/src/backend/executor/nodeBitmapHeapscan.c
+++ b/src/backend/executor/nodeBitmapHeapscan.c
@@ -79,7 +79,6 @@ typedef enum
 /* ----------------
  *	 ParallelBitmapHeapState information
  *		tbmiterator				iterator for scanning current pages
- *		mutex					mutual exclusion for state
  *		state					current state of the TIDBitmap
  *		cv						conditional wait variable
  * ----------------
@@ -87,8 +86,7 @@ typedef enum
 typedef struct ParallelBitmapHeapState
 {
 	dsa_pointer tbmiterator;
-	slock_t		mutex;
-	SharedBitmapState state;
+	pg_atomic_uint32 state;
 	ConditionVariable cv;
 } ParallelBitmapHeapState;
 
@@ -228,9 +226,7 @@ BitmapHeapNext(BitmapHeapScanState *node)
 static inline void
 BitmapDoneInitializingSharedState(ParallelBitmapHeapState *pstate)
 {
-	SpinLockAcquire(&pstate->mutex);
-	pstate->state = BM_FINISHED;
-	SpinLockRelease(&pstate->mutex);
+	pg_atomic_write_membarrier_u32(&pstate->state, BM_FINISHED);
 	ConditionVariableBroadcast(&pstate->cv);
 }
 
@@ -480,11 +476,8 @@ BitmapShouldInitializeSharedState(ParallelBitmapHeapState *pstate)
 
 	while (1)
 	{
-		SpinLockAcquire(&pstate->mutex);
-		state = pstate->state;
-		if (pstate->state == BM_INITIAL)
-			pstate->state = BM_INPROGRESS;
-		SpinLockRelease(&pstate->mutex);
+		state = BM_INITIAL;
+		pg_atomic_compare_exchange_u32(&pstate->state, &state, BM_INPROGRESS);
 
 		/* Exit if bitmap is done, or if we're the leader. */
 		if (state != BM_INPROGRESS)
@@ -538,9 +531,7 @@ ExecBitmapHeapInitializeDSM(BitmapHeapScanState *node,
 
 	pstate->tbmiterator = 0;
 
-	/* Initialize the mutex */
-	SpinLockInit(&pstate->mutex);
-	pstate->state = BM_INITIAL;
+	pg_atomic_init_u32(&pstate->state, BM_INITIAL);
 
 	ConditionVariableInit(&pstate->cv);
 
@@ -565,7 +556,7 @@ ExecBitmapHeapReInitializeDSM(BitmapHeapScanState *node,
 	if (dsa == NULL)
 		return;
 
-	pstate->state = BM_INITIAL;
+	pg_atomic_write_u32(&pstate->state, BM_INITIAL);
 
 	if (DsaPointerIsValid(pstate->tbmiterator))
 		tbm_free_shared_area(dsa, pstate->tbmiterator);
-- 
2.50.1 (Apple Git-155)


--Ot5x3ffkWEuxilWO
Content-Type: text/plain; charset=us-ascii
Content-Disposition: attachment;
	filename=v1-0003-convert-FixedParallelState-last_xlog_end-to-an-at.patch



^ permalink  raw  reply  [nested|flat] 440+ messages in thread

* [PATCH v1 2/8] convert ParallelBitmapHeapState->state to an atomic
@ 2026-07-09 18:38 Nathan Bossart <nathan@postgresql.org>
  0 siblings, 0 replies; 440+ messages in thread

From: Nathan Bossart @ 2026-07-09 18:38 UTC (permalink / raw)

---
 src/backend/executor/nodeBitmapHeapscan.c | 21 ++++++---------------
 1 file changed, 6 insertions(+), 15 deletions(-)

diff --git a/src/backend/executor/nodeBitmapHeapscan.c b/src/backend/executor/nodeBitmapHeapscan.c
index 83d6478bc2b..f2bb487bf10 100644
--- a/src/backend/executor/nodeBitmapHeapscan.c
+++ b/src/backend/executor/nodeBitmapHeapscan.c
@@ -79,7 +79,6 @@ typedef enum
 /* ----------------
  *	 ParallelBitmapHeapState information
  *		tbmiterator				iterator for scanning current pages
- *		mutex					mutual exclusion for state
  *		state					current state of the TIDBitmap
  *		cv						conditional wait variable
  * ----------------
@@ -87,8 +86,7 @@ typedef enum
 typedef struct ParallelBitmapHeapState
 {
 	dsa_pointer tbmiterator;
-	slock_t		mutex;
-	SharedBitmapState state;
+	pg_atomic_uint32 state;
 	ConditionVariable cv;
 } ParallelBitmapHeapState;
 
@@ -228,9 +226,7 @@ BitmapHeapNext(BitmapHeapScanState *node)
 static inline void
 BitmapDoneInitializingSharedState(ParallelBitmapHeapState *pstate)
 {
-	SpinLockAcquire(&pstate->mutex);
-	pstate->state = BM_FINISHED;
-	SpinLockRelease(&pstate->mutex);
+	pg_atomic_write_membarrier_u32(&pstate->state, BM_FINISHED);
 	ConditionVariableBroadcast(&pstate->cv);
 }
 
@@ -480,11 +476,8 @@ BitmapShouldInitializeSharedState(ParallelBitmapHeapState *pstate)
 
 	while (1)
 	{
-		SpinLockAcquire(&pstate->mutex);
-		state = pstate->state;
-		if (pstate->state == BM_INITIAL)
-			pstate->state = BM_INPROGRESS;
-		SpinLockRelease(&pstate->mutex);
+		state = BM_INITIAL;
+		pg_atomic_compare_exchange_u32(&pstate->state, &state, BM_INPROGRESS);
 
 		/* Exit if bitmap is done, or if we're the leader. */
 		if (state != BM_INPROGRESS)
@@ -538,9 +531,7 @@ ExecBitmapHeapInitializeDSM(BitmapHeapScanState *node,
 
 	pstate->tbmiterator = 0;
 
-	/* Initialize the mutex */
-	SpinLockInit(&pstate->mutex);
-	pstate->state = BM_INITIAL;
+	pg_atomic_init_u32(&pstate->state, BM_INITIAL);
 
 	ConditionVariableInit(&pstate->cv);
 
@@ -565,7 +556,7 @@ ExecBitmapHeapReInitializeDSM(BitmapHeapScanState *node,
 	if (dsa == NULL)
 		return;
 
-	pstate->state = BM_INITIAL;
+	pg_atomic_write_u32(&pstate->state, BM_INITIAL);
 
 	if (DsaPointerIsValid(pstate->tbmiterator))
 		tbm_free_shared_area(dsa, pstate->tbmiterator);
-- 
2.50.1 (Apple Git-155)


--Ot5x3ffkWEuxilWO
Content-Type: text/plain; charset=us-ascii
Content-Disposition: attachment;
	filename=v1-0003-convert-FixedParallelState-last_xlog_end-to-an-at.patch



^ permalink  raw  reply  [nested|flat] 440+ messages in thread

* [PATCH v1 2/8] convert ParallelBitmapHeapState->state to an atomic
@ 2026-07-09 18:38 Nathan Bossart <nathan@postgresql.org>
  0 siblings, 0 replies; 440+ messages in thread

From: Nathan Bossart @ 2026-07-09 18:38 UTC (permalink / raw)

---
 src/backend/executor/nodeBitmapHeapscan.c | 21 ++++++---------------
 1 file changed, 6 insertions(+), 15 deletions(-)

diff --git a/src/backend/executor/nodeBitmapHeapscan.c b/src/backend/executor/nodeBitmapHeapscan.c
index 83d6478bc2b..f2bb487bf10 100644
--- a/src/backend/executor/nodeBitmapHeapscan.c
+++ b/src/backend/executor/nodeBitmapHeapscan.c
@@ -79,7 +79,6 @@ typedef enum
 /* ----------------
  *	 ParallelBitmapHeapState information
  *		tbmiterator				iterator for scanning current pages
- *		mutex					mutual exclusion for state
  *		state					current state of the TIDBitmap
  *		cv						conditional wait variable
  * ----------------
@@ -87,8 +86,7 @@ typedef enum
 typedef struct ParallelBitmapHeapState
 {
 	dsa_pointer tbmiterator;
-	slock_t		mutex;
-	SharedBitmapState state;
+	pg_atomic_uint32 state;
 	ConditionVariable cv;
 } ParallelBitmapHeapState;
 
@@ -228,9 +226,7 @@ BitmapHeapNext(BitmapHeapScanState *node)
 static inline void
 BitmapDoneInitializingSharedState(ParallelBitmapHeapState *pstate)
 {
-	SpinLockAcquire(&pstate->mutex);
-	pstate->state = BM_FINISHED;
-	SpinLockRelease(&pstate->mutex);
+	pg_atomic_write_membarrier_u32(&pstate->state, BM_FINISHED);
 	ConditionVariableBroadcast(&pstate->cv);
 }
 
@@ -480,11 +476,8 @@ BitmapShouldInitializeSharedState(ParallelBitmapHeapState *pstate)
 
 	while (1)
 	{
-		SpinLockAcquire(&pstate->mutex);
-		state = pstate->state;
-		if (pstate->state == BM_INITIAL)
-			pstate->state = BM_INPROGRESS;
-		SpinLockRelease(&pstate->mutex);
+		state = BM_INITIAL;
+		pg_atomic_compare_exchange_u32(&pstate->state, &state, BM_INPROGRESS);
 
 		/* Exit if bitmap is done, or if we're the leader. */
 		if (state != BM_INPROGRESS)
@@ -538,9 +531,7 @@ ExecBitmapHeapInitializeDSM(BitmapHeapScanState *node,
 
 	pstate->tbmiterator = 0;
 
-	/* Initialize the mutex */
-	SpinLockInit(&pstate->mutex);
-	pstate->state = BM_INITIAL;
+	pg_atomic_init_u32(&pstate->state, BM_INITIAL);
 
 	ConditionVariableInit(&pstate->cv);
 
@@ -565,7 +556,7 @@ ExecBitmapHeapReInitializeDSM(BitmapHeapScanState *node,
 	if (dsa == NULL)
 		return;
 
-	pstate->state = BM_INITIAL;
+	pg_atomic_write_u32(&pstate->state, BM_INITIAL);
 
 	if (DsaPointerIsValid(pstate->tbmiterator))
 		tbm_free_shared_area(dsa, pstate->tbmiterator);
-- 
2.50.1 (Apple Git-155)


--Ot5x3ffkWEuxilWO
Content-Type: text/plain; charset=us-ascii
Content-Disposition: attachment;
	filename=v1-0003-convert-FixedParallelState-last_xlog_end-to-an-at.patch



^ permalink  raw  reply  [nested|flat] 440+ messages in thread

* [PATCH v1 2/8] convert ParallelBitmapHeapState->state to an atomic
@ 2026-07-09 18:38 Nathan Bossart <nathan@postgresql.org>
  0 siblings, 0 replies; 440+ messages in thread

From: Nathan Bossart @ 2026-07-09 18:38 UTC (permalink / raw)

---
 src/backend/executor/nodeBitmapHeapscan.c | 21 ++++++---------------
 1 file changed, 6 insertions(+), 15 deletions(-)

diff --git a/src/backend/executor/nodeBitmapHeapscan.c b/src/backend/executor/nodeBitmapHeapscan.c
index 83d6478bc2b..f2bb487bf10 100644
--- a/src/backend/executor/nodeBitmapHeapscan.c
+++ b/src/backend/executor/nodeBitmapHeapscan.c
@@ -79,7 +79,6 @@ typedef enum
 /* ----------------
  *	 ParallelBitmapHeapState information
  *		tbmiterator				iterator for scanning current pages
- *		mutex					mutual exclusion for state
  *		state					current state of the TIDBitmap
  *		cv						conditional wait variable
  * ----------------
@@ -87,8 +86,7 @@ typedef enum
 typedef struct ParallelBitmapHeapState
 {
 	dsa_pointer tbmiterator;
-	slock_t		mutex;
-	SharedBitmapState state;
+	pg_atomic_uint32 state;
 	ConditionVariable cv;
 } ParallelBitmapHeapState;
 
@@ -228,9 +226,7 @@ BitmapHeapNext(BitmapHeapScanState *node)
 static inline void
 BitmapDoneInitializingSharedState(ParallelBitmapHeapState *pstate)
 {
-	SpinLockAcquire(&pstate->mutex);
-	pstate->state = BM_FINISHED;
-	SpinLockRelease(&pstate->mutex);
+	pg_atomic_write_membarrier_u32(&pstate->state, BM_FINISHED);
 	ConditionVariableBroadcast(&pstate->cv);
 }
 
@@ -480,11 +476,8 @@ BitmapShouldInitializeSharedState(ParallelBitmapHeapState *pstate)
 
 	while (1)
 	{
-		SpinLockAcquire(&pstate->mutex);
-		state = pstate->state;
-		if (pstate->state == BM_INITIAL)
-			pstate->state = BM_INPROGRESS;
-		SpinLockRelease(&pstate->mutex);
+		state = BM_INITIAL;
+		pg_atomic_compare_exchange_u32(&pstate->state, &state, BM_INPROGRESS);
 
 		/* Exit if bitmap is done, or if we're the leader. */
 		if (state != BM_INPROGRESS)
@@ -538,9 +531,7 @@ ExecBitmapHeapInitializeDSM(BitmapHeapScanState *node,
 
 	pstate->tbmiterator = 0;
 
-	/* Initialize the mutex */
-	SpinLockInit(&pstate->mutex);
-	pstate->state = BM_INITIAL;
+	pg_atomic_init_u32(&pstate->state, BM_INITIAL);
 
 	ConditionVariableInit(&pstate->cv);
 
@@ -565,7 +556,7 @@ ExecBitmapHeapReInitializeDSM(BitmapHeapScanState *node,
 	if (dsa == NULL)
 		return;
 
-	pstate->state = BM_INITIAL;
+	pg_atomic_write_u32(&pstate->state, BM_INITIAL);
 
 	if (DsaPointerIsValid(pstate->tbmiterator))
 		tbm_free_shared_area(dsa, pstate->tbmiterator);
-- 
2.50.1 (Apple Git-155)


--Ot5x3ffkWEuxilWO
Content-Type: text/plain; charset=us-ascii
Content-Disposition: attachment;
	filename=v1-0003-convert-FixedParallelState-last_xlog_end-to-an-at.patch



^ permalink  raw  reply  [nested|flat] 440+ messages in thread

* [PATCH v1 2/8] convert ParallelBitmapHeapState->state to an atomic
@ 2026-07-09 18:38 Nathan Bossart <nathan@postgresql.org>
  0 siblings, 0 replies; 440+ messages in thread

From: Nathan Bossart @ 2026-07-09 18:38 UTC (permalink / raw)

---
 src/backend/executor/nodeBitmapHeapscan.c | 21 ++++++---------------
 1 file changed, 6 insertions(+), 15 deletions(-)

diff --git a/src/backend/executor/nodeBitmapHeapscan.c b/src/backend/executor/nodeBitmapHeapscan.c
index 83d6478bc2b..f2bb487bf10 100644
--- a/src/backend/executor/nodeBitmapHeapscan.c
+++ b/src/backend/executor/nodeBitmapHeapscan.c
@@ -79,7 +79,6 @@ typedef enum
 /* ----------------
  *	 ParallelBitmapHeapState information
  *		tbmiterator				iterator for scanning current pages
- *		mutex					mutual exclusion for state
  *		state					current state of the TIDBitmap
  *		cv						conditional wait variable
  * ----------------
@@ -87,8 +86,7 @@ typedef enum
 typedef struct ParallelBitmapHeapState
 {
 	dsa_pointer tbmiterator;
-	slock_t		mutex;
-	SharedBitmapState state;
+	pg_atomic_uint32 state;
 	ConditionVariable cv;
 } ParallelBitmapHeapState;
 
@@ -228,9 +226,7 @@ BitmapHeapNext(BitmapHeapScanState *node)
 static inline void
 BitmapDoneInitializingSharedState(ParallelBitmapHeapState *pstate)
 {
-	SpinLockAcquire(&pstate->mutex);
-	pstate->state = BM_FINISHED;
-	SpinLockRelease(&pstate->mutex);
+	pg_atomic_write_membarrier_u32(&pstate->state, BM_FINISHED);
 	ConditionVariableBroadcast(&pstate->cv);
 }
 
@@ -480,11 +476,8 @@ BitmapShouldInitializeSharedState(ParallelBitmapHeapState *pstate)
 
 	while (1)
 	{
-		SpinLockAcquire(&pstate->mutex);
-		state = pstate->state;
-		if (pstate->state == BM_INITIAL)
-			pstate->state = BM_INPROGRESS;
-		SpinLockRelease(&pstate->mutex);
+		state = BM_INITIAL;
+		pg_atomic_compare_exchange_u32(&pstate->state, &state, BM_INPROGRESS);
 
 		/* Exit if bitmap is done, or if we're the leader. */
 		if (state != BM_INPROGRESS)
@@ -538,9 +531,7 @@ ExecBitmapHeapInitializeDSM(BitmapHeapScanState *node,
 
 	pstate->tbmiterator = 0;
 
-	/* Initialize the mutex */
-	SpinLockInit(&pstate->mutex);
-	pstate->state = BM_INITIAL;
+	pg_atomic_init_u32(&pstate->state, BM_INITIAL);
 
 	ConditionVariableInit(&pstate->cv);
 
@@ -565,7 +556,7 @@ ExecBitmapHeapReInitializeDSM(BitmapHeapScanState *node,
 	if (dsa == NULL)
 		return;
 
-	pstate->state = BM_INITIAL;
+	pg_atomic_write_u32(&pstate->state, BM_INITIAL);
 
 	if (DsaPointerIsValid(pstate->tbmiterator))
 		tbm_free_shared_area(dsa, pstate->tbmiterator);
-- 
2.50.1 (Apple Git-155)


--Ot5x3ffkWEuxilWO
Content-Type: text/plain; charset=us-ascii
Content-Disposition: attachment;
	filename=v1-0003-convert-FixedParallelState-last_xlog_end-to-an-at.patch



^ permalink  raw  reply  [nested|flat] 440+ messages in thread

* [PATCH v1 2/8] convert ParallelBitmapHeapState->state to an atomic
@ 2026-07-09 18:38 Nathan Bossart <nathan@postgresql.org>
  0 siblings, 0 replies; 440+ messages in thread

From: Nathan Bossart @ 2026-07-09 18:38 UTC (permalink / raw)

---
 src/backend/executor/nodeBitmapHeapscan.c | 21 ++++++---------------
 1 file changed, 6 insertions(+), 15 deletions(-)

diff --git a/src/backend/executor/nodeBitmapHeapscan.c b/src/backend/executor/nodeBitmapHeapscan.c
index 83d6478bc2b..f2bb487bf10 100644
--- a/src/backend/executor/nodeBitmapHeapscan.c
+++ b/src/backend/executor/nodeBitmapHeapscan.c
@@ -79,7 +79,6 @@ typedef enum
 /* ----------------
  *	 ParallelBitmapHeapState information
  *		tbmiterator				iterator for scanning current pages
- *		mutex					mutual exclusion for state
  *		state					current state of the TIDBitmap
  *		cv						conditional wait variable
  * ----------------
@@ -87,8 +86,7 @@ typedef enum
 typedef struct ParallelBitmapHeapState
 {
 	dsa_pointer tbmiterator;
-	slock_t		mutex;
-	SharedBitmapState state;
+	pg_atomic_uint32 state;
 	ConditionVariable cv;
 } ParallelBitmapHeapState;
 
@@ -228,9 +226,7 @@ BitmapHeapNext(BitmapHeapScanState *node)
 static inline void
 BitmapDoneInitializingSharedState(ParallelBitmapHeapState *pstate)
 {
-	SpinLockAcquire(&pstate->mutex);
-	pstate->state = BM_FINISHED;
-	SpinLockRelease(&pstate->mutex);
+	pg_atomic_write_membarrier_u32(&pstate->state, BM_FINISHED);
 	ConditionVariableBroadcast(&pstate->cv);
 }
 
@@ -480,11 +476,8 @@ BitmapShouldInitializeSharedState(ParallelBitmapHeapState *pstate)
 
 	while (1)
 	{
-		SpinLockAcquire(&pstate->mutex);
-		state = pstate->state;
-		if (pstate->state == BM_INITIAL)
-			pstate->state = BM_INPROGRESS;
-		SpinLockRelease(&pstate->mutex);
+		state = BM_INITIAL;
+		pg_atomic_compare_exchange_u32(&pstate->state, &state, BM_INPROGRESS);
 
 		/* Exit if bitmap is done, or if we're the leader. */
 		if (state != BM_INPROGRESS)
@@ -538,9 +531,7 @@ ExecBitmapHeapInitializeDSM(BitmapHeapScanState *node,
 
 	pstate->tbmiterator = 0;
 
-	/* Initialize the mutex */
-	SpinLockInit(&pstate->mutex);
-	pstate->state = BM_INITIAL;
+	pg_atomic_init_u32(&pstate->state, BM_INITIAL);
 
 	ConditionVariableInit(&pstate->cv);
 
@@ -565,7 +556,7 @@ ExecBitmapHeapReInitializeDSM(BitmapHeapScanState *node,
 	if (dsa == NULL)
 		return;
 
-	pstate->state = BM_INITIAL;
+	pg_atomic_write_u32(&pstate->state, BM_INITIAL);
 
 	if (DsaPointerIsValid(pstate->tbmiterator))
 		tbm_free_shared_area(dsa, pstate->tbmiterator);
-- 
2.50.1 (Apple Git-155)


--Ot5x3ffkWEuxilWO
Content-Type: text/plain; charset=us-ascii
Content-Disposition: attachment;
	filename=v1-0003-convert-FixedParallelState-last_xlog_end-to-an-at.patch



^ permalink  raw  reply  [nested|flat] 440+ messages in thread

* [PATCH v1 2/8] convert ParallelBitmapHeapState->state to an atomic
@ 2026-07-09 18:38 Nathan Bossart <nathan@postgresql.org>
  0 siblings, 0 replies; 440+ messages in thread

From: Nathan Bossart @ 2026-07-09 18:38 UTC (permalink / raw)

---
 src/backend/executor/nodeBitmapHeapscan.c | 21 ++++++---------------
 1 file changed, 6 insertions(+), 15 deletions(-)

diff --git a/src/backend/executor/nodeBitmapHeapscan.c b/src/backend/executor/nodeBitmapHeapscan.c
index 83d6478bc2b..f2bb487bf10 100644
--- a/src/backend/executor/nodeBitmapHeapscan.c
+++ b/src/backend/executor/nodeBitmapHeapscan.c
@@ -79,7 +79,6 @@ typedef enum
 /* ----------------
  *	 ParallelBitmapHeapState information
  *		tbmiterator				iterator for scanning current pages
- *		mutex					mutual exclusion for state
  *		state					current state of the TIDBitmap
  *		cv						conditional wait variable
  * ----------------
@@ -87,8 +86,7 @@ typedef enum
 typedef struct ParallelBitmapHeapState
 {
 	dsa_pointer tbmiterator;
-	slock_t		mutex;
-	SharedBitmapState state;
+	pg_atomic_uint32 state;
 	ConditionVariable cv;
 } ParallelBitmapHeapState;
 
@@ -228,9 +226,7 @@ BitmapHeapNext(BitmapHeapScanState *node)
 static inline void
 BitmapDoneInitializingSharedState(ParallelBitmapHeapState *pstate)
 {
-	SpinLockAcquire(&pstate->mutex);
-	pstate->state = BM_FINISHED;
-	SpinLockRelease(&pstate->mutex);
+	pg_atomic_write_membarrier_u32(&pstate->state, BM_FINISHED);
 	ConditionVariableBroadcast(&pstate->cv);
 }
 
@@ -480,11 +476,8 @@ BitmapShouldInitializeSharedState(ParallelBitmapHeapState *pstate)
 
 	while (1)
 	{
-		SpinLockAcquire(&pstate->mutex);
-		state = pstate->state;
-		if (pstate->state == BM_INITIAL)
-			pstate->state = BM_INPROGRESS;
-		SpinLockRelease(&pstate->mutex);
+		state = BM_INITIAL;
+		pg_atomic_compare_exchange_u32(&pstate->state, &state, BM_INPROGRESS);
 
 		/* Exit if bitmap is done, or if we're the leader. */
 		if (state != BM_INPROGRESS)
@@ -538,9 +531,7 @@ ExecBitmapHeapInitializeDSM(BitmapHeapScanState *node,
 
 	pstate->tbmiterator = 0;
 
-	/* Initialize the mutex */
-	SpinLockInit(&pstate->mutex);
-	pstate->state = BM_INITIAL;
+	pg_atomic_init_u32(&pstate->state, BM_INITIAL);
 
 	ConditionVariableInit(&pstate->cv);
 
@@ -565,7 +556,7 @@ ExecBitmapHeapReInitializeDSM(BitmapHeapScanState *node,
 	if (dsa == NULL)
 		return;
 
-	pstate->state = BM_INITIAL;
+	pg_atomic_write_u32(&pstate->state, BM_INITIAL);
 
 	if (DsaPointerIsValid(pstate->tbmiterator))
 		tbm_free_shared_area(dsa, pstate->tbmiterator);
-- 
2.50.1 (Apple Git-155)


--Ot5x3ffkWEuxilWO
Content-Type: text/plain; charset=us-ascii
Content-Disposition: attachment;
	filename=v1-0003-convert-FixedParallelState-last_xlog_end-to-an-at.patch



^ permalink  raw  reply  [nested|flat] 440+ messages in thread

* [PATCH v1 2/8] convert ParallelBitmapHeapState->state to an atomic
@ 2026-07-09 18:38 Nathan Bossart <nathan@postgresql.org>
  0 siblings, 0 replies; 440+ messages in thread

From: Nathan Bossart @ 2026-07-09 18:38 UTC (permalink / raw)

---
 src/backend/executor/nodeBitmapHeapscan.c | 21 ++++++---------------
 1 file changed, 6 insertions(+), 15 deletions(-)

diff --git a/src/backend/executor/nodeBitmapHeapscan.c b/src/backend/executor/nodeBitmapHeapscan.c
index 83d6478bc2b..f2bb487bf10 100644
--- a/src/backend/executor/nodeBitmapHeapscan.c
+++ b/src/backend/executor/nodeBitmapHeapscan.c
@@ -79,7 +79,6 @@ typedef enum
 /* ----------------
  *	 ParallelBitmapHeapState information
  *		tbmiterator				iterator for scanning current pages
- *		mutex					mutual exclusion for state
  *		state					current state of the TIDBitmap
  *		cv						conditional wait variable
  * ----------------
@@ -87,8 +86,7 @@ typedef enum
 typedef struct ParallelBitmapHeapState
 {
 	dsa_pointer tbmiterator;
-	slock_t		mutex;
-	SharedBitmapState state;
+	pg_atomic_uint32 state;
 	ConditionVariable cv;
 } ParallelBitmapHeapState;
 
@@ -228,9 +226,7 @@ BitmapHeapNext(BitmapHeapScanState *node)
 static inline void
 BitmapDoneInitializingSharedState(ParallelBitmapHeapState *pstate)
 {
-	SpinLockAcquire(&pstate->mutex);
-	pstate->state = BM_FINISHED;
-	SpinLockRelease(&pstate->mutex);
+	pg_atomic_write_membarrier_u32(&pstate->state, BM_FINISHED);
 	ConditionVariableBroadcast(&pstate->cv);
 }
 
@@ -480,11 +476,8 @@ BitmapShouldInitializeSharedState(ParallelBitmapHeapState *pstate)
 
 	while (1)
 	{
-		SpinLockAcquire(&pstate->mutex);
-		state = pstate->state;
-		if (pstate->state == BM_INITIAL)
-			pstate->state = BM_INPROGRESS;
-		SpinLockRelease(&pstate->mutex);
+		state = BM_INITIAL;
+		pg_atomic_compare_exchange_u32(&pstate->state, &state, BM_INPROGRESS);
 
 		/* Exit if bitmap is done, or if we're the leader. */
 		if (state != BM_INPROGRESS)
@@ -538,9 +531,7 @@ ExecBitmapHeapInitializeDSM(BitmapHeapScanState *node,
 
 	pstate->tbmiterator = 0;
 
-	/* Initialize the mutex */
-	SpinLockInit(&pstate->mutex);
-	pstate->state = BM_INITIAL;
+	pg_atomic_init_u32(&pstate->state, BM_INITIAL);
 
 	ConditionVariableInit(&pstate->cv);
 
@@ -565,7 +556,7 @@ ExecBitmapHeapReInitializeDSM(BitmapHeapScanState *node,
 	if (dsa == NULL)
 		return;
 
-	pstate->state = BM_INITIAL;
+	pg_atomic_write_u32(&pstate->state, BM_INITIAL);
 
 	if (DsaPointerIsValid(pstate->tbmiterator))
 		tbm_free_shared_area(dsa, pstate->tbmiterator);
-- 
2.50.1 (Apple Git-155)


--Ot5x3ffkWEuxilWO
Content-Type: text/plain; charset=us-ascii
Content-Disposition: attachment;
	filename=v1-0003-convert-FixedParallelState-last_xlog_end-to-an-at.patch



^ permalink  raw  reply  [nested|flat] 440+ messages in thread

* [PATCH v1 2/8] convert ParallelBitmapHeapState->state to an atomic
@ 2026-07-09 18:38 Nathan Bossart <nathan@postgresql.org>
  0 siblings, 0 replies; 440+ messages in thread

From: Nathan Bossart @ 2026-07-09 18:38 UTC (permalink / raw)

---
 src/backend/executor/nodeBitmapHeapscan.c | 21 ++++++---------------
 1 file changed, 6 insertions(+), 15 deletions(-)

diff --git a/src/backend/executor/nodeBitmapHeapscan.c b/src/backend/executor/nodeBitmapHeapscan.c
index 83d6478bc2b..f2bb487bf10 100644
--- a/src/backend/executor/nodeBitmapHeapscan.c
+++ b/src/backend/executor/nodeBitmapHeapscan.c
@@ -79,7 +79,6 @@ typedef enum
 /* ----------------
  *	 ParallelBitmapHeapState information
  *		tbmiterator				iterator for scanning current pages
- *		mutex					mutual exclusion for state
  *		state					current state of the TIDBitmap
  *		cv						conditional wait variable
  * ----------------
@@ -87,8 +86,7 @@ typedef enum
 typedef struct ParallelBitmapHeapState
 {
 	dsa_pointer tbmiterator;
-	slock_t		mutex;
-	SharedBitmapState state;
+	pg_atomic_uint32 state;
 	ConditionVariable cv;
 } ParallelBitmapHeapState;
 
@@ -228,9 +226,7 @@ BitmapHeapNext(BitmapHeapScanState *node)
 static inline void
 BitmapDoneInitializingSharedState(ParallelBitmapHeapState *pstate)
 {
-	SpinLockAcquire(&pstate->mutex);
-	pstate->state = BM_FINISHED;
-	SpinLockRelease(&pstate->mutex);
+	pg_atomic_write_membarrier_u32(&pstate->state, BM_FINISHED);
 	ConditionVariableBroadcast(&pstate->cv);
 }
 
@@ -480,11 +476,8 @@ BitmapShouldInitializeSharedState(ParallelBitmapHeapState *pstate)
 
 	while (1)
 	{
-		SpinLockAcquire(&pstate->mutex);
-		state = pstate->state;
-		if (pstate->state == BM_INITIAL)
-			pstate->state = BM_INPROGRESS;
-		SpinLockRelease(&pstate->mutex);
+		state = BM_INITIAL;
+		pg_atomic_compare_exchange_u32(&pstate->state, &state, BM_INPROGRESS);
 
 		/* Exit if bitmap is done, or if we're the leader. */
 		if (state != BM_INPROGRESS)
@@ -538,9 +531,7 @@ ExecBitmapHeapInitializeDSM(BitmapHeapScanState *node,
 
 	pstate->tbmiterator = 0;
 
-	/* Initialize the mutex */
-	SpinLockInit(&pstate->mutex);
-	pstate->state = BM_INITIAL;
+	pg_atomic_init_u32(&pstate->state, BM_INITIAL);
 
 	ConditionVariableInit(&pstate->cv);
 
@@ -565,7 +556,7 @@ ExecBitmapHeapReInitializeDSM(BitmapHeapScanState *node,
 	if (dsa == NULL)
 		return;
 
-	pstate->state = BM_INITIAL;
+	pg_atomic_write_u32(&pstate->state, BM_INITIAL);
 
 	if (DsaPointerIsValid(pstate->tbmiterator))
 		tbm_free_shared_area(dsa, pstate->tbmiterator);
-- 
2.50.1 (Apple Git-155)


--Ot5x3ffkWEuxilWO
Content-Type: text/plain; charset=us-ascii
Content-Disposition: attachment;
	filename=v1-0003-convert-FixedParallelState-last_xlog_end-to-an-at.patch



^ permalink  raw  reply  [nested|flat] 440+ messages in thread

* [PATCH v2 2/9] convert ParallelBitmapHeapState->state to an atomic
@ 2026-07-09 18:38 Nathan Bossart <nathan@postgresql.org>
  0 siblings, 0 replies; 440+ messages in thread

From: Nathan Bossart @ 2026-07-09 18:38 UTC (permalink / raw)

---
 src/backend/executor/nodeBitmapHeapscan.c | 23 +++++++----------------
 1 file changed, 7 insertions(+), 16 deletions(-)

diff --git a/src/backend/executor/nodeBitmapHeapscan.c b/src/backend/executor/nodeBitmapHeapscan.c
index 83d6478bc2b..a9e83f30687 100644
--- a/src/backend/executor/nodeBitmapHeapscan.c
+++ b/src/backend/executor/nodeBitmapHeapscan.c
@@ -79,7 +79,6 @@ typedef enum
 /* ----------------
  *	 ParallelBitmapHeapState information
  *		tbmiterator				iterator for scanning current pages
- *		mutex					mutual exclusion for state
  *		state					current state of the TIDBitmap
  *		cv						conditional wait variable
  * ----------------
@@ -87,8 +86,7 @@ typedef enum
 typedef struct ParallelBitmapHeapState
 {
 	dsa_pointer tbmiterator;
-	slock_t		mutex;
-	SharedBitmapState state;
+	pg_atomic_uint32 state;
 	ConditionVariable cv;
 } ParallelBitmapHeapState;
 
@@ -228,9 +226,7 @@ BitmapHeapNext(BitmapHeapScanState *node)
 static inline void
 BitmapDoneInitializingSharedState(ParallelBitmapHeapState *pstate)
 {
-	SpinLockAcquire(&pstate->mutex);
-	pstate->state = BM_FINISHED;
-	SpinLockRelease(&pstate->mutex);
+	pg_atomic_write_membarrier_u32(&pstate->state, BM_FINISHED);
 	ConditionVariableBroadcast(&pstate->cv);
 }
 
@@ -476,15 +472,12 @@ ExecInitBitmapHeapScan(BitmapHeapScan *node, EState *estate, int eflags)
 static bool
 BitmapShouldInitializeSharedState(ParallelBitmapHeapState *pstate)
 {
-	SharedBitmapState state;
+	uint32		state;
 
 	while (1)
 	{
-		SpinLockAcquire(&pstate->mutex);
-		state = pstate->state;
-		if (pstate->state == BM_INITIAL)
-			pstate->state = BM_INPROGRESS;
-		SpinLockRelease(&pstate->mutex);
+		state = BM_INITIAL;
+		pg_atomic_compare_exchange_u32(&pstate->state, &state, BM_INPROGRESS);
 
 		/* Exit if bitmap is done, or if we're the leader. */
 		if (state != BM_INPROGRESS)
@@ -538,9 +531,7 @@ ExecBitmapHeapInitializeDSM(BitmapHeapScanState *node,
 
 	pstate->tbmiterator = 0;
 
-	/* Initialize the mutex */
-	SpinLockInit(&pstate->mutex);
-	pstate->state = BM_INITIAL;
+	pg_atomic_init_u32(&pstate->state, BM_INITIAL);
 
 	ConditionVariableInit(&pstate->cv);
 
@@ -565,7 +556,7 @@ ExecBitmapHeapReInitializeDSM(BitmapHeapScanState *node,
 	if (dsa == NULL)
 		return;
 
-	pstate->state = BM_INITIAL;
+	pg_atomic_write_u32(&pstate->state, BM_INITIAL);
 
 	if (DsaPointerIsValid(pstate->tbmiterator))
 		tbm_free_shared_area(dsa, pstate->tbmiterator);
-- 
2.50.1 (Apple Git-155)


--Xf36GNcW+0xZNily
Content-Type: text/plain; charset=us-ascii
Content-Disposition: attachment;
	filename=v2-0003-convert-FixedParallelState-last_xlog_end-to-an-at.patch



^ permalink  raw  reply  [nested|flat] 440+ messages in thread

* [PATCH v1 2/8] convert ParallelBitmapHeapState->state to an atomic
@ 2026-07-09 18:38 Nathan Bossart <nathan@postgresql.org>
  0 siblings, 0 replies; 440+ messages in thread

From: Nathan Bossart @ 2026-07-09 18:38 UTC (permalink / raw)

---
 src/backend/executor/nodeBitmapHeapscan.c | 21 ++++++---------------
 1 file changed, 6 insertions(+), 15 deletions(-)

diff --git a/src/backend/executor/nodeBitmapHeapscan.c b/src/backend/executor/nodeBitmapHeapscan.c
index 83d6478bc2b..f2bb487bf10 100644
--- a/src/backend/executor/nodeBitmapHeapscan.c
+++ b/src/backend/executor/nodeBitmapHeapscan.c
@@ -79,7 +79,6 @@ typedef enum
 /* ----------------
  *	 ParallelBitmapHeapState information
  *		tbmiterator				iterator for scanning current pages
- *		mutex					mutual exclusion for state
  *		state					current state of the TIDBitmap
  *		cv						conditional wait variable
  * ----------------
@@ -87,8 +86,7 @@ typedef enum
 typedef struct ParallelBitmapHeapState
 {
 	dsa_pointer tbmiterator;
-	slock_t		mutex;
-	SharedBitmapState state;
+	pg_atomic_uint32 state;
 	ConditionVariable cv;
 } ParallelBitmapHeapState;
 
@@ -228,9 +226,7 @@ BitmapHeapNext(BitmapHeapScanState *node)
 static inline void
 BitmapDoneInitializingSharedState(ParallelBitmapHeapState *pstate)
 {
-	SpinLockAcquire(&pstate->mutex);
-	pstate->state = BM_FINISHED;
-	SpinLockRelease(&pstate->mutex);
+	pg_atomic_write_membarrier_u32(&pstate->state, BM_FINISHED);
 	ConditionVariableBroadcast(&pstate->cv);
 }
 
@@ -480,11 +476,8 @@ BitmapShouldInitializeSharedState(ParallelBitmapHeapState *pstate)
 
 	while (1)
 	{
-		SpinLockAcquire(&pstate->mutex);
-		state = pstate->state;
-		if (pstate->state == BM_INITIAL)
-			pstate->state = BM_INPROGRESS;
-		SpinLockRelease(&pstate->mutex);
+		state = BM_INITIAL;
+		pg_atomic_compare_exchange_u32(&pstate->state, &state, BM_INPROGRESS);
 
 		/* Exit if bitmap is done, or if we're the leader. */
 		if (state != BM_INPROGRESS)
@@ -538,9 +531,7 @@ ExecBitmapHeapInitializeDSM(BitmapHeapScanState *node,
 
 	pstate->tbmiterator = 0;
 
-	/* Initialize the mutex */
-	SpinLockInit(&pstate->mutex);
-	pstate->state = BM_INITIAL;
+	pg_atomic_init_u32(&pstate->state, BM_INITIAL);
 
 	ConditionVariableInit(&pstate->cv);
 
@@ -565,7 +556,7 @@ ExecBitmapHeapReInitializeDSM(BitmapHeapScanState *node,
 	if (dsa == NULL)
 		return;
 
-	pstate->state = BM_INITIAL;
+	pg_atomic_write_u32(&pstate->state, BM_INITIAL);
 
 	if (DsaPointerIsValid(pstate->tbmiterator))
 		tbm_free_shared_area(dsa, pstate->tbmiterator);
-- 
2.50.1 (Apple Git-155)


--Ot5x3ffkWEuxilWO
Content-Type: text/plain; charset=us-ascii
Content-Disposition: attachment;
	filename=v1-0003-convert-FixedParallelState-last_xlog_end-to-an-at.patch



^ permalink  raw  reply  [nested|flat] 440+ messages in thread

* [PATCH v1 2/8] convert ParallelBitmapHeapState->state to an atomic
@ 2026-07-09 18:38 Nathan Bossart <nathan@postgresql.org>
  0 siblings, 0 replies; 440+ messages in thread

From: Nathan Bossart @ 2026-07-09 18:38 UTC (permalink / raw)

---
 src/backend/executor/nodeBitmapHeapscan.c | 21 ++++++---------------
 1 file changed, 6 insertions(+), 15 deletions(-)

diff --git a/src/backend/executor/nodeBitmapHeapscan.c b/src/backend/executor/nodeBitmapHeapscan.c
index 83d6478bc2b..f2bb487bf10 100644
--- a/src/backend/executor/nodeBitmapHeapscan.c
+++ b/src/backend/executor/nodeBitmapHeapscan.c
@@ -79,7 +79,6 @@ typedef enum
 /* ----------------
  *	 ParallelBitmapHeapState information
  *		tbmiterator				iterator for scanning current pages
- *		mutex					mutual exclusion for state
  *		state					current state of the TIDBitmap
  *		cv						conditional wait variable
  * ----------------
@@ -87,8 +86,7 @@ typedef enum
 typedef struct ParallelBitmapHeapState
 {
 	dsa_pointer tbmiterator;
-	slock_t		mutex;
-	SharedBitmapState state;
+	pg_atomic_uint32 state;
 	ConditionVariable cv;
 } ParallelBitmapHeapState;
 
@@ -228,9 +226,7 @@ BitmapHeapNext(BitmapHeapScanState *node)
 static inline void
 BitmapDoneInitializingSharedState(ParallelBitmapHeapState *pstate)
 {
-	SpinLockAcquire(&pstate->mutex);
-	pstate->state = BM_FINISHED;
-	SpinLockRelease(&pstate->mutex);
+	pg_atomic_write_membarrier_u32(&pstate->state, BM_FINISHED);
 	ConditionVariableBroadcast(&pstate->cv);
 }
 
@@ -480,11 +476,8 @@ BitmapShouldInitializeSharedState(ParallelBitmapHeapState *pstate)
 
 	while (1)
 	{
-		SpinLockAcquire(&pstate->mutex);
-		state = pstate->state;
-		if (pstate->state == BM_INITIAL)
-			pstate->state = BM_INPROGRESS;
-		SpinLockRelease(&pstate->mutex);
+		state = BM_INITIAL;
+		pg_atomic_compare_exchange_u32(&pstate->state, &state, BM_INPROGRESS);
 
 		/* Exit if bitmap is done, or if we're the leader. */
 		if (state != BM_INPROGRESS)
@@ -538,9 +531,7 @@ ExecBitmapHeapInitializeDSM(BitmapHeapScanState *node,
 
 	pstate->tbmiterator = 0;
 
-	/* Initialize the mutex */
-	SpinLockInit(&pstate->mutex);
-	pstate->state = BM_INITIAL;
+	pg_atomic_init_u32(&pstate->state, BM_INITIAL);
 
 	ConditionVariableInit(&pstate->cv);
 
@@ -565,7 +556,7 @@ ExecBitmapHeapReInitializeDSM(BitmapHeapScanState *node,
 	if (dsa == NULL)
 		return;
 
-	pstate->state = BM_INITIAL;
+	pg_atomic_write_u32(&pstate->state, BM_INITIAL);
 
 	if (DsaPointerIsValid(pstate->tbmiterator))
 		tbm_free_shared_area(dsa, pstate->tbmiterator);
-- 
2.50.1 (Apple Git-155)


--Ot5x3ffkWEuxilWO
Content-Type: text/plain; charset=us-ascii
Content-Disposition: attachment;
	filename=v1-0003-convert-FixedParallelState-last_xlog_end-to-an-at.patch



^ permalink  raw  reply  [nested|flat] 440+ messages in thread

* [PATCH v2 2/9] convert ParallelBitmapHeapState->state to an atomic
@ 2026-07-09 18:38 Nathan Bossart <nathan@postgresql.org>
  0 siblings, 0 replies; 440+ messages in thread

From: Nathan Bossart @ 2026-07-09 18:38 UTC (permalink / raw)

---
 src/backend/executor/nodeBitmapHeapscan.c | 23 +++++++----------------
 1 file changed, 7 insertions(+), 16 deletions(-)

diff --git a/src/backend/executor/nodeBitmapHeapscan.c b/src/backend/executor/nodeBitmapHeapscan.c
index 83d6478bc2b..a9e83f30687 100644
--- a/src/backend/executor/nodeBitmapHeapscan.c
+++ b/src/backend/executor/nodeBitmapHeapscan.c
@@ -79,7 +79,6 @@ typedef enum
 /* ----------------
  *	 ParallelBitmapHeapState information
  *		tbmiterator				iterator for scanning current pages
- *		mutex					mutual exclusion for state
  *		state					current state of the TIDBitmap
  *		cv						conditional wait variable
  * ----------------
@@ -87,8 +86,7 @@ typedef enum
 typedef struct ParallelBitmapHeapState
 {
 	dsa_pointer tbmiterator;
-	slock_t		mutex;
-	SharedBitmapState state;
+	pg_atomic_uint32 state;
 	ConditionVariable cv;
 } ParallelBitmapHeapState;
 
@@ -228,9 +226,7 @@ BitmapHeapNext(BitmapHeapScanState *node)
 static inline void
 BitmapDoneInitializingSharedState(ParallelBitmapHeapState *pstate)
 {
-	SpinLockAcquire(&pstate->mutex);
-	pstate->state = BM_FINISHED;
-	SpinLockRelease(&pstate->mutex);
+	pg_atomic_write_membarrier_u32(&pstate->state, BM_FINISHED);
 	ConditionVariableBroadcast(&pstate->cv);
 }
 
@@ -476,15 +472,12 @@ ExecInitBitmapHeapScan(BitmapHeapScan *node, EState *estate, int eflags)
 static bool
 BitmapShouldInitializeSharedState(ParallelBitmapHeapState *pstate)
 {
-	SharedBitmapState state;
+	uint32		state;
 
 	while (1)
 	{
-		SpinLockAcquire(&pstate->mutex);
-		state = pstate->state;
-		if (pstate->state == BM_INITIAL)
-			pstate->state = BM_INPROGRESS;
-		SpinLockRelease(&pstate->mutex);
+		state = BM_INITIAL;
+		pg_atomic_compare_exchange_u32(&pstate->state, &state, BM_INPROGRESS);
 
 		/* Exit if bitmap is done, or if we're the leader. */
 		if (state != BM_INPROGRESS)
@@ -538,9 +531,7 @@ ExecBitmapHeapInitializeDSM(BitmapHeapScanState *node,
 
 	pstate->tbmiterator = 0;
 
-	/* Initialize the mutex */
-	SpinLockInit(&pstate->mutex);
-	pstate->state = BM_INITIAL;
+	pg_atomic_init_u32(&pstate->state, BM_INITIAL);
 
 	ConditionVariableInit(&pstate->cv);
 
@@ -565,7 +556,7 @@ ExecBitmapHeapReInitializeDSM(BitmapHeapScanState *node,
 	if (dsa == NULL)
 		return;
 
-	pstate->state = BM_INITIAL;
+	pg_atomic_write_u32(&pstate->state, BM_INITIAL);
 
 	if (DsaPointerIsValid(pstate->tbmiterator))
 		tbm_free_shared_area(dsa, pstate->tbmiterator);
-- 
2.50.1 (Apple Git-155)


--Xf36GNcW+0xZNily
Content-Type: text/plain; charset=us-ascii
Content-Disposition: attachment;
	filename=v2-0003-convert-FixedParallelState-last_xlog_end-to-an-at.patch



^ permalink  raw  reply  [nested|flat] 440+ messages in thread

* [PATCH v1 2/8] convert ParallelBitmapHeapState->state to an atomic
@ 2026-07-09 18:38 Nathan Bossart <nathan@postgresql.org>
  0 siblings, 0 replies; 440+ messages in thread

From: Nathan Bossart @ 2026-07-09 18:38 UTC (permalink / raw)

---
 src/backend/executor/nodeBitmapHeapscan.c | 21 ++++++---------------
 1 file changed, 6 insertions(+), 15 deletions(-)

diff --git a/src/backend/executor/nodeBitmapHeapscan.c b/src/backend/executor/nodeBitmapHeapscan.c
index 83d6478bc2b..f2bb487bf10 100644
--- a/src/backend/executor/nodeBitmapHeapscan.c
+++ b/src/backend/executor/nodeBitmapHeapscan.c
@@ -79,7 +79,6 @@ typedef enum
 /* ----------------
  *	 ParallelBitmapHeapState information
  *		tbmiterator				iterator for scanning current pages
- *		mutex					mutual exclusion for state
  *		state					current state of the TIDBitmap
  *		cv						conditional wait variable
  * ----------------
@@ -87,8 +86,7 @@ typedef enum
 typedef struct ParallelBitmapHeapState
 {
 	dsa_pointer tbmiterator;
-	slock_t		mutex;
-	SharedBitmapState state;
+	pg_atomic_uint32 state;
 	ConditionVariable cv;
 } ParallelBitmapHeapState;
 
@@ -228,9 +226,7 @@ BitmapHeapNext(BitmapHeapScanState *node)
 static inline void
 BitmapDoneInitializingSharedState(ParallelBitmapHeapState *pstate)
 {
-	SpinLockAcquire(&pstate->mutex);
-	pstate->state = BM_FINISHED;
-	SpinLockRelease(&pstate->mutex);
+	pg_atomic_write_membarrier_u32(&pstate->state, BM_FINISHED);
 	ConditionVariableBroadcast(&pstate->cv);
 }
 
@@ -480,11 +476,8 @@ BitmapShouldInitializeSharedState(ParallelBitmapHeapState *pstate)
 
 	while (1)
 	{
-		SpinLockAcquire(&pstate->mutex);
-		state = pstate->state;
-		if (pstate->state == BM_INITIAL)
-			pstate->state = BM_INPROGRESS;
-		SpinLockRelease(&pstate->mutex);
+		state = BM_INITIAL;
+		pg_atomic_compare_exchange_u32(&pstate->state, &state, BM_INPROGRESS);
 
 		/* Exit if bitmap is done, or if we're the leader. */
 		if (state != BM_INPROGRESS)
@@ -538,9 +531,7 @@ ExecBitmapHeapInitializeDSM(BitmapHeapScanState *node,
 
 	pstate->tbmiterator = 0;
 
-	/* Initialize the mutex */
-	SpinLockInit(&pstate->mutex);
-	pstate->state = BM_INITIAL;
+	pg_atomic_init_u32(&pstate->state, BM_INITIAL);
 
 	ConditionVariableInit(&pstate->cv);
 
@@ -565,7 +556,7 @@ ExecBitmapHeapReInitializeDSM(BitmapHeapScanState *node,
 	if (dsa == NULL)
 		return;
 
-	pstate->state = BM_INITIAL;
+	pg_atomic_write_u32(&pstate->state, BM_INITIAL);
 
 	if (DsaPointerIsValid(pstate->tbmiterator))
 		tbm_free_shared_area(dsa, pstate->tbmiterator);
-- 
2.50.1 (Apple Git-155)


--Ot5x3ffkWEuxilWO
Content-Type: text/plain; charset=us-ascii
Content-Disposition: attachment;
	filename=v1-0003-convert-FixedParallelState-last_xlog_end-to-an-at.patch



^ permalink  raw  reply  [nested|flat] 440+ messages in thread

* [PATCH v1 2/8] convert ParallelBitmapHeapState->state to an atomic
@ 2026-07-09 18:38 Nathan Bossart <nathan@postgresql.org>
  0 siblings, 0 replies; 440+ messages in thread

From: Nathan Bossart @ 2026-07-09 18:38 UTC (permalink / raw)

---
 src/backend/executor/nodeBitmapHeapscan.c | 21 ++++++---------------
 1 file changed, 6 insertions(+), 15 deletions(-)

diff --git a/src/backend/executor/nodeBitmapHeapscan.c b/src/backend/executor/nodeBitmapHeapscan.c
index 83d6478bc2b..f2bb487bf10 100644
--- a/src/backend/executor/nodeBitmapHeapscan.c
+++ b/src/backend/executor/nodeBitmapHeapscan.c
@@ -79,7 +79,6 @@ typedef enum
 /* ----------------
  *	 ParallelBitmapHeapState information
  *		tbmiterator				iterator for scanning current pages
- *		mutex					mutual exclusion for state
  *		state					current state of the TIDBitmap
  *		cv						conditional wait variable
  * ----------------
@@ -87,8 +86,7 @@ typedef enum
 typedef struct ParallelBitmapHeapState
 {
 	dsa_pointer tbmiterator;
-	slock_t		mutex;
-	SharedBitmapState state;
+	pg_atomic_uint32 state;
 	ConditionVariable cv;
 } ParallelBitmapHeapState;
 
@@ -228,9 +226,7 @@ BitmapHeapNext(BitmapHeapScanState *node)
 static inline void
 BitmapDoneInitializingSharedState(ParallelBitmapHeapState *pstate)
 {
-	SpinLockAcquire(&pstate->mutex);
-	pstate->state = BM_FINISHED;
-	SpinLockRelease(&pstate->mutex);
+	pg_atomic_write_membarrier_u32(&pstate->state, BM_FINISHED);
 	ConditionVariableBroadcast(&pstate->cv);
 }
 
@@ -480,11 +476,8 @@ BitmapShouldInitializeSharedState(ParallelBitmapHeapState *pstate)
 
 	while (1)
 	{
-		SpinLockAcquire(&pstate->mutex);
-		state = pstate->state;
-		if (pstate->state == BM_INITIAL)
-			pstate->state = BM_INPROGRESS;
-		SpinLockRelease(&pstate->mutex);
+		state = BM_INITIAL;
+		pg_atomic_compare_exchange_u32(&pstate->state, &state, BM_INPROGRESS);
 
 		/* Exit if bitmap is done, or if we're the leader. */
 		if (state != BM_INPROGRESS)
@@ -538,9 +531,7 @@ ExecBitmapHeapInitializeDSM(BitmapHeapScanState *node,
 
 	pstate->tbmiterator = 0;
 
-	/* Initialize the mutex */
-	SpinLockInit(&pstate->mutex);
-	pstate->state = BM_INITIAL;
+	pg_atomic_init_u32(&pstate->state, BM_INITIAL);
 
 	ConditionVariableInit(&pstate->cv);
 
@@ -565,7 +556,7 @@ ExecBitmapHeapReInitializeDSM(BitmapHeapScanState *node,
 	if (dsa == NULL)
 		return;
 
-	pstate->state = BM_INITIAL;
+	pg_atomic_write_u32(&pstate->state, BM_INITIAL);
 
 	if (DsaPointerIsValid(pstate->tbmiterator))
 		tbm_free_shared_area(dsa, pstate->tbmiterator);
-- 
2.50.1 (Apple Git-155)


--Ot5x3ffkWEuxilWO
Content-Type: text/plain; charset=us-ascii
Content-Disposition: attachment;
	filename=v1-0003-convert-FixedParallelState-last_xlog_end-to-an-at.patch



^ permalink  raw  reply  [nested|flat] 440+ messages in thread

* [PATCH v1 2/8] convert ParallelBitmapHeapState->state to an atomic
@ 2026-07-09 18:38 Nathan Bossart <nathan@postgresql.org>
  0 siblings, 0 replies; 440+ messages in thread

From: Nathan Bossart @ 2026-07-09 18:38 UTC (permalink / raw)

---
 src/backend/executor/nodeBitmapHeapscan.c | 21 ++++++---------------
 1 file changed, 6 insertions(+), 15 deletions(-)

diff --git a/src/backend/executor/nodeBitmapHeapscan.c b/src/backend/executor/nodeBitmapHeapscan.c
index 83d6478bc2b..f2bb487bf10 100644
--- a/src/backend/executor/nodeBitmapHeapscan.c
+++ b/src/backend/executor/nodeBitmapHeapscan.c
@@ -79,7 +79,6 @@ typedef enum
 /* ----------------
  *	 ParallelBitmapHeapState information
  *		tbmiterator				iterator for scanning current pages
- *		mutex					mutual exclusion for state
  *		state					current state of the TIDBitmap
  *		cv						conditional wait variable
  * ----------------
@@ -87,8 +86,7 @@ typedef enum
 typedef struct ParallelBitmapHeapState
 {
 	dsa_pointer tbmiterator;
-	slock_t		mutex;
-	SharedBitmapState state;
+	pg_atomic_uint32 state;
 	ConditionVariable cv;
 } ParallelBitmapHeapState;
 
@@ -228,9 +226,7 @@ BitmapHeapNext(BitmapHeapScanState *node)
 static inline void
 BitmapDoneInitializingSharedState(ParallelBitmapHeapState *pstate)
 {
-	SpinLockAcquire(&pstate->mutex);
-	pstate->state = BM_FINISHED;
-	SpinLockRelease(&pstate->mutex);
+	pg_atomic_write_membarrier_u32(&pstate->state, BM_FINISHED);
 	ConditionVariableBroadcast(&pstate->cv);
 }
 
@@ -480,11 +476,8 @@ BitmapShouldInitializeSharedState(ParallelBitmapHeapState *pstate)
 
 	while (1)
 	{
-		SpinLockAcquire(&pstate->mutex);
-		state = pstate->state;
-		if (pstate->state == BM_INITIAL)
-			pstate->state = BM_INPROGRESS;
-		SpinLockRelease(&pstate->mutex);
+		state = BM_INITIAL;
+		pg_atomic_compare_exchange_u32(&pstate->state, &state, BM_INPROGRESS);
 
 		/* Exit if bitmap is done, or if we're the leader. */
 		if (state != BM_INPROGRESS)
@@ -538,9 +531,7 @@ ExecBitmapHeapInitializeDSM(BitmapHeapScanState *node,
 
 	pstate->tbmiterator = 0;
 
-	/* Initialize the mutex */
-	SpinLockInit(&pstate->mutex);
-	pstate->state = BM_INITIAL;
+	pg_atomic_init_u32(&pstate->state, BM_INITIAL);
 
 	ConditionVariableInit(&pstate->cv);
 
@@ -565,7 +556,7 @@ ExecBitmapHeapReInitializeDSM(BitmapHeapScanState *node,
 	if (dsa == NULL)
 		return;
 
-	pstate->state = BM_INITIAL;
+	pg_atomic_write_u32(&pstate->state, BM_INITIAL);
 
 	if (DsaPointerIsValid(pstate->tbmiterator))
 		tbm_free_shared_area(dsa, pstate->tbmiterator);
-- 
2.50.1 (Apple Git-155)


--Ot5x3ffkWEuxilWO
Content-Type: text/plain; charset=us-ascii
Content-Disposition: attachment;
	filename=v1-0003-convert-FixedParallelState-last_xlog_end-to-an-at.patch



^ permalink  raw  reply  [nested|flat] 440+ messages in thread

* [PATCH v1 2/8] convert ParallelBitmapHeapState->state to an atomic
@ 2026-07-09 18:38 Nathan Bossart <nathan@postgresql.org>
  0 siblings, 0 replies; 440+ messages in thread

From: Nathan Bossart @ 2026-07-09 18:38 UTC (permalink / raw)

---
 src/backend/executor/nodeBitmapHeapscan.c | 21 ++++++---------------
 1 file changed, 6 insertions(+), 15 deletions(-)

diff --git a/src/backend/executor/nodeBitmapHeapscan.c b/src/backend/executor/nodeBitmapHeapscan.c
index 83d6478bc2b..f2bb487bf10 100644
--- a/src/backend/executor/nodeBitmapHeapscan.c
+++ b/src/backend/executor/nodeBitmapHeapscan.c
@@ -79,7 +79,6 @@ typedef enum
 /* ----------------
  *	 ParallelBitmapHeapState information
  *		tbmiterator				iterator for scanning current pages
- *		mutex					mutual exclusion for state
  *		state					current state of the TIDBitmap
  *		cv						conditional wait variable
  * ----------------
@@ -87,8 +86,7 @@ typedef enum
 typedef struct ParallelBitmapHeapState
 {
 	dsa_pointer tbmiterator;
-	slock_t		mutex;
-	SharedBitmapState state;
+	pg_atomic_uint32 state;
 	ConditionVariable cv;
 } ParallelBitmapHeapState;
 
@@ -228,9 +226,7 @@ BitmapHeapNext(BitmapHeapScanState *node)
 static inline void
 BitmapDoneInitializingSharedState(ParallelBitmapHeapState *pstate)
 {
-	SpinLockAcquire(&pstate->mutex);
-	pstate->state = BM_FINISHED;
-	SpinLockRelease(&pstate->mutex);
+	pg_atomic_write_membarrier_u32(&pstate->state, BM_FINISHED);
 	ConditionVariableBroadcast(&pstate->cv);
 }
 
@@ -480,11 +476,8 @@ BitmapShouldInitializeSharedState(ParallelBitmapHeapState *pstate)
 
 	while (1)
 	{
-		SpinLockAcquire(&pstate->mutex);
-		state = pstate->state;
-		if (pstate->state == BM_INITIAL)
-			pstate->state = BM_INPROGRESS;
-		SpinLockRelease(&pstate->mutex);
+		state = BM_INITIAL;
+		pg_atomic_compare_exchange_u32(&pstate->state, &state, BM_INPROGRESS);
 
 		/* Exit if bitmap is done, or if we're the leader. */
 		if (state != BM_INPROGRESS)
@@ -538,9 +531,7 @@ ExecBitmapHeapInitializeDSM(BitmapHeapScanState *node,
 
 	pstate->tbmiterator = 0;
 
-	/* Initialize the mutex */
-	SpinLockInit(&pstate->mutex);
-	pstate->state = BM_INITIAL;
+	pg_atomic_init_u32(&pstate->state, BM_INITIAL);
 
 	ConditionVariableInit(&pstate->cv);
 
@@ -565,7 +556,7 @@ ExecBitmapHeapReInitializeDSM(BitmapHeapScanState *node,
 	if (dsa == NULL)
 		return;
 
-	pstate->state = BM_INITIAL;
+	pg_atomic_write_u32(&pstate->state, BM_INITIAL);
 
 	if (DsaPointerIsValid(pstate->tbmiterator))
 		tbm_free_shared_area(dsa, pstate->tbmiterator);
-- 
2.50.1 (Apple Git-155)


--Ot5x3ffkWEuxilWO
Content-Type: text/plain; charset=us-ascii
Content-Disposition: attachment;
	filename=v1-0003-convert-FixedParallelState-last_xlog_end-to-an-at.patch



^ permalink  raw  reply  [nested|flat] 440+ messages in thread

* [PATCH v1 2/8] convert ParallelBitmapHeapState->state to an atomic
@ 2026-07-09 18:38 Nathan Bossart <nathan@postgresql.org>
  0 siblings, 0 replies; 440+ messages in thread

From: Nathan Bossart @ 2026-07-09 18:38 UTC (permalink / raw)

---
 src/backend/executor/nodeBitmapHeapscan.c | 21 ++++++---------------
 1 file changed, 6 insertions(+), 15 deletions(-)

diff --git a/src/backend/executor/nodeBitmapHeapscan.c b/src/backend/executor/nodeBitmapHeapscan.c
index 83d6478bc2b..f2bb487bf10 100644
--- a/src/backend/executor/nodeBitmapHeapscan.c
+++ b/src/backend/executor/nodeBitmapHeapscan.c
@@ -79,7 +79,6 @@ typedef enum
 /* ----------------
  *	 ParallelBitmapHeapState information
  *		tbmiterator				iterator for scanning current pages
- *		mutex					mutual exclusion for state
  *		state					current state of the TIDBitmap
  *		cv						conditional wait variable
  * ----------------
@@ -87,8 +86,7 @@ typedef enum
 typedef struct ParallelBitmapHeapState
 {
 	dsa_pointer tbmiterator;
-	slock_t		mutex;
-	SharedBitmapState state;
+	pg_atomic_uint32 state;
 	ConditionVariable cv;
 } ParallelBitmapHeapState;
 
@@ -228,9 +226,7 @@ BitmapHeapNext(BitmapHeapScanState *node)
 static inline void
 BitmapDoneInitializingSharedState(ParallelBitmapHeapState *pstate)
 {
-	SpinLockAcquire(&pstate->mutex);
-	pstate->state = BM_FINISHED;
-	SpinLockRelease(&pstate->mutex);
+	pg_atomic_write_membarrier_u32(&pstate->state, BM_FINISHED);
 	ConditionVariableBroadcast(&pstate->cv);
 }
 
@@ -480,11 +476,8 @@ BitmapShouldInitializeSharedState(ParallelBitmapHeapState *pstate)
 
 	while (1)
 	{
-		SpinLockAcquire(&pstate->mutex);
-		state = pstate->state;
-		if (pstate->state == BM_INITIAL)
-			pstate->state = BM_INPROGRESS;
-		SpinLockRelease(&pstate->mutex);
+		state = BM_INITIAL;
+		pg_atomic_compare_exchange_u32(&pstate->state, &state, BM_INPROGRESS);
 
 		/* Exit if bitmap is done, or if we're the leader. */
 		if (state != BM_INPROGRESS)
@@ -538,9 +531,7 @@ ExecBitmapHeapInitializeDSM(BitmapHeapScanState *node,
 
 	pstate->tbmiterator = 0;
 
-	/* Initialize the mutex */
-	SpinLockInit(&pstate->mutex);
-	pstate->state = BM_INITIAL;
+	pg_atomic_init_u32(&pstate->state, BM_INITIAL);
 
 	ConditionVariableInit(&pstate->cv);
 
@@ -565,7 +556,7 @@ ExecBitmapHeapReInitializeDSM(BitmapHeapScanState *node,
 	if (dsa == NULL)
 		return;
 
-	pstate->state = BM_INITIAL;
+	pg_atomic_write_u32(&pstate->state, BM_INITIAL);
 
 	if (DsaPointerIsValid(pstate->tbmiterator))
 		tbm_free_shared_area(dsa, pstate->tbmiterator);
-- 
2.50.1 (Apple Git-155)


--Ot5x3ffkWEuxilWO
Content-Type: text/plain; charset=us-ascii
Content-Disposition: attachment;
	filename=v1-0003-convert-FixedParallelState-last_xlog_end-to-an-at.patch



^ permalink  raw  reply  [nested|flat] 440+ messages in thread

* [PATCH v1 2/8] convert ParallelBitmapHeapState->state to an atomic
@ 2026-07-09 18:38 Nathan Bossart <nathan@postgresql.org>
  0 siblings, 0 replies; 440+ messages in thread

From: Nathan Bossart @ 2026-07-09 18:38 UTC (permalink / raw)

---
 src/backend/executor/nodeBitmapHeapscan.c | 21 ++++++---------------
 1 file changed, 6 insertions(+), 15 deletions(-)

diff --git a/src/backend/executor/nodeBitmapHeapscan.c b/src/backend/executor/nodeBitmapHeapscan.c
index 83d6478bc2b..f2bb487bf10 100644
--- a/src/backend/executor/nodeBitmapHeapscan.c
+++ b/src/backend/executor/nodeBitmapHeapscan.c
@@ -79,7 +79,6 @@ typedef enum
 /* ----------------
  *	 ParallelBitmapHeapState information
  *		tbmiterator				iterator for scanning current pages
- *		mutex					mutual exclusion for state
  *		state					current state of the TIDBitmap
  *		cv						conditional wait variable
  * ----------------
@@ -87,8 +86,7 @@ typedef enum
 typedef struct ParallelBitmapHeapState
 {
 	dsa_pointer tbmiterator;
-	slock_t		mutex;
-	SharedBitmapState state;
+	pg_atomic_uint32 state;
 	ConditionVariable cv;
 } ParallelBitmapHeapState;
 
@@ -228,9 +226,7 @@ BitmapHeapNext(BitmapHeapScanState *node)
 static inline void
 BitmapDoneInitializingSharedState(ParallelBitmapHeapState *pstate)
 {
-	SpinLockAcquire(&pstate->mutex);
-	pstate->state = BM_FINISHED;
-	SpinLockRelease(&pstate->mutex);
+	pg_atomic_write_membarrier_u32(&pstate->state, BM_FINISHED);
 	ConditionVariableBroadcast(&pstate->cv);
 }
 
@@ -480,11 +476,8 @@ BitmapShouldInitializeSharedState(ParallelBitmapHeapState *pstate)
 
 	while (1)
 	{
-		SpinLockAcquire(&pstate->mutex);
-		state = pstate->state;
-		if (pstate->state == BM_INITIAL)
-			pstate->state = BM_INPROGRESS;
-		SpinLockRelease(&pstate->mutex);
+		state = BM_INITIAL;
+		pg_atomic_compare_exchange_u32(&pstate->state, &state, BM_INPROGRESS);
 
 		/* Exit if bitmap is done, or if we're the leader. */
 		if (state != BM_INPROGRESS)
@@ -538,9 +531,7 @@ ExecBitmapHeapInitializeDSM(BitmapHeapScanState *node,
 
 	pstate->tbmiterator = 0;
 
-	/* Initialize the mutex */
-	SpinLockInit(&pstate->mutex);
-	pstate->state = BM_INITIAL;
+	pg_atomic_init_u32(&pstate->state, BM_INITIAL);
 
 	ConditionVariableInit(&pstate->cv);
 
@@ -565,7 +556,7 @@ ExecBitmapHeapReInitializeDSM(BitmapHeapScanState *node,
 	if (dsa == NULL)
 		return;
 
-	pstate->state = BM_INITIAL;
+	pg_atomic_write_u32(&pstate->state, BM_INITIAL);
 
 	if (DsaPointerIsValid(pstate->tbmiterator))
 		tbm_free_shared_area(dsa, pstate->tbmiterator);
-- 
2.50.1 (Apple Git-155)


--Ot5x3ffkWEuxilWO
Content-Type: text/plain; charset=us-ascii
Content-Disposition: attachment;
	filename=v1-0003-convert-FixedParallelState-last_xlog_end-to-an-at.patch



^ permalink  raw  reply  [nested|flat] 440+ messages in thread

* [PATCH v1 2/8] convert ParallelBitmapHeapState->state to an atomic
@ 2026-07-09 18:38 Nathan Bossart <nathan@postgresql.org>
  0 siblings, 0 replies; 440+ messages in thread

From: Nathan Bossart @ 2026-07-09 18:38 UTC (permalink / raw)

---
 src/backend/executor/nodeBitmapHeapscan.c | 21 ++++++---------------
 1 file changed, 6 insertions(+), 15 deletions(-)

diff --git a/src/backend/executor/nodeBitmapHeapscan.c b/src/backend/executor/nodeBitmapHeapscan.c
index 83d6478bc2b..f2bb487bf10 100644
--- a/src/backend/executor/nodeBitmapHeapscan.c
+++ b/src/backend/executor/nodeBitmapHeapscan.c
@@ -79,7 +79,6 @@ typedef enum
 /* ----------------
  *	 ParallelBitmapHeapState information
  *		tbmiterator				iterator for scanning current pages
- *		mutex					mutual exclusion for state
  *		state					current state of the TIDBitmap
  *		cv						conditional wait variable
  * ----------------
@@ -87,8 +86,7 @@ typedef enum
 typedef struct ParallelBitmapHeapState
 {
 	dsa_pointer tbmiterator;
-	slock_t		mutex;
-	SharedBitmapState state;
+	pg_atomic_uint32 state;
 	ConditionVariable cv;
 } ParallelBitmapHeapState;
 
@@ -228,9 +226,7 @@ BitmapHeapNext(BitmapHeapScanState *node)
 static inline void
 BitmapDoneInitializingSharedState(ParallelBitmapHeapState *pstate)
 {
-	SpinLockAcquire(&pstate->mutex);
-	pstate->state = BM_FINISHED;
-	SpinLockRelease(&pstate->mutex);
+	pg_atomic_write_membarrier_u32(&pstate->state, BM_FINISHED);
 	ConditionVariableBroadcast(&pstate->cv);
 }
 
@@ -480,11 +476,8 @@ BitmapShouldInitializeSharedState(ParallelBitmapHeapState *pstate)
 
 	while (1)
 	{
-		SpinLockAcquire(&pstate->mutex);
-		state = pstate->state;
-		if (pstate->state == BM_INITIAL)
-			pstate->state = BM_INPROGRESS;
-		SpinLockRelease(&pstate->mutex);
+		state = BM_INITIAL;
+		pg_atomic_compare_exchange_u32(&pstate->state, &state, BM_INPROGRESS);
 
 		/* Exit if bitmap is done, or if we're the leader. */
 		if (state != BM_INPROGRESS)
@@ -538,9 +531,7 @@ ExecBitmapHeapInitializeDSM(BitmapHeapScanState *node,
 
 	pstate->tbmiterator = 0;
 
-	/* Initialize the mutex */
-	SpinLockInit(&pstate->mutex);
-	pstate->state = BM_INITIAL;
+	pg_atomic_init_u32(&pstate->state, BM_INITIAL);
 
 	ConditionVariableInit(&pstate->cv);
 
@@ -565,7 +556,7 @@ ExecBitmapHeapReInitializeDSM(BitmapHeapScanState *node,
 	if (dsa == NULL)
 		return;
 
-	pstate->state = BM_INITIAL;
+	pg_atomic_write_u32(&pstate->state, BM_INITIAL);
 
 	if (DsaPointerIsValid(pstate->tbmiterator))
 		tbm_free_shared_area(dsa, pstate->tbmiterator);
-- 
2.50.1 (Apple Git-155)


--Ot5x3ffkWEuxilWO
Content-Type: text/plain; charset=us-ascii
Content-Disposition: attachment;
	filename=v1-0003-convert-FixedParallelState-last_xlog_end-to-an-at.patch



^ permalink  raw  reply  [nested|flat] 440+ messages in thread

* [PATCH v1 2/8] convert ParallelBitmapHeapState->state to an atomic
@ 2026-07-09 18:38 Nathan Bossart <nathan@postgresql.org>
  0 siblings, 0 replies; 440+ messages in thread

From: Nathan Bossart @ 2026-07-09 18:38 UTC (permalink / raw)

---
 src/backend/executor/nodeBitmapHeapscan.c | 21 ++++++---------------
 1 file changed, 6 insertions(+), 15 deletions(-)

diff --git a/src/backend/executor/nodeBitmapHeapscan.c b/src/backend/executor/nodeBitmapHeapscan.c
index 83d6478bc2b..f2bb487bf10 100644
--- a/src/backend/executor/nodeBitmapHeapscan.c
+++ b/src/backend/executor/nodeBitmapHeapscan.c
@@ -79,7 +79,6 @@ typedef enum
 /* ----------------
  *	 ParallelBitmapHeapState information
  *		tbmiterator				iterator for scanning current pages
- *		mutex					mutual exclusion for state
  *		state					current state of the TIDBitmap
  *		cv						conditional wait variable
  * ----------------
@@ -87,8 +86,7 @@ typedef enum
 typedef struct ParallelBitmapHeapState
 {
 	dsa_pointer tbmiterator;
-	slock_t		mutex;
-	SharedBitmapState state;
+	pg_atomic_uint32 state;
 	ConditionVariable cv;
 } ParallelBitmapHeapState;
 
@@ -228,9 +226,7 @@ BitmapHeapNext(BitmapHeapScanState *node)
 static inline void
 BitmapDoneInitializingSharedState(ParallelBitmapHeapState *pstate)
 {
-	SpinLockAcquire(&pstate->mutex);
-	pstate->state = BM_FINISHED;
-	SpinLockRelease(&pstate->mutex);
+	pg_atomic_write_membarrier_u32(&pstate->state, BM_FINISHED);
 	ConditionVariableBroadcast(&pstate->cv);
 }
 
@@ -480,11 +476,8 @@ BitmapShouldInitializeSharedState(ParallelBitmapHeapState *pstate)
 
 	while (1)
 	{
-		SpinLockAcquire(&pstate->mutex);
-		state = pstate->state;
-		if (pstate->state == BM_INITIAL)
-			pstate->state = BM_INPROGRESS;
-		SpinLockRelease(&pstate->mutex);
+		state = BM_INITIAL;
+		pg_atomic_compare_exchange_u32(&pstate->state, &state, BM_INPROGRESS);
 
 		/* Exit if bitmap is done, or if we're the leader. */
 		if (state != BM_INPROGRESS)
@@ -538,9 +531,7 @@ ExecBitmapHeapInitializeDSM(BitmapHeapScanState *node,
 
 	pstate->tbmiterator = 0;
 
-	/* Initialize the mutex */
-	SpinLockInit(&pstate->mutex);
-	pstate->state = BM_INITIAL;
+	pg_atomic_init_u32(&pstate->state, BM_INITIAL);
 
 	ConditionVariableInit(&pstate->cv);
 
@@ -565,7 +556,7 @@ ExecBitmapHeapReInitializeDSM(BitmapHeapScanState *node,
 	if (dsa == NULL)
 		return;
 
-	pstate->state = BM_INITIAL;
+	pg_atomic_write_u32(&pstate->state, BM_INITIAL);
 
 	if (DsaPointerIsValid(pstate->tbmiterator))
 		tbm_free_shared_area(dsa, pstate->tbmiterator);
-- 
2.50.1 (Apple Git-155)


--Ot5x3ffkWEuxilWO
Content-Type: text/plain; charset=us-ascii
Content-Disposition: attachment;
	filename=v1-0003-convert-FixedParallelState-last_xlog_end-to-an-at.patch



^ permalink  raw  reply  [nested|flat] 440+ messages in thread

* [PATCH v1 2/8] convert ParallelBitmapHeapState->state to an atomic
@ 2026-07-09 18:38 Nathan Bossart <nathan@postgresql.org>
  0 siblings, 0 replies; 440+ messages in thread

From: Nathan Bossart @ 2026-07-09 18:38 UTC (permalink / raw)

---
 src/backend/executor/nodeBitmapHeapscan.c | 21 ++++++---------------
 1 file changed, 6 insertions(+), 15 deletions(-)

diff --git a/src/backend/executor/nodeBitmapHeapscan.c b/src/backend/executor/nodeBitmapHeapscan.c
index 83d6478bc2b..f2bb487bf10 100644
--- a/src/backend/executor/nodeBitmapHeapscan.c
+++ b/src/backend/executor/nodeBitmapHeapscan.c
@@ -79,7 +79,6 @@ typedef enum
 /* ----------------
  *	 ParallelBitmapHeapState information
  *		tbmiterator				iterator for scanning current pages
- *		mutex					mutual exclusion for state
  *		state					current state of the TIDBitmap
  *		cv						conditional wait variable
  * ----------------
@@ -87,8 +86,7 @@ typedef enum
 typedef struct ParallelBitmapHeapState
 {
 	dsa_pointer tbmiterator;
-	slock_t		mutex;
-	SharedBitmapState state;
+	pg_atomic_uint32 state;
 	ConditionVariable cv;
 } ParallelBitmapHeapState;
 
@@ -228,9 +226,7 @@ BitmapHeapNext(BitmapHeapScanState *node)
 static inline void
 BitmapDoneInitializingSharedState(ParallelBitmapHeapState *pstate)
 {
-	SpinLockAcquire(&pstate->mutex);
-	pstate->state = BM_FINISHED;
-	SpinLockRelease(&pstate->mutex);
+	pg_atomic_write_membarrier_u32(&pstate->state, BM_FINISHED);
 	ConditionVariableBroadcast(&pstate->cv);
 }
 
@@ -480,11 +476,8 @@ BitmapShouldInitializeSharedState(ParallelBitmapHeapState *pstate)
 
 	while (1)
 	{
-		SpinLockAcquire(&pstate->mutex);
-		state = pstate->state;
-		if (pstate->state == BM_INITIAL)
-			pstate->state = BM_INPROGRESS;
-		SpinLockRelease(&pstate->mutex);
+		state = BM_INITIAL;
+		pg_atomic_compare_exchange_u32(&pstate->state, &state, BM_INPROGRESS);
 
 		/* Exit if bitmap is done, or if we're the leader. */
 		if (state != BM_INPROGRESS)
@@ -538,9 +531,7 @@ ExecBitmapHeapInitializeDSM(BitmapHeapScanState *node,
 
 	pstate->tbmiterator = 0;
 
-	/* Initialize the mutex */
-	SpinLockInit(&pstate->mutex);
-	pstate->state = BM_INITIAL;
+	pg_atomic_init_u32(&pstate->state, BM_INITIAL);
 
 	ConditionVariableInit(&pstate->cv);
 
@@ -565,7 +556,7 @@ ExecBitmapHeapReInitializeDSM(BitmapHeapScanState *node,
 	if (dsa == NULL)
 		return;
 
-	pstate->state = BM_INITIAL;
+	pg_atomic_write_u32(&pstate->state, BM_INITIAL);
 
 	if (DsaPointerIsValid(pstate->tbmiterator))
 		tbm_free_shared_area(dsa, pstate->tbmiterator);
-- 
2.50.1 (Apple Git-155)


--Ot5x3ffkWEuxilWO
Content-Type: text/plain; charset=us-ascii
Content-Disposition: attachment;
	filename=v1-0003-convert-FixedParallelState-last_xlog_end-to-an-at.patch



^ permalink  raw  reply  [nested|flat] 440+ messages in thread

* [PATCH v1 2/8] convert ParallelBitmapHeapState->state to an atomic
@ 2026-07-09 18:38 Nathan Bossart <nathan@postgresql.org>
  0 siblings, 0 replies; 440+ messages in thread

From: Nathan Bossart @ 2026-07-09 18:38 UTC (permalink / raw)

---
 src/backend/executor/nodeBitmapHeapscan.c | 21 ++++++---------------
 1 file changed, 6 insertions(+), 15 deletions(-)

diff --git a/src/backend/executor/nodeBitmapHeapscan.c b/src/backend/executor/nodeBitmapHeapscan.c
index 83d6478bc2b..f2bb487bf10 100644
--- a/src/backend/executor/nodeBitmapHeapscan.c
+++ b/src/backend/executor/nodeBitmapHeapscan.c
@@ -79,7 +79,6 @@ typedef enum
 /* ----------------
  *	 ParallelBitmapHeapState information
  *		tbmiterator				iterator for scanning current pages
- *		mutex					mutual exclusion for state
  *		state					current state of the TIDBitmap
  *		cv						conditional wait variable
  * ----------------
@@ -87,8 +86,7 @@ typedef enum
 typedef struct ParallelBitmapHeapState
 {
 	dsa_pointer tbmiterator;
-	slock_t		mutex;
-	SharedBitmapState state;
+	pg_atomic_uint32 state;
 	ConditionVariable cv;
 } ParallelBitmapHeapState;
 
@@ -228,9 +226,7 @@ BitmapHeapNext(BitmapHeapScanState *node)
 static inline void
 BitmapDoneInitializingSharedState(ParallelBitmapHeapState *pstate)
 {
-	SpinLockAcquire(&pstate->mutex);
-	pstate->state = BM_FINISHED;
-	SpinLockRelease(&pstate->mutex);
+	pg_atomic_write_membarrier_u32(&pstate->state, BM_FINISHED);
 	ConditionVariableBroadcast(&pstate->cv);
 }
 
@@ -480,11 +476,8 @@ BitmapShouldInitializeSharedState(ParallelBitmapHeapState *pstate)
 
 	while (1)
 	{
-		SpinLockAcquire(&pstate->mutex);
-		state = pstate->state;
-		if (pstate->state == BM_INITIAL)
-			pstate->state = BM_INPROGRESS;
-		SpinLockRelease(&pstate->mutex);
+		state = BM_INITIAL;
+		pg_atomic_compare_exchange_u32(&pstate->state, &state, BM_INPROGRESS);
 
 		/* Exit if bitmap is done, or if we're the leader. */
 		if (state != BM_INPROGRESS)
@@ -538,9 +531,7 @@ ExecBitmapHeapInitializeDSM(BitmapHeapScanState *node,
 
 	pstate->tbmiterator = 0;
 
-	/* Initialize the mutex */
-	SpinLockInit(&pstate->mutex);
-	pstate->state = BM_INITIAL;
+	pg_atomic_init_u32(&pstate->state, BM_INITIAL);
 
 	ConditionVariableInit(&pstate->cv);
 
@@ -565,7 +556,7 @@ ExecBitmapHeapReInitializeDSM(BitmapHeapScanState *node,
 	if (dsa == NULL)
 		return;
 
-	pstate->state = BM_INITIAL;
+	pg_atomic_write_u32(&pstate->state, BM_INITIAL);
 
 	if (DsaPointerIsValid(pstate->tbmiterator))
 		tbm_free_shared_area(dsa, pstate->tbmiterator);
-- 
2.50.1 (Apple Git-155)


--Ot5x3ffkWEuxilWO
Content-Type: text/plain; charset=us-ascii
Content-Disposition: attachment;
	filename=v1-0003-convert-FixedParallelState-last_xlog_end-to-an-at.patch



^ permalink  raw  reply  [nested|flat] 440+ messages in thread

* [PATCH v1 2/8] convert ParallelBitmapHeapState->state to an atomic
@ 2026-07-09 18:38 Nathan Bossart <nathan@postgresql.org>
  0 siblings, 0 replies; 440+ messages in thread

From: Nathan Bossart @ 2026-07-09 18:38 UTC (permalink / raw)

---
 src/backend/executor/nodeBitmapHeapscan.c | 21 ++++++---------------
 1 file changed, 6 insertions(+), 15 deletions(-)

diff --git a/src/backend/executor/nodeBitmapHeapscan.c b/src/backend/executor/nodeBitmapHeapscan.c
index 83d6478bc2b..f2bb487bf10 100644
--- a/src/backend/executor/nodeBitmapHeapscan.c
+++ b/src/backend/executor/nodeBitmapHeapscan.c
@@ -79,7 +79,6 @@ typedef enum
 /* ----------------
  *	 ParallelBitmapHeapState information
  *		tbmiterator				iterator for scanning current pages
- *		mutex					mutual exclusion for state
  *		state					current state of the TIDBitmap
  *		cv						conditional wait variable
  * ----------------
@@ -87,8 +86,7 @@ typedef enum
 typedef struct ParallelBitmapHeapState
 {
 	dsa_pointer tbmiterator;
-	slock_t		mutex;
-	SharedBitmapState state;
+	pg_atomic_uint32 state;
 	ConditionVariable cv;
 } ParallelBitmapHeapState;
 
@@ -228,9 +226,7 @@ BitmapHeapNext(BitmapHeapScanState *node)
 static inline void
 BitmapDoneInitializingSharedState(ParallelBitmapHeapState *pstate)
 {
-	SpinLockAcquire(&pstate->mutex);
-	pstate->state = BM_FINISHED;
-	SpinLockRelease(&pstate->mutex);
+	pg_atomic_write_membarrier_u32(&pstate->state, BM_FINISHED);
 	ConditionVariableBroadcast(&pstate->cv);
 }
 
@@ -480,11 +476,8 @@ BitmapShouldInitializeSharedState(ParallelBitmapHeapState *pstate)
 
 	while (1)
 	{
-		SpinLockAcquire(&pstate->mutex);
-		state = pstate->state;
-		if (pstate->state == BM_INITIAL)
-			pstate->state = BM_INPROGRESS;
-		SpinLockRelease(&pstate->mutex);
+		state = BM_INITIAL;
+		pg_atomic_compare_exchange_u32(&pstate->state, &state, BM_INPROGRESS);
 
 		/* Exit if bitmap is done, or if we're the leader. */
 		if (state != BM_INPROGRESS)
@@ -538,9 +531,7 @@ ExecBitmapHeapInitializeDSM(BitmapHeapScanState *node,
 
 	pstate->tbmiterator = 0;
 
-	/* Initialize the mutex */
-	SpinLockInit(&pstate->mutex);
-	pstate->state = BM_INITIAL;
+	pg_atomic_init_u32(&pstate->state, BM_INITIAL);
 
 	ConditionVariableInit(&pstate->cv);
 
@@ -565,7 +556,7 @@ ExecBitmapHeapReInitializeDSM(BitmapHeapScanState *node,
 	if (dsa == NULL)
 		return;
 
-	pstate->state = BM_INITIAL;
+	pg_atomic_write_u32(&pstate->state, BM_INITIAL);
 
 	if (DsaPointerIsValid(pstate->tbmiterator))
 		tbm_free_shared_area(dsa, pstate->tbmiterator);
-- 
2.50.1 (Apple Git-155)


--Ot5x3ffkWEuxilWO
Content-Type: text/plain; charset=us-ascii
Content-Disposition: attachment;
	filename=v1-0003-convert-FixedParallelState-last_xlog_end-to-an-at.patch



^ permalink  raw  reply  [nested|flat] 440+ messages in thread

* [PATCH v1 2/8] convert ParallelBitmapHeapState->state to an atomic
@ 2026-07-09 18:38 Nathan Bossart <nathan@postgresql.org>
  0 siblings, 0 replies; 440+ messages in thread

From: Nathan Bossart @ 2026-07-09 18:38 UTC (permalink / raw)

---
 src/backend/executor/nodeBitmapHeapscan.c | 21 ++++++---------------
 1 file changed, 6 insertions(+), 15 deletions(-)

diff --git a/src/backend/executor/nodeBitmapHeapscan.c b/src/backend/executor/nodeBitmapHeapscan.c
index 83d6478bc2b..f2bb487bf10 100644
--- a/src/backend/executor/nodeBitmapHeapscan.c
+++ b/src/backend/executor/nodeBitmapHeapscan.c
@@ -79,7 +79,6 @@ typedef enum
 /* ----------------
  *	 ParallelBitmapHeapState information
  *		tbmiterator				iterator for scanning current pages
- *		mutex					mutual exclusion for state
  *		state					current state of the TIDBitmap
  *		cv						conditional wait variable
  * ----------------
@@ -87,8 +86,7 @@ typedef enum
 typedef struct ParallelBitmapHeapState
 {
 	dsa_pointer tbmiterator;
-	slock_t		mutex;
-	SharedBitmapState state;
+	pg_atomic_uint32 state;
 	ConditionVariable cv;
 } ParallelBitmapHeapState;
 
@@ -228,9 +226,7 @@ BitmapHeapNext(BitmapHeapScanState *node)
 static inline void
 BitmapDoneInitializingSharedState(ParallelBitmapHeapState *pstate)
 {
-	SpinLockAcquire(&pstate->mutex);
-	pstate->state = BM_FINISHED;
-	SpinLockRelease(&pstate->mutex);
+	pg_atomic_write_membarrier_u32(&pstate->state, BM_FINISHED);
 	ConditionVariableBroadcast(&pstate->cv);
 }
 
@@ -480,11 +476,8 @@ BitmapShouldInitializeSharedState(ParallelBitmapHeapState *pstate)
 
 	while (1)
 	{
-		SpinLockAcquire(&pstate->mutex);
-		state = pstate->state;
-		if (pstate->state == BM_INITIAL)
-			pstate->state = BM_INPROGRESS;
-		SpinLockRelease(&pstate->mutex);
+		state = BM_INITIAL;
+		pg_atomic_compare_exchange_u32(&pstate->state, &state, BM_INPROGRESS);
 
 		/* Exit if bitmap is done, or if we're the leader. */
 		if (state != BM_INPROGRESS)
@@ -538,9 +531,7 @@ ExecBitmapHeapInitializeDSM(BitmapHeapScanState *node,
 
 	pstate->tbmiterator = 0;
 
-	/* Initialize the mutex */
-	SpinLockInit(&pstate->mutex);
-	pstate->state = BM_INITIAL;
+	pg_atomic_init_u32(&pstate->state, BM_INITIAL);
 
 	ConditionVariableInit(&pstate->cv);
 
@@ -565,7 +556,7 @@ ExecBitmapHeapReInitializeDSM(BitmapHeapScanState *node,
 	if (dsa == NULL)
 		return;
 
-	pstate->state = BM_INITIAL;
+	pg_atomic_write_u32(&pstate->state, BM_INITIAL);
 
 	if (DsaPointerIsValid(pstate->tbmiterator))
 		tbm_free_shared_area(dsa, pstate->tbmiterator);
-- 
2.50.1 (Apple Git-155)


--Ot5x3ffkWEuxilWO
Content-Type: text/plain; charset=us-ascii
Content-Disposition: attachment;
	filename=v1-0003-convert-FixedParallelState-last_xlog_end-to-an-at.patch



^ permalink  raw  reply  [nested|flat] 440+ messages in thread

* [PATCH v2 2/9] convert ParallelBitmapHeapState->state to an atomic
@ 2026-07-09 18:38 Nathan Bossart <nathan@postgresql.org>
  0 siblings, 0 replies; 440+ messages in thread

From: Nathan Bossart @ 2026-07-09 18:38 UTC (permalink / raw)

---
 src/backend/executor/nodeBitmapHeapscan.c | 23 +++++++----------------
 1 file changed, 7 insertions(+), 16 deletions(-)

diff --git a/src/backend/executor/nodeBitmapHeapscan.c b/src/backend/executor/nodeBitmapHeapscan.c
index 83d6478bc2b..a9e83f30687 100644
--- a/src/backend/executor/nodeBitmapHeapscan.c
+++ b/src/backend/executor/nodeBitmapHeapscan.c
@@ -79,7 +79,6 @@ typedef enum
 /* ----------------
  *	 ParallelBitmapHeapState information
  *		tbmiterator				iterator for scanning current pages
- *		mutex					mutual exclusion for state
  *		state					current state of the TIDBitmap
  *		cv						conditional wait variable
  * ----------------
@@ -87,8 +86,7 @@ typedef enum
 typedef struct ParallelBitmapHeapState
 {
 	dsa_pointer tbmiterator;
-	slock_t		mutex;
-	SharedBitmapState state;
+	pg_atomic_uint32 state;
 	ConditionVariable cv;
 } ParallelBitmapHeapState;
 
@@ -228,9 +226,7 @@ BitmapHeapNext(BitmapHeapScanState *node)
 static inline void
 BitmapDoneInitializingSharedState(ParallelBitmapHeapState *pstate)
 {
-	SpinLockAcquire(&pstate->mutex);
-	pstate->state = BM_FINISHED;
-	SpinLockRelease(&pstate->mutex);
+	pg_atomic_write_membarrier_u32(&pstate->state, BM_FINISHED);
 	ConditionVariableBroadcast(&pstate->cv);
 }
 
@@ -476,15 +472,12 @@ ExecInitBitmapHeapScan(BitmapHeapScan *node, EState *estate, int eflags)
 static bool
 BitmapShouldInitializeSharedState(ParallelBitmapHeapState *pstate)
 {
-	SharedBitmapState state;
+	uint32		state;
 
 	while (1)
 	{
-		SpinLockAcquire(&pstate->mutex);
-		state = pstate->state;
-		if (pstate->state == BM_INITIAL)
-			pstate->state = BM_INPROGRESS;
-		SpinLockRelease(&pstate->mutex);
+		state = BM_INITIAL;
+		pg_atomic_compare_exchange_u32(&pstate->state, &state, BM_INPROGRESS);
 
 		/* Exit if bitmap is done, or if we're the leader. */
 		if (state != BM_INPROGRESS)
@@ -538,9 +531,7 @@ ExecBitmapHeapInitializeDSM(BitmapHeapScanState *node,
 
 	pstate->tbmiterator = 0;
 
-	/* Initialize the mutex */
-	SpinLockInit(&pstate->mutex);
-	pstate->state = BM_INITIAL;
+	pg_atomic_init_u32(&pstate->state, BM_INITIAL);
 
 	ConditionVariableInit(&pstate->cv);
 
@@ -565,7 +556,7 @@ ExecBitmapHeapReInitializeDSM(BitmapHeapScanState *node,
 	if (dsa == NULL)
 		return;
 
-	pstate->state = BM_INITIAL;
+	pg_atomic_write_u32(&pstate->state, BM_INITIAL);
 
 	if (DsaPointerIsValid(pstate->tbmiterator))
 		tbm_free_shared_area(dsa, pstate->tbmiterator);
-- 
2.50.1 (Apple Git-155)


--Xf36GNcW+0xZNily
Content-Type: text/plain; charset=us-ascii
Content-Disposition: attachment;
	filename=v2-0003-convert-FixedParallelState-last_xlog_end-to-an-at.patch



^ permalink  raw  reply  [nested|flat] 440+ messages in thread

* [PATCH v1 2/8] convert ParallelBitmapHeapState->state to an atomic
@ 2026-07-09 18:38 Nathan Bossart <nathan@postgresql.org>
  0 siblings, 0 replies; 440+ messages in thread

From: Nathan Bossart @ 2026-07-09 18:38 UTC (permalink / raw)

---
 src/backend/executor/nodeBitmapHeapscan.c | 21 ++++++---------------
 1 file changed, 6 insertions(+), 15 deletions(-)

diff --git a/src/backend/executor/nodeBitmapHeapscan.c b/src/backend/executor/nodeBitmapHeapscan.c
index 83d6478bc2b..f2bb487bf10 100644
--- a/src/backend/executor/nodeBitmapHeapscan.c
+++ b/src/backend/executor/nodeBitmapHeapscan.c
@@ -79,7 +79,6 @@ typedef enum
 /* ----------------
  *	 ParallelBitmapHeapState information
  *		tbmiterator				iterator for scanning current pages
- *		mutex					mutual exclusion for state
  *		state					current state of the TIDBitmap
  *		cv						conditional wait variable
  * ----------------
@@ -87,8 +86,7 @@ typedef enum
 typedef struct ParallelBitmapHeapState
 {
 	dsa_pointer tbmiterator;
-	slock_t		mutex;
-	SharedBitmapState state;
+	pg_atomic_uint32 state;
 	ConditionVariable cv;
 } ParallelBitmapHeapState;
 
@@ -228,9 +226,7 @@ BitmapHeapNext(BitmapHeapScanState *node)
 static inline void
 BitmapDoneInitializingSharedState(ParallelBitmapHeapState *pstate)
 {
-	SpinLockAcquire(&pstate->mutex);
-	pstate->state = BM_FINISHED;
-	SpinLockRelease(&pstate->mutex);
+	pg_atomic_write_membarrier_u32(&pstate->state, BM_FINISHED);
 	ConditionVariableBroadcast(&pstate->cv);
 }
 
@@ -480,11 +476,8 @@ BitmapShouldInitializeSharedState(ParallelBitmapHeapState *pstate)
 
 	while (1)
 	{
-		SpinLockAcquire(&pstate->mutex);
-		state = pstate->state;
-		if (pstate->state == BM_INITIAL)
-			pstate->state = BM_INPROGRESS;
-		SpinLockRelease(&pstate->mutex);
+		state = BM_INITIAL;
+		pg_atomic_compare_exchange_u32(&pstate->state, &state, BM_INPROGRESS);
 
 		/* Exit if bitmap is done, or if we're the leader. */
 		if (state != BM_INPROGRESS)
@@ -538,9 +531,7 @@ ExecBitmapHeapInitializeDSM(BitmapHeapScanState *node,
 
 	pstate->tbmiterator = 0;
 
-	/* Initialize the mutex */
-	SpinLockInit(&pstate->mutex);
-	pstate->state = BM_INITIAL;
+	pg_atomic_init_u32(&pstate->state, BM_INITIAL);
 
 	ConditionVariableInit(&pstate->cv);
 
@@ -565,7 +556,7 @@ ExecBitmapHeapReInitializeDSM(BitmapHeapScanState *node,
 	if (dsa == NULL)
 		return;
 
-	pstate->state = BM_INITIAL;
+	pg_atomic_write_u32(&pstate->state, BM_INITIAL);
 
 	if (DsaPointerIsValid(pstate->tbmiterator))
 		tbm_free_shared_area(dsa, pstate->tbmiterator);
-- 
2.50.1 (Apple Git-155)


--Ot5x3ffkWEuxilWO
Content-Type: text/plain; charset=us-ascii
Content-Disposition: attachment;
	filename=v1-0003-convert-FixedParallelState-last_xlog_end-to-an-at.patch



^ permalink  raw  reply  [nested|flat] 440+ messages in thread

* [PATCH v1 2/8] convert ParallelBitmapHeapState->state to an atomic
@ 2026-07-09 18:38 Nathan Bossart <nathan@postgresql.org>
  0 siblings, 0 replies; 440+ messages in thread

From: Nathan Bossart @ 2026-07-09 18:38 UTC (permalink / raw)

---
 src/backend/executor/nodeBitmapHeapscan.c | 21 ++++++---------------
 1 file changed, 6 insertions(+), 15 deletions(-)

diff --git a/src/backend/executor/nodeBitmapHeapscan.c b/src/backend/executor/nodeBitmapHeapscan.c
index 83d6478bc2b..f2bb487bf10 100644
--- a/src/backend/executor/nodeBitmapHeapscan.c
+++ b/src/backend/executor/nodeBitmapHeapscan.c
@@ -79,7 +79,6 @@ typedef enum
 /* ----------------
  *	 ParallelBitmapHeapState information
  *		tbmiterator				iterator for scanning current pages
- *		mutex					mutual exclusion for state
  *		state					current state of the TIDBitmap
  *		cv						conditional wait variable
  * ----------------
@@ -87,8 +86,7 @@ typedef enum
 typedef struct ParallelBitmapHeapState
 {
 	dsa_pointer tbmiterator;
-	slock_t		mutex;
-	SharedBitmapState state;
+	pg_atomic_uint32 state;
 	ConditionVariable cv;
 } ParallelBitmapHeapState;
 
@@ -228,9 +226,7 @@ BitmapHeapNext(BitmapHeapScanState *node)
 static inline void
 BitmapDoneInitializingSharedState(ParallelBitmapHeapState *pstate)
 {
-	SpinLockAcquire(&pstate->mutex);
-	pstate->state = BM_FINISHED;
-	SpinLockRelease(&pstate->mutex);
+	pg_atomic_write_membarrier_u32(&pstate->state, BM_FINISHED);
 	ConditionVariableBroadcast(&pstate->cv);
 }
 
@@ -480,11 +476,8 @@ BitmapShouldInitializeSharedState(ParallelBitmapHeapState *pstate)
 
 	while (1)
 	{
-		SpinLockAcquire(&pstate->mutex);
-		state = pstate->state;
-		if (pstate->state == BM_INITIAL)
-			pstate->state = BM_INPROGRESS;
-		SpinLockRelease(&pstate->mutex);
+		state = BM_INITIAL;
+		pg_atomic_compare_exchange_u32(&pstate->state, &state, BM_INPROGRESS);
 
 		/* Exit if bitmap is done, or if we're the leader. */
 		if (state != BM_INPROGRESS)
@@ -538,9 +531,7 @@ ExecBitmapHeapInitializeDSM(BitmapHeapScanState *node,
 
 	pstate->tbmiterator = 0;
 
-	/* Initialize the mutex */
-	SpinLockInit(&pstate->mutex);
-	pstate->state = BM_INITIAL;
+	pg_atomic_init_u32(&pstate->state, BM_INITIAL);
 
 	ConditionVariableInit(&pstate->cv);
 
@@ -565,7 +556,7 @@ ExecBitmapHeapReInitializeDSM(BitmapHeapScanState *node,
 	if (dsa == NULL)
 		return;
 
-	pstate->state = BM_INITIAL;
+	pg_atomic_write_u32(&pstate->state, BM_INITIAL);
 
 	if (DsaPointerIsValid(pstate->tbmiterator))
 		tbm_free_shared_area(dsa, pstate->tbmiterator);
-- 
2.50.1 (Apple Git-155)


--Ot5x3ffkWEuxilWO
Content-Type: text/plain; charset=us-ascii
Content-Disposition: attachment;
	filename=v1-0003-convert-FixedParallelState-last_xlog_end-to-an-at.patch



^ permalink  raw  reply  [nested|flat] 440+ messages in thread

* [PATCH v1 2/8] convert ParallelBitmapHeapState->state to an atomic
@ 2026-07-09 18:38 Nathan Bossart <nathan@postgresql.org>
  0 siblings, 0 replies; 440+ messages in thread

From: Nathan Bossart @ 2026-07-09 18:38 UTC (permalink / raw)

---
 src/backend/executor/nodeBitmapHeapscan.c | 21 ++++++---------------
 1 file changed, 6 insertions(+), 15 deletions(-)

diff --git a/src/backend/executor/nodeBitmapHeapscan.c b/src/backend/executor/nodeBitmapHeapscan.c
index 83d6478bc2b..f2bb487bf10 100644
--- a/src/backend/executor/nodeBitmapHeapscan.c
+++ b/src/backend/executor/nodeBitmapHeapscan.c
@@ -79,7 +79,6 @@ typedef enum
 /* ----------------
  *	 ParallelBitmapHeapState information
  *		tbmiterator				iterator for scanning current pages
- *		mutex					mutual exclusion for state
  *		state					current state of the TIDBitmap
  *		cv						conditional wait variable
  * ----------------
@@ -87,8 +86,7 @@ typedef enum
 typedef struct ParallelBitmapHeapState
 {
 	dsa_pointer tbmiterator;
-	slock_t		mutex;
-	SharedBitmapState state;
+	pg_atomic_uint32 state;
 	ConditionVariable cv;
 } ParallelBitmapHeapState;
 
@@ -228,9 +226,7 @@ BitmapHeapNext(BitmapHeapScanState *node)
 static inline void
 BitmapDoneInitializingSharedState(ParallelBitmapHeapState *pstate)
 {
-	SpinLockAcquire(&pstate->mutex);
-	pstate->state = BM_FINISHED;
-	SpinLockRelease(&pstate->mutex);
+	pg_atomic_write_membarrier_u32(&pstate->state, BM_FINISHED);
 	ConditionVariableBroadcast(&pstate->cv);
 }
 
@@ -480,11 +476,8 @@ BitmapShouldInitializeSharedState(ParallelBitmapHeapState *pstate)
 
 	while (1)
 	{
-		SpinLockAcquire(&pstate->mutex);
-		state = pstate->state;
-		if (pstate->state == BM_INITIAL)
-			pstate->state = BM_INPROGRESS;
-		SpinLockRelease(&pstate->mutex);
+		state = BM_INITIAL;
+		pg_atomic_compare_exchange_u32(&pstate->state, &state, BM_INPROGRESS);
 
 		/* Exit if bitmap is done, or if we're the leader. */
 		if (state != BM_INPROGRESS)
@@ -538,9 +531,7 @@ ExecBitmapHeapInitializeDSM(BitmapHeapScanState *node,
 
 	pstate->tbmiterator = 0;
 
-	/* Initialize the mutex */
-	SpinLockInit(&pstate->mutex);
-	pstate->state = BM_INITIAL;
+	pg_atomic_init_u32(&pstate->state, BM_INITIAL);
 
 	ConditionVariableInit(&pstate->cv);
 
@@ -565,7 +556,7 @@ ExecBitmapHeapReInitializeDSM(BitmapHeapScanState *node,
 	if (dsa == NULL)
 		return;
 
-	pstate->state = BM_INITIAL;
+	pg_atomic_write_u32(&pstate->state, BM_INITIAL);
 
 	if (DsaPointerIsValid(pstate->tbmiterator))
 		tbm_free_shared_area(dsa, pstate->tbmiterator);
-- 
2.50.1 (Apple Git-155)


--Ot5x3ffkWEuxilWO
Content-Type: text/plain; charset=us-ascii
Content-Disposition: attachment;
	filename=v1-0003-convert-FixedParallelState-last_xlog_end-to-an-at.patch



^ permalink  raw  reply  [nested|flat] 440+ messages in thread

* [PATCH v1 2/8] convert ParallelBitmapHeapState->state to an atomic
@ 2026-07-09 18:38 Nathan Bossart <nathan@postgresql.org>
  0 siblings, 0 replies; 440+ messages in thread

From: Nathan Bossart @ 2026-07-09 18:38 UTC (permalink / raw)

---
 src/backend/executor/nodeBitmapHeapscan.c | 21 ++++++---------------
 1 file changed, 6 insertions(+), 15 deletions(-)

diff --git a/src/backend/executor/nodeBitmapHeapscan.c b/src/backend/executor/nodeBitmapHeapscan.c
index 83d6478bc2b..f2bb487bf10 100644
--- a/src/backend/executor/nodeBitmapHeapscan.c
+++ b/src/backend/executor/nodeBitmapHeapscan.c
@@ -79,7 +79,6 @@ typedef enum
 /* ----------------
  *	 ParallelBitmapHeapState information
  *		tbmiterator				iterator for scanning current pages
- *		mutex					mutual exclusion for state
  *		state					current state of the TIDBitmap
  *		cv						conditional wait variable
  * ----------------
@@ -87,8 +86,7 @@ typedef enum
 typedef struct ParallelBitmapHeapState
 {
 	dsa_pointer tbmiterator;
-	slock_t		mutex;
-	SharedBitmapState state;
+	pg_atomic_uint32 state;
 	ConditionVariable cv;
 } ParallelBitmapHeapState;
 
@@ -228,9 +226,7 @@ BitmapHeapNext(BitmapHeapScanState *node)
 static inline void
 BitmapDoneInitializingSharedState(ParallelBitmapHeapState *pstate)
 {
-	SpinLockAcquire(&pstate->mutex);
-	pstate->state = BM_FINISHED;
-	SpinLockRelease(&pstate->mutex);
+	pg_atomic_write_membarrier_u32(&pstate->state, BM_FINISHED);
 	ConditionVariableBroadcast(&pstate->cv);
 }
 
@@ -480,11 +476,8 @@ BitmapShouldInitializeSharedState(ParallelBitmapHeapState *pstate)
 
 	while (1)
 	{
-		SpinLockAcquire(&pstate->mutex);
-		state = pstate->state;
-		if (pstate->state == BM_INITIAL)
-			pstate->state = BM_INPROGRESS;
-		SpinLockRelease(&pstate->mutex);
+		state = BM_INITIAL;
+		pg_atomic_compare_exchange_u32(&pstate->state, &state, BM_INPROGRESS);
 
 		/* Exit if bitmap is done, or if we're the leader. */
 		if (state != BM_INPROGRESS)
@@ -538,9 +531,7 @@ ExecBitmapHeapInitializeDSM(BitmapHeapScanState *node,
 
 	pstate->tbmiterator = 0;
 
-	/* Initialize the mutex */
-	SpinLockInit(&pstate->mutex);
-	pstate->state = BM_INITIAL;
+	pg_atomic_init_u32(&pstate->state, BM_INITIAL);
 
 	ConditionVariableInit(&pstate->cv);
 
@@ -565,7 +556,7 @@ ExecBitmapHeapReInitializeDSM(BitmapHeapScanState *node,
 	if (dsa == NULL)
 		return;
 
-	pstate->state = BM_INITIAL;
+	pg_atomic_write_u32(&pstate->state, BM_INITIAL);
 
 	if (DsaPointerIsValid(pstate->tbmiterator))
 		tbm_free_shared_area(dsa, pstate->tbmiterator);
-- 
2.50.1 (Apple Git-155)


--Ot5x3ffkWEuxilWO
Content-Type: text/plain; charset=us-ascii
Content-Disposition: attachment;
	filename=v1-0003-convert-FixedParallelState-last_xlog_end-to-an-at.patch



^ permalink  raw  reply  [nested|flat] 440+ messages in thread

* [PATCH v1 2/8] convert ParallelBitmapHeapState->state to an atomic
@ 2026-07-09 18:38 Nathan Bossart <nathan@postgresql.org>
  0 siblings, 0 replies; 440+ messages in thread

From: Nathan Bossart @ 2026-07-09 18:38 UTC (permalink / raw)

---
 src/backend/executor/nodeBitmapHeapscan.c | 21 ++++++---------------
 1 file changed, 6 insertions(+), 15 deletions(-)

diff --git a/src/backend/executor/nodeBitmapHeapscan.c b/src/backend/executor/nodeBitmapHeapscan.c
index 83d6478bc2b..f2bb487bf10 100644
--- a/src/backend/executor/nodeBitmapHeapscan.c
+++ b/src/backend/executor/nodeBitmapHeapscan.c
@@ -79,7 +79,6 @@ typedef enum
 /* ----------------
  *	 ParallelBitmapHeapState information
  *		tbmiterator				iterator for scanning current pages
- *		mutex					mutual exclusion for state
  *		state					current state of the TIDBitmap
  *		cv						conditional wait variable
  * ----------------
@@ -87,8 +86,7 @@ typedef enum
 typedef struct ParallelBitmapHeapState
 {
 	dsa_pointer tbmiterator;
-	slock_t		mutex;
-	SharedBitmapState state;
+	pg_atomic_uint32 state;
 	ConditionVariable cv;
 } ParallelBitmapHeapState;
 
@@ -228,9 +226,7 @@ BitmapHeapNext(BitmapHeapScanState *node)
 static inline void
 BitmapDoneInitializingSharedState(ParallelBitmapHeapState *pstate)
 {
-	SpinLockAcquire(&pstate->mutex);
-	pstate->state = BM_FINISHED;
-	SpinLockRelease(&pstate->mutex);
+	pg_atomic_write_membarrier_u32(&pstate->state, BM_FINISHED);
 	ConditionVariableBroadcast(&pstate->cv);
 }
 
@@ -480,11 +476,8 @@ BitmapShouldInitializeSharedState(ParallelBitmapHeapState *pstate)
 
 	while (1)
 	{
-		SpinLockAcquire(&pstate->mutex);
-		state = pstate->state;
-		if (pstate->state == BM_INITIAL)
-			pstate->state = BM_INPROGRESS;
-		SpinLockRelease(&pstate->mutex);
+		state = BM_INITIAL;
+		pg_atomic_compare_exchange_u32(&pstate->state, &state, BM_INPROGRESS);
 
 		/* Exit if bitmap is done, or if we're the leader. */
 		if (state != BM_INPROGRESS)
@@ -538,9 +531,7 @@ ExecBitmapHeapInitializeDSM(BitmapHeapScanState *node,
 
 	pstate->tbmiterator = 0;
 
-	/* Initialize the mutex */
-	SpinLockInit(&pstate->mutex);
-	pstate->state = BM_INITIAL;
+	pg_atomic_init_u32(&pstate->state, BM_INITIAL);
 
 	ConditionVariableInit(&pstate->cv);
 
@@ -565,7 +556,7 @@ ExecBitmapHeapReInitializeDSM(BitmapHeapScanState *node,
 	if (dsa == NULL)
 		return;
 
-	pstate->state = BM_INITIAL;
+	pg_atomic_write_u32(&pstate->state, BM_INITIAL);
 
 	if (DsaPointerIsValid(pstate->tbmiterator))
 		tbm_free_shared_area(dsa, pstate->tbmiterator);
-- 
2.50.1 (Apple Git-155)


--Ot5x3ffkWEuxilWO
Content-Type: text/plain; charset=us-ascii
Content-Disposition: attachment;
	filename=v1-0003-convert-FixedParallelState-last_xlog_end-to-an-at.patch



^ permalink  raw  reply  [nested|flat] 440+ messages in thread

* [PATCH v1 2/8] convert ParallelBitmapHeapState->state to an atomic
@ 2026-07-09 18:38 Nathan Bossart <nathan@postgresql.org>
  0 siblings, 0 replies; 440+ messages in thread

From: Nathan Bossart @ 2026-07-09 18:38 UTC (permalink / raw)

---
 src/backend/executor/nodeBitmapHeapscan.c | 21 ++++++---------------
 1 file changed, 6 insertions(+), 15 deletions(-)

diff --git a/src/backend/executor/nodeBitmapHeapscan.c b/src/backend/executor/nodeBitmapHeapscan.c
index 83d6478bc2b..f2bb487bf10 100644
--- a/src/backend/executor/nodeBitmapHeapscan.c
+++ b/src/backend/executor/nodeBitmapHeapscan.c
@@ -79,7 +79,6 @@ typedef enum
 /* ----------------
  *	 ParallelBitmapHeapState information
  *		tbmiterator				iterator for scanning current pages
- *		mutex					mutual exclusion for state
  *		state					current state of the TIDBitmap
  *		cv						conditional wait variable
  * ----------------
@@ -87,8 +86,7 @@ typedef enum
 typedef struct ParallelBitmapHeapState
 {
 	dsa_pointer tbmiterator;
-	slock_t		mutex;
-	SharedBitmapState state;
+	pg_atomic_uint32 state;
 	ConditionVariable cv;
 } ParallelBitmapHeapState;
 
@@ -228,9 +226,7 @@ BitmapHeapNext(BitmapHeapScanState *node)
 static inline void
 BitmapDoneInitializingSharedState(ParallelBitmapHeapState *pstate)
 {
-	SpinLockAcquire(&pstate->mutex);
-	pstate->state = BM_FINISHED;
-	SpinLockRelease(&pstate->mutex);
+	pg_atomic_write_membarrier_u32(&pstate->state, BM_FINISHED);
 	ConditionVariableBroadcast(&pstate->cv);
 }
 
@@ -480,11 +476,8 @@ BitmapShouldInitializeSharedState(ParallelBitmapHeapState *pstate)
 
 	while (1)
 	{
-		SpinLockAcquire(&pstate->mutex);
-		state = pstate->state;
-		if (pstate->state == BM_INITIAL)
-			pstate->state = BM_INPROGRESS;
-		SpinLockRelease(&pstate->mutex);
+		state = BM_INITIAL;
+		pg_atomic_compare_exchange_u32(&pstate->state, &state, BM_INPROGRESS);
 
 		/* Exit if bitmap is done, or if we're the leader. */
 		if (state != BM_INPROGRESS)
@@ -538,9 +531,7 @@ ExecBitmapHeapInitializeDSM(BitmapHeapScanState *node,
 
 	pstate->tbmiterator = 0;
 
-	/* Initialize the mutex */
-	SpinLockInit(&pstate->mutex);
-	pstate->state = BM_INITIAL;
+	pg_atomic_init_u32(&pstate->state, BM_INITIAL);
 
 	ConditionVariableInit(&pstate->cv);
 
@@ -565,7 +556,7 @@ ExecBitmapHeapReInitializeDSM(BitmapHeapScanState *node,
 	if (dsa == NULL)
 		return;
 
-	pstate->state = BM_INITIAL;
+	pg_atomic_write_u32(&pstate->state, BM_INITIAL);
 
 	if (DsaPointerIsValid(pstate->tbmiterator))
 		tbm_free_shared_area(dsa, pstate->tbmiterator);
-- 
2.50.1 (Apple Git-155)


--Ot5x3ffkWEuxilWO
Content-Type: text/plain; charset=us-ascii
Content-Disposition: attachment;
	filename=v1-0003-convert-FixedParallelState-last_xlog_end-to-an-at.patch



^ permalink  raw  reply  [nested|flat] 440+ messages in thread

* [PATCH v1 2/8] convert ParallelBitmapHeapState->state to an atomic
@ 2026-07-09 18:38 Nathan Bossart <nathan@postgresql.org>
  0 siblings, 0 replies; 440+ messages in thread

From: Nathan Bossart @ 2026-07-09 18:38 UTC (permalink / raw)

---
 src/backend/executor/nodeBitmapHeapscan.c | 21 ++++++---------------
 1 file changed, 6 insertions(+), 15 deletions(-)

diff --git a/src/backend/executor/nodeBitmapHeapscan.c b/src/backend/executor/nodeBitmapHeapscan.c
index 83d6478bc2b..f2bb487bf10 100644
--- a/src/backend/executor/nodeBitmapHeapscan.c
+++ b/src/backend/executor/nodeBitmapHeapscan.c
@@ -79,7 +79,6 @@ typedef enum
 /* ----------------
  *	 ParallelBitmapHeapState information
  *		tbmiterator				iterator for scanning current pages
- *		mutex					mutual exclusion for state
  *		state					current state of the TIDBitmap
  *		cv						conditional wait variable
  * ----------------
@@ -87,8 +86,7 @@ typedef enum
 typedef struct ParallelBitmapHeapState
 {
 	dsa_pointer tbmiterator;
-	slock_t		mutex;
-	SharedBitmapState state;
+	pg_atomic_uint32 state;
 	ConditionVariable cv;
 } ParallelBitmapHeapState;
 
@@ -228,9 +226,7 @@ BitmapHeapNext(BitmapHeapScanState *node)
 static inline void
 BitmapDoneInitializingSharedState(ParallelBitmapHeapState *pstate)
 {
-	SpinLockAcquire(&pstate->mutex);
-	pstate->state = BM_FINISHED;
-	SpinLockRelease(&pstate->mutex);
+	pg_atomic_write_membarrier_u32(&pstate->state, BM_FINISHED);
 	ConditionVariableBroadcast(&pstate->cv);
 }
 
@@ -480,11 +476,8 @@ BitmapShouldInitializeSharedState(ParallelBitmapHeapState *pstate)
 
 	while (1)
 	{
-		SpinLockAcquire(&pstate->mutex);
-		state = pstate->state;
-		if (pstate->state == BM_INITIAL)
-			pstate->state = BM_INPROGRESS;
-		SpinLockRelease(&pstate->mutex);
+		state = BM_INITIAL;
+		pg_atomic_compare_exchange_u32(&pstate->state, &state, BM_INPROGRESS);
 
 		/* Exit if bitmap is done, or if we're the leader. */
 		if (state != BM_INPROGRESS)
@@ -538,9 +531,7 @@ ExecBitmapHeapInitializeDSM(BitmapHeapScanState *node,
 
 	pstate->tbmiterator = 0;
 
-	/* Initialize the mutex */
-	SpinLockInit(&pstate->mutex);
-	pstate->state = BM_INITIAL;
+	pg_atomic_init_u32(&pstate->state, BM_INITIAL);
 
 	ConditionVariableInit(&pstate->cv);
 
@@ -565,7 +556,7 @@ ExecBitmapHeapReInitializeDSM(BitmapHeapScanState *node,
 	if (dsa == NULL)
 		return;
 
-	pstate->state = BM_INITIAL;
+	pg_atomic_write_u32(&pstate->state, BM_INITIAL);
 
 	if (DsaPointerIsValid(pstate->tbmiterator))
 		tbm_free_shared_area(dsa, pstate->tbmiterator);
-- 
2.50.1 (Apple Git-155)


--Ot5x3ffkWEuxilWO
Content-Type: text/plain; charset=us-ascii
Content-Disposition: attachment;
	filename=v1-0003-convert-FixedParallelState-last_xlog_end-to-an-at.patch



^ permalink  raw  reply  [nested|flat] 440+ messages in thread

* [PATCH v1 2/8] convert ParallelBitmapHeapState->state to an atomic
@ 2026-07-09 18:38 Nathan Bossart <nathan@postgresql.org>
  0 siblings, 0 replies; 440+ messages in thread

From: Nathan Bossart @ 2026-07-09 18:38 UTC (permalink / raw)

---
 src/backend/executor/nodeBitmapHeapscan.c | 21 ++++++---------------
 1 file changed, 6 insertions(+), 15 deletions(-)

diff --git a/src/backend/executor/nodeBitmapHeapscan.c b/src/backend/executor/nodeBitmapHeapscan.c
index 83d6478bc2b..f2bb487bf10 100644
--- a/src/backend/executor/nodeBitmapHeapscan.c
+++ b/src/backend/executor/nodeBitmapHeapscan.c
@@ -79,7 +79,6 @@ typedef enum
 /* ----------------
  *	 ParallelBitmapHeapState information
  *		tbmiterator				iterator for scanning current pages
- *		mutex					mutual exclusion for state
  *		state					current state of the TIDBitmap
  *		cv						conditional wait variable
  * ----------------
@@ -87,8 +86,7 @@ typedef enum
 typedef struct ParallelBitmapHeapState
 {
 	dsa_pointer tbmiterator;
-	slock_t		mutex;
-	SharedBitmapState state;
+	pg_atomic_uint32 state;
 	ConditionVariable cv;
 } ParallelBitmapHeapState;
 
@@ -228,9 +226,7 @@ BitmapHeapNext(BitmapHeapScanState *node)
 static inline void
 BitmapDoneInitializingSharedState(ParallelBitmapHeapState *pstate)
 {
-	SpinLockAcquire(&pstate->mutex);
-	pstate->state = BM_FINISHED;
-	SpinLockRelease(&pstate->mutex);
+	pg_atomic_write_membarrier_u32(&pstate->state, BM_FINISHED);
 	ConditionVariableBroadcast(&pstate->cv);
 }
 
@@ -480,11 +476,8 @@ BitmapShouldInitializeSharedState(ParallelBitmapHeapState *pstate)
 
 	while (1)
 	{
-		SpinLockAcquire(&pstate->mutex);
-		state = pstate->state;
-		if (pstate->state == BM_INITIAL)
-			pstate->state = BM_INPROGRESS;
-		SpinLockRelease(&pstate->mutex);
+		state = BM_INITIAL;
+		pg_atomic_compare_exchange_u32(&pstate->state, &state, BM_INPROGRESS);
 
 		/* Exit if bitmap is done, or if we're the leader. */
 		if (state != BM_INPROGRESS)
@@ -538,9 +531,7 @@ ExecBitmapHeapInitializeDSM(BitmapHeapScanState *node,
 
 	pstate->tbmiterator = 0;
 
-	/* Initialize the mutex */
-	SpinLockInit(&pstate->mutex);
-	pstate->state = BM_INITIAL;
+	pg_atomic_init_u32(&pstate->state, BM_INITIAL);
 
 	ConditionVariableInit(&pstate->cv);
 
@@ -565,7 +556,7 @@ ExecBitmapHeapReInitializeDSM(BitmapHeapScanState *node,
 	if (dsa == NULL)
 		return;
 
-	pstate->state = BM_INITIAL;
+	pg_atomic_write_u32(&pstate->state, BM_INITIAL);
 
 	if (DsaPointerIsValid(pstate->tbmiterator))
 		tbm_free_shared_area(dsa, pstate->tbmiterator);
-- 
2.50.1 (Apple Git-155)


--Ot5x3ffkWEuxilWO
Content-Type: text/plain; charset=us-ascii
Content-Disposition: attachment;
	filename=v1-0003-convert-FixedParallelState-last_xlog_end-to-an-at.patch



^ permalink  raw  reply  [nested|flat] 440+ messages in thread

* [PATCH v1 2/8] convert ParallelBitmapHeapState->state to an atomic
@ 2026-07-09 18:38 Nathan Bossart <nathan@postgresql.org>
  0 siblings, 0 replies; 440+ messages in thread

From: Nathan Bossart @ 2026-07-09 18:38 UTC (permalink / raw)

---
 src/backend/executor/nodeBitmapHeapscan.c | 21 ++++++---------------
 1 file changed, 6 insertions(+), 15 deletions(-)

diff --git a/src/backend/executor/nodeBitmapHeapscan.c b/src/backend/executor/nodeBitmapHeapscan.c
index 83d6478bc2b..f2bb487bf10 100644
--- a/src/backend/executor/nodeBitmapHeapscan.c
+++ b/src/backend/executor/nodeBitmapHeapscan.c
@@ -79,7 +79,6 @@ typedef enum
 /* ----------------
  *	 ParallelBitmapHeapState information
  *		tbmiterator				iterator for scanning current pages
- *		mutex					mutual exclusion for state
  *		state					current state of the TIDBitmap
  *		cv						conditional wait variable
  * ----------------
@@ -87,8 +86,7 @@ typedef enum
 typedef struct ParallelBitmapHeapState
 {
 	dsa_pointer tbmiterator;
-	slock_t		mutex;
-	SharedBitmapState state;
+	pg_atomic_uint32 state;
 	ConditionVariable cv;
 } ParallelBitmapHeapState;
 
@@ -228,9 +226,7 @@ BitmapHeapNext(BitmapHeapScanState *node)
 static inline void
 BitmapDoneInitializingSharedState(ParallelBitmapHeapState *pstate)
 {
-	SpinLockAcquire(&pstate->mutex);
-	pstate->state = BM_FINISHED;
-	SpinLockRelease(&pstate->mutex);
+	pg_atomic_write_membarrier_u32(&pstate->state, BM_FINISHED);
 	ConditionVariableBroadcast(&pstate->cv);
 }
 
@@ -480,11 +476,8 @@ BitmapShouldInitializeSharedState(ParallelBitmapHeapState *pstate)
 
 	while (1)
 	{
-		SpinLockAcquire(&pstate->mutex);
-		state = pstate->state;
-		if (pstate->state == BM_INITIAL)
-			pstate->state = BM_INPROGRESS;
-		SpinLockRelease(&pstate->mutex);
+		state = BM_INITIAL;
+		pg_atomic_compare_exchange_u32(&pstate->state, &state, BM_INPROGRESS);
 
 		/* Exit if bitmap is done, or if we're the leader. */
 		if (state != BM_INPROGRESS)
@@ -538,9 +531,7 @@ ExecBitmapHeapInitializeDSM(BitmapHeapScanState *node,
 
 	pstate->tbmiterator = 0;
 
-	/* Initialize the mutex */
-	SpinLockInit(&pstate->mutex);
-	pstate->state = BM_INITIAL;
+	pg_atomic_init_u32(&pstate->state, BM_INITIAL);
 
 	ConditionVariableInit(&pstate->cv);
 
@@ -565,7 +556,7 @@ ExecBitmapHeapReInitializeDSM(BitmapHeapScanState *node,
 	if (dsa == NULL)
 		return;
 
-	pstate->state = BM_INITIAL;
+	pg_atomic_write_u32(&pstate->state, BM_INITIAL);
 
 	if (DsaPointerIsValid(pstate->tbmiterator))
 		tbm_free_shared_area(dsa, pstate->tbmiterator);
-- 
2.50.1 (Apple Git-155)


--Ot5x3ffkWEuxilWO
Content-Type: text/plain; charset=us-ascii
Content-Disposition: attachment;
	filename=v1-0003-convert-FixedParallelState-last_xlog_end-to-an-at.patch



^ permalink  raw  reply  [nested|flat] 440+ messages in thread

* [PATCH v2 2/9] convert ParallelBitmapHeapState->state to an atomic
@ 2026-07-09 18:38 Nathan Bossart <nathan@postgresql.org>
  0 siblings, 0 replies; 440+ messages in thread

From: Nathan Bossart @ 2026-07-09 18:38 UTC (permalink / raw)

---
 src/backend/executor/nodeBitmapHeapscan.c | 23 +++++++----------------
 1 file changed, 7 insertions(+), 16 deletions(-)

diff --git a/src/backend/executor/nodeBitmapHeapscan.c b/src/backend/executor/nodeBitmapHeapscan.c
index 83d6478bc2b..a9e83f30687 100644
--- a/src/backend/executor/nodeBitmapHeapscan.c
+++ b/src/backend/executor/nodeBitmapHeapscan.c
@@ -79,7 +79,6 @@ typedef enum
 /* ----------------
  *	 ParallelBitmapHeapState information
  *		tbmiterator				iterator for scanning current pages
- *		mutex					mutual exclusion for state
  *		state					current state of the TIDBitmap
  *		cv						conditional wait variable
  * ----------------
@@ -87,8 +86,7 @@ typedef enum
 typedef struct ParallelBitmapHeapState
 {
 	dsa_pointer tbmiterator;
-	slock_t		mutex;
-	SharedBitmapState state;
+	pg_atomic_uint32 state;
 	ConditionVariable cv;
 } ParallelBitmapHeapState;
 
@@ -228,9 +226,7 @@ BitmapHeapNext(BitmapHeapScanState *node)
 static inline void
 BitmapDoneInitializingSharedState(ParallelBitmapHeapState *pstate)
 {
-	SpinLockAcquire(&pstate->mutex);
-	pstate->state = BM_FINISHED;
-	SpinLockRelease(&pstate->mutex);
+	pg_atomic_write_membarrier_u32(&pstate->state, BM_FINISHED);
 	ConditionVariableBroadcast(&pstate->cv);
 }
 
@@ -476,15 +472,12 @@ ExecInitBitmapHeapScan(BitmapHeapScan *node, EState *estate, int eflags)
 static bool
 BitmapShouldInitializeSharedState(ParallelBitmapHeapState *pstate)
 {
-	SharedBitmapState state;
+	uint32		state;
 
 	while (1)
 	{
-		SpinLockAcquire(&pstate->mutex);
-		state = pstate->state;
-		if (pstate->state == BM_INITIAL)
-			pstate->state = BM_INPROGRESS;
-		SpinLockRelease(&pstate->mutex);
+		state = BM_INITIAL;
+		pg_atomic_compare_exchange_u32(&pstate->state, &state, BM_INPROGRESS);
 
 		/* Exit if bitmap is done, or if we're the leader. */
 		if (state != BM_INPROGRESS)
@@ -538,9 +531,7 @@ ExecBitmapHeapInitializeDSM(BitmapHeapScanState *node,
 
 	pstate->tbmiterator = 0;
 
-	/* Initialize the mutex */
-	SpinLockInit(&pstate->mutex);
-	pstate->state = BM_INITIAL;
+	pg_atomic_init_u32(&pstate->state, BM_INITIAL);
 
 	ConditionVariableInit(&pstate->cv);
 
@@ -565,7 +556,7 @@ ExecBitmapHeapReInitializeDSM(BitmapHeapScanState *node,
 	if (dsa == NULL)
 		return;
 
-	pstate->state = BM_INITIAL;
+	pg_atomic_write_u32(&pstate->state, BM_INITIAL);
 
 	if (DsaPointerIsValid(pstate->tbmiterator))
 		tbm_free_shared_area(dsa, pstate->tbmiterator);
-- 
2.50.1 (Apple Git-155)


--Xf36GNcW+0xZNily
Content-Type: text/plain; charset=us-ascii
Content-Disposition: attachment;
	filename=v2-0003-convert-FixedParallelState-last_xlog_end-to-an-at.patch



^ permalink  raw  reply  [nested|flat] 440+ messages in thread

* [PATCH v1 2/8] convert ParallelBitmapHeapState->state to an atomic
@ 2026-07-09 18:38 Nathan Bossart <nathan@postgresql.org>
  0 siblings, 0 replies; 440+ messages in thread

From: Nathan Bossart @ 2026-07-09 18:38 UTC (permalink / raw)

---
 src/backend/executor/nodeBitmapHeapscan.c | 21 ++++++---------------
 1 file changed, 6 insertions(+), 15 deletions(-)

diff --git a/src/backend/executor/nodeBitmapHeapscan.c b/src/backend/executor/nodeBitmapHeapscan.c
index 83d6478bc2b..f2bb487bf10 100644
--- a/src/backend/executor/nodeBitmapHeapscan.c
+++ b/src/backend/executor/nodeBitmapHeapscan.c
@@ -79,7 +79,6 @@ typedef enum
 /* ----------------
  *	 ParallelBitmapHeapState information
  *		tbmiterator				iterator for scanning current pages
- *		mutex					mutual exclusion for state
  *		state					current state of the TIDBitmap
  *		cv						conditional wait variable
  * ----------------
@@ -87,8 +86,7 @@ typedef enum
 typedef struct ParallelBitmapHeapState
 {
 	dsa_pointer tbmiterator;
-	slock_t		mutex;
-	SharedBitmapState state;
+	pg_atomic_uint32 state;
 	ConditionVariable cv;
 } ParallelBitmapHeapState;
 
@@ -228,9 +226,7 @@ BitmapHeapNext(BitmapHeapScanState *node)
 static inline void
 BitmapDoneInitializingSharedState(ParallelBitmapHeapState *pstate)
 {
-	SpinLockAcquire(&pstate->mutex);
-	pstate->state = BM_FINISHED;
-	SpinLockRelease(&pstate->mutex);
+	pg_atomic_write_membarrier_u32(&pstate->state, BM_FINISHED);
 	ConditionVariableBroadcast(&pstate->cv);
 }
 
@@ -480,11 +476,8 @@ BitmapShouldInitializeSharedState(ParallelBitmapHeapState *pstate)
 
 	while (1)
 	{
-		SpinLockAcquire(&pstate->mutex);
-		state = pstate->state;
-		if (pstate->state == BM_INITIAL)
-			pstate->state = BM_INPROGRESS;
-		SpinLockRelease(&pstate->mutex);
+		state = BM_INITIAL;
+		pg_atomic_compare_exchange_u32(&pstate->state, &state, BM_INPROGRESS);
 
 		/* Exit if bitmap is done, or if we're the leader. */
 		if (state != BM_INPROGRESS)
@@ -538,9 +531,7 @@ ExecBitmapHeapInitializeDSM(BitmapHeapScanState *node,
 
 	pstate->tbmiterator = 0;
 
-	/* Initialize the mutex */
-	SpinLockInit(&pstate->mutex);
-	pstate->state = BM_INITIAL;
+	pg_atomic_init_u32(&pstate->state, BM_INITIAL);
 
 	ConditionVariableInit(&pstate->cv);
 
@@ -565,7 +556,7 @@ ExecBitmapHeapReInitializeDSM(BitmapHeapScanState *node,
 	if (dsa == NULL)
 		return;
 
-	pstate->state = BM_INITIAL;
+	pg_atomic_write_u32(&pstate->state, BM_INITIAL);
 
 	if (DsaPointerIsValid(pstate->tbmiterator))
 		tbm_free_shared_area(dsa, pstate->tbmiterator);
-- 
2.50.1 (Apple Git-155)


--Ot5x3ffkWEuxilWO
Content-Type: text/plain; charset=us-ascii
Content-Disposition: attachment;
	filename=v1-0003-convert-FixedParallelState-last_xlog_end-to-an-at.patch



^ permalink  raw  reply  [nested|flat] 440+ messages in thread

* [PATCH v1 2/8] convert ParallelBitmapHeapState->state to an atomic
@ 2026-07-09 18:38 Nathan Bossart <nathan@postgresql.org>
  0 siblings, 0 replies; 440+ messages in thread

From: Nathan Bossart @ 2026-07-09 18:38 UTC (permalink / raw)

---
 src/backend/executor/nodeBitmapHeapscan.c | 21 ++++++---------------
 1 file changed, 6 insertions(+), 15 deletions(-)

diff --git a/src/backend/executor/nodeBitmapHeapscan.c b/src/backend/executor/nodeBitmapHeapscan.c
index 83d6478bc2b..f2bb487bf10 100644
--- a/src/backend/executor/nodeBitmapHeapscan.c
+++ b/src/backend/executor/nodeBitmapHeapscan.c
@@ -79,7 +79,6 @@ typedef enum
 /* ----------------
  *	 ParallelBitmapHeapState information
  *		tbmiterator				iterator for scanning current pages
- *		mutex					mutual exclusion for state
  *		state					current state of the TIDBitmap
  *		cv						conditional wait variable
  * ----------------
@@ -87,8 +86,7 @@ typedef enum
 typedef struct ParallelBitmapHeapState
 {
 	dsa_pointer tbmiterator;
-	slock_t		mutex;
-	SharedBitmapState state;
+	pg_atomic_uint32 state;
 	ConditionVariable cv;
 } ParallelBitmapHeapState;
 
@@ -228,9 +226,7 @@ BitmapHeapNext(BitmapHeapScanState *node)
 static inline void
 BitmapDoneInitializingSharedState(ParallelBitmapHeapState *pstate)
 {
-	SpinLockAcquire(&pstate->mutex);
-	pstate->state = BM_FINISHED;
-	SpinLockRelease(&pstate->mutex);
+	pg_atomic_write_membarrier_u32(&pstate->state, BM_FINISHED);
 	ConditionVariableBroadcast(&pstate->cv);
 }
 
@@ -480,11 +476,8 @@ BitmapShouldInitializeSharedState(ParallelBitmapHeapState *pstate)
 
 	while (1)
 	{
-		SpinLockAcquire(&pstate->mutex);
-		state = pstate->state;
-		if (pstate->state == BM_INITIAL)
-			pstate->state = BM_INPROGRESS;
-		SpinLockRelease(&pstate->mutex);
+		state = BM_INITIAL;
+		pg_atomic_compare_exchange_u32(&pstate->state, &state, BM_INPROGRESS);
 
 		/* Exit if bitmap is done, or if we're the leader. */
 		if (state != BM_INPROGRESS)
@@ -538,9 +531,7 @@ ExecBitmapHeapInitializeDSM(BitmapHeapScanState *node,
 
 	pstate->tbmiterator = 0;
 
-	/* Initialize the mutex */
-	SpinLockInit(&pstate->mutex);
-	pstate->state = BM_INITIAL;
+	pg_atomic_init_u32(&pstate->state, BM_INITIAL);
 
 	ConditionVariableInit(&pstate->cv);
 
@@ -565,7 +556,7 @@ ExecBitmapHeapReInitializeDSM(BitmapHeapScanState *node,
 	if (dsa == NULL)
 		return;
 
-	pstate->state = BM_INITIAL;
+	pg_atomic_write_u32(&pstate->state, BM_INITIAL);
 
 	if (DsaPointerIsValid(pstate->tbmiterator))
 		tbm_free_shared_area(dsa, pstate->tbmiterator);
-- 
2.50.1 (Apple Git-155)


--Ot5x3ffkWEuxilWO
Content-Type: text/plain; charset=us-ascii
Content-Disposition: attachment;
	filename=v1-0003-convert-FixedParallelState-last_xlog_end-to-an-at.patch



^ permalink  raw  reply  [nested|flat] 440+ messages in thread

* [PATCH v1 2/8] convert ParallelBitmapHeapState->state to an atomic
@ 2026-07-09 18:38 Nathan Bossart <nathan@postgresql.org>
  0 siblings, 0 replies; 440+ messages in thread

From: Nathan Bossart @ 2026-07-09 18:38 UTC (permalink / raw)

---
 src/backend/executor/nodeBitmapHeapscan.c | 21 ++++++---------------
 1 file changed, 6 insertions(+), 15 deletions(-)

diff --git a/src/backend/executor/nodeBitmapHeapscan.c b/src/backend/executor/nodeBitmapHeapscan.c
index 83d6478bc2b..f2bb487bf10 100644
--- a/src/backend/executor/nodeBitmapHeapscan.c
+++ b/src/backend/executor/nodeBitmapHeapscan.c
@@ -79,7 +79,6 @@ typedef enum
 /* ----------------
  *	 ParallelBitmapHeapState information
  *		tbmiterator				iterator for scanning current pages
- *		mutex					mutual exclusion for state
  *		state					current state of the TIDBitmap
  *		cv						conditional wait variable
  * ----------------
@@ -87,8 +86,7 @@ typedef enum
 typedef struct ParallelBitmapHeapState
 {
 	dsa_pointer tbmiterator;
-	slock_t		mutex;
-	SharedBitmapState state;
+	pg_atomic_uint32 state;
 	ConditionVariable cv;
 } ParallelBitmapHeapState;
 
@@ -228,9 +226,7 @@ BitmapHeapNext(BitmapHeapScanState *node)
 static inline void
 BitmapDoneInitializingSharedState(ParallelBitmapHeapState *pstate)
 {
-	SpinLockAcquire(&pstate->mutex);
-	pstate->state = BM_FINISHED;
-	SpinLockRelease(&pstate->mutex);
+	pg_atomic_write_membarrier_u32(&pstate->state, BM_FINISHED);
 	ConditionVariableBroadcast(&pstate->cv);
 }
 
@@ -480,11 +476,8 @@ BitmapShouldInitializeSharedState(ParallelBitmapHeapState *pstate)
 
 	while (1)
 	{
-		SpinLockAcquire(&pstate->mutex);
-		state = pstate->state;
-		if (pstate->state == BM_INITIAL)
-			pstate->state = BM_INPROGRESS;
-		SpinLockRelease(&pstate->mutex);
+		state = BM_INITIAL;
+		pg_atomic_compare_exchange_u32(&pstate->state, &state, BM_INPROGRESS);
 
 		/* Exit if bitmap is done, or if we're the leader. */
 		if (state != BM_INPROGRESS)
@@ -538,9 +531,7 @@ ExecBitmapHeapInitializeDSM(BitmapHeapScanState *node,
 
 	pstate->tbmiterator = 0;
 
-	/* Initialize the mutex */
-	SpinLockInit(&pstate->mutex);
-	pstate->state = BM_INITIAL;
+	pg_atomic_init_u32(&pstate->state, BM_INITIAL);
 
 	ConditionVariableInit(&pstate->cv);
 
@@ -565,7 +556,7 @@ ExecBitmapHeapReInitializeDSM(BitmapHeapScanState *node,
 	if (dsa == NULL)
 		return;
 
-	pstate->state = BM_INITIAL;
+	pg_atomic_write_u32(&pstate->state, BM_INITIAL);
 
 	if (DsaPointerIsValid(pstate->tbmiterator))
 		tbm_free_shared_area(dsa, pstate->tbmiterator);
-- 
2.50.1 (Apple Git-155)


--Ot5x3ffkWEuxilWO
Content-Type: text/plain; charset=us-ascii
Content-Disposition: attachment;
	filename=v1-0003-convert-FixedParallelState-last_xlog_end-to-an-at.patch



^ permalink  raw  reply  [nested|flat] 440+ messages in thread

* [PATCH v1 2/8] convert ParallelBitmapHeapState->state to an atomic
@ 2026-07-09 18:38 Nathan Bossart <nathan@postgresql.org>
  0 siblings, 0 replies; 440+ messages in thread

From: Nathan Bossart @ 2026-07-09 18:38 UTC (permalink / raw)

---
 src/backend/executor/nodeBitmapHeapscan.c | 21 ++++++---------------
 1 file changed, 6 insertions(+), 15 deletions(-)

diff --git a/src/backend/executor/nodeBitmapHeapscan.c b/src/backend/executor/nodeBitmapHeapscan.c
index 83d6478bc2b..f2bb487bf10 100644
--- a/src/backend/executor/nodeBitmapHeapscan.c
+++ b/src/backend/executor/nodeBitmapHeapscan.c
@@ -79,7 +79,6 @@ typedef enum
 /* ----------------
  *	 ParallelBitmapHeapState information
  *		tbmiterator				iterator for scanning current pages
- *		mutex					mutual exclusion for state
  *		state					current state of the TIDBitmap
  *		cv						conditional wait variable
  * ----------------
@@ -87,8 +86,7 @@ typedef enum
 typedef struct ParallelBitmapHeapState
 {
 	dsa_pointer tbmiterator;
-	slock_t		mutex;
-	SharedBitmapState state;
+	pg_atomic_uint32 state;
 	ConditionVariable cv;
 } ParallelBitmapHeapState;
 
@@ -228,9 +226,7 @@ BitmapHeapNext(BitmapHeapScanState *node)
 static inline void
 BitmapDoneInitializingSharedState(ParallelBitmapHeapState *pstate)
 {
-	SpinLockAcquire(&pstate->mutex);
-	pstate->state = BM_FINISHED;
-	SpinLockRelease(&pstate->mutex);
+	pg_atomic_write_membarrier_u32(&pstate->state, BM_FINISHED);
 	ConditionVariableBroadcast(&pstate->cv);
 }
 
@@ -480,11 +476,8 @@ BitmapShouldInitializeSharedState(ParallelBitmapHeapState *pstate)
 
 	while (1)
 	{
-		SpinLockAcquire(&pstate->mutex);
-		state = pstate->state;
-		if (pstate->state == BM_INITIAL)
-			pstate->state = BM_INPROGRESS;
-		SpinLockRelease(&pstate->mutex);
+		state = BM_INITIAL;
+		pg_atomic_compare_exchange_u32(&pstate->state, &state, BM_INPROGRESS);
 
 		/* Exit if bitmap is done, or if we're the leader. */
 		if (state != BM_INPROGRESS)
@@ -538,9 +531,7 @@ ExecBitmapHeapInitializeDSM(BitmapHeapScanState *node,
 
 	pstate->tbmiterator = 0;
 
-	/* Initialize the mutex */
-	SpinLockInit(&pstate->mutex);
-	pstate->state = BM_INITIAL;
+	pg_atomic_init_u32(&pstate->state, BM_INITIAL);
 
 	ConditionVariableInit(&pstate->cv);
 
@@ -565,7 +556,7 @@ ExecBitmapHeapReInitializeDSM(BitmapHeapScanState *node,
 	if (dsa == NULL)
 		return;
 
-	pstate->state = BM_INITIAL;
+	pg_atomic_write_u32(&pstate->state, BM_INITIAL);
 
 	if (DsaPointerIsValid(pstate->tbmiterator))
 		tbm_free_shared_area(dsa, pstate->tbmiterator);
-- 
2.50.1 (Apple Git-155)


--Ot5x3ffkWEuxilWO
Content-Type: text/plain; charset=us-ascii
Content-Disposition: attachment;
	filename=v1-0003-convert-FixedParallelState-last_xlog_end-to-an-at.patch



^ permalink  raw  reply  [nested|flat] 440+ messages in thread

* [PATCH v1 2/8] convert ParallelBitmapHeapState->state to an atomic
@ 2026-07-09 18:38 Nathan Bossart <nathan@postgresql.org>
  0 siblings, 0 replies; 440+ messages in thread

From: Nathan Bossart @ 2026-07-09 18:38 UTC (permalink / raw)

---
 src/backend/executor/nodeBitmapHeapscan.c | 21 ++++++---------------
 1 file changed, 6 insertions(+), 15 deletions(-)

diff --git a/src/backend/executor/nodeBitmapHeapscan.c b/src/backend/executor/nodeBitmapHeapscan.c
index 83d6478bc2b..f2bb487bf10 100644
--- a/src/backend/executor/nodeBitmapHeapscan.c
+++ b/src/backend/executor/nodeBitmapHeapscan.c
@@ -79,7 +79,6 @@ typedef enum
 /* ----------------
  *	 ParallelBitmapHeapState information
  *		tbmiterator				iterator for scanning current pages
- *		mutex					mutual exclusion for state
  *		state					current state of the TIDBitmap
  *		cv						conditional wait variable
  * ----------------
@@ -87,8 +86,7 @@ typedef enum
 typedef struct ParallelBitmapHeapState
 {
 	dsa_pointer tbmiterator;
-	slock_t		mutex;
-	SharedBitmapState state;
+	pg_atomic_uint32 state;
 	ConditionVariable cv;
 } ParallelBitmapHeapState;
 
@@ -228,9 +226,7 @@ BitmapHeapNext(BitmapHeapScanState *node)
 static inline void
 BitmapDoneInitializingSharedState(ParallelBitmapHeapState *pstate)
 {
-	SpinLockAcquire(&pstate->mutex);
-	pstate->state = BM_FINISHED;
-	SpinLockRelease(&pstate->mutex);
+	pg_atomic_write_membarrier_u32(&pstate->state, BM_FINISHED);
 	ConditionVariableBroadcast(&pstate->cv);
 }
 
@@ -480,11 +476,8 @@ BitmapShouldInitializeSharedState(ParallelBitmapHeapState *pstate)
 
 	while (1)
 	{
-		SpinLockAcquire(&pstate->mutex);
-		state = pstate->state;
-		if (pstate->state == BM_INITIAL)
-			pstate->state = BM_INPROGRESS;
-		SpinLockRelease(&pstate->mutex);
+		state = BM_INITIAL;
+		pg_atomic_compare_exchange_u32(&pstate->state, &state, BM_INPROGRESS);
 
 		/* Exit if bitmap is done, or if we're the leader. */
 		if (state != BM_INPROGRESS)
@@ -538,9 +531,7 @@ ExecBitmapHeapInitializeDSM(BitmapHeapScanState *node,
 
 	pstate->tbmiterator = 0;
 
-	/* Initialize the mutex */
-	SpinLockInit(&pstate->mutex);
-	pstate->state = BM_INITIAL;
+	pg_atomic_init_u32(&pstate->state, BM_INITIAL);
 
 	ConditionVariableInit(&pstate->cv);
 
@@ -565,7 +556,7 @@ ExecBitmapHeapReInitializeDSM(BitmapHeapScanState *node,
 	if (dsa == NULL)
 		return;
 
-	pstate->state = BM_INITIAL;
+	pg_atomic_write_u32(&pstate->state, BM_INITIAL);
 
 	if (DsaPointerIsValid(pstate->tbmiterator))
 		tbm_free_shared_area(dsa, pstate->tbmiterator);
-- 
2.50.1 (Apple Git-155)


--Ot5x3ffkWEuxilWO
Content-Type: text/plain; charset=us-ascii
Content-Disposition: attachment;
	filename=v1-0003-convert-FixedParallelState-last_xlog_end-to-an-at.patch



^ permalink  raw  reply  [nested|flat] 440+ messages in thread

* [PATCH v1 2/8] convert ParallelBitmapHeapState->state to an atomic
@ 2026-07-09 18:38 Nathan Bossart <nathan@postgresql.org>
  0 siblings, 0 replies; 440+ messages in thread

From: Nathan Bossart @ 2026-07-09 18:38 UTC (permalink / raw)

---
 src/backend/executor/nodeBitmapHeapscan.c | 21 ++++++---------------
 1 file changed, 6 insertions(+), 15 deletions(-)

diff --git a/src/backend/executor/nodeBitmapHeapscan.c b/src/backend/executor/nodeBitmapHeapscan.c
index 83d6478bc2b..f2bb487bf10 100644
--- a/src/backend/executor/nodeBitmapHeapscan.c
+++ b/src/backend/executor/nodeBitmapHeapscan.c
@@ -79,7 +79,6 @@ typedef enum
 /* ----------------
  *	 ParallelBitmapHeapState information
  *		tbmiterator				iterator for scanning current pages
- *		mutex					mutual exclusion for state
  *		state					current state of the TIDBitmap
  *		cv						conditional wait variable
  * ----------------
@@ -87,8 +86,7 @@ typedef enum
 typedef struct ParallelBitmapHeapState
 {
 	dsa_pointer tbmiterator;
-	slock_t		mutex;
-	SharedBitmapState state;
+	pg_atomic_uint32 state;
 	ConditionVariable cv;
 } ParallelBitmapHeapState;
 
@@ -228,9 +226,7 @@ BitmapHeapNext(BitmapHeapScanState *node)
 static inline void
 BitmapDoneInitializingSharedState(ParallelBitmapHeapState *pstate)
 {
-	SpinLockAcquire(&pstate->mutex);
-	pstate->state = BM_FINISHED;
-	SpinLockRelease(&pstate->mutex);
+	pg_atomic_write_membarrier_u32(&pstate->state, BM_FINISHED);
 	ConditionVariableBroadcast(&pstate->cv);
 }
 
@@ -480,11 +476,8 @@ BitmapShouldInitializeSharedState(ParallelBitmapHeapState *pstate)
 
 	while (1)
 	{
-		SpinLockAcquire(&pstate->mutex);
-		state = pstate->state;
-		if (pstate->state == BM_INITIAL)
-			pstate->state = BM_INPROGRESS;
-		SpinLockRelease(&pstate->mutex);
+		state = BM_INITIAL;
+		pg_atomic_compare_exchange_u32(&pstate->state, &state, BM_INPROGRESS);
 
 		/* Exit if bitmap is done, or if we're the leader. */
 		if (state != BM_INPROGRESS)
@@ -538,9 +531,7 @@ ExecBitmapHeapInitializeDSM(BitmapHeapScanState *node,
 
 	pstate->tbmiterator = 0;
 
-	/* Initialize the mutex */
-	SpinLockInit(&pstate->mutex);
-	pstate->state = BM_INITIAL;
+	pg_atomic_init_u32(&pstate->state, BM_INITIAL);
 
 	ConditionVariableInit(&pstate->cv);
 
@@ -565,7 +556,7 @@ ExecBitmapHeapReInitializeDSM(BitmapHeapScanState *node,
 	if (dsa == NULL)
 		return;
 
-	pstate->state = BM_INITIAL;
+	pg_atomic_write_u32(&pstate->state, BM_INITIAL);
 
 	if (DsaPointerIsValid(pstate->tbmiterator))
 		tbm_free_shared_area(dsa, pstate->tbmiterator);
-- 
2.50.1 (Apple Git-155)


--Ot5x3ffkWEuxilWO
Content-Type: text/plain; charset=us-ascii
Content-Disposition: attachment;
	filename=v1-0003-convert-FixedParallelState-last_xlog_end-to-an-at.patch



^ permalink  raw  reply  [nested|flat] 440+ messages in thread

* [PATCH v1 2/8] convert ParallelBitmapHeapState->state to an atomic
@ 2026-07-09 18:38 Nathan Bossart <nathan@postgresql.org>
  0 siblings, 0 replies; 440+ messages in thread

From: Nathan Bossart @ 2026-07-09 18:38 UTC (permalink / raw)

---
 src/backend/executor/nodeBitmapHeapscan.c | 21 ++++++---------------
 1 file changed, 6 insertions(+), 15 deletions(-)

diff --git a/src/backend/executor/nodeBitmapHeapscan.c b/src/backend/executor/nodeBitmapHeapscan.c
index 83d6478bc2b..f2bb487bf10 100644
--- a/src/backend/executor/nodeBitmapHeapscan.c
+++ b/src/backend/executor/nodeBitmapHeapscan.c
@@ -79,7 +79,6 @@ typedef enum
 /* ----------------
  *	 ParallelBitmapHeapState information
  *		tbmiterator				iterator for scanning current pages
- *		mutex					mutual exclusion for state
  *		state					current state of the TIDBitmap
  *		cv						conditional wait variable
  * ----------------
@@ -87,8 +86,7 @@ typedef enum
 typedef struct ParallelBitmapHeapState
 {
 	dsa_pointer tbmiterator;
-	slock_t		mutex;
-	SharedBitmapState state;
+	pg_atomic_uint32 state;
 	ConditionVariable cv;
 } ParallelBitmapHeapState;
 
@@ -228,9 +226,7 @@ BitmapHeapNext(BitmapHeapScanState *node)
 static inline void
 BitmapDoneInitializingSharedState(ParallelBitmapHeapState *pstate)
 {
-	SpinLockAcquire(&pstate->mutex);
-	pstate->state = BM_FINISHED;
-	SpinLockRelease(&pstate->mutex);
+	pg_atomic_write_membarrier_u32(&pstate->state, BM_FINISHED);
 	ConditionVariableBroadcast(&pstate->cv);
 }
 
@@ -480,11 +476,8 @@ BitmapShouldInitializeSharedState(ParallelBitmapHeapState *pstate)
 
 	while (1)
 	{
-		SpinLockAcquire(&pstate->mutex);
-		state = pstate->state;
-		if (pstate->state == BM_INITIAL)
-			pstate->state = BM_INPROGRESS;
-		SpinLockRelease(&pstate->mutex);
+		state = BM_INITIAL;
+		pg_atomic_compare_exchange_u32(&pstate->state, &state, BM_INPROGRESS);
 
 		/* Exit if bitmap is done, or if we're the leader. */
 		if (state != BM_INPROGRESS)
@@ -538,9 +531,7 @@ ExecBitmapHeapInitializeDSM(BitmapHeapScanState *node,
 
 	pstate->tbmiterator = 0;
 
-	/* Initialize the mutex */
-	SpinLockInit(&pstate->mutex);
-	pstate->state = BM_INITIAL;
+	pg_atomic_init_u32(&pstate->state, BM_INITIAL);
 
 	ConditionVariableInit(&pstate->cv);
 
@@ -565,7 +556,7 @@ ExecBitmapHeapReInitializeDSM(BitmapHeapScanState *node,
 	if (dsa == NULL)
 		return;
 
-	pstate->state = BM_INITIAL;
+	pg_atomic_write_u32(&pstate->state, BM_INITIAL);
 
 	if (DsaPointerIsValid(pstate->tbmiterator))
 		tbm_free_shared_area(dsa, pstate->tbmiterator);
-- 
2.50.1 (Apple Git-155)


--Ot5x3ffkWEuxilWO
Content-Type: text/plain; charset=us-ascii
Content-Disposition: attachment;
	filename=v1-0003-convert-FixedParallelState-last_xlog_end-to-an-at.patch



^ permalink  raw  reply  [nested|flat] 440+ messages in thread

* [PATCH v2 2/9] convert ParallelBitmapHeapState->state to an atomic
@ 2026-07-09 18:38 Nathan Bossart <nathan@postgresql.org>
  0 siblings, 0 replies; 440+ messages in thread

From: Nathan Bossart @ 2026-07-09 18:38 UTC (permalink / raw)

---
 src/backend/executor/nodeBitmapHeapscan.c | 23 +++++++----------------
 1 file changed, 7 insertions(+), 16 deletions(-)

diff --git a/src/backend/executor/nodeBitmapHeapscan.c b/src/backend/executor/nodeBitmapHeapscan.c
index 83d6478bc2b..a9e83f30687 100644
--- a/src/backend/executor/nodeBitmapHeapscan.c
+++ b/src/backend/executor/nodeBitmapHeapscan.c
@@ -79,7 +79,6 @@ typedef enum
 /* ----------------
  *	 ParallelBitmapHeapState information
  *		tbmiterator				iterator for scanning current pages
- *		mutex					mutual exclusion for state
  *		state					current state of the TIDBitmap
  *		cv						conditional wait variable
  * ----------------
@@ -87,8 +86,7 @@ typedef enum
 typedef struct ParallelBitmapHeapState
 {
 	dsa_pointer tbmiterator;
-	slock_t		mutex;
-	SharedBitmapState state;
+	pg_atomic_uint32 state;
 	ConditionVariable cv;
 } ParallelBitmapHeapState;
 
@@ -228,9 +226,7 @@ BitmapHeapNext(BitmapHeapScanState *node)
 static inline void
 BitmapDoneInitializingSharedState(ParallelBitmapHeapState *pstate)
 {
-	SpinLockAcquire(&pstate->mutex);
-	pstate->state = BM_FINISHED;
-	SpinLockRelease(&pstate->mutex);
+	pg_atomic_write_membarrier_u32(&pstate->state, BM_FINISHED);
 	ConditionVariableBroadcast(&pstate->cv);
 }
 
@@ -476,15 +472,12 @@ ExecInitBitmapHeapScan(BitmapHeapScan *node, EState *estate, int eflags)
 static bool
 BitmapShouldInitializeSharedState(ParallelBitmapHeapState *pstate)
 {
-	SharedBitmapState state;
+	uint32		state;
 
 	while (1)
 	{
-		SpinLockAcquire(&pstate->mutex);
-		state = pstate->state;
-		if (pstate->state == BM_INITIAL)
-			pstate->state = BM_INPROGRESS;
-		SpinLockRelease(&pstate->mutex);
+		state = BM_INITIAL;
+		pg_atomic_compare_exchange_u32(&pstate->state, &state, BM_INPROGRESS);
 
 		/* Exit if bitmap is done, or if we're the leader. */
 		if (state != BM_INPROGRESS)
@@ -538,9 +531,7 @@ ExecBitmapHeapInitializeDSM(BitmapHeapScanState *node,
 
 	pstate->tbmiterator = 0;
 
-	/* Initialize the mutex */
-	SpinLockInit(&pstate->mutex);
-	pstate->state = BM_INITIAL;
+	pg_atomic_init_u32(&pstate->state, BM_INITIAL);
 
 	ConditionVariableInit(&pstate->cv);
 
@@ -565,7 +556,7 @@ ExecBitmapHeapReInitializeDSM(BitmapHeapScanState *node,
 	if (dsa == NULL)
 		return;
 
-	pstate->state = BM_INITIAL;
+	pg_atomic_write_u32(&pstate->state, BM_INITIAL);
 
 	if (DsaPointerIsValid(pstate->tbmiterator))
 		tbm_free_shared_area(dsa, pstate->tbmiterator);
-- 
2.50.1 (Apple Git-155)


--Xf36GNcW+0xZNily
Content-Type: text/plain; charset=us-ascii
Content-Disposition: attachment;
	filename=v2-0003-convert-FixedParallelState-last_xlog_end-to-an-at.patch



^ permalink  raw  reply  [nested|flat] 440+ messages in thread

* [PATCH v2 2/9] convert ParallelBitmapHeapState->state to an atomic
@ 2026-07-09 18:38 Nathan Bossart <nathan@postgresql.org>
  0 siblings, 0 replies; 440+ messages in thread

From: Nathan Bossart @ 2026-07-09 18:38 UTC (permalink / raw)

---
 src/backend/executor/nodeBitmapHeapscan.c | 23 +++++++----------------
 1 file changed, 7 insertions(+), 16 deletions(-)

diff --git a/src/backend/executor/nodeBitmapHeapscan.c b/src/backend/executor/nodeBitmapHeapscan.c
index 83d6478bc2b..a9e83f30687 100644
--- a/src/backend/executor/nodeBitmapHeapscan.c
+++ b/src/backend/executor/nodeBitmapHeapscan.c
@@ -79,7 +79,6 @@ typedef enum
 /* ----------------
  *	 ParallelBitmapHeapState information
  *		tbmiterator				iterator for scanning current pages
- *		mutex					mutual exclusion for state
  *		state					current state of the TIDBitmap
  *		cv						conditional wait variable
  * ----------------
@@ -87,8 +86,7 @@ typedef enum
 typedef struct ParallelBitmapHeapState
 {
 	dsa_pointer tbmiterator;
-	slock_t		mutex;
-	SharedBitmapState state;
+	pg_atomic_uint32 state;
 	ConditionVariable cv;
 } ParallelBitmapHeapState;
 
@@ -228,9 +226,7 @@ BitmapHeapNext(BitmapHeapScanState *node)
 static inline void
 BitmapDoneInitializingSharedState(ParallelBitmapHeapState *pstate)
 {
-	SpinLockAcquire(&pstate->mutex);
-	pstate->state = BM_FINISHED;
-	SpinLockRelease(&pstate->mutex);
+	pg_atomic_write_membarrier_u32(&pstate->state, BM_FINISHED);
 	ConditionVariableBroadcast(&pstate->cv);
 }
 
@@ -476,15 +472,12 @@ ExecInitBitmapHeapScan(BitmapHeapScan *node, EState *estate, int eflags)
 static bool
 BitmapShouldInitializeSharedState(ParallelBitmapHeapState *pstate)
 {
-	SharedBitmapState state;
+	uint32		state;
 
 	while (1)
 	{
-		SpinLockAcquire(&pstate->mutex);
-		state = pstate->state;
-		if (pstate->state == BM_INITIAL)
-			pstate->state = BM_INPROGRESS;
-		SpinLockRelease(&pstate->mutex);
+		state = BM_INITIAL;
+		pg_atomic_compare_exchange_u32(&pstate->state, &state, BM_INPROGRESS);
 
 		/* Exit if bitmap is done, or if we're the leader. */
 		if (state != BM_INPROGRESS)
@@ -538,9 +531,7 @@ ExecBitmapHeapInitializeDSM(BitmapHeapScanState *node,
 
 	pstate->tbmiterator = 0;
 
-	/* Initialize the mutex */
-	SpinLockInit(&pstate->mutex);
-	pstate->state = BM_INITIAL;
+	pg_atomic_init_u32(&pstate->state, BM_INITIAL);
 
 	ConditionVariableInit(&pstate->cv);
 
@@ -565,7 +556,7 @@ ExecBitmapHeapReInitializeDSM(BitmapHeapScanState *node,
 	if (dsa == NULL)
 		return;
 
-	pstate->state = BM_INITIAL;
+	pg_atomic_write_u32(&pstate->state, BM_INITIAL);
 
 	if (DsaPointerIsValid(pstate->tbmiterator))
 		tbm_free_shared_area(dsa, pstate->tbmiterator);
-- 
2.50.1 (Apple Git-155)


--Xf36GNcW+0xZNily
Content-Type: text/plain; charset=us-ascii
Content-Disposition: attachment;
	filename=v2-0003-convert-FixedParallelState-last_xlog_end-to-an-at.patch



^ permalink  raw  reply  [nested|flat] 440+ messages in thread

* [PATCH v2 2/9] convert ParallelBitmapHeapState->state to an atomic
@ 2026-07-09 18:38 Nathan Bossart <nathan@postgresql.org>
  0 siblings, 0 replies; 440+ messages in thread

From: Nathan Bossart @ 2026-07-09 18:38 UTC (permalink / raw)

---
 src/backend/executor/nodeBitmapHeapscan.c | 23 +++++++----------------
 1 file changed, 7 insertions(+), 16 deletions(-)

diff --git a/src/backend/executor/nodeBitmapHeapscan.c b/src/backend/executor/nodeBitmapHeapscan.c
index 83d6478bc2b..a9e83f30687 100644
--- a/src/backend/executor/nodeBitmapHeapscan.c
+++ b/src/backend/executor/nodeBitmapHeapscan.c
@@ -79,7 +79,6 @@ typedef enum
 /* ----------------
  *	 ParallelBitmapHeapState information
  *		tbmiterator				iterator for scanning current pages
- *		mutex					mutual exclusion for state
  *		state					current state of the TIDBitmap
  *		cv						conditional wait variable
  * ----------------
@@ -87,8 +86,7 @@ typedef enum
 typedef struct ParallelBitmapHeapState
 {
 	dsa_pointer tbmiterator;
-	slock_t		mutex;
-	SharedBitmapState state;
+	pg_atomic_uint32 state;
 	ConditionVariable cv;
 } ParallelBitmapHeapState;
 
@@ -228,9 +226,7 @@ BitmapHeapNext(BitmapHeapScanState *node)
 static inline void
 BitmapDoneInitializingSharedState(ParallelBitmapHeapState *pstate)
 {
-	SpinLockAcquire(&pstate->mutex);
-	pstate->state = BM_FINISHED;
-	SpinLockRelease(&pstate->mutex);
+	pg_atomic_write_membarrier_u32(&pstate->state, BM_FINISHED);
 	ConditionVariableBroadcast(&pstate->cv);
 }
 
@@ -476,15 +472,12 @@ ExecInitBitmapHeapScan(BitmapHeapScan *node, EState *estate, int eflags)
 static bool
 BitmapShouldInitializeSharedState(ParallelBitmapHeapState *pstate)
 {
-	SharedBitmapState state;
+	uint32		state;
 
 	while (1)
 	{
-		SpinLockAcquire(&pstate->mutex);
-		state = pstate->state;
-		if (pstate->state == BM_INITIAL)
-			pstate->state = BM_INPROGRESS;
-		SpinLockRelease(&pstate->mutex);
+		state = BM_INITIAL;
+		pg_atomic_compare_exchange_u32(&pstate->state, &state, BM_INPROGRESS);
 
 		/* Exit if bitmap is done, or if we're the leader. */
 		if (state != BM_INPROGRESS)
@@ -538,9 +531,7 @@ ExecBitmapHeapInitializeDSM(BitmapHeapScanState *node,
 
 	pstate->tbmiterator = 0;
 
-	/* Initialize the mutex */
-	SpinLockInit(&pstate->mutex);
-	pstate->state = BM_INITIAL;
+	pg_atomic_init_u32(&pstate->state, BM_INITIAL);
 
 	ConditionVariableInit(&pstate->cv);
 
@@ -565,7 +556,7 @@ ExecBitmapHeapReInitializeDSM(BitmapHeapScanState *node,
 	if (dsa == NULL)
 		return;
 
-	pstate->state = BM_INITIAL;
+	pg_atomic_write_u32(&pstate->state, BM_INITIAL);
 
 	if (DsaPointerIsValid(pstate->tbmiterator))
 		tbm_free_shared_area(dsa, pstate->tbmiterator);
-- 
2.50.1 (Apple Git-155)


--Xf36GNcW+0xZNily
Content-Type: text/plain; charset=us-ascii
Content-Disposition: attachment;
	filename=v2-0003-convert-FixedParallelState-last_xlog_end-to-an-at.patch



^ permalink  raw  reply  [nested|flat] 440+ messages in thread

* [PATCH v1 2/8] convert ParallelBitmapHeapState->state to an atomic
@ 2026-07-09 18:38 Nathan Bossart <nathan@postgresql.org>
  0 siblings, 0 replies; 440+ messages in thread

From: Nathan Bossart @ 2026-07-09 18:38 UTC (permalink / raw)

---
 src/backend/executor/nodeBitmapHeapscan.c | 21 ++++++---------------
 1 file changed, 6 insertions(+), 15 deletions(-)

diff --git a/src/backend/executor/nodeBitmapHeapscan.c b/src/backend/executor/nodeBitmapHeapscan.c
index 83d6478bc2b..f2bb487bf10 100644
--- a/src/backend/executor/nodeBitmapHeapscan.c
+++ b/src/backend/executor/nodeBitmapHeapscan.c
@@ -79,7 +79,6 @@ typedef enum
 /* ----------------
  *	 ParallelBitmapHeapState information
  *		tbmiterator				iterator for scanning current pages
- *		mutex					mutual exclusion for state
  *		state					current state of the TIDBitmap
  *		cv						conditional wait variable
  * ----------------
@@ -87,8 +86,7 @@ typedef enum
 typedef struct ParallelBitmapHeapState
 {
 	dsa_pointer tbmiterator;
-	slock_t		mutex;
-	SharedBitmapState state;
+	pg_atomic_uint32 state;
 	ConditionVariable cv;
 } ParallelBitmapHeapState;
 
@@ -228,9 +226,7 @@ BitmapHeapNext(BitmapHeapScanState *node)
 static inline void
 BitmapDoneInitializingSharedState(ParallelBitmapHeapState *pstate)
 {
-	SpinLockAcquire(&pstate->mutex);
-	pstate->state = BM_FINISHED;
-	SpinLockRelease(&pstate->mutex);
+	pg_atomic_write_membarrier_u32(&pstate->state, BM_FINISHED);
 	ConditionVariableBroadcast(&pstate->cv);
 }
 
@@ -480,11 +476,8 @@ BitmapShouldInitializeSharedState(ParallelBitmapHeapState *pstate)
 
 	while (1)
 	{
-		SpinLockAcquire(&pstate->mutex);
-		state = pstate->state;
-		if (pstate->state == BM_INITIAL)
-			pstate->state = BM_INPROGRESS;
-		SpinLockRelease(&pstate->mutex);
+		state = BM_INITIAL;
+		pg_atomic_compare_exchange_u32(&pstate->state, &state, BM_INPROGRESS);
 
 		/* Exit if bitmap is done, or if we're the leader. */
 		if (state != BM_INPROGRESS)
@@ -538,9 +531,7 @@ ExecBitmapHeapInitializeDSM(BitmapHeapScanState *node,
 
 	pstate->tbmiterator = 0;
 
-	/* Initialize the mutex */
-	SpinLockInit(&pstate->mutex);
-	pstate->state = BM_INITIAL;
+	pg_atomic_init_u32(&pstate->state, BM_INITIAL);
 
 	ConditionVariableInit(&pstate->cv);
 
@@ -565,7 +556,7 @@ ExecBitmapHeapReInitializeDSM(BitmapHeapScanState *node,
 	if (dsa == NULL)
 		return;
 
-	pstate->state = BM_INITIAL;
+	pg_atomic_write_u32(&pstate->state, BM_INITIAL);
 
 	if (DsaPointerIsValid(pstate->tbmiterator))
 		tbm_free_shared_area(dsa, pstate->tbmiterator);
-- 
2.50.1 (Apple Git-155)


--Ot5x3ffkWEuxilWO
Content-Type: text/plain; charset=us-ascii
Content-Disposition: attachment;
	filename=v1-0003-convert-FixedParallelState-last_xlog_end-to-an-at.patch



^ permalink  raw  reply  [nested|flat] 440+ messages in thread

* [PATCH v1 2/8] convert ParallelBitmapHeapState->state to an atomic
@ 2026-07-09 18:38 Nathan Bossart <nathan@postgresql.org>
  0 siblings, 0 replies; 440+ messages in thread

From: Nathan Bossart @ 2026-07-09 18:38 UTC (permalink / raw)

---
 src/backend/executor/nodeBitmapHeapscan.c | 21 ++++++---------------
 1 file changed, 6 insertions(+), 15 deletions(-)

diff --git a/src/backend/executor/nodeBitmapHeapscan.c b/src/backend/executor/nodeBitmapHeapscan.c
index 83d6478bc2b..f2bb487bf10 100644
--- a/src/backend/executor/nodeBitmapHeapscan.c
+++ b/src/backend/executor/nodeBitmapHeapscan.c
@@ -79,7 +79,6 @@ typedef enum
 /* ----------------
  *	 ParallelBitmapHeapState information
  *		tbmiterator				iterator for scanning current pages
- *		mutex					mutual exclusion for state
  *		state					current state of the TIDBitmap
  *		cv						conditional wait variable
  * ----------------
@@ -87,8 +86,7 @@ typedef enum
 typedef struct ParallelBitmapHeapState
 {
 	dsa_pointer tbmiterator;
-	slock_t		mutex;
-	SharedBitmapState state;
+	pg_atomic_uint32 state;
 	ConditionVariable cv;
 } ParallelBitmapHeapState;
 
@@ -228,9 +226,7 @@ BitmapHeapNext(BitmapHeapScanState *node)
 static inline void
 BitmapDoneInitializingSharedState(ParallelBitmapHeapState *pstate)
 {
-	SpinLockAcquire(&pstate->mutex);
-	pstate->state = BM_FINISHED;
-	SpinLockRelease(&pstate->mutex);
+	pg_atomic_write_membarrier_u32(&pstate->state, BM_FINISHED);
 	ConditionVariableBroadcast(&pstate->cv);
 }
 
@@ -480,11 +476,8 @@ BitmapShouldInitializeSharedState(ParallelBitmapHeapState *pstate)
 
 	while (1)
 	{
-		SpinLockAcquire(&pstate->mutex);
-		state = pstate->state;
-		if (pstate->state == BM_INITIAL)
-			pstate->state = BM_INPROGRESS;
-		SpinLockRelease(&pstate->mutex);
+		state = BM_INITIAL;
+		pg_atomic_compare_exchange_u32(&pstate->state, &state, BM_INPROGRESS);
 
 		/* Exit if bitmap is done, or if we're the leader. */
 		if (state != BM_INPROGRESS)
@@ -538,9 +531,7 @@ ExecBitmapHeapInitializeDSM(BitmapHeapScanState *node,
 
 	pstate->tbmiterator = 0;
 
-	/* Initialize the mutex */
-	SpinLockInit(&pstate->mutex);
-	pstate->state = BM_INITIAL;
+	pg_atomic_init_u32(&pstate->state, BM_INITIAL);
 
 	ConditionVariableInit(&pstate->cv);
 
@@ -565,7 +556,7 @@ ExecBitmapHeapReInitializeDSM(BitmapHeapScanState *node,
 	if (dsa == NULL)
 		return;
 
-	pstate->state = BM_INITIAL;
+	pg_atomic_write_u32(&pstate->state, BM_INITIAL);
 
 	if (DsaPointerIsValid(pstate->tbmiterator))
 		tbm_free_shared_area(dsa, pstate->tbmiterator);
-- 
2.50.1 (Apple Git-155)


--Ot5x3ffkWEuxilWO
Content-Type: text/plain; charset=us-ascii
Content-Disposition: attachment;
	filename=v1-0003-convert-FixedParallelState-last_xlog_end-to-an-at.patch



^ permalink  raw  reply  [nested|flat] 440+ messages in thread

* [PATCH v1 2/8] convert ParallelBitmapHeapState->state to an atomic
@ 2026-07-09 18:38 Nathan Bossart <nathan@postgresql.org>
  0 siblings, 0 replies; 440+ messages in thread

From: Nathan Bossart @ 2026-07-09 18:38 UTC (permalink / raw)

---
 src/backend/executor/nodeBitmapHeapscan.c | 21 ++++++---------------
 1 file changed, 6 insertions(+), 15 deletions(-)

diff --git a/src/backend/executor/nodeBitmapHeapscan.c b/src/backend/executor/nodeBitmapHeapscan.c
index 83d6478bc2b..f2bb487bf10 100644
--- a/src/backend/executor/nodeBitmapHeapscan.c
+++ b/src/backend/executor/nodeBitmapHeapscan.c
@@ -79,7 +79,6 @@ typedef enum
 /* ----------------
  *	 ParallelBitmapHeapState information
  *		tbmiterator				iterator for scanning current pages
- *		mutex					mutual exclusion for state
  *		state					current state of the TIDBitmap
  *		cv						conditional wait variable
  * ----------------
@@ -87,8 +86,7 @@ typedef enum
 typedef struct ParallelBitmapHeapState
 {
 	dsa_pointer tbmiterator;
-	slock_t		mutex;
-	SharedBitmapState state;
+	pg_atomic_uint32 state;
 	ConditionVariable cv;
 } ParallelBitmapHeapState;
 
@@ -228,9 +226,7 @@ BitmapHeapNext(BitmapHeapScanState *node)
 static inline void
 BitmapDoneInitializingSharedState(ParallelBitmapHeapState *pstate)
 {
-	SpinLockAcquire(&pstate->mutex);
-	pstate->state = BM_FINISHED;
-	SpinLockRelease(&pstate->mutex);
+	pg_atomic_write_membarrier_u32(&pstate->state, BM_FINISHED);
 	ConditionVariableBroadcast(&pstate->cv);
 }
 
@@ -480,11 +476,8 @@ BitmapShouldInitializeSharedState(ParallelBitmapHeapState *pstate)
 
 	while (1)
 	{
-		SpinLockAcquire(&pstate->mutex);
-		state = pstate->state;
-		if (pstate->state == BM_INITIAL)
-			pstate->state = BM_INPROGRESS;
-		SpinLockRelease(&pstate->mutex);
+		state = BM_INITIAL;
+		pg_atomic_compare_exchange_u32(&pstate->state, &state, BM_INPROGRESS);
 
 		/* Exit if bitmap is done, or if we're the leader. */
 		if (state != BM_INPROGRESS)
@@ -538,9 +531,7 @@ ExecBitmapHeapInitializeDSM(BitmapHeapScanState *node,
 
 	pstate->tbmiterator = 0;
 
-	/* Initialize the mutex */
-	SpinLockInit(&pstate->mutex);
-	pstate->state = BM_INITIAL;
+	pg_atomic_init_u32(&pstate->state, BM_INITIAL);
 
 	ConditionVariableInit(&pstate->cv);
 
@@ -565,7 +556,7 @@ ExecBitmapHeapReInitializeDSM(BitmapHeapScanState *node,
 	if (dsa == NULL)
 		return;
 
-	pstate->state = BM_INITIAL;
+	pg_atomic_write_u32(&pstate->state, BM_INITIAL);
 
 	if (DsaPointerIsValid(pstate->tbmiterator))
 		tbm_free_shared_area(dsa, pstate->tbmiterator);
-- 
2.50.1 (Apple Git-155)


--Ot5x3ffkWEuxilWO
Content-Type: text/plain; charset=us-ascii
Content-Disposition: attachment;
	filename=v1-0003-convert-FixedParallelState-last_xlog_end-to-an-at.patch



^ permalink  raw  reply  [nested|flat] 440+ messages in thread

* [PATCH v1 2/8] convert ParallelBitmapHeapState->state to an atomic
@ 2026-07-09 18:38 Nathan Bossart <nathan@postgresql.org>
  0 siblings, 0 replies; 440+ messages in thread

From: Nathan Bossart @ 2026-07-09 18:38 UTC (permalink / raw)

---
 src/backend/executor/nodeBitmapHeapscan.c | 21 ++++++---------------
 1 file changed, 6 insertions(+), 15 deletions(-)

diff --git a/src/backend/executor/nodeBitmapHeapscan.c b/src/backend/executor/nodeBitmapHeapscan.c
index 83d6478bc2b..f2bb487bf10 100644
--- a/src/backend/executor/nodeBitmapHeapscan.c
+++ b/src/backend/executor/nodeBitmapHeapscan.c
@@ -79,7 +79,6 @@ typedef enum
 /* ----------------
  *	 ParallelBitmapHeapState information
  *		tbmiterator				iterator for scanning current pages
- *		mutex					mutual exclusion for state
  *		state					current state of the TIDBitmap
  *		cv						conditional wait variable
  * ----------------
@@ -87,8 +86,7 @@ typedef enum
 typedef struct ParallelBitmapHeapState
 {
 	dsa_pointer tbmiterator;
-	slock_t		mutex;
-	SharedBitmapState state;
+	pg_atomic_uint32 state;
 	ConditionVariable cv;
 } ParallelBitmapHeapState;
 
@@ -228,9 +226,7 @@ BitmapHeapNext(BitmapHeapScanState *node)
 static inline void
 BitmapDoneInitializingSharedState(ParallelBitmapHeapState *pstate)
 {
-	SpinLockAcquire(&pstate->mutex);
-	pstate->state = BM_FINISHED;
-	SpinLockRelease(&pstate->mutex);
+	pg_atomic_write_membarrier_u32(&pstate->state, BM_FINISHED);
 	ConditionVariableBroadcast(&pstate->cv);
 }
 
@@ -480,11 +476,8 @@ BitmapShouldInitializeSharedState(ParallelBitmapHeapState *pstate)
 
 	while (1)
 	{
-		SpinLockAcquire(&pstate->mutex);
-		state = pstate->state;
-		if (pstate->state == BM_INITIAL)
-			pstate->state = BM_INPROGRESS;
-		SpinLockRelease(&pstate->mutex);
+		state = BM_INITIAL;
+		pg_atomic_compare_exchange_u32(&pstate->state, &state, BM_INPROGRESS);
 
 		/* Exit if bitmap is done, or if we're the leader. */
 		if (state != BM_INPROGRESS)
@@ -538,9 +531,7 @@ ExecBitmapHeapInitializeDSM(BitmapHeapScanState *node,
 
 	pstate->tbmiterator = 0;
 
-	/* Initialize the mutex */
-	SpinLockInit(&pstate->mutex);
-	pstate->state = BM_INITIAL;
+	pg_atomic_init_u32(&pstate->state, BM_INITIAL);
 
 	ConditionVariableInit(&pstate->cv);
 
@@ -565,7 +556,7 @@ ExecBitmapHeapReInitializeDSM(BitmapHeapScanState *node,
 	if (dsa == NULL)
 		return;
 
-	pstate->state = BM_INITIAL;
+	pg_atomic_write_u32(&pstate->state, BM_INITIAL);
 
 	if (DsaPointerIsValid(pstate->tbmiterator))
 		tbm_free_shared_area(dsa, pstate->tbmiterator);
-- 
2.50.1 (Apple Git-155)


--Ot5x3ffkWEuxilWO
Content-Type: text/plain; charset=us-ascii
Content-Disposition: attachment;
	filename=v1-0003-convert-FixedParallelState-last_xlog_end-to-an-at.patch



^ permalink  raw  reply  [nested|flat] 440+ messages in thread

* [PATCH v1 2/8] convert ParallelBitmapHeapState->state to an atomic
@ 2026-07-09 18:38 Nathan Bossart <nathan@postgresql.org>
  0 siblings, 0 replies; 440+ messages in thread

From: Nathan Bossart @ 2026-07-09 18:38 UTC (permalink / raw)

---
 src/backend/executor/nodeBitmapHeapscan.c | 21 ++++++---------------
 1 file changed, 6 insertions(+), 15 deletions(-)

diff --git a/src/backend/executor/nodeBitmapHeapscan.c b/src/backend/executor/nodeBitmapHeapscan.c
index 83d6478bc2b..f2bb487bf10 100644
--- a/src/backend/executor/nodeBitmapHeapscan.c
+++ b/src/backend/executor/nodeBitmapHeapscan.c
@@ -79,7 +79,6 @@ typedef enum
 /* ----------------
  *	 ParallelBitmapHeapState information
  *		tbmiterator				iterator for scanning current pages
- *		mutex					mutual exclusion for state
  *		state					current state of the TIDBitmap
  *		cv						conditional wait variable
  * ----------------
@@ -87,8 +86,7 @@ typedef enum
 typedef struct ParallelBitmapHeapState
 {
 	dsa_pointer tbmiterator;
-	slock_t		mutex;
-	SharedBitmapState state;
+	pg_atomic_uint32 state;
 	ConditionVariable cv;
 } ParallelBitmapHeapState;
 
@@ -228,9 +226,7 @@ BitmapHeapNext(BitmapHeapScanState *node)
 static inline void
 BitmapDoneInitializingSharedState(ParallelBitmapHeapState *pstate)
 {
-	SpinLockAcquire(&pstate->mutex);
-	pstate->state = BM_FINISHED;
-	SpinLockRelease(&pstate->mutex);
+	pg_atomic_write_membarrier_u32(&pstate->state, BM_FINISHED);
 	ConditionVariableBroadcast(&pstate->cv);
 }
 
@@ -480,11 +476,8 @@ BitmapShouldInitializeSharedState(ParallelBitmapHeapState *pstate)
 
 	while (1)
 	{
-		SpinLockAcquire(&pstate->mutex);
-		state = pstate->state;
-		if (pstate->state == BM_INITIAL)
-			pstate->state = BM_INPROGRESS;
-		SpinLockRelease(&pstate->mutex);
+		state = BM_INITIAL;
+		pg_atomic_compare_exchange_u32(&pstate->state, &state, BM_INPROGRESS);
 
 		/* Exit if bitmap is done, or if we're the leader. */
 		if (state != BM_INPROGRESS)
@@ -538,9 +531,7 @@ ExecBitmapHeapInitializeDSM(BitmapHeapScanState *node,
 
 	pstate->tbmiterator = 0;
 
-	/* Initialize the mutex */
-	SpinLockInit(&pstate->mutex);
-	pstate->state = BM_INITIAL;
+	pg_atomic_init_u32(&pstate->state, BM_INITIAL);
 
 	ConditionVariableInit(&pstate->cv);
 
@@ -565,7 +556,7 @@ ExecBitmapHeapReInitializeDSM(BitmapHeapScanState *node,
 	if (dsa == NULL)
 		return;
 
-	pstate->state = BM_INITIAL;
+	pg_atomic_write_u32(&pstate->state, BM_INITIAL);
 
 	if (DsaPointerIsValid(pstate->tbmiterator))
 		tbm_free_shared_area(dsa, pstate->tbmiterator);
-- 
2.50.1 (Apple Git-155)


--Ot5x3ffkWEuxilWO
Content-Type: text/plain; charset=us-ascii
Content-Disposition: attachment;
	filename=v1-0003-convert-FixedParallelState-last_xlog_end-to-an-at.patch



^ permalink  raw  reply  [nested|flat] 440+ messages in thread

* [PATCH v2 2/9] convert ParallelBitmapHeapState->state to an atomic
@ 2026-07-09 18:38 Nathan Bossart <nathan@postgresql.org>
  0 siblings, 0 replies; 440+ messages in thread

From: Nathan Bossart @ 2026-07-09 18:38 UTC (permalink / raw)

---
 src/backend/executor/nodeBitmapHeapscan.c | 23 +++++++----------------
 1 file changed, 7 insertions(+), 16 deletions(-)

diff --git a/src/backend/executor/nodeBitmapHeapscan.c b/src/backend/executor/nodeBitmapHeapscan.c
index 83d6478bc2b..a9e83f30687 100644
--- a/src/backend/executor/nodeBitmapHeapscan.c
+++ b/src/backend/executor/nodeBitmapHeapscan.c
@@ -79,7 +79,6 @@ typedef enum
 /* ----------------
  *	 ParallelBitmapHeapState information
  *		tbmiterator				iterator for scanning current pages
- *		mutex					mutual exclusion for state
  *		state					current state of the TIDBitmap
  *		cv						conditional wait variable
  * ----------------
@@ -87,8 +86,7 @@ typedef enum
 typedef struct ParallelBitmapHeapState
 {
 	dsa_pointer tbmiterator;
-	slock_t		mutex;
-	SharedBitmapState state;
+	pg_atomic_uint32 state;
 	ConditionVariable cv;
 } ParallelBitmapHeapState;
 
@@ -228,9 +226,7 @@ BitmapHeapNext(BitmapHeapScanState *node)
 static inline void
 BitmapDoneInitializingSharedState(ParallelBitmapHeapState *pstate)
 {
-	SpinLockAcquire(&pstate->mutex);
-	pstate->state = BM_FINISHED;
-	SpinLockRelease(&pstate->mutex);
+	pg_atomic_write_membarrier_u32(&pstate->state, BM_FINISHED);
 	ConditionVariableBroadcast(&pstate->cv);
 }
 
@@ -476,15 +472,12 @@ ExecInitBitmapHeapScan(BitmapHeapScan *node, EState *estate, int eflags)
 static bool
 BitmapShouldInitializeSharedState(ParallelBitmapHeapState *pstate)
 {
-	SharedBitmapState state;
+	uint32		state;
 
 	while (1)
 	{
-		SpinLockAcquire(&pstate->mutex);
-		state = pstate->state;
-		if (pstate->state == BM_INITIAL)
-			pstate->state = BM_INPROGRESS;
-		SpinLockRelease(&pstate->mutex);
+		state = BM_INITIAL;
+		pg_atomic_compare_exchange_u32(&pstate->state, &state, BM_INPROGRESS);
 
 		/* Exit if bitmap is done, or if we're the leader. */
 		if (state != BM_INPROGRESS)
@@ -538,9 +531,7 @@ ExecBitmapHeapInitializeDSM(BitmapHeapScanState *node,
 
 	pstate->tbmiterator = 0;
 
-	/* Initialize the mutex */
-	SpinLockInit(&pstate->mutex);
-	pstate->state = BM_INITIAL;
+	pg_atomic_init_u32(&pstate->state, BM_INITIAL);
 
 	ConditionVariableInit(&pstate->cv);
 
@@ -565,7 +556,7 @@ ExecBitmapHeapReInitializeDSM(BitmapHeapScanState *node,
 	if (dsa == NULL)
 		return;
 
-	pstate->state = BM_INITIAL;
+	pg_atomic_write_u32(&pstate->state, BM_INITIAL);
 
 	if (DsaPointerIsValid(pstate->tbmiterator))
 		tbm_free_shared_area(dsa, pstate->tbmiterator);
-- 
2.50.1 (Apple Git-155)


--Xf36GNcW+0xZNily
Content-Type: text/plain; charset=us-ascii
Content-Disposition: attachment;
	filename=v2-0003-convert-FixedParallelState-last_xlog_end-to-an-at.patch



^ permalink  raw  reply  [nested|flat] 440+ messages in thread

* [PATCH v1 2/8] convert ParallelBitmapHeapState->state to an atomic
@ 2026-07-09 18:38 Nathan Bossart <nathan@postgresql.org>
  0 siblings, 0 replies; 440+ messages in thread

From: Nathan Bossart @ 2026-07-09 18:38 UTC (permalink / raw)

---
 src/backend/executor/nodeBitmapHeapscan.c | 21 ++++++---------------
 1 file changed, 6 insertions(+), 15 deletions(-)

diff --git a/src/backend/executor/nodeBitmapHeapscan.c b/src/backend/executor/nodeBitmapHeapscan.c
index 83d6478bc2b..f2bb487bf10 100644
--- a/src/backend/executor/nodeBitmapHeapscan.c
+++ b/src/backend/executor/nodeBitmapHeapscan.c
@@ -79,7 +79,6 @@ typedef enum
 /* ----------------
  *	 ParallelBitmapHeapState information
  *		tbmiterator				iterator for scanning current pages
- *		mutex					mutual exclusion for state
  *		state					current state of the TIDBitmap
  *		cv						conditional wait variable
  * ----------------
@@ -87,8 +86,7 @@ typedef enum
 typedef struct ParallelBitmapHeapState
 {
 	dsa_pointer tbmiterator;
-	slock_t		mutex;
-	SharedBitmapState state;
+	pg_atomic_uint32 state;
 	ConditionVariable cv;
 } ParallelBitmapHeapState;
 
@@ -228,9 +226,7 @@ BitmapHeapNext(BitmapHeapScanState *node)
 static inline void
 BitmapDoneInitializingSharedState(ParallelBitmapHeapState *pstate)
 {
-	SpinLockAcquire(&pstate->mutex);
-	pstate->state = BM_FINISHED;
-	SpinLockRelease(&pstate->mutex);
+	pg_atomic_write_membarrier_u32(&pstate->state, BM_FINISHED);
 	ConditionVariableBroadcast(&pstate->cv);
 }
 
@@ -480,11 +476,8 @@ BitmapShouldInitializeSharedState(ParallelBitmapHeapState *pstate)
 
 	while (1)
 	{
-		SpinLockAcquire(&pstate->mutex);
-		state = pstate->state;
-		if (pstate->state == BM_INITIAL)
-			pstate->state = BM_INPROGRESS;
-		SpinLockRelease(&pstate->mutex);
+		state = BM_INITIAL;
+		pg_atomic_compare_exchange_u32(&pstate->state, &state, BM_INPROGRESS);
 
 		/* Exit if bitmap is done, or if we're the leader. */
 		if (state != BM_INPROGRESS)
@@ -538,9 +531,7 @@ ExecBitmapHeapInitializeDSM(BitmapHeapScanState *node,
 
 	pstate->tbmiterator = 0;
 
-	/* Initialize the mutex */
-	SpinLockInit(&pstate->mutex);
-	pstate->state = BM_INITIAL;
+	pg_atomic_init_u32(&pstate->state, BM_INITIAL);
 
 	ConditionVariableInit(&pstate->cv);
 
@@ -565,7 +556,7 @@ ExecBitmapHeapReInitializeDSM(BitmapHeapScanState *node,
 	if (dsa == NULL)
 		return;
 
-	pstate->state = BM_INITIAL;
+	pg_atomic_write_u32(&pstate->state, BM_INITIAL);
 
 	if (DsaPointerIsValid(pstate->tbmiterator))
 		tbm_free_shared_area(dsa, pstate->tbmiterator);
-- 
2.50.1 (Apple Git-155)


--Ot5x3ffkWEuxilWO
Content-Type: text/plain; charset=us-ascii
Content-Disposition: attachment;
	filename=v1-0003-convert-FixedParallelState-last_xlog_end-to-an-at.patch



^ permalink  raw  reply  [nested|flat] 440+ messages in thread

* [PATCH v1 2/8] convert ParallelBitmapHeapState->state to an atomic
@ 2026-07-09 18:38 Nathan Bossart <nathan@postgresql.org>
  0 siblings, 0 replies; 440+ messages in thread

From: Nathan Bossart @ 2026-07-09 18:38 UTC (permalink / raw)

---
 src/backend/executor/nodeBitmapHeapscan.c | 21 ++++++---------------
 1 file changed, 6 insertions(+), 15 deletions(-)

diff --git a/src/backend/executor/nodeBitmapHeapscan.c b/src/backend/executor/nodeBitmapHeapscan.c
index 83d6478bc2b..f2bb487bf10 100644
--- a/src/backend/executor/nodeBitmapHeapscan.c
+++ b/src/backend/executor/nodeBitmapHeapscan.c
@@ -79,7 +79,6 @@ typedef enum
 /* ----------------
  *	 ParallelBitmapHeapState information
  *		tbmiterator				iterator for scanning current pages
- *		mutex					mutual exclusion for state
  *		state					current state of the TIDBitmap
  *		cv						conditional wait variable
  * ----------------
@@ -87,8 +86,7 @@ typedef enum
 typedef struct ParallelBitmapHeapState
 {
 	dsa_pointer tbmiterator;
-	slock_t		mutex;
-	SharedBitmapState state;
+	pg_atomic_uint32 state;
 	ConditionVariable cv;
 } ParallelBitmapHeapState;
 
@@ -228,9 +226,7 @@ BitmapHeapNext(BitmapHeapScanState *node)
 static inline void
 BitmapDoneInitializingSharedState(ParallelBitmapHeapState *pstate)
 {
-	SpinLockAcquire(&pstate->mutex);
-	pstate->state = BM_FINISHED;
-	SpinLockRelease(&pstate->mutex);
+	pg_atomic_write_membarrier_u32(&pstate->state, BM_FINISHED);
 	ConditionVariableBroadcast(&pstate->cv);
 }
 
@@ -480,11 +476,8 @@ BitmapShouldInitializeSharedState(ParallelBitmapHeapState *pstate)
 
 	while (1)
 	{
-		SpinLockAcquire(&pstate->mutex);
-		state = pstate->state;
-		if (pstate->state == BM_INITIAL)
-			pstate->state = BM_INPROGRESS;
-		SpinLockRelease(&pstate->mutex);
+		state = BM_INITIAL;
+		pg_atomic_compare_exchange_u32(&pstate->state, &state, BM_INPROGRESS);
 
 		/* Exit if bitmap is done, or if we're the leader. */
 		if (state != BM_INPROGRESS)
@@ -538,9 +531,7 @@ ExecBitmapHeapInitializeDSM(BitmapHeapScanState *node,
 
 	pstate->tbmiterator = 0;
 
-	/* Initialize the mutex */
-	SpinLockInit(&pstate->mutex);
-	pstate->state = BM_INITIAL;
+	pg_atomic_init_u32(&pstate->state, BM_INITIAL);
 
 	ConditionVariableInit(&pstate->cv);
 
@@ -565,7 +556,7 @@ ExecBitmapHeapReInitializeDSM(BitmapHeapScanState *node,
 	if (dsa == NULL)
 		return;
 
-	pstate->state = BM_INITIAL;
+	pg_atomic_write_u32(&pstate->state, BM_INITIAL);
 
 	if (DsaPointerIsValid(pstate->tbmiterator))
 		tbm_free_shared_area(dsa, pstate->tbmiterator);
-- 
2.50.1 (Apple Git-155)


--Ot5x3ffkWEuxilWO
Content-Type: text/plain; charset=us-ascii
Content-Disposition: attachment;
	filename=v1-0003-convert-FixedParallelState-last_xlog_end-to-an-at.patch



^ permalink  raw  reply  [nested|flat] 440+ messages in thread

* [PATCH v1 2/8] convert ParallelBitmapHeapState->state to an atomic
@ 2026-07-09 18:38 Nathan Bossart <nathan@postgresql.org>
  0 siblings, 0 replies; 440+ messages in thread

From: Nathan Bossart @ 2026-07-09 18:38 UTC (permalink / raw)

---
 src/backend/executor/nodeBitmapHeapscan.c | 21 ++++++---------------
 1 file changed, 6 insertions(+), 15 deletions(-)

diff --git a/src/backend/executor/nodeBitmapHeapscan.c b/src/backend/executor/nodeBitmapHeapscan.c
index 83d6478bc2b..f2bb487bf10 100644
--- a/src/backend/executor/nodeBitmapHeapscan.c
+++ b/src/backend/executor/nodeBitmapHeapscan.c
@@ -79,7 +79,6 @@ typedef enum
 /* ----------------
  *	 ParallelBitmapHeapState information
  *		tbmiterator				iterator for scanning current pages
- *		mutex					mutual exclusion for state
  *		state					current state of the TIDBitmap
  *		cv						conditional wait variable
  * ----------------
@@ -87,8 +86,7 @@ typedef enum
 typedef struct ParallelBitmapHeapState
 {
 	dsa_pointer tbmiterator;
-	slock_t		mutex;
-	SharedBitmapState state;
+	pg_atomic_uint32 state;
 	ConditionVariable cv;
 } ParallelBitmapHeapState;
 
@@ -228,9 +226,7 @@ BitmapHeapNext(BitmapHeapScanState *node)
 static inline void
 BitmapDoneInitializingSharedState(ParallelBitmapHeapState *pstate)
 {
-	SpinLockAcquire(&pstate->mutex);
-	pstate->state = BM_FINISHED;
-	SpinLockRelease(&pstate->mutex);
+	pg_atomic_write_membarrier_u32(&pstate->state, BM_FINISHED);
 	ConditionVariableBroadcast(&pstate->cv);
 }
 
@@ -480,11 +476,8 @@ BitmapShouldInitializeSharedState(ParallelBitmapHeapState *pstate)
 
 	while (1)
 	{
-		SpinLockAcquire(&pstate->mutex);
-		state = pstate->state;
-		if (pstate->state == BM_INITIAL)
-			pstate->state = BM_INPROGRESS;
-		SpinLockRelease(&pstate->mutex);
+		state = BM_INITIAL;
+		pg_atomic_compare_exchange_u32(&pstate->state, &state, BM_INPROGRESS);
 
 		/* Exit if bitmap is done, or if we're the leader. */
 		if (state != BM_INPROGRESS)
@@ -538,9 +531,7 @@ ExecBitmapHeapInitializeDSM(BitmapHeapScanState *node,
 
 	pstate->tbmiterator = 0;
 
-	/* Initialize the mutex */
-	SpinLockInit(&pstate->mutex);
-	pstate->state = BM_INITIAL;
+	pg_atomic_init_u32(&pstate->state, BM_INITIAL);
 
 	ConditionVariableInit(&pstate->cv);
 
@@ -565,7 +556,7 @@ ExecBitmapHeapReInitializeDSM(BitmapHeapScanState *node,
 	if (dsa == NULL)
 		return;
 
-	pstate->state = BM_INITIAL;
+	pg_atomic_write_u32(&pstate->state, BM_INITIAL);
 
 	if (DsaPointerIsValid(pstate->tbmiterator))
 		tbm_free_shared_area(dsa, pstate->tbmiterator);
-- 
2.50.1 (Apple Git-155)


--Ot5x3ffkWEuxilWO
Content-Type: text/plain; charset=us-ascii
Content-Disposition: attachment;
	filename=v1-0003-convert-FixedParallelState-last_xlog_end-to-an-at.patch



^ permalink  raw  reply  [nested|flat] 440+ messages in thread

* [PATCH v1 2/8] convert ParallelBitmapHeapState->state to an atomic
@ 2026-07-09 18:38 Nathan Bossart <nathan@postgresql.org>
  0 siblings, 0 replies; 440+ messages in thread

From: Nathan Bossart @ 2026-07-09 18:38 UTC (permalink / raw)

---
 src/backend/executor/nodeBitmapHeapscan.c | 21 ++++++---------------
 1 file changed, 6 insertions(+), 15 deletions(-)

diff --git a/src/backend/executor/nodeBitmapHeapscan.c b/src/backend/executor/nodeBitmapHeapscan.c
index 83d6478bc2b..f2bb487bf10 100644
--- a/src/backend/executor/nodeBitmapHeapscan.c
+++ b/src/backend/executor/nodeBitmapHeapscan.c
@@ -79,7 +79,6 @@ typedef enum
 /* ----------------
  *	 ParallelBitmapHeapState information
  *		tbmiterator				iterator for scanning current pages
- *		mutex					mutual exclusion for state
  *		state					current state of the TIDBitmap
  *		cv						conditional wait variable
  * ----------------
@@ -87,8 +86,7 @@ typedef enum
 typedef struct ParallelBitmapHeapState
 {
 	dsa_pointer tbmiterator;
-	slock_t		mutex;
-	SharedBitmapState state;
+	pg_atomic_uint32 state;
 	ConditionVariable cv;
 } ParallelBitmapHeapState;
 
@@ -228,9 +226,7 @@ BitmapHeapNext(BitmapHeapScanState *node)
 static inline void
 BitmapDoneInitializingSharedState(ParallelBitmapHeapState *pstate)
 {
-	SpinLockAcquire(&pstate->mutex);
-	pstate->state = BM_FINISHED;
-	SpinLockRelease(&pstate->mutex);
+	pg_atomic_write_membarrier_u32(&pstate->state, BM_FINISHED);
 	ConditionVariableBroadcast(&pstate->cv);
 }
 
@@ -480,11 +476,8 @@ BitmapShouldInitializeSharedState(ParallelBitmapHeapState *pstate)
 
 	while (1)
 	{
-		SpinLockAcquire(&pstate->mutex);
-		state = pstate->state;
-		if (pstate->state == BM_INITIAL)
-			pstate->state = BM_INPROGRESS;
-		SpinLockRelease(&pstate->mutex);
+		state = BM_INITIAL;
+		pg_atomic_compare_exchange_u32(&pstate->state, &state, BM_INPROGRESS);
 
 		/* Exit if bitmap is done, or if we're the leader. */
 		if (state != BM_INPROGRESS)
@@ -538,9 +531,7 @@ ExecBitmapHeapInitializeDSM(BitmapHeapScanState *node,
 
 	pstate->tbmiterator = 0;
 
-	/* Initialize the mutex */
-	SpinLockInit(&pstate->mutex);
-	pstate->state = BM_INITIAL;
+	pg_atomic_init_u32(&pstate->state, BM_INITIAL);
 
 	ConditionVariableInit(&pstate->cv);
 
@@ -565,7 +556,7 @@ ExecBitmapHeapReInitializeDSM(BitmapHeapScanState *node,
 	if (dsa == NULL)
 		return;
 
-	pstate->state = BM_INITIAL;
+	pg_atomic_write_u32(&pstate->state, BM_INITIAL);
 
 	if (DsaPointerIsValid(pstate->tbmiterator))
 		tbm_free_shared_area(dsa, pstate->tbmiterator);
-- 
2.50.1 (Apple Git-155)


--Ot5x3ffkWEuxilWO
Content-Type: text/plain; charset=us-ascii
Content-Disposition: attachment;
	filename=v1-0003-convert-FixedParallelState-last_xlog_end-to-an-at.patch



^ permalink  raw  reply  [nested|flat] 440+ messages in thread

* [PATCH v2 2/9] convert ParallelBitmapHeapState->state to an atomic
@ 2026-07-09 18:38 Nathan Bossart <nathan@postgresql.org>
  0 siblings, 0 replies; 440+ messages in thread

From: Nathan Bossart @ 2026-07-09 18:38 UTC (permalink / raw)

---
 src/backend/executor/nodeBitmapHeapscan.c | 23 +++++++----------------
 1 file changed, 7 insertions(+), 16 deletions(-)

diff --git a/src/backend/executor/nodeBitmapHeapscan.c b/src/backend/executor/nodeBitmapHeapscan.c
index 83d6478bc2b..a9e83f30687 100644
--- a/src/backend/executor/nodeBitmapHeapscan.c
+++ b/src/backend/executor/nodeBitmapHeapscan.c
@@ -79,7 +79,6 @@ typedef enum
 /* ----------------
  *	 ParallelBitmapHeapState information
  *		tbmiterator				iterator for scanning current pages
- *		mutex					mutual exclusion for state
  *		state					current state of the TIDBitmap
  *		cv						conditional wait variable
  * ----------------
@@ -87,8 +86,7 @@ typedef enum
 typedef struct ParallelBitmapHeapState
 {
 	dsa_pointer tbmiterator;
-	slock_t		mutex;
-	SharedBitmapState state;
+	pg_atomic_uint32 state;
 	ConditionVariable cv;
 } ParallelBitmapHeapState;
 
@@ -228,9 +226,7 @@ BitmapHeapNext(BitmapHeapScanState *node)
 static inline void
 BitmapDoneInitializingSharedState(ParallelBitmapHeapState *pstate)
 {
-	SpinLockAcquire(&pstate->mutex);
-	pstate->state = BM_FINISHED;
-	SpinLockRelease(&pstate->mutex);
+	pg_atomic_write_membarrier_u32(&pstate->state, BM_FINISHED);
 	ConditionVariableBroadcast(&pstate->cv);
 }
 
@@ -476,15 +472,12 @@ ExecInitBitmapHeapScan(BitmapHeapScan *node, EState *estate, int eflags)
 static bool
 BitmapShouldInitializeSharedState(ParallelBitmapHeapState *pstate)
 {
-	SharedBitmapState state;
+	uint32		state;
 
 	while (1)
 	{
-		SpinLockAcquire(&pstate->mutex);
-		state = pstate->state;
-		if (pstate->state == BM_INITIAL)
-			pstate->state = BM_INPROGRESS;
-		SpinLockRelease(&pstate->mutex);
+		state = BM_INITIAL;
+		pg_atomic_compare_exchange_u32(&pstate->state, &state, BM_INPROGRESS);
 
 		/* Exit if bitmap is done, or if we're the leader. */
 		if (state != BM_INPROGRESS)
@@ -538,9 +531,7 @@ ExecBitmapHeapInitializeDSM(BitmapHeapScanState *node,
 
 	pstate->tbmiterator = 0;
 
-	/* Initialize the mutex */
-	SpinLockInit(&pstate->mutex);
-	pstate->state = BM_INITIAL;
+	pg_atomic_init_u32(&pstate->state, BM_INITIAL);
 
 	ConditionVariableInit(&pstate->cv);
 
@@ -565,7 +556,7 @@ ExecBitmapHeapReInitializeDSM(BitmapHeapScanState *node,
 	if (dsa == NULL)
 		return;
 
-	pstate->state = BM_INITIAL;
+	pg_atomic_write_u32(&pstate->state, BM_INITIAL);
 
 	if (DsaPointerIsValid(pstate->tbmiterator))
 		tbm_free_shared_area(dsa, pstate->tbmiterator);
-- 
2.50.1 (Apple Git-155)


--Xf36GNcW+0xZNily
Content-Type: text/plain; charset=us-ascii
Content-Disposition: attachment;
	filename=v2-0003-convert-FixedParallelState-last_xlog_end-to-an-at.patch



^ permalink  raw  reply  [nested|flat] 440+ messages in thread

* [PATCH v2 2/9] convert ParallelBitmapHeapState->state to an atomic
@ 2026-07-09 18:38 Nathan Bossart <nathan@postgresql.org>
  0 siblings, 0 replies; 440+ messages in thread

From: Nathan Bossart @ 2026-07-09 18:38 UTC (permalink / raw)

---
 src/backend/executor/nodeBitmapHeapscan.c | 23 +++++++----------------
 1 file changed, 7 insertions(+), 16 deletions(-)

diff --git a/src/backend/executor/nodeBitmapHeapscan.c b/src/backend/executor/nodeBitmapHeapscan.c
index 83d6478bc2b..a9e83f30687 100644
--- a/src/backend/executor/nodeBitmapHeapscan.c
+++ b/src/backend/executor/nodeBitmapHeapscan.c
@@ -79,7 +79,6 @@ typedef enum
 /* ----------------
  *	 ParallelBitmapHeapState information
  *		tbmiterator				iterator for scanning current pages
- *		mutex					mutual exclusion for state
  *		state					current state of the TIDBitmap
  *		cv						conditional wait variable
  * ----------------
@@ -87,8 +86,7 @@ typedef enum
 typedef struct ParallelBitmapHeapState
 {
 	dsa_pointer tbmiterator;
-	slock_t		mutex;
-	SharedBitmapState state;
+	pg_atomic_uint32 state;
 	ConditionVariable cv;
 } ParallelBitmapHeapState;
 
@@ -228,9 +226,7 @@ BitmapHeapNext(BitmapHeapScanState *node)
 static inline void
 BitmapDoneInitializingSharedState(ParallelBitmapHeapState *pstate)
 {
-	SpinLockAcquire(&pstate->mutex);
-	pstate->state = BM_FINISHED;
-	SpinLockRelease(&pstate->mutex);
+	pg_atomic_write_membarrier_u32(&pstate->state, BM_FINISHED);
 	ConditionVariableBroadcast(&pstate->cv);
 }
 
@@ -476,15 +472,12 @@ ExecInitBitmapHeapScan(BitmapHeapScan *node, EState *estate, int eflags)
 static bool
 BitmapShouldInitializeSharedState(ParallelBitmapHeapState *pstate)
 {
-	SharedBitmapState state;
+	uint32		state;
 
 	while (1)
 	{
-		SpinLockAcquire(&pstate->mutex);
-		state = pstate->state;
-		if (pstate->state == BM_INITIAL)
-			pstate->state = BM_INPROGRESS;
-		SpinLockRelease(&pstate->mutex);
+		state = BM_INITIAL;
+		pg_atomic_compare_exchange_u32(&pstate->state, &state, BM_INPROGRESS);
 
 		/* Exit if bitmap is done, or if we're the leader. */
 		if (state != BM_INPROGRESS)
@@ -538,9 +531,7 @@ ExecBitmapHeapInitializeDSM(BitmapHeapScanState *node,
 
 	pstate->tbmiterator = 0;
 
-	/* Initialize the mutex */
-	SpinLockInit(&pstate->mutex);
-	pstate->state = BM_INITIAL;
+	pg_atomic_init_u32(&pstate->state, BM_INITIAL);
 
 	ConditionVariableInit(&pstate->cv);
 
@@ -565,7 +556,7 @@ ExecBitmapHeapReInitializeDSM(BitmapHeapScanState *node,
 	if (dsa == NULL)
 		return;
 
-	pstate->state = BM_INITIAL;
+	pg_atomic_write_u32(&pstate->state, BM_INITIAL);
 
 	if (DsaPointerIsValid(pstate->tbmiterator))
 		tbm_free_shared_area(dsa, pstate->tbmiterator);
-- 
2.50.1 (Apple Git-155)


--Xf36GNcW+0xZNily
Content-Type: text/plain; charset=us-ascii
Content-Disposition: attachment;
	filename=v2-0003-convert-FixedParallelState-last_xlog_end-to-an-at.patch



^ permalink  raw  reply  [nested|flat] 440+ messages in thread

* [PATCH v1 2/8] convert ParallelBitmapHeapState->state to an atomic
@ 2026-07-09 18:38 Nathan Bossart <nathan@postgresql.org>
  0 siblings, 0 replies; 440+ messages in thread

From: Nathan Bossart @ 2026-07-09 18:38 UTC (permalink / raw)

---
 src/backend/executor/nodeBitmapHeapscan.c | 21 ++++++---------------
 1 file changed, 6 insertions(+), 15 deletions(-)

diff --git a/src/backend/executor/nodeBitmapHeapscan.c b/src/backend/executor/nodeBitmapHeapscan.c
index 83d6478bc2b..f2bb487bf10 100644
--- a/src/backend/executor/nodeBitmapHeapscan.c
+++ b/src/backend/executor/nodeBitmapHeapscan.c
@@ -79,7 +79,6 @@ typedef enum
 /* ----------------
  *	 ParallelBitmapHeapState information
  *		tbmiterator				iterator for scanning current pages
- *		mutex					mutual exclusion for state
  *		state					current state of the TIDBitmap
  *		cv						conditional wait variable
  * ----------------
@@ -87,8 +86,7 @@ typedef enum
 typedef struct ParallelBitmapHeapState
 {
 	dsa_pointer tbmiterator;
-	slock_t		mutex;
-	SharedBitmapState state;
+	pg_atomic_uint32 state;
 	ConditionVariable cv;
 } ParallelBitmapHeapState;
 
@@ -228,9 +226,7 @@ BitmapHeapNext(BitmapHeapScanState *node)
 static inline void
 BitmapDoneInitializingSharedState(ParallelBitmapHeapState *pstate)
 {
-	SpinLockAcquire(&pstate->mutex);
-	pstate->state = BM_FINISHED;
-	SpinLockRelease(&pstate->mutex);
+	pg_atomic_write_membarrier_u32(&pstate->state, BM_FINISHED);
 	ConditionVariableBroadcast(&pstate->cv);
 }
 
@@ -480,11 +476,8 @@ BitmapShouldInitializeSharedState(ParallelBitmapHeapState *pstate)
 
 	while (1)
 	{
-		SpinLockAcquire(&pstate->mutex);
-		state = pstate->state;
-		if (pstate->state == BM_INITIAL)
-			pstate->state = BM_INPROGRESS;
-		SpinLockRelease(&pstate->mutex);
+		state = BM_INITIAL;
+		pg_atomic_compare_exchange_u32(&pstate->state, &state, BM_INPROGRESS);
 
 		/* Exit if bitmap is done, or if we're the leader. */
 		if (state != BM_INPROGRESS)
@@ -538,9 +531,7 @@ ExecBitmapHeapInitializeDSM(BitmapHeapScanState *node,
 
 	pstate->tbmiterator = 0;
 
-	/* Initialize the mutex */
-	SpinLockInit(&pstate->mutex);
-	pstate->state = BM_INITIAL;
+	pg_atomic_init_u32(&pstate->state, BM_INITIAL);
 
 	ConditionVariableInit(&pstate->cv);
 
@@ -565,7 +556,7 @@ ExecBitmapHeapReInitializeDSM(BitmapHeapScanState *node,
 	if (dsa == NULL)
 		return;
 
-	pstate->state = BM_INITIAL;
+	pg_atomic_write_u32(&pstate->state, BM_INITIAL);
 
 	if (DsaPointerIsValid(pstate->tbmiterator))
 		tbm_free_shared_area(dsa, pstate->tbmiterator);
-- 
2.50.1 (Apple Git-155)


--Ot5x3ffkWEuxilWO
Content-Type: text/plain; charset=us-ascii
Content-Disposition: attachment;
	filename=v1-0003-convert-FixedParallelState-last_xlog_end-to-an-at.patch



^ permalink  raw  reply  [nested|flat] 440+ messages in thread

* [PATCH v1 2/8] convert ParallelBitmapHeapState->state to an atomic
@ 2026-07-09 18:38 Nathan Bossart <nathan@postgresql.org>
  0 siblings, 0 replies; 440+ messages in thread

From: Nathan Bossart @ 2026-07-09 18:38 UTC (permalink / raw)

---
 src/backend/executor/nodeBitmapHeapscan.c | 21 ++++++---------------
 1 file changed, 6 insertions(+), 15 deletions(-)

diff --git a/src/backend/executor/nodeBitmapHeapscan.c b/src/backend/executor/nodeBitmapHeapscan.c
index 83d6478bc2b..f2bb487bf10 100644
--- a/src/backend/executor/nodeBitmapHeapscan.c
+++ b/src/backend/executor/nodeBitmapHeapscan.c
@@ -79,7 +79,6 @@ typedef enum
 /* ----------------
  *	 ParallelBitmapHeapState information
  *		tbmiterator				iterator for scanning current pages
- *		mutex					mutual exclusion for state
  *		state					current state of the TIDBitmap
  *		cv						conditional wait variable
  * ----------------
@@ -87,8 +86,7 @@ typedef enum
 typedef struct ParallelBitmapHeapState
 {
 	dsa_pointer tbmiterator;
-	slock_t		mutex;
-	SharedBitmapState state;
+	pg_atomic_uint32 state;
 	ConditionVariable cv;
 } ParallelBitmapHeapState;
 
@@ -228,9 +226,7 @@ BitmapHeapNext(BitmapHeapScanState *node)
 static inline void
 BitmapDoneInitializingSharedState(ParallelBitmapHeapState *pstate)
 {
-	SpinLockAcquire(&pstate->mutex);
-	pstate->state = BM_FINISHED;
-	SpinLockRelease(&pstate->mutex);
+	pg_atomic_write_membarrier_u32(&pstate->state, BM_FINISHED);
 	ConditionVariableBroadcast(&pstate->cv);
 }
 
@@ -480,11 +476,8 @@ BitmapShouldInitializeSharedState(ParallelBitmapHeapState *pstate)
 
 	while (1)
 	{
-		SpinLockAcquire(&pstate->mutex);
-		state = pstate->state;
-		if (pstate->state == BM_INITIAL)
-			pstate->state = BM_INPROGRESS;
-		SpinLockRelease(&pstate->mutex);
+		state = BM_INITIAL;
+		pg_atomic_compare_exchange_u32(&pstate->state, &state, BM_INPROGRESS);
 
 		/* Exit if bitmap is done, or if we're the leader. */
 		if (state != BM_INPROGRESS)
@@ -538,9 +531,7 @@ ExecBitmapHeapInitializeDSM(BitmapHeapScanState *node,
 
 	pstate->tbmiterator = 0;
 
-	/* Initialize the mutex */
-	SpinLockInit(&pstate->mutex);
-	pstate->state = BM_INITIAL;
+	pg_atomic_init_u32(&pstate->state, BM_INITIAL);
 
 	ConditionVariableInit(&pstate->cv);
 
@@ -565,7 +556,7 @@ ExecBitmapHeapReInitializeDSM(BitmapHeapScanState *node,
 	if (dsa == NULL)
 		return;
 
-	pstate->state = BM_INITIAL;
+	pg_atomic_write_u32(&pstate->state, BM_INITIAL);
 
 	if (DsaPointerIsValid(pstate->tbmiterator))
 		tbm_free_shared_area(dsa, pstate->tbmiterator);
-- 
2.50.1 (Apple Git-155)


--Ot5x3ffkWEuxilWO
Content-Type: text/plain; charset=us-ascii
Content-Disposition: attachment;
	filename=v1-0003-convert-FixedParallelState-last_xlog_end-to-an-at.patch



^ permalink  raw  reply  [nested|flat] 440+ messages in thread

* [PATCH v2 2/9] convert ParallelBitmapHeapState->state to an atomic
@ 2026-07-09 18:38 Nathan Bossart <nathan@postgresql.org>
  0 siblings, 0 replies; 440+ messages in thread

From: Nathan Bossart @ 2026-07-09 18:38 UTC (permalink / raw)

---
 src/backend/executor/nodeBitmapHeapscan.c | 23 +++++++----------------
 1 file changed, 7 insertions(+), 16 deletions(-)

diff --git a/src/backend/executor/nodeBitmapHeapscan.c b/src/backend/executor/nodeBitmapHeapscan.c
index 83d6478bc2b..a9e83f30687 100644
--- a/src/backend/executor/nodeBitmapHeapscan.c
+++ b/src/backend/executor/nodeBitmapHeapscan.c
@@ -79,7 +79,6 @@ typedef enum
 /* ----------------
  *	 ParallelBitmapHeapState information
  *		tbmiterator				iterator for scanning current pages
- *		mutex					mutual exclusion for state
  *		state					current state of the TIDBitmap
  *		cv						conditional wait variable
  * ----------------
@@ -87,8 +86,7 @@ typedef enum
 typedef struct ParallelBitmapHeapState
 {
 	dsa_pointer tbmiterator;
-	slock_t		mutex;
-	SharedBitmapState state;
+	pg_atomic_uint32 state;
 	ConditionVariable cv;
 } ParallelBitmapHeapState;
 
@@ -228,9 +226,7 @@ BitmapHeapNext(BitmapHeapScanState *node)
 static inline void
 BitmapDoneInitializingSharedState(ParallelBitmapHeapState *pstate)
 {
-	SpinLockAcquire(&pstate->mutex);
-	pstate->state = BM_FINISHED;
-	SpinLockRelease(&pstate->mutex);
+	pg_atomic_write_membarrier_u32(&pstate->state, BM_FINISHED);
 	ConditionVariableBroadcast(&pstate->cv);
 }
 
@@ -476,15 +472,12 @@ ExecInitBitmapHeapScan(BitmapHeapScan *node, EState *estate, int eflags)
 static bool
 BitmapShouldInitializeSharedState(ParallelBitmapHeapState *pstate)
 {
-	SharedBitmapState state;
+	uint32		state;
 
 	while (1)
 	{
-		SpinLockAcquire(&pstate->mutex);
-		state = pstate->state;
-		if (pstate->state == BM_INITIAL)
-			pstate->state = BM_INPROGRESS;
-		SpinLockRelease(&pstate->mutex);
+		state = BM_INITIAL;
+		pg_atomic_compare_exchange_u32(&pstate->state, &state, BM_INPROGRESS);
 
 		/* Exit if bitmap is done, or if we're the leader. */
 		if (state != BM_INPROGRESS)
@@ -538,9 +531,7 @@ ExecBitmapHeapInitializeDSM(BitmapHeapScanState *node,
 
 	pstate->tbmiterator = 0;
 
-	/* Initialize the mutex */
-	SpinLockInit(&pstate->mutex);
-	pstate->state = BM_INITIAL;
+	pg_atomic_init_u32(&pstate->state, BM_INITIAL);
 
 	ConditionVariableInit(&pstate->cv);
 
@@ -565,7 +556,7 @@ ExecBitmapHeapReInitializeDSM(BitmapHeapScanState *node,
 	if (dsa == NULL)
 		return;
 
-	pstate->state = BM_INITIAL;
+	pg_atomic_write_u32(&pstate->state, BM_INITIAL);
 
 	if (DsaPointerIsValid(pstate->tbmiterator))
 		tbm_free_shared_area(dsa, pstate->tbmiterator);
-- 
2.50.1 (Apple Git-155)


--Xf36GNcW+0xZNily
Content-Type: text/plain; charset=us-ascii
Content-Disposition: attachment;
	filename=v2-0003-convert-FixedParallelState-last_xlog_end-to-an-at.patch



^ permalink  raw  reply  [nested|flat] 440+ messages in thread

* [PATCH v2 2/9] convert ParallelBitmapHeapState->state to an atomic
@ 2026-07-09 18:38 Nathan Bossart <nathan@postgresql.org>
  0 siblings, 0 replies; 440+ messages in thread

From: Nathan Bossart @ 2026-07-09 18:38 UTC (permalink / raw)

---
 src/backend/executor/nodeBitmapHeapscan.c | 23 +++++++----------------
 1 file changed, 7 insertions(+), 16 deletions(-)

diff --git a/src/backend/executor/nodeBitmapHeapscan.c b/src/backend/executor/nodeBitmapHeapscan.c
index 83d6478bc2b..a9e83f30687 100644
--- a/src/backend/executor/nodeBitmapHeapscan.c
+++ b/src/backend/executor/nodeBitmapHeapscan.c
@@ -79,7 +79,6 @@ typedef enum
 /* ----------------
  *	 ParallelBitmapHeapState information
  *		tbmiterator				iterator for scanning current pages
- *		mutex					mutual exclusion for state
  *		state					current state of the TIDBitmap
  *		cv						conditional wait variable
  * ----------------
@@ -87,8 +86,7 @@ typedef enum
 typedef struct ParallelBitmapHeapState
 {
 	dsa_pointer tbmiterator;
-	slock_t		mutex;
-	SharedBitmapState state;
+	pg_atomic_uint32 state;
 	ConditionVariable cv;
 } ParallelBitmapHeapState;
 
@@ -228,9 +226,7 @@ BitmapHeapNext(BitmapHeapScanState *node)
 static inline void
 BitmapDoneInitializingSharedState(ParallelBitmapHeapState *pstate)
 {
-	SpinLockAcquire(&pstate->mutex);
-	pstate->state = BM_FINISHED;
-	SpinLockRelease(&pstate->mutex);
+	pg_atomic_write_membarrier_u32(&pstate->state, BM_FINISHED);
 	ConditionVariableBroadcast(&pstate->cv);
 }
 
@@ -476,15 +472,12 @@ ExecInitBitmapHeapScan(BitmapHeapScan *node, EState *estate, int eflags)
 static bool
 BitmapShouldInitializeSharedState(ParallelBitmapHeapState *pstate)
 {
-	SharedBitmapState state;
+	uint32		state;
 
 	while (1)
 	{
-		SpinLockAcquire(&pstate->mutex);
-		state = pstate->state;
-		if (pstate->state == BM_INITIAL)
-			pstate->state = BM_INPROGRESS;
-		SpinLockRelease(&pstate->mutex);
+		state = BM_INITIAL;
+		pg_atomic_compare_exchange_u32(&pstate->state, &state, BM_INPROGRESS);
 
 		/* Exit if bitmap is done, or if we're the leader. */
 		if (state != BM_INPROGRESS)
@@ -538,9 +531,7 @@ ExecBitmapHeapInitializeDSM(BitmapHeapScanState *node,
 
 	pstate->tbmiterator = 0;
 
-	/* Initialize the mutex */
-	SpinLockInit(&pstate->mutex);
-	pstate->state = BM_INITIAL;
+	pg_atomic_init_u32(&pstate->state, BM_INITIAL);
 
 	ConditionVariableInit(&pstate->cv);
 
@@ -565,7 +556,7 @@ ExecBitmapHeapReInitializeDSM(BitmapHeapScanState *node,
 	if (dsa == NULL)
 		return;
 
-	pstate->state = BM_INITIAL;
+	pg_atomic_write_u32(&pstate->state, BM_INITIAL);
 
 	if (DsaPointerIsValid(pstate->tbmiterator))
 		tbm_free_shared_area(dsa, pstate->tbmiterator);
-- 
2.50.1 (Apple Git-155)


--Xf36GNcW+0xZNily
Content-Type: text/plain; charset=us-ascii
Content-Disposition: attachment;
	filename=v2-0003-convert-FixedParallelState-last_xlog_end-to-an-at.patch



^ permalink  raw  reply  [nested|flat] 440+ messages in thread

* [PATCH v1 2/8] convert ParallelBitmapHeapState->state to an atomic
@ 2026-07-09 18:38 Nathan Bossart <nathan@postgresql.org>
  0 siblings, 0 replies; 440+ messages in thread

From: Nathan Bossart @ 2026-07-09 18:38 UTC (permalink / raw)

---
 src/backend/executor/nodeBitmapHeapscan.c | 21 ++++++---------------
 1 file changed, 6 insertions(+), 15 deletions(-)

diff --git a/src/backend/executor/nodeBitmapHeapscan.c b/src/backend/executor/nodeBitmapHeapscan.c
index 83d6478bc2b..f2bb487bf10 100644
--- a/src/backend/executor/nodeBitmapHeapscan.c
+++ b/src/backend/executor/nodeBitmapHeapscan.c
@@ -79,7 +79,6 @@ typedef enum
 /* ----------------
  *	 ParallelBitmapHeapState information
  *		tbmiterator				iterator for scanning current pages
- *		mutex					mutual exclusion for state
  *		state					current state of the TIDBitmap
  *		cv						conditional wait variable
  * ----------------
@@ -87,8 +86,7 @@ typedef enum
 typedef struct ParallelBitmapHeapState
 {
 	dsa_pointer tbmiterator;
-	slock_t		mutex;
-	SharedBitmapState state;
+	pg_atomic_uint32 state;
 	ConditionVariable cv;
 } ParallelBitmapHeapState;
 
@@ -228,9 +226,7 @@ BitmapHeapNext(BitmapHeapScanState *node)
 static inline void
 BitmapDoneInitializingSharedState(ParallelBitmapHeapState *pstate)
 {
-	SpinLockAcquire(&pstate->mutex);
-	pstate->state = BM_FINISHED;
-	SpinLockRelease(&pstate->mutex);
+	pg_atomic_write_membarrier_u32(&pstate->state, BM_FINISHED);
 	ConditionVariableBroadcast(&pstate->cv);
 }
 
@@ -480,11 +476,8 @@ BitmapShouldInitializeSharedState(ParallelBitmapHeapState *pstate)
 
 	while (1)
 	{
-		SpinLockAcquire(&pstate->mutex);
-		state = pstate->state;
-		if (pstate->state == BM_INITIAL)
-			pstate->state = BM_INPROGRESS;
-		SpinLockRelease(&pstate->mutex);
+		state = BM_INITIAL;
+		pg_atomic_compare_exchange_u32(&pstate->state, &state, BM_INPROGRESS);
 
 		/* Exit if bitmap is done, or if we're the leader. */
 		if (state != BM_INPROGRESS)
@@ -538,9 +531,7 @@ ExecBitmapHeapInitializeDSM(BitmapHeapScanState *node,
 
 	pstate->tbmiterator = 0;
 
-	/* Initialize the mutex */
-	SpinLockInit(&pstate->mutex);
-	pstate->state = BM_INITIAL;
+	pg_atomic_init_u32(&pstate->state, BM_INITIAL);
 
 	ConditionVariableInit(&pstate->cv);
 
@@ -565,7 +556,7 @@ ExecBitmapHeapReInitializeDSM(BitmapHeapScanState *node,
 	if (dsa == NULL)
 		return;
 
-	pstate->state = BM_INITIAL;
+	pg_atomic_write_u32(&pstate->state, BM_INITIAL);
 
 	if (DsaPointerIsValid(pstate->tbmiterator))
 		tbm_free_shared_area(dsa, pstate->tbmiterator);
-- 
2.50.1 (Apple Git-155)


--Ot5x3ffkWEuxilWO
Content-Type: text/plain; charset=us-ascii
Content-Disposition: attachment;
	filename=v1-0003-convert-FixedParallelState-last_xlog_end-to-an-at.patch



^ permalink  raw  reply  [nested|flat] 440+ messages in thread

* [PATCH v1 2/8] convert ParallelBitmapHeapState->state to an atomic
@ 2026-07-09 18:38 Nathan Bossart <nathan@postgresql.org>
  0 siblings, 0 replies; 440+ messages in thread

From: Nathan Bossart @ 2026-07-09 18:38 UTC (permalink / raw)

---
 src/backend/executor/nodeBitmapHeapscan.c | 21 ++++++---------------
 1 file changed, 6 insertions(+), 15 deletions(-)

diff --git a/src/backend/executor/nodeBitmapHeapscan.c b/src/backend/executor/nodeBitmapHeapscan.c
index 83d6478bc2b..f2bb487bf10 100644
--- a/src/backend/executor/nodeBitmapHeapscan.c
+++ b/src/backend/executor/nodeBitmapHeapscan.c
@@ -79,7 +79,6 @@ typedef enum
 /* ----------------
  *	 ParallelBitmapHeapState information
  *		tbmiterator				iterator for scanning current pages
- *		mutex					mutual exclusion for state
  *		state					current state of the TIDBitmap
  *		cv						conditional wait variable
  * ----------------
@@ -87,8 +86,7 @@ typedef enum
 typedef struct ParallelBitmapHeapState
 {
 	dsa_pointer tbmiterator;
-	slock_t		mutex;
-	SharedBitmapState state;
+	pg_atomic_uint32 state;
 	ConditionVariable cv;
 } ParallelBitmapHeapState;
 
@@ -228,9 +226,7 @@ BitmapHeapNext(BitmapHeapScanState *node)
 static inline void
 BitmapDoneInitializingSharedState(ParallelBitmapHeapState *pstate)
 {
-	SpinLockAcquire(&pstate->mutex);
-	pstate->state = BM_FINISHED;
-	SpinLockRelease(&pstate->mutex);
+	pg_atomic_write_membarrier_u32(&pstate->state, BM_FINISHED);
 	ConditionVariableBroadcast(&pstate->cv);
 }
 
@@ -480,11 +476,8 @@ BitmapShouldInitializeSharedState(ParallelBitmapHeapState *pstate)
 
 	while (1)
 	{
-		SpinLockAcquire(&pstate->mutex);
-		state = pstate->state;
-		if (pstate->state == BM_INITIAL)
-			pstate->state = BM_INPROGRESS;
-		SpinLockRelease(&pstate->mutex);
+		state = BM_INITIAL;
+		pg_atomic_compare_exchange_u32(&pstate->state, &state, BM_INPROGRESS);
 
 		/* Exit if bitmap is done, or if we're the leader. */
 		if (state != BM_INPROGRESS)
@@ -538,9 +531,7 @@ ExecBitmapHeapInitializeDSM(BitmapHeapScanState *node,
 
 	pstate->tbmiterator = 0;
 
-	/* Initialize the mutex */
-	SpinLockInit(&pstate->mutex);
-	pstate->state = BM_INITIAL;
+	pg_atomic_init_u32(&pstate->state, BM_INITIAL);
 
 	ConditionVariableInit(&pstate->cv);
 
@@ -565,7 +556,7 @@ ExecBitmapHeapReInitializeDSM(BitmapHeapScanState *node,
 	if (dsa == NULL)
 		return;
 
-	pstate->state = BM_INITIAL;
+	pg_atomic_write_u32(&pstate->state, BM_INITIAL);
 
 	if (DsaPointerIsValid(pstate->tbmiterator))
 		tbm_free_shared_area(dsa, pstate->tbmiterator);
-- 
2.50.1 (Apple Git-155)


--Ot5x3ffkWEuxilWO
Content-Type: text/plain; charset=us-ascii
Content-Disposition: attachment;
	filename=v1-0003-convert-FixedParallelState-last_xlog_end-to-an-at.patch



^ permalink  raw  reply  [nested|flat] 440+ messages in thread

* [PATCH v2 2/9] convert ParallelBitmapHeapState->state to an atomic
@ 2026-07-09 18:38 Nathan Bossart <nathan@postgresql.org>
  0 siblings, 0 replies; 440+ messages in thread

From: Nathan Bossart @ 2026-07-09 18:38 UTC (permalink / raw)

---
 src/backend/executor/nodeBitmapHeapscan.c | 23 +++++++----------------
 1 file changed, 7 insertions(+), 16 deletions(-)

diff --git a/src/backend/executor/nodeBitmapHeapscan.c b/src/backend/executor/nodeBitmapHeapscan.c
index 83d6478bc2b..a9e83f30687 100644
--- a/src/backend/executor/nodeBitmapHeapscan.c
+++ b/src/backend/executor/nodeBitmapHeapscan.c
@@ -79,7 +79,6 @@ typedef enum
 /* ----------------
  *	 ParallelBitmapHeapState information
  *		tbmiterator				iterator for scanning current pages
- *		mutex					mutual exclusion for state
  *		state					current state of the TIDBitmap
  *		cv						conditional wait variable
  * ----------------
@@ -87,8 +86,7 @@ typedef enum
 typedef struct ParallelBitmapHeapState
 {
 	dsa_pointer tbmiterator;
-	slock_t		mutex;
-	SharedBitmapState state;
+	pg_atomic_uint32 state;
 	ConditionVariable cv;
 } ParallelBitmapHeapState;
 
@@ -228,9 +226,7 @@ BitmapHeapNext(BitmapHeapScanState *node)
 static inline void
 BitmapDoneInitializingSharedState(ParallelBitmapHeapState *pstate)
 {
-	SpinLockAcquire(&pstate->mutex);
-	pstate->state = BM_FINISHED;
-	SpinLockRelease(&pstate->mutex);
+	pg_atomic_write_membarrier_u32(&pstate->state, BM_FINISHED);
 	ConditionVariableBroadcast(&pstate->cv);
 }
 
@@ -476,15 +472,12 @@ ExecInitBitmapHeapScan(BitmapHeapScan *node, EState *estate, int eflags)
 static bool
 BitmapShouldInitializeSharedState(ParallelBitmapHeapState *pstate)
 {
-	SharedBitmapState state;
+	uint32		state;
 
 	while (1)
 	{
-		SpinLockAcquire(&pstate->mutex);
-		state = pstate->state;
-		if (pstate->state == BM_INITIAL)
-			pstate->state = BM_INPROGRESS;
-		SpinLockRelease(&pstate->mutex);
+		state = BM_INITIAL;
+		pg_atomic_compare_exchange_u32(&pstate->state, &state, BM_INPROGRESS);
 
 		/* Exit if bitmap is done, or if we're the leader. */
 		if (state != BM_INPROGRESS)
@@ -538,9 +531,7 @@ ExecBitmapHeapInitializeDSM(BitmapHeapScanState *node,
 
 	pstate->tbmiterator = 0;
 
-	/* Initialize the mutex */
-	SpinLockInit(&pstate->mutex);
-	pstate->state = BM_INITIAL;
+	pg_atomic_init_u32(&pstate->state, BM_INITIAL);
 
 	ConditionVariableInit(&pstate->cv);
 
@@ -565,7 +556,7 @@ ExecBitmapHeapReInitializeDSM(BitmapHeapScanState *node,
 	if (dsa == NULL)
 		return;
 
-	pstate->state = BM_INITIAL;
+	pg_atomic_write_u32(&pstate->state, BM_INITIAL);
 
 	if (DsaPointerIsValid(pstate->tbmiterator))
 		tbm_free_shared_area(dsa, pstate->tbmiterator);
-- 
2.50.1 (Apple Git-155)


--Xf36GNcW+0xZNily
Content-Type: text/plain; charset=us-ascii
Content-Disposition: attachment;
	filename=v2-0003-convert-FixedParallelState-last_xlog_end-to-an-at.patch



^ permalink  raw  reply  [nested|flat] 440+ messages in thread

* [PATCH v1 2/8] convert ParallelBitmapHeapState->state to an atomic
@ 2026-07-09 18:38 Nathan Bossart <nathan@postgresql.org>
  0 siblings, 0 replies; 440+ messages in thread

From: Nathan Bossart @ 2026-07-09 18:38 UTC (permalink / raw)

---
 src/backend/executor/nodeBitmapHeapscan.c | 21 ++++++---------------
 1 file changed, 6 insertions(+), 15 deletions(-)

diff --git a/src/backend/executor/nodeBitmapHeapscan.c b/src/backend/executor/nodeBitmapHeapscan.c
index 83d6478bc2b..f2bb487bf10 100644
--- a/src/backend/executor/nodeBitmapHeapscan.c
+++ b/src/backend/executor/nodeBitmapHeapscan.c
@@ -79,7 +79,6 @@ typedef enum
 /* ----------------
  *	 ParallelBitmapHeapState information
  *		tbmiterator				iterator for scanning current pages
- *		mutex					mutual exclusion for state
  *		state					current state of the TIDBitmap
  *		cv						conditional wait variable
  * ----------------
@@ -87,8 +86,7 @@ typedef enum
 typedef struct ParallelBitmapHeapState
 {
 	dsa_pointer tbmiterator;
-	slock_t		mutex;
-	SharedBitmapState state;
+	pg_atomic_uint32 state;
 	ConditionVariable cv;
 } ParallelBitmapHeapState;
 
@@ -228,9 +226,7 @@ BitmapHeapNext(BitmapHeapScanState *node)
 static inline void
 BitmapDoneInitializingSharedState(ParallelBitmapHeapState *pstate)
 {
-	SpinLockAcquire(&pstate->mutex);
-	pstate->state = BM_FINISHED;
-	SpinLockRelease(&pstate->mutex);
+	pg_atomic_write_membarrier_u32(&pstate->state, BM_FINISHED);
 	ConditionVariableBroadcast(&pstate->cv);
 }
 
@@ -480,11 +476,8 @@ BitmapShouldInitializeSharedState(ParallelBitmapHeapState *pstate)
 
 	while (1)
 	{
-		SpinLockAcquire(&pstate->mutex);
-		state = pstate->state;
-		if (pstate->state == BM_INITIAL)
-			pstate->state = BM_INPROGRESS;
-		SpinLockRelease(&pstate->mutex);
+		state = BM_INITIAL;
+		pg_atomic_compare_exchange_u32(&pstate->state, &state, BM_INPROGRESS);
 
 		/* Exit if bitmap is done, or if we're the leader. */
 		if (state != BM_INPROGRESS)
@@ -538,9 +531,7 @@ ExecBitmapHeapInitializeDSM(BitmapHeapScanState *node,
 
 	pstate->tbmiterator = 0;
 
-	/* Initialize the mutex */
-	SpinLockInit(&pstate->mutex);
-	pstate->state = BM_INITIAL;
+	pg_atomic_init_u32(&pstate->state, BM_INITIAL);
 
 	ConditionVariableInit(&pstate->cv);
 
@@ -565,7 +556,7 @@ ExecBitmapHeapReInitializeDSM(BitmapHeapScanState *node,
 	if (dsa == NULL)
 		return;
 
-	pstate->state = BM_INITIAL;
+	pg_atomic_write_u32(&pstate->state, BM_INITIAL);
 
 	if (DsaPointerIsValid(pstate->tbmiterator))
 		tbm_free_shared_area(dsa, pstate->tbmiterator);
-- 
2.50.1 (Apple Git-155)


--Ot5x3ffkWEuxilWO
Content-Type: text/plain; charset=us-ascii
Content-Disposition: attachment;
	filename=v1-0003-convert-FixedParallelState-last_xlog_end-to-an-at.patch



^ permalink  raw  reply  [nested|flat] 440+ messages in thread

* [PATCH v2 2/9] convert ParallelBitmapHeapState->state to an atomic
@ 2026-07-09 18:38 Nathan Bossart <nathan@postgresql.org>
  0 siblings, 0 replies; 440+ messages in thread

From: Nathan Bossart @ 2026-07-09 18:38 UTC (permalink / raw)

---
 src/backend/executor/nodeBitmapHeapscan.c | 23 +++++++----------------
 1 file changed, 7 insertions(+), 16 deletions(-)

diff --git a/src/backend/executor/nodeBitmapHeapscan.c b/src/backend/executor/nodeBitmapHeapscan.c
index 83d6478bc2b..a9e83f30687 100644
--- a/src/backend/executor/nodeBitmapHeapscan.c
+++ b/src/backend/executor/nodeBitmapHeapscan.c
@@ -79,7 +79,6 @@ typedef enum
 /* ----------------
  *	 ParallelBitmapHeapState information
  *		tbmiterator				iterator for scanning current pages
- *		mutex					mutual exclusion for state
  *		state					current state of the TIDBitmap
  *		cv						conditional wait variable
  * ----------------
@@ -87,8 +86,7 @@ typedef enum
 typedef struct ParallelBitmapHeapState
 {
 	dsa_pointer tbmiterator;
-	slock_t		mutex;
-	SharedBitmapState state;
+	pg_atomic_uint32 state;
 	ConditionVariable cv;
 } ParallelBitmapHeapState;
 
@@ -228,9 +226,7 @@ BitmapHeapNext(BitmapHeapScanState *node)
 static inline void
 BitmapDoneInitializingSharedState(ParallelBitmapHeapState *pstate)
 {
-	SpinLockAcquire(&pstate->mutex);
-	pstate->state = BM_FINISHED;
-	SpinLockRelease(&pstate->mutex);
+	pg_atomic_write_membarrier_u32(&pstate->state, BM_FINISHED);
 	ConditionVariableBroadcast(&pstate->cv);
 }
 
@@ -476,15 +472,12 @@ ExecInitBitmapHeapScan(BitmapHeapScan *node, EState *estate, int eflags)
 static bool
 BitmapShouldInitializeSharedState(ParallelBitmapHeapState *pstate)
 {
-	SharedBitmapState state;
+	uint32		state;
 
 	while (1)
 	{
-		SpinLockAcquire(&pstate->mutex);
-		state = pstate->state;
-		if (pstate->state == BM_INITIAL)
-			pstate->state = BM_INPROGRESS;
-		SpinLockRelease(&pstate->mutex);
+		state = BM_INITIAL;
+		pg_atomic_compare_exchange_u32(&pstate->state, &state, BM_INPROGRESS);
 
 		/* Exit if bitmap is done, or if we're the leader. */
 		if (state != BM_INPROGRESS)
@@ -538,9 +531,7 @@ ExecBitmapHeapInitializeDSM(BitmapHeapScanState *node,
 
 	pstate->tbmiterator = 0;
 
-	/* Initialize the mutex */
-	SpinLockInit(&pstate->mutex);
-	pstate->state = BM_INITIAL;
+	pg_atomic_init_u32(&pstate->state, BM_INITIAL);
 
 	ConditionVariableInit(&pstate->cv);
 
@@ -565,7 +556,7 @@ ExecBitmapHeapReInitializeDSM(BitmapHeapScanState *node,
 	if (dsa == NULL)
 		return;
 
-	pstate->state = BM_INITIAL;
+	pg_atomic_write_u32(&pstate->state, BM_INITIAL);
 
 	if (DsaPointerIsValid(pstate->tbmiterator))
 		tbm_free_shared_area(dsa, pstate->tbmiterator);
-- 
2.50.1 (Apple Git-155)


--Xf36GNcW+0xZNily
Content-Type: text/plain; charset=us-ascii
Content-Disposition: attachment;
	filename=v2-0003-convert-FixedParallelState-last_xlog_end-to-an-at.patch



^ permalink  raw  reply  [nested|flat] 440+ messages in thread

* [PATCH v1 2/8] convert ParallelBitmapHeapState->state to an atomic
@ 2026-07-09 18:38 Nathan Bossart <nathan@postgresql.org>
  0 siblings, 0 replies; 440+ messages in thread

From: Nathan Bossart @ 2026-07-09 18:38 UTC (permalink / raw)

---
 src/backend/executor/nodeBitmapHeapscan.c | 21 ++++++---------------
 1 file changed, 6 insertions(+), 15 deletions(-)

diff --git a/src/backend/executor/nodeBitmapHeapscan.c b/src/backend/executor/nodeBitmapHeapscan.c
index 83d6478bc2b..f2bb487bf10 100644
--- a/src/backend/executor/nodeBitmapHeapscan.c
+++ b/src/backend/executor/nodeBitmapHeapscan.c
@@ -79,7 +79,6 @@ typedef enum
 /* ----------------
  *	 ParallelBitmapHeapState information
  *		tbmiterator				iterator for scanning current pages
- *		mutex					mutual exclusion for state
  *		state					current state of the TIDBitmap
  *		cv						conditional wait variable
  * ----------------
@@ -87,8 +86,7 @@ typedef enum
 typedef struct ParallelBitmapHeapState
 {
 	dsa_pointer tbmiterator;
-	slock_t		mutex;
-	SharedBitmapState state;
+	pg_atomic_uint32 state;
 	ConditionVariable cv;
 } ParallelBitmapHeapState;
 
@@ -228,9 +226,7 @@ BitmapHeapNext(BitmapHeapScanState *node)
 static inline void
 BitmapDoneInitializingSharedState(ParallelBitmapHeapState *pstate)
 {
-	SpinLockAcquire(&pstate->mutex);
-	pstate->state = BM_FINISHED;
-	SpinLockRelease(&pstate->mutex);
+	pg_atomic_write_membarrier_u32(&pstate->state, BM_FINISHED);
 	ConditionVariableBroadcast(&pstate->cv);
 }
 
@@ -480,11 +476,8 @@ BitmapShouldInitializeSharedState(ParallelBitmapHeapState *pstate)
 
 	while (1)
 	{
-		SpinLockAcquire(&pstate->mutex);
-		state = pstate->state;
-		if (pstate->state == BM_INITIAL)
-			pstate->state = BM_INPROGRESS;
-		SpinLockRelease(&pstate->mutex);
+		state = BM_INITIAL;
+		pg_atomic_compare_exchange_u32(&pstate->state, &state, BM_INPROGRESS);
 
 		/* Exit if bitmap is done, or if we're the leader. */
 		if (state != BM_INPROGRESS)
@@ -538,9 +531,7 @@ ExecBitmapHeapInitializeDSM(BitmapHeapScanState *node,
 
 	pstate->tbmiterator = 0;
 
-	/* Initialize the mutex */
-	SpinLockInit(&pstate->mutex);
-	pstate->state = BM_INITIAL;
+	pg_atomic_init_u32(&pstate->state, BM_INITIAL);
 
 	ConditionVariableInit(&pstate->cv);
 
@@ -565,7 +556,7 @@ ExecBitmapHeapReInitializeDSM(BitmapHeapScanState *node,
 	if (dsa == NULL)
 		return;
 
-	pstate->state = BM_INITIAL;
+	pg_atomic_write_u32(&pstate->state, BM_INITIAL);
 
 	if (DsaPointerIsValid(pstate->tbmiterator))
 		tbm_free_shared_area(dsa, pstate->tbmiterator);
-- 
2.50.1 (Apple Git-155)


--Ot5x3ffkWEuxilWO
Content-Type: text/plain; charset=us-ascii
Content-Disposition: attachment;
	filename=v1-0003-convert-FixedParallelState-last_xlog_end-to-an-at.patch



^ permalink  raw  reply  [nested|flat] 440+ messages in thread

* [PATCH v1 2/8] convert ParallelBitmapHeapState->state to an atomic
@ 2026-07-09 18:38 Nathan Bossart <nathan@postgresql.org>
  0 siblings, 0 replies; 440+ messages in thread

From: Nathan Bossart @ 2026-07-09 18:38 UTC (permalink / raw)

---
 src/backend/executor/nodeBitmapHeapscan.c | 21 ++++++---------------
 1 file changed, 6 insertions(+), 15 deletions(-)

diff --git a/src/backend/executor/nodeBitmapHeapscan.c b/src/backend/executor/nodeBitmapHeapscan.c
index 83d6478bc2b..f2bb487bf10 100644
--- a/src/backend/executor/nodeBitmapHeapscan.c
+++ b/src/backend/executor/nodeBitmapHeapscan.c
@@ -79,7 +79,6 @@ typedef enum
 /* ----------------
  *	 ParallelBitmapHeapState information
  *		tbmiterator				iterator for scanning current pages
- *		mutex					mutual exclusion for state
  *		state					current state of the TIDBitmap
  *		cv						conditional wait variable
  * ----------------
@@ -87,8 +86,7 @@ typedef enum
 typedef struct ParallelBitmapHeapState
 {
 	dsa_pointer tbmiterator;
-	slock_t		mutex;
-	SharedBitmapState state;
+	pg_atomic_uint32 state;
 	ConditionVariable cv;
 } ParallelBitmapHeapState;
 
@@ -228,9 +226,7 @@ BitmapHeapNext(BitmapHeapScanState *node)
 static inline void
 BitmapDoneInitializingSharedState(ParallelBitmapHeapState *pstate)
 {
-	SpinLockAcquire(&pstate->mutex);
-	pstate->state = BM_FINISHED;
-	SpinLockRelease(&pstate->mutex);
+	pg_atomic_write_membarrier_u32(&pstate->state, BM_FINISHED);
 	ConditionVariableBroadcast(&pstate->cv);
 }
 
@@ -480,11 +476,8 @@ BitmapShouldInitializeSharedState(ParallelBitmapHeapState *pstate)
 
 	while (1)
 	{
-		SpinLockAcquire(&pstate->mutex);
-		state = pstate->state;
-		if (pstate->state == BM_INITIAL)
-			pstate->state = BM_INPROGRESS;
-		SpinLockRelease(&pstate->mutex);
+		state = BM_INITIAL;
+		pg_atomic_compare_exchange_u32(&pstate->state, &state, BM_INPROGRESS);
 
 		/* Exit if bitmap is done, or if we're the leader. */
 		if (state != BM_INPROGRESS)
@@ -538,9 +531,7 @@ ExecBitmapHeapInitializeDSM(BitmapHeapScanState *node,
 
 	pstate->tbmiterator = 0;
 
-	/* Initialize the mutex */
-	SpinLockInit(&pstate->mutex);
-	pstate->state = BM_INITIAL;
+	pg_atomic_init_u32(&pstate->state, BM_INITIAL);
 
 	ConditionVariableInit(&pstate->cv);
 
@@ -565,7 +556,7 @@ ExecBitmapHeapReInitializeDSM(BitmapHeapScanState *node,
 	if (dsa == NULL)
 		return;
 
-	pstate->state = BM_INITIAL;
+	pg_atomic_write_u32(&pstate->state, BM_INITIAL);
 
 	if (DsaPointerIsValid(pstate->tbmiterator))
 		tbm_free_shared_area(dsa, pstate->tbmiterator);
-- 
2.50.1 (Apple Git-155)


--Ot5x3ffkWEuxilWO
Content-Type: text/plain; charset=us-ascii
Content-Disposition: attachment;
	filename=v1-0003-convert-FixedParallelState-last_xlog_end-to-an-at.patch



^ permalink  raw  reply  [nested|flat] 440+ messages in thread

* [PATCH v1 2/8] convert ParallelBitmapHeapState->state to an atomic
@ 2026-07-09 18:38 Nathan Bossart <nathan@postgresql.org>
  0 siblings, 0 replies; 440+ messages in thread

From: Nathan Bossart @ 2026-07-09 18:38 UTC (permalink / raw)

---
 src/backend/executor/nodeBitmapHeapscan.c | 21 ++++++---------------
 1 file changed, 6 insertions(+), 15 deletions(-)

diff --git a/src/backend/executor/nodeBitmapHeapscan.c b/src/backend/executor/nodeBitmapHeapscan.c
index 83d6478bc2b..f2bb487bf10 100644
--- a/src/backend/executor/nodeBitmapHeapscan.c
+++ b/src/backend/executor/nodeBitmapHeapscan.c
@@ -79,7 +79,6 @@ typedef enum
 /* ----------------
  *	 ParallelBitmapHeapState information
  *		tbmiterator				iterator for scanning current pages
- *		mutex					mutual exclusion for state
  *		state					current state of the TIDBitmap
  *		cv						conditional wait variable
  * ----------------
@@ -87,8 +86,7 @@ typedef enum
 typedef struct ParallelBitmapHeapState
 {
 	dsa_pointer tbmiterator;
-	slock_t		mutex;
-	SharedBitmapState state;
+	pg_atomic_uint32 state;
 	ConditionVariable cv;
 } ParallelBitmapHeapState;
 
@@ -228,9 +226,7 @@ BitmapHeapNext(BitmapHeapScanState *node)
 static inline void
 BitmapDoneInitializingSharedState(ParallelBitmapHeapState *pstate)
 {
-	SpinLockAcquire(&pstate->mutex);
-	pstate->state = BM_FINISHED;
-	SpinLockRelease(&pstate->mutex);
+	pg_atomic_write_membarrier_u32(&pstate->state, BM_FINISHED);
 	ConditionVariableBroadcast(&pstate->cv);
 }
 
@@ -480,11 +476,8 @@ BitmapShouldInitializeSharedState(ParallelBitmapHeapState *pstate)
 
 	while (1)
 	{
-		SpinLockAcquire(&pstate->mutex);
-		state = pstate->state;
-		if (pstate->state == BM_INITIAL)
-			pstate->state = BM_INPROGRESS;
-		SpinLockRelease(&pstate->mutex);
+		state = BM_INITIAL;
+		pg_atomic_compare_exchange_u32(&pstate->state, &state, BM_INPROGRESS);
 
 		/* Exit if bitmap is done, or if we're the leader. */
 		if (state != BM_INPROGRESS)
@@ -538,9 +531,7 @@ ExecBitmapHeapInitializeDSM(BitmapHeapScanState *node,
 
 	pstate->tbmiterator = 0;
 
-	/* Initialize the mutex */
-	SpinLockInit(&pstate->mutex);
-	pstate->state = BM_INITIAL;
+	pg_atomic_init_u32(&pstate->state, BM_INITIAL);
 
 	ConditionVariableInit(&pstate->cv);
 
@@ -565,7 +556,7 @@ ExecBitmapHeapReInitializeDSM(BitmapHeapScanState *node,
 	if (dsa == NULL)
 		return;
 
-	pstate->state = BM_INITIAL;
+	pg_atomic_write_u32(&pstate->state, BM_INITIAL);
 
 	if (DsaPointerIsValid(pstate->tbmiterator))
 		tbm_free_shared_area(dsa, pstate->tbmiterator);
-- 
2.50.1 (Apple Git-155)


--Ot5x3ffkWEuxilWO
Content-Type: text/plain; charset=us-ascii
Content-Disposition: attachment;
	filename=v1-0003-convert-FixedParallelState-last_xlog_end-to-an-at.patch



^ permalink  raw  reply  [nested|flat] 440+ messages in thread

* [PATCH v1 2/8] convert ParallelBitmapHeapState->state to an atomic
@ 2026-07-09 18:38 Nathan Bossart <nathan@postgresql.org>
  0 siblings, 0 replies; 440+ messages in thread

From: Nathan Bossart @ 2026-07-09 18:38 UTC (permalink / raw)

---
 src/backend/executor/nodeBitmapHeapscan.c | 21 ++++++---------------
 1 file changed, 6 insertions(+), 15 deletions(-)

diff --git a/src/backend/executor/nodeBitmapHeapscan.c b/src/backend/executor/nodeBitmapHeapscan.c
index 83d6478bc2b..f2bb487bf10 100644
--- a/src/backend/executor/nodeBitmapHeapscan.c
+++ b/src/backend/executor/nodeBitmapHeapscan.c
@@ -79,7 +79,6 @@ typedef enum
 /* ----------------
  *	 ParallelBitmapHeapState information
  *		tbmiterator				iterator for scanning current pages
- *		mutex					mutual exclusion for state
  *		state					current state of the TIDBitmap
  *		cv						conditional wait variable
  * ----------------
@@ -87,8 +86,7 @@ typedef enum
 typedef struct ParallelBitmapHeapState
 {
 	dsa_pointer tbmiterator;
-	slock_t		mutex;
-	SharedBitmapState state;
+	pg_atomic_uint32 state;
 	ConditionVariable cv;
 } ParallelBitmapHeapState;
 
@@ -228,9 +226,7 @@ BitmapHeapNext(BitmapHeapScanState *node)
 static inline void
 BitmapDoneInitializingSharedState(ParallelBitmapHeapState *pstate)
 {
-	SpinLockAcquire(&pstate->mutex);
-	pstate->state = BM_FINISHED;
-	SpinLockRelease(&pstate->mutex);
+	pg_atomic_write_membarrier_u32(&pstate->state, BM_FINISHED);
 	ConditionVariableBroadcast(&pstate->cv);
 }
 
@@ -480,11 +476,8 @@ BitmapShouldInitializeSharedState(ParallelBitmapHeapState *pstate)
 
 	while (1)
 	{
-		SpinLockAcquire(&pstate->mutex);
-		state = pstate->state;
-		if (pstate->state == BM_INITIAL)
-			pstate->state = BM_INPROGRESS;
-		SpinLockRelease(&pstate->mutex);
+		state = BM_INITIAL;
+		pg_atomic_compare_exchange_u32(&pstate->state, &state, BM_INPROGRESS);
 
 		/* Exit if bitmap is done, or if we're the leader. */
 		if (state != BM_INPROGRESS)
@@ -538,9 +531,7 @@ ExecBitmapHeapInitializeDSM(BitmapHeapScanState *node,
 
 	pstate->tbmiterator = 0;
 
-	/* Initialize the mutex */
-	SpinLockInit(&pstate->mutex);
-	pstate->state = BM_INITIAL;
+	pg_atomic_init_u32(&pstate->state, BM_INITIAL);
 
 	ConditionVariableInit(&pstate->cv);
 
@@ -565,7 +556,7 @@ ExecBitmapHeapReInitializeDSM(BitmapHeapScanState *node,
 	if (dsa == NULL)
 		return;
 
-	pstate->state = BM_INITIAL;
+	pg_atomic_write_u32(&pstate->state, BM_INITIAL);
 
 	if (DsaPointerIsValid(pstate->tbmiterator))
 		tbm_free_shared_area(dsa, pstate->tbmiterator);
-- 
2.50.1 (Apple Git-155)


--Ot5x3ffkWEuxilWO
Content-Type: text/plain; charset=us-ascii
Content-Disposition: attachment;
	filename=v1-0003-convert-FixedParallelState-last_xlog_end-to-an-at.patch



^ permalink  raw  reply  [nested|flat] 440+ messages in thread

* [PATCH v1 2/8] convert ParallelBitmapHeapState->state to an atomic
@ 2026-07-09 18:38 Nathan Bossart <nathan@postgresql.org>
  0 siblings, 0 replies; 440+ messages in thread

From: Nathan Bossart @ 2026-07-09 18:38 UTC (permalink / raw)

---
 src/backend/executor/nodeBitmapHeapscan.c | 21 ++++++---------------
 1 file changed, 6 insertions(+), 15 deletions(-)

diff --git a/src/backend/executor/nodeBitmapHeapscan.c b/src/backend/executor/nodeBitmapHeapscan.c
index 83d6478bc2b..f2bb487bf10 100644
--- a/src/backend/executor/nodeBitmapHeapscan.c
+++ b/src/backend/executor/nodeBitmapHeapscan.c
@@ -79,7 +79,6 @@ typedef enum
 /* ----------------
  *	 ParallelBitmapHeapState information
  *		tbmiterator				iterator for scanning current pages
- *		mutex					mutual exclusion for state
  *		state					current state of the TIDBitmap
  *		cv						conditional wait variable
  * ----------------
@@ -87,8 +86,7 @@ typedef enum
 typedef struct ParallelBitmapHeapState
 {
 	dsa_pointer tbmiterator;
-	slock_t		mutex;
-	SharedBitmapState state;
+	pg_atomic_uint32 state;
 	ConditionVariable cv;
 } ParallelBitmapHeapState;
 
@@ -228,9 +226,7 @@ BitmapHeapNext(BitmapHeapScanState *node)
 static inline void
 BitmapDoneInitializingSharedState(ParallelBitmapHeapState *pstate)
 {
-	SpinLockAcquire(&pstate->mutex);
-	pstate->state = BM_FINISHED;
-	SpinLockRelease(&pstate->mutex);
+	pg_atomic_write_membarrier_u32(&pstate->state, BM_FINISHED);
 	ConditionVariableBroadcast(&pstate->cv);
 }
 
@@ -480,11 +476,8 @@ BitmapShouldInitializeSharedState(ParallelBitmapHeapState *pstate)
 
 	while (1)
 	{
-		SpinLockAcquire(&pstate->mutex);
-		state = pstate->state;
-		if (pstate->state == BM_INITIAL)
-			pstate->state = BM_INPROGRESS;
-		SpinLockRelease(&pstate->mutex);
+		state = BM_INITIAL;
+		pg_atomic_compare_exchange_u32(&pstate->state, &state, BM_INPROGRESS);
 
 		/* Exit if bitmap is done, or if we're the leader. */
 		if (state != BM_INPROGRESS)
@@ -538,9 +531,7 @@ ExecBitmapHeapInitializeDSM(BitmapHeapScanState *node,
 
 	pstate->tbmiterator = 0;
 
-	/* Initialize the mutex */
-	SpinLockInit(&pstate->mutex);
-	pstate->state = BM_INITIAL;
+	pg_atomic_init_u32(&pstate->state, BM_INITIAL);
 
 	ConditionVariableInit(&pstate->cv);
 
@@ -565,7 +556,7 @@ ExecBitmapHeapReInitializeDSM(BitmapHeapScanState *node,
 	if (dsa == NULL)
 		return;
 
-	pstate->state = BM_INITIAL;
+	pg_atomic_write_u32(&pstate->state, BM_INITIAL);
 
 	if (DsaPointerIsValid(pstate->tbmiterator))
 		tbm_free_shared_area(dsa, pstate->tbmiterator);
-- 
2.50.1 (Apple Git-155)


--Ot5x3ffkWEuxilWO
Content-Type: text/plain; charset=us-ascii
Content-Disposition: attachment;
	filename=v1-0003-convert-FixedParallelState-last_xlog_end-to-an-at.patch



^ permalink  raw  reply  [nested|flat] 440+ messages in thread

* [PATCH v1 2/8] convert ParallelBitmapHeapState->state to an atomic
@ 2026-07-09 18:38 Nathan Bossart <nathan@postgresql.org>
  0 siblings, 0 replies; 440+ messages in thread

From: Nathan Bossart @ 2026-07-09 18:38 UTC (permalink / raw)

---
 src/backend/executor/nodeBitmapHeapscan.c | 21 ++++++---------------
 1 file changed, 6 insertions(+), 15 deletions(-)

diff --git a/src/backend/executor/nodeBitmapHeapscan.c b/src/backend/executor/nodeBitmapHeapscan.c
index 83d6478bc2b..f2bb487bf10 100644
--- a/src/backend/executor/nodeBitmapHeapscan.c
+++ b/src/backend/executor/nodeBitmapHeapscan.c
@@ -79,7 +79,6 @@ typedef enum
 /* ----------------
  *	 ParallelBitmapHeapState information
  *		tbmiterator				iterator for scanning current pages
- *		mutex					mutual exclusion for state
  *		state					current state of the TIDBitmap
  *		cv						conditional wait variable
  * ----------------
@@ -87,8 +86,7 @@ typedef enum
 typedef struct ParallelBitmapHeapState
 {
 	dsa_pointer tbmiterator;
-	slock_t		mutex;
-	SharedBitmapState state;
+	pg_atomic_uint32 state;
 	ConditionVariable cv;
 } ParallelBitmapHeapState;
 
@@ -228,9 +226,7 @@ BitmapHeapNext(BitmapHeapScanState *node)
 static inline void
 BitmapDoneInitializingSharedState(ParallelBitmapHeapState *pstate)
 {
-	SpinLockAcquire(&pstate->mutex);
-	pstate->state = BM_FINISHED;
-	SpinLockRelease(&pstate->mutex);
+	pg_atomic_write_membarrier_u32(&pstate->state, BM_FINISHED);
 	ConditionVariableBroadcast(&pstate->cv);
 }
 
@@ -480,11 +476,8 @@ BitmapShouldInitializeSharedState(ParallelBitmapHeapState *pstate)
 
 	while (1)
 	{
-		SpinLockAcquire(&pstate->mutex);
-		state = pstate->state;
-		if (pstate->state == BM_INITIAL)
-			pstate->state = BM_INPROGRESS;
-		SpinLockRelease(&pstate->mutex);
+		state = BM_INITIAL;
+		pg_atomic_compare_exchange_u32(&pstate->state, &state, BM_INPROGRESS);
 
 		/* Exit if bitmap is done, or if we're the leader. */
 		if (state != BM_INPROGRESS)
@@ -538,9 +531,7 @@ ExecBitmapHeapInitializeDSM(BitmapHeapScanState *node,
 
 	pstate->tbmiterator = 0;
 
-	/* Initialize the mutex */
-	SpinLockInit(&pstate->mutex);
-	pstate->state = BM_INITIAL;
+	pg_atomic_init_u32(&pstate->state, BM_INITIAL);
 
 	ConditionVariableInit(&pstate->cv);
 
@@ -565,7 +556,7 @@ ExecBitmapHeapReInitializeDSM(BitmapHeapScanState *node,
 	if (dsa == NULL)
 		return;
 
-	pstate->state = BM_INITIAL;
+	pg_atomic_write_u32(&pstate->state, BM_INITIAL);
 
 	if (DsaPointerIsValid(pstate->tbmiterator))
 		tbm_free_shared_area(dsa, pstate->tbmiterator);
-- 
2.50.1 (Apple Git-155)


--Ot5x3ffkWEuxilWO
Content-Type: text/plain; charset=us-ascii
Content-Disposition: attachment;
	filename=v1-0003-convert-FixedParallelState-last_xlog_end-to-an-at.patch



^ permalink  raw  reply  [nested|flat] 440+ messages in thread

* [PATCH v1 2/8] convert ParallelBitmapHeapState->state to an atomic
@ 2026-07-09 18:38 Nathan Bossart <nathan@postgresql.org>
  0 siblings, 0 replies; 440+ messages in thread

From: Nathan Bossart @ 2026-07-09 18:38 UTC (permalink / raw)

---
 src/backend/executor/nodeBitmapHeapscan.c | 21 ++++++---------------
 1 file changed, 6 insertions(+), 15 deletions(-)

diff --git a/src/backend/executor/nodeBitmapHeapscan.c b/src/backend/executor/nodeBitmapHeapscan.c
index 83d6478bc2b..f2bb487bf10 100644
--- a/src/backend/executor/nodeBitmapHeapscan.c
+++ b/src/backend/executor/nodeBitmapHeapscan.c
@@ -79,7 +79,6 @@ typedef enum
 /* ----------------
  *	 ParallelBitmapHeapState information
  *		tbmiterator				iterator for scanning current pages
- *		mutex					mutual exclusion for state
  *		state					current state of the TIDBitmap
  *		cv						conditional wait variable
  * ----------------
@@ -87,8 +86,7 @@ typedef enum
 typedef struct ParallelBitmapHeapState
 {
 	dsa_pointer tbmiterator;
-	slock_t		mutex;
-	SharedBitmapState state;
+	pg_atomic_uint32 state;
 	ConditionVariable cv;
 } ParallelBitmapHeapState;
 
@@ -228,9 +226,7 @@ BitmapHeapNext(BitmapHeapScanState *node)
 static inline void
 BitmapDoneInitializingSharedState(ParallelBitmapHeapState *pstate)
 {
-	SpinLockAcquire(&pstate->mutex);
-	pstate->state = BM_FINISHED;
-	SpinLockRelease(&pstate->mutex);
+	pg_atomic_write_membarrier_u32(&pstate->state, BM_FINISHED);
 	ConditionVariableBroadcast(&pstate->cv);
 }
 
@@ -480,11 +476,8 @@ BitmapShouldInitializeSharedState(ParallelBitmapHeapState *pstate)
 
 	while (1)
 	{
-		SpinLockAcquire(&pstate->mutex);
-		state = pstate->state;
-		if (pstate->state == BM_INITIAL)
-			pstate->state = BM_INPROGRESS;
-		SpinLockRelease(&pstate->mutex);
+		state = BM_INITIAL;
+		pg_atomic_compare_exchange_u32(&pstate->state, &state, BM_INPROGRESS);
 
 		/* Exit if bitmap is done, or if we're the leader. */
 		if (state != BM_INPROGRESS)
@@ -538,9 +531,7 @@ ExecBitmapHeapInitializeDSM(BitmapHeapScanState *node,
 
 	pstate->tbmiterator = 0;
 
-	/* Initialize the mutex */
-	SpinLockInit(&pstate->mutex);
-	pstate->state = BM_INITIAL;
+	pg_atomic_init_u32(&pstate->state, BM_INITIAL);
 
 	ConditionVariableInit(&pstate->cv);
 
@@ -565,7 +556,7 @@ ExecBitmapHeapReInitializeDSM(BitmapHeapScanState *node,
 	if (dsa == NULL)
 		return;
 
-	pstate->state = BM_INITIAL;
+	pg_atomic_write_u32(&pstate->state, BM_INITIAL);
 
 	if (DsaPointerIsValid(pstate->tbmiterator))
 		tbm_free_shared_area(dsa, pstate->tbmiterator);
-- 
2.50.1 (Apple Git-155)


--Ot5x3ffkWEuxilWO
Content-Type: text/plain; charset=us-ascii
Content-Disposition: attachment;
	filename=v1-0003-convert-FixedParallelState-last_xlog_end-to-an-at.patch



^ permalink  raw  reply  [nested|flat] 440+ messages in thread

* [PATCH v1 2/8] convert ParallelBitmapHeapState->state to an atomic
@ 2026-07-09 18:38 Nathan Bossart <nathan@postgresql.org>
  0 siblings, 0 replies; 440+ messages in thread

From: Nathan Bossart @ 2026-07-09 18:38 UTC (permalink / raw)

---
 src/backend/executor/nodeBitmapHeapscan.c | 21 ++++++---------------
 1 file changed, 6 insertions(+), 15 deletions(-)

diff --git a/src/backend/executor/nodeBitmapHeapscan.c b/src/backend/executor/nodeBitmapHeapscan.c
index 83d6478bc2b..f2bb487bf10 100644
--- a/src/backend/executor/nodeBitmapHeapscan.c
+++ b/src/backend/executor/nodeBitmapHeapscan.c
@@ -79,7 +79,6 @@ typedef enum
 /* ----------------
  *	 ParallelBitmapHeapState information
  *		tbmiterator				iterator for scanning current pages
- *		mutex					mutual exclusion for state
  *		state					current state of the TIDBitmap
  *		cv						conditional wait variable
  * ----------------
@@ -87,8 +86,7 @@ typedef enum
 typedef struct ParallelBitmapHeapState
 {
 	dsa_pointer tbmiterator;
-	slock_t		mutex;
-	SharedBitmapState state;
+	pg_atomic_uint32 state;
 	ConditionVariable cv;
 } ParallelBitmapHeapState;
 
@@ -228,9 +226,7 @@ BitmapHeapNext(BitmapHeapScanState *node)
 static inline void
 BitmapDoneInitializingSharedState(ParallelBitmapHeapState *pstate)
 {
-	SpinLockAcquire(&pstate->mutex);
-	pstate->state = BM_FINISHED;
-	SpinLockRelease(&pstate->mutex);
+	pg_atomic_write_membarrier_u32(&pstate->state, BM_FINISHED);
 	ConditionVariableBroadcast(&pstate->cv);
 }
 
@@ -480,11 +476,8 @@ BitmapShouldInitializeSharedState(ParallelBitmapHeapState *pstate)
 
 	while (1)
 	{
-		SpinLockAcquire(&pstate->mutex);
-		state = pstate->state;
-		if (pstate->state == BM_INITIAL)
-			pstate->state = BM_INPROGRESS;
-		SpinLockRelease(&pstate->mutex);
+		state = BM_INITIAL;
+		pg_atomic_compare_exchange_u32(&pstate->state, &state, BM_INPROGRESS);
 
 		/* Exit if bitmap is done, or if we're the leader. */
 		if (state != BM_INPROGRESS)
@@ -538,9 +531,7 @@ ExecBitmapHeapInitializeDSM(BitmapHeapScanState *node,
 
 	pstate->tbmiterator = 0;
 
-	/* Initialize the mutex */
-	SpinLockInit(&pstate->mutex);
-	pstate->state = BM_INITIAL;
+	pg_atomic_init_u32(&pstate->state, BM_INITIAL);
 
 	ConditionVariableInit(&pstate->cv);
 
@@ -565,7 +556,7 @@ ExecBitmapHeapReInitializeDSM(BitmapHeapScanState *node,
 	if (dsa == NULL)
 		return;
 
-	pstate->state = BM_INITIAL;
+	pg_atomic_write_u32(&pstate->state, BM_INITIAL);
 
 	if (DsaPointerIsValid(pstate->tbmiterator))
 		tbm_free_shared_area(dsa, pstate->tbmiterator);
-- 
2.50.1 (Apple Git-155)


--Ot5x3ffkWEuxilWO
Content-Type: text/plain; charset=us-ascii
Content-Disposition: attachment;
	filename=v1-0003-convert-FixedParallelState-last_xlog_end-to-an-at.patch



^ permalink  raw  reply  [nested|flat] 440+ messages in thread

* [PATCH v1 2/8] convert ParallelBitmapHeapState->state to an atomic
@ 2026-07-09 18:38 Nathan Bossart <nathan@postgresql.org>
  0 siblings, 0 replies; 440+ messages in thread

From: Nathan Bossart @ 2026-07-09 18:38 UTC (permalink / raw)

---
 src/backend/executor/nodeBitmapHeapscan.c | 21 ++++++---------------
 1 file changed, 6 insertions(+), 15 deletions(-)

diff --git a/src/backend/executor/nodeBitmapHeapscan.c b/src/backend/executor/nodeBitmapHeapscan.c
index 83d6478bc2b..f2bb487bf10 100644
--- a/src/backend/executor/nodeBitmapHeapscan.c
+++ b/src/backend/executor/nodeBitmapHeapscan.c
@@ -79,7 +79,6 @@ typedef enum
 /* ----------------
  *	 ParallelBitmapHeapState information
  *		tbmiterator				iterator for scanning current pages
- *		mutex					mutual exclusion for state
  *		state					current state of the TIDBitmap
  *		cv						conditional wait variable
  * ----------------
@@ -87,8 +86,7 @@ typedef enum
 typedef struct ParallelBitmapHeapState
 {
 	dsa_pointer tbmiterator;
-	slock_t		mutex;
-	SharedBitmapState state;
+	pg_atomic_uint32 state;
 	ConditionVariable cv;
 } ParallelBitmapHeapState;
 
@@ -228,9 +226,7 @@ BitmapHeapNext(BitmapHeapScanState *node)
 static inline void
 BitmapDoneInitializingSharedState(ParallelBitmapHeapState *pstate)
 {
-	SpinLockAcquire(&pstate->mutex);
-	pstate->state = BM_FINISHED;
-	SpinLockRelease(&pstate->mutex);
+	pg_atomic_write_membarrier_u32(&pstate->state, BM_FINISHED);
 	ConditionVariableBroadcast(&pstate->cv);
 }
 
@@ -480,11 +476,8 @@ BitmapShouldInitializeSharedState(ParallelBitmapHeapState *pstate)
 
 	while (1)
 	{
-		SpinLockAcquire(&pstate->mutex);
-		state = pstate->state;
-		if (pstate->state == BM_INITIAL)
-			pstate->state = BM_INPROGRESS;
-		SpinLockRelease(&pstate->mutex);
+		state = BM_INITIAL;
+		pg_atomic_compare_exchange_u32(&pstate->state, &state, BM_INPROGRESS);
 
 		/* Exit if bitmap is done, or if we're the leader. */
 		if (state != BM_INPROGRESS)
@@ -538,9 +531,7 @@ ExecBitmapHeapInitializeDSM(BitmapHeapScanState *node,
 
 	pstate->tbmiterator = 0;
 
-	/* Initialize the mutex */
-	SpinLockInit(&pstate->mutex);
-	pstate->state = BM_INITIAL;
+	pg_atomic_init_u32(&pstate->state, BM_INITIAL);
 
 	ConditionVariableInit(&pstate->cv);
 
@@ -565,7 +556,7 @@ ExecBitmapHeapReInitializeDSM(BitmapHeapScanState *node,
 	if (dsa == NULL)
 		return;
 
-	pstate->state = BM_INITIAL;
+	pg_atomic_write_u32(&pstate->state, BM_INITIAL);
 
 	if (DsaPointerIsValid(pstate->tbmiterator))
 		tbm_free_shared_area(dsa, pstate->tbmiterator);
-- 
2.50.1 (Apple Git-155)


--Ot5x3ffkWEuxilWO
Content-Type: text/plain; charset=us-ascii
Content-Disposition: attachment;
	filename=v1-0003-convert-FixedParallelState-last_xlog_end-to-an-at.patch



^ permalink  raw  reply  [nested|flat] 440+ messages in thread

* [PATCH v1 2/8] convert ParallelBitmapHeapState->state to an atomic
@ 2026-07-09 18:38 Nathan Bossart <nathan@postgresql.org>
  0 siblings, 0 replies; 440+ messages in thread

From: Nathan Bossart @ 2026-07-09 18:38 UTC (permalink / raw)

---
 src/backend/executor/nodeBitmapHeapscan.c | 21 ++++++---------------
 1 file changed, 6 insertions(+), 15 deletions(-)

diff --git a/src/backend/executor/nodeBitmapHeapscan.c b/src/backend/executor/nodeBitmapHeapscan.c
index 83d6478bc2b..f2bb487bf10 100644
--- a/src/backend/executor/nodeBitmapHeapscan.c
+++ b/src/backend/executor/nodeBitmapHeapscan.c
@@ -79,7 +79,6 @@ typedef enum
 /* ----------------
  *	 ParallelBitmapHeapState information
  *		tbmiterator				iterator for scanning current pages
- *		mutex					mutual exclusion for state
  *		state					current state of the TIDBitmap
  *		cv						conditional wait variable
  * ----------------
@@ -87,8 +86,7 @@ typedef enum
 typedef struct ParallelBitmapHeapState
 {
 	dsa_pointer tbmiterator;
-	slock_t		mutex;
-	SharedBitmapState state;
+	pg_atomic_uint32 state;
 	ConditionVariable cv;
 } ParallelBitmapHeapState;
 
@@ -228,9 +226,7 @@ BitmapHeapNext(BitmapHeapScanState *node)
 static inline void
 BitmapDoneInitializingSharedState(ParallelBitmapHeapState *pstate)
 {
-	SpinLockAcquire(&pstate->mutex);
-	pstate->state = BM_FINISHED;
-	SpinLockRelease(&pstate->mutex);
+	pg_atomic_write_membarrier_u32(&pstate->state, BM_FINISHED);
 	ConditionVariableBroadcast(&pstate->cv);
 }
 
@@ -480,11 +476,8 @@ BitmapShouldInitializeSharedState(ParallelBitmapHeapState *pstate)
 
 	while (1)
 	{
-		SpinLockAcquire(&pstate->mutex);
-		state = pstate->state;
-		if (pstate->state == BM_INITIAL)
-			pstate->state = BM_INPROGRESS;
-		SpinLockRelease(&pstate->mutex);
+		state = BM_INITIAL;
+		pg_atomic_compare_exchange_u32(&pstate->state, &state, BM_INPROGRESS);
 
 		/* Exit if bitmap is done, or if we're the leader. */
 		if (state != BM_INPROGRESS)
@@ -538,9 +531,7 @@ ExecBitmapHeapInitializeDSM(BitmapHeapScanState *node,
 
 	pstate->tbmiterator = 0;
 
-	/* Initialize the mutex */
-	SpinLockInit(&pstate->mutex);
-	pstate->state = BM_INITIAL;
+	pg_atomic_init_u32(&pstate->state, BM_INITIAL);
 
 	ConditionVariableInit(&pstate->cv);
 
@@ -565,7 +556,7 @@ ExecBitmapHeapReInitializeDSM(BitmapHeapScanState *node,
 	if (dsa == NULL)
 		return;
 
-	pstate->state = BM_INITIAL;
+	pg_atomic_write_u32(&pstate->state, BM_INITIAL);
 
 	if (DsaPointerIsValid(pstate->tbmiterator))
 		tbm_free_shared_area(dsa, pstate->tbmiterator);
-- 
2.50.1 (Apple Git-155)


--Ot5x3ffkWEuxilWO
Content-Type: text/plain; charset=us-ascii
Content-Disposition: attachment;
	filename=v1-0003-convert-FixedParallelState-last_xlog_end-to-an-at.patch



^ permalink  raw  reply  [nested|flat] 440+ messages in thread

* [PATCH v1 2/8] convert ParallelBitmapHeapState->state to an atomic
@ 2026-07-09 18:38 Nathan Bossart <nathan@postgresql.org>
  0 siblings, 0 replies; 440+ messages in thread

From: Nathan Bossart @ 2026-07-09 18:38 UTC (permalink / raw)

---
 src/backend/executor/nodeBitmapHeapscan.c | 21 ++++++---------------
 1 file changed, 6 insertions(+), 15 deletions(-)

diff --git a/src/backend/executor/nodeBitmapHeapscan.c b/src/backend/executor/nodeBitmapHeapscan.c
index 83d6478bc2b..f2bb487bf10 100644
--- a/src/backend/executor/nodeBitmapHeapscan.c
+++ b/src/backend/executor/nodeBitmapHeapscan.c
@@ -79,7 +79,6 @@ typedef enum
 /* ----------------
  *	 ParallelBitmapHeapState information
  *		tbmiterator				iterator for scanning current pages
- *		mutex					mutual exclusion for state
  *		state					current state of the TIDBitmap
  *		cv						conditional wait variable
  * ----------------
@@ -87,8 +86,7 @@ typedef enum
 typedef struct ParallelBitmapHeapState
 {
 	dsa_pointer tbmiterator;
-	slock_t		mutex;
-	SharedBitmapState state;
+	pg_atomic_uint32 state;
 	ConditionVariable cv;
 } ParallelBitmapHeapState;
 
@@ -228,9 +226,7 @@ BitmapHeapNext(BitmapHeapScanState *node)
 static inline void
 BitmapDoneInitializingSharedState(ParallelBitmapHeapState *pstate)
 {
-	SpinLockAcquire(&pstate->mutex);
-	pstate->state = BM_FINISHED;
-	SpinLockRelease(&pstate->mutex);
+	pg_atomic_write_membarrier_u32(&pstate->state, BM_FINISHED);
 	ConditionVariableBroadcast(&pstate->cv);
 }
 
@@ -480,11 +476,8 @@ BitmapShouldInitializeSharedState(ParallelBitmapHeapState *pstate)
 
 	while (1)
 	{
-		SpinLockAcquire(&pstate->mutex);
-		state = pstate->state;
-		if (pstate->state == BM_INITIAL)
-			pstate->state = BM_INPROGRESS;
-		SpinLockRelease(&pstate->mutex);
+		state = BM_INITIAL;
+		pg_atomic_compare_exchange_u32(&pstate->state, &state, BM_INPROGRESS);
 
 		/* Exit if bitmap is done, or if we're the leader. */
 		if (state != BM_INPROGRESS)
@@ -538,9 +531,7 @@ ExecBitmapHeapInitializeDSM(BitmapHeapScanState *node,
 
 	pstate->tbmiterator = 0;
 
-	/* Initialize the mutex */
-	SpinLockInit(&pstate->mutex);
-	pstate->state = BM_INITIAL;
+	pg_atomic_init_u32(&pstate->state, BM_INITIAL);
 
 	ConditionVariableInit(&pstate->cv);
 
@@ -565,7 +556,7 @@ ExecBitmapHeapReInitializeDSM(BitmapHeapScanState *node,
 	if (dsa == NULL)
 		return;
 
-	pstate->state = BM_INITIAL;
+	pg_atomic_write_u32(&pstate->state, BM_INITIAL);
 
 	if (DsaPointerIsValid(pstate->tbmiterator))
 		tbm_free_shared_area(dsa, pstate->tbmiterator);
-- 
2.50.1 (Apple Git-155)


--Ot5x3ffkWEuxilWO
Content-Type: text/plain; charset=us-ascii
Content-Disposition: attachment;
	filename=v1-0003-convert-FixedParallelState-last_xlog_end-to-an-at.patch



^ permalink  raw  reply  [nested|flat] 440+ messages in thread

* [PATCH v1 2/8] convert ParallelBitmapHeapState->state to an atomic
@ 2026-07-09 18:38 Nathan Bossart <nathan@postgresql.org>
  0 siblings, 0 replies; 440+ messages in thread

From: Nathan Bossart @ 2026-07-09 18:38 UTC (permalink / raw)

---
 src/backend/executor/nodeBitmapHeapscan.c | 21 ++++++---------------
 1 file changed, 6 insertions(+), 15 deletions(-)

diff --git a/src/backend/executor/nodeBitmapHeapscan.c b/src/backend/executor/nodeBitmapHeapscan.c
index 83d6478bc2b..f2bb487bf10 100644
--- a/src/backend/executor/nodeBitmapHeapscan.c
+++ b/src/backend/executor/nodeBitmapHeapscan.c
@@ -79,7 +79,6 @@ typedef enum
 /* ----------------
  *	 ParallelBitmapHeapState information
  *		tbmiterator				iterator for scanning current pages
- *		mutex					mutual exclusion for state
  *		state					current state of the TIDBitmap
  *		cv						conditional wait variable
  * ----------------
@@ -87,8 +86,7 @@ typedef enum
 typedef struct ParallelBitmapHeapState
 {
 	dsa_pointer tbmiterator;
-	slock_t		mutex;
-	SharedBitmapState state;
+	pg_atomic_uint32 state;
 	ConditionVariable cv;
 } ParallelBitmapHeapState;
 
@@ -228,9 +226,7 @@ BitmapHeapNext(BitmapHeapScanState *node)
 static inline void
 BitmapDoneInitializingSharedState(ParallelBitmapHeapState *pstate)
 {
-	SpinLockAcquire(&pstate->mutex);
-	pstate->state = BM_FINISHED;
-	SpinLockRelease(&pstate->mutex);
+	pg_atomic_write_membarrier_u32(&pstate->state, BM_FINISHED);
 	ConditionVariableBroadcast(&pstate->cv);
 }
 
@@ -480,11 +476,8 @@ BitmapShouldInitializeSharedState(ParallelBitmapHeapState *pstate)
 
 	while (1)
 	{
-		SpinLockAcquire(&pstate->mutex);
-		state = pstate->state;
-		if (pstate->state == BM_INITIAL)
-			pstate->state = BM_INPROGRESS;
-		SpinLockRelease(&pstate->mutex);
+		state = BM_INITIAL;
+		pg_atomic_compare_exchange_u32(&pstate->state, &state, BM_INPROGRESS);
 
 		/* Exit if bitmap is done, or if we're the leader. */
 		if (state != BM_INPROGRESS)
@@ -538,9 +531,7 @@ ExecBitmapHeapInitializeDSM(BitmapHeapScanState *node,
 
 	pstate->tbmiterator = 0;
 
-	/* Initialize the mutex */
-	SpinLockInit(&pstate->mutex);
-	pstate->state = BM_INITIAL;
+	pg_atomic_init_u32(&pstate->state, BM_INITIAL);
 
 	ConditionVariableInit(&pstate->cv);
 
@@ -565,7 +556,7 @@ ExecBitmapHeapReInitializeDSM(BitmapHeapScanState *node,
 	if (dsa == NULL)
 		return;
 
-	pstate->state = BM_INITIAL;
+	pg_atomic_write_u32(&pstate->state, BM_INITIAL);
 
 	if (DsaPointerIsValid(pstate->tbmiterator))
 		tbm_free_shared_area(dsa, pstate->tbmiterator);
-- 
2.50.1 (Apple Git-155)


--Ot5x3ffkWEuxilWO
Content-Type: text/plain; charset=us-ascii
Content-Disposition: attachment;
	filename=v1-0003-convert-FixedParallelState-last_xlog_end-to-an-at.patch



^ permalink  raw  reply  [nested|flat] 440+ messages in thread

* [PATCH v1 2/8] convert ParallelBitmapHeapState->state to an atomic
@ 2026-07-09 18:38 Nathan Bossart <nathan@postgresql.org>
  0 siblings, 0 replies; 440+ messages in thread

From: Nathan Bossart @ 2026-07-09 18:38 UTC (permalink / raw)

---
 src/backend/executor/nodeBitmapHeapscan.c | 21 ++++++---------------
 1 file changed, 6 insertions(+), 15 deletions(-)

diff --git a/src/backend/executor/nodeBitmapHeapscan.c b/src/backend/executor/nodeBitmapHeapscan.c
index 83d6478bc2b..f2bb487bf10 100644
--- a/src/backend/executor/nodeBitmapHeapscan.c
+++ b/src/backend/executor/nodeBitmapHeapscan.c
@@ -79,7 +79,6 @@ typedef enum
 /* ----------------
  *	 ParallelBitmapHeapState information
  *		tbmiterator				iterator for scanning current pages
- *		mutex					mutual exclusion for state
  *		state					current state of the TIDBitmap
  *		cv						conditional wait variable
  * ----------------
@@ -87,8 +86,7 @@ typedef enum
 typedef struct ParallelBitmapHeapState
 {
 	dsa_pointer tbmiterator;
-	slock_t		mutex;
-	SharedBitmapState state;
+	pg_atomic_uint32 state;
 	ConditionVariable cv;
 } ParallelBitmapHeapState;
 
@@ -228,9 +226,7 @@ BitmapHeapNext(BitmapHeapScanState *node)
 static inline void
 BitmapDoneInitializingSharedState(ParallelBitmapHeapState *pstate)
 {
-	SpinLockAcquire(&pstate->mutex);
-	pstate->state = BM_FINISHED;
-	SpinLockRelease(&pstate->mutex);
+	pg_atomic_write_membarrier_u32(&pstate->state, BM_FINISHED);
 	ConditionVariableBroadcast(&pstate->cv);
 }
 
@@ -480,11 +476,8 @@ BitmapShouldInitializeSharedState(ParallelBitmapHeapState *pstate)
 
 	while (1)
 	{
-		SpinLockAcquire(&pstate->mutex);
-		state = pstate->state;
-		if (pstate->state == BM_INITIAL)
-			pstate->state = BM_INPROGRESS;
-		SpinLockRelease(&pstate->mutex);
+		state = BM_INITIAL;
+		pg_atomic_compare_exchange_u32(&pstate->state, &state, BM_INPROGRESS);
 
 		/* Exit if bitmap is done, or if we're the leader. */
 		if (state != BM_INPROGRESS)
@@ -538,9 +531,7 @@ ExecBitmapHeapInitializeDSM(BitmapHeapScanState *node,
 
 	pstate->tbmiterator = 0;
 
-	/* Initialize the mutex */
-	SpinLockInit(&pstate->mutex);
-	pstate->state = BM_INITIAL;
+	pg_atomic_init_u32(&pstate->state, BM_INITIAL);
 
 	ConditionVariableInit(&pstate->cv);
 
@@ -565,7 +556,7 @@ ExecBitmapHeapReInitializeDSM(BitmapHeapScanState *node,
 	if (dsa == NULL)
 		return;
 
-	pstate->state = BM_INITIAL;
+	pg_atomic_write_u32(&pstate->state, BM_INITIAL);
 
 	if (DsaPointerIsValid(pstate->tbmiterator))
 		tbm_free_shared_area(dsa, pstate->tbmiterator);
-- 
2.50.1 (Apple Git-155)


--Ot5x3ffkWEuxilWO
Content-Type: text/plain; charset=us-ascii
Content-Disposition: attachment;
	filename=v1-0003-convert-FixedParallelState-last_xlog_end-to-an-at.patch



^ permalink  raw  reply  [nested|flat] 440+ messages in thread

* [PATCH v1 2/8] convert ParallelBitmapHeapState->state to an atomic
@ 2026-07-09 18:38 Nathan Bossart <nathan@postgresql.org>
  0 siblings, 0 replies; 440+ messages in thread

From: Nathan Bossart @ 2026-07-09 18:38 UTC (permalink / raw)

---
 src/backend/executor/nodeBitmapHeapscan.c | 21 ++++++---------------
 1 file changed, 6 insertions(+), 15 deletions(-)

diff --git a/src/backend/executor/nodeBitmapHeapscan.c b/src/backend/executor/nodeBitmapHeapscan.c
index 83d6478bc2b..f2bb487bf10 100644
--- a/src/backend/executor/nodeBitmapHeapscan.c
+++ b/src/backend/executor/nodeBitmapHeapscan.c
@@ -79,7 +79,6 @@ typedef enum
 /* ----------------
  *	 ParallelBitmapHeapState information
  *		tbmiterator				iterator for scanning current pages
- *		mutex					mutual exclusion for state
  *		state					current state of the TIDBitmap
  *		cv						conditional wait variable
  * ----------------
@@ -87,8 +86,7 @@ typedef enum
 typedef struct ParallelBitmapHeapState
 {
 	dsa_pointer tbmiterator;
-	slock_t		mutex;
-	SharedBitmapState state;
+	pg_atomic_uint32 state;
 	ConditionVariable cv;
 } ParallelBitmapHeapState;
 
@@ -228,9 +226,7 @@ BitmapHeapNext(BitmapHeapScanState *node)
 static inline void
 BitmapDoneInitializingSharedState(ParallelBitmapHeapState *pstate)
 {
-	SpinLockAcquire(&pstate->mutex);
-	pstate->state = BM_FINISHED;
-	SpinLockRelease(&pstate->mutex);
+	pg_atomic_write_membarrier_u32(&pstate->state, BM_FINISHED);
 	ConditionVariableBroadcast(&pstate->cv);
 }
 
@@ -480,11 +476,8 @@ BitmapShouldInitializeSharedState(ParallelBitmapHeapState *pstate)
 
 	while (1)
 	{
-		SpinLockAcquire(&pstate->mutex);
-		state = pstate->state;
-		if (pstate->state == BM_INITIAL)
-			pstate->state = BM_INPROGRESS;
-		SpinLockRelease(&pstate->mutex);
+		state = BM_INITIAL;
+		pg_atomic_compare_exchange_u32(&pstate->state, &state, BM_INPROGRESS);
 
 		/* Exit if bitmap is done, or if we're the leader. */
 		if (state != BM_INPROGRESS)
@@ -538,9 +531,7 @@ ExecBitmapHeapInitializeDSM(BitmapHeapScanState *node,
 
 	pstate->tbmiterator = 0;
 
-	/* Initialize the mutex */
-	SpinLockInit(&pstate->mutex);
-	pstate->state = BM_INITIAL;
+	pg_atomic_init_u32(&pstate->state, BM_INITIAL);
 
 	ConditionVariableInit(&pstate->cv);
 
@@ -565,7 +556,7 @@ ExecBitmapHeapReInitializeDSM(BitmapHeapScanState *node,
 	if (dsa == NULL)
 		return;
 
-	pstate->state = BM_INITIAL;
+	pg_atomic_write_u32(&pstate->state, BM_INITIAL);
 
 	if (DsaPointerIsValid(pstate->tbmiterator))
 		tbm_free_shared_area(dsa, pstate->tbmiterator);
-- 
2.50.1 (Apple Git-155)


--Ot5x3ffkWEuxilWO
Content-Type: text/plain; charset=us-ascii
Content-Disposition: attachment;
	filename=v1-0003-convert-FixedParallelState-last_xlog_end-to-an-at.patch



^ permalink  raw  reply  [nested|flat] 440+ messages in thread

* [PATCH v1 2/8] convert ParallelBitmapHeapState->state to an atomic
@ 2026-07-09 18:38 Nathan Bossart <nathan@postgresql.org>
  0 siblings, 0 replies; 440+ messages in thread

From: Nathan Bossart @ 2026-07-09 18:38 UTC (permalink / raw)

---
 src/backend/executor/nodeBitmapHeapscan.c | 21 ++++++---------------
 1 file changed, 6 insertions(+), 15 deletions(-)

diff --git a/src/backend/executor/nodeBitmapHeapscan.c b/src/backend/executor/nodeBitmapHeapscan.c
index 83d6478bc2b..f2bb487bf10 100644
--- a/src/backend/executor/nodeBitmapHeapscan.c
+++ b/src/backend/executor/nodeBitmapHeapscan.c
@@ -79,7 +79,6 @@ typedef enum
 /* ----------------
  *	 ParallelBitmapHeapState information
  *		tbmiterator				iterator for scanning current pages
- *		mutex					mutual exclusion for state
  *		state					current state of the TIDBitmap
  *		cv						conditional wait variable
  * ----------------
@@ -87,8 +86,7 @@ typedef enum
 typedef struct ParallelBitmapHeapState
 {
 	dsa_pointer tbmiterator;
-	slock_t		mutex;
-	SharedBitmapState state;
+	pg_atomic_uint32 state;
 	ConditionVariable cv;
 } ParallelBitmapHeapState;
 
@@ -228,9 +226,7 @@ BitmapHeapNext(BitmapHeapScanState *node)
 static inline void
 BitmapDoneInitializingSharedState(ParallelBitmapHeapState *pstate)
 {
-	SpinLockAcquire(&pstate->mutex);
-	pstate->state = BM_FINISHED;
-	SpinLockRelease(&pstate->mutex);
+	pg_atomic_write_membarrier_u32(&pstate->state, BM_FINISHED);
 	ConditionVariableBroadcast(&pstate->cv);
 }
 
@@ -480,11 +476,8 @@ BitmapShouldInitializeSharedState(ParallelBitmapHeapState *pstate)
 
 	while (1)
 	{
-		SpinLockAcquire(&pstate->mutex);
-		state = pstate->state;
-		if (pstate->state == BM_INITIAL)
-			pstate->state = BM_INPROGRESS;
-		SpinLockRelease(&pstate->mutex);
+		state = BM_INITIAL;
+		pg_atomic_compare_exchange_u32(&pstate->state, &state, BM_INPROGRESS);
 
 		/* Exit if bitmap is done, or if we're the leader. */
 		if (state != BM_INPROGRESS)
@@ -538,9 +531,7 @@ ExecBitmapHeapInitializeDSM(BitmapHeapScanState *node,
 
 	pstate->tbmiterator = 0;
 
-	/* Initialize the mutex */
-	SpinLockInit(&pstate->mutex);
-	pstate->state = BM_INITIAL;
+	pg_atomic_init_u32(&pstate->state, BM_INITIAL);
 
 	ConditionVariableInit(&pstate->cv);
 
@@ -565,7 +556,7 @@ ExecBitmapHeapReInitializeDSM(BitmapHeapScanState *node,
 	if (dsa == NULL)
 		return;
 
-	pstate->state = BM_INITIAL;
+	pg_atomic_write_u32(&pstate->state, BM_INITIAL);
 
 	if (DsaPointerIsValid(pstate->tbmiterator))
 		tbm_free_shared_area(dsa, pstate->tbmiterator);
-- 
2.50.1 (Apple Git-155)


--Ot5x3ffkWEuxilWO
Content-Type: text/plain; charset=us-ascii
Content-Disposition: attachment;
	filename=v1-0003-convert-FixedParallelState-last_xlog_end-to-an-at.patch



^ permalink  raw  reply  [nested|flat] 440+ messages in thread

* [PATCH v1 2/8] convert ParallelBitmapHeapState->state to an atomic
@ 2026-07-09 18:38 Nathan Bossart <nathan@postgresql.org>
  0 siblings, 0 replies; 440+ messages in thread

From: Nathan Bossart @ 2026-07-09 18:38 UTC (permalink / raw)

---
 src/backend/executor/nodeBitmapHeapscan.c | 21 ++++++---------------
 1 file changed, 6 insertions(+), 15 deletions(-)

diff --git a/src/backend/executor/nodeBitmapHeapscan.c b/src/backend/executor/nodeBitmapHeapscan.c
index 83d6478bc2b..f2bb487bf10 100644
--- a/src/backend/executor/nodeBitmapHeapscan.c
+++ b/src/backend/executor/nodeBitmapHeapscan.c
@@ -79,7 +79,6 @@ typedef enum
 /* ----------------
  *	 ParallelBitmapHeapState information
  *		tbmiterator				iterator for scanning current pages
- *		mutex					mutual exclusion for state
  *		state					current state of the TIDBitmap
  *		cv						conditional wait variable
  * ----------------
@@ -87,8 +86,7 @@ typedef enum
 typedef struct ParallelBitmapHeapState
 {
 	dsa_pointer tbmiterator;
-	slock_t		mutex;
-	SharedBitmapState state;
+	pg_atomic_uint32 state;
 	ConditionVariable cv;
 } ParallelBitmapHeapState;
 
@@ -228,9 +226,7 @@ BitmapHeapNext(BitmapHeapScanState *node)
 static inline void
 BitmapDoneInitializingSharedState(ParallelBitmapHeapState *pstate)
 {
-	SpinLockAcquire(&pstate->mutex);
-	pstate->state = BM_FINISHED;
-	SpinLockRelease(&pstate->mutex);
+	pg_atomic_write_membarrier_u32(&pstate->state, BM_FINISHED);
 	ConditionVariableBroadcast(&pstate->cv);
 }
 
@@ -480,11 +476,8 @@ BitmapShouldInitializeSharedState(ParallelBitmapHeapState *pstate)
 
 	while (1)
 	{
-		SpinLockAcquire(&pstate->mutex);
-		state = pstate->state;
-		if (pstate->state == BM_INITIAL)
-			pstate->state = BM_INPROGRESS;
-		SpinLockRelease(&pstate->mutex);
+		state = BM_INITIAL;
+		pg_atomic_compare_exchange_u32(&pstate->state, &state, BM_INPROGRESS);
 
 		/* Exit if bitmap is done, or if we're the leader. */
 		if (state != BM_INPROGRESS)
@@ -538,9 +531,7 @@ ExecBitmapHeapInitializeDSM(BitmapHeapScanState *node,
 
 	pstate->tbmiterator = 0;
 
-	/* Initialize the mutex */
-	SpinLockInit(&pstate->mutex);
-	pstate->state = BM_INITIAL;
+	pg_atomic_init_u32(&pstate->state, BM_INITIAL);
 
 	ConditionVariableInit(&pstate->cv);
 
@@ -565,7 +556,7 @@ ExecBitmapHeapReInitializeDSM(BitmapHeapScanState *node,
 	if (dsa == NULL)
 		return;
 
-	pstate->state = BM_INITIAL;
+	pg_atomic_write_u32(&pstate->state, BM_INITIAL);
 
 	if (DsaPointerIsValid(pstate->tbmiterator))
 		tbm_free_shared_area(dsa, pstate->tbmiterator);
-- 
2.50.1 (Apple Git-155)


--Ot5x3ffkWEuxilWO
Content-Type: text/plain; charset=us-ascii
Content-Disposition: attachment;
	filename=v1-0003-convert-FixedParallelState-last_xlog_end-to-an-at.patch



^ permalink  raw  reply  [nested|flat] 440+ messages in thread

* [PATCH v1 2/8] convert ParallelBitmapHeapState->state to an atomic
@ 2026-07-09 18:38 Nathan Bossart <nathan@postgresql.org>
  0 siblings, 0 replies; 440+ messages in thread

From: Nathan Bossart @ 2026-07-09 18:38 UTC (permalink / raw)

---
 src/backend/executor/nodeBitmapHeapscan.c | 21 ++++++---------------
 1 file changed, 6 insertions(+), 15 deletions(-)

diff --git a/src/backend/executor/nodeBitmapHeapscan.c b/src/backend/executor/nodeBitmapHeapscan.c
index 83d6478bc2b..f2bb487bf10 100644
--- a/src/backend/executor/nodeBitmapHeapscan.c
+++ b/src/backend/executor/nodeBitmapHeapscan.c
@@ -79,7 +79,6 @@ typedef enum
 /* ----------------
  *	 ParallelBitmapHeapState information
  *		tbmiterator				iterator for scanning current pages
- *		mutex					mutual exclusion for state
  *		state					current state of the TIDBitmap
  *		cv						conditional wait variable
  * ----------------
@@ -87,8 +86,7 @@ typedef enum
 typedef struct ParallelBitmapHeapState
 {
 	dsa_pointer tbmiterator;
-	slock_t		mutex;
-	SharedBitmapState state;
+	pg_atomic_uint32 state;
 	ConditionVariable cv;
 } ParallelBitmapHeapState;
 
@@ -228,9 +226,7 @@ BitmapHeapNext(BitmapHeapScanState *node)
 static inline void
 BitmapDoneInitializingSharedState(ParallelBitmapHeapState *pstate)
 {
-	SpinLockAcquire(&pstate->mutex);
-	pstate->state = BM_FINISHED;
-	SpinLockRelease(&pstate->mutex);
+	pg_atomic_write_membarrier_u32(&pstate->state, BM_FINISHED);
 	ConditionVariableBroadcast(&pstate->cv);
 }
 
@@ -480,11 +476,8 @@ BitmapShouldInitializeSharedState(ParallelBitmapHeapState *pstate)
 
 	while (1)
 	{
-		SpinLockAcquire(&pstate->mutex);
-		state = pstate->state;
-		if (pstate->state == BM_INITIAL)
-			pstate->state = BM_INPROGRESS;
-		SpinLockRelease(&pstate->mutex);
+		state = BM_INITIAL;
+		pg_atomic_compare_exchange_u32(&pstate->state, &state, BM_INPROGRESS);
 
 		/* Exit if bitmap is done, or if we're the leader. */
 		if (state != BM_INPROGRESS)
@@ -538,9 +531,7 @@ ExecBitmapHeapInitializeDSM(BitmapHeapScanState *node,
 
 	pstate->tbmiterator = 0;
 
-	/* Initialize the mutex */
-	SpinLockInit(&pstate->mutex);
-	pstate->state = BM_INITIAL;
+	pg_atomic_init_u32(&pstate->state, BM_INITIAL);
 
 	ConditionVariableInit(&pstate->cv);
 
@@ -565,7 +556,7 @@ ExecBitmapHeapReInitializeDSM(BitmapHeapScanState *node,
 	if (dsa == NULL)
 		return;
 
-	pstate->state = BM_INITIAL;
+	pg_atomic_write_u32(&pstate->state, BM_INITIAL);
 
 	if (DsaPointerIsValid(pstate->tbmiterator))
 		tbm_free_shared_area(dsa, pstate->tbmiterator);
-- 
2.50.1 (Apple Git-155)


--Ot5x3ffkWEuxilWO
Content-Type: text/plain; charset=us-ascii
Content-Disposition: attachment;
	filename=v1-0003-convert-FixedParallelState-last_xlog_end-to-an-at.patch



^ permalink  raw  reply  [nested|flat] 440+ messages in thread

* [PATCH v1 2/8] convert ParallelBitmapHeapState->state to an atomic
@ 2026-07-09 18:38 Nathan Bossart <nathan@postgresql.org>
  0 siblings, 0 replies; 440+ messages in thread

From: Nathan Bossart @ 2026-07-09 18:38 UTC (permalink / raw)

---
 src/backend/executor/nodeBitmapHeapscan.c | 21 ++++++---------------
 1 file changed, 6 insertions(+), 15 deletions(-)

diff --git a/src/backend/executor/nodeBitmapHeapscan.c b/src/backend/executor/nodeBitmapHeapscan.c
index 83d6478bc2b..f2bb487bf10 100644
--- a/src/backend/executor/nodeBitmapHeapscan.c
+++ b/src/backend/executor/nodeBitmapHeapscan.c
@@ -79,7 +79,6 @@ typedef enum
 /* ----------------
  *	 ParallelBitmapHeapState information
  *		tbmiterator				iterator for scanning current pages
- *		mutex					mutual exclusion for state
  *		state					current state of the TIDBitmap
  *		cv						conditional wait variable
  * ----------------
@@ -87,8 +86,7 @@ typedef enum
 typedef struct ParallelBitmapHeapState
 {
 	dsa_pointer tbmiterator;
-	slock_t		mutex;
-	SharedBitmapState state;
+	pg_atomic_uint32 state;
 	ConditionVariable cv;
 } ParallelBitmapHeapState;
 
@@ -228,9 +226,7 @@ BitmapHeapNext(BitmapHeapScanState *node)
 static inline void
 BitmapDoneInitializingSharedState(ParallelBitmapHeapState *pstate)
 {
-	SpinLockAcquire(&pstate->mutex);
-	pstate->state = BM_FINISHED;
-	SpinLockRelease(&pstate->mutex);
+	pg_atomic_write_membarrier_u32(&pstate->state, BM_FINISHED);
 	ConditionVariableBroadcast(&pstate->cv);
 }
 
@@ -480,11 +476,8 @@ BitmapShouldInitializeSharedState(ParallelBitmapHeapState *pstate)
 
 	while (1)
 	{
-		SpinLockAcquire(&pstate->mutex);
-		state = pstate->state;
-		if (pstate->state == BM_INITIAL)
-			pstate->state = BM_INPROGRESS;
-		SpinLockRelease(&pstate->mutex);
+		state = BM_INITIAL;
+		pg_atomic_compare_exchange_u32(&pstate->state, &state, BM_INPROGRESS);
 
 		/* Exit if bitmap is done, or if we're the leader. */
 		if (state != BM_INPROGRESS)
@@ -538,9 +531,7 @@ ExecBitmapHeapInitializeDSM(BitmapHeapScanState *node,
 
 	pstate->tbmiterator = 0;
 
-	/* Initialize the mutex */
-	SpinLockInit(&pstate->mutex);
-	pstate->state = BM_INITIAL;
+	pg_atomic_init_u32(&pstate->state, BM_INITIAL);
 
 	ConditionVariableInit(&pstate->cv);
 
@@ -565,7 +556,7 @@ ExecBitmapHeapReInitializeDSM(BitmapHeapScanState *node,
 	if (dsa == NULL)
 		return;
 
-	pstate->state = BM_INITIAL;
+	pg_atomic_write_u32(&pstate->state, BM_INITIAL);
 
 	if (DsaPointerIsValid(pstate->tbmiterator))
 		tbm_free_shared_area(dsa, pstate->tbmiterator);
-- 
2.50.1 (Apple Git-155)


--Ot5x3ffkWEuxilWO
Content-Type: text/plain; charset=us-ascii
Content-Disposition: attachment;
	filename=v1-0003-convert-FixedParallelState-last_xlog_end-to-an-at.patch



^ permalink  raw  reply  [nested|flat] 440+ messages in thread

* [PATCH v1 2/8] convert ParallelBitmapHeapState->state to an atomic
@ 2026-07-09 18:38 Nathan Bossart <nathan@postgresql.org>
  0 siblings, 0 replies; 440+ messages in thread

From: Nathan Bossart @ 2026-07-09 18:38 UTC (permalink / raw)

---
 src/backend/executor/nodeBitmapHeapscan.c | 21 ++++++---------------
 1 file changed, 6 insertions(+), 15 deletions(-)

diff --git a/src/backend/executor/nodeBitmapHeapscan.c b/src/backend/executor/nodeBitmapHeapscan.c
index 83d6478bc2b..f2bb487bf10 100644
--- a/src/backend/executor/nodeBitmapHeapscan.c
+++ b/src/backend/executor/nodeBitmapHeapscan.c
@@ -79,7 +79,6 @@ typedef enum
 /* ----------------
  *	 ParallelBitmapHeapState information
  *		tbmiterator				iterator for scanning current pages
- *		mutex					mutual exclusion for state
  *		state					current state of the TIDBitmap
  *		cv						conditional wait variable
  * ----------------
@@ -87,8 +86,7 @@ typedef enum
 typedef struct ParallelBitmapHeapState
 {
 	dsa_pointer tbmiterator;
-	slock_t		mutex;
-	SharedBitmapState state;
+	pg_atomic_uint32 state;
 	ConditionVariable cv;
 } ParallelBitmapHeapState;
 
@@ -228,9 +226,7 @@ BitmapHeapNext(BitmapHeapScanState *node)
 static inline void
 BitmapDoneInitializingSharedState(ParallelBitmapHeapState *pstate)
 {
-	SpinLockAcquire(&pstate->mutex);
-	pstate->state = BM_FINISHED;
-	SpinLockRelease(&pstate->mutex);
+	pg_atomic_write_membarrier_u32(&pstate->state, BM_FINISHED);
 	ConditionVariableBroadcast(&pstate->cv);
 }
 
@@ -480,11 +476,8 @@ BitmapShouldInitializeSharedState(ParallelBitmapHeapState *pstate)
 
 	while (1)
 	{
-		SpinLockAcquire(&pstate->mutex);
-		state = pstate->state;
-		if (pstate->state == BM_INITIAL)
-			pstate->state = BM_INPROGRESS;
-		SpinLockRelease(&pstate->mutex);
+		state = BM_INITIAL;
+		pg_atomic_compare_exchange_u32(&pstate->state, &state, BM_INPROGRESS);
 
 		/* Exit if bitmap is done, or if we're the leader. */
 		if (state != BM_INPROGRESS)
@@ -538,9 +531,7 @@ ExecBitmapHeapInitializeDSM(BitmapHeapScanState *node,
 
 	pstate->tbmiterator = 0;
 
-	/* Initialize the mutex */
-	SpinLockInit(&pstate->mutex);
-	pstate->state = BM_INITIAL;
+	pg_atomic_init_u32(&pstate->state, BM_INITIAL);
 
 	ConditionVariableInit(&pstate->cv);
 
@@ -565,7 +556,7 @@ ExecBitmapHeapReInitializeDSM(BitmapHeapScanState *node,
 	if (dsa == NULL)
 		return;
 
-	pstate->state = BM_INITIAL;
+	pg_atomic_write_u32(&pstate->state, BM_INITIAL);
 
 	if (DsaPointerIsValid(pstate->tbmiterator))
 		tbm_free_shared_area(dsa, pstate->tbmiterator);
-- 
2.50.1 (Apple Git-155)


--Ot5x3ffkWEuxilWO
Content-Type: text/plain; charset=us-ascii
Content-Disposition: attachment;
	filename=v1-0003-convert-FixedParallelState-last_xlog_end-to-an-at.patch



^ permalink  raw  reply  [nested|flat] 440+ messages in thread

* [PATCH v1 2/8] convert ParallelBitmapHeapState->state to an atomic
@ 2026-07-09 18:38 Nathan Bossart <nathan@postgresql.org>
  0 siblings, 0 replies; 440+ messages in thread

From: Nathan Bossart @ 2026-07-09 18:38 UTC (permalink / raw)

---
 src/backend/executor/nodeBitmapHeapscan.c | 21 ++++++---------------
 1 file changed, 6 insertions(+), 15 deletions(-)

diff --git a/src/backend/executor/nodeBitmapHeapscan.c b/src/backend/executor/nodeBitmapHeapscan.c
index 83d6478bc2b..f2bb487bf10 100644
--- a/src/backend/executor/nodeBitmapHeapscan.c
+++ b/src/backend/executor/nodeBitmapHeapscan.c
@@ -79,7 +79,6 @@ typedef enum
 /* ----------------
  *	 ParallelBitmapHeapState information
  *		tbmiterator				iterator for scanning current pages
- *		mutex					mutual exclusion for state
  *		state					current state of the TIDBitmap
  *		cv						conditional wait variable
  * ----------------
@@ -87,8 +86,7 @@ typedef enum
 typedef struct ParallelBitmapHeapState
 {
 	dsa_pointer tbmiterator;
-	slock_t		mutex;
-	SharedBitmapState state;
+	pg_atomic_uint32 state;
 	ConditionVariable cv;
 } ParallelBitmapHeapState;
 
@@ -228,9 +226,7 @@ BitmapHeapNext(BitmapHeapScanState *node)
 static inline void
 BitmapDoneInitializingSharedState(ParallelBitmapHeapState *pstate)
 {
-	SpinLockAcquire(&pstate->mutex);
-	pstate->state = BM_FINISHED;
-	SpinLockRelease(&pstate->mutex);
+	pg_atomic_write_membarrier_u32(&pstate->state, BM_FINISHED);
 	ConditionVariableBroadcast(&pstate->cv);
 }
 
@@ -480,11 +476,8 @@ BitmapShouldInitializeSharedState(ParallelBitmapHeapState *pstate)
 
 	while (1)
 	{
-		SpinLockAcquire(&pstate->mutex);
-		state = pstate->state;
-		if (pstate->state == BM_INITIAL)
-			pstate->state = BM_INPROGRESS;
-		SpinLockRelease(&pstate->mutex);
+		state = BM_INITIAL;
+		pg_atomic_compare_exchange_u32(&pstate->state, &state, BM_INPROGRESS);
 
 		/* Exit if bitmap is done, or if we're the leader. */
 		if (state != BM_INPROGRESS)
@@ -538,9 +531,7 @@ ExecBitmapHeapInitializeDSM(BitmapHeapScanState *node,
 
 	pstate->tbmiterator = 0;
 
-	/* Initialize the mutex */
-	SpinLockInit(&pstate->mutex);
-	pstate->state = BM_INITIAL;
+	pg_atomic_init_u32(&pstate->state, BM_INITIAL);
 
 	ConditionVariableInit(&pstate->cv);
 
@@ -565,7 +556,7 @@ ExecBitmapHeapReInitializeDSM(BitmapHeapScanState *node,
 	if (dsa == NULL)
 		return;
 
-	pstate->state = BM_INITIAL;
+	pg_atomic_write_u32(&pstate->state, BM_INITIAL);
 
 	if (DsaPointerIsValid(pstate->tbmiterator))
 		tbm_free_shared_area(dsa, pstate->tbmiterator);
-- 
2.50.1 (Apple Git-155)


--Ot5x3ffkWEuxilWO
Content-Type: text/plain; charset=us-ascii
Content-Disposition: attachment;
	filename=v1-0003-convert-FixedParallelState-last_xlog_end-to-an-at.patch



^ permalink  raw  reply  [nested|flat] 440+ messages in thread

* [PATCH v1 2/8] convert ParallelBitmapHeapState->state to an atomic
@ 2026-07-09 18:38 Nathan Bossart <nathan@postgresql.org>
  0 siblings, 0 replies; 440+ messages in thread

From: Nathan Bossart @ 2026-07-09 18:38 UTC (permalink / raw)

---
 src/backend/executor/nodeBitmapHeapscan.c | 21 ++++++---------------
 1 file changed, 6 insertions(+), 15 deletions(-)

diff --git a/src/backend/executor/nodeBitmapHeapscan.c b/src/backend/executor/nodeBitmapHeapscan.c
index 83d6478bc2b..f2bb487bf10 100644
--- a/src/backend/executor/nodeBitmapHeapscan.c
+++ b/src/backend/executor/nodeBitmapHeapscan.c
@@ -79,7 +79,6 @@ typedef enum
 /* ----------------
  *	 ParallelBitmapHeapState information
  *		tbmiterator				iterator for scanning current pages
- *		mutex					mutual exclusion for state
  *		state					current state of the TIDBitmap
  *		cv						conditional wait variable
  * ----------------
@@ -87,8 +86,7 @@ typedef enum
 typedef struct ParallelBitmapHeapState
 {
 	dsa_pointer tbmiterator;
-	slock_t		mutex;
-	SharedBitmapState state;
+	pg_atomic_uint32 state;
 	ConditionVariable cv;
 } ParallelBitmapHeapState;
 
@@ -228,9 +226,7 @@ BitmapHeapNext(BitmapHeapScanState *node)
 static inline void
 BitmapDoneInitializingSharedState(ParallelBitmapHeapState *pstate)
 {
-	SpinLockAcquire(&pstate->mutex);
-	pstate->state = BM_FINISHED;
-	SpinLockRelease(&pstate->mutex);
+	pg_atomic_write_membarrier_u32(&pstate->state, BM_FINISHED);
 	ConditionVariableBroadcast(&pstate->cv);
 }
 
@@ -480,11 +476,8 @@ BitmapShouldInitializeSharedState(ParallelBitmapHeapState *pstate)
 
 	while (1)
 	{
-		SpinLockAcquire(&pstate->mutex);
-		state = pstate->state;
-		if (pstate->state == BM_INITIAL)
-			pstate->state = BM_INPROGRESS;
-		SpinLockRelease(&pstate->mutex);
+		state = BM_INITIAL;
+		pg_atomic_compare_exchange_u32(&pstate->state, &state, BM_INPROGRESS);
 
 		/* Exit if bitmap is done, or if we're the leader. */
 		if (state != BM_INPROGRESS)
@@ -538,9 +531,7 @@ ExecBitmapHeapInitializeDSM(BitmapHeapScanState *node,
 
 	pstate->tbmiterator = 0;
 
-	/* Initialize the mutex */
-	SpinLockInit(&pstate->mutex);
-	pstate->state = BM_INITIAL;
+	pg_atomic_init_u32(&pstate->state, BM_INITIAL);
 
 	ConditionVariableInit(&pstate->cv);
 
@@ -565,7 +556,7 @@ ExecBitmapHeapReInitializeDSM(BitmapHeapScanState *node,
 	if (dsa == NULL)
 		return;
 
-	pstate->state = BM_INITIAL;
+	pg_atomic_write_u32(&pstate->state, BM_INITIAL);
 
 	if (DsaPointerIsValid(pstate->tbmiterator))
 		tbm_free_shared_area(dsa, pstate->tbmiterator);
-- 
2.50.1 (Apple Git-155)


--Ot5x3ffkWEuxilWO
Content-Type: text/plain; charset=us-ascii
Content-Disposition: attachment;
	filename=v1-0003-convert-FixedParallelState-last_xlog_end-to-an-at.patch



^ permalink  raw  reply  [nested|flat] 440+ messages in thread

* [PATCH v1 2/8] convert ParallelBitmapHeapState->state to an atomic
@ 2026-07-09 18:38 Nathan Bossart <nathan@postgresql.org>
  0 siblings, 0 replies; 440+ messages in thread

From: Nathan Bossart @ 2026-07-09 18:38 UTC (permalink / raw)

---
 src/backend/executor/nodeBitmapHeapscan.c | 21 ++++++---------------
 1 file changed, 6 insertions(+), 15 deletions(-)

diff --git a/src/backend/executor/nodeBitmapHeapscan.c b/src/backend/executor/nodeBitmapHeapscan.c
index 83d6478bc2b..f2bb487bf10 100644
--- a/src/backend/executor/nodeBitmapHeapscan.c
+++ b/src/backend/executor/nodeBitmapHeapscan.c
@@ -79,7 +79,6 @@ typedef enum
 /* ----------------
  *	 ParallelBitmapHeapState information
  *		tbmiterator				iterator for scanning current pages
- *		mutex					mutual exclusion for state
  *		state					current state of the TIDBitmap
  *		cv						conditional wait variable
  * ----------------
@@ -87,8 +86,7 @@ typedef enum
 typedef struct ParallelBitmapHeapState
 {
 	dsa_pointer tbmiterator;
-	slock_t		mutex;
-	SharedBitmapState state;
+	pg_atomic_uint32 state;
 	ConditionVariable cv;
 } ParallelBitmapHeapState;
 
@@ -228,9 +226,7 @@ BitmapHeapNext(BitmapHeapScanState *node)
 static inline void
 BitmapDoneInitializingSharedState(ParallelBitmapHeapState *pstate)
 {
-	SpinLockAcquire(&pstate->mutex);
-	pstate->state = BM_FINISHED;
-	SpinLockRelease(&pstate->mutex);
+	pg_atomic_write_membarrier_u32(&pstate->state, BM_FINISHED);
 	ConditionVariableBroadcast(&pstate->cv);
 }
 
@@ -480,11 +476,8 @@ BitmapShouldInitializeSharedState(ParallelBitmapHeapState *pstate)
 
 	while (1)
 	{
-		SpinLockAcquire(&pstate->mutex);
-		state = pstate->state;
-		if (pstate->state == BM_INITIAL)
-			pstate->state = BM_INPROGRESS;
-		SpinLockRelease(&pstate->mutex);
+		state = BM_INITIAL;
+		pg_atomic_compare_exchange_u32(&pstate->state, &state, BM_INPROGRESS);
 
 		/* Exit if bitmap is done, or if we're the leader. */
 		if (state != BM_INPROGRESS)
@@ -538,9 +531,7 @@ ExecBitmapHeapInitializeDSM(BitmapHeapScanState *node,
 
 	pstate->tbmiterator = 0;
 
-	/* Initialize the mutex */
-	SpinLockInit(&pstate->mutex);
-	pstate->state = BM_INITIAL;
+	pg_atomic_init_u32(&pstate->state, BM_INITIAL);
 
 	ConditionVariableInit(&pstate->cv);
 
@@ -565,7 +556,7 @@ ExecBitmapHeapReInitializeDSM(BitmapHeapScanState *node,
 	if (dsa == NULL)
 		return;
 
-	pstate->state = BM_INITIAL;
+	pg_atomic_write_u32(&pstate->state, BM_INITIAL);
 
 	if (DsaPointerIsValid(pstate->tbmiterator))
 		tbm_free_shared_area(dsa, pstate->tbmiterator);
-- 
2.50.1 (Apple Git-155)


--Ot5x3ffkWEuxilWO
Content-Type: text/plain; charset=us-ascii
Content-Disposition: attachment;
	filename=v1-0003-convert-FixedParallelState-last_xlog_end-to-an-at.patch



^ permalink  raw  reply  [nested|flat] 440+ messages in thread

* [PATCH v1 2/8] convert ParallelBitmapHeapState->state to an atomic
@ 2026-07-09 18:38 Nathan Bossart <nathan@postgresql.org>
  0 siblings, 0 replies; 440+ messages in thread

From: Nathan Bossart @ 2026-07-09 18:38 UTC (permalink / raw)

---
 src/backend/executor/nodeBitmapHeapscan.c | 21 ++++++---------------
 1 file changed, 6 insertions(+), 15 deletions(-)

diff --git a/src/backend/executor/nodeBitmapHeapscan.c b/src/backend/executor/nodeBitmapHeapscan.c
index 83d6478bc2b..f2bb487bf10 100644
--- a/src/backend/executor/nodeBitmapHeapscan.c
+++ b/src/backend/executor/nodeBitmapHeapscan.c
@@ -79,7 +79,6 @@ typedef enum
 /* ----------------
  *	 ParallelBitmapHeapState information
  *		tbmiterator				iterator for scanning current pages
- *		mutex					mutual exclusion for state
  *		state					current state of the TIDBitmap
  *		cv						conditional wait variable
  * ----------------
@@ -87,8 +86,7 @@ typedef enum
 typedef struct ParallelBitmapHeapState
 {
 	dsa_pointer tbmiterator;
-	slock_t		mutex;
-	SharedBitmapState state;
+	pg_atomic_uint32 state;
 	ConditionVariable cv;
 } ParallelBitmapHeapState;
 
@@ -228,9 +226,7 @@ BitmapHeapNext(BitmapHeapScanState *node)
 static inline void
 BitmapDoneInitializingSharedState(ParallelBitmapHeapState *pstate)
 {
-	SpinLockAcquire(&pstate->mutex);
-	pstate->state = BM_FINISHED;
-	SpinLockRelease(&pstate->mutex);
+	pg_atomic_write_membarrier_u32(&pstate->state, BM_FINISHED);
 	ConditionVariableBroadcast(&pstate->cv);
 }
 
@@ -480,11 +476,8 @@ BitmapShouldInitializeSharedState(ParallelBitmapHeapState *pstate)
 
 	while (1)
 	{
-		SpinLockAcquire(&pstate->mutex);
-		state = pstate->state;
-		if (pstate->state == BM_INITIAL)
-			pstate->state = BM_INPROGRESS;
-		SpinLockRelease(&pstate->mutex);
+		state = BM_INITIAL;
+		pg_atomic_compare_exchange_u32(&pstate->state, &state, BM_INPROGRESS);
 
 		/* Exit if bitmap is done, or if we're the leader. */
 		if (state != BM_INPROGRESS)
@@ -538,9 +531,7 @@ ExecBitmapHeapInitializeDSM(BitmapHeapScanState *node,
 
 	pstate->tbmiterator = 0;
 
-	/* Initialize the mutex */
-	SpinLockInit(&pstate->mutex);
-	pstate->state = BM_INITIAL;
+	pg_atomic_init_u32(&pstate->state, BM_INITIAL);
 
 	ConditionVariableInit(&pstate->cv);
 
@@ -565,7 +556,7 @@ ExecBitmapHeapReInitializeDSM(BitmapHeapScanState *node,
 	if (dsa == NULL)
 		return;
 
-	pstate->state = BM_INITIAL;
+	pg_atomic_write_u32(&pstate->state, BM_INITIAL);
 
 	if (DsaPointerIsValid(pstate->tbmiterator))
 		tbm_free_shared_area(dsa, pstate->tbmiterator);
-- 
2.50.1 (Apple Git-155)


--Ot5x3ffkWEuxilWO
Content-Type: text/plain; charset=us-ascii
Content-Disposition: attachment;
	filename=v1-0003-convert-FixedParallelState-last_xlog_end-to-an-at.patch



^ permalink  raw  reply  [nested|flat] 440+ messages in thread

* [PATCH v1 2/8] convert ParallelBitmapHeapState->state to an atomic
@ 2026-07-09 18:38 Nathan Bossart <nathan@postgresql.org>
  0 siblings, 0 replies; 440+ messages in thread

From: Nathan Bossart @ 2026-07-09 18:38 UTC (permalink / raw)

---
 src/backend/executor/nodeBitmapHeapscan.c | 21 ++++++---------------
 1 file changed, 6 insertions(+), 15 deletions(-)

diff --git a/src/backend/executor/nodeBitmapHeapscan.c b/src/backend/executor/nodeBitmapHeapscan.c
index 83d6478bc2b..f2bb487bf10 100644
--- a/src/backend/executor/nodeBitmapHeapscan.c
+++ b/src/backend/executor/nodeBitmapHeapscan.c
@@ -79,7 +79,6 @@ typedef enum
 /* ----------------
  *	 ParallelBitmapHeapState information
  *		tbmiterator				iterator for scanning current pages
- *		mutex					mutual exclusion for state
  *		state					current state of the TIDBitmap
  *		cv						conditional wait variable
  * ----------------
@@ -87,8 +86,7 @@ typedef enum
 typedef struct ParallelBitmapHeapState
 {
 	dsa_pointer tbmiterator;
-	slock_t		mutex;
-	SharedBitmapState state;
+	pg_atomic_uint32 state;
 	ConditionVariable cv;
 } ParallelBitmapHeapState;
 
@@ -228,9 +226,7 @@ BitmapHeapNext(BitmapHeapScanState *node)
 static inline void
 BitmapDoneInitializingSharedState(ParallelBitmapHeapState *pstate)
 {
-	SpinLockAcquire(&pstate->mutex);
-	pstate->state = BM_FINISHED;
-	SpinLockRelease(&pstate->mutex);
+	pg_atomic_write_membarrier_u32(&pstate->state, BM_FINISHED);
 	ConditionVariableBroadcast(&pstate->cv);
 }
 
@@ -480,11 +476,8 @@ BitmapShouldInitializeSharedState(ParallelBitmapHeapState *pstate)
 
 	while (1)
 	{
-		SpinLockAcquire(&pstate->mutex);
-		state = pstate->state;
-		if (pstate->state == BM_INITIAL)
-			pstate->state = BM_INPROGRESS;
-		SpinLockRelease(&pstate->mutex);
+		state = BM_INITIAL;
+		pg_atomic_compare_exchange_u32(&pstate->state, &state, BM_INPROGRESS);
 
 		/* Exit if bitmap is done, or if we're the leader. */
 		if (state != BM_INPROGRESS)
@@ -538,9 +531,7 @@ ExecBitmapHeapInitializeDSM(BitmapHeapScanState *node,
 
 	pstate->tbmiterator = 0;
 
-	/* Initialize the mutex */
-	SpinLockInit(&pstate->mutex);
-	pstate->state = BM_INITIAL;
+	pg_atomic_init_u32(&pstate->state, BM_INITIAL);
 
 	ConditionVariableInit(&pstate->cv);
 
@@ -565,7 +556,7 @@ ExecBitmapHeapReInitializeDSM(BitmapHeapScanState *node,
 	if (dsa == NULL)
 		return;
 
-	pstate->state = BM_INITIAL;
+	pg_atomic_write_u32(&pstate->state, BM_INITIAL);
 
 	if (DsaPointerIsValid(pstate->tbmiterator))
 		tbm_free_shared_area(dsa, pstate->tbmiterator);
-- 
2.50.1 (Apple Git-155)


--Ot5x3ffkWEuxilWO
Content-Type: text/plain; charset=us-ascii
Content-Disposition: attachment;
	filename=v1-0003-convert-FixedParallelState-last_xlog_end-to-an-at.patch



^ permalink  raw  reply  [nested|flat] 440+ messages in thread

* [PATCH v1 2/8] convert ParallelBitmapHeapState->state to an atomic
@ 2026-07-09 18:38 Nathan Bossart <nathan@postgresql.org>
  0 siblings, 0 replies; 440+ messages in thread

From: Nathan Bossart @ 2026-07-09 18:38 UTC (permalink / raw)

---
 src/backend/executor/nodeBitmapHeapscan.c | 21 ++++++---------------
 1 file changed, 6 insertions(+), 15 deletions(-)

diff --git a/src/backend/executor/nodeBitmapHeapscan.c b/src/backend/executor/nodeBitmapHeapscan.c
index 83d6478bc2b..f2bb487bf10 100644
--- a/src/backend/executor/nodeBitmapHeapscan.c
+++ b/src/backend/executor/nodeBitmapHeapscan.c
@@ -79,7 +79,6 @@ typedef enum
 /* ----------------
  *	 ParallelBitmapHeapState information
  *		tbmiterator				iterator for scanning current pages
- *		mutex					mutual exclusion for state
  *		state					current state of the TIDBitmap
  *		cv						conditional wait variable
  * ----------------
@@ -87,8 +86,7 @@ typedef enum
 typedef struct ParallelBitmapHeapState
 {
 	dsa_pointer tbmiterator;
-	slock_t		mutex;
-	SharedBitmapState state;
+	pg_atomic_uint32 state;
 	ConditionVariable cv;
 } ParallelBitmapHeapState;
 
@@ -228,9 +226,7 @@ BitmapHeapNext(BitmapHeapScanState *node)
 static inline void
 BitmapDoneInitializingSharedState(ParallelBitmapHeapState *pstate)
 {
-	SpinLockAcquire(&pstate->mutex);
-	pstate->state = BM_FINISHED;
-	SpinLockRelease(&pstate->mutex);
+	pg_atomic_write_membarrier_u32(&pstate->state, BM_FINISHED);
 	ConditionVariableBroadcast(&pstate->cv);
 }
 
@@ -480,11 +476,8 @@ BitmapShouldInitializeSharedState(ParallelBitmapHeapState *pstate)
 
 	while (1)
 	{
-		SpinLockAcquire(&pstate->mutex);
-		state = pstate->state;
-		if (pstate->state == BM_INITIAL)
-			pstate->state = BM_INPROGRESS;
-		SpinLockRelease(&pstate->mutex);
+		state = BM_INITIAL;
+		pg_atomic_compare_exchange_u32(&pstate->state, &state, BM_INPROGRESS);
 
 		/* Exit if bitmap is done, or if we're the leader. */
 		if (state != BM_INPROGRESS)
@@ -538,9 +531,7 @@ ExecBitmapHeapInitializeDSM(BitmapHeapScanState *node,
 
 	pstate->tbmiterator = 0;
 
-	/* Initialize the mutex */
-	SpinLockInit(&pstate->mutex);
-	pstate->state = BM_INITIAL;
+	pg_atomic_init_u32(&pstate->state, BM_INITIAL);
 
 	ConditionVariableInit(&pstate->cv);
 
@@ -565,7 +556,7 @@ ExecBitmapHeapReInitializeDSM(BitmapHeapScanState *node,
 	if (dsa == NULL)
 		return;
 
-	pstate->state = BM_INITIAL;
+	pg_atomic_write_u32(&pstate->state, BM_INITIAL);
 
 	if (DsaPointerIsValid(pstate->tbmiterator))
 		tbm_free_shared_area(dsa, pstate->tbmiterator);
-- 
2.50.1 (Apple Git-155)


--Ot5x3ffkWEuxilWO
Content-Type: text/plain; charset=us-ascii
Content-Disposition: attachment;
	filename=v1-0003-convert-FixedParallelState-last_xlog_end-to-an-at.patch



^ permalink  raw  reply  [nested|flat] 440+ messages in thread

* [PATCH v1 2/8] convert ParallelBitmapHeapState->state to an atomic
@ 2026-07-09 18:38 Nathan Bossart <nathan@postgresql.org>
  0 siblings, 0 replies; 440+ messages in thread

From: Nathan Bossart @ 2026-07-09 18:38 UTC (permalink / raw)

---
 src/backend/executor/nodeBitmapHeapscan.c | 21 ++++++---------------
 1 file changed, 6 insertions(+), 15 deletions(-)

diff --git a/src/backend/executor/nodeBitmapHeapscan.c b/src/backend/executor/nodeBitmapHeapscan.c
index 83d6478bc2b..f2bb487bf10 100644
--- a/src/backend/executor/nodeBitmapHeapscan.c
+++ b/src/backend/executor/nodeBitmapHeapscan.c
@@ -79,7 +79,6 @@ typedef enum
 /* ----------------
  *	 ParallelBitmapHeapState information
  *		tbmiterator				iterator for scanning current pages
- *		mutex					mutual exclusion for state
  *		state					current state of the TIDBitmap
  *		cv						conditional wait variable
  * ----------------
@@ -87,8 +86,7 @@ typedef enum
 typedef struct ParallelBitmapHeapState
 {
 	dsa_pointer tbmiterator;
-	slock_t		mutex;
-	SharedBitmapState state;
+	pg_atomic_uint32 state;
 	ConditionVariable cv;
 } ParallelBitmapHeapState;
 
@@ -228,9 +226,7 @@ BitmapHeapNext(BitmapHeapScanState *node)
 static inline void
 BitmapDoneInitializingSharedState(ParallelBitmapHeapState *pstate)
 {
-	SpinLockAcquire(&pstate->mutex);
-	pstate->state = BM_FINISHED;
-	SpinLockRelease(&pstate->mutex);
+	pg_atomic_write_membarrier_u32(&pstate->state, BM_FINISHED);
 	ConditionVariableBroadcast(&pstate->cv);
 }
 
@@ -480,11 +476,8 @@ BitmapShouldInitializeSharedState(ParallelBitmapHeapState *pstate)
 
 	while (1)
 	{
-		SpinLockAcquire(&pstate->mutex);
-		state = pstate->state;
-		if (pstate->state == BM_INITIAL)
-			pstate->state = BM_INPROGRESS;
-		SpinLockRelease(&pstate->mutex);
+		state = BM_INITIAL;
+		pg_atomic_compare_exchange_u32(&pstate->state, &state, BM_INPROGRESS);
 
 		/* Exit if bitmap is done, or if we're the leader. */
 		if (state != BM_INPROGRESS)
@@ -538,9 +531,7 @@ ExecBitmapHeapInitializeDSM(BitmapHeapScanState *node,
 
 	pstate->tbmiterator = 0;
 
-	/* Initialize the mutex */
-	SpinLockInit(&pstate->mutex);
-	pstate->state = BM_INITIAL;
+	pg_atomic_init_u32(&pstate->state, BM_INITIAL);
 
 	ConditionVariableInit(&pstate->cv);
 
@@ -565,7 +556,7 @@ ExecBitmapHeapReInitializeDSM(BitmapHeapScanState *node,
 	if (dsa == NULL)
 		return;
 
-	pstate->state = BM_INITIAL;
+	pg_atomic_write_u32(&pstate->state, BM_INITIAL);
 
 	if (DsaPointerIsValid(pstate->tbmiterator))
 		tbm_free_shared_area(dsa, pstate->tbmiterator);
-- 
2.50.1 (Apple Git-155)


--Ot5x3ffkWEuxilWO
Content-Type: text/plain; charset=us-ascii
Content-Disposition: attachment;
	filename=v1-0003-convert-FixedParallelState-last_xlog_end-to-an-at.patch



^ permalink  raw  reply  [nested|flat] 440+ messages in thread

* [PATCH v1 2/8] convert ParallelBitmapHeapState->state to an atomic
@ 2026-07-09 18:38 Nathan Bossart <nathan@postgresql.org>
  0 siblings, 0 replies; 440+ messages in thread

From: Nathan Bossart @ 2026-07-09 18:38 UTC (permalink / raw)

---
 src/backend/executor/nodeBitmapHeapscan.c | 21 ++++++---------------
 1 file changed, 6 insertions(+), 15 deletions(-)

diff --git a/src/backend/executor/nodeBitmapHeapscan.c b/src/backend/executor/nodeBitmapHeapscan.c
index 83d6478bc2b..f2bb487bf10 100644
--- a/src/backend/executor/nodeBitmapHeapscan.c
+++ b/src/backend/executor/nodeBitmapHeapscan.c
@@ -79,7 +79,6 @@ typedef enum
 /* ----------------
  *	 ParallelBitmapHeapState information
  *		tbmiterator				iterator for scanning current pages
- *		mutex					mutual exclusion for state
  *		state					current state of the TIDBitmap
  *		cv						conditional wait variable
  * ----------------
@@ -87,8 +86,7 @@ typedef enum
 typedef struct ParallelBitmapHeapState
 {
 	dsa_pointer tbmiterator;
-	slock_t		mutex;
-	SharedBitmapState state;
+	pg_atomic_uint32 state;
 	ConditionVariable cv;
 } ParallelBitmapHeapState;
 
@@ -228,9 +226,7 @@ BitmapHeapNext(BitmapHeapScanState *node)
 static inline void
 BitmapDoneInitializingSharedState(ParallelBitmapHeapState *pstate)
 {
-	SpinLockAcquire(&pstate->mutex);
-	pstate->state = BM_FINISHED;
-	SpinLockRelease(&pstate->mutex);
+	pg_atomic_write_membarrier_u32(&pstate->state, BM_FINISHED);
 	ConditionVariableBroadcast(&pstate->cv);
 }
 
@@ -480,11 +476,8 @@ BitmapShouldInitializeSharedState(ParallelBitmapHeapState *pstate)
 
 	while (1)
 	{
-		SpinLockAcquire(&pstate->mutex);
-		state = pstate->state;
-		if (pstate->state == BM_INITIAL)
-			pstate->state = BM_INPROGRESS;
-		SpinLockRelease(&pstate->mutex);
+		state = BM_INITIAL;
+		pg_atomic_compare_exchange_u32(&pstate->state, &state, BM_INPROGRESS);
 
 		/* Exit if bitmap is done, or if we're the leader. */
 		if (state != BM_INPROGRESS)
@@ -538,9 +531,7 @@ ExecBitmapHeapInitializeDSM(BitmapHeapScanState *node,
 
 	pstate->tbmiterator = 0;
 
-	/* Initialize the mutex */
-	SpinLockInit(&pstate->mutex);
-	pstate->state = BM_INITIAL;
+	pg_atomic_init_u32(&pstate->state, BM_INITIAL);
 
 	ConditionVariableInit(&pstate->cv);
 
@@ -565,7 +556,7 @@ ExecBitmapHeapReInitializeDSM(BitmapHeapScanState *node,
 	if (dsa == NULL)
 		return;
 
-	pstate->state = BM_INITIAL;
+	pg_atomic_write_u32(&pstate->state, BM_INITIAL);
 
 	if (DsaPointerIsValid(pstate->tbmiterator))
 		tbm_free_shared_area(dsa, pstate->tbmiterator);
-- 
2.50.1 (Apple Git-155)


--Ot5x3ffkWEuxilWO
Content-Type: text/plain; charset=us-ascii
Content-Disposition: attachment;
	filename=v1-0003-convert-FixedParallelState-last_xlog_end-to-an-at.patch



^ permalink  raw  reply  [nested|flat] 440+ messages in thread

* [PATCH v1 2/8] convert ParallelBitmapHeapState->state to an atomic
@ 2026-07-09 18:38 Nathan Bossart <nathan@postgresql.org>
  0 siblings, 0 replies; 440+ messages in thread

From: Nathan Bossart @ 2026-07-09 18:38 UTC (permalink / raw)

---
 src/backend/executor/nodeBitmapHeapscan.c | 21 ++++++---------------
 1 file changed, 6 insertions(+), 15 deletions(-)

diff --git a/src/backend/executor/nodeBitmapHeapscan.c b/src/backend/executor/nodeBitmapHeapscan.c
index 83d6478bc2b..f2bb487bf10 100644
--- a/src/backend/executor/nodeBitmapHeapscan.c
+++ b/src/backend/executor/nodeBitmapHeapscan.c
@@ -79,7 +79,6 @@ typedef enum
 /* ----------------
  *	 ParallelBitmapHeapState information
  *		tbmiterator				iterator for scanning current pages
- *		mutex					mutual exclusion for state
  *		state					current state of the TIDBitmap
  *		cv						conditional wait variable
  * ----------------
@@ -87,8 +86,7 @@ typedef enum
 typedef struct ParallelBitmapHeapState
 {
 	dsa_pointer tbmiterator;
-	slock_t		mutex;
-	SharedBitmapState state;
+	pg_atomic_uint32 state;
 	ConditionVariable cv;
 } ParallelBitmapHeapState;
 
@@ -228,9 +226,7 @@ BitmapHeapNext(BitmapHeapScanState *node)
 static inline void
 BitmapDoneInitializingSharedState(ParallelBitmapHeapState *pstate)
 {
-	SpinLockAcquire(&pstate->mutex);
-	pstate->state = BM_FINISHED;
-	SpinLockRelease(&pstate->mutex);
+	pg_atomic_write_membarrier_u32(&pstate->state, BM_FINISHED);
 	ConditionVariableBroadcast(&pstate->cv);
 }
 
@@ -480,11 +476,8 @@ BitmapShouldInitializeSharedState(ParallelBitmapHeapState *pstate)
 
 	while (1)
 	{
-		SpinLockAcquire(&pstate->mutex);
-		state = pstate->state;
-		if (pstate->state == BM_INITIAL)
-			pstate->state = BM_INPROGRESS;
-		SpinLockRelease(&pstate->mutex);
+		state = BM_INITIAL;
+		pg_atomic_compare_exchange_u32(&pstate->state, &state, BM_INPROGRESS);
 
 		/* Exit if bitmap is done, or if we're the leader. */
 		if (state != BM_INPROGRESS)
@@ -538,9 +531,7 @@ ExecBitmapHeapInitializeDSM(BitmapHeapScanState *node,
 
 	pstate->tbmiterator = 0;
 
-	/* Initialize the mutex */
-	SpinLockInit(&pstate->mutex);
-	pstate->state = BM_INITIAL;
+	pg_atomic_init_u32(&pstate->state, BM_INITIAL);
 
 	ConditionVariableInit(&pstate->cv);
 
@@ -565,7 +556,7 @@ ExecBitmapHeapReInitializeDSM(BitmapHeapScanState *node,
 	if (dsa == NULL)
 		return;
 
-	pstate->state = BM_INITIAL;
+	pg_atomic_write_u32(&pstate->state, BM_INITIAL);
 
 	if (DsaPointerIsValid(pstate->tbmiterator))
 		tbm_free_shared_area(dsa, pstate->tbmiterator);
-- 
2.50.1 (Apple Git-155)


--Ot5x3ffkWEuxilWO
Content-Type: text/plain; charset=us-ascii
Content-Disposition: attachment;
	filename=v1-0003-convert-FixedParallelState-last_xlog_end-to-an-at.patch



^ permalink  raw  reply  [nested|flat] 440+ messages in thread

* [PATCH v1 2/8] convert ParallelBitmapHeapState->state to an atomic
@ 2026-07-09 18:38 Nathan Bossart <nathan@postgresql.org>
  0 siblings, 0 replies; 440+ messages in thread

From: Nathan Bossart @ 2026-07-09 18:38 UTC (permalink / raw)

---
 src/backend/executor/nodeBitmapHeapscan.c | 21 ++++++---------------
 1 file changed, 6 insertions(+), 15 deletions(-)

diff --git a/src/backend/executor/nodeBitmapHeapscan.c b/src/backend/executor/nodeBitmapHeapscan.c
index 83d6478bc2b..f2bb487bf10 100644
--- a/src/backend/executor/nodeBitmapHeapscan.c
+++ b/src/backend/executor/nodeBitmapHeapscan.c
@@ -79,7 +79,6 @@ typedef enum
 /* ----------------
  *	 ParallelBitmapHeapState information
  *		tbmiterator				iterator for scanning current pages
- *		mutex					mutual exclusion for state
  *		state					current state of the TIDBitmap
  *		cv						conditional wait variable
  * ----------------
@@ -87,8 +86,7 @@ typedef enum
 typedef struct ParallelBitmapHeapState
 {
 	dsa_pointer tbmiterator;
-	slock_t		mutex;
-	SharedBitmapState state;
+	pg_atomic_uint32 state;
 	ConditionVariable cv;
 } ParallelBitmapHeapState;
 
@@ -228,9 +226,7 @@ BitmapHeapNext(BitmapHeapScanState *node)
 static inline void
 BitmapDoneInitializingSharedState(ParallelBitmapHeapState *pstate)
 {
-	SpinLockAcquire(&pstate->mutex);
-	pstate->state = BM_FINISHED;
-	SpinLockRelease(&pstate->mutex);
+	pg_atomic_write_membarrier_u32(&pstate->state, BM_FINISHED);
 	ConditionVariableBroadcast(&pstate->cv);
 }
 
@@ -480,11 +476,8 @@ BitmapShouldInitializeSharedState(ParallelBitmapHeapState *pstate)
 
 	while (1)
 	{
-		SpinLockAcquire(&pstate->mutex);
-		state = pstate->state;
-		if (pstate->state == BM_INITIAL)
-			pstate->state = BM_INPROGRESS;
-		SpinLockRelease(&pstate->mutex);
+		state = BM_INITIAL;
+		pg_atomic_compare_exchange_u32(&pstate->state, &state, BM_INPROGRESS);
 
 		/* Exit if bitmap is done, or if we're the leader. */
 		if (state != BM_INPROGRESS)
@@ -538,9 +531,7 @@ ExecBitmapHeapInitializeDSM(BitmapHeapScanState *node,
 
 	pstate->tbmiterator = 0;
 
-	/* Initialize the mutex */
-	SpinLockInit(&pstate->mutex);
-	pstate->state = BM_INITIAL;
+	pg_atomic_init_u32(&pstate->state, BM_INITIAL);
 
 	ConditionVariableInit(&pstate->cv);
 
@@ -565,7 +556,7 @@ ExecBitmapHeapReInitializeDSM(BitmapHeapScanState *node,
 	if (dsa == NULL)
 		return;
 
-	pstate->state = BM_INITIAL;
+	pg_atomic_write_u32(&pstate->state, BM_INITIAL);
 
 	if (DsaPointerIsValid(pstate->tbmiterator))
 		tbm_free_shared_area(dsa, pstate->tbmiterator);
-- 
2.50.1 (Apple Git-155)


--Ot5x3ffkWEuxilWO
Content-Type: text/plain; charset=us-ascii
Content-Disposition: attachment;
	filename=v1-0003-convert-FixedParallelState-last_xlog_end-to-an-at.patch



^ permalink  raw  reply  [nested|flat] 440+ messages in thread

* [PATCH v1 2/8] convert ParallelBitmapHeapState->state to an atomic
@ 2026-07-09 18:38 Nathan Bossart <nathan@postgresql.org>
  0 siblings, 0 replies; 440+ messages in thread

From: Nathan Bossart @ 2026-07-09 18:38 UTC (permalink / raw)

---
 src/backend/executor/nodeBitmapHeapscan.c | 21 ++++++---------------
 1 file changed, 6 insertions(+), 15 deletions(-)

diff --git a/src/backend/executor/nodeBitmapHeapscan.c b/src/backend/executor/nodeBitmapHeapscan.c
index 83d6478bc2b..f2bb487bf10 100644
--- a/src/backend/executor/nodeBitmapHeapscan.c
+++ b/src/backend/executor/nodeBitmapHeapscan.c
@@ -79,7 +79,6 @@ typedef enum
 /* ----------------
  *	 ParallelBitmapHeapState information
  *		tbmiterator				iterator for scanning current pages
- *		mutex					mutual exclusion for state
  *		state					current state of the TIDBitmap
  *		cv						conditional wait variable
  * ----------------
@@ -87,8 +86,7 @@ typedef enum
 typedef struct ParallelBitmapHeapState
 {
 	dsa_pointer tbmiterator;
-	slock_t		mutex;
-	SharedBitmapState state;
+	pg_atomic_uint32 state;
 	ConditionVariable cv;
 } ParallelBitmapHeapState;
 
@@ -228,9 +226,7 @@ BitmapHeapNext(BitmapHeapScanState *node)
 static inline void
 BitmapDoneInitializingSharedState(ParallelBitmapHeapState *pstate)
 {
-	SpinLockAcquire(&pstate->mutex);
-	pstate->state = BM_FINISHED;
-	SpinLockRelease(&pstate->mutex);
+	pg_atomic_write_membarrier_u32(&pstate->state, BM_FINISHED);
 	ConditionVariableBroadcast(&pstate->cv);
 }
 
@@ -480,11 +476,8 @@ BitmapShouldInitializeSharedState(ParallelBitmapHeapState *pstate)
 
 	while (1)
 	{
-		SpinLockAcquire(&pstate->mutex);
-		state = pstate->state;
-		if (pstate->state == BM_INITIAL)
-			pstate->state = BM_INPROGRESS;
-		SpinLockRelease(&pstate->mutex);
+		state = BM_INITIAL;
+		pg_atomic_compare_exchange_u32(&pstate->state, &state, BM_INPROGRESS);
 
 		/* Exit if bitmap is done, or if we're the leader. */
 		if (state != BM_INPROGRESS)
@@ -538,9 +531,7 @@ ExecBitmapHeapInitializeDSM(BitmapHeapScanState *node,
 
 	pstate->tbmiterator = 0;
 
-	/* Initialize the mutex */
-	SpinLockInit(&pstate->mutex);
-	pstate->state = BM_INITIAL;
+	pg_atomic_init_u32(&pstate->state, BM_INITIAL);
 
 	ConditionVariableInit(&pstate->cv);
 
@@ -565,7 +556,7 @@ ExecBitmapHeapReInitializeDSM(BitmapHeapScanState *node,
 	if (dsa == NULL)
 		return;
 
-	pstate->state = BM_INITIAL;
+	pg_atomic_write_u32(&pstate->state, BM_INITIAL);
 
 	if (DsaPointerIsValid(pstate->tbmiterator))
 		tbm_free_shared_area(dsa, pstate->tbmiterator);
-- 
2.50.1 (Apple Git-155)


--Ot5x3ffkWEuxilWO
Content-Type: text/plain; charset=us-ascii
Content-Disposition: attachment;
	filename=v1-0003-convert-FixedParallelState-last_xlog_end-to-an-at.patch



^ permalink  raw  reply  [nested|flat] 440+ messages in thread

* [PATCH v1 2/8] convert ParallelBitmapHeapState->state to an atomic
@ 2026-07-09 18:38 Nathan Bossart <nathan@postgresql.org>
  0 siblings, 0 replies; 440+ messages in thread

From: Nathan Bossart @ 2026-07-09 18:38 UTC (permalink / raw)

---
 src/backend/executor/nodeBitmapHeapscan.c | 21 ++++++---------------
 1 file changed, 6 insertions(+), 15 deletions(-)

diff --git a/src/backend/executor/nodeBitmapHeapscan.c b/src/backend/executor/nodeBitmapHeapscan.c
index 83d6478bc2b..f2bb487bf10 100644
--- a/src/backend/executor/nodeBitmapHeapscan.c
+++ b/src/backend/executor/nodeBitmapHeapscan.c
@@ -79,7 +79,6 @@ typedef enum
 /* ----------------
  *	 ParallelBitmapHeapState information
  *		tbmiterator				iterator for scanning current pages
- *		mutex					mutual exclusion for state
  *		state					current state of the TIDBitmap
  *		cv						conditional wait variable
  * ----------------
@@ -87,8 +86,7 @@ typedef enum
 typedef struct ParallelBitmapHeapState
 {
 	dsa_pointer tbmiterator;
-	slock_t		mutex;
-	SharedBitmapState state;
+	pg_atomic_uint32 state;
 	ConditionVariable cv;
 } ParallelBitmapHeapState;
 
@@ -228,9 +226,7 @@ BitmapHeapNext(BitmapHeapScanState *node)
 static inline void
 BitmapDoneInitializingSharedState(ParallelBitmapHeapState *pstate)
 {
-	SpinLockAcquire(&pstate->mutex);
-	pstate->state = BM_FINISHED;
-	SpinLockRelease(&pstate->mutex);
+	pg_atomic_write_membarrier_u32(&pstate->state, BM_FINISHED);
 	ConditionVariableBroadcast(&pstate->cv);
 }
 
@@ -480,11 +476,8 @@ BitmapShouldInitializeSharedState(ParallelBitmapHeapState *pstate)
 
 	while (1)
 	{
-		SpinLockAcquire(&pstate->mutex);
-		state = pstate->state;
-		if (pstate->state == BM_INITIAL)
-			pstate->state = BM_INPROGRESS;
-		SpinLockRelease(&pstate->mutex);
+		state = BM_INITIAL;
+		pg_atomic_compare_exchange_u32(&pstate->state, &state, BM_INPROGRESS);
 
 		/* Exit if bitmap is done, or if we're the leader. */
 		if (state != BM_INPROGRESS)
@@ -538,9 +531,7 @@ ExecBitmapHeapInitializeDSM(BitmapHeapScanState *node,
 
 	pstate->tbmiterator = 0;
 
-	/* Initialize the mutex */
-	SpinLockInit(&pstate->mutex);
-	pstate->state = BM_INITIAL;
+	pg_atomic_init_u32(&pstate->state, BM_INITIAL);
 
 	ConditionVariableInit(&pstate->cv);
 
@@ -565,7 +556,7 @@ ExecBitmapHeapReInitializeDSM(BitmapHeapScanState *node,
 	if (dsa == NULL)
 		return;
 
-	pstate->state = BM_INITIAL;
+	pg_atomic_write_u32(&pstate->state, BM_INITIAL);
 
 	if (DsaPointerIsValid(pstate->tbmiterator))
 		tbm_free_shared_area(dsa, pstate->tbmiterator);
-- 
2.50.1 (Apple Git-155)


--Ot5x3ffkWEuxilWO
Content-Type: text/plain; charset=us-ascii
Content-Disposition: attachment;
	filename=v1-0003-convert-FixedParallelState-last_xlog_end-to-an-at.patch



^ permalink  raw  reply  [nested|flat] 440+ messages in thread

* [PATCH v1 2/8] convert ParallelBitmapHeapState->state to an atomic
@ 2026-07-09 18:38 Nathan Bossart <nathan@postgresql.org>
  0 siblings, 0 replies; 440+ messages in thread

From: Nathan Bossart @ 2026-07-09 18:38 UTC (permalink / raw)

---
 src/backend/executor/nodeBitmapHeapscan.c | 21 ++++++---------------
 1 file changed, 6 insertions(+), 15 deletions(-)

diff --git a/src/backend/executor/nodeBitmapHeapscan.c b/src/backend/executor/nodeBitmapHeapscan.c
index 83d6478bc2b..f2bb487bf10 100644
--- a/src/backend/executor/nodeBitmapHeapscan.c
+++ b/src/backend/executor/nodeBitmapHeapscan.c
@@ -79,7 +79,6 @@ typedef enum
 /* ----------------
  *	 ParallelBitmapHeapState information
  *		tbmiterator				iterator for scanning current pages
- *		mutex					mutual exclusion for state
  *		state					current state of the TIDBitmap
  *		cv						conditional wait variable
  * ----------------
@@ -87,8 +86,7 @@ typedef enum
 typedef struct ParallelBitmapHeapState
 {
 	dsa_pointer tbmiterator;
-	slock_t		mutex;
-	SharedBitmapState state;
+	pg_atomic_uint32 state;
 	ConditionVariable cv;
 } ParallelBitmapHeapState;
 
@@ -228,9 +226,7 @@ BitmapHeapNext(BitmapHeapScanState *node)
 static inline void
 BitmapDoneInitializingSharedState(ParallelBitmapHeapState *pstate)
 {
-	SpinLockAcquire(&pstate->mutex);
-	pstate->state = BM_FINISHED;
-	SpinLockRelease(&pstate->mutex);
+	pg_atomic_write_membarrier_u32(&pstate->state, BM_FINISHED);
 	ConditionVariableBroadcast(&pstate->cv);
 }
 
@@ -480,11 +476,8 @@ BitmapShouldInitializeSharedState(ParallelBitmapHeapState *pstate)
 
 	while (1)
 	{
-		SpinLockAcquire(&pstate->mutex);
-		state = pstate->state;
-		if (pstate->state == BM_INITIAL)
-			pstate->state = BM_INPROGRESS;
-		SpinLockRelease(&pstate->mutex);
+		state = BM_INITIAL;
+		pg_atomic_compare_exchange_u32(&pstate->state, &state, BM_INPROGRESS);
 
 		/* Exit if bitmap is done, or if we're the leader. */
 		if (state != BM_INPROGRESS)
@@ -538,9 +531,7 @@ ExecBitmapHeapInitializeDSM(BitmapHeapScanState *node,
 
 	pstate->tbmiterator = 0;
 
-	/* Initialize the mutex */
-	SpinLockInit(&pstate->mutex);
-	pstate->state = BM_INITIAL;
+	pg_atomic_init_u32(&pstate->state, BM_INITIAL);
 
 	ConditionVariableInit(&pstate->cv);
 
@@ -565,7 +556,7 @@ ExecBitmapHeapReInitializeDSM(BitmapHeapScanState *node,
 	if (dsa == NULL)
 		return;
 
-	pstate->state = BM_INITIAL;
+	pg_atomic_write_u32(&pstate->state, BM_INITIAL);
 
 	if (DsaPointerIsValid(pstate->tbmiterator))
 		tbm_free_shared_area(dsa, pstate->tbmiterator);
-- 
2.50.1 (Apple Git-155)


--Ot5x3ffkWEuxilWO
Content-Type: text/plain; charset=us-ascii
Content-Disposition: attachment;
	filename=v1-0003-convert-FixedParallelState-last_xlog_end-to-an-at.patch



^ permalink  raw  reply  [nested|flat] 440+ messages in thread

* [PATCH v2 2/9] convert ParallelBitmapHeapState->state to an atomic
@ 2026-07-09 18:38 Nathan Bossart <nathan@postgresql.org>
  0 siblings, 0 replies; 440+ messages in thread

From: Nathan Bossart @ 2026-07-09 18:38 UTC (permalink / raw)

---
 src/backend/executor/nodeBitmapHeapscan.c | 23 +++++++----------------
 1 file changed, 7 insertions(+), 16 deletions(-)

diff --git a/src/backend/executor/nodeBitmapHeapscan.c b/src/backend/executor/nodeBitmapHeapscan.c
index 83d6478bc2b..a9e83f30687 100644
--- a/src/backend/executor/nodeBitmapHeapscan.c
+++ b/src/backend/executor/nodeBitmapHeapscan.c
@@ -79,7 +79,6 @@ typedef enum
 /* ----------------
  *	 ParallelBitmapHeapState information
  *		tbmiterator				iterator for scanning current pages
- *		mutex					mutual exclusion for state
  *		state					current state of the TIDBitmap
  *		cv						conditional wait variable
  * ----------------
@@ -87,8 +86,7 @@ typedef enum
 typedef struct ParallelBitmapHeapState
 {
 	dsa_pointer tbmiterator;
-	slock_t		mutex;
-	SharedBitmapState state;
+	pg_atomic_uint32 state;
 	ConditionVariable cv;
 } ParallelBitmapHeapState;
 
@@ -228,9 +226,7 @@ BitmapHeapNext(BitmapHeapScanState *node)
 static inline void
 BitmapDoneInitializingSharedState(ParallelBitmapHeapState *pstate)
 {
-	SpinLockAcquire(&pstate->mutex);
-	pstate->state = BM_FINISHED;
-	SpinLockRelease(&pstate->mutex);
+	pg_atomic_write_membarrier_u32(&pstate->state, BM_FINISHED);
 	ConditionVariableBroadcast(&pstate->cv);
 }
 
@@ -476,15 +472,12 @@ ExecInitBitmapHeapScan(BitmapHeapScan *node, EState *estate, int eflags)
 static bool
 BitmapShouldInitializeSharedState(ParallelBitmapHeapState *pstate)
 {
-	SharedBitmapState state;
+	uint32		state;
 
 	while (1)
 	{
-		SpinLockAcquire(&pstate->mutex);
-		state = pstate->state;
-		if (pstate->state == BM_INITIAL)
-			pstate->state = BM_INPROGRESS;
-		SpinLockRelease(&pstate->mutex);
+		state = BM_INITIAL;
+		pg_atomic_compare_exchange_u32(&pstate->state, &state, BM_INPROGRESS);
 
 		/* Exit if bitmap is done, or if we're the leader. */
 		if (state != BM_INPROGRESS)
@@ -538,9 +531,7 @@ ExecBitmapHeapInitializeDSM(BitmapHeapScanState *node,
 
 	pstate->tbmiterator = 0;
 
-	/* Initialize the mutex */
-	SpinLockInit(&pstate->mutex);
-	pstate->state = BM_INITIAL;
+	pg_atomic_init_u32(&pstate->state, BM_INITIAL);
 
 	ConditionVariableInit(&pstate->cv);
 
@@ -565,7 +556,7 @@ ExecBitmapHeapReInitializeDSM(BitmapHeapScanState *node,
 	if (dsa == NULL)
 		return;
 
-	pstate->state = BM_INITIAL;
+	pg_atomic_write_u32(&pstate->state, BM_INITIAL);
 
 	if (DsaPointerIsValid(pstate->tbmiterator))
 		tbm_free_shared_area(dsa, pstate->tbmiterator);
-- 
2.50.1 (Apple Git-155)


--Xf36GNcW+0xZNily
Content-Type: text/plain; charset=us-ascii
Content-Disposition: attachment;
	filename=v2-0003-convert-FixedParallelState-last_xlog_end-to-an-at.patch



^ permalink  raw  reply  [nested|flat] 440+ messages in thread

* [PATCH v1 2/8] convert ParallelBitmapHeapState->state to an atomic
@ 2026-07-09 18:38 Nathan Bossart <nathan@postgresql.org>
  0 siblings, 0 replies; 440+ messages in thread

From: Nathan Bossart @ 2026-07-09 18:38 UTC (permalink / raw)

---
 src/backend/executor/nodeBitmapHeapscan.c | 21 ++++++---------------
 1 file changed, 6 insertions(+), 15 deletions(-)

diff --git a/src/backend/executor/nodeBitmapHeapscan.c b/src/backend/executor/nodeBitmapHeapscan.c
index 83d6478bc2b..f2bb487bf10 100644
--- a/src/backend/executor/nodeBitmapHeapscan.c
+++ b/src/backend/executor/nodeBitmapHeapscan.c
@@ -79,7 +79,6 @@ typedef enum
 /* ----------------
  *	 ParallelBitmapHeapState information
  *		tbmiterator				iterator for scanning current pages
- *		mutex					mutual exclusion for state
  *		state					current state of the TIDBitmap
  *		cv						conditional wait variable
  * ----------------
@@ -87,8 +86,7 @@ typedef enum
 typedef struct ParallelBitmapHeapState
 {
 	dsa_pointer tbmiterator;
-	slock_t		mutex;
-	SharedBitmapState state;
+	pg_atomic_uint32 state;
 	ConditionVariable cv;
 } ParallelBitmapHeapState;
 
@@ -228,9 +226,7 @@ BitmapHeapNext(BitmapHeapScanState *node)
 static inline void
 BitmapDoneInitializingSharedState(ParallelBitmapHeapState *pstate)
 {
-	SpinLockAcquire(&pstate->mutex);
-	pstate->state = BM_FINISHED;
-	SpinLockRelease(&pstate->mutex);
+	pg_atomic_write_membarrier_u32(&pstate->state, BM_FINISHED);
 	ConditionVariableBroadcast(&pstate->cv);
 }
 
@@ -480,11 +476,8 @@ BitmapShouldInitializeSharedState(ParallelBitmapHeapState *pstate)
 
 	while (1)
 	{
-		SpinLockAcquire(&pstate->mutex);
-		state = pstate->state;
-		if (pstate->state == BM_INITIAL)
-			pstate->state = BM_INPROGRESS;
-		SpinLockRelease(&pstate->mutex);
+		state = BM_INITIAL;
+		pg_atomic_compare_exchange_u32(&pstate->state, &state, BM_INPROGRESS);
 
 		/* Exit if bitmap is done, or if we're the leader. */
 		if (state != BM_INPROGRESS)
@@ -538,9 +531,7 @@ ExecBitmapHeapInitializeDSM(BitmapHeapScanState *node,
 
 	pstate->tbmiterator = 0;
 
-	/* Initialize the mutex */
-	SpinLockInit(&pstate->mutex);
-	pstate->state = BM_INITIAL;
+	pg_atomic_init_u32(&pstate->state, BM_INITIAL);
 
 	ConditionVariableInit(&pstate->cv);
 
@@ -565,7 +556,7 @@ ExecBitmapHeapReInitializeDSM(BitmapHeapScanState *node,
 	if (dsa == NULL)
 		return;
 
-	pstate->state = BM_INITIAL;
+	pg_atomic_write_u32(&pstate->state, BM_INITIAL);
 
 	if (DsaPointerIsValid(pstate->tbmiterator))
 		tbm_free_shared_area(dsa, pstate->tbmiterator);
-- 
2.50.1 (Apple Git-155)


--Ot5x3ffkWEuxilWO
Content-Type: text/plain; charset=us-ascii
Content-Disposition: attachment;
	filename=v1-0003-convert-FixedParallelState-last_xlog_end-to-an-at.patch



^ permalink  raw  reply  [nested|flat] 440+ messages in thread

* [PATCH v1 2/8] convert ParallelBitmapHeapState->state to an atomic
@ 2026-07-09 18:38 Nathan Bossart <nathan@postgresql.org>
  0 siblings, 0 replies; 440+ messages in thread

From: Nathan Bossart @ 2026-07-09 18:38 UTC (permalink / raw)

---
 src/backend/executor/nodeBitmapHeapscan.c | 21 ++++++---------------
 1 file changed, 6 insertions(+), 15 deletions(-)

diff --git a/src/backend/executor/nodeBitmapHeapscan.c b/src/backend/executor/nodeBitmapHeapscan.c
index 83d6478bc2b..f2bb487bf10 100644
--- a/src/backend/executor/nodeBitmapHeapscan.c
+++ b/src/backend/executor/nodeBitmapHeapscan.c
@@ -79,7 +79,6 @@ typedef enum
 /* ----------------
  *	 ParallelBitmapHeapState information
  *		tbmiterator				iterator for scanning current pages
- *		mutex					mutual exclusion for state
  *		state					current state of the TIDBitmap
  *		cv						conditional wait variable
  * ----------------
@@ -87,8 +86,7 @@ typedef enum
 typedef struct ParallelBitmapHeapState
 {
 	dsa_pointer tbmiterator;
-	slock_t		mutex;
-	SharedBitmapState state;
+	pg_atomic_uint32 state;
 	ConditionVariable cv;
 } ParallelBitmapHeapState;
 
@@ -228,9 +226,7 @@ BitmapHeapNext(BitmapHeapScanState *node)
 static inline void
 BitmapDoneInitializingSharedState(ParallelBitmapHeapState *pstate)
 {
-	SpinLockAcquire(&pstate->mutex);
-	pstate->state = BM_FINISHED;
-	SpinLockRelease(&pstate->mutex);
+	pg_atomic_write_membarrier_u32(&pstate->state, BM_FINISHED);
 	ConditionVariableBroadcast(&pstate->cv);
 }
 
@@ -480,11 +476,8 @@ BitmapShouldInitializeSharedState(ParallelBitmapHeapState *pstate)
 
 	while (1)
 	{
-		SpinLockAcquire(&pstate->mutex);
-		state = pstate->state;
-		if (pstate->state == BM_INITIAL)
-			pstate->state = BM_INPROGRESS;
-		SpinLockRelease(&pstate->mutex);
+		state = BM_INITIAL;
+		pg_atomic_compare_exchange_u32(&pstate->state, &state, BM_INPROGRESS);
 
 		/* Exit if bitmap is done, or if we're the leader. */
 		if (state != BM_INPROGRESS)
@@ -538,9 +531,7 @@ ExecBitmapHeapInitializeDSM(BitmapHeapScanState *node,
 
 	pstate->tbmiterator = 0;
 
-	/* Initialize the mutex */
-	SpinLockInit(&pstate->mutex);
-	pstate->state = BM_INITIAL;
+	pg_atomic_init_u32(&pstate->state, BM_INITIAL);
 
 	ConditionVariableInit(&pstate->cv);
 
@@ -565,7 +556,7 @@ ExecBitmapHeapReInitializeDSM(BitmapHeapScanState *node,
 	if (dsa == NULL)
 		return;
 
-	pstate->state = BM_INITIAL;
+	pg_atomic_write_u32(&pstate->state, BM_INITIAL);
 
 	if (DsaPointerIsValid(pstate->tbmiterator))
 		tbm_free_shared_area(dsa, pstate->tbmiterator);
-- 
2.50.1 (Apple Git-155)


--Ot5x3ffkWEuxilWO
Content-Type: text/plain; charset=us-ascii
Content-Disposition: attachment;
	filename=v1-0003-convert-FixedParallelState-last_xlog_end-to-an-at.patch



^ permalink  raw  reply  [nested|flat] 440+ messages in thread

* [PATCH v1 2/8] convert ParallelBitmapHeapState->state to an atomic
@ 2026-07-09 18:38 Nathan Bossart <nathan@postgresql.org>
  0 siblings, 0 replies; 440+ messages in thread

From: Nathan Bossart @ 2026-07-09 18:38 UTC (permalink / raw)

---
 src/backend/executor/nodeBitmapHeapscan.c | 21 ++++++---------------
 1 file changed, 6 insertions(+), 15 deletions(-)

diff --git a/src/backend/executor/nodeBitmapHeapscan.c b/src/backend/executor/nodeBitmapHeapscan.c
index 83d6478bc2b..f2bb487bf10 100644
--- a/src/backend/executor/nodeBitmapHeapscan.c
+++ b/src/backend/executor/nodeBitmapHeapscan.c
@@ -79,7 +79,6 @@ typedef enum
 /* ----------------
  *	 ParallelBitmapHeapState information
  *		tbmiterator				iterator for scanning current pages
- *		mutex					mutual exclusion for state
  *		state					current state of the TIDBitmap
  *		cv						conditional wait variable
  * ----------------
@@ -87,8 +86,7 @@ typedef enum
 typedef struct ParallelBitmapHeapState
 {
 	dsa_pointer tbmiterator;
-	slock_t		mutex;
-	SharedBitmapState state;
+	pg_atomic_uint32 state;
 	ConditionVariable cv;
 } ParallelBitmapHeapState;
 
@@ -228,9 +226,7 @@ BitmapHeapNext(BitmapHeapScanState *node)
 static inline void
 BitmapDoneInitializingSharedState(ParallelBitmapHeapState *pstate)
 {
-	SpinLockAcquire(&pstate->mutex);
-	pstate->state = BM_FINISHED;
-	SpinLockRelease(&pstate->mutex);
+	pg_atomic_write_membarrier_u32(&pstate->state, BM_FINISHED);
 	ConditionVariableBroadcast(&pstate->cv);
 }
 
@@ -480,11 +476,8 @@ BitmapShouldInitializeSharedState(ParallelBitmapHeapState *pstate)
 
 	while (1)
 	{
-		SpinLockAcquire(&pstate->mutex);
-		state = pstate->state;
-		if (pstate->state == BM_INITIAL)
-			pstate->state = BM_INPROGRESS;
-		SpinLockRelease(&pstate->mutex);
+		state = BM_INITIAL;
+		pg_atomic_compare_exchange_u32(&pstate->state, &state, BM_INPROGRESS);
 
 		/* Exit if bitmap is done, or if we're the leader. */
 		if (state != BM_INPROGRESS)
@@ -538,9 +531,7 @@ ExecBitmapHeapInitializeDSM(BitmapHeapScanState *node,
 
 	pstate->tbmiterator = 0;
 
-	/* Initialize the mutex */
-	SpinLockInit(&pstate->mutex);
-	pstate->state = BM_INITIAL;
+	pg_atomic_init_u32(&pstate->state, BM_INITIAL);
 
 	ConditionVariableInit(&pstate->cv);
 
@@ -565,7 +556,7 @@ ExecBitmapHeapReInitializeDSM(BitmapHeapScanState *node,
 	if (dsa == NULL)
 		return;
 
-	pstate->state = BM_INITIAL;
+	pg_atomic_write_u32(&pstate->state, BM_INITIAL);
 
 	if (DsaPointerIsValid(pstate->tbmiterator))
 		tbm_free_shared_area(dsa, pstate->tbmiterator);
-- 
2.50.1 (Apple Git-155)


--Ot5x3ffkWEuxilWO
Content-Type: text/plain; charset=us-ascii
Content-Disposition: attachment;
	filename=v1-0003-convert-FixedParallelState-last_xlog_end-to-an-at.patch



^ permalink  raw  reply  [nested|flat] 440+ messages in thread

* [PATCH v1 2/8] convert ParallelBitmapHeapState->state to an atomic
@ 2026-07-09 18:38 Nathan Bossart <nathan@postgresql.org>
  0 siblings, 0 replies; 440+ messages in thread

From: Nathan Bossart @ 2026-07-09 18:38 UTC (permalink / raw)

---
 src/backend/executor/nodeBitmapHeapscan.c | 21 ++++++---------------
 1 file changed, 6 insertions(+), 15 deletions(-)

diff --git a/src/backend/executor/nodeBitmapHeapscan.c b/src/backend/executor/nodeBitmapHeapscan.c
index 83d6478bc2b..f2bb487bf10 100644
--- a/src/backend/executor/nodeBitmapHeapscan.c
+++ b/src/backend/executor/nodeBitmapHeapscan.c
@@ -79,7 +79,6 @@ typedef enum
 /* ----------------
  *	 ParallelBitmapHeapState information
  *		tbmiterator				iterator for scanning current pages
- *		mutex					mutual exclusion for state
  *		state					current state of the TIDBitmap
  *		cv						conditional wait variable
  * ----------------
@@ -87,8 +86,7 @@ typedef enum
 typedef struct ParallelBitmapHeapState
 {
 	dsa_pointer tbmiterator;
-	slock_t		mutex;
-	SharedBitmapState state;
+	pg_atomic_uint32 state;
 	ConditionVariable cv;
 } ParallelBitmapHeapState;
 
@@ -228,9 +226,7 @@ BitmapHeapNext(BitmapHeapScanState *node)
 static inline void
 BitmapDoneInitializingSharedState(ParallelBitmapHeapState *pstate)
 {
-	SpinLockAcquire(&pstate->mutex);
-	pstate->state = BM_FINISHED;
-	SpinLockRelease(&pstate->mutex);
+	pg_atomic_write_membarrier_u32(&pstate->state, BM_FINISHED);
 	ConditionVariableBroadcast(&pstate->cv);
 }
 
@@ -480,11 +476,8 @@ BitmapShouldInitializeSharedState(ParallelBitmapHeapState *pstate)
 
 	while (1)
 	{
-		SpinLockAcquire(&pstate->mutex);
-		state = pstate->state;
-		if (pstate->state == BM_INITIAL)
-			pstate->state = BM_INPROGRESS;
-		SpinLockRelease(&pstate->mutex);
+		state = BM_INITIAL;
+		pg_atomic_compare_exchange_u32(&pstate->state, &state, BM_INPROGRESS);
 
 		/* Exit if bitmap is done, or if we're the leader. */
 		if (state != BM_INPROGRESS)
@@ -538,9 +531,7 @@ ExecBitmapHeapInitializeDSM(BitmapHeapScanState *node,
 
 	pstate->tbmiterator = 0;
 
-	/* Initialize the mutex */
-	SpinLockInit(&pstate->mutex);
-	pstate->state = BM_INITIAL;
+	pg_atomic_init_u32(&pstate->state, BM_INITIAL);
 
 	ConditionVariableInit(&pstate->cv);
 
@@ -565,7 +556,7 @@ ExecBitmapHeapReInitializeDSM(BitmapHeapScanState *node,
 	if (dsa == NULL)
 		return;
 
-	pstate->state = BM_INITIAL;
+	pg_atomic_write_u32(&pstate->state, BM_INITIAL);
 
 	if (DsaPointerIsValid(pstate->tbmiterator))
 		tbm_free_shared_area(dsa, pstate->tbmiterator);
-- 
2.50.1 (Apple Git-155)


--Ot5x3ffkWEuxilWO
Content-Type: text/plain; charset=us-ascii
Content-Disposition: attachment;
	filename=v1-0003-convert-FixedParallelState-last_xlog_end-to-an-at.patch



^ permalink  raw  reply  [nested|flat] 440+ messages in thread

* [PATCH v1 2/8] convert ParallelBitmapHeapState->state to an atomic
@ 2026-07-09 18:38 Nathan Bossart <nathan@postgresql.org>
  0 siblings, 0 replies; 440+ messages in thread

From: Nathan Bossart @ 2026-07-09 18:38 UTC (permalink / raw)

---
 src/backend/executor/nodeBitmapHeapscan.c | 21 ++++++---------------
 1 file changed, 6 insertions(+), 15 deletions(-)

diff --git a/src/backend/executor/nodeBitmapHeapscan.c b/src/backend/executor/nodeBitmapHeapscan.c
index 83d6478bc2b..f2bb487bf10 100644
--- a/src/backend/executor/nodeBitmapHeapscan.c
+++ b/src/backend/executor/nodeBitmapHeapscan.c
@@ -79,7 +79,6 @@ typedef enum
 /* ----------------
  *	 ParallelBitmapHeapState information
  *		tbmiterator				iterator for scanning current pages
- *		mutex					mutual exclusion for state
  *		state					current state of the TIDBitmap
  *		cv						conditional wait variable
  * ----------------
@@ -87,8 +86,7 @@ typedef enum
 typedef struct ParallelBitmapHeapState
 {
 	dsa_pointer tbmiterator;
-	slock_t		mutex;
-	SharedBitmapState state;
+	pg_atomic_uint32 state;
 	ConditionVariable cv;
 } ParallelBitmapHeapState;
 
@@ -228,9 +226,7 @@ BitmapHeapNext(BitmapHeapScanState *node)
 static inline void
 BitmapDoneInitializingSharedState(ParallelBitmapHeapState *pstate)
 {
-	SpinLockAcquire(&pstate->mutex);
-	pstate->state = BM_FINISHED;
-	SpinLockRelease(&pstate->mutex);
+	pg_atomic_write_membarrier_u32(&pstate->state, BM_FINISHED);
 	ConditionVariableBroadcast(&pstate->cv);
 }
 
@@ -480,11 +476,8 @@ BitmapShouldInitializeSharedState(ParallelBitmapHeapState *pstate)
 
 	while (1)
 	{
-		SpinLockAcquire(&pstate->mutex);
-		state = pstate->state;
-		if (pstate->state == BM_INITIAL)
-			pstate->state = BM_INPROGRESS;
-		SpinLockRelease(&pstate->mutex);
+		state = BM_INITIAL;
+		pg_atomic_compare_exchange_u32(&pstate->state, &state, BM_INPROGRESS);
 
 		/* Exit if bitmap is done, or if we're the leader. */
 		if (state != BM_INPROGRESS)
@@ -538,9 +531,7 @@ ExecBitmapHeapInitializeDSM(BitmapHeapScanState *node,
 
 	pstate->tbmiterator = 0;
 
-	/* Initialize the mutex */
-	SpinLockInit(&pstate->mutex);
-	pstate->state = BM_INITIAL;
+	pg_atomic_init_u32(&pstate->state, BM_INITIAL);
 
 	ConditionVariableInit(&pstate->cv);
 
@@ -565,7 +556,7 @@ ExecBitmapHeapReInitializeDSM(BitmapHeapScanState *node,
 	if (dsa == NULL)
 		return;
 
-	pstate->state = BM_INITIAL;
+	pg_atomic_write_u32(&pstate->state, BM_INITIAL);
 
 	if (DsaPointerIsValid(pstate->tbmiterator))
 		tbm_free_shared_area(dsa, pstate->tbmiterator);
-- 
2.50.1 (Apple Git-155)


--Ot5x3ffkWEuxilWO
Content-Type: text/plain; charset=us-ascii
Content-Disposition: attachment;
	filename=v1-0003-convert-FixedParallelState-last_xlog_end-to-an-at.patch



^ permalink  raw  reply  [nested|flat] 440+ messages in thread

* [PATCH v1 2/8] convert ParallelBitmapHeapState->state to an atomic
@ 2026-07-09 18:38 Nathan Bossart <nathan@postgresql.org>
  0 siblings, 0 replies; 440+ messages in thread

From: Nathan Bossart @ 2026-07-09 18:38 UTC (permalink / raw)

---
 src/backend/executor/nodeBitmapHeapscan.c | 21 ++++++---------------
 1 file changed, 6 insertions(+), 15 deletions(-)

diff --git a/src/backend/executor/nodeBitmapHeapscan.c b/src/backend/executor/nodeBitmapHeapscan.c
index 83d6478bc2b..f2bb487bf10 100644
--- a/src/backend/executor/nodeBitmapHeapscan.c
+++ b/src/backend/executor/nodeBitmapHeapscan.c
@@ -79,7 +79,6 @@ typedef enum
 /* ----------------
  *	 ParallelBitmapHeapState information
  *		tbmiterator				iterator for scanning current pages
- *		mutex					mutual exclusion for state
  *		state					current state of the TIDBitmap
  *		cv						conditional wait variable
  * ----------------
@@ -87,8 +86,7 @@ typedef enum
 typedef struct ParallelBitmapHeapState
 {
 	dsa_pointer tbmiterator;
-	slock_t		mutex;
-	SharedBitmapState state;
+	pg_atomic_uint32 state;
 	ConditionVariable cv;
 } ParallelBitmapHeapState;
 
@@ -228,9 +226,7 @@ BitmapHeapNext(BitmapHeapScanState *node)
 static inline void
 BitmapDoneInitializingSharedState(ParallelBitmapHeapState *pstate)
 {
-	SpinLockAcquire(&pstate->mutex);
-	pstate->state = BM_FINISHED;
-	SpinLockRelease(&pstate->mutex);
+	pg_atomic_write_membarrier_u32(&pstate->state, BM_FINISHED);
 	ConditionVariableBroadcast(&pstate->cv);
 }
 
@@ -480,11 +476,8 @@ BitmapShouldInitializeSharedState(ParallelBitmapHeapState *pstate)
 
 	while (1)
 	{
-		SpinLockAcquire(&pstate->mutex);
-		state = pstate->state;
-		if (pstate->state == BM_INITIAL)
-			pstate->state = BM_INPROGRESS;
-		SpinLockRelease(&pstate->mutex);
+		state = BM_INITIAL;
+		pg_atomic_compare_exchange_u32(&pstate->state, &state, BM_INPROGRESS);
 
 		/* Exit if bitmap is done, or if we're the leader. */
 		if (state != BM_INPROGRESS)
@@ -538,9 +531,7 @@ ExecBitmapHeapInitializeDSM(BitmapHeapScanState *node,
 
 	pstate->tbmiterator = 0;
 
-	/* Initialize the mutex */
-	SpinLockInit(&pstate->mutex);
-	pstate->state = BM_INITIAL;
+	pg_atomic_init_u32(&pstate->state, BM_INITIAL);
 
 	ConditionVariableInit(&pstate->cv);
 
@@ -565,7 +556,7 @@ ExecBitmapHeapReInitializeDSM(BitmapHeapScanState *node,
 	if (dsa == NULL)
 		return;
 
-	pstate->state = BM_INITIAL;
+	pg_atomic_write_u32(&pstate->state, BM_INITIAL);
 
 	if (DsaPointerIsValid(pstate->tbmiterator))
 		tbm_free_shared_area(dsa, pstate->tbmiterator);
-- 
2.50.1 (Apple Git-155)


--Ot5x3ffkWEuxilWO
Content-Type: text/plain; charset=us-ascii
Content-Disposition: attachment;
	filename=v1-0003-convert-FixedParallelState-last_xlog_end-to-an-at.patch



^ permalink  raw  reply  [nested|flat] 440+ messages in thread

* [PATCH v1 2/8] convert ParallelBitmapHeapState->state to an atomic
@ 2026-07-09 18:38 Nathan Bossart <nathan@postgresql.org>
  0 siblings, 0 replies; 440+ messages in thread

From: Nathan Bossart @ 2026-07-09 18:38 UTC (permalink / raw)

---
 src/backend/executor/nodeBitmapHeapscan.c | 21 ++++++---------------
 1 file changed, 6 insertions(+), 15 deletions(-)

diff --git a/src/backend/executor/nodeBitmapHeapscan.c b/src/backend/executor/nodeBitmapHeapscan.c
index 83d6478bc2b..f2bb487bf10 100644
--- a/src/backend/executor/nodeBitmapHeapscan.c
+++ b/src/backend/executor/nodeBitmapHeapscan.c
@@ -79,7 +79,6 @@ typedef enum
 /* ----------------
  *	 ParallelBitmapHeapState information
  *		tbmiterator				iterator for scanning current pages
- *		mutex					mutual exclusion for state
  *		state					current state of the TIDBitmap
  *		cv						conditional wait variable
  * ----------------
@@ -87,8 +86,7 @@ typedef enum
 typedef struct ParallelBitmapHeapState
 {
 	dsa_pointer tbmiterator;
-	slock_t		mutex;
-	SharedBitmapState state;
+	pg_atomic_uint32 state;
 	ConditionVariable cv;
 } ParallelBitmapHeapState;
 
@@ -228,9 +226,7 @@ BitmapHeapNext(BitmapHeapScanState *node)
 static inline void
 BitmapDoneInitializingSharedState(ParallelBitmapHeapState *pstate)
 {
-	SpinLockAcquire(&pstate->mutex);
-	pstate->state = BM_FINISHED;
-	SpinLockRelease(&pstate->mutex);
+	pg_atomic_write_membarrier_u32(&pstate->state, BM_FINISHED);
 	ConditionVariableBroadcast(&pstate->cv);
 }
 
@@ -480,11 +476,8 @@ BitmapShouldInitializeSharedState(ParallelBitmapHeapState *pstate)
 
 	while (1)
 	{
-		SpinLockAcquire(&pstate->mutex);
-		state = pstate->state;
-		if (pstate->state == BM_INITIAL)
-			pstate->state = BM_INPROGRESS;
-		SpinLockRelease(&pstate->mutex);
+		state = BM_INITIAL;
+		pg_atomic_compare_exchange_u32(&pstate->state, &state, BM_INPROGRESS);
 
 		/* Exit if bitmap is done, or if we're the leader. */
 		if (state != BM_INPROGRESS)
@@ -538,9 +531,7 @@ ExecBitmapHeapInitializeDSM(BitmapHeapScanState *node,
 
 	pstate->tbmiterator = 0;
 
-	/* Initialize the mutex */
-	SpinLockInit(&pstate->mutex);
-	pstate->state = BM_INITIAL;
+	pg_atomic_init_u32(&pstate->state, BM_INITIAL);
 
 	ConditionVariableInit(&pstate->cv);
 
@@ -565,7 +556,7 @@ ExecBitmapHeapReInitializeDSM(BitmapHeapScanState *node,
 	if (dsa == NULL)
 		return;
 
-	pstate->state = BM_INITIAL;
+	pg_atomic_write_u32(&pstate->state, BM_INITIAL);
 
 	if (DsaPointerIsValid(pstate->tbmiterator))
 		tbm_free_shared_area(dsa, pstate->tbmiterator);
-- 
2.50.1 (Apple Git-155)


--Ot5x3ffkWEuxilWO
Content-Type: text/plain; charset=us-ascii
Content-Disposition: attachment;
	filename=v1-0003-convert-FixedParallelState-last_xlog_end-to-an-at.patch



^ permalink  raw  reply  [nested|flat] 440+ messages in thread

* [PATCH v1 2/8] convert ParallelBitmapHeapState->state to an atomic
@ 2026-07-09 18:38 Nathan Bossart <nathan@postgresql.org>
  0 siblings, 0 replies; 440+ messages in thread

From: Nathan Bossart @ 2026-07-09 18:38 UTC (permalink / raw)

---
 src/backend/executor/nodeBitmapHeapscan.c | 21 ++++++---------------
 1 file changed, 6 insertions(+), 15 deletions(-)

diff --git a/src/backend/executor/nodeBitmapHeapscan.c b/src/backend/executor/nodeBitmapHeapscan.c
index 83d6478bc2b..f2bb487bf10 100644
--- a/src/backend/executor/nodeBitmapHeapscan.c
+++ b/src/backend/executor/nodeBitmapHeapscan.c
@@ -79,7 +79,6 @@ typedef enum
 /* ----------------
  *	 ParallelBitmapHeapState information
  *		tbmiterator				iterator for scanning current pages
- *		mutex					mutual exclusion for state
  *		state					current state of the TIDBitmap
  *		cv						conditional wait variable
  * ----------------
@@ -87,8 +86,7 @@ typedef enum
 typedef struct ParallelBitmapHeapState
 {
 	dsa_pointer tbmiterator;
-	slock_t		mutex;
-	SharedBitmapState state;
+	pg_atomic_uint32 state;
 	ConditionVariable cv;
 } ParallelBitmapHeapState;
 
@@ -228,9 +226,7 @@ BitmapHeapNext(BitmapHeapScanState *node)
 static inline void
 BitmapDoneInitializingSharedState(ParallelBitmapHeapState *pstate)
 {
-	SpinLockAcquire(&pstate->mutex);
-	pstate->state = BM_FINISHED;
-	SpinLockRelease(&pstate->mutex);
+	pg_atomic_write_membarrier_u32(&pstate->state, BM_FINISHED);
 	ConditionVariableBroadcast(&pstate->cv);
 }
 
@@ -480,11 +476,8 @@ BitmapShouldInitializeSharedState(ParallelBitmapHeapState *pstate)
 
 	while (1)
 	{
-		SpinLockAcquire(&pstate->mutex);
-		state = pstate->state;
-		if (pstate->state == BM_INITIAL)
-			pstate->state = BM_INPROGRESS;
-		SpinLockRelease(&pstate->mutex);
+		state = BM_INITIAL;
+		pg_atomic_compare_exchange_u32(&pstate->state, &state, BM_INPROGRESS);
 
 		/* Exit if bitmap is done, or if we're the leader. */
 		if (state != BM_INPROGRESS)
@@ -538,9 +531,7 @@ ExecBitmapHeapInitializeDSM(BitmapHeapScanState *node,
 
 	pstate->tbmiterator = 0;
 
-	/* Initialize the mutex */
-	SpinLockInit(&pstate->mutex);
-	pstate->state = BM_INITIAL;
+	pg_atomic_init_u32(&pstate->state, BM_INITIAL);
 
 	ConditionVariableInit(&pstate->cv);
 
@@ -565,7 +556,7 @@ ExecBitmapHeapReInitializeDSM(BitmapHeapScanState *node,
 	if (dsa == NULL)
 		return;
 
-	pstate->state = BM_INITIAL;
+	pg_atomic_write_u32(&pstate->state, BM_INITIAL);
 
 	if (DsaPointerIsValid(pstate->tbmiterator))
 		tbm_free_shared_area(dsa, pstate->tbmiterator);
-- 
2.50.1 (Apple Git-155)


--Ot5x3ffkWEuxilWO
Content-Type: text/plain; charset=us-ascii
Content-Disposition: attachment;
	filename=v1-0003-convert-FixedParallelState-last_xlog_end-to-an-at.patch



^ permalink  raw  reply  [nested|flat] 440+ messages in thread

* [PATCH v1 2/8] convert ParallelBitmapHeapState->state to an atomic
@ 2026-07-09 18:38 Nathan Bossart <nathan@postgresql.org>
  0 siblings, 0 replies; 440+ messages in thread

From: Nathan Bossart @ 2026-07-09 18:38 UTC (permalink / raw)

---
 src/backend/executor/nodeBitmapHeapscan.c | 21 ++++++---------------
 1 file changed, 6 insertions(+), 15 deletions(-)

diff --git a/src/backend/executor/nodeBitmapHeapscan.c b/src/backend/executor/nodeBitmapHeapscan.c
index 83d6478bc2b..f2bb487bf10 100644
--- a/src/backend/executor/nodeBitmapHeapscan.c
+++ b/src/backend/executor/nodeBitmapHeapscan.c
@@ -79,7 +79,6 @@ typedef enum
 /* ----------------
  *	 ParallelBitmapHeapState information
  *		tbmiterator				iterator for scanning current pages
- *		mutex					mutual exclusion for state
  *		state					current state of the TIDBitmap
  *		cv						conditional wait variable
  * ----------------
@@ -87,8 +86,7 @@ typedef enum
 typedef struct ParallelBitmapHeapState
 {
 	dsa_pointer tbmiterator;
-	slock_t		mutex;
-	SharedBitmapState state;
+	pg_atomic_uint32 state;
 	ConditionVariable cv;
 } ParallelBitmapHeapState;
 
@@ -228,9 +226,7 @@ BitmapHeapNext(BitmapHeapScanState *node)
 static inline void
 BitmapDoneInitializingSharedState(ParallelBitmapHeapState *pstate)
 {
-	SpinLockAcquire(&pstate->mutex);
-	pstate->state = BM_FINISHED;
-	SpinLockRelease(&pstate->mutex);
+	pg_atomic_write_membarrier_u32(&pstate->state, BM_FINISHED);
 	ConditionVariableBroadcast(&pstate->cv);
 }
 
@@ -480,11 +476,8 @@ BitmapShouldInitializeSharedState(ParallelBitmapHeapState *pstate)
 
 	while (1)
 	{
-		SpinLockAcquire(&pstate->mutex);
-		state = pstate->state;
-		if (pstate->state == BM_INITIAL)
-			pstate->state = BM_INPROGRESS;
-		SpinLockRelease(&pstate->mutex);
+		state = BM_INITIAL;
+		pg_atomic_compare_exchange_u32(&pstate->state, &state, BM_INPROGRESS);
 
 		/* Exit if bitmap is done, or if we're the leader. */
 		if (state != BM_INPROGRESS)
@@ -538,9 +531,7 @@ ExecBitmapHeapInitializeDSM(BitmapHeapScanState *node,
 
 	pstate->tbmiterator = 0;
 
-	/* Initialize the mutex */
-	SpinLockInit(&pstate->mutex);
-	pstate->state = BM_INITIAL;
+	pg_atomic_init_u32(&pstate->state, BM_INITIAL);
 
 	ConditionVariableInit(&pstate->cv);
 
@@ -565,7 +556,7 @@ ExecBitmapHeapReInitializeDSM(BitmapHeapScanState *node,
 	if (dsa == NULL)
 		return;
 
-	pstate->state = BM_INITIAL;
+	pg_atomic_write_u32(&pstate->state, BM_INITIAL);
 
 	if (DsaPointerIsValid(pstate->tbmiterator))
 		tbm_free_shared_area(dsa, pstate->tbmiterator);
-- 
2.50.1 (Apple Git-155)


--Ot5x3ffkWEuxilWO
Content-Type: text/plain; charset=us-ascii
Content-Disposition: attachment;
	filename=v1-0003-convert-FixedParallelState-last_xlog_end-to-an-at.patch



^ permalink  raw  reply  [nested|flat] 440+ messages in thread

* [PATCH v1 2/8] convert ParallelBitmapHeapState->state to an atomic
@ 2026-07-09 18:38 Nathan Bossart <nathan@postgresql.org>
  0 siblings, 0 replies; 440+ messages in thread

From: Nathan Bossart @ 2026-07-09 18:38 UTC (permalink / raw)

---
 src/backend/executor/nodeBitmapHeapscan.c | 21 ++++++---------------
 1 file changed, 6 insertions(+), 15 deletions(-)

diff --git a/src/backend/executor/nodeBitmapHeapscan.c b/src/backend/executor/nodeBitmapHeapscan.c
index 83d6478bc2b..f2bb487bf10 100644
--- a/src/backend/executor/nodeBitmapHeapscan.c
+++ b/src/backend/executor/nodeBitmapHeapscan.c
@@ -79,7 +79,6 @@ typedef enum
 /* ----------------
  *	 ParallelBitmapHeapState information
  *		tbmiterator				iterator for scanning current pages
- *		mutex					mutual exclusion for state
  *		state					current state of the TIDBitmap
  *		cv						conditional wait variable
  * ----------------
@@ -87,8 +86,7 @@ typedef enum
 typedef struct ParallelBitmapHeapState
 {
 	dsa_pointer tbmiterator;
-	slock_t		mutex;
-	SharedBitmapState state;
+	pg_atomic_uint32 state;
 	ConditionVariable cv;
 } ParallelBitmapHeapState;
 
@@ -228,9 +226,7 @@ BitmapHeapNext(BitmapHeapScanState *node)
 static inline void
 BitmapDoneInitializingSharedState(ParallelBitmapHeapState *pstate)
 {
-	SpinLockAcquire(&pstate->mutex);
-	pstate->state = BM_FINISHED;
-	SpinLockRelease(&pstate->mutex);
+	pg_atomic_write_membarrier_u32(&pstate->state, BM_FINISHED);
 	ConditionVariableBroadcast(&pstate->cv);
 }
 
@@ -480,11 +476,8 @@ BitmapShouldInitializeSharedState(ParallelBitmapHeapState *pstate)
 
 	while (1)
 	{
-		SpinLockAcquire(&pstate->mutex);
-		state = pstate->state;
-		if (pstate->state == BM_INITIAL)
-			pstate->state = BM_INPROGRESS;
-		SpinLockRelease(&pstate->mutex);
+		state = BM_INITIAL;
+		pg_atomic_compare_exchange_u32(&pstate->state, &state, BM_INPROGRESS);
 
 		/* Exit if bitmap is done, or if we're the leader. */
 		if (state != BM_INPROGRESS)
@@ -538,9 +531,7 @@ ExecBitmapHeapInitializeDSM(BitmapHeapScanState *node,
 
 	pstate->tbmiterator = 0;
 
-	/* Initialize the mutex */
-	SpinLockInit(&pstate->mutex);
-	pstate->state = BM_INITIAL;
+	pg_atomic_init_u32(&pstate->state, BM_INITIAL);
 
 	ConditionVariableInit(&pstate->cv);
 
@@ -565,7 +556,7 @@ ExecBitmapHeapReInitializeDSM(BitmapHeapScanState *node,
 	if (dsa == NULL)
 		return;
 
-	pstate->state = BM_INITIAL;
+	pg_atomic_write_u32(&pstate->state, BM_INITIAL);
 
 	if (DsaPointerIsValid(pstate->tbmiterator))
 		tbm_free_shared_area(dsa, pstate->tbmiterator);
-- 
2.50.1 (Apple Git-155)


--Ot5x3ffkWEuxilWO
Content-Type: text/plain; charset=us-ascii
Content-Disposition: attachment;
	filename=v1-0003-convert-FixedParallelState-last_xlog_end-to-an-at.patch



^ permalink  raw  reply  [nested|flat] 440+ messages in thread

* [PATCH v1 2/8] convert ParallelBitmapHeapState->state to an atomic
@ 2026-07-09 18:38 Nathan Bossart <nathan@postgresql.org>
  0 siblings, 0 replies; 440+ messages in thread

From: Nathan Bossart @ 2026-07-09 18:38 UTC (permalink / raw)

---
 src/backend/executor/nodeBitmapHeapscan.c | 21 ++++++---------------
 1 file changed, 6 insertions(+), 15 deletions(-)

diff --git a/src/backend/executor/nodeBitmapHeapscan.c b/src/backend/executor/nodeBitmapHeapscan.c
index 83d6478bc2b..f2bb487bf10 100644
--- a/src/backend/executor/nodeBitmapHeapscan.c
+++ b/src/backend/executor/nodeBitmapHeapscan.c
@@ -79,7 +79,6 @@ typedef enum
 /* ----------------
  *	 ParallelBitmapHeapState information
  *		tbmiterator				iterator for scanning current pages
- *		mutex					mutual exclusion for state
  *		state					current state of the TIDBitmap
  *		cv						conditional wait variable
  * ----------------
@@ -87,8 +86,7 @@ typedef enum
 typedef struct ParallelBitmapHeapState
 {
 	dsa_pointer tbmiterator;
-	slock_t		mutex;
-	SharedBitmapState state;
+	pg_atomic_uint32 state;
 	ConditionVariable cv;
 } ParallelBitmapHeapState;
 
@@ -228,9 +226,7 @@ BitmapHeapNext(BitmapHeapScanState *node)
 static inline void
 BitmapDoneInitializingSharedState(ParallelBitmapHeapState *pstate)
 {
-	SpinLockAcquire(&pstate->mutex);
-	pstate->state = BM_FINISHED;
-	SpinLockRelease(&pstate->mutex);
+	pg_atomic_write_membarrier_u32(&pstate->state, BM_FINISHED);
 	ConditionVariableBroadcast(&pstate->cv);
 }
 
@@ -480,11 +476,8 @@ BitmapShouldInitializeSharedState(ParallelBitmapHeapState *pstate)
 
 	while (1)
 	{
-		SpinLockAcquire(&pstate->mutex);
-		state = pstate->state;
-		if (pstate->state == BM_INITIAL)
-			pstate->state = BM_INPROGRESS;
-		SpinLockRelease(&pstate->mutex);
+		state = BM_INITIAL;
+		pg_atomic_compare_exchange_u32(&pstate->state, &state, BM_INPROGRESS);
 
 		/* Exit if bitmap is done, or if we're the leader. */
 		if (state != BM_INPROGRESS)
@@ -538,9 +531,7 @@ ExecBitmapHeapInitializeDSM(BitmapHeapScanState *node,
 
 	pstate->tbmiterator = 0;
 
-	/* Initialize the mutex */
-	SpinLockInit(&pstate->mutex);
-	pstate->state = BM_INITIAL;
+	pg_atomic_init_u32(&pstate->state, BM_INITIAL);
 
 	ConditionVariableInit(&pstate->cv);
 
@@ -565,7 +556,7 @@ ExecBitmapHeapReInitializeDSM(BitmapHeapScanState *node,
 	if (dsa == NULL)
 		return;
 
-	pstate->state = BM_INITIAL;
+	pg_atomic_write_u32(&pstate->state, BM_INITIAL);
 
 	if (DsaPointerIsValid(pstate->tbmiterator))
 		tbm_free_shared_area(dsa, pstate->tbmiterator);
-- 
2.50.1 (Apple Git-155)


--Ot5x3ffkWEuxilWO
Content-Type: text/plain; charset=us-ascii
Content-Disposition: attachment;
	filename=v1-0003-convert-FixedParallelState-last_xlog_end-to-an-at.patch



^ permalink  raw  reply  [nested|flat] 440+ messages in thread

* [PATCH v1 2/8] convert ParallelBitmapHeapState->state to an atomic
@ 2026-07-09 18:38 Nathan Bossart <nathan@postgresql.org>
  0 siblings, 0 replies; 440+ messages in thread

From: Nathan Bossart @ 2026-07-09 18:38 UTC (permalink / raw)

---
 src/backend/executor/nodeBitmapHeapscan.c | 21 ++++++---------------
 1 file changed, 6 insertions(+), 15 deletions(-)

diff --git a/src/backend/executor/nodeBitmapHeapscan.c b/src/backend/executor/nodeBitmapHeapscan.c
index 83d6478bc2b..f2bb487bf10 100644
--- a/src/backend/executor/nodeBitmapHeapscan.c
+++ b/src/backend/executor/nodeBitmapHeapscan.c
@@ -79,7 +79,6 @@ typedef enum
 /* ----------------
  *	 ParallelBitmapHeapState information
  *		tbmiterator				iterator for scanning current pages
- *		mutex					mutual exclusion for state
  *		state					current state of the TIDBitmap
  *		cv						conditional wait variable
  * ----------------
@@ -87,8 +86,7 @@ typedef enum
 typedef struct ParallelBitmapHeapState
 {
 	dsa_pointer tbmiterator;
-	slock_t		mutex;
-	SharedBitmapState state;
+	pg_atomic_uint32 state;
 	ConditionVariable cv;
 } ParallelBitmapHeapState;
 
@@ -228,9 +226,7 @@ BitmapHeapNext(BitmapHeapScanState *node)
 static inline void
 BitmapDoneInitializingSharedState(ParallelBitmapHeapState *pstate)
 {
-	SpinLockAcquire(&pstate->mutex);
-	pstate->state = BM_FINISHED;
-	SpinLockRelease(&pstate->mutex);
+	pg_atomic_write_membarrier_u32(&pstate->state, BM_FINISHED);
 	ConditionVariableBroadcast(&pstate->cv);
 }
 
@@ -480,11 +476,8 @@ BitmapShouldInitializeSharedState(ParallelBitmapHeapState *pstate)
 
 	while (1)
 	{
-		SpinLockAcquire(&pstate->mutex);
-		state = pstate->state;
-		if (pstate->state == BM_INITIAL)
-			pstate->state = BM_INPROGRESS;
-		SpinLockRelease(&pstate->mutex);
+		state = BM_INITIAL;
+		pg_atomic_compare_exchange_u32(&pstate->state, &state, BM_INPROGRESS);
 
 		/* Exit if bitmap is done, or if we're the leader. */
 		if (state != BM_INPROGRESS)
@@ -538,9 +531,7 @@ ExecBitmapHeapInitializeDSM(BitmapHeapScanState *node,
 
 	pstate->tbmiterator = 0;
 
-	/* Initialize the mutex */
-	SpinLockInit(&pstate->mutex);
-	pstate->state = BM_INITIAL;
+	pg_atomic_init_u32(&pstate->state, BM_INITIAL);
 
 	ConditionVariableInit(&pstate->cv);
 
@@ -565,7 +556,7 @@ ExecBitmapHeapReInitializeDSM(BitmapHeapScanState *node,
 	if (dsa == NULL)
 		return;
 
-	pstate->state = BM_INITIAL;
+	pg_atomic_write_u32(&pstate->state, BM_INITIAL);
 
 	if (DsaPointerIsValid(pstate->tbmiterator))
 		tbm_free_shared_area(dsa, pstate->tbmiterator);
-- 
2.50.1 (Apple Git-155)


--Ot5x3ffkWEuxilWO
Content-Type: text/plain; charset=us-ascii
Content-Disposition: attachment;
	filename=v1-0003-convert-FixedParallelState-last_xlog_end-to-an-at.patch



^ permalink  raw  reply  [nested|flat] 440+ messages in thread

* [PATCH v2 2/9] convert ParallelBitmapHeapState->state to an atomic
@ 2026-07-09 18:38 Nathan Bossart <nathan@postgresql.org>
  0 siblings, 0 replies; 440+ messages in thread

From: Nathan Bossart @ 2026-07-09 18:38 UTC (permalink / raw)

---
 src/backend/executor/nodeBitmapHeapscan.c | 23 +++++++----------------
 1 file changed, 7 insertions(+), 16 deletions(-)

diff --git a/src/backend/executor/nodeBitmapHeapscan.c b/src/backend/executor/nodeBitmapHeapscan.c
index 83d6478bc2b..a9e83f30687 100644
--- a/src/backend/executor/nodeBitmapHeapscan.c
+++ b/src/backend/executor/nodeBitmapHeapscan.c
@@ -79,7 +79,6 @@ typedef enum
 /* ----------------
  *	 ParallelBitmapHeapState information
  *		tbmiterator				iterator for scanning current pages
- *		mutex					mutual exclusion for state
  *		state					current state of the TIDBitmap
  *		cv						conditional wait variable
  * ----------------
@@ -87,8 +86,7 @@ typedef enum
 typedef struct ParallelBitmapHeapState
 {
 	dsa_pointer tbmiterator;
-	slock_t		mutex;
-	SharedBitmapState state;
+	pg_atomic_uint32 state;
 	ConditionVariable cv;
 } ParallelBitmapHeapState;
 
@@ -228,9 +226,7 @@ BitmapHeapNext(BitmapHeapScanState *node)
 static inline void
 BitmapDoneInitializingSharedState(ParallelBitmapHeapState *pstate)
 {
-	SpinLockAcquire(&pstate->mutex);
-	pstate->state = BM_FINISHED;
-	SpinLockRelease(&pstate->mutex);
+	pg_atomic_write_membarrier_u32(&pstate->state, BM_FINISHED);
 	ConditionVariableBroadcast(&pstate->cv);
 }
 
@@ -476,15 +472,12 @@ ExecInitBitmapHeapScan(BitmapHeapScan *node, EState *estate, int eflags)
 static bool
 BitmapShouldInitializeSharedState(ParallelBitmapHeapState *pstate)
 {
-	SharedBitmapState state;
+	uint32		state;
 
 	while (1)
 	{
-		SpinLockAcquire(&pstate->mutex);
-		state = pstate->state;
-		if (pstate->state == BM_INITIAL)
-			pstate->state = BM_INPROGRESS;
-		SpinLockRelease(&pstate->mutex);
+		state = BM_INITIAL;
+		pg_atomic_compare_exchange_u32(&pstate->state, &state, BM_INPROGRESS);
 
 		/* Exit if bitmap is done, or if we're the leader. */
 		if (state != BM_INPROGRESS)
@@ -538,9 +531,7 @@ ExecBitmapHeapInitializeDSM(BitmapHeapScanState *node,
 
 	pstate->tbmiterator = 0;
 
-	/* Initialize the mutex */
-	SpinLockInit(&pstate->mutex);
-	pstate->state = BM_INITIAL;
+	pg_atomic_init_u32(&pstate->state, BM_INITIAL);
 
 	ConditionVariableInit(&pstate->cv);
 
@@ -565,7 +556,7 @@ ExecBitmapHeapReInitializeDSM(BitmapHeapScanState *node,
 	if (dsa == NULL)
 		return;
 
-	pstate->state = BM_INITIAL;
+	pg_atomic_write_u32(&pstate->state, BM_INITIAL);
 
 	if (DsaPointerIsValid(pstate->tbmiterator))
 		tbm_free_shared_area(dsa, pstate->tbmiterator);
-- 
2.50.1 (Apple Git-155)


--Xf36GNcW+0xZNily
Content-Type: text/plain; charset=us-ascii
Content-Disposition: attachment;
	filename=v2-0003-convert-FixedParallelState-last_xlog_end-to-an-at.patch



^ permalink  raw  reply  [nested|flat] 440+ messages in thread

* [PATCH v2 2/9] convert ParallelBitmapHeapState->state to an atomic
@ 2026-07-09 18:38 Nathan Bossart <nathan@postgresql.org>
  0 siblings, 0 replies; 440+ messages in thread

From: Nathan Bossart @ 2026-07-09 18:38 UTC (permalink / raw)

---
 src/backend/executor/nodeBitmapHeapscan.c | 23 +++++++----------------
 1 file changed, 7 insertions(+), 16 deletions(-)

diff --git a/src/backend/executor/nodeBitmapHeapscan.c b/src/backend/executor/nodeBitmapHeapscan.c
index 83d6478bc2b..a9e83f30687 100644
--- a/src/backend/executor/nodeBitmapHeapscan.c
+++ b/src/backend/executor/nodeBitmapHeapscan.c
@@ -79,7 +79,6 @@ typedef enum
 /* ----------------
  *	 ParallelBitmapHeapState information
  *		tbmiterator				iterator for scanning current pages
- *		mutex					mutual exclusion for state
  *		state					current state of the TIDBitmap
  *		cv						conditional wait variable
  * ----------------
@@ -87,8 +86,7 @@ typedef enum
 typedef struct ParallelBitmapHeapState
 {
 	dsa_pointer tbmiterator;
-	slock_t		mutex;
-	SharedBitmapState state;
+	pg_atomic_uint32 state;
 	ConditionVariable cv;
 } ParallelBitmapHeapState;
 
@@ -228,9 +226,7 @@ BitmapHeapNext(BitmapHeapScanState *node)
 static inline void
 BitmapDoneInitializingSharedState(ParallelBitmapHeapState *pstate)
 {
-	SpinLockAcquire(&pstate->mutex);
-	pstate->state = BM_FINISHED;
-	SpinLockRelease(&pstate->mutex);
+	pg_atomic_write_membarrier_u32(&pstate->state, BM_FINISHED);
 	ConditionVariableBroadcast(&pstate->cv);
 }
 
@@ -476,15 +472,12 @@ ExecInitBitmapHeapScan(BitmapHeapScan *node, EState *estate, int eflags)
 static bool
 BitmapShouldInitializeSharedState(ParallelBitmapHeapState *pstate)
 {
-	SharedBitmapState state;
+	uint32		state;
 
 	while (1)
 	{
-		SpinLockAcquire(&pstate->mutex);
-		state = pstate->state;
-		if (pstate->state == BM_INITIAL)
-			pstate->state = BM_INPROGRESS;
-		SpinLockRelease(&pstate->mutex);
+		state = BM_INITIAL;
+		pg_atomic_compare_exchange_u32(&pstate->state, &state, BM_INPROGRESS);
 
 		/* Exit if bitmap is done, or if we're the leader. */
 		if (state != BM_INPROGRESS)
@@ -538,9 +531,7 @@ ExecBitmapHeapInitializeDSM(BitmapHeapScanState *node,
 
 	pstate->tbmiterator = 0;
 
-	/* Initialize the mutex */
-	SpinLockInit(&pstate->mutex);
-	pstate->state = BM_INITIAL;
+	pg_atomic_init_u32(&pstate->state, BM_INITIAL);
 
 	ConditionVariableInit(&pstate->cv);
 
@@ -565,7 +556,7 @@ ExecBitmapHeapReInitializeDSM(BitmapHeapScanState *node,
 	if (dsa == NULL)
 		return;
 
-	pstate->state = BM_INITIAL;
+	pg_atomic_write_u32(&pstate->state, BM_INITIAL);
 
 	if (DsaPointerIsValid(pstate->tbmiterator))
 		tbm_free_shared_area(dsa, pstate->tbmiterator);
-- 
2.50.1 (Apple Git-155)


--Xf36GNcW+0xZNily
Content-Type: text/plain; charset=us-ascii
Content-Disposition: attachment;
	filename=v2-0003-convert-FixedParallelState-last_xlog_end-to-an-at.patch



^ permalink  raw  reply  [nested|flat] 440+ messages in thread

* [PATCH v2 2/9] convert ParallelBitmapHeapState->state to an atomic
@ 2026-07-09 18:38 Nathan Bossart <nathan@postgresql.org>
  0 siblings, 0 replies; 440+ messages in thread

From: Nathan Bossart @ 2026-07-09 18:38 UTC (permalink / raw)

---
 src/backend/executor/nodeBitmapHeapscan.c | 23 +++++++----------------
 1 file changed, 7 insertions(+), 16 deletions(-)

diff --git a/src/backend/executor/nodeBitmapHeapscan.c b/src/backend/executor/nodeBitmapHeapscan.c
index 83d6478bc2b..a9e83f30687 100644
--- a/src/backend/executor/nodeBitmapHeapscan.c
+++ b/src/backend/executor/nodeBitmapHeapscan.c
@@ -79,7 +79,6 @@ typedef enum
 /* ----------------
  *	 ParallelBitmapHeapState information
  *		tbmiterator				iterator for scanning current pages
- *		mutex					mutual exclusion for state
  *		state					current state of the TIDBitmap
  *		cv						conditional wait variable
  * ----------------
@@ -87,8 +86,7 @@ typedef enum
 typedef struct ParallelBitmapHeapState
 {
 	dsa_pointer tbmiterator;
-	slock_t		mutex;
-	SharedBitmapState state;
+	pg_atomic_uint32 state;
 	ConditionVariable cv;
 } ParallelBitmapHeapState;
 
@@ -228,9 +226,7 @@ BitmapHeapNext(BitmapHeapScanState *node)
 static inline void
 BitmapDoneInitializingSharedState(ParallelBitmapHeapState *pstate)
 {
-	SpinLockAcquire(&pstate->mutex);
-	pstate->state = BM_FINISHED;
-	SpinLockRelease(&pstate->mutex);
+	pg_atomic_write_membarrier_u32(&pstate->state, BM_FINISHED);
 	ConditionVariableBroadcast(&pstate->cv);
 }
 
@@ -476,15 +472,12 @@ ExecInitBitmapHeapScan(BitmapHeapScan *node, EState *estate, int eflags)
 static bool
 BitmapShouldInitializeSharedState(ParallelBitmapHeapState *pstate)
 {
-	SharedBitmapState state;
+	uint32		state;
 
 	while (1)
 	{
-		SpinLockAcquire(&pstate->mutex);
-		state = pstate->state;
-		if (pstate->state == BM_INITIAL)
-			pstate->state = BM_INPROGRESS;
-		SpinLockRelease(&pstate->mutex);
+		state = BM_INITIAL;
+		pg_atomic_compare_exchange_u32(&pstate->state, &state, BM_INPROGRESS);
 
 		/* Exit if bitmap is done, or if we're the leader. */
 		if (state != BM_INPROGRESS)
@@ -538,9 +531,7 @@ ExecBitmapHeapInitializeDSM(BitmapHeapScanState *node,
 
 	pstate->tbmiterator = 0;
 
-	/* Initialize the mutex */
-	SpinLockInit(&pstate->mutex);
-	pstate->state = BM_INITIAL;
+	pg_atomic_init_u32(&pstate->state, BM_INITIAL);
 
 	ConditionVariableInit(&pstate->cv);
 
@@ -565,7 +556,7 @@ ExecBitmapHeapReInitializeDSM(BitmapHeapScanState *node,
 	if (dsa == NULL)
 		return;
 
-	pstate->state = BM_INITIAL;
+	pg_atomic_write_u32(&pstate->state, BM_INITIAL);
 
 	if (DsaPointerIsValid(pstate->tbmiterator))
 		tbm_free_shared_area(dsa, pstate->tbmiterator);
-- 
2.50.1 (Apple Git-155)


--Xf36GNcW+0xZNily
Content-Type: text/plain; charset=us-ascii
Content-Disposition: attachment;
	filename=v2-0003-convert-FixedParallelState-last_xlog_end-to-an-at.patch



^ permalink  raw  reply  [nested|flat] 440+ messages in thread

* [PATCH v2 2/9] convert ParallelBitmapHeapState->state to an atomic
@ 2026-07-09 18:38 Nathan Bossart <nathan@postgresql.org>
  0 siblings, 0 replies; 440+ messages in thread

From: Nathan Bossart @ 2026-07-09 18:38 UTC (permalink / raw)

---
 src/backend/executor/nodeBitmapHeapscan.c | 23 +++++++----------------
 1 file changed, 7 insertions(+), 16 deletions(-)

diff --git a/src/backend/executor/nodeBitmapHeapscan.c b/src/backend/executor/nodeBitmapHeapscan.c
index 83d6478bc2b..a9e83f30687 100644
--- a/src/backend/executor/nodeBitmapHeapscan.c
+++ b/src/backend/executor/nodeBitmapHeapscan.c
@@ -79,7 +79,6 @@ typedef enum
 /* ----------------
  *	 ParallelBitmapHeapState information
  *		tbmiterator				iterator for scanning current pages
- *		mutex					mutual exclusion for state
  *		state					current state of the TIDBitmap
  *		cv						conditional wait variable
  * ----------------
@@ -87,8 +86,7 @@ typedef enum
 typedef struct ParallelBitmapHeapState
 {
 	dsa_pointer tbmiterator;
-	slock_t		mutex;
-	SharedBitmapState state;
+	pg_atomic_uint32 state;
 	ConditionVariable cv;
 } ParallelBitmapHeapState;
 
@@ -228,9 +226,7 @@ BitmapHeapNext(BitmapHeapScanState *node)
 static inline void
 BitmapDoneInitializingSharedState(ParallelBitmapHeapState *pstate)
 {
-	SpinLockAcquire(&pstate->mutex);
-	pstate->state = BM_FINISHED;
-	SpinLockRelease(&pstate->mutex);
+	pg_atomic_write_membarrier_u32(&pstate->state, BM_FINISHED);
 	ConditionVariableBroadcast(&pstate->cv);
 }
 
@@ -476,15 +472,12 @@ ExecInitBitmapHeapScan(BitmapHeapScan *node, EState *estate, int eflags)
 static bool
 BitmapShouldInitializeSharedState(ParallelBitmapHeapState *pstate)
 {
-	SharedBitmapState state;
+	uint32		state;
 
 	while (1)
 	{
-		SpinLockAcquire(&pstate->mutex);
-		state = pstate->state;
-		if (pstate->state == BM_INITIAL)
-			pstate->state = BM_INPROGRESS;
-		SpinLockRelease(&pstate->mutex);
+		state = BM_INITIAL;
+		pg_atomic_compare_exchange_u32(&pstate->state, &state, BM_INPROGRESS);
 
 		/* Exit if bitmap is done, or if we're the leader. */
 		if (state != BM_INPROGRESS)
@@ -538,9 +531,7 @@ ExecBitmapHeapInitializeDSM(BitmapHeapScanState *node,
 
 	pstate->tbmiterator = 0;
 
-	/* Initialize the mutex */
-	SpinLockInit(&pstate->mutex);
-	pstate->state = BM_INITIAL;
+	pg_atomic_init_u32(&pstate->state, BM_INITIAL);
 
 	ConditionVariableInit(&pstate->cv);
 
@@ -565,7 +556,7 @@ ExecBitmapHeapReInitializeDSM(BitmapHeapScanState *node,
 	if (dsa == NULL)
 		return;
 
-	pstate->state = BM_INITIAL;
+	pg_atomic_write_u32(&pstate->state, BM_INITIAL);
 
 	if (DsaPointerIsValid(pstate->tbmiterator))
 		tbm_free_shared_area(dsa, pstate->tbmiterator);
-- 
2.50.1 (Apple Git-155)


--Xf36GNcW+0xZNily
Content-Type: text/plain; charset=us-ascii
Content-Disposition: attachment;
	filename=v2-0003-convert-FixedParallelState-last_xlog_end-to-an-at.patch



^ permalink  raw  reply  [nested|flat] 440+ messages in thread

* [PATCH v1 2/8] convert ParallelBitmapHeapState->state to an atomic
@ 2026-07-09 18:38 Nathan Bossart <nathan@postgresql.org>
  0 siblings, 0 replies; 440+ messages in thread

From: Nathan Bossart @ 2026-07-09 18:38 UTC (permalink / raw)

---
 src/backend/executor/nodeBitmapHeapscan.c | 21 ++++++---------------
 1 file changed, 6 insertions(+), 15 deletions(-)

diff --git a/src/backend/executor/nodeBitmapHeapscan.c b/src/backend/executor/nodeBitmapHeapscan.c
index 83d6478bc2b..f2bb487bf10 100644
--- a/src/backend/executor/nodeBitmapHeapscan.c
+++ b/src/backend/executor/nodeBitmapHeapscan.c
@@ -79,7 +79,6 @@ typedef enum
 /* ----------------
  *	 ParallelBitmapHeapState information
  *		tbmiterator				iterator for scanning current pages
- *		mutex					mutual exclusion for state
  *		state					current state of the TIDBitmap
  *		cv						conditional wait variable
  * ----------------
@@ -87,8 +86,7 @@ typedef enum
 typedef struct ParallelBitmapHeapState
 {
 	dsa_pointer tbmiterator;
-	slock_t		mutex;
-	SharedBitmapState state;
+	pg_atomic_uint32 state;
 	ConditionVariable cv;
 } ParallelBitmapHeapState;
 
@@ -228,9 +226,7 @@ BitmapHeapNext(BitmapHeapScanState *node)
 static inline void
 BitmapDoneInitializingSharedState(ParallelBitmapHeapState *pstate)
 {
-	SpinLockAcquire(&pstate->mutex);
-	pstate->state = BM_FINISHED;
-	SpinLockRelease(&pstate->mutex);
+	pg_atomic_write_membarrier_u32(&pstate->state, BM_FINISHED);
 	ConditionVariableBroadcast(&pstate->cv);
 }
 
@@ -480,11 +476,8 @@ BitmapShouldInitializeSharedState(ParallelBitmapHeapState *pstate)
 
 	while (1)
 	{
-		SpinLockAcquire(&pstate->mutex);
-		state = pstate->state;
-		if (pstate->state == BM_INITIAL)
-			pstate->state = BM_INPROGRESS;
-		SpinLockRelease(&pstate->mutex);
+		state = BM_INITIAL;
+		pg_atomic_compare_exchange_u32(&pstate->state, &state, BM_INPROGRESS);
 
 		/* Exit if bitmap is done, or if we're the leader. */
 		if (state != BM_INPROGRESS)
@@ -538,9 +531,7 @@ ExecBitmapHeapInitializeDSM(BitmapHeapScanState *node,
 
 	pstate->tbmiterator = 0;
 
-	/* Initialize the mutex */
-	SpinLockInit(&pstate->mutex);
-	pstate->state = BM_INITIAL;
+	pg_atomic_init_u32(&pstate->state, BM_INITIAL);
 
 	ConditionVariableInit(&pstate->cv);
 
@@ -565,7 +556,7 @@ ExecBitmapHeapReInitializeDSM(BitmapHeapScanState *node,
 	if (dsa == NULL)
 		return;
 
-	pstate->state = BM_INITIAL;
+	pg_atomic_write_u32(&pstate->state, BM_INITIAL);
 
 	if (DsaPointerIsValid(pstate->tbmiterator))
 		tbm_free_shared_area(dsa, pstate->tbmiterator);
-- 
2.50.1 (Apple Git-155)


--Ot5x3ffkWEuxilWO
Content-Type: text/plain; charset=us-ascii
Content-Disposition: attachment;
	filename=v1-0003-convert-FixedParallelState-last_xlog_end-to-an-at.patch



^ permalink  raw  reply  [nested|flat] 440+ messages in thread

* [PATCH v2 2/9] convert ParallelBitmapHeapState->state to an atomic
@ 2026-07-09 18:38 Nathan Bossart <nathan@postgresql.org>
  0 siblings, 0 replies; 440+ messages in thread

From: Nathan Bossart @ 2026-07-09 18:38 UTC (permalink / raw)

---
 src/backend/executor/nodeBitmapHeapscan.c | 23 +++++++----------------
 1 file changed, 7 insertions(+), 16 deletions(-)

diff --git a/src/backend/executor/nodeBitmapHeapscan.c b/src/backend/executor/nodeBitmapHeapscan.c
index 83d6478bc2b..a9e83f30687 100644
--- a/src/backend/executor/nodeBitmapHeapscan.c
+++ b/src/backend/executor/nodeBitmapHeapscan.c
@@ -79,7 +79,6 @@ typedef enum
 /* ----------------
  *	 ParallelBitmapHeapState information
  *		tbmiterator				iterator for scanning current pages
- *		mutex					mutual exclusion for state
  *		state					current state of the TIDBitmap
  *		cv						conditional wait variable
  * ----------------
@@ -87,8 +86,7 @@ typedef enum
 typedef struct ParallelBitmapHeapState
 {
 	dsa_pointer tbmiterator;
-	slock_t		mutex;
-	SharedBitmapState state;
+	pg_atomic_uint32 state;
 	ConditionVariable cv;
 } ParallelBitmapHeapState;
 
@@ -228,9 +226,7 @@ BitmapHeapNext(BitmapHeapScanState *node)
 static inline void
 BitmapDoneInitializingSharedState(ParallelBitmapHeapState *pstate)
 {
-	SpinLockAcquire(&pstate->mutex);
-	pstate->state = BM_FINISHED;
-	SpinLockRelease(&pstate->mutex);
+	pg_atomic_write_membarrier_u32(&pstate->state, BM_FINISHED);
 	ConditionVariableBroadcast(&pstate->cv);
 }
 
@@ -476,15 +472,12 @@ ExecInitBitmapHeapScan(BitmapHeapScan *node, EState *estate, int eflags)
 static bool
 BitmapShouldInitializeSharedState(ParallelBitmapHeapState *pstate)
 {
-	SharedBitmapState state;
+	uint32		state;
 
 	while (1)
 	{
-		SpinLockAcquire(&pstate->mutex);
-		state = pstate->state;
-		if (pstate->state == BM_INITIAL)
-			pstate->state = BM_INPROGRESS;
-		SpinLockRelease(&pstate->mutex);
+		state = BM_INITIAL;
+		pg_atomic_compare_exchange_u32(&pstate->state, &state, BM_INPROGRESS);
 
 		/* Exit if bitmap is done, or if we're the leader. */
 		if (state != BM_INPROGRESS)
@@ -538,9 +531,7 @@ ExecBitmapHeapInitializeDSM(BitmapHeapScanState *node,
 
 	pstate->tbmiterator = 0;
 
-	/* Initialize the mutex */
-	SpinLockInit(&pstate->mutex);
-	pstate->state = BM_INITIAL;
+	pg_atomic_init_u32(&pstate->state, BM_INITIAL);
 
 	ConditionVariableInit(&pstate->cv);
 
@@ -565,7 +556,7 @@ ExecBitmapHeapReInitializeDSM(BitmapHeapScanState *node,
 	if (dsa == NULL)
 		return;
 
-	pstate->state = BM_INITIAL;
+	pg_atomic_write_u32(&pstate->state, BM_INITIAL);
 
 	if (DsaPointerIsValid(pstate->tbmiterator))
 		tbm_free_shared_area(dsa, pstate->tbmiterator);
-- 
2.50.1 (Apple Git-155)


--Xf36GNcW+0xZNily
Content-Type: text/plain; charset=us-ascii
Content-Disposition: attachment;
	filename=v2-0003-convert-FixedParallelState-last_xlog_end-to-an-at.patch



^ permalink  raw  reply  [nested|flat] 440+ messages in thread

* [PATCH v1 2/8] convert ParallelBitmapHeapState->state to an atomic
@ 2026-07-09 18:38 Nathan Bossart <nathan@postgresql.org>
  0 siblings, 0 replies; 440+ messages in thread

From: Nathan Bossart @ 2026-07-09 18:38 UTC (permalink / raw)

---
 src/backend/executor/nodeBitmapHeapscan.c | 21 ++++++---------------
 1 file changed, 6 insertions(+), 15 deletions(-)

diff --git a/src/backend/executor/nodeBitmapHeapscan.c b/src/backend/executor/nodeBitmapHeapscan.c
index 83d6478bc2b..f2bb487bf10 100644
--- a/src/backend/executor/nodeBitmapHeapscan.c
+++ b/src/backend/executor/nodeBitmapHeapscan.c
@@ -79,7 +79,6 @@ typedef enum
 /* ----------------
  *	 ParallelBitmapHeapState information
  *		tbmiterator				iterator for scanning current pages
- *		mutex					mutual exclusion for state
  *		state					current state of the TIDBitmap
  *		cv						conditional wait variable
  * ----------------
@@ -87,8 +86,7 @@ typedef enum
 typedef struct ParallelBitmapHeapState
 {
 	dsa_pointer tbmiterator;
-	slock_t		mutex;
-	SharedBitmapState state;
+	pg_atomic_uint32 state;
 	ConditionVariable cv;
 } ParallelBitmapHeapState;
 
@@ -228,9 +226,7 @@ BitmapHeapNext(BitmapHeapScanState *node)
 static inline void
 BitmapDoneInitializingSharedState(ParallelBitmapHeapState *pstate)
 {
-	SpinLockAcquire(&pstate->mutex);
-	pstate->state = BM_FINISHED;
-	SpinLockRelease(&pstate->mutex);
+	pg_atomic_write_membarrier_u32(&pstate->state, BM_FINISHED);
 	ConditionVariableBroadcast(&pstate->cv);
 }
 
@@ -480,11 +476,8 @@ BitmapShouldInitializeSharedState(ParallelBitmapHeapState *pstate)
 
 	while (1)
 	{
-		SpinLockAcquire(&pstate->mutex);
-		state = pstate->state;
-		if (pstate->state == BM_INITIAL)
-			pstate->state = BM_INPROGRESS;
-		SpinLockRelease(&pstate->mutex);
+		state = BM_INITIAL;
+		pg_atomic_compare_exchange_u32(&pstate->state, &state, BM_INPROGRESS);
 
 		/* Exit if bitmap is done, or if we're the leader. */
 		if (state != BM_INPROGRESS)
@@ -538,9 +531,7 @@ ExecBitmapHeapInitializeDSM(BitmapHeapScanState *node,
 
 	pstate->tbmiterator = 0;
 
-	/* Initialize the mutex */
-	SpinLockInit(&pstate->mutex);
-	pstate->state = BM_INITIAL;
+	pg_atomic_init_u32(&pstate->state, BM_INITIAL);
 
 	ConditionVariableInit(&pstate->cv);
 
@@ -565,7 +556,7 @@ ExecBitmapHeapReInitializeDSM(BitmapHeapScanState *node,
 	if (dsa == NULL)
 		return;
 
-	pstate->state = BM_INITIAL;
+	pg_atomic_write_u32(&pstate->state, BM_INITIAL);
 
 	if (DsaPointerIsValid(pstate->tbmiterator))
 		tbm_free_shared_area(dsa, pstate->tbmiterator);
-- 
2.50.1 (Apple Git-155)


--Ot5x3ffkWEuxilWO
Content-Type: text/plain; charset=us-ascii
Content-Disposition: attachment;
	filename=v1-0003-convert-FixedParallelState-last_xlog_end-to-an-at.patch



^ permalink  raw  reply  [nested|flat] 440+ messages in thread

* [PATCH v1 2/8] convert ParallelBitmapHeapState->state to an atomic
@ 2026-07-09 18:38 Nathan Bossart <nathan@postgresql.org>
  0 siblings, 0 replies; 440+ messages in thread

From: Nathan Bossart @ 2026-07-09 18:38 UTC (permalink / raw)

---
 src/backend/executor/nodeBitmapHeapscan.c | 21 ++++++---------------
 1 file changed, 6 insertions(+), 15 deletions(-)

diff --git a/src/backend/executor/nodeBitmapHeapscan.c b/src/backend/executor/nodeBitmapHeapscan.c
index 83d6478bc2b..f2bb487bf10 100644
--- a/src/backend/executor/nodeBitmapHeapscan.c
+++ b/src/backend/executor/nodeBitmapHeapscan.c
@@ -79,7 +79,6 @@ typedef enum
 /* ----------------
  *	 ParallelBitmapHeapState information
  *		tbmiterator				iterator for scanning current pages
- *		mutex					mutual exclusion for state
  *		state					current state of the TIDBitmap
  *		cv						conditional wait variable
  * ----------------
@@ -87,8 +86,7 @@ typedef enum
 typedef struct ParallelBitmapHeapState
 {
 	dsa_pointer tbmiterator;
-	slock_t		mutex;
-	SharedBitmapState state;
+	pg_atomic_uint32 state;
 	ConditionVariable cv;
 } ParallelBitmapHeapState;
 
@@ -228,9 +226,7 @@ BitmapHeapNext(BitmapHeapScanState *node)
 static inline void
 BitmapDoneInitializingSharedState(ParallelBitmapHeapState *pstate)
 {
-	SpinLockAcquire(&pstate->mutex);
-	pstate->state = BM_FINISHED;
-	SpinLockRelease(&pstate->mutex);
+	pg_atomic_write_membarrier_u32(&pstate->state, BM_FINISHED);
 	ConditionVariableBroadcast(&pstate->cv);
 }
 
@@ -480,11 +476,8 @@ BitmapShouldInitializeSharedState(ParallelBitmapHeapState *pstate)
 
 	while (1)
 	{
-		SpinLockAcquire(&pstate->mutex);
-		state = pstate->state;
-		if (pstate->state == BM_INITIAL)
-			pstate->state = BM_INPROGRESS;
-		SpinLockRelease(&pstate->mutex);
+		state = BM_INITIAL;
+		pg_atomic_compare_exchange_u32(&pstate->state, &state, BM_INPROGRESS);
 
 		/* Exit if bitmap is done, or if we're the leader. */
 		if (state != BM_INPROGRESS)
@@ -538,9 +531,7 @@ ExecBitmapHeapInitializeDSM(BitmapHeapScanState *node,
 
 	pstate->tbmiterator = 0;
 
-	/* Initialize the mutex */
-	SpinLockInit(&pstate->mutex);
-	pstate->state = BM_INITIAL;
+	pg_atomic_init_u32(&pstate->state, BM_INITIAL);
 
 	ConditionVariableInit(&pstate->cv);
 
@@ -565,7 +556,7 @@ ExecBitmapHeapReInitializeDSM(BitmapHeapScanState *node,
 	if (dsa == NULL)
 		return;
 
-	pstate->state = BM_INITIAL;
+	pg_atomic_write_u32(&pstate->state, BM_INITIAL);
 
 	if (DsaPointerIsValid(pstate->tbmiterator))
 		tbm_free_shared_area(dsa, pstate->tbmiterator);
-- 
2.50.1 (Apple Git-155)


--Ot5x3ffkWEuxilWO
Content-Type: text/plain; charset=us-ascii
Content-Disposition: attachment;
	filename=v1-0003-convert-FixedParallelState-last_xlog_end-to-an-at.patch



^ permalink  raw  reply  [nested|flat] 440+ messages in thread

* [PATCH v1 2/8] convert ParallelBitmapHeapState->state to an atomic
@ 2026-07-09 18:38 Nathan Bossart <nathan@postgresql.org>
  0 siblings, 0 replies; 440+ messages in thread

From: Nathan Bossart @ 2026-07-09 18:38 UTC (permalink / raw)

---
 src/backend/executor/nodeBitmapHeapscan.c | 21 ++++++---------------
 1 file changed, 6 insertions(+), 15 deletions(-)

diff --git a/src/backend/executor/nodeBitmapHeapscan.c b/src/backend/executor/nodeBitmapHeapscan.c
index 83d6478bc2b..f2bb487bf10 100644
--- a/src/backend/executor/nodeBitmapHeapscan.c
+++ b/src/backend/executor/nodeBitmapHeapscan.c
@@ -79,7 +79,6 @@ typedef enum
 /* ----------------
  *	 ParallelBitmapHeapState information
  *		tbmiterator				iterator for scanning current pages
- *		mutex					mutual exclusion for state
  *		state					current state of the TIDBitmap
  *		cv						conditional wait variable
  * ----------------
@@ -87,8 +86,7 @@ typedef enum
 typedef struct ParallelBitmapHeapState
 {
 	dsa_pointer tbmiterator;
-	slock_t		mutex;
-	SharedBitmapState state;
+	pg_atomic_uint32 state;
 	ConditionVariable cv;
 } ParallelBitmapHeapState;
 
@@ -228,9 +226,7 @@ BitmapHeapNext(BitmapHeapScanState *node)
 static inline void
 BitmapDoneInitializingSharedState(ParallelBitmapHeapState *pstate)
 {
-	SpinLockAcquire(&pstate->mutex);
-	pstate->state = BM_FINISHED;
-	SpinLockRelease(&pstate->mutex);
+	pg_atomic_write_membarrier_u32(&pstate->state, BM_FINISHED);
 	ConditionVariableBroadcast(&pstate->cv);
 }
 
@@ -480,11 +476,8 @@ BitmapShouldInitializeSharedState(ParallelBitmapHeapState *pstate)
 
 	while (1)
 	{
-		SpinLockAcquire(&pstate->mutex);
-		state = pstate->state;
-		if (pstate->state == BM_INITIAL)
-			pstate->state = BM_INPROGRESS;
-		SpinLockRelease(&pstate->mutex);
+		state = BM_INITIAL;
+		pg_atomic_compare_exchange_u32(&pstate->state, &state, BM_INPROGRESS);
 
 		/* Exit if bitmap is done, or if we're the leader. */
 		if (state != BM_INPROGRESS)
@@ -538,9 +531,7 @@ ExecBitmapHeapInitializeDSM(BitmapHeapScanState *node,
 
 	pstate->tbmiterator = 0;
 
-	/* Initialize the mutex */
-	SpinLockInit(&pstate->mutex);
-	pstate->state = BM_INITIAL;
+	pg_atomic_init_u32(&pstate->state, BM_INITIAL);
 
 	ConditionVariableInit(&pstate->cv);
 
@@ -565,7 +556,7 @@ ExecBitmapHeapReInitializeDSM(BitmapHeapScanState *node,
 	if (dsa == NULL)
 		return;
 
-	pstate->state = BM_INITIAL;
+	pg_atomic_write_u32(&pstate->state, BM_INITIAL);
 
 	if (DsaPointerIsValid(pstate->tbmiterator))
 		tbm_free_shared_area(dsa, pstate->tbmiterator);
-- 
2.50.1 (Apple Git-155)


--Ot5x3ffkWEuxilWO
Content-Type: text/plain; charset=us-ascii
Content-Disposition: attachment;
	filename=v1-0003-convert-FixedParallelState-last_xlog_end-to-an-at.patch



^ permalink  raw  reply  [nested|flat] 440+ messages in thread

* [PATCH v1 2/8] convert ParallelBitmapHeapState->state to an atomic
@ 2026-07-09 18:38 Nathan Bossart <nathan@postgresql.org>
  0 siblings, 0 replies; 440+ messages in thread

From: Nathan Bossart @ 2026-07-09 18:38 UTC (permalink / raw)

---
 src/backend/executor/nodeBitmapHeapscan.c | 21 ++++++---------------
 1 file changed, 6 insertions(+), 15 deletions(-)

diff --git a/src/backend/executor/nodeBitmapHeapscan.c b/src/backend/executor/nodeBitmapHeapscan.c
index 83d6478bc2b..f2bb487bf10 100644
--- a/src/backend/executor/nodeBitmapHeapscan.c
+++ b/src/backend/executor/nodeBitmapHeapscan.c
@@ -79,7 +79,6 @@ typedef enum
 /* ----------------
  *	 ParallelBitmapHeapState information
  *		tbmiterator				iterator for scanning current pages
- *		mutex					mutual exclusion for state
  *		state					current state of the TIDBitmap
  *		cv						conditional wait variable
  * ----------------
@@ -87,8 +86,7 @@ typedef enum
 typedef struct ParallelBitmapHeapState
 {
 	dsa_pointer tbmiterator;
-	slock_t		mutex;
-	SharedBitmapState state;
+	pg_atomic_uint32 state;
 	ConditionVariable cv;
 } ParallelBitmapHeapState;
 
@@ -228,9 +226,7 @@ BitmapHeapNext(BitmapHeapScanState *node)
 static inline void
 BitmapDoneInitializingSharedState(ParallelBitmapHeapState *pstate)
 {
-	SpinLockAcquire(&pstate->mutex);
-	pstate->state = BM_FINISHED;
-	SpinLockRelease(&pstate->mutex);
+	pg_atomic_write_membarrier_u32(&pstate->state, BM_FINISHED);
 	ConditionVariableBroadcast(&pstate->cv);
 }
 
@@ -480,11 +476,8 @@ BitmapShouldInitializeSharedState(ParallelBitmapHeapState *pstate)
 
 	while (1)
 	{
-		SpinLockAcquire(&pstate->mutex);
-		state = pstate->state;
-		if (pstate->state == BM_INITIAL)
-			pstate->state = BM_INPROGRESS;
-		SpinLockRelease(&pstate->mutex);
+		state = BM_INITIAL;
+		pg_atomic_compare_exchange_u32(&pstate->state, &state, BM_INPROGRESS);
 
 		/* Exit if bitmap is done, or if we're the leader. */
 		if (state != BM_INPROGRESS)
@@ -538,9 +531,7 @@ ExecBitmapHeapInitializeDSM(BitmapHeapScanState *node,
 
 	pstate->tbmiterator = 0;
 
-	/* Initialize the mutex */
-	SpinLockInit(&pstate->mutex);
-	pstate->state = BM_INITIAL;
+	pg_atomic_init_u32(&pstate->state, BM_INITIAL);
 
 	ConditionVariableInit(&pstate->cv);
 
@@ -565,7 +556,7 @@ ExecBitmapHeapReInitializeDSM(BitmapHeapScanState *node,
 	if (dsa == NULL)
 		return;
 
-	pstate->state = BM_INITIAL;
+	pg_atomic_write_u32(&pstate->state, BM_INITIAL);
 
 	if (DsaPointerIsValid(pstate->tbmiterator))
 		tbm_free_shared_area(dsa, pstate->tbmiterator);
-- 
2.50.1 (Apple Git-155)


--Ot5x3ffkWEuxilWO
Content-Type: text/plain; charset=us-ascii
Content-Disposition: attachment;
	filename=v1-0003-convert-FixedParallelState-last_xlog_end-to-an-at.patch



^ permalink  raw  reply  [nested|flat] 440+ messages in thread

* [PATCH v1 2/8] convert ParallelBitmapHeapState->state to an atomic
@ 2026-07-09 18:38 Nathan Bossart <nathan@postgresql.org>
  0 siblings, 0 replies; 440+ messages in thread

From: Nathan Bossart @ 2026-07-09 18:38 UTC (permalink / raw)

---
 src/backend/executor/nodeBitmapHeapscan.c | 21 ++++++---------------
 1 file changed, 6 insertions(+), 15 deletions(-)

diff --git a/src/backend/executor/nodeBitmapHeapscan.c b/src/backend/executor/nodeBitmapHeapscan.c
index 83d6478bc2b..f2bb487bf10 100644
--- a/src/backend/executor/nodeBitmapHeapscan.c
+++ b/src/backend/executor/nodeBitmapHeapscan.c
@@ -79,7 +79,6 @@ typedef enum
 /* ----------------
  *	 ParallelBitmapHeapState information
  *		tbmiterator				iterator for scanning current pages
- *		mutex					mutual exclusion for state
  *		state					current state of the TIDBitmap
  *		cv						conditional wait variable
  * ----------------
@@ -87,8 +86,7 @@ typedef enum
 typedef struct ParallelBitmapHeapState
 {
 	dsa_pointer tbmiterator;
-	slock_t		mutex;
-	SharedBitmapState state;
+	pg_atomic_uint32 state;
 	ConditionVariable cv;
 } ParallelBitmapHeapState;
 
@@ -228,9 +226,7 @@ BitmapHeapNext(BitmapHeapScanState *node)
 static inline void
 BitmapDoneInitializingSharedState(ParallelBitmapHeapState *pstate)
 {
-	SpinLockAcquire(&pstate->mutex);
-	pstate->state = BM_FINISHED;
-	SpinLockRelease(&pstate->mutex);
+	pg_atomic_write_membarrier_u32(&pstate->state, BM_FINISHED);
 	ConditionVariableBroadcast(&pstate->cv);
 }
 
@@ -480,11 +476,8 @@ BitmapShouldInitializeSharedState(ParallelBitmapHeapState *pstate)
 
 	while (1)
 	{
-		SpinLockAcquire(&pstate->mutex);
-		state = pstate->state;
-		if (pstate->state == BM_INITIAL)
-			pstate->state = BM_INPROGRESS;
-		SpinLockRelease(&pstate->mutex);
+		state = BM_INITIAL;
+		pg_atomic_compare_exchange_u32(&pstate->state, &state, BM_INPROGRESS);
 
 		/* Exit if bitmap is done, or if we're the leader. */
 		if (state != BM_INPROGRESS)
@@ -538,9 +531,7 @@ ExecBitmapHeapInitializeDSM(BitmapHeapScanState *node,
 
 	pstate->tbmiterator = 0;
 
-	/* Initialize the mutex */
-	SpinLockInit(&pstate->mutex);
-	pstate->state = BM_INITIAL;
+	pg_atomic_init_u32(&pstate->state, BM_INITIAL);
 
 	ConditionVariableInit(&pstate->cv);
 
@@ -565,7 +556,7 @@ ExecBitmapHeapReInitializeDSM(BitmapHeapScanState *node,
 	if (dsa == NULL)
 		return;
 
-	pstate->state = BM_INITIAL;
+	pg_atomic_write_u32(&pstate->state, BM_INITIAL);
 
 	if (DsaPointerIsValid(pstate->tbmiterator))
 		tbm_free_shared_area(dsa, pstate->tbmiterator);
-- 
2.50.1 (Apple Git-155)


--Ot5x3ffkWEuxilWO
Content-Type: text/plain; charset=us-ascii
Content-Disposition: attachment;
	filename=v1-0003-convert-FixedParallelState-last_xlog_end-to-an-at.patch



^ permalink  raw  reply  [nested|flat] 440+ messages in thread

* [PATCH v1 2/8] convert ParallelBitmapHeapState->state to an atomic
@ 2026-07-09 18:38 Nathan Bossart <nathan@postgresql.org>
  0 siblings, 0 replies; 440+ messages in thread

From: Nathan Bossart @ 2026-07-09 18:38 UTC (permalink / raw)

---
 src/backend/executor/nodeBitmapHeapscan.c | 21 ++++++---------------
 1 file changed, 6 insertions(+), 15 deletions(-)

diff --git a/src/backend/executor/nodeBitmapHeapscan.c b/src/backend/executor/nodeBitmapHeapscan.c
index 83d6478bc2b..f2bb487bf10 100644
--- a/src/backend/executor/nodeBitmapHeapscan.c
+++ b/src/backend/executor/nodeBitmapHeapscan.c
@@ -79,7 +79,6 @@ typedef enum
 /* ----------------
  *	 ParallelBitmapHeapState information
  *		tbmiterator				iterator for scanning current pages
- *		mutex					mutual exclusion for state
  *		state					current state of the TIDBitmap
  *		cv						conditional wait variable
  * ----------------
@@ -87,8 +86,7 @@ typedef enum
 typedef struct ParallelBitmapHeapState
 {
 	dsa_pointer tbmiterator;
-	slock_t		mutex;
-	SharedBitmapState state;
+	pg_atomic_uint32 state;
 	ConditionVariable cv;
 } ParallelBitmapHeapState;
 
@@ -228,9 +226,7 @@ BitmapHeapNext(BitmapHeapScanState *node)
 static inline void
 BitmapDoneInitializingSharedState(ParallelBitmapHeapState *pstate)
 {
-	SpinLockAcquire(&pstate->mutex);
-	pstate->state = BM_FINISHED;
-	SpinLockRelease(&pstate->mutex);
+	pg_atomic_write_membarrier_u32(&pstate->state, BM_FINISHED);
 	ConditionVariableBroadcast(&pstate->cv);
 }
 
@@ -480,11 +476,8 @@ BitmapShouldInitializeSharedState(ParallelBitmapHeapState *pstate)
 
 	while (1)
 	{
-		SpinLockAcquire(&pstate->mutex);
-		state = pstate->state;
-		if (pstate->state == BM_INITIAL)
-			pstate->state = BM_INPROGRESS;
-		SpinLockRelease(&pstate->mutex);
+		state = BM_INITIAL;
+		pg_atomic_compare_exchange_u32(&pstate->state, &state, BM_INPROGRESS);
 
 		/* Exit if bitmap is done, or if we're the leader. */
 		if (state != BM_INPROGRESS)
@@ -538,9 +531,7 @@ ExecBitmapHeapInitializeDSM(BitmapHeapScanState *node,
 
 	pstate->tbmiterator = 0;
 
-	/* Initialize the mutex */
-	SpinLockInit(&pstate->mutex);
-	pstate->state = BM_INITIAL;
+	pg_atomic_init_u32(&pstate->state, BM_INITIAL);
 
 	ConditionVariableInit(&pstate->cv);
 
@@ -565,7 +556,7 @@ ExecBitmapHeapReInitializeDSM(BitmapHeapScanState *node,
 	if (dsa == NULL)
 		return;
 
-	pstate->state = BM_INITIAL;
+	pg_atomic_write_u32(&pstate->state, BM_INITIAL);
 
 	if (DsaPointerIsValid(pstate->tbmiterator))
 		tbm_free_shared_area(dsa, pstate->tbmiterator);
-- 
2.50.1 (Apple Git-155)


--Ot5x3ffkWEuxilWO
Content-Type: text/plain; charset=us-ascii
Content-Disposition: attachment;
	filename=v1-0003-convert-FixedParallelState-last_xlog_end-to-an-at.patch



^ permalink  raw  reply  [nested|flat] 440+ messages in thread

* [PATCH v1 2/8] convert ParallelBitmapHeapState->state to an atomic
@ 2026-07-09 18:38 Nathan Bossart <nathan@postgresql.org>
  0 siblings, 0 replies; 440+ messages in thread

From: Nathan Bossart @ 2026-07-09 18:38 UTC (permalink / raw)

---
 src/backend/executor/nodeBitmapHeapscan.c | 21 ++++++---------------
 1 file changed, 6 insertions(+), 15 deletions(-)

diff --git a/src/backend/executor/nodeBitmapHeapscan.c b/src/backend/executor/nodeBitmapHeapscan.c
index 83d6478bc2b..f2bb487bf10 100644
--- a/src/backend/executor/nodeBitmapHeapscan.c
+++ b/src/backend/executor/nodeBitmapHeapscan.c
@@ -79,7 +79,6 @@ typedef enum
 /* ----------------
  *	 ParallelBitmapHeapState information
  *		tbmiterator				iterator for scanning current pages
- *		mutex					mutual exclusion for state
  *		state					current state of the TIDBitmap
  *		cv						conditional wait variable
  * ----------------
@@ -87,8 +86,7 @@ typedef enum
 typedef struct ParallelBitmapHeapState
 {
 	dsa_pointer tbmiterator;
-	slock_t		mutex;
-	SharedBitmapState state;
+	pg_atomic_uint32 state;
 	ConditionVariable cv;
 } ParallelBitmapHeapState;
 
@@ -228,9 +226,7 @@ BitmapHeapNext(BitmapHeapScanState *node)
 static inline void
 BitmapDoneInitializingSharedState(ParallelBitmapHeapState *pstate)
 {
-	SpinLockAcquire(&pstate->mutex);
-	pstate->state = BM_FINISHED;
-	SpinLockRelease(&pstate->mutex);
+	pg_atomic_write_membarrier_u32(&pstate->state, BM_FINISHED);
 	ConditionVariableBroadcast(&pstate->cv);
 }
 
@@ -480,11 +476,8 @@ BitmapShouldInitializeSharedState(ParallelBitmapHeapState *pstate)
 
 	while (1)
 	{
-		SpinLockAcquire(&pstate->mutex);
-		state = pstate->state;
-		if (pstate->state == BM_INITIAL)
-			pstate->state = BM_INPROGRESS;
-		SpinLockRelease(&pstate->mutex);
+		state = BM_INITIAL;
+		pg_atomic_compare_exchange_u32(&pstate->state, &state, BM_INPROGRESS);
 
 		/* Exit if bitmap is done, or if we're the leader. */
 		if (state != BM_INPROGRESS)
@@ -538,9 +531,7 @@ ExecBitmapHeapInitializeDSM(BitmapHeapScanState *node,
 
 	pstate->tbmiterator = 0;
 
-	/* Initialize the mutex */
-	SpinLockInit(&pstate->mutex);
-	pstate->state = BM_INITIAL;
+	pg_atomic_init_u32(&pstate->state, BM_INITIAL);
 
 	ConditionVariableInit(&pstate->cv);
 
@@ -565,7 +556,7 @@ ExecBitmapHeapReInitializeDSM(BitmapHeapScanState *node,
 	if (dsa == NULL)
 		return;
 
-	pstate->state = BM_INITIAL;
+	pg_atomic_write_u32(&pstate->state, BM_INITIAL);
 
 	if (DsaPointerIsValid(pstate->tbmiterator))
 		tbm_free_shared_area(dsa, pstate->tbmiterator);
-- 
2.50.1 (Apple Git-155)


--Ot5x3ffkWEuxilWO
Content-Type: text/plain; charset=us-ascii
Content-Disposition: attachment;
	filename=v1-0003-convert-FixedParallelState-last_xlog_end-to-an-at.patch



^ permalink  raw  reply  [nested|flat] 440+ messages in thread

* [PATCH v1 2/8] convert ParallelBitmapHeapState->state to an atomic
@ 2026-07-09 18:38 Nathan Bossart <nathan@postgresql.org>
  0 siblings, 0 replies; 440+ messages in thread

From: Nathan Bossart @ 2026-07-09 18:38 UTC (permalink / raw)

---
 src/backend/executor/nodeBitmapHeapscan.c | 21 ++++++---------------
 1 file changed, 6 insertions(+), 15 deletions(-)

diff --git a/src/backend/executor/nodeBitmapHeapscan.c b/src/backend/executor/nodeBitmapHeapscan.c
index 83d6478bc2b..f2bb487bf10 100644
--- a/src/backend/executor/nodeBitmapHeapscan.c
+++ b/src/backend/executor/nodeBitmapHeapscan.c
@@ -79,7 +79,6 @@ typedef enum
 /* ----------------
  *	 ParallelBitmapHeapState information
  *		tbmiterator				iterator for scanning current pages
- *		mutex					mutual exclusion for state
  *		state					current state of the TIDBitmap
  *		cv						conditional wait variable
  * ----------------
@@ -87,8 +86,7 @@ typedef enum
 typedef struct ParallelBitmapHeapState
 {
 	dsa_pointer tbmiterator;
-	slock_t		mutex;
-	SharedBitmapState state;
+	pg_atomic_uint32 state;
 	ConditionVariable cv;
 } ParallelBitmapHeapState;
 
@@ -228,9 +226,7 @@ BitmapHeapNext(BitmapHeapScanState *node)
 static inline void
 BitmapDoneInitializingSharedState(ParallelBitmapHeapState *pstate)
 {
-	SpinLockAcquire(&pstate->mutex);
-	pstate->state = BM_FINISHED;
-	SpinLockRelease(&pstate->mutex);
+	pg_atomic_write_membarrier_u32(&pstate->state, BM_FINISHED);
 	ConditionVariableBroadcast(&pstate->cv);
 }
 
@@ -480,11 +476,8 @@ BitmapShouldInitializeSharedState(ParallelBitmapHeapState *pstate)
 
 	while (1)
 	{
-		SpinLockAcquire(&pstate->mutex);
-		state = pstate->state;
-		if (pstate->state == BM_INITIAL)
-			pstate->state = BM_INPROGRESS;
-		SpinLockRelease(&pstate->mutex);
+		state = BM_INITIAL;
+		pg_atomic_compare_exchange_u32(&pstate->state, &state, BM_INPROGRESS);
 
 		/* Exit if bitmap is done, or if we're the leader. */
 		if (state != BM_INPROGRESS)
@@ -538,9 +531,7 @@ ExecBitmapHeapInitializeDSM(BitmapHeapScanState *node,
 
 	pstate->tbmiterator = 0;
 
-	/* Initialize the mutex */
-	SpinLockInit(&pstate->mutex);
-	pstate->state = BM_INITIAL;
+	pg_atomic_init_u32(&pstate->state, BM_INITIAL);
 
 	ConditionVariableInit(&pstate->cv);
 
@@ -565,7 +556,7 @@ ExecBitmapHeapReInitializeDSM(BitmapHeapScanState *node,
 	if (dsa == NULL)
 		return;
 
-	pstate->state = BM_INITIAL;
+	pg_atomic_write_u32(&pstate->state, BM_INITIAL);
 
 	if (DsaPointerIsValid(pstate->tbmiterator))
 		tbm_free_shared_area(dsa, pstate->tbmiterator);
-- 
2.50.1 (Apple Git-155)


--Ot5x3ffkWEuxilWO
Content-Type: text/plain; charset=us-ascii
Content-Disposition: attachment;
	filename=v1-0003-convert-FixedParallelState-last_xlog_end-to-an-at.patch



^ permalink  raw  reply  [nested|flat] 440+ messages in thread

* [PATCH v1 2/8] convert ParallelBitmapHeapState->state to an atomic
@ 2026-07-09 18:38 Nathan Bossart <nathan@postgresql.org>
  0 siblings, 0 replies; 440+ messages in thread

From: Nathan Bossart @ 2026-07-09 18:38 UTC (permalink / raw)

---
 src/backend/executor/nodeBitmapHeapscan.c | 21 ++++++---------------
 1 file changed, 6 insertions(+), 15 deletions(-)

diff --git a/src/backend/executor/nodeBitmapHeapscan.c b/src/backend/executor/nodeBitmapHeapscan.c
index 83d6478bc2b..f2bb487bf10 100644
--- a/src/backend/executor/nodeBitmapHeapscan.c
+++ b/src/backend/executor/nodeBitmapHeapscan.c
@@ -79,7 +79,6 @@ typedef enum
 /* ----------------
  *	 ParallelBitmapHeapState information
  *		tbmiterator				iterator for scanning current pages
- *		mutex					mutual exclusion for state
  *		state					current state of the TIDBitmap
  *		cv						conditional wait variable
  * ----------------
@@ -87,8 +86,7 @@ typedef enum
 typedef struct ParallelBitmapHeapState
 {
 	dsa_pointer tbmiterator;
-	slock_t		mutex;
-	SharedBitmapState state;
+	pg_atomic_uint32 state;
 	ConditionVariable cv;
 } ParallelBitmapHeapState;
 
@@ -228,9 +226,7 @@ BitmapHeapNext(BitmapHeapScanState *node)
 static inline void
 BitmapDoneInitializingSharedState(ParallelBitmapHeapState *pstate)
 {
-	SpinLockAcquire(&pstate->mutex);
-	pstate->state = BM_FINISHED;
-	SpinLockRelease(&pstate->mutex);
+	pg_atomic_write_membarrier_u32(&pstate->state, BM_FINISHED);
 	ConditionVariableBroadcast(&pstate->cv);
 }
 
@@ -480,11 +476,8 @@ BitmapShouldInitializeSharedState(ParallelBitmapHeapState *pstate)
 
 	while (1)
 	{
-		SpinLockAcquire(&pstate->mutex);
-		state = pstate->state;
-		if (pstate->state == BM_INITIAL)
-			pstate->state = BM_INPROGRESS;
-		SpinLockRelease(&pstate->mutex);
+		state = BM_INITIAL;
+		pg_atomic_compare_exchange_u32(&pstate->state, &state, BM_INPROGRESS);
 
 		/* Exit if bitmap is done, or if we're the leader. */
 		if (state != BM_INPROGRESS)
@@ -538,9 +531,7 @@ ExecBitmapHeapInitializeDSM(BitmapHeapScanState *node,
 
 	pstate->tbmiterator = 0;
 
-	/* Initialize the mutex */
-	SpinLockInit(&pstate->mutex);
-	pstate->state = BM_INITIAL;
+	pg_atomic_init_u32(&pstate->state, BM_INITIAL);
 
 	ConditionVariableInit(&pstate->cv);
 
@@ -565,7 +556,7 @@ ExecBitmapHeapReInitializeDSM(BitmapHeapScanState *node,
 	if (dsa == NULL)
 		return;
 
-	pstate->state = BM_INITIAL;
+	pg_atomic_write_u32(&pstate->state, BM_INITIAL);
 
 	if (DsaPointerIsValid(pstate->tbmiterator))
 		tbm_free_shared_area(dsa, pstate->tbmiterator);
-- 
2.50.1 (Apple Git-155)


--Ot5x3ffkWEuxilWO
Content-Type: text/plain; charset=us-ascii
Content-Disposition: attachment;
	filename=v1-0003-convert-FixedParallelState-last_xlog_end-to-an-at.patch



^ permalink  raw  reply  [nested|flat] 440+ messages in thread

* [PATCH v1 2/8] convert ParallelBitmapHeapState->state to an atomic
@ 2026-07-09 18:38 Nathan Bossart <nathan@postgresql.org>
  0 siblings, 0 replies; 440+ messages in thread

From: Nathan Bossart @ 2026-07-09 18:38 UTC (permalink / raw)

---
 src/backend/executor/nodeBitmapHeapscan.c | 21 ++++++---------------
 1 file changed, 6 insertions(+), 15 deletions(-)

diff --git a/src/backend/executor/nodeBitmapHeapscan.c b/src/backend/executor/nodeBitmapHeapscan.c
index 83d6478bc2b..f2bb487bf10 100644
--- a/src/backend/executor/nodeBitmapHeapscan.c
+++ b/src/backend/executor/nodeBitmapHeapscan.c
@@ -79,7 +79,6 @@ typedef enum
 /* ----------------
  *	 ParallelBitmapHeapState information
  *		tbmiterator				iterator for scanning current pages
- *		mutex					mutual exclusion for state
  *		state					current state of the TIDBitmap
  *		cv						conditional wait variable
  * ----------------
@@ -87,8 +86,7 @@ typedef enum
 typedef struct ParallelBitmapHeapState
 {
 	dsa_pointer tbmiterator;
-	slock_t		mutex;
-	SharedBitmapState state;
+	pg_atomic_uint32 state;
 	ConditionVariable cv;
 } ParallelBitmapHeapState;
 
@@ -228,9 +226,7 @@ BitmapHeapNext(BitmapHeapScanState *node)
 static inline void
 BitmapDoneInitializingSharedState(ParallelBitmapHeapState *pstate)
 {
-	SpinLockAcquire(&pstate->mutex);
-	pstate->state = BM_FINISHED;
-	SpinLockRelease(&pstate->mutex);
+	pg_atomic_write_membarrier_u32(&pstate->state, BM_FINISHED);
 	ConditionVariableBroadcast(&pstate->cv);
 }
 
@@ -480,11 +476,8 @@ BitmapShouldInitializeSharedState(ParallelBitmapHeapState *pstate)
 
 	while (1)
 	{
-		SpinLockAcquire(&pstate->mutex);
-		state = pstate->state;
-		if (pstate->state == BM_INITIAL)
-			pstate->state = BM_INPROGRESS;
-		SpinLockRelease(&pstate->mutex);
+		state = BM_INITIAL;
+		pg_atomic_compare_exchange_u32(&pstate->state, &state, BM_INPROGRESS);
 
 		/* Exit if bitmap is done, or if we're the leader. */
 		if (state != BM_INPROGRESS)
@@ -538,9 +531,7 @@ ExecBitmapHeapInitializeDSM(BitmapHeapScanState *node,
 
 	pstate->tbmiterator = 0;
 
-	/* Initialize the mutex */
-	SpinLockInit(&pstate->mutex);
-	pstate->state = BM_INITIAL;
+	pg_atomic_init_u32(&pstate->state, BM_INITIAL);
 
 	ConditionVariableInit(&pstate->cv);
 
@@ -565,7 +556,7 @@ ExecBitmapHeapReInitializeDSM(BitmapHeapScanState *node,
 	if (dsa == NULL)
 		return;
 
-	pstate->state = BM_INITIAL;
+	pg_atomic_write_u32(&pstate->state, BM_INITIAL);
 
 	if (DsaPointerIsValid(pstate->tbmiterator))
 		tbm_free_shared_area(dsa, pstate->tbmiterator);
-- 
2.50.1 (Apple Git-155)


--Ot5x3ffkWEuxilWO
Content-Type: text/plain; charset=us-ascii
Content-Disposition: attachment;
	filename=v1-0003-convert-FixedParallelState-last_xlog_end-to-an-at.patch



^ permalink  raw  reply  [nested|flat] 440+ messages in thread

* [PATCH v1 2/8] convert ParallelBitmapHeapState->state to an atomic
@ 2026-07-09 18:38 Nathan Bossart <nathan@postgresql.org>
  0 siblings, 0 replies; 440+ messages in thread

From: Nathan Bossart @ 2026-07-09 18:38 UTC (permalink / raw)

---
 src/backend/executor/nodeBitmapHeapscan.c | 21 ++++++---------------
 1 file changed, 6 insertions(+), 15 deletions(-)

diff --git a/src/backend/executor/nodeBitmapHeapscan.c b/src/backend/executor/nodeBitmapHeapscan.c
index 83d6478bc2b..f2bb487bf10 100644
--- a/src/backend/executor/nodeBitmapHeapscan.c
+++ b/src/backend/executor/nodeBitmapHeapscan.c
@@ -79,7 +79,6 @@ typedef enum
 /* ----------------
  *	 ParallelBitmapHeapState information
  *		tbmiterator				iterator for scanning current pages
- *		mutex					mutual exclusion for state
  *		state					current state of the TIDBitmap
  *		cv						conditional wait variable
  * ----------------
@@ -87,8 +86,7 @@ typedef enum
 typedef struct ParallelBitmapHeapState
 {
 	dsa_pointer tbmiterator;
-	slock_t		mutex;
-	SharedBitmapState state;
+	pg_atomic_uint32 state;
 	ConditionVariable cv;
 } ParallelBitmapHeapState;
 
@@ -228,9 +226,7 @@ BitmapHeapNext(BitmapHeapScanState *node)
 static inline void
 BitmapDoneInitializingSharedState(ParallelBitmapHeapState *pstate)
 {
-	SpinLockAcquire(&pstate->mutex);
-	pstate->state = BM_FINISHED;
-	SpinLockRelease(&pstate->mutex);
+	pg_atomic_write_membarrier_u32(&pstate->state, BM_FINISHED);
 	ConditionVariableBroadcast(&pstate->cv);
 }
 
@@ -480,11 +476,8 @@ BitmapShouldInitializeSharedState(ParallelBitmapHeapState *pstate)
 
 	while (1)
 	{
-		SpinLockAcquire(&pstate->mutex);
-		state = pstate->state;
-		if (pstate->state == BM_INITIAL)
-			pstate->state = BM_INPROGRESS;
-		SpinLockRelease(&pstate->mutex);
+		state = BM_INITIAL;
+		pg_atomic_compare_exchange_u32(&pstate->state, &state, BM_INPROGRESS);
 
 		/* Exit if bitmap is done, or if we're the leader. */
 		if (state != BM_INPROGRESS)
@@ -538,9 +531,7 @@ ExecBitmapHeapInitializeDSM(BitmapHeapScanState *node,
 
 	pstate->tbmiterator = 0;
 
-	/* Initialize the mutex */
-	SpinLockInit(&pstate->mutex);
-	pstate->state = BM_INITIAL;
+	pg_atomic_init_u32(&pstate->state, BM_INITIAL);
 
 	ConditionVariableInit(&pstate->cv);
 
@@ -565,7 +556,7 @@ ExecBitmapHeapReInitializeDSM(BitmapHeapScanState *node,
 	if (dsa == NULL)
 		return;
 
-	pstate->state = BM_INITIAL;
+	pg_atomic_write_u32(&pstate->state, BM_INITIAL);
 
 	if (DsaPointerIsValid(pstate->tbmiterator))
 		tbm_free_shared_area(dsa, pstate->tbmiterator);
-- 
2.50.1 (Apple Git-155)


--Ot5x3ffkWEuxilWO
Content-Type: text/plain; charset=us-ascii
Content-Disposition: attachment;
	filename=v1-0003-convert-FixedParallelState-last_xlog_end-to-an-at.patch



^ permalink  raw  reply  [nested|flat] 440+ messages in thread

* [PATCH v1 2/8] convert ParallelBitmapHeapState->state to an atomic
@ 2026-07-09 18:38 Nathan Bossart <nathan@postgresql.org>
  0 siblings, 0 replies; 440+ messages in thread

From: Nathan Bossart @ 2026-07-09 18:38 UTC (permalink / raw)

---
 src/backend/executor/nodeBitmapHeapscan.c | 21 ++++++---------------
 1 file changed, 6 insertions(+), 15 deletions(-)

diff --git a/src/backend/executor/nodeBitmapHeapscan.c b/src/backend/executor/nodeBitmapHeapscan.c
index 83d6478bc2b..f2bb487bf10 100644
--- a/src/backend/executor/nodeBitmapHeapscan.c
+++ b/src/backend/executor/nodeBitmapHeapscan.c
@@ -79,7 +79,6 @@ typedef enum
 /* ----------------
  *	 ParallelBitmapHeapState information
  *		tbmiterator				iterator for scanning current pages
- *		mutex					mutual exclusion for state
  *		state					current state of the TIDBitmap
  *		cv						conditional wait variable
  * ----------------
@@ -87,8 +86,7 @@ typedef enum
 typedef struct ParallelBitmapHeapState
 {
 	dsa_pointer tbmiterator;
-	slock_t		mutex;
-	SharedBitmapState state;
+	pg_atomic_uint32 state;
 	ConditionVariable cv;
 } ParallelBitmapHeapState;
 
@@ -228,9 +226,7 @@ BitmapHeapNext(BitmapHeapScanState *node)
 static inline void
 BitmapDoneInitializingSharedState(ParallelBitmapHeapState *pstate)
 {
-	SpinLockAcquire(&pstate->mutex);
-	pstate->state = BM_FINISHED;
-	SpinLockRelease(&pstate->mutex);
+	pg_atomic_write_membarrier_u32(&pstate->state, BM_FINISHED);
 	ConditionVariableBroadcast(&pstate->cv);
 }
 
@@ -480,11 +476,8 @@ BitmapShouldInitializeSharedState(ParallelBitmapHeapState *pstate)
 
 	while (1)
 	{
-		SpinLockAcquire(&pstate->mutex);
-		state = pstate->state;
-		if (pstate->state == BM_INITIAL)
-			pstate->state = BM_INPROGRESS;
-		SpinLockRelease(&pstate->mutex);
+		state = BM_INITIAL;
+		pg_atomic_compare_exchange_u32(&pstate->state, &state, BM_INPROGRESS);
 
 		/* Exit if bitmap is done, or if we're the leader. */
 		if (state != BM_INPROGRESS)
@@ -538,9 +531,7 @@ ExecBitmapHeapInitializeDSM(BitmapHeapScanState *node,
 
 	pstate->tbmiterator = 0;
 
-	/* Initialize the mutex */
-	SpinLockInit(&pstate->mutex);
-	pstate->state = BM_INITIAL;
+	pg_atomic_init_u32(&pstate->state, BM_INITIAL);
 
 	ConditionVariableInit(&pstate->cv);
 
@@ -565,7 +556,7 @@ ExecBitmapHeapReInitializeDSM(BitmapHeapScanState *node,
 	if (dsa == NULL)
 		return;
 
-	pstate->state = BM_INITIAL;
+	pg_atomic_write_u32(&pstate->state, BM_INITIAL);
 
 	if (DsaPointerIsValid(pstate->tbmiterator))
 		tbm_free_shared_area(dsa, pstate->tbmiterator);
-- 
2.50.1 (Apple Git-155)


--Ot5x3ffkWEuxilWO
Content-Type: text/plain; charset=us-ascii
Content-Disposition: attachment;
	filename=v1-0003-convert-FixedParallelState-last_xlog_end-to-an-at.patch



^ permalink  raw  reply  [nested|flat] 440+ messages in thread

* [PATCH v1 2/8] convert ParallelBitmapHeapState->state to an atomic
@ 2026-07-09 18:38 Nathan Bossart <nathan@postgresql.org>
  0 siblings, 0 replies; 440+ messages in thread

From: Nathan Bossart @ 2026-07-09 18:38 UTC (permalink / raw)

---
 src/backend/executor/nodeBitmapHeapscan.c | 21 ++++++---------------
 1 file changed, 6 insertions(+), 15 deletions(-)

diff --git a/src/backend/executor/nodeBitmapHeapscan.c b/src/backend/executor/nodeBitmapHeapscan.c
index 83d6478bc2b..f2bb487bf10 100644
--- a/src/backend/executor/nodeBitmapHeapscan.c
+++ b/src/backend/executor/nodeBitmapHeapscan.c
@@ -79,7 +79,6 @@ typedef enum
 /* ----------------
  *	 ParallelBitmapHeapState information
  *		tbmiterator				iterator for scanning current pages
- *		mutex					mutual exclusion for state
  *		state					current state of the TIDBitmap
  *		cv						conditional wait variable
  * ----------------
@@ -87,8 +86,7 @@ typedef enum
 typedef struct ParallelBitmapHeapState
 {
 	dsa_pointer tbmiterator;
-	slock_t		mutex;
-	SharedBitmapState state;
+	pg_atomic_uint32 state;
 	ConditionVariable cv;
 } ParallelBitmapHeapState;
 
@@ -228,9 +226,7 @@ BitmapHeapNext(BitmapHeapScanState *node)
 static inline void
 BitmapDoneInitializingSharedState(ParallelBitmapHeapState *pstate)
 {
-	SpinLockAcquire(&pstate->mutex);
-	pstate->state = BM_FINISHED;
-	SpinLockRelease(&pstate->mutex);
+	pg_atomic_write_membarrier_u32(&pstate->state, BM_FINISHED);
 	ConditionVariableBroadcast(&pstate->cv);
 }
 
@@ -480,11 +476,8 @@ BitmapShouldInitializeSharedState(ParallelBitmapHeapState *pstate)
 
 	while (1)
 	{
-		SpinLockAcquire(&pstate->mutex);
-		state = pstate->state;
-		if (pstate->state == BM_INITIAL)
-			pstate->state = BM_INPROGRESS;
-		SpinLockRelease(&pstate->mutex);
+		state = BM_INITIAL;
+		pg_atomic_compare_exchange_u32(&pstate->state, &state, BM_INPROGRESS);
 
 		/* Exit if bitmap is done, or if we're the leader. */
 		if (state != BM_INPROGRESS)
@@ -538,9 +531,7 @@ ExecBitmapHeapInitializeDSM(BitmapHeapScanState *node,
 
 	pstate->tbmiterator = 0;
 
-	/* Initialize the mutex */
-	SpinLockInit(&pstate->mutex);
-	pstate->state = BM_INITIAL;
+	pg_atomic_init_u32(&pstate->state, BM_INITIAL);
 
 	ConditionVariableInit(&pstate->cv);
 
@@ -565,7 +556,7 @@ ExecBitmapHeapReInitializeDSM(BitmapHeapScanState *node,
 	if (dsa == NULL)
 		return;
 
-	pstate->state = BM_INITIAL;
+	pg_atomic_write_u32(&pstate->state, BM_INITIAL);
 
 	if (DsaPointerIsValid(pstate->tbmiterator))
 		tbm_free_shared_area(dsa, pstate->tbmiterator);
-- 
2.50.1 (Apple Git-155)


--Ot5x3ffkWEuxilWO
Content-Type: text/plain; charset=us-ascii
Content-Disposition: attachment;
	filename=v1-0003-convert-FixedParallelState-last_xlog_end-to-an-at.patch



^ permalink  raw  reply  [nested|flat] 440+ messages in thread

* [PATCH v1 2/8] convert ParallelBitmapHeapState->state to an atomic
@ 2026-07-09 18:38 Nathan Bossart <nathan@postgresql.org>
  0 siblings, 0 replies; 440+ messages in thread

From: Nathan Bossart @ 2026-07-09 18:38 UTC (permalink / raw)

---
 src/backend/executor/nodeBitmapHeapscan.c | 21 ++++++---------------
 1 file changed, 6 insertions(+), 15 deletions(-)

diff --git a/src/backend/executor/nodeBitmapHeapscan.c b/src/backend/executor/nodeBitmapHeapscan.c
index 83d6478bc2b..f2bb487bf10 100644
--- a/src/backend/executor/nodeBitmapHeapscan.c
+++ b/src/backend/executor/nodeBitmapHeapscan.c
@@ -79,7 +79,6 @@ typedef enum
 /* ----------------
  *	 ParallelBitmapHeapState information
  *		tbmiterator				iterator for scanning current pages
- *		mutex					mutual exclusion for state
  *		state					current state of the TIDBitmap
  *		cv						conditional wait variable
  * ----------------
@@ -87,8 +86,7 @@ typedef enum
 typedef struct ParallelBitmapHeapState
 {
 	dsa_pointer tbmiterator;
-	slock_t		mutex;
-	SharedBitmapState state;
+	pg_atomic_uint32 state;
 	ConditionVariable cv;
 } ParallelBitmapHeapState;
 
@@ -228,9 +226,7 @@ BitmapHeapNext(BitmapHeapScanState *node)
 static inline void
 BitmapDoneInitializingSharedState(ParallelBitmapHeapState *pstate)
 {
-	SpinLockAcquire(&pstate->mutex);
-	pstate->state = BM_FINISHED;
-	SpinLockRelease(&pstate->mutex);
+	pg_atomic_write_membarrier_u32(&pstate->state, BM_FINISHED);
 	ConditionVariableBroadcast(&pstate->cv);
 }
 
@@ -480,11 +476,8 @@ BitmapShouldInitializeSharedState(ParallelBitmapHeapState *pstate)
 
 	while (1)
 	{
-		SpinLockAcquire(&pstate->mutex);
-		state = pstate->state;
-		if (pstate->state == BM_INITIAL)
-			pstate->state = BM_INPROGRESS;
-		SpinLockRelease(&pstate->mutex);
+		state = BM_INITIAL;
+		pg_atomic_compare_exchange_u32(&pstate->state, &state, BM_INPROGRESS);
 
 		/* Exit if bitmap is done, or if we're the leader. */
 		if (state != BM_INPROGRESS)
@@ -538,9 +531,7 @@ ExecBitmapHeapInitializeDSM(BitmapHeapScanState *node,
 
 	pstate->tbmiterator = 0;
 
-	/* Initialize the mutex */
-	SpinLockInit(&pstate->mutex);
-	pstate->state = BM_INITIAL;
+	pg_atomic_init_u32(&pstate->state, BM_INITIAL);
 
 	ConditionVariableInit(&pstate->cv);
 
@@ -565,7 +556,7 @@ ExecBitmapHeapReInitializeDSM(BitmapHeapScanState *node,
 	if (dsa == NULL)
 		return;
 
-	pstate->state = BM_INITIAL;
+	pg_atomic_write_u32(&pstate->state, BM_INITIAL);
 
 	if (DsaPointerIsValid(pstate->tbmiterator))
 		tbm_free_shared_area(dsa, pstate->tbmiterator);
-- 
2.50.1 (Apple Git-155)


--Ot5x3ffkWEuxilWO
Content-Type: text/plain; charset=us-ascii
Content-Disposition: attachment;
	filename=v1-0003-convert-FixedParallelState-last_xlog_end-to-an-at.patch



^ permalink  raw  reply  [nested|flat] 440+ messages in thread

* [PATCH v1 2/8] convert ParallelBitmapHeapState->state to an atomic
@ 2026-07-09 18:38 Nathan Bossart <nathan@postgresql.org>
  0 siblings, 0 replies; 440+ messages in thread

From: Nathan Bossart @ 2026-07-09 18:38 UTC (permalink / raw)

---
 src/backend/executor/nodeBitmapHeapscan.c | 21 ++++++---------------
 1 file changed, 6 insertions(+), 15 deletions(-)

diff --git a/src/backend/executor/nodeBitmapHeapscan.c b/src/backend/executor/nodeBitmapHeapscan.c
index 83d6478bc2b..f2bb487bf10 100644
--- a/src/backend/executor/nodeBitmapHeapscan.c
+++ b/src/backend/executor/nodeBitmapHeapscan.c
@@ -79,7 +79,6 @@ typedef enum
 /* ----------------
  *	 ParallelBitmapHeapState information
  *		tbmiterator				iterator for scanning current pages
- *		mutex					mutual exclusion for state
  *		state					current state of the TIDBitmap
  *		cv						conditional wait variable
  * ----------------
@@ -87,8 +86,7 @@ typedef enum
 typedef struct ParallelBitmapHeapState
 {
 	dsa_pointer tbmiterator;
-	slock_t		mutex;
-	SharedBitmapState state;
+	pg_atomic_uint32 state;
 	ConditionVariable cv;
 } ParallelBitmapHeapState;
 
@@ -228,9 +226,7 @@ BitmapHeapNext(BitmapHeapScanState *node)
 static inline void
 BitmapDoneInitializingSharedState(ParallelBitmapHeapState *pstate)
 {
-	SpinLockAcquire(&pstate->mutex);
-	pstate->state = BM_FINISHED;
-	SpinLockRelease(&pstate->mutex);
+	pg_atomic_write_membarrier_u32(&pstate->state, BM_FINISHED);
 	ConditionVariableBroadcast(&pstate->cv);
 }
 
@@ -480,11 +476,8 @@ BitmapShouldInitializeSharedState(ParallelBitmapHeapState *pstate)
 
 	while (1)
 	{
-		SpinLockAcquire(&pstate->mutex);
-		state = pstate->state;
-		if (pstate->state == BM_INITIAL)
-			pstate->state = BM_INPROGRESS;
-		SpinLockRelease(&pstate->mutex);
+		state = BM_INITIAL;
+		pg_atomic_compare_exchange_u32(&pstate->state, &state, BM_INPROGRESS);
 
 		/* Exit if bitmap is done, or if we're the leader. */
 		if (state != BM_INPROGRESS)
@@ -538,9 +531,7 @@ ExecBitmapHeapInitializeDSM(BitmapHeapScanState *node,
 
 	pstate->tbmiterator = 0;
 
-	/* Initialize the mutex */
-	SpinLockInit(&pstate->mutex);
-	pstate->state = BM_INITIAL;
+	pg_atomic_init_u32(&pstate->state, BM_INITIAL);
 
 	ConditionVariableInit(&pstate->cv);
 
@@ -565,7 +556,7 @@ ExecBitmapHeapReInitializeDSM(BitmapHeapScanState *node,
 	if (dsa == NULL)
 		return;
 
-	pstate->state = BM_INITIAL;
+	pg_atomic_write_u32(&pstate->state, BM_INITIAL);
 
 	if (DsaPointerIsValid(pstate->tbmiterator))
 		tbm_free_shared_area(dsa, pstate->tbmiterator);
-- 
2.50.1 (Apple Git-155)


--Ot5x3ffkWEuxilWO
Content-Type: text/plain; charset=us-ascii
Content-Disposition: attachment;
	filename=v1-0003-convert-FixedParallelState-last_xlog_end-to-an-at.patch



^ permalink  raw  reply  [nested|flat] 440+ messages in thread

* [PATCH v1 2/8] convert ParallelBitmapHeapState->state to an atomic
@ 2026-07-09 18:38 Nathan Bossart <nathan@postgresql.org>
  0 siblings, 0 replies; 440+ messages in thread

From: Nathan Bossart @ 2026-07-09 18:38 UTC (permalink / raw)

---
 src/backend/executor/nodeBitmapHeapscan.c | 21 ++++++---------------
 1 file changed, 6 insertions(+), 15 deletions(-)

diff --git a/src/backend/executor/nodeBitmapHeapscan.c b/src/backend/executor/nodeBitmapHeapscan.c
index 83d6478bc2b..f2bb487bf10 100644
--- a/src/backend/executor/nodeBitmapHeapscan.c
+++ b/src/backend/executor/nodeBitmapHeapscan.c
@@ -79,7 +79,6 @@ typedef enum
 /* ----------------
  *	 ParallelBitmapHeapState information
  *		tbmiterator				iterator for scanning current pages
- *		mutex					mutual exclusion for state
  *		state					current state of the TIDBitmap
  *		cv						conditional wait variable
  * ----------------
@@ -87,8 +86,7 @@ typedef enum
 typedef struct ParallelBitmapHeapState
 {
 	dsa_pointer tbmiterator;
-	slock_t		mutex;
-	SharedBitmapState state;
+	pg_atomic_uint32 state;
 	ConditionVariable cv;
 } ParallelBitmapHeapState;
 
@@ -228,9 +226,7 @@ BitmapHeapNext(BitmapHeapScanState *node)
 static inline void
 BitmapDoneInitializingSharedState(ParallelBitmapHeapState *pstate)
 {
-	SpinLockAcquire(&pstate->mutex);
-	pstate->state = BM_FINISHED;
-	SpinLockRelease(&pstate->mutex);
+	pg_atomic_write_membarrier_u32(&pstate->state, BM_FINISHED);
 	ConditionVariableBroadcast(&pstate->cv);
 }
 
@@ -480,11 +476,8 @@ BitmapShouldInitializeSharedState(ParallelBitmapHeapState *pstate)
 
 	while (1)
 	{
-		SpinLockAcquire(&pstate->mutex);
-		state = pstate->state;
-		if (pstate->state == BM_INITIAL)
-			pstate->state = BM_INPROGRESS;
-		SpinLockRelease(&pstate->mutex);
+		state = BM_INITIAL;
+		pg_atomic_compare_exchange_u32(&pstate->state, &state, BM_INPROGRESS);
 
 		/* Exit if bitmap is done, or if we're the leader. */
 		if (state != BM_INPROGRESS)
@@ -538,9 +531,7 @@ ExecBitmapHeapInitializeDSM(BitmapHeapScanState *node,
 
 	pstate->tbmiterator = 0;
 
-	/* Initialize the mutex */
-	SpinLockInit(&pstate->mutex);
-	pstate->state = BM_INITIAL;
+	pg_atomic_init_u32(&pstate->state, BM_INITIAL);
 
 	ConditionVariableInit(&pstate->cv);
 
@@ -565,7 +556,7 @@ ExecBitmapHeapReInitializeDSM(BitmapHeapScanState *node,
 	if (dsa == NULL)
 		return;
 
-	pstate->state = BM_INITIAL;
+	pg_atomic_write_u32(&pstate->state, BM_INITIAL);
 
 	if (DsaPointerIsValid(pstate->tbmiterator))
 		tbm_free_shared_area(dsa, pstate->tbmiterator);
-- 
2.50.1 (Apple Git-155)


--Ot5x3ffkWEuxilWO
Content-Type: text/plain; charset=us-ascii
Content-Disposition: attachment;
	filename=v1-0003-convert-FixedParallelState-last_xlog_end-to-an-at.patch



^ permalink  raw  reply  [nested|flat] 440+ messages in thread

* [PATCH v1 2/8] convert ParallelBitmapHeapState->state to an atomic
@ 2026-07-09 18:38 Nathan Bossart <nathan@postgresql.org>
  0 siblings, 0 replies; 440+ messages in thread

From: Nathan Bossart @ 2026-07-09 18:38 UTC (permalink / raw)

---
 src/backend/executor/nodeBitmapHeapscan.c | 21 ++++++---------------
 1 file changed, 6 insertions(+), 15 deletions(-)

diff --git a/src/backend/executor/nodeBitmapHeapscan.c b/src/backend/executor/nodeBitmapHeapscan.c
index 83d6478bc2b..f2bb487bf10 100644
--- a/src/backend/executor/nodeBitmapHeapscan.c
+++ b/src/backend/executor/nodeBitmapHeapscan.c
@@ -79,7 +79,6 @@ typedef enum
 /* ----------------
  *	 ParallelBitmapHeapState information
  *		tbmiterator				iterator for scanning current pages
- *		mutex					mutual exclusion for state
  *		state					current state of the TIDBitmap
  *		cv						conditional wait variable
  * ----------------
@@ -87,8 +86,7 @@ typedef enum
 typedef struct ParallelBitmapHeapState
 {
 	dsa_pointer tbmiterator;
-	slock_t		mutex;
-	SharedBitmapState state;
+	pg_atomic_uint32 state;
 	ConditionVariable cv;
 } ParallelBitmapHeapState;
 
@@ -228,9 +226,7 @@ BitmapHeapNext(BitmapHeapScanState *node)
 static inline void
 BitmapDoneInitializingSharedState(ParallelBitmapHeapState *pstate)
 {
-	SpinLockAcquire(&pstate->mutex);
-	pstate->state = BM_FINISHED;
-	SpinLockRelease(&pstate->mutex);
+	pg_atomic_write_membarrier_u32(&pstate->state, BM_FINISHED);
 	ConditionVariableBroadcast(&pstate->cv);
 }
 
@@ -480,11 +476,8 @@ BitmapShouldInitializeSharedState(ParallelBitmapHeapState *pstate)
 
 	while (1)
 	{
-		SpinLockAcquire(&pstate->mutex);
-		state = pstate->state;
-		if (pstate->state == BM_INITIAL)
-			pstate->state = BM_INPROGRESS;
-		SpinLockRelease(&pstate->mutex);
+		state = BM_INITIAL;
+		pg_atomic_compare_exchange_u32(&pstate->state, &state, BM_INPROGRESS);
 
 		/* Exit if bitmap is done, or if we're the leader. */
 		if (state != BM_INPROGRESS)
@@ -538,9 +531,7 @@ ExecBitmapHeapInitializeDSM(BitmapHeapScanState *node,
 
 	pstate->tbmiterator = 0;
 
-	/* Initialize the mutex */
-	SpinLockInit(&pstate->mutex);
-	pstate->state = BM_INITIAL;
+	pg_atomic_init_u32(&pstate->state, BM_INITIAL);
 
 	ConditionVariableInit(&pstate->cv);
 
@@ -565,7 +556,7 @@ ExecBitmapHeapReInitializeDSM(BitmapHeapScanState *node,
 	if (dsa == NULL)
 		return;
 
-	pstate->state = BM_INITIAL;
+	pg_atomic_write_u32(&pstate->state, BM_INITIAL);
 
 	if (DsaPointerIsValid(pstate->tbmiterator))
 		tbm_free_shared_area(dsa, pstate->tbmiterator);
-- 
2.50.1 (Apple Git-155)


--Ot5x3ffkWEuxilWO
Content-Type: text/plain; charset=us-ascii
Content-Disposition: attachment;
	filename=v1-0003-convert-FixedParallelState-last_xlog_end-to-an-at.patch



^ permalink  raw  reply  [nested|flat] 440+ messages in thread

* [PATCH v1 2/8] convert ParallelBitmapHeapState->state to an atomic
@ 2026-07-09 18:38 Nathan Bossart <nathan@postgresql.org>
  0 siblings, 0 replies; 440+ messages in thread

From: Nathan Bossart @ 2026-07-09 18:38 UTC (permalink / raw)

---
 src/backend/executor/nodeBitmapHeapscan.c | 21 ++++++---------------
 1 file changed, 6 insertions(+), 15 deletions(-)

diff --git a/src/backend/executor/nodeBitmapHeapscan.c b/src/backend/executor/nodeBitmapHeapscan.c
index 83d6478bc2b..f2bb487bf10 100644
--- a/src/backend/executor/nodeBitmapHeapscan.c
+++ b/src/backend/executor/nodeBitmapHeapscan.c
@@ -79,7 +79,6 @@ typedef enum
 /* ----------------
  *	 ParallelBitmapHeapState information
  *		tbmiterator				iterator for scanning current pages
- *		mutex					mutual exclusion for state
  *		state					current state of the TIDBitmap
  *		cv						conditional wait variable
  * ----------------
@@ -87,8 +86,7 @@ typedef enum
 typedef struct ParallelBitmapHeapState
 {
 	dsa_pointer tbmiterator;
-	slock_t		mutex;
-	SharedBitmapState state;
+	pg_atomic_uint32 state;
 	ConditionVariable cv;
 } ParallelBitmapHeapState;
 
@@ -228,9 +226,7 @@ BitmapHeapNext(BitmapHeapScanState *node)
 static inline void
 BitmapDoneInitializingSharedState(ParallelBitmapHeapState *pstate)
 {
-	SpinLockAcquire(&pstate->mutex);
-	pstate->state = BM_FINISHED;
-	SpinLockRelease(&pstate->mutex);
+	pg_atomic_write_membarrier_u32(&pstate->state, BM_FINISHED);
 	ConditionVariableBroadcast(&pstate->cv);
 }
 
@@ -480,11 +476,8 @@ BitmapShouldInitializeSharedState(ParallelBitmapHeapState *pstate)
 
 	while (1)
 	{
-		SpinLockAcquire(&pstate->mutex);
-		state = pstate->state;
-		if (pstate->state == BM_INITIAL)
-			pstate->state = BM_INPROGRESS;
-		SpinLockRelease(&pstate->mutex);
+		state = BM_INITIAL;
+		pg_atomic_compare_exchange_u32(&pstate->state, &state, BM_INPROGRESS);
 
 		/* Exit if bitmap is done, or if we're the leader. */
 		if (state != BM_INPROGRESS)
@@ -538,9 +531,7 @@ ExecBitmapHeapInitializeDSM(BitmapHeapScanState *node,
 
 	pstate->tbmiterator = 0;
 
-	/* Initialize the mutex */
-	SpinLockInit(&pstate->mutex);
-	pstate->state = BM_INITIAL;
+	pg_atomic_init_u32(&pstate->state, BM_INITIAL);
 
 	ConditionVariableInit(&pstate->cv);
 
@@ -565,7 +556,7 @@ ExecBitmapHeapReInitializeDSM(BitmapHeapScanState *node,
 	if (dsa == NULL)
 		return;
 
-	pstate->state = BM_INITIAL;
+	pg_atomic_write_u32(&pstate->state, BM_INITIAL);
 
 	if (DsaPointerIsValid(pstate->tbmiterator))
 		tbm_free_shared_area(dsa, pstate->tbmiterator);
-- 
2.50.1 (Apple Git-155)


--Ot5x3ffkWEuxilWO
Content-Type: text/plain; charset=us-ascii
Content-Disposition: attachment;
	filename=v1-0003-convert-FixedParallelState-last_xlog_end-to-an-at.patch



^ permalink  raw  reply  [nested|flat] 440+ messages in thread

* [PATCH v1 2/8] convert ParallelBitmapHeapState->state to an atomic
@ 2026-07-09 18:38 Nathan Bossart <nathan@postgresql.org>
  0 siblings, 0 replies; 440+ messages in thread

From: Nathan Bossart @ 2026-07-09 18:38 UTC (permalink / raw)

---
 src/backend/executor/nodeBitmapHeapscan.c | 21 ++++++---------------
 1 file changed, 6 insertions(+), 15 deletions(-)

diff --git a/src/backend/executor/nodeBitmapHeapscan.c b/src/backend/executor/nodeBitmapHeapscan.c
index 83d6478bc2b..f2bb487bf10 100644
--- a/src/backend/executor/nodeBitmapHeapscan.c
+++ b/src/backend/executor/nodeBitmapHeapscan.c
@@ -79,7 +79,6 @@ typedef enum
 /* ----------------
  *	 ParallelBitmapHeapState information
  *		tbmiterator				iterator for scanning current pages
- *		mutex					mutual exclusion for state
  *		state					current state of the TIDBitmap
  *		cv						conditional wait variable
  * ----------------
@@ -87,8 +86,7 @@ typedef enum
 typedef struct ParallelBitmapHeapState
 {
 	dsa_pointer tbmiterator;
-	slock_t		mutex;
-	SharedBitmapState state;
+	pg_atomic_uint32 state;
 	ConditionVariable cv;
 } ParallelBitmapHeapState;
 
@@ -228,9 +226,7 @@ BitmapHeapNext(BitmapHeapScanState *node)
 static inline void
 BitmapDoneInitializingSharedState(ParallelBitmapHeapState *pstate)
 {
-	SpinLockAcquire(&pstate->mutex);
-	pstate->state = BM_FINISHED;
-	SpinLockRelease(&pstate->mutex);
+	pg_atomic_write_membarrier_u32(&pstate->state, BM_FINISHED);
 	ConditionVariableBroadcast(&pstate->cv);
 }
 
@@ -480,11 +476,8 @@ BitmapShouldInitializeSharedState(ParallelBitmapHeapState *pstate)
 
 	while (1)
 	{
-		SpinLockAcquire(&pstate->mutex);
-		state = pstate->state;
-		if (pstate->state == BM_INITIAL)
-			pstate->state = BM_INPROGRESS;
-		SpinLockRelease(&pstate->mutex);
+		state = BM_INITIAL;
+		pg_atomic_compare_exchange_u32(&pstate->state, &state, BM_INPROGRESS);
 
 		/* Exit if bitmap is done, or if we're the leader. */
 		if (state != BM_INPROGRESS)
@@ -538,9 +531,7 @@ ExecBitmapHeapInitializeDSM(BitmapHeapScanState *node,
 
 	pstate->tbmiterator = 0;
 
-	/* Initialize the mutex */
-	SpinLockInit(&pstate->mutex);
-	pstate->state = BM_INITIAL;
+	pg_atomic_init_u32(&pstate->state, BM_INITIAL);
 
 	ConditionVariableInit(&pstate->cv);
 
@@ -565,7 +556,7 @@ ExecBitmapHeapReInitializeDSM(BitmapHeapScanState *node,
 	if (dsa == NULL)
 		return;
 
-	pstate->state = BM_INITIAL;
+	pg_atomic_write_u32(&pstate->state, BM_INITIAL);
 
 	if (DsaPointerIsValid(pstate->tbmiterator))
 		tbm_free_shared_area(dsa, pstate->tbmiterator);
-- 
2.50.1 (Apple Git-155)


--Ot5x3ffkWEuxilWO
Content-Type: text/plain; charset=us-ascii
Content-Disposition: attachment;
	filename=v1-0003-convert-FixedParallelState-last_xlog_end-to-an-at.patch



^ permalink  raw  reply  [nested|flat] 440+ messages in thread

* [PATCH v2 2/9] convert ParallelBitmapHeapState->state to an atomic
@ 2026-07-09 18:38 Nathan Bossart <nathan@postgresql.org>
  0 siblings, 0 replies; 440+ messages in thread

From: Nathan Bossart @ 2026-07-09 18:38 UTC (permalink / raw)

---
 src/backend/executor/nodeBitmapHeapscan.c | 23 +++++++----------------
 1 file changed, 7 insertions(+), 16 deletions(-)

diff --git a/src/backend/executor/nodeBitmapHeapscan.c b/src/backend/executor/nodeBitmapHeapscan.c
index 83d6478bc2b..a9e83f30687 100644
--- a/src/backend/executor/nodeBitmapHeapscan.c
+++ b/src/backend/executor/nodeBitmapHeapscan.c
@@ -79,7 +79,6 @@ typedef enum
 /* ----------------
  *	 ParallelBitmapHeapState information
  *		tbmiterator				iterator for scanning current pages
- *		mutex					mutual exclusion for state
  *		state					current state of the TIDBitmap
  *		cv						conditional wait variable
  * ----------------
@@ -87,8 +86,7 @@ typedef enum
 typedef struct ParallelBitmapHeapState
 {
 	dsa_pointer tbmiterator;
-	slock_t		mutex;
-	SharedBitmapState state;
+	pg_atomic_uint32 state;
 	ConditionVariable cv;
 } ParallelBitmapHeapState;
 
@@ -228,9 +226,7 @@ BitmapHeapNext(BitmapHeapScanState *node)
 static inline void
 BitmapDoneInitializingSharedState(ParallelBitmapHeapState *pstate)
 {
-	SpinLockAcquire(&pstate->mutex);
-	pstate->state = BM_FINISHED;
-	SpinLockRelease(&pstate->mutex);
+	pg_atomic_write_membarrier_u32(&pstate->state, BM_FINISHED);
 	ConditionVariableBroadcast(&pstate->cv);
 }
 
@@ -476,15 +472,12 @@ ExecInitBitmapHeapScan(BitmapHeapScan *node, EState *estate, int eflags)
 static bool
 BitmapShouldInitializeSharedState(ParallelBitmapHeapState *pstate)
 {
-	SharedBitmapState state;
+	uint32		state;
 
 	while (1)
 	{
-		SpinLockAcquire(&pstate->mutex);
-		state = pstate->state;
-		if (pstate->state == BM_INITIAL)
-			pstate->state = BM_INPROGRESS;
-		SpinLockRelease(&pstate->mutex);
+		state = BM_INITIAL;
+		pg_atomic_compare_exchange_u32(&pstate->state, &state, BM_INPROGRESS);
 
 		/* Exit if bitmap is done, or if we're the leader. */
 		if (state != BM_INPROGRESS)
@@ -538,9 +531,7 @@ ExecBitmapHeapInitializeDSM(BitmapHeapScanState *node,
 
 	pstate->tbmiterator = 0;
 
-	/* Initialize the mutex */
-	SpinLockInit(&pstate->mutex);
-	pstate->state = BM_INITIAL;
+	pg_atomic_init_u32(&pstate->state, BM_INITIAL);
 
 	ConditionVariableInit(&pstate->cv);
 
@@ -565,7 +556,7 @@ ExecBitmapHeapReInitializeDSM(BitmapHeapScanState *node,
 	if (dsa == NULL)
 		return;
 
-	pstate->state = BM_INITIAL;
+	pg_atomic_write_u32(&pstate->state, BM_INITIAL);
 
 	if (DsaPointerIsValid(pstate->tbmiterator))
 		tbm_free_shared_area(dsa, pstate->tbmiterator);
-- 
2.50.1 (Apple Git-155)


--Xf36GNcW+0xZNily
Content-Type: text/plain; charset=us-ascii
Content-Disposition: attachment;
	filename=v2-0003-convert-FixedParallelState-last_xlog_end-to-an-at.patch



^ permalink  raw  reply  [nested|flat] 440+ messages in thread

* [PATCH v2 2/9] convert ParallelBitmapHeapState->state to an atomic
@ 2026-07-09 18:38 Nathan Bossart <nathan@postgresql.org>
  0 siblings, 0 replies; 440+ messages in thread

From: Nathan Bossart @ 2026-07-09 18:38 UTC (permalink / raw)

---
 src/backend/executor/nodeBitmapHeapscan.c | 23 +++++++----------------
 1 file changed, 7 insertions(+), 16 deletions(-)

diff --git a/src/backend/executor/nodeBitmapHeapscan.c b/src/backend/executor/nodeBitmapHeapscan.c
index 83d6478bc2b..a9e83f30687 100644
--- a/src/backend/executor/nodeBitmapHeapscan.c
+++ b/src/backend/executor/nodeBitmapHeapscan.c
@@ -79,7 +79,6 @@ typedef enum
 /* ----------------
  *	 ParallelBitmapHeapState information
  *		tbmiterator				iterator for scanning current pages
- *		mutex					mutual exclusion for state
  *		state					current state of the TIDBitmap
  *		cv						conditional wait variable
  * ----------------
@@ -87,8 +86,7 @@ typedef enum
 typedef struct ParallelBitmapHeapState
 {
 	dsa_pointer tbmiterator;
-	slock_t		mutex;
-	SharedBitmapState state;
+	pg_atomic_uint32 state;
 	ConditionVariable cv;
 } ParallelBitmapHeapState;
 
@@ -228,9 +226,7 @@ BitmapHeapNext(BitmapHeapScanState *node)
 static inline void
 BitmapDoneInitializingSharedState(ParallelBitmapHeapState *pstate)
 {
-	SpinLockAcquire(&pstate->mutex);
-	pstate->state = BM_FINISHED;
-	SpinLockRelease(&pstate->mutex);
+	pg_atomic_write_membarrier_u32(&pstate->state, BM_FINISHED);
 	ConditionVariableBroadcast(&pstate->cv);
 }
 
@@ -476,15 +472,12 @@ ExecInitBitmapHeapScan(BitmapHeapScan *node, EState *estate, int eflags)
 static bool
 BitmapShouldInitializeSharedState(ParallelBitmapHeapState *pstate)
 {
-	SharedBitmapState state;
+	uint32		state;
 
 	while (1)
 	{
-		SpinLockAcquire(&pstate->mutex);
-		state = pstate->state;
-		if (pstate->state == BM_INITIAL)
-			pstate->state = BM_INPROGRESS;
-		SpinLockRelease(&pstate->mutex);
+		state = BM_INITIAL;
+		pg_atomic_compare_exchange_u32(&pstate->state, &state, BM_INPROGRESS);
 
 		/* Exit if bitmap is done, or if we're the leader. */
 		if (state != BM_INPROGRESS)
@@ -538,9 +531,7 @@ ExecBitmapHeapInitializeDSM(BitmapHeapScanState *node,
 
 	pstate->tbmiterator = 0;
 
-	/* Initialize the mutex */
-	SpinLockInit(&pstate->mutex);
-	pstate->state = BM_INITIAL;
+	pg_atomic_init_u32(&pstate->state, BM_INITIAL);
 
 	ConditionVariableInit(&pstate->cv);
 
@@ -565,7 +556,7 @@ ExecBitmapHeapReInitializeDSM(BitmapHeapScanState *node,
 	if (dsa == NULL)
 		return;
 
-	pstate->state = BM_INITIAL;
+	pg_atomic_write_u32(&pstate->state, BM_INITIAL);
 
 	if (DsaPointerIsValid(pstate->tbmiterator))
 		tbm_free_shared_area(dsa, pstate->tbmiterator);
-- 
2.50.1 (Apple Git-155)


--Xf36GNcW+0xZNily
Content-Type: text/plain; charset=us-ascii
Content-Disposition: attachment;
	filename=v2-0003-convert-FixedParallelState-last_xlog_end-to-an-at.patch



^ permalink  raw  reply  [nested|flat] 440+ messages in thread

* [PATCH v1 2/8] convert ParallelBitmapHeapState->state to an atomic
@ 2026-07-09 18:38 Nathan Bossart <nathan@postgresql.org>
  0 siblings, 0 replies; 440+ messages in thread

From: Nathan Bossart @ 2026-07-09 18:38 UTC (permalink / raw)

---
 src/backend/executor/nodeBitmapHeapscan.c | 21 ++++++---------------
 1 file changed, 6 insertions(+), 15 deletions(-)

diff --git a/src/backend/executor/nodeBitmapHeapscan.c b/src/backend/executor/nodeBitmapHeapscan.c
index 83d6478bc2b..f2bb487bf10 100644
--- a/src/backend/executor/nodeBitmapHeapscan.c
+++ b/src/backend/executor/nodeBitmapHeapscan.c
@@ -79,7 +79,6 @@ typedef enum
 /* ----------------
  *	 ParallelBitmapHeapState information
  *		tbmiterator				iterator for scanning current pages
- *		mutex					mutual exclusion for state
  *		state					current state of the TIDBitmap
  *		cv						conditional wait variable
  * ----------------
@@ -87,8 +86,7 @@ typedef enum
 typedef struct ParallelBitmapHeapState
 {
 	dsa_pointer tbmiterator;
-	slock_t		mutex;
-	SharedBitmapState state;
+	pg_atomic_uint32 state;
 	ConditionVariable cv;
 } ParallelBitmapHeapState;
 
@@ -228,9 +226,7 @@ BitmapHeapNext(BitmapHeapScanState *node)
 static inline void
 BitmapDoneInitializingSharedState(ParallelBitmapHeapState *pstate)
 {
-	SpinLockAcquire(&pstate->mutex);
-	pstate->state = BM_FINISHED;
-	SpinLockRelease(&pstate->mutex);
+	pg_atomic_write_membarrier_u32(&pstate->state, BM_FINISHED);
 	ConditionVariableBroadcast(&pstate->cv);
 }
 
@@ -480,11 +476,8 @@ BitmapShouldInitializeSharedState(ParallelBitmapHeapState *pstate)
 
 	while (1)
 	{
-		SpinLockAcquire(&pstate->mutex);
-		state = pstate->state;
-		if (pstate->state == BM_INITIAL)
-			pstate->state = BM_INPROGRESS;
-		SpinLockRelease(&pstate->mutex);
+		state = BM_INITIAL;
+		pg_atomic_compare_exchange_u32(&pstate->state, &state, BM_INPROGRESS);
 
 		/* Exit if bitmap is done, or if we're the leader. */
 		if (state != BM_INPROGRESS)
@@ -538,9 +531,7 @@ ExecBitmapHeapInitializeDSM(BitmapHeapScanState *node,
 
 	pstate->tbmiterator = 0;
 
-	/* Initialize the mutex */
-	SpinLockInit(&pstate->mutex);
-	pstate->state = BM_INITIAL;
+	pg_atomic_init_u32(&pstate->state, BM_INITIAL);
 
 	ConditionVariableInit(&pstate->cv);
 
@@ -565,7 +556,7 @@ ExecBitmapHeapReInitializeDSM(BitmapHeapScanState *node,
 	if (dsa == NULL)
 		return;
 
-	pstate->state = BM_INITIAL;
+	pg_atomic_write_u32(&pstate->state, BM_INITIAL);
 
 	if (DsaPointerIsValid(pstate->tbmiterator))
 		tbm_free_shared_area(dsa, pstate->tbmiterator);
-- 
2.50.1 (Apple Git-155)


--Ot5x3ffkWEuxilWO
Content-Type: text/plain; charset=us-ascii
Content-Disposition: attachment;
	filename=v1-0003-convert-FixedParallelState-last_xlog_end-to-an-at.patch



^ permalink  raw  reply  [nested|flat] 440+ messages in thread

* [PATCH v1 2/8] convert ParallelBitmapHeapState->state to an atomic
@ 2026-07-09 18:38 Nathan Bossart <nathan@postgresql.org>
  0 siblings, 0 replies; 440+ messages in thread

From: Nathan Bossart @ 2026-07-09 18:38 UTC (permalink / raw)

---
 src/backend/executor/nodeBitmapHeapscan.c | 21 ++++++---------------
 1 file changed, 6 insertions(+), 15 deletions(-)

diff --git a/src/backend/executor/nodeBitmapHeapscan.c b/src/backend/executor/nodeBitmapHeapscan.c
index 83d6478bc2b..f2bb487bf10 100644
--- a/src/backend/executor/nodeBitmapHeapscan.c
+++ b/src/backend/executor/nodeBitmapHeapscan.c
@@ -79,7 +79,6 @@ typedef enum
 /* ----------------
  *	 ParallelBitmapHeapState information
  *		tbmiterator				iterator for scanning current pages
- *		mutex					mutual exclusion for state
  *		state					current state of the TIDBitmap
  *		cv						conditional wait variable
  * ----------------
@@ -87,8 +86,7 @@ typedef enum
 typedef struct ParallelBitmapHeapState
 {
 	dsa_pointer tbmiterator;
-	slock_t		mutex;
-	SharedBitmapState state;
+	pg_atomic_uint32 state;
 	ConditionVariable cv;
 } ParallelBitmapHeapState;
 
@@ -228,9 +226,7 @@ BitmapHeapNext(BitmapHeapScanState *node)
 static inline void
 BitmapDoneInitializingSharedState(ParallelBitmapHeapState *pstate)
 {
-	SpinLockAcquire(&pstate->mutex);
-	pstate->state = BM_FINISHED;
-	SpinLockRelease(&pstate->mutex);
+	pg_atomic_write_membarrier_u32(&pstate->state, BM_FINISHED);
 	ConditionVariableBroadcast(&pstate->cv);
 }
 
@@ -480,11 +476,8 @@ BitmapShouldInitializeSharedState(ParallelBitmapHeapState *pstate)
 
 	while (1)
 	{
-		SpinLockAcquire(&pstate->mutex);
-		state = pstate->state;
-		if (pstate->state == BM_INITIAL)
-			pstate->state = BM_INPROGRESS;
-		SpinLockRelease(&pstate->mutex);
+		state = BM_INITIAL;
+		pg_atomic_compare_exchange_u32(&pstate->state, &state, BM_INPROGRESS);
 
 		/* Exit if bitmap is done, or if we're the leader. */
 		if (state != BM_INPROGRESS)
@@ -538,9 +531,7 @@ ExecBitmapHeapInitializeDSM(BitmapHeapScanState *node,
 
 	pstate->tbmiterator = 0;
 
-	/* Initialize the mutex */
-	SpinLockInit(&pstate->mutex);
-	pstate->state = BM_INITIAL;
+	pg_atomic_init_u32(&pstate->state, BM_INITIAL);
 
 	ConditionVariableInit(&pstate->cv);
 
@@ -565,7 +556,7 @@ ExecBitmapHeapReInitializeDSM(BitmapHeapScanState *node,
 	if (dsa == NULL)
 		return;
 
-	pstate->state = BM_INITIAL;
+	pg_atomic_write_u32(&pstate->state, BM_INITIAL);
 
 	if (DsaPointerIsValid(pstate->tbmiterator))
 		tbm_free_shared_area(dsa, pstate->tbmiterator);
-- 
2.50.1 (Apple Git-155)


--Ot5x3ffkWEuxilWO
Content-Type: text/plain; charset=us-ascii
Content-Disposition: attachment;
	filename=v1-0003-convert-FixedParallelState-last_xlog_end-to-an-at.patch



^ permalink  raw  reply  [nested|flat] 440+ messages in thread

* [PATCH v1 2/8] convert ParallelBitmapHeapState->state to an atomic
@ 2026-07-09 18:38 Nathan Bossart <nathan@postgresql.org>
  0 siblings, 0 replies; 440+ messages in thread

From: Nathan Bossart @ 2026-07-09 18:38 UTC (permalink / raw)

---
 src/backend/executor/nodeBitmapHeapscan.c | 21 ++++++---------------
 1 file changed, 6 insertions(+), 15 deletions(-)

diff --git a/src/backend/executor/nodeBitmapHeapscan.c b/src/backend/executor/nodeBitmapHeapscan.c
index 83d6478bc2b..f2bb487bf10 100644
--- a/src/backend/executor/nodeBitmapHeapscan.c
+++ b/src/backend/executor/nodeBitmapHeapscan.c
@@ -79,7 +79,6 @@ typedef enum
 /* ----------------
  *	 ParallelBitmapHeapState information
  *		tbmiterator				iterator for scanning current pages
- *		mutex					mutual exclusion for state
  *		state					current state of the TIDBitmap
  *		cv						conditional wait variable
  * ----------------
@@ -87,8 +86,7 @@ typedef enum
 typedef struct ParallelBitmapHeapState
 {
 	dsa_pointer tbmiterator;
-	slock_t		mutex;
-	SharedBitmapState state;
+	pg_atomic_uint32 state;
 	ConditionVariable cv;
 } ParallelBitmapHeapState;
 
@@ -228,9 +226,7 @@ BitmapHeapNext(BitmapHeapScanState *node)
 static inline void
 BitmapDoneInitializingSharedState(ParallelBitmapHeapState *pstate)
 {
-	SpinLockAcquire(&pstate->mutex);
-	pstate->state = BM_FINISHED;
-	SpinLockRelease(&pstate->mutex);
+	pg_atomic_write_membarrier_u32(&pstate->state, BM_FINISHED);
 	ConditionVariableBroadcast(&pstate->cv);
 }
 
@@ -480,11 +476,8 @@ BitmapShouldInitializeSharedState(ParallelBitmapHeapState *pstate)
 
 	while (1)
 	{
-		SpinLockAcquire(&pstate->mutex);
-		state = pstate->state;
-		if (pstate->state == BM_INITIAL)
-			pstate->state = BM_INPROGRESS;
-		SpinLockRelease(&pstate->mutex);
+		state = BM_INITIAL;
+		pg_atomic_compare_exchange_u32(&pstate->state, &state, BM_INPROGRESS);
 
 		/* Exit if bitmap is done, or if we're the leader. */
 		if (state != BM_INPROGRESS)
@@ -538,9 +531,7 @@ ExecBitmapHeapInitializeDSM(BitmapHeapScanState *node,
 
 	pstate->tbmiterator = 0;
 
-	/* Initialize the mutex */
-	SpinLockInit(&pstate->mutex);
-	pstate->state = BM_INITIAL;
+	pg_atomic_init_u32(&pstate->state, BM_INITIAL);
 
 	ConditionVariableInit(&pstate->cv);
 
@@ -565,7 +556,7 @@ ExecBitmapHeapReInitializeDSM(BitmapHeapScanState *node,
 	if (dsa == NULL)
 		return;
 
-	pstate->state = BM_INITIAL;
+	pg_atomic_write_u32(&pstate->state, BM_INITIAL);
 
 	if (DsaPointerIsValid(pstate->tbmiterator))
 		tbm_free_shared_area(dsa, pstate->tbmiterator);
-- 
2.50.1 (Apple Git-155)


--Ot5x3ffkWEuxilWO
Content-Type: text/plain; charset=us-ascii
Content-Disposition: attachment;
	filename=v1-0003-convert-FixedParallelState-last_xlog_end-to-an-at.patch



^ permalink  raw  reply  [nested|flat] 440+ messages in thread

* [PATCH v2 2/9] convert ParallelBitmapHeapState->state to an atomic
@ 2026-07-09 18:38 Nathan Bossart <nathan@postgresql.org>
  0 siblings, 0 replies; 440+ messages in thread

From: Nathan Bossart @ 2026-07-09 18:38 UTC (permalink / raw)

---
 src/backend/executor/nodeBitmapHeapscan.c | 23 +++++++----------------
 1 file changed, 7 insertions(+), 16 deletions(-)

diff --git a/src/backend/executor/nodeBitmapHeapscan.c b/src/backend/executor/nodeBitmapHeapscan.c
index 83d6478bc2b..a9e83f30687 100644
--- a/src/backend/executor/nodeBitmapHeapscan.c
+++ b/src/backend/executor/nodeBitmapHeapscan.c
@@ -79,7 +79,6 @@ typedef enum
 /* ----------------
  *	 ParallelBitmapHeapState information
  *		tbmiterator				iterator for scanning current pages
- *		mutex					mutual exclusion for state
  *		state					current state of the TIDBitmap
  *		cv						conditional wait variable
  * ----------------
@@ -87,8 +86,7 @@ typedef enum
 typedef struct ParallelBitmapHeapState
 {
 	dsa_pointer tbmiterator;
-	slock_t		mutex;
-	SharedBitmapState state;
+	pg_atomic_uint32 state;
 	ConditionVariable cv;
 } ParallelBitmapHeapState;
 
@@ -228,9 +226,7 @@ BitmapHeapNext(BitmapHeapScanState *node)
 static inline void
 BitmapDoneInitializingSharedState(ParallelBitmapHeapState *pstate)
 {
-	SpinLockAcquire(&pstate->mutex);
-	pstate->state = BM_FINISHED;
-	SpinLockRelease(&pstate->mutex);
+	pg_atomic_write_membarrier_u32(&pstate->state, BM_FINISHED);
 	ConditionVariableBroadcast(&pstate->cv);
 }
 
@@ -476,15 +472,12 @@ ExecInitBitmapHeapScan(BitmapHeapScan *node, EState *estate, int eflags)
 static bool
 BitmapShouldInitializeSharedState(ParallelBitmapHeapState *pstate)
 {
-	SharedBitmapState state;
+	uint32		state;
 
 	while (1)
 	{
-		SpinLockAcquire(&pstate->mutex);
-		state = pstate->state;
-		if (pstate->state == BM_INITIAL)
-			pstate->state = BM_INPROGRESS;
-		SpinLockRelease(&pstate->mutex);
+		state = BM_INITIAL;
+		pg_atomic_compare_exchange_u32(&pstate->state, &state, BM_INPROGRESS);
 
 		/* Exit if bitmap is done, or if we're the leader. */
 		if (state != BM_INPROGRESS)
@@ -538,9 +531,7 @@ ExecBitmapHeapInitializeDSM(BitmapHeapScanState *node,
 
 	pstate->tbmiterator = 0;
 
-	/* Initialize the mutex */
-	SpinLockInit(&pstate->mutex);
-	pstate->state = BM_INITIAL;
+	pg_atomic_init_u32(&pstate->state, BM_INITIAL);
 
 	ConditionVariableInit(&pstate->cv);
 
@@ -565,7 +556,7 @@ ExecBitmapHeapReInitializeDSM(BitmapHeapScanState *node,
 	if (dsa == NULL)
 		return;
 
-	pstate->state = BM_INITIAL;
+	pg_atomic_write_u32(&pstate->state, BM_INITIAL);
 
 	if (DsaPointerIsValid(pstate->tbmiterator))
 		tbm_free_shared_area(dsa, pstate->tbmiterator);
-- 
2.50.1 (Apple Git-155)


--Xf36GNcW+0xZNily
Content-Type: text/plain; charset=us-ascii
Content-Disposition: attachment;
	filename=v2-0003-convert-FixedParallelState-last_xlog_end-to-an-at.patch



^ permalink  raw  reply  [nested|flat] 440+ messages in thread

* [PATCH v2 2/9] convert ParallelBitmapHeapState->state to an atomic
@ 2026-07-09 18:38 Nathan Bossart <nathan@postgresql.org>
  0 siblings, 0 replies; 440+ messages in thread

From: Nathan Bossart @ 2026-07-09 18:38 UTC (permalink / raw)

---
 src/backend/executor/nodeBitmapHeapscan.c | 23 +++++++----------------
 1 file changed, 7 insertions(+), 16 deletions(-)

diff --git a/src/backend/executor/nodeBitmapHeapscan.c b/src/backend/executor/nodeBitmapHeapscan.c
index 83d6478bc2b..a9e83f30687 100644
--- a/src/backend/executor/nodeBitmapHeapscan.c
+++ b/src/backend/executor/nodeBitmapHeapscan.c
@@ -79,7 +79,6 @@ typedef enum
 /* ----------------
  *	 ParallelBitmapHeapState information
  *		tbmiterator				iterator for scanning current pages
- *		mutex					mutual exclusion for state
  *		state					current state of the TIDBitmap
  *		cv						conditional wait variable
  * ----------------
@@ -87,8 +86,7 @@ typedef enum
 typedef struct ParallelBitmapHeapState
 {
 	dsa_pointer tbmiterator;
-	slock_t		mutex;
-	SharedBitmapState state;
+	pg_atomic_uint32 state;
 	ConditionVariable cv;
 } ParallelBitmapHeapState;
 
@@ -228,9 +226,7 @@ BitmapHeapNext(BitmapHeapScanState *node)
 static inline void
 BitmapDoneInitializingSharedState(ParallelBitmapHeapState *pstate)
 {
-	SpinLockAcquire(&pstate->mutex);
-	pstate->state = BM_FINISHED;
-	SpinLockRelease(&pstate->mutex);
+	pg_atomic_write_membarrier_u32(&pstate->state, BM_FINISHED);
 	ConditionVariableBroadcast(&pstate->cv);
 }
 
@@ -476,15 +472,12 @@ ExecInitBitmapHeapScan(BitmapHeapScan *node, EState *estate, int eflags)
 static bool
 BitmapShouldInitializeSharedState(ParallelBitmapHeapState *pstate)
 {
-	SharedBitmapState state;
+	uint32		state;
 
 	while (1)
 	{
-		SpinLockAcquire(&pstate->mutex);
-		state = pstate->state;
-		if (pstate->state == BM_INITIAL)
-			pstate->state = BM_INPROGRESS;
-		SpinLockRelease(&pstate->mutex);
+		state = BM_INITIAL;
+		pg_atomic_compare_exchange_u32(&pstate->state, &state, BM_INPROGRESS);
 
 		/* Exit if bitmap is done, or if we're the leader. */
 		if (state != BM_INPROGRESS)
@@ -538,9 +531,7 @@ ExecBitmapHeapInitializeDSM(BitmapHeapScanState *node,
 
 	pstate->tbmiterator = 0;
 
-	/* Initialize the mutex */
-	SpinLockInit(&pstate->mutex);
-	pstate->state = BM_INITIAL;
+	pg_atomic_init_u32(&pstate->state, BM_INITIAL);
 
 	ConditionVariableInit(&pstate->cv);
 
@@ -565,7 +556,7 @@ ExecBitmapHeapReInitializeDSM(BitmapHeapScanState *node,
 	if (dsa == NULL)
 		return;
 
-	pstate->state = BM_INITIAL;
+	pg_atomic_write_u32(&pstate->state, BM_INITIAL);
 
 	if (DsaPointerIsValid(pstate->tbmiterator))
 		tbm_free_shared_area(dsa, pstate->tbmiterator);
-- 
2.50.1 (Apple Git-155)


--Xf36GNcW+0xZNily
Content-Type: text/plain; charset=us-ascii
Content-Disposition: attachment;
	filename=v2-0003-convert-FixedParallelState-last_xlog_end-to-an-at.patch



^ permalink  raw  reply  [nested|flat] 440+ messages in thread

* [PATCH v1 2/8] convert ParallelBitmapHeapState->state to an atomic
@ 2026-07-09 18:38 Nathan Bossart <nathan@postgresql.org>
  0 siblings, 0 replies; 440+ messages in thread

From: Nathan Bossart @ 2026-07-09 18:38 UTC (permalink / raw)

---
 src/backend/executor/nodeBitmapHeapscan.c | 21 ++++++---------------
 1 file changed, 6 insertions(+), 15 deletions(-)

diff --git a/src/backend/executor/nodeBitmapHeapscan.c b/src/backend/executor/nodeBitmapHeapscan.c
index 83d6478bc2b..f2bb487bf10 100644
--- a/src/backend/executor/nodeBitmapHeapscan.c
+++ b/src/backend/executor/nodeBitmapHeapscan.c
@@ -79,7 +79,6 @@ typedef enum
 /* ----------------
  *	 ParallelBitmapHeapState information
  *		tbmiterator				iterator for scanning current pages
- *		mutex					mutual exclusion for state
  *		state					current state of the TIDBitmap
  *		cv						conditional wait variable
  * ----------------
@@ -87,8 +86,7 @@ typedef enum
 typedef struct ParallelBitmapHeapState
 {
 	dsa_pointer tbmiterator;
-	slock_t		mutex;
-	SharedBitmapState state;
+	pg_atomic_uint32 state;
 	ConditionVariable cv;
 } ParallelBitmapHeapState;
 
@@ -228,9 +226,7 @@ BitmapHeapNext(BitmapHeapScanState *node)
 static inline void
 BitmapDoneInitializingSharedState(ParallelBitmapHeapState *pstate)
 {
-	SpinLockAcquire(&pstate->mutex);
-	pstate->state = BM_FINISHED;
-	SpinLockRelease(&pstate->mutex);
+	pg_atomic_write_membarrier_u32(&pstate->state, BM_FINISHED);
 	ConditionVariableBroadcast(&pstate->cv);
 }
 
@@ -480,11 +476,8 @@ BitmapShouldInitializeSharedState(ParallelBitmapHeapState *pstate)
 
 	while (1)
 	{
-		SpinLockAcquire(&pstate->mutex);
-		state = pstate->state;
-		if (pstate->state == BM_INITIAL)
-			pstate->state = BM_INPROGRESS;
-		SpinLockRelease(&pstate->mutex);
+		state = BM_INITIAL;
+		pg_atomic_compare_exchange_u32(&pstate->state, &state, BM_INPROGRESS);
 
 		/* Exit if bitmap is done, or if we're the leader. */
 		if (state != BM_INPROGRESS)
@@ -538,9 +531,7 @@ ExecBitmapHeapInitializeDSM(BitmapHeapScanState *node,
 
 	pstate->tbmiterator = 0;
 
-	/* Initialize the mutex */
-	SpinLockInit(&pstate->mutex);
-	pstate->state = BM_INITIAL;
+	pg_atomic_init_u32(&pstate->state, BM_INITIAL);
 
 	ConditionVariableInit(&pstate->cv);
 
@@ -565,7 +556,7 @@ ExecBitmapHeapReInitializeDSM(BitmapHeapScanState *node,
 	if (dsa == NULL)
 		return;
 
-	pstate->state = BM_INITIAL;
+	pg_atomic_write_u32(&pstate->state, BM_INITIAL);
 
 	if (DsaPointerIsValid(pstate->tbmiterator))
 		tbm_free_shared_area(dsa, pstate->tbmiterator);
-- 
2.50.1 (Apple Git-155)


--Ot5x3ffkWEuxilWO
Content-Type: text/plain; charset=us-ascii
Content-Disposition: attachment;
	filename=v1-0003-convert-FixedParallelState-last_xlog_end-to-an-at.patch



^ permalink  raw  reply  [nested|flat] 440+ messages in thread

* [PATCH v1 2/8] convert ParallelBitmapHeapState->state to an atomic
@ 2026-07-09 18:38 Nathan Bossart <nathan@postgresql.org>
  0 siblings, 0 replies; 440+ messages in thread

From: Nathan Bossart @ 2026-07-09 18:38 UTC (permalink / raw)

---
 src/backend/executor/nodeBitmapHeapscan.c | 21 ++++++---------------
 1 file changed, 6 insertions(+), 15 deletions(-)

diff --git a/src/backend/executor/nodeBitmapHeapscan.c b/src/backend/executor/nodeBitmapHeapscan.c
index 83d6478bc2b..f2bb487bf10 100644
--- a/src/backend/executor/nodeBitmapHeapscan.c
+++ b/src/backend/executor/nodeBitmapHeapscan.c
@@ -79,7 +79,6 @@ typedef enum
 /* ----------------
  *	 ParallelBitmapHeapState information
  *		tbmiterator				iterator for scanning current pages
- *		mutex					mutual exclusion for state
  *		state					current state of the TIDBitmap
  *		cv						conditional wait variable
  * ----------------
@@ -87,8 +86,7 @@ typedef enum
 typedef struct ParallelBitmapHeapState
 {
 	dsa_pointer tbmiterator;
-	slock_t		mutex;
-	SharedBitmapState state;
+	pg_atomic_uint32 state;
 	ConditionVariable cv;
 } ParallelBitmapHeapState;
 
@@ -228,9 +226,7 @@ BitmapHeapNext(BitmapHeapScanState *node)
 static inline void
 BitmapDoneInitializingSharedState(ParallelBitmapHeapState *pstate)
 {
-	SpinLockAcquire(&pstate->mutex);
-	pstate->state = BM_FINISHED;
-	SpinLockRelease(&pstate->mutex);
+	pg_atomic_write_membarrier_u32(&pstate->state, BM_FINISHED);
 	ConditionVariableBroadcast(&pstate->cv);
 }
 
@@ -480,11 +476,8 @@ BitmapShouldInitializeSharedState(ParallelBitmapHeapState *pstate)
 
 	while (1)
 	{
-		SpinLockAcquire(&pstate->mutex);
-		state = pstate->state;
-		if (pstate->state == BM_INITIAL)
-			pstate->state = BM_INPROGRESS;
-		SpinLockRelease(&pstate->mutex);
+		state = BM_INITIAL;
+		pg_atomic_compare_exchange_u32(&pstate->state, &state, BM_INPROGRESS);
 
 		/* Exit if bitmap is done, or if we're the leader. */
 		if (state != BM_INPROGRESS)
@@ -538,9 +531,7 @@ ExecBitmapHeapInitializeDSM(BitmapHeapScanState *node,
 
 	pstate->tbmiterator = 0;
 
-	/* Initialize the mutex */
-	SpinLockInit(&pstate->mutex);
-	pstate->state = BM_INITIAL;
+	pg_atomic_init_u32(&pstate->state, BM_INITIAL);
 
 	ConditionVariableInit(&pstate->cv);
 
@@ -565,7 +556,7 @@ ExecBitmapHeapReInitializeDSM(BitmapHeapScanState *node,
 	if (dsa == NULL)
 		return;
 
-	pstate->state = BM_INITIAL;
+	pg_atomic_write_u32(&pstate->state, BM_INITIAL);
 
 	if (DsaPointerIsValid(pstate->tbmiterator))
 		tbm_free_shared_area(dsa, pstate->tbmiterator);
-- 
2.50.1 (Apple Git-155)


--Ot5x3ffkWEuxilWO
Content-Type: text/plain; charset=us-ascii
Content-Disposition: attachment;
	filename=v1-0003-convert-FixedParallelState-last_xlog_end-to-an-at.patch



^ permalink  raw  reply  [nested|flat] 440+ messages in thread

* [PATCH v1 2/8] convert ParallelBitmapHeapState->state to an atomic
@ 2026-07-09 18:38 Nathan Bossart <nathan@postgresql.org>
  0 siblings, 0 replies; 440+ messages in thread

From: Nathan Bossart @ 2026-07-09 18:38 UTC (permalink / raw)

---
 src/backend/executor/nodeBitmapHeapscan.c | 21 ++++++---------------
 1 file changed, 6 insertions(+), 15 deletions(-)

diff --git a/src/backend/executor/nodeBitmapHeapscan.c b/src/backend/executor/nodeBitmapHeapscan.c
index 83d6478bc2b..f2bb487bf10 100644
--- a/src/backend/executor/nodeBitmapHeapscan.c
+++ b/src/backend/executor/nodeBitmapHeapscan.c
@@ -79,7 +79,6 @@ typedef enum
 /* ----------------
  *	 ParallelBitmapHeapState information
  *		tbmiterator				iterator for scanning current pages
- *		mutex					mutual exclusion for state
  *		state					current state of the TIDBitmap
  *		cv						conditional wait variable
  * ----------------
@@ -87,8 +86,7 @@ typedef enum
 typedef struct ParallelBitmapHeapState
 {
 	dsa_pointer tbmiterator;
-	slock_t		mutex;
-	SharedBitmapState state;
+	pg_atomic_uint32 state;
 	ConditionVariable cv;
 } ParallelBitmapHeapState;
 
@@ -228,9 +226,7 @@ BitmapHeapNext(BitmapHeapScanState *node)
 static inline void
 BitmapDoneInitializingSharedState(ParallelBitmapHeapState *pstate)
 {
-	SpinLockAcquire(&pstate->mutex);
-	pstate->state = BM_FINISHED;
-	SpinLockRelease(&pstate->mutex);
+	pg_atomic_write_membarrier_u32(&pstate->state, BM_FINISHED);
 	ConditionVariableBroadcast(&pstate->cv);
 }
 
@@ -480,11 +476,8 @@ BitmapShouldInitializeSharedState(ParallelBitmapHeapState *pstate)
 
 	while (1)
 	{
-		SpinLockAcquire(&pstate->mutex);
-		state = pstate->state;
-		if (pstate->state == BM_INITIAL)
-			pstate->state = BM_INPROGRESS;
-		SpinLockRelease(&pstate->mutex);
+		state = BM_INITIAL;
+		pg_atomic_compare_exchange_u32(&pstate->state, &state, BM_INPROGRESS);
 
 		/* Exit if bitmap is done, or if we're the leader. */
 		if (state != BM_INPROGRESS)
@@ -538,9 +531,7 @@ ExecBitmapHeapInitializeDSM(BitmapHeapScanState *node,
 
 	pstate->tbmiterator = 0;
 
-	/* Initialize the mutex */
-	SpinLockInit(&pstate->mutex);
-	pstate->state = BM_INITIAL;
+	pg_atomic_init_u32(&pstate->state, BM_INITIAL);
 
 	ConditionVariableInit(&pstate->cv);
 
@@ -565,7 +556,7 @@ ExecBitmapHeapReInitializeDSM(BitmapHeapScanState *node,
 	if (dsa == NULL)
 		return;
 
-	pstate->state = BM_INITIAL;
+	pg_atomic_write_u32(&pstate->state, BM_INITIAL);
 
 	if (DsaPointerIsValid(pstate->tbmiterator))
 		tbm_free_shared_area(dsa, pstate->tbmiterator);
-- 
2.50.1 (Apple Git-155)


--Ot5x3ffkWEuxilWO
Content-Type: text/plain; charset=us-ascii
Content-Disposition: attachment;
	filename=v1-0003-convert-FixedParallelState-last_xlog_end-to-an-at.patch



^ permalink  raw  reply  [nested|flat] 440+ messages in thread

* [PATCH v1 2/8] convert ParallelBitmapHeapState->state to an atomic
@ 2026-07-09 18:38 Nathan Bossart <nathan@postgresql.org>
  0 siblings, 0 replies; 440+ messages in thread

From: Nathan Bossart @ 2026-07-09 18:38 UTC (permalink / raw)

---
 src/backend/executor/nodeBitmapHeapscan.c | 21 ++++++---------------
 1 file changed, 6 insertions(+), 15 deletions(-)

diff --git a/src/backend/executor/nodeBitmapHeapscan.c b/src/backend/executor/nodeBitmapHeapscan.c
index 83d6478bc2b..f2bb487bf10 100644
--- a/src/backend/executor/nodeBitmapHeapscan.c
+++ b/src/backend/executor/nodeBitmapHeapscan.c
@@ -79,7 +79,6 @@ typedef enum
 /* ----------------
  *	 ParallelBitmapHeapState information
  *		tbmiterator				iterator for scanning current pages
- *		mutex					mutual exclusion for state
  *		state					current state of the TIDBitmap
  *		cv						conditional wait variable
  * ----------------
@@ -87,8 +86,7 @@ typedef enum
 typedef struct ParallelBitmapHeapState
 {
 	dsa_pointer tbmiterator;
-	slock_t		mutex;
-	SharedBitmapState state;
+	pg_atomic_uint32 state;
 	ConditionVariable cv;
 } ParallelBitmapHeapState;
 
@@ -228,9 +226,7 @@ BitmapHeapNext(BitmapHeapScanState *node)
 static inline void
 BitmapDoneInitializingSharedState(ParallelBitmapHeapState *pstate)
 {
-	SpinLockAcquire(&pstate->mutex);
-	pstate->state = BM_FINISHED;
-	SpinLockRelease(&pstate->mutex);
+	pg_atomic_write_membarrier_u32(&pstate->state, BM_FINISHED);
 	ConditionVariableBroadcast(&pstate->cv);
 }
 
@@ -480,11 +476,8 @@ BitmapShouldInitializeSharedState(ParallelBitmapHeapState *pstate)
 
 	while (1)
 	{
-		SpinLockAcquire(&pstate->mutex);
-		state = pstate->state;
-		if (pstate->state == BM_INITIAL)
-			pstate->state = BM_INPROGRESS;
-		SpinLockRelease(&pstate->mutex);
+		state = BM_INITIAL;
+		pg_atomic_compare_exchange_u32(&pstate->state, &state, BM_INPROGRESS);
 
 		/* Exit if bitmap is done, or if we're the leader. */
 		if (state != BM_INPROGRESS)
@@ -538,9 +531,7 @@ ExecBitmapHeapInitializeDSM(BitmapHeapScanState *node,
 
 	pstate->tbmiterator = 0;
 
-	/* Initialize the mutex */
-	SpinLockInit(&pstate->mutex);
-	pstate->state = BM_INITIAL;
+	pg_atomic_init_u32(&pstate->state, BM_INITIAL);
 
 	ConditionVariableInit(&pstate->cv);
 
@@ -565,7 +556,7 @@ ExecBitmapHeapReInitializeDSM(BitmapHeapScanState *node,
 	if (dsa == NULL)
 		return;
 
-	pstate->state = BM_INITIAL;
+	pg_atomic_write_u32(&pstate->state, BM_INITIAL);
 
 	if (DsaPointerIsValid(pstate->tbmiterator))
 		tbm_free_shared_area(dsa, pstate->tbmiterator);
-- 
2.50.1 (Apple Git-155)


--Ot5x3ffkWEuxilWO
Content-Type: text/plain; charset=us-ascii
Content-Disposition: attachment;
	filename=v1-0003-convert-FixedParallelState-last_xlog_end-to-an-at.patch



^ permalink  raw  reply  [nested|flat] 440+ messages in thread

* [PATCH v1 2/8] convert ParallelBitmapHeapState->state to an atomic
@ 2026-07-09 18:38 Nathan Bossart <nathan@postgresql.org>
  0 siblings, 0 replies; 440+ messages in thread

From: Nathan Bossart @ 2026-07-09 18:38 UTC (permalink / raw)

---
 src/backend/executor/nodeBitmapHeapscan.c | 21 ++++++---------------
 1 file changed, 6 insertions(+), 15 deletions(-)

diff --git a/src/backend/executor/nodeBitmapHeapscan.c b/src/backend/executor/nodeBitmapHeapscan.c
index 83d6478bc2b..f2bb487bf10 100644
--- a/src/backend/executor/nodeBitmapHeapscan.c
+++ b/src/backend/executor/nodeBitmapHeapscan.c
@@ -79,7 +79,6 @@ typedef enum
 /* ----------------
  *	 ParallelBitmapHeapState information
  *		tbmiterator				iterator for scanning current pages
- *		mutex					mutual exclusion for state
  *		state					current state of the TIDBitmap
  *		cv						conditional wait variable
  * ----------------
@@ -87,8 +86,7 @@ typedef enum
 typedef struct ParallelBitmapHeapState
 {
 	dsa_pointer tbmiterator;
-	slock_t		mutex;
-	SharedBitmapState state;
+	pg_atomic_uint32 state;
 	ConditionVariable cv;
 } ParallelBitmapHeapState;
 
@@ -228,9 +226,7 @@ BitmapHeapNext(BitmapHeapScanState *node)
 static inline void
 BitmapDoneInitializingSharedState(ParallelBitmapHeapState *pstate)
 {
-	SpinLockAcquire(&pstate->mutex);
-	pstate->state = BM_FINISHED;
-	SpinLockRelease(&pstate->mutex);
+	pg_atomic_write_membarrier_u32(&pstate->state, BM_FINISHED);
 	ConditionVariableBroadcast(&pstate->cv);
 }
 
@@ -480,11 +476,8 @@ BitmapShouldInitializeSharedState(ParallelBitmapHeapState *pstate)
 
 	while (1)
 	{
-		SpinLockAcquire(&pstate->mutex);
-		state = pstate->state;
-		if (pstate->state == BM_INITIAL)
-			pstate->state = BM_INPROGRESS;
-		SpinLockRelease(&pstate->mutex);
+		state = BM_INITIAL;
+		pg_atomic_compare_exchange_u32(&pstate->state, &state, BM_INPROGRESS);
 
 		/* Exit if bitmap is done, or if we're the leader. */
 		if (state != BM_INPROGRESS)
@@ -538,9 +531,7 @@ ExecBitmapHeapInitializeDSM(BitmapHeapScanState *node,
 
 	pstate->tbmiterator = 0;
 
-	/* Initialize the mutex */
-	SpinLockInit(&pstate->mutex);
-	pstate->state = BM_INITIAL;
+	pg_atomic_init_u32(&pstate->state, BM_INITIAL);
 
 	ConditionVariableInit(&pstate->cv);
 
@@ -565,7 +556,7 @@ ExecBitmapHeapReInitializeDSM(BitmapHeapScanState *node,
 	if (dsa == NULL)
 		return;
 
-	pstate->state = BM_INITIAL;
+	pg_atomic_write_u32(&pstate->state, BM_INITIAL);
 
 	if (DsaPointerIsValid(pstate->tbmiterator))
 		tbm_free_shared_area(dsa, pstate->tbmiterator);
-- 
2.50.1 (Apple Git-155)


--Ot5x3ffkWEuxilWO
Content-Type: text/plain; charset=us-ascii
Content-Disposition: attachment;
	filename=v1-0003-convert-FixedParallelState-last_xlog_end-to-an-at.patch



^ permalink  raw  reply  [nested|flat] 440+ messages in thread

* [PATCH v2 2/9] convert ParallelBitmapHeapState->state to an atomic
@ 2026-07-09 18:38 Nathan Bossart <nathan@postgresql.org>
  0 siblings, 0 replies; 440+ messages in thread

From: Nathan Bossart @ 2026-07-09 18:38 UTC (permalink / raw)

---
 src/backend/executor/nodeBitmapHeapscan.c | 23 +++++++----------------
 1 file changed, 7 insertions(+), 16 deletions(-)

diff --git a/src/backend/executor/nodeBitmapHeapscan.c b/src/backend/executor/nodeBitmapHeapscan.c
index 83d6478bc2b..a9e83f30687 100644
--- a/src/backend/executor/nodeBitmapHeapscan.c
+++ b/src/backend/executor/nodeBitmapHeapscan.c
@@ -79,7 +79,6 @@ typedef enum
 /* ----------------
  *	 ParallelBitmapHeapState information
  *		tbmiterator				iterator for scanning current pages
- *		mutex					mutual exclusion for state
  *		state					current state of the TIDBitmap
  *		cv						conditional wait variable
  * ----------------
@@ -87,8 +86,7 @@ typedef enum
 typedef struct ParallelBitmapHeapState
 {
 	dsa_pointer tbmiterator;
-	slock_t		mutex;
-	SharedBitmapState state;
+	pg_atomic_uint32 state;
 	ConditionVariable cv;
 } ParallelBitmapHeapState;
 
@@ -228,9 +226,7 @@ BitmapHeapNext(BitmapHeapScanState *node)
 static inline void
 BitmapDoneInitializingSharedState(ParallelBitmapHeapState *pstate)
 {
-	SpinLockAcquire(&pstate->mutex);
-	pstate->state = BM_FINISHED;
-	SpinLockRelease(&pstate->mutex);
+	pg_atomic_write_membarrier_u32(&pstate->state, BM_FINISHED);
 	ConditionVariableBroadcast(&pstate->cv);
 }
 
@@ -476,15 +472,12 @@ ExecInitBitmapHeapScan(BitmapHeapScan *node, EState *estate, int eflags)
 static bool
 BitmapShouldInitializeSharedState(ParallelBitmapHeapState *pstate)
 {
-	SharedBitmapState state;
+	uint32		state;
 
 	while (1)
 	{
-		SpinLockAcquire(&pstate->mutex);
-		state = pstate->state;
-		if (pstate->state == BM_INITIAL)
-			pstate->state = BM_INPROGRESS;
-		SpinLockRelease(&pstate->mutex);
+		state = BM_INITIAL;
+		pg_atomic_compare_exchange_u32(&pstate->state, &state, BM_INPROGRESS);
 
 		/* Exit if bitmap is done, or if we're the leader. */
 		if (state != BM_INPROGRESS)
@@ -538,9 +531,7 @@ ExecBitmapHeapInitializeDSM(BitmapHeapScanState *node,
 
 	pstate->tbmiterator = 0;
 
-	/* Initialize the mutex */
-	SpinLockInit(&pstate->mutex);
-	pstate->state = BM_INITIAL;
+	pg_atomic_init_u32(&pstate->state, BM_INITIAL);
 
 	ConditionVariableInit(&pstate->cv);
 
@@ -565,7 +556,7 @@ ExecBitmapHeapReInitializeDSM(BitmapHeapScanState *node,
 	if (dsa == NULL)
 		return;
 
-	pstate->state = BM_INITIAL;
+	pg_atomic_write_u32(&pstate->state, BM_INITIAL);
 
 	if (DsaPointerIsValid(pstate->tbmiterator))
 		tbm_free_shared_area(dsa, pstate->tbmiterator);
-- 
2.50.1 (Apple Git-155)


--Xf36GNcW+0xZNily
Content-Type: text/plain; charset=us-ascii
Content-Disposition: attachment;
	filename=v2-0003-convert-FixedParallelState-last_xlog_end-to-an-at.patch



^ permalink  raw  reply  [nested|flat] 440+ messages in thread

* [PATCH v2 2/9] convert ParallelBitmapHeapState->state to an atomic
@ 2026-07-09 18:38 Nathan Bossart <nathan@postgresql.org>
  0 siblings, 0 replies; 440+ messages in thread

From: Nathan Bossart @ 2026-07-09 18:38 UTC (permalink / raw)

---
 src/backend/executor/nodeBitmapHeapscan.c | 23 +++++++----------------
 1 file changed, 7 insertions(+), 16 deletions(-)

diff --git a/src/backend/executor/nodeBitmapHeapscan.c b/src/backend/executor/nodeBitmapHeapscan.c
index 83d6478bc2b..a9e83f30687 100644
--- a/src/backend/executor/nodeBitmapHeapscan.c
+++ b/src/backend/executor/nodeBitmapHeapscan.c
@@ -79,7 +79,6 @@ typedef enum
 /* ----------------
  *	 ParallelBitmapHeapState information
  *		tbmiterator				iterator for scanning current pages
- *		mutex					mutual exclusion for state
  *		state					current state of the TIDBitmap
  *		cv						conditional wait variable
  * ----------------
@@ -87,8 +86,7 @@ typedef enum
 typedef struct ParallelBitmapHeapState
 {
 	dsa_pointer tbmiterator;
-	slock_t		mutex;
-	SharedBitmapState state;
+	pg_atomic_uint32 state;
 	ConditionVariable cv;
 } ParallelBitmapHeapState;
 
@@ -228,9 +226,7 @@ BitmapHeapNext(BitmapHeapScanState *node)
 static inline void
 BitmapDoneInitializingSharedState(ParallelBitmapHeapState *pstate)
 {
-	SpinLockAcquire(&pstate->mutex);
-	pstate->state = BM_FINISHED;
-	SpinLockRelease(&pstate->mutex);
+	pg_atomic_write_membarrier_u32(&pstate->state, BM_FINISHED);
 	ConditionVariableBroadcast(&pstate->cv);
 }
 
@@ -476,15 +472,12 @@ ExecInitBitmapHeapScan(BitmapHeapScan *node, EState *estate, int eflags)
 static bool
 BitmapShouldInitializeSharedState(ParallelBitmapHeapState *pstate)
 {
-	SharedBitmapState state;
+	uint32		state;
 
 	while (1)
 	{
-		SpinLockAcquire(&pstate->mutex);
-		state = pstate->state;
-		if (pstate->state == BM_INITIAL)
-			pstate->state = BM_INPROGRESS;
-		SpinLockRelease(&pstate->mutex);
+		state = BM_INITIAL;
+		pg_atomic_compare_exchange_u32(&pstate->state, &state, BM_INPROGRESS);
 
 		/* Exit if bitmap is done, or if we're the leader. */
 		if (state != BM_INPROGRESS)
@@ -538,9 +531,7 @@ ExecBitmapHeapInitializeDSM(BitmapHeapScanState *node,
 
 	pstate->tbmiterator = 0;
 
-	/* Initialize the mutex */
-	SpinLockInit(&pstate->mutex);
-	pstate->state = BM_INITIAL;
+	pg_atomic_init_u32(&pstate->state, BM_INITIAL);
 
 	ConditionVariableInit(&pstate->cv);
 
@@ -565,7 +556,7 @@ ExecBitmapHeapReInitializeDSM(BitmapHeapScanState *node,
 	if (dsa == NULL)
 		return;
 
-	pstate->state = BM_INITIAL;
+	pg_atomic_write_u32(&pstate->state, BM_INITIAL);
 
 	if (DsaPointerIsValid(pstate->tbmiterator))
 		tbm_free_shared_area(dsa, pstate->tbmiterator);
-- 
2.50.1 (Apple Git-155)


--Xf36GNcW+0xZNily
Content-Type: text/plain; charset=us-ascii
Content-Disposition: attachment;
	filename=v2-0003-convert-FixedParallelState-last_xlog_end-to-an-at.patch



^ permalink  raw  reply  [nested|flat] 440+ messages in thread

* [PATCH v1 2/8] convert ParallelBitmapHeapState->state to an atomic
@ 2026-07-09 18:38 Nathan Bossart <nathan@postgresql.org>
  0 siblings, 0 replies; 440+ messages in thread

From: Nathan Bossart @ 2026-07-09 18:38 UTC (permalink / raw)

---
 src/backend/executor/nodeBitmapHeapscan.c | 21 ++++++---------------
 1 file changed, 6 insertions(+), 15 deletions(-)

diff --git a/src/backend/executor/nodeBitmapHeapscan.c b/src/backend/executor/nodeBitmapHeapscan.c
index 83d6478bc2b..f2bb487bf10 100644
--- a/src/backend/executor/nodeBitmapHeapscan.c
+++ b/src/backend/executor/nodeBitmapHeapscan.c
@@ -79,7 +79,6 @@ typedef enum
 /* ----------------
  *	 ParallelBitmapHeapState information
  *		tbmiterator				iterator for scanning current pages
- *		mutex					mutual exclusion for state
  *		state					current state of the TIDBitmap
  *		cv						conditional wait variable
  * ----------------
@@ -87,8 +86,7 @@ typedef enum
 typedef struct ParallelBitmapHeapState
 {
 	dsa_pointer tbmiterator;
-	slock_t		mutex;
-	SharedBitmapState state;
+	pg_atomic_uint32 state;
 	ConditionVariable cv;
 } ParallelBitmapHeapState;
 
@@ -228,9 +226,7 @@ BitmapHeapNext(BitmapHeapScanState *node)
 static inline void
 BitmapDoneInitializingSharedState(ParallelBitmapHeapState *pstate)
 {
-	SpinLockAcquire(&pstate->mutex);
-	pstate->state = BM_FINISHED;
-	SpinLockRelease(&pstate->mutex);
+	pg_atomic_write_membarrier_u32(&pstate->state, BM_FINISHED);
 	ConditionVariableBroadcast(&pstate->cv);
 }
 
@@ -480,11 +476,8 @@ BitmapShouldInitializeSharedState(ParallelBitmapHeapState *pstate)
 
 	while (1)
 	{
-		SpinLockAcquire(&pstate->mutex);
-		state = pstate->state;
-		if (pstate->state == BM_INITIAL)
-			pstate->state = BM_INPROGRESS;
-		SpinLockRelease(&pstate->mutex);
+		state = BM_INITIAL;
+		pg_atomic_compare_exchange_u32(&pstate->state, &state, BM_INPROGRESS);
 
 		/* Exit if bitmap is done, or if we're the leader. */
 		if (state != BM_INPROGRESS)
@@ -538,9 +531,7 @@ ExecBitmapHeapInitializeDSM(BitmapHeapScanState *node,
 
 	pstate->tbmiterator = 0;
 
-	/* Initialize the mutex */
-	SpinLockInit(&pstate->mutex);
-	pstate->state = BM_INITIAL;
+	pg_atomic_init_u32(&pstate->state, BM_INITIAL);
 
 	ConditionVariableInit(&pstate->cv);
 
@@ -565,7 +556,7 @@ ExecBitmapHeapReInitializeDSM(BitmapHeapScanState *node,
 	if (dsa == NULL)
 		return;
 
-	pstate->state = BM_INITIAL;
+	pg_atomic_write_u32(&pstate->state, BM_INITIAL);
 
 	if (DsaPointerIsValid(pstate->tbmiterator))
 		tbm_free_shared_area(dsa, pstate->tbmiterator);
-- 
2.50.1 (Apple Git-155)


--Ot5x3ffkWEuxilWO
Content-Type: text/plain; charset=us-ascii
Content-Disposition: attachment;
	filename=v1-0003-convert-FixedParallelState-last_xlog_end-to-an-at.patch



^ permalink  raw  reply  [nested|flat] 440+ messages in thread

* [PATCH v1 2/8] convert ParallelBitmapHeapState->state to an atomic
@ 2026-07-09 18:38 Nathan Bossart <nathan@postgresql.org>
  0 siblings, 0 replies; 440+ messages in thread

From: Nathan Bossart @ 2026-07-09 18:38 UTC (permalink / raw)

---
 src/backend/executor/nodeBitmapHeapscan.c | 21 ++++++---------------
 1 file changed, 6 insertions(+), 15 deletions(-)

diff --git a/src/backend/executor/nodeBitmapHeapscan.c b/src/backend/executor/nodeBitmapHeapscan.c
index 83d6478bc2b..f2bb487bf10 100644
--- a/src/backend/executor/nodeBitmapHeapscan.c
+++ b/src/backend/executor/nodeBitmapHeapscan.c
@@ -79,7 +79,6 @@ typedef enum
 /* ----------------
  *	 ParallelBitmapHeapState information
  *		tbmiterator				iterator for scanning current pages
- *		mutex					mutual exclusion for state
  *		state					current state of the TIDBitmap
  *		cv						conditional wait variable
  * ----------------
@@ -87,8 +86,7 @@ typedef enum
 typedef struct ParallelBitmapHeapState
 {
 	dsa_pointer tbmiterator;
-	slock_t		mutex;
-	SharedBitmapState state;
+	pg_atomic_uint32 state;
 	ConditionVariable cv;
 } ParallelBitmapHeapState;
 
@@ -228,9 +226,7 @@ BitmapHeapNext(BitmapHeapScanState *node)
 static inline void
 BitmapDoneInitializingSharedState(ParallelBitmapHeapState *pstate)
 {
-	SpinLockAcquire(&pstate->mutex);
-	pstate->state = BM_FINISHED;
-	SpinLockRelease(&pstate->mutex);
+	pg_atomic_write_membarrier_u32(&pstate->state, BM_FINISHED);
 	ConditionVariableBroadcast(&pstate->cv);
 }
 
@@ -480,11 +476,8 @@ BitmapShouldInitializeSharedState(ParallelBitmapHeapState *pstate)
 
 	while (1)
 	{
-		SpinLockAcquire(&pstate->mutex);
-		state = pstate->state;
-		if (pstate->state == BM_INITIAL)
-			pstate->state = BM_INPROGRESS;
-		SpinLockRelease(&pstate->mutex);
+		state = BM_INITIAL;
+		pg_atomic_compare_exchange_u32(&pstate->state, &state, BM_INPROGRESS);
 
 		/* Exit if bitmap is done, or if we're the leader. */
 		if (state != BM_INPROGRESS)
@@ -538,9 +531,7 @@ ExecBitmapHeapInitializeDSM(BitmapHeapScanState *node,
 
 	pstate->tbmiterator = 0;
 
-	/* Initialize the mutex */
-	SpinLockInit(&pstate->mutex);
-	pstate->state = BM_INITIAL;
+	pg_atomic_init_u32(&pstate->state, BM_INITIAL);
 
 	ConditionVariableInit(&pstate->cv);
 
@@ -565,7 +556,7 @@ ExecBitmapHeapReInitializeDSM(BitmapHeapScanState *node,
 	if (dsa == NULL)
 		return;
 
-	pstate->state = BM_INITIAL;
+	pg_atomic_write_u32(&pstate->state, BM_INITIAL);
 
 	if (DsaPointerIsValid(pstate->tbmiterator))
 		tbm_free_shared_area(dsa, pstate->tbmiterator);
-- 
2.50.1 (Apple Git-155)


--Ot5x3ffkWEuxilWO
Content-Type: text/plain; charset=us-ascii
Content-Disposition: attachment;
	filename=v1-0003-convert-FixedParallelState-last_xlog_end-to-an-at.patch



^ permalink  raw  reply  [nested|flat] 440+ messages in thread

* [PATCH v1 2/8] convert ParallelBitmapHeapState->state to an atomic
@ 2026-07-09 18:38 Nathan Bossart <nathan@postgresql.org>
  0 siblings, 0 replies; 440+ messages in thread

From: Nathan Bossart @ 2026-07-09 18:38 UTC (permalink / raw)

---
 src/backend/executor/nodeBitmapHeapscan.c | 21 ++++++---------------
 1 file changed, 6 insertions(+), 15 deletions(-)

diff --git a/src/backend/executor/nodeBitmapHeapscan.c b/src/backend/executor/nodeBitmapHeapscan.c
index 83d6478bc2b..f2bb487bf10 100644
--- a/src/backend/executor/nodeBitmapHeapscan.c
+++ b/src/backend/executor/nodeBitmapHeapscan.c
@@ -79,7 +79,6 @@ typedef enum
 /* ----------------
  *	 ParallelBitmapHeapState information
  *		tbmiterator				iterator for scanning current pages
- *		mutex					mutual exclusion for state
  *		state					current state of the TIDBitmap
  *		cv						conditional wait variable
  * ----------------
@@ -87,8 +86,7 @@ typedef enum
 typedef struct ParallelBitmapHeapState
 {
 	dsa_pointer tbmiterator;
-	slock_t		mutex;
-	SharedBitmapState state;
+	pg_atomic_uint32 state;
 	ConditionVariable cv;
 } ParallelBitmapHeapState;
 
@@ -228,9 +226,7 @@ BitmapHeapNext(BitmapHeapScanState *node)
 static inline void
 BitmapDoneInitializingSharedState(ParallelBitmapHeapState *pstate)
 {
-	SpinLockAcquire(&pstate->mutex);
-	pstate->state = BM_FINISHED;
-	SpinLockRelease(&pstate->mutex);
+	pg_atomic_write_membarrier_u32(&pstate->state, BM_FINISHED);
 	ConditionVariableBroadcast(&pstate->cv);
 }
 
@@ -480,11 +476,8 @@ BitmapShouldInitializeSharedState(ParallelBitmapHeapState *pstate)
 
 	while (1)
 	{
-		SpinLockAcquire(&pstate->mutex);
-		state = pstate->state;
-		if (pstate->state == BM_INITIAL)
-			pstate->state = BM_INPROGRESS;
-		SpinLockRelease(&pstate->mutex);
+		state = BM_INITIAL;
+		pg_atomic_compare_exchange_u32(&pstate->state, &state, BM_INPROGRESS);
 
 		/* Exit if bitmap is done, or if we're the leader. */
 		if (state != BM_INPROGRESS)
@@ -538,9 +531,7 @@ ExecBitmapHeapInitializeDSM(BitmapHeapScanState *node,
 
 	pstate->tbmiterator = 0;
 
-	/* Initialize the mutex */
-	SpinLockInit(&pstate->mutex);
-	pstate->state = BM_INITIAL;
+	pg_atomic_init_u32(&pstate->state, BM_INITIAL);
 
 	ConditionVariableInit(&pstate->cv);
 
@@ -565,7 +556,7 @@ ExecBitmapHeapReInitializeDSM(BitmapHeapScanState *node,
 	if (dsa == NULL)
 		return;
 
-	pstate->state = BM_INITIAL;
+	pg_atomic_write_u32(&pstate->state, BM_INITIAL);
 
 	if (DsaPointerIsValid(pstate->tbmiterator))
 		tbm_free_shared_area(dsa, pstate->tbmiterator);
-- 
2.50.1 (Apple Git-155)


--Ot5x3ffkWEuxilWO
Content-Type: text/plain; charset=us-ascii
Content-Disposition: attachment;
	filename=v1-0003-convert-FixedParallelState-last_xlog_end-to-an-at.patch



^ permalink  raw  reply  [nested|flat] 440+ messages in thread

* [PATCH v1 2/8] convert ParallelBitmapHeapState->state to an atomic
@ 2026-07-09 18:38 Nathan Bossart <nathan@postgresql.org>
  0 siblings, 0 replies; 440+ messages in thread

From: Nathan Bossart @ 2026-07-09 18:38 UTC (permalink / raw)

---
 src/backend/executor/nodeBitmapHeapscan.c | 21 ++++++---------------
 1 file changed, 6 insertions(+), 15 deletions(-)

diff --git a/src/backend/executor/nodeBitmapHeapscan.c b/src/backend/executor/nodeBitmapHeapscan.c
index 83d6478bc2b..f2bb487bf10 100644
--- a/src/backend/executor/nodeBitmapHeapscan.c
+++ b/src/backend/executor/nodeBitmapHeapscan.c
@@ -79,7 +79,6 @@ typedef enum
 /* ----------------
  *	 ParallelBitmapHeapState information
  *		tbmiterator				iterator for scanning current pages
- *		mutex					mutual exclusion for state
  *		state					current state of the TIDBitmap
  *		cv						conditional wait variable
  * ----------------
@@ -87,8 +86,7 @@ typedef enum
 typedef struct ParallelBitmapHeapState
 {
 	dsa_pointer tbmiterator;
-	slock_t		mutex;
-	SharedBitmapState state;
+	pg_atomic_uint32 state;
 	ConditionVariable cv;
 } ParallelBitmapHeapState;
 
@@ -228,9 +226,7 @@ BitmapHeapNext(BitmapHeapScanState *node)
 static inline void
 BitmapDoneInitializingSharedState(ParallelBitmapHeapState *pstate)
 {
-	SpinLockAcquire(&pstate->mutex);
-	pstate->state = BM_FINISHED;
-	SpinLockRelease(&pstate->mutex);
+	pg_atomic_write_membarrier_u32(&pstate->state, BM_FINISHED);
 	ConditionVariableBroadcast(&pstate->cv);
 }
 
@@ -480,11 +476,8 @@ BitmapShouldInitializeSharedState(ParallelBitmapHeapState *pstate)
 
 	while (1)
 	{
-		SpinLockAcquire(&pstate->mutex);
-		state = pstate->state;
-		if (pstate->state == BM_INITIAL)
-			pstate->state = BM_INPROGRESS;
-		SpinLockRelease(&pstate->mutex);
+		state = BM_INITIAL;
+		pg_atomic_compare_exchange_u32(&pstate->state, &state, BM_INPROGRESS);
 
 		/* Exit if bitmap is done, or if we're the leader. */
 		if (state != BM_INPROGRESS)
@@ -538,9 +531,7 @@ ExecBitmapHeapInitializeDSM(BitmapHeapScanState *node,
 
 	pstate->tbmiterator = 0;
 
-	/* Initialize the mutex */
-	SpinLockInit(&pstate->mutex);
-	pstate->state = BM_INITIAL;
+	pg_atomic_init_u32(&pstate->state, BM_INITIAL);
 
 	ConditionVariableInit(&pstate->cv);
 
@@ -565,7 +556,7 @@ ExecBitmapHeapReInitializeDSM(BitmapHeapScanState *node,
 	if (dsa == NULL)
 		return;
 
-	pstate->state = BM_INITIAL;
+	pg_atomic_write_u32(&pstate->state, BM_INITIAL);
 
 	if (DsaPointerIsValid(pstate->tbmiterator))
 		tbm_free_shared_area(dsa, pstate->tbmiterator);
-- 
2.50.1 (Apple Git-155)


--Ot5x3ffkWEuxilWO
Content-Type: text/plain; charset=us-ascii
Content-Disposition: attachment;
	filename=v1-0003-convert-FixedParallelState-last_xlog_end-to-an-at.patch



^ permalink  raw  reply  [nested|flat] 440+ messages in thread

* [PATCH v1 2/8] convert ParallelBitmapHeapState->state to an atomic
@ 2026-07-09 18:38 Nathan Bossart <nathan@postgresql.org>
  0 siblings, 0 replies; 440+ messages in thread

From: Nathan Bossart @ 2026-07-09 18:38 UTC (permalink / raw)

---
 src/backend/executor/nodeBitmapHeapscan.c | 21 ++++++---------------
 1 file changed, 6 insertions(+), 15 deletions(-)

diff --git a/src/backend/executor/nodeBitmapHeapscan.c b/src/backend/executor/nodeBitmapHeapscan.c
index 83d6478bc2b..f2bb487bf10 100644
--- a/src/backend/executor/nodeBitmapHeapscan.c
+++ b/src/backend/executor/nodeBitmapHeapscan.c
@@ -79,7 +79,6 @@ typedef enum
 /* ----------------
  *	 ParallelBitmapHeapState information
  *		tbmiterator				iterator for scanning current pages
- *		mutex					mutual exclusion for state
  *		state					current state of the TIDBitmap
  *		cv						conditional wait variable
  * ----------------
@@ -87,8 +86,7 @@ typedef enum
 typedef struct ParallelBitmapHeapState
 {
 	dsa_pointer tbmiterator;
-	slock_t		mutex;
-	SharedBitmapState state;
+	pg_atomic_uint32 state;
 	ConditionVariable cv;
 } ParallelBitmapHeapState;
 
@@ -228,9 +226,7 @@ BitmapHeapNext(BitmapHeapScanState *node)
 static inline void
 BitmapDoneInitializingSharedState(ParallelBitmapHeapState *pstate)
 {
-	SpinLockAcquire(&pstate->mutex);
-	pstate->state = BM_FINISHED;
-	SpinLockRelease(&pstate->mutex);
+	pg_atomic_write_membarrier_u32(&pstate->state, BM_FINISHED);
 	ConditionVariableBroadcast(&pstate->cv);
 }
 
@@ -480,11 +476,8 @@ BitmapShouldInitializeSharedState(ParallelBitmapHeapState *pstate)
 
 	while (1)
 	{
-		SpinLockAcquire(&pstate->mutex);
-		state = pstate->state;
-		if (pstate->state == BM_INITIAL)
-			pstate->state = BM_INPROGRESS;
-		SpinLockRelease(&pstate->mutex);
+		state = BM_INITIAL;
+		pg_atomic_compare_exchange_u32(&pstate->state, &state, BM_INPROGRESS);
 
 		/* Exit if bitmap is done, or if we're the leader. */
 		if (state != BM_INPROGRESS)
@@ -538,9 +531,7 @@ ExecBitmapHeapInitializeDSM(BitmapHeapScanState *node,
 
 	pstate->tbmiterator = 0;
 
-	/* Initialize the mutex */
-	SpinLockInit(&pstate->mutex);
-	pstate->state = BM_INITIAL;
+	pg_atomic_init_u32(&pstate->state, BM_INITIAL);
 
 	ConditionVariableInit(&pstate->cv);
 
@@ -565,7 +556,7 @@ ExecBitmapHeapReInitializeDSM(BitmapHeapScanState *node,
 	if (dsa == NULL)
 		return;
 
-	pstate->state = BM_INITIAL;
+	pg_atomic_write_u32(&pstate->state, BM_INITIAL);
 
 	if (DsaPointerIsValid(pstate->tbmiterator))
 		tbm_free_shared_area(dsa, pstate->tbmiterator);
-- 
2.50.1 (Apple Git-155)


--Ot5x3ffkWEuxilWO
Content-Type: text/plain; charset=us-ascii
Content-Disposition: attachment;
	filename=v1-0003-convert-FixedParallelState-last_xlog_end-to-an-at.patch



^ permalink  raw  reply  [nested|flat] 440+ messages in thread

* [PATCH v1 2/8] convert ParallelBitmapHeapState->state to an atomic
@ 2026-07-09 18:38 Nathan Bossart <nathan@postgresql.org>
  0 siblings, 0 replies; 440+ messages in thread

From: Nathan Bossart @ 2026-07-09 18:38 UTC (permalink / raw)

---
 src/backend/executor/nodeBitmapHeapscan.c | 21 ++++++---------------
 1 file changed, 6 insertions(+), 15 deletions(-)

diff --git a/src/backend/executor/nodeBitmapHeapscan.c b/src/backend/executor/nodeBitmapHeapscan.c
index 83d6478bc2b..f2bb487bf10 100644
--- a/src/backend/executor/nodeBitmapHeapscan.c
+++ b/src/backend/executor/nodeBitmapHeapscan.c
@@ -79,7 +79,6 @@ typedef enum
 /* ----------------
  *	 ParallelBitmapHeapState information
  *		tbmiterator				iterator for scanning current pages
- *		mutex					mutual exclusion for state
  *		state					current state of the TIDBitmap
  *		cv						conditional wait variable
  * ----------------
@@ -87,8 +86,7 @@ typedef enum
 typedef struct ParallelBitmapHeapState
 {
 	dsa_pointer tbmiterator;
-	slock_t		mutex;
-	SharedBitmapState state;
+	pg_atomic_uint32 state;
 	ConditionVariable cv;
 } ParallelBitmapHeapState;
 
@@ -228,9 +226,7 @@ BitmapHeapNext(BitmapHeapScanState *node)
 static inline void
 BitmapDoneInitializingSharedState(ParallelBitmapHeapState *pstate)
 {
-	SpinLockAcquire(&pstate->mutex);
-	pstate->state = BM_FINISHED;
-	SpinLockRelease(&pstate->mutex);
+	pg_atomic_write_membarrier_u32(&pstate->state, BM_FINISHED);
 	ConditionVariableBroadcast(&pstate->cv);
 }
 
@@ -480,11 +476,8 @@ BitmapShouldInitializeSharedState(ParallelBitmapHeapState *pstate)
 
 	while (1)
 	{
-		SpinLockAcquire(&pstate->mutex);
-		state = pstate->state;
-		if (pstate->state == BM_INITIAL)
-			pstate->state = BM_INPROGRESS;
-		SpinLockRelease(&pstate->mutex);
+		state = BM_INITIAL;
+		pg_atomic_compare_exchange_u32(&pstate->state, &state, BM_INPROGRESS);
 
 		/* Exit if bitmap is done, or if we're the leader. */
 		if (state != BM_INPROGRESS)
@@ -538,9 +531,7 @@ ExecBitmapHeapInitializeDSM(BitmapHeapScanState *node,
 
 	pstate->tbmiterator = 0;
 
-	/* Initialize the mutex */
-	SpinLockInit(&pstate->mutex);
-	pstate->state = BM_INITIAL;
+	pg_atomic_init_u32(&pstate->state, BM_INITIAL);
 
 	ConditionVariableInit(&pstate->cv);
 
@@ -565,7 +556,7 @@ ExecBitmapHeapReInitializeDSM(BitmapHeapScanState *node,
 	if (dsa == NULL)
 		return;
 
-	pstate->state = BM_INITIAL;
+	pg_atomic_write_u32(&pstate->state, BM_INITIAL);
 
 	if (DsaPointerIsValid(pstate->tbmiterator))
 		tbm_free_shared_area(dsa, pstate->tbmiterator);
-- 
2.50.1 (Apple Git-155)


--Ot5x3ffkWEuxilWO
Content-Type: text/plain; charset=us-ascii
Content-Disposition: attachment;
	filename=v1-0003-convert-FixedParallelState-last_xlog_end-to-an-at.patch



^ permalink  raw  reply  [nested|flat] 440+ messages in thread

* [PATCH v1 2/8] convert ParallelBitmapHeapState->state to an atomic
@ 2026-07-09 18:38 Nathan Bossart <nathan@postgresql.org>
  0 siblings, 0 replies; 440+ messages in thread

From: Nathan Bossart @ 2026-07-09 18:38 UTC (permalink / raw)

---
 src/backend/executor/nodeBitmapHeapscan.c | 21 ++++++---------------
 1 file changed, 6 insertions(+), 15 deletions(-)

diff --git a/src/backend/executor/nodeBitmapHeapscan.c b/src/backend/executor/nodeBitmapHeapscan.c
index 83d6478bc2b..f2bb487bf10 100644
--- a/src/backend/executor/nodeBitmapHeapscan.c
+++ b/src/backend/executor/nodeBitmapHeapscan.c
@@ -79,7 +79,6 @@ typedef enum
 /* ----------------
  *	 ParallelBitmapHeapState information
  *		tbmiterator				iterator for scanning current pages
- *		mutex					mutual exclusion for state
  *		state					current state of the TIDBitmap
  *		cv						conditional wait variable
  * ----------------
@@ -87,8 +86,7 @@ typedef enum
 typedef struct ParallelBitmapHeapState
 {
 	dsa_pointer tbmiterator;
-	slock_t		mutex;
-	SharedBitmapState state;
+	pg_atomic_uint32 state;
 	ConditionVariable cv;
 } ParallelBitmapHeapState;
 
@@ -228,9 +226,7 @@ BitmapHeapNext(BitmapHeapScanState *node)
 static inline void
 BitmapDoneInitializingSharedState(ParallelBitmapHeapState *pstate)
 {
-	SpinLockAcquire(&pstate->mutex);
-	pstate->state = BM_FINISHED;
-	SpinLockRelease(&pstate->mutex);
+	pg_atomic_write_membarrier_u32(&pstate->state, BM_FINISHED);
 	ConditionVariableBroadcast(&pstate->cv);
 }
 
@@ -480,11 +476,8 @@ BitmapShouldInitializeSharedState(ParallelBitmapHeapState *pstate)
 
 	while (1)
 	{
-		SpinLockAcquire(&pstate->mutex);
-		state = pstate->state;
-		if (pstate->state == BM_INITIAL)
-			pstate->state = BM_INPROGRESS;
-		SpinLockRelease(&pstate->mutex);
+		state = BM_INITIAL;
+		pg_atomic_compare_exchange_u32(&pstate->state, &state, BM_INPROGRESS);
 
 		/* Exit if bitmap is done, or if we're the leader. */
 		if (state != BM_INPROGRESS)
@@ -538,9 +531,7 @@ ExecBitmapHeapInitializeDSM(BitmapHeapScanState *node,
 
 	pstate->tbmiterator = 0;
 
-	/* Initialize the mutex */
-	SpinLockInit(&pstate->mutex);
-	pstate->state = BM_INITIAL;
+	pg_atomic_init_u32(&pstate->state, BM_INITIAL);
 
 	ConditionVariableInit(&pstate->cv);
 
@@ -565,7 +556,7 @@ ExecBitmapHeapReInitializeDSM(BitmapHeapScanState *node,
 	if (dsa == NULL)
 		return;
 
-	pstate->state = BM_INITIAL;
+	pg_atomic_write_u32(&pstate->state, BM_INITIAL);
 
 	if (DsaPointerIsValid(pstate->tbmiterator))
 		tbm_free_shared_area(dsa, pstate->tbmiterator);
-- 
2.50.1 (Apple Git-155)


--Ot5x3ffkWEuxilWO
Content-Type: text/plain; charset=us-ascii
Content-Disposition: attachment;
	filename=v1-0003-convert-FixedParallelState-last_xlog_end-to-an-at.patch



^ permalink  raw  reply  [nested|flat] 440+ messages in thread

* [PATCH v1 2/8] convert ParallelBitmapHeapState->state to an atomic
@ 2026-07-09 18:38 Nathan Bossart <nathan@postgresql.org>
  0 siblings, 0 replies; 440+ messages in thread

From: Nathan Bossart @ 2026-07-09 18:38 UTC (permalink / raw)

---
 src/backend/executor/nodeBitmapHeapscan.c | 21 ++++++---------------
 1 file changed, 6 insertions(+), 15 deletions(-)

diff --git a/src/backend/executor/nodeBitmapHeapscan.c b/src/backend/executor/nodeBitmapHeapscan.c
index 83d6478bc2b..f2bb487bf10 100644
--- a/src/backend/executor/nodeBitmapHeapscan.c
+++ b/src/backend/executor/nodeBitmapHeapscan.c
@@ -79,7 +79,6 @@ typedef enum
 /* ----------------
  *	 ParallelBitmapHeapState information
  *		tbmiterator				iterator for scanning current pages
- *		mutex					mutual exclusion for state
  *		state					current state of the TIDBitmap
  *		cv						conditional wait variable
  * ----------------
@@ -87,8 +86,7 @@ typedef enum
 typedef struct ParallelBitmapHeapState
 {
 	dsa_pointer tbmiterator;
-	slock_t		mutex;
-	SharedBitmapState state;
+	pg_atomic_uint32 state;
 	ConditionVariable cv;
 } ParallelBitmapHeapState;
 
@@ -228,9 +226,7 @@ BitmapHeapNext(BitmapHeapScanState *node)
 static inline void
 BitmapDoneInitializingSharedState(ParallelBitmapHeapState *pstate)
 {
-	SpinLockAcquire(&pstate->mutex);
-	pstate->state = BM_FINISHED;
-	SpinLockRelease(&pstate->mutex);
+	pg_atomic_write_membarrier_u32(&pstate->state, BM_FINISHED);
 	ConditionVariableBroadcast(&pstate->cv);
 }
 
@@ -480,11 +476,8 @@ BitmapShouldInitializeSharedState(ParallelBitmapHeapState *pstate)
 
 	while (1)
 	{
-		SpinLockAcquire(&pstate->mutex);
-		state = pstate->state;
-		if (pstate->state == BM_INITIAL)
-			pstate->state = BM_INPROGRESS;
-		SpinLockRelease(&pstate->mutex);
+		state = BM_INITIAL;
+		pg_atomic_compare_exchange_u32(&pstate->state, &state, BM_INPROGRESS);
 
 		/* Exit if bitmap is done, or if we're the leader. */
 		if (state != BM_INPROGRESS)
@@ -538,9 +531,7 @@ ExecBitmapHeapInitializeDSM(BitmapHeapScanState *node,
 
 	pstate->tbmiterator = 0;
 
-	/* Initialize the mutex */
-	SpinLockInit(&pstate->mutex);
-	pstate->state = BM_INITIAL;
+	pg_atomic_init_u32(&pstate->state, BM_INITIAL);
 
 	ConditionVariableInit(&pstate->cv);
 
@@ -565,7 +556,7 @@ ExecBitmapHeapReInitializeDSM(BitmapHeapScanState *node,
 	if (dsa == NULL)
 		return;
 
-	pstate->state = BM_INITIAL;
+	pg_atomic_write_u32(&pstate->state, BM_INITIAL);
 
 	if (DsaPointerIsValid(pstate->tbmiterator))
 		tbm_free_shared_area(dsa, pstate->tbmiterator);
-- 
2.50.1 (Apple Git-155)


--Ot5x3ffkWEuxilWO
Content-Type: text/plain; charset=us-ascii
Content-Disposition: attachment;
	filename=v1-0003-convert-FixedParallelState-last_xlog_end-to-an-at.patch



^ permalink  raw  reply  [nested|flat] 440+ messages in thread

* [PATCH v1 2/8] convert ParallelBitmapHeapState->state to an atomic
@ 2026-07-09 18:38 Nathan Bossart <nathan@postgresql.org>
  0 siblings, 0 replies; 440+ messages in thread

From: Nathan Bossart @ 2026-07-09 18:38 UTC (permalink / raw)

---
 src/backend/executor/nodeBitmapHeapscan.c | 21 ++++++---------------
 1 file changed, 6 insertions(+), 15 deletions(-)

diff --git a/src/backend/executor/nodeBitmapHeapscan.c b/src/backend/executor/nodeBitmapHeapscan.c
index 83d6478bc2b..f2bb487bf10 100644
--- a/src/backend/executor/nodeBitmapHeapscan.c
+++ b/src/backend/executor/nodeBitmapHeapscan.c
@@ -79,7 +79,6 @@ typedef enum
 /* ----------------
  *	 ParallelBitmapHeapState information
  *		tbmiterator				iterator for scanning current pages
- *		mutex					mutual exclusion for state
  *		state					current state of the TIDBitmap
  *		cv						conditional wait variable
  * ----------------
@@ -87,8 +86,7 @@ typedef enum
 typedef struct ParallelBitmapHeapState
 {
 	dsa_pointer tbmiterator;
-	slock_t		mutex;
-	SharedBitmapState state;
+	pg_atomic_uint32 state;
 	ConditionVariable cv;
 } ParallelBitmapHeapState;
 
@@ -228,9 +226,7 @@ BitmapHeapNext(BitmapHeapScanState *node)
 static inline void
 BitmapDoneInitializingSharedState(ParallelBitmapHeapState *pstate)
 {
-	SpinLockAcquire(&pstate->mutex);
-	pstate->state = BM_FINISHED;
-	SpinLockRelease(&pstate->mutex);
+	pg_atomic_write_membarrier_u32(&pstate->state, BM_FINISHED);
 	ConditionVariableBroadcast(&pstate->cv);
 }
 
@@ -480,11 +476,8 @@ BitmapShouldInitializeSharedState(ParallelBitmapHeapState *pstate)
 
 	while (1)
 	{
-		SpinLockAcquire(&pstate->mutex);
-		state = pstate->state;
-		if (pstate->state == BM_INITIAL)
-			pstate->state = BM_INPROGRESS;
-		SpinLockRelease(&pstate->mutex);
+		state = BM_INITIAL;
+		pg_atomic_compare_exchange_u32(&pstate->state, &state, BM_INPROGRESS);
 
 		/* Exit if bitmap is done, or if we're the leader. */
 		if (state != BM_INPROGRESS)
@@ -538,9 +531,7 @@ ExecBitmapHeapInitializeDSM(BitmapHeapScanState *node,
 
 	pstate->tbmiterator = 0;
 
-	/* Initialize the mutex */
-	SpinLockInit(&pstate->mutex);
-	pstate->state = BM_INITIAL;
+	pg_atomic_init_u32(&pstate->state, BM_INITIAL);
 
 	ConditionVariableInit(&pstate->cv);
 
@@ -565,7 +556,7 @@ ExecBitmapHeapReInitializeDSM(BitmapHeapScanState *node,
 	if (dsa == NULL)
 		return;
 
-	pstate->state = BM_INITIAL;
+	pg_atomic_write_u32(&pstate->state, BM_INITIAL);
 
 	if (DsaPointerIsValid(pstate->tbmiterator))
 		tbm_free_shared_area(dsa, pstate->tbmiterator);
-- 
2.50.1 (Apple Git-155)


--Ot5x3ffkWEuxilWO
Content-Type: text/plain; charset=us-ascii
Content-Disposition: attachment;
	filename=v1-0003-convert-FixedParallelState-last_xlog_end-to-an-at.patch



^ permalink  raw  reply  [nested|flat] 440+ messages in thread

* [PATCH v1 2/8] convert ParallelBitmapHeapState->state to an atomic
@ 2026-07-09 18:38 Nathan Bossart <nathan@postgresql.org>
  0 siblings, 0 replies; 440+ messages in thread

From: Nathan Bossart @ 2026-07-09 18:38 UTC (permalink / raw)

---
 src/backend/executor/nodeBitmapHeapscan.c | 21 ++++++---------------
 1 file changed, 6 insertions(+), 15 deletions(-)

diff --git a/src/backend/executor/nodeBitmapHeapscan.c b/src/backend/executor/nodeBitmapHeapscan.c
index 83d6478bc2b..f2bb487bf10 100644
--- a/src/backend/executor/nodeBitmapHeapscan.c
+++ b/src/backend/executor/nodeBitmapHeapscan.c
@@ -79,7 +79,6 @@ typedef enum
 /* ----------------
  *	 ParallelBitmapHeapState information
  *		tbmiterator				iterator for scanning current pages
- *		mutex					mutual exclusion for state
  *		state					current state of the TIDBitmap
  *		cv						conditional wait variable
  * ----------------
@@ -87,8 +86,7 @@ typedef enum
 typedef struct ParallelBitmapHeapState
 {
 	dsa_pointer tbmiterator;
-	slock_t		mutex;
-	SharedBitmapState state;
+	pg_atomic_uint32 state;
 	ConditionVariable cv;
 } ParallelBitmapHeapState;
 
@@ -228,9 +226,7 @@ BitmapHeapNext(BitmapHeapScanState *node)
 static inline void
 BitmapDoneInitializingSharedState(ParallelBitmapHeapState *pstate)
 {
-	SpinLockAcquire(&pstate->mutex);
-	pstate->state = BM_FINISHED;
-	SpinLockRelease(&pstate->mutex);
+	pg_atomic_write_membarrier_u32(&pstate->state, BM_FINISHED);
 	ConditionVariableBroadcast(&pstate->cv);
 }
 
@@ -480,11 +476,8 @@ BitmapShouldInitializeSharedState(ParallelBitmapHeapState *pstate)
 
 	while (1)
 	{
-		SpinLockAcquire(&pstate->mutex);
-		state = pstate->state;
-		if (pstate->state == BM_INITIAL)
-			pstate->state = BM_INPROGRESS;
-		SpinLockRelease(&pstate->mutex);
+		state = BM_INITIAL;
+		pg_atomic_compare_exchange_u32(&pstate->state, &state, BM_INPROGRESS);
 
 		/* Exit if bitmap is done, or if we're the leader. */
 		if (state != BM_INPROGRESS)
@@ -538,9 +531,7 @@ ExecBitmapHeapInitializeDSM(BitmapHeapScanState *node,
 
 	pstate->tbmiterator = 0;
 
-	/* Initialize the mutex */
-	SpinLockInit(&pstate->mutex);
-	pstate->state = BM_INITIAL;
+	pg_atomic_init_u32(&pstate->state, BM_INITIAL);
 
 	ConditionVariableInit(&pstate->cv);
 
@@ -565,7 +556,7 @@ ExecBitmapHeapReInitializeDSM(BitmapHeapScanState *node,
 	if (dsa == NULL)
 		return;
 
-	pstate->state = BM_INITIAL;
+	pg_atomic_write_u32(&pstate->state, BM_INITIAL);
 
 	if (DsaPointerIsValid(pstate->tbmiterator))
 		tbm_free_shared_area(dsa, pstate->tbmiterator);
-- 
2.50.1 (Apple Git-155)


--Ot5x3ffkWEuxilWO
Content-Type: text/plain; charset=us-ascii
Content-Disposition: attachment;
	filename=v1-0003-convert-FixedParallelState-last_xlog_end-to-an-at.patch



^ permalink  raw  reply  [nested|flat] 440+ messages in thread

* [PATCH v1 2/8] convert ParallelBitmapHeapState->state to an atomic
@ 2026-07-09 18:38 Nathan Bossart <nathan@postgresql.org>
  0 siblings, 0 replies; 440+ messages in thread

From: Nathan Bossart @ 2026-07-09 18:38 UTC (permalink / raw)

---
 src/backend/executor/nodeBitmapHeapscan.c | 21 ++++++---------------
 1 file changed, 6 insertions(+), 15 deletions(-)

diff --git a/src/backend/executor/nodeBitmapHeapscan.c b/src/backend/executor/nodeBitmapHeapscan.c
index 83d6478bc2b..f2bb487bf10 100644
--- a/src/backend/executor/nodeBitmapHeapscan.c
+++ b/src/backend/executor/nodeBitmapHeapscan.c
@@ -79,7 +79,6 @@ typedef enum
 /* ----------------
  *	 ParallelBitmapHeapState information
  *		tbmiterator				iterator for scanning current pages
- *		mutex					mutual exclusion for state
  *		state					current state of the TIDBitmap
  *		cv						conditional wait variable
  * ----------------
@@ -87,8 +86,7 @@ typedef enum
 typedef struct ParallelBitmapHeapState
 {
 	dsa_pointer tbmiterator;
-	slock_t		mutex;
-	SharedBitmapState state;
+	pg_atomic_uint32 state;
 	ConditionVariable cv;
 } ParallelBitmapHeapState;
 
@@ -228,9 +226,7 @@ BitmapHeapNext(BitmapHeapScanState *node)
 static inline void
 BitmapDoneInitializingSharedState(ParallelBitmapHeapState *pstate)
 {
-	SpinLockAcquire(&pstate->mutex);
-	pstate->state = BM_FINISHED;
-	SpinLockRelease(&pstate->mutex);
+	pg_atomic_write_membarrier_u32(&pstate->state, BM_FINISHED);
 	ConditionVariableBroadcast(&pstate->cv);
 }
 
@@ -480,11 +476,8 @@ BitmapShouldInitializeSharedState(ParallelBitmapHeapState *pstate)
 
 	while (1)
 	{
-		SpinLockAcquire(&pstate->mutex);
-		state = pstate->state;
-		if (pstate->state == BM_INITIAL)
-			pstate->state = BM_INPROGRESS;
-		SpinLockRelease(&pstate->mutex);
+		state = BM_INITIAL;
+		pg_atomic_compare_exchange_u32(&pstate->state, &state, BM_INPROGRESS);
 
 		/* Exit if bitmap is done, or if we're the leader. */
 		if (state != BM_INPROGRESS)
@@ -538,9 +531,7 @@ ExecBitmapHeapInitializeDSM(BitmapHeapScanState *node,
 
 	pstate->tbmiterator = 0;
 
-	/* Initialize the mutex */
-	SpinLockInit(&pstate->mutex);
-	pstate->state = BM_INITIAL;
+	pg_atomic_init_u32(&pstate->state, BM_INITIAL);
 
 	ConditionVariableInit(&pstate->cv);
 
@@ -565,7 +556,7 @@ ExecBitmapHeapReInitializeDSM(BitmapHeapScanState *node,
 	if (dsa == NULL)
 		return;
 
-	pstate->state = BM_INITIAL;
+	pg_atomic_write_u32(&pstate->state, BM_INITIAL);
 
 	if (DsaPointerIsValid(pstate->tbmiterator))
 		tbm_free_shared_area(dsa, pstate->tbmiterator);
-- 
2.50.1 (Apple Git-155)


--Ot5x3ffkWEuxilWO
Content-Type: text/plain; charset=us-ascii
Content-Disposition: attachment;
	filename=v1-0003-convert-FixedParallelState-last_xlog_end-to-an-at.patch



^ permalink  raw  reply  [nested|flat] 440+ messages in thread

* [PATCH v1 2/8] convert ParallelBitmapHeapState->state to an atomic
@ 2026-07-09 18:38 Nathan Bossart <nathan@postgresql.org>
  0 siblings, 0 replies; 440+ messages in thread

From: Nathan Bossart @ 2026-07-09 18:38 UTC (permalink / raw)

---
 src/backend/executor/nodeBitmapHeapscan.c | 21 ++++++---------------
 1 file changed, 6 insertions(+), 15 deletions(-)

diff --git a/src/backend/executor/nodeBitmapHeapscan.c b/src/backend/executor/nodeBitmapHeapscan.c
index 83d6478bc2b..f2bb487bf10 100644
--- a/src/backend/executor/nodeBitmapHeapscan.c
+++ b/src/backend/executor/nodeBitmapHeapscan.c
@@ -79,7 +79,6 @@ typedef enum
 /* ----------------
  *	 ParallelBitmapHeapState information
  *		tbmiterator				iterator for scanning current pages
- *		mutex					mutual exclusion for state
  *		state					current state of the TIDBitmap
  *		cv						conditional wait variable
  * ----------------
@@ -87,8 +86,7 @@ typedef enum
 typedef struct ParallelBitmapHeapState
 {
 	dsa_pointer tbmiterator;
-	slock_t		mutex;
-	SharedBitmapState state;
+	pg_atomic_uint32 state;
 	ConditionVariable cv;
 } ParallelBitmapHeapState;
 
@@ -228,9 +226,7 @@ BitmapHeapNext(BitmapHeapScanState *node)
 static inline void
 BitmapDoneInitializingSharedState(ParallelBitmapHeapState *pstate)
 {
-	SpinLockAcquire(&pstate->mutex);
-	pstate->state = BM_FINISHED;
-	SpinLockRelease(&pstate->mutex);
+	pg_atomic_write_membarrier_u32(&pstate->state, BM_FINISHED);
 	ConditionVariableBroadcast(&pstate->cv);
 }
 
@@ -480,11 +476,8 @@ BitmapShouldInitializeSharedState(ParallelBitmapHeapState *pstate)
 
 	while (1)
 	{
-		SpinLockAcquire(&pstate->mutex);
-		state = pstate->state;
-		if (pstate->state == BM_INITIAL)
-			pstate->state = BM_INPROGRESS;
-		SpinLockRelease(&pstate->mutex);
+		state = BM_INITIAL;
+		pg_atomic_compare_exchange_u32(&pstate->state, &state, BM_INPROGRESS);
 
 		/* Exit if bitmap is done, or if we're the leader. */
 		if (state != BM_INPROGRESS)
@@ -538,9 +531,7 @@ ExecBitmapHeapInitializeDSM(BitmapHeapScanState *node,
 
 	pstate->tbmiterator = 0;
 
-	/* Initialize the mutex */
-	SpinLockInit(&pstate->mutex);
-	pstate->state = BM_INITIAL;
+	pg_atomic_init_u32(&pstate->state, BM_INITIAL);
 
 	ConditionVariableInit(&pstate->cv);
 
@@ -565,7 +556,7 @@ ExecBitmapHeapReInitializeDSM(BitmapHeapScanState *node,
 	if (dsa == NULL)
 		return;
 
-	pstate->state = BM_INITIAL;
+	pg_atomic_write_u32(&pstate->state, BM_INITIAL);
 
 	if (DsaPointerIsValid(pstate->tbmiterator))
 		tbm_free_shared_area(dsa, pstate->tbmiterator);
-- 
2.50.1 (Apple Git-155)


--Ot5x3ffkWEuxilWO
Content-Type: text/plain; charset=us-ascii
Content-Disposition: attachment;
	filename=v1-0003-convert-FixedParallelState-last_xlog_end-to-an-at.patch



^ permalink  raw  reply  [nested|flat] 440+ messages in thread

* [PATCH v1 2/8] convert ParallelBitmapHeapState->state to an atomic
@ 2026-07-09 18:38 Nathan Bossart <nathan@postgresql.org>
  0 siblings, 0 replies; 440+ messages in thread

From: Nathan Bossart @ 2026-07-09 18:38 UTC (permalink / raw)

---
 src/backend/executor/nodeBitmapHeapscan.c | 21 ++++++---------------
 1 file changed, 6 insertions(+), 15 deletions(-)

diff --git a/src/backend/executor/nodeBitmapHeapscan.c b/src/backend/executor/nodeBitmapHeapscan.c
index 83d6478bc2b..f2bb487bf10 100644
--- a/src/backend/executor/nodeBitmapHeapscan.c
+++ b/src/backend/executor/nodeBitmapHeapscan.c
@@ -79,7 +79,6 @@ typedef enum
 /* ----------------
  *	 ParallelBitmapHeapState information
  *		tbmiterator				iterator for scanning current pages
- *		mutex					mutual exclusion for state
  *		state					current state of the TIDBitmap
  *		cv						conditional wait variable
  * ----------------
@@ -87,8 +86,7 @@ typedef enum
 typedef struct ParallelBitmapHeapState
 {
 	dsa_pointer tbmiterator;
-	slock_t		mutex;
-	SharedBitmapState state;
+	pg_atomic_uint32 state;
 	ConditionVariable cv;
 } ParallelBitmapHeapState;
 
@@ -228,9 +226,7 @@ BitmapHeapNext(BitmapHeapScanState *node)
 static inline void
 BitmapDoneInitializingSharedState(ParallelBitmapHeapState *pstate)
 {
-	SpinLockAcquire(&pstate->mutex);
-	pstate->state = BM_FINISHED;
-	SpinLockRelease(&pstate->mutex);
+	pg_atomic_write_membarrier_u32(&pstate->state, BM_FINISHED);
 	ConditionVariableBroadcast(&pstate->cv);
 }
 
@@ -480,11 +476,8 @@ BitmapShouldInitializeSharedState(ParallelBitmapHeapState *pstate)
 
 	while (1)
 	{
-		SpinLockAcquire(&pstate->mutex);
-		state = pstate->state;
-		if (pstate->state == BM_INITIAL)
-			pstate->state = BM_INPROGRESS;
-		SpinLockRelease(&pstate->mutex);
+		state = BM_INITIAL;
+		pg_atomic_compare_exchange_u32(&pstate->state, &state, BM_INPROGRESS);
 
 		/* Exit if bitmap is done, or if we're the leader. */
 		if (state != BM_INPROGRESS)
@@ -538,9 +531,7 @@ ExecBitmapHeapInitializeDSM(BitmapHeapScanState *node,
 
 	pstate->tbmiterator = 0;
 
-	/* Initialize the mutex */
-	SpinLockInit(&pstate->mutex);
-	pstate->state = BM_INITIAL;
+	pg_atomic_init_u32(&pstate->state, BM_INITIAL);
 
 	ConditionVariableInit(&pstate->cv);
 
@@ -565,7 +556,7 @@ ExecBitmapHeapReInitializeDSM(BitmapHeapScanState *node,
 	if (dsa == NULL)
 		return;
 
-	pstate->state = BM_INITIAL;
+	pg_atomic_write_u32(&pstate->state, BM_INITIAL);
 
 	if (DsaPointerIsValid(pstate->tbmiterator))
 		tbm_free_shared_area(dsa, pstate->tbmiterator);
-- 
2.50.1 (Apple Git-155)


--Ot5x3ffkWEuxilWO
Content-Type: text/plain; charset=us-ascii
Content-Disposition: attachment;
	filename=v1-0003-convert-FixedParallelState-last_xlog_end-to-an-at.patch



^ permalink  raw  reply  [nested|flat] 440+ messages in thread

* [PATCH v2 2/9] convert ParallelBitmapHeapState->state to an atomic
@ 2026-07-09 18:38 Nathan Bossart <nathan@postgresql.org>
  0 siblings, 0 replies; 440+ messages in thread

From: Nathan Bossart @ 2026-07-09 18:38 UTC (permalink / raw)

---
 src/backend/executor/nodeBitmapHeapscan.c | 23 +++++++----------------
 1 file changed, 7 insertions(+), 16 deletions(-)

diff --git a/src/backend/executor/nodeBitmapHeapscan.c b/src/backend/executor/nodeBitmapHeapscan.c
index 83d6478bc2b..a9e83f30687 100644
--- a/src/backend/executor/nodeBitmapHeapscan.c
+++ b/src/backend/executor/nodeBitmapHeapscan.c
@@ -79,7 +79,6 @@ typedef enum
 /* ----------------
  *	 ParallelBitmapHeapState information
  *		tbmiterator				iterator for scanning current pages
- *		mutex					mutual exclusion for state
  *		state					current state of the TIDBitmap
  *		cv						conditional wait variable
  * ----------------
@@ -87,8 +86,7 @@ typedef enum
 typedef struct ParallelBitmapHeapState
 {
 	dsa_pointer tbmiterator;
-	slock_t		mutex;
-	SharedBitmapState state;
+	pg_atomic_uint32 state;
 	ConditionVariable cv;
 } ParallelBitmapHeapState;
 
@@ -228,9 +226,7 @@ BitmapHeapNext(BitmapHeapScanState *node)
 static inline void
 BitmapDoneInitializingSharedState(ParallelBitmapHeapState *pstate)
 {
-	SpinLockAcquire(&pstate->mutex);
-	pstate->state = BM_FINISHED;
-	SpinLockRelease(&pstate->mutex);
+	pg_atomic_write_membarrier_u32(&pstate->state, BM_FINISHED);
 	ConditionVariableBroadcast(&pstate->cv);
 }
 
@@ -476,15 +472,12 @@ ExecInitBitmapHeapScan(BitmapHeapScan *node, EState *estate, int eflags)
 static bool
 BitmapShouldInitializeSharedState(ParallelBitmapHeapState *pstate)
 {
-	SharedBitmapState state;
+	uint32		state;
 
 	while (1)
 	{
-		SpinLockAcquire(&pstate->mutex);
-		state = pstate->state;
-		if (pstate->state == BM_INITIAL)
-			pstate->state = BM_INPROGRESS;
-		SpinLockRelease(&pstate->mutex);
+		state = BM_INITIAL;
+		pg_atomic_compare_exchange_u32(&pstate->state, &state, BM_INPROGRESS);
 
 		/* Exit if bitmap is done, or if we're the leader. */
 		if (state != BM_INPROGRESS)
@@ -538,9 +531,7 @@ ExecBitmapHeapInitializeDSM(BitmapHeapScanState *node,
 
 	pstate->tbmiterator = 0;
 
-	/* Initialize the mutex */
-	SpinLockInit(&pstate->mutex);
-	pstate->state = BM_INITIAL;
+	pg_atomic_init_u32(&pstate->state, BM_INITIAL);
 
 	ConditionVariableInit(&pstate->cv);
 
@@ -565,7 +556,7 @@ ExecBitmapHeapReInitializeDSM(BitmapHeapScanState *node,
 	if (dsa == NULL)
 		return;
 
-	pstate->state = BM_INITIAL;
+	pg_atomic_write_u32(&pstate->state, BM_INITIAL);
 
 	if (DsaPointerIsValid(pstate->tbmiterator))
 		tbm_free_shared_area(dsa, pstate->tbmiterator);
-- 
2.50.1 (Apple Git-155)


--Xf36GNcW+0xZNily
Content-Type: text/plain; charset=us-ascii
Content-Disposition: attachment;
	filename=v2-0003-convert-FixedParallelState-last_xlog_end-to-an-at.patch



^ permalink  raw  reply  [nested|flat] 440+ messages in thread

* [PATCH v2 2/9] convert ParallelBitmapHeapState->state to an atomic
@ 2026-07-09 18:38 Nathan Bossart <nathan@postgresql.org>
  0 siblings, 0 replies; 440+ messages in thread

From: Nathan Bossart @ 2026-07-09 18:38 UTC (permalink / raw)

---
 src/backend/executor/nodeBitmapHeapscan.c | 23 +++++++----------------
 1 file changed, 7 insertions(+), 16 deletions(-)

diff --git a/src/backend/executor/nodeBitmapHeapscan.c b/src/backend/executor/nodeBitmapHeapscan.c
index 83d6478bc2b..a9e83f30687 100644
--- a/src/backend/executor/nodeBitmapHeapscan.c
+++ b/src/backend/executor/nodeBitmapHeapscan.c
@@ -79,7 +79,6 @@ typedef enum
 /* ----------------
  *	 ParallelBitmapHeapState information
  *		tbmiterator				iterator for scanning current pages
- *		mutex					mutual exclusion for state
  *		state					current state of the TIDBitmap
  *		cv						conditional wait variable
  * ----------------
@@ -87,8 +86,7 @@ typedef enum
 typedef struct ParallelBitmapHeapState
 {
 	dsa_pointer tbmiterator;
-	slock_t		mutex;
-	SharedBitmapState state;
+	pg_atomic_uint32 state;
 	ConditionVariable cv;
 } ParallelBitmapHeapState;
 
@@ -228,9 +226,7 @@ BitmapHeapNext(BitmapHeapScanState *node)
 static inline void
 BitmapDoneInitializingSharedState(ParallelBitmapHeapState *pstate)
 {
-	SpinLockAcquire(&pstate->mutex);
-	pstate->state = BM_FINISHED;
-	SpinLockRelease(&pstate->mutex);
+	pg_atomic_write_membarrier_u32(&pstate->state, BM_FINISHED);
 	ConditionVariableBroadcast(&pstate->cv);
 }
 
@@ -476,15 +472,12 @@ ExecInitBitmapHeapScan(BitmapHeapScan *node, EState *estate, int eflags)
 static bool
 BitmapShouldInitializeSharedState(ParallelBitmapHeapState *pstate)
 {
-	SharedBitmapState state;
+	uint32		state;
 
 	while (1)
 	{
-		SpinLockAcquire(&pstate->mutex);
-		state = pstate->state;
-		if (pstate->state == BM_INITIAL)
-			pstate->state = BM_INPROGRESS;
-		SpinLockRelease(&pstate->mutex);
+		state = BM_INITIAL;
+		pg_atomic_compare_exchange_u32(&pstate->state, &state, BM_INPROGRESS);
 
 		/* Exit if bitmap is done, or if we're the leader. */
 		if (state != BM_INPROGRESS)
@@ -538,9 +531,7 @@ ExecBitmapHeapInitializeDSM(BitmapHeapScanState *node,
 
 	pstate->tbmiterator = 0;
 
-	/* Initialize the mutex */
-	SpinLockInit(&pstate->mutex);
-	pstate->state = BM_INITIAL;
+	pg_atomic_init_u32(&pstate->state, BM_INITIAL);
 
 	ConditionVariableInit(&pstate->cv);
 
@@ -565,7 +556,7 @@ ExecBitmapHeapReInitializeDSM(BitmapHeapScanState *node,
 	if (dsa == NULL)
 		return;
 
-	pstate->state = BM_INITIAL;
+	pg_atomic_write_u32(&pstate->state, BM_INITIAL);
 
 	if (DsaPointerIsValid(pstate->tbmiterator))
 		tbm_free_shared_area(dsa, pstate->tbmiterator);
-- 
2.50.1 (Apple Git-155)


--Xf36GNcW+0xZNily
Content-Type: text/plain; charset=us-ascii
Content-Disposition: attachment;
	filename=v2-0003-convert-FixedParallelState-last_xlog_end-to-an-at.patch



^ permalink  raw  reply  [nested|flat] 440+ messages in thread

* [PATCH v2 2/9] convert ParallelBitmapHeapState->state to an atomic
@ 2026-07-09 18:38 Nathan Bossart <nathan@postgresql.org>
  0 siblings, 0 replies; 440+ messages in thread

From: Nathan Bossart @ 2026-07-09 18:38 UTC (permalink / raw)

---
 src/backend/executor/nodeBitmapHeapscan.c | 23 +++++++----------------
 1 file changed, 7 insertions(+), 16 deletions(-)

diff --git a/src/backend/executor/nodeBitmapHeapscan.c b/src/backend/executor/nodeBitmapHeapscan.c
index 83d6478bc2b..a9e83f30687 100644
--- a/src/backend/executor/nodeBitmapHeapscan.c
+++ b/src/backend/executor/nodeBitmapHeapscan.c
@@ -79,7 +79,6 @@ typedef enum
 /* ----------------
  *	 ParallelBitmapHeapState information
  *		tbmiterator				iterator for scanning current pages
- *		mutex					mutual exclusion for state
  *		state					current state of the TIDBitmap
  *		cv						conditional wait variable
  * ----------------
@@ -87,8 +86,7 @@ typedef enum
 typedef struct ParallelBitmapHeapState
 {
 	dsa_pointer tbmiterator;
-	slock_t		mutex;
-	SharedBitmapState state;
+	pg_atomic_uint32 state;
 	ConditionVariable cv;
 } ParallelBitmapHeapState;
 
@@ -228,9 +226,7 @@ BitmapHeapNext(BitmapHeapScanState *node)
 static inline void
 BitmapDoneInitializingSharedState(ParallelBitmapHeapState *pstate)
 {
-	SpinLockAcquire(&pstate->mutex);
-	pstate->state = BM_FINISHED;
-	SpinLockRelease(&pstate->mutex);
+	pg_atomic_write_membarrier_u32(&pstate->state, BM_FINISHED);
 	ConditionVariableBroadcast(&pstate->cv);
 }
 
@@ -476,15 +472,12 @@ ExecInitBitmapHeapScan(BitmapHeapScan *node, EState *estate, int eflags)
 static bool
 BitmapShouldInitializeSharedState(ParallelBitmapHeapState *pstate)
 {
-	SharedBitmapState state;
+	uint32		state;
 
 	while (1)
 	{
-		SpinLockAcquire(&pstate->mutex);
-		state = pstate->state;
-		if (pstate->state == BM_INITIAL)
-			pstate->state = BM_INPROGRESS;
-		SpinLockRelease(&pstate->mutex);
+		state = BM_INITIAL;
+		pg_atomic_compare_exchange_u32(&pstate->state, &state, BM_INPROGRESS);
 
 		/* Exit if bitmap is done, or if we're the leader. */
 		if (state != BM_INPROGRESS)
@@ -538,9 +531,7 @@ ExecBitmapHeapInitializeDSM(BitmapHeapScanState *node,
 
 	pstate->tbmiterator = 0;
 
-	/* Initialize the mutex */
-	SpinLockInit(&pstate->mutex);
-	pstate->state = BM_INITIAL;
+	pg_atomic_init_u32(&pstate->state, BM_INITIAL);
 
 	ConditionVariableInit(&pstate->cv);
 
@@ -565,7 +556,7 @@ ExecBitmapHeapReInitializeDSM(BitmapHeapScanState *node,
 	if (dsa == NULL)
 		return;
 
-	pstate->state = BM_INITIAL;
+	pg_atomic_write_u32(&pstate->state, BM_INITIAL);
 
 	if (DsaPointerIsValid(pstate->tbmiterator))
 		tbm_free_shared_area(dsa, pstate->tbmiterator);
-- 
2.50.1 (Apple Git-155)


--Xf36GNcW+0xZNily
Content-Type: text/plain; charset=us-ascii
Content-Disposition: attachment;
	filename=v2-0003-convert-FixedParallelState-last_xlog_end-to-an-at.patch



^ permalink  raw  reply  [nested|flat] 440+ messages in thread

* [PATCH v2 2/9] convert ParallelBitmapHeapState->state to an atomic
@ 2026-07-09 18:38 Nathan Bossart <nathan@postgresql.org>
  0 siblings, 0 replies; 440+ messages in thread

From: Nathan Bossart @ 2026-07-09 18:38 UTC (permalink / raw)

---
 src/backend/executor/nodeBitmapHeapscan.c | 23 +++++++----------------
 1 file changed, 7 insertions(+), 16 deletions(-)

diff --git a/src/backend/executor/nodeBitmapHeapscan.c b/src/backend/executor/nodeBitmapHeapscan.c
index 83d6478bc2b..a9e83f30687 100644
--- a/src/backend/executor/nodeBitmapHeapscan.c
+++ b/src/backend/executor/nodeBitmapHeapscan.c
@@ -79,7 +79,6 @@ typedef enum
 /* ----------------
  *	 ParallelBitmapHeapState information
  *		tbmiterator				iterator for scanning current pages
- *		mutex					mutual exclusion for state
  *		state					current state of the TIDBitmap
  *		cv						conditional wait variable
  * ----------------
@@ -87,8 +86,7 @@ typedef enum
 typedef struct ParallelBitmapHeapState
 {
 	dsa_pointer tbmiterator;
-	slock_t		mutex;
-	SharedBitmapState state;
+	pg_atomic_uint32 state;
 	ConditionVariable cv;
 } ParallelBitmapHeapState;
 
@@ -228,9 +226,7 @@ BitmapHeapNext(BitmapHeapScanState *node)
 static inline void
 BitmapDoneInitializingSharedState(ParallelBitmapHeapState *pstate)
 {
-	SpinLockAcquire(&pstate->mutex);
-	pstate->state = BM_FINISHED;
-	SpinLockRelease(&pstate->mutex);
+	pg_atomic_write_membarrier_u32(&pstate->state, BM_FINISHED);
 	ConditionVariableBroadcast(&pstate->cv);
 }
 
@@ -476,15 +472,12 @@ ExecInitBitmapHeapScan(BitmapHeapScan *node, EState *estate, int eflags)
 static bool
 BitmapShouldInitializeSharedState(ParallelBitmapHeapState *pstate)
 {
-	SharedBitmapState state;
+	uint32		state;
 
 	while (1)
 	{
-		SpinLockAcquire(&pstate->mutex);
-		state = pstate->state;
-		if (pstate->state == BM_INITIAL)
-			pstate->state = BM_INPROGRESS;
-		SpinLockRelease(&pstate->mutex);
+		state = BM_INITIAL;
+		pg_atomic_compare_exchange_u32(&pstate->state, &state, BM_INPROGRESS);
 
 		/* Exit if bitmap is done, or if we're the leader. */
 		if (state != BM_INPROGRESS)
@@ -538,9 +531,7 @@ ExecBitmapHeapInitializeDSM(BitmapHeapScanState *node,
 
 	pstate->tbmiterator = 0;
 
-	/* Initialize the mutex */
-	SpinLockInit(&pstate->mutex);
-	pstate->state = BM_INITIAL;
+	pg_atomic_init_u32(&pstate->state, BM_INITIAL);
 
 	ConditionVariableInit(&pstate->cv);
 
@@ -565,7 +556,7 @@ ExecBitmapHeapReInitializeDSM(BitmapHeapScanState *node,
 	if (dsa == NULL)
 		return;
 
-	pstate->state = BM_INITIAL;
+	pg_atomic_write_u32(&pstate->state, BM_INITIAL);
 
 	if (DsaPointerIsValid(pstate->tbmiterator))
 		tbm_free_shared_area(dsa, pstate->tbmiterator);
-- 
2.50.1 (Apple Git-155)


--Xf36GNcW+0xZNily
Content-Type: text/plain; charset=us-ascii
Content-Disposition: attachment;
	filename=v2-0003-convert-FixedParallelState-last_xlog_end-to-an-at.patch



^ permalink  raw  reply  [nested|flat] 440+ messages in thread

* [PATCH v1 2/8] convert ParallelBitmapHeapState->state to an atomic
@ 2026-07-09 18:38 Nathan Bossart <nathan@postgresql.org>
  0 siblings, 0 replies; 440+ messages in thread

From: Nathan Bossart @ 2026-07-09 18:38 UTC (permalink / raw)

---
 src/backend/executor/nodeBitmapHeapscan.c | 21 ++++++---------------
 1 file changed, 6 insertions(+), 15 deletions(-)

diff --git a/src/backend/executor/nodeBitmapHeapscan.c b/src/backend/executor/nodeBitmapHeapscan.c
index 83d6478bc2b..f2bb487bf10 100644
--- a/src/backend/executor/nodeBitmapHeapscan.c
+++ b/src/backend/executor/nodeBitmapHeapscan.c
@@ -79,7 +79,6 @@ typedef enum
 /* ----------------
  *	 ParallelBitmapHeapState information
  *		tbmiterator				iterator for scanning current pages
- *		mutex					mutual exclusion for state
  *		state					current state of the TIDBitmap
  *		cv						conditional wait variable
  * ----------------
@@ -87,8 +86,7 @@ typedef enum
 typedef struct ParallelBitmapHeapState
 {
 	dsa_pointer tbmiterator;
-	slock_t		mutex;
-	SharedBitmapState state;
+	pg_atomic_uint32 state;
 	ConditionVariable cv;
 } ParallelBitmapHeapState;
 
@@ -228,9 +226,7 @@ BitmapHeapNext(BitmapHeapScanState *node)
 static inline void
 BitmapDoneInitializingSharedState(ParallelBitmapHeapState *pstate)
 {
-	SpinLockAcquire(&pstate->mutex);
-	pstate->state = BM_FINISHED;
-	SpinLockRelease(&pstate->mutex);
+	pg_atomic_write_membarrier_u32(&pstate->state, BM_FINISHED);
 	ConditionVariableBroadcast(&pstate->cv);
 }
 
@@ -480,11 +476,8 @@ BitmapShouldInitializeSharedState(ParallelBitmapHeapState *pstate)
 
 	while (1)
 	{
-		SpinLockAcquire(&pstate->mutex);
-		state = pstate->state;
-		if (pstate->state == BM_INITIAL)
-			pstate->state = BM_INPROGRESS;
-		SpinLockRelease(&pstate->mutex);
+		state = BM_INITIAL;
+		pg_atomic_compare_exchange_u32(&pstate->state, &state, BM_INPROGRESS);
 
 		/* Exit if bitmap is done, or if we're the leader. */
 		if (state != BM_INPROGRESS)
@@ -538,9 +531,7 @@ ExecBitmapHeapInitializeDSM(BitmapHeapScanState *node,
 
 	pstate->tbmiterator = 0;
 
-	/* Initialize the mutex */
-	SpinLockInit(&pstate->mutex);
-	pstate->state = BM_INITIAL;
+	pg_atomic_init_u32(&pstate->state, BM_INITIAL);
 
 	ConditionVariableInit(&pstate->cv);
 
@@ -565,7 +556,7 @@ ExecBitmapHeapReInitializeDSM(BitmapHeapScanState *node,
 	if (dsa == NULL)
 		return;
 
-	pstate->state = BM_INITIAL;
+	pg_atomic_write_u32(&pstate->state, BM_INITIAL);
 
 	if (DsaPointerIsValid(pstate->tbmiterator))
 		tbm_free_shared_area(dsa, pstate->tbmiterator);
-- 
2.50.1 (Apple Git-155)


--Ot5x3ffkWEuxilWO
Content-Type: text/plain; charset=us-ascii
Content-Disposition: attachment;
	filename=v1-0003-convert-FixedParallelState-last_xlog_end-to-an-at.patch



^ permalink  raw  reply  [nested|flat] 440+ messages in thread

* [PATCH v1 2/8] convert ParallelBitmapHeapState->state to an atomic
@ 2026-07-09 18:38 Nathan Bossart <nathan@postgresql.org>
  0 siblings, 0 replies; 440+ messages in thread

From: Nathan Bossart @ 2026-07-09 18:38 UTC (permalink / raw)

---
 src/backend/executor/nodeBitmapHeapscan.c | 21 ++++++---------------
 1 file changed, 6 insertions(+), 15 deletions(-)

diff --git a/src/backend/executor/nodeBitmapHeapscan.c b/src/backend/executor/nodeBitmapHeapscan.c
index 83d6478bc2b..f2bb487bf10 100644
--- a/src/backend/executor/nodeBitmapHeapscan.c
+++ b/src/backend/executor/nodeBitmapHeapscan.c
@@ -79,7 +79,6 @@ typedef enum
 /* ----------------
  *	 ParallelBitmapHeapState information
  *		tbmiterator				iterator for scanning current pages
- *		mutex					mutual exclusion for state
  *		state					current state of the TIDBitmap
  *		cv						conditional wait variable
  * ----------------
@@ -87,8 +86,7 @@ typedef enum
 typedef struct ParallelBitmapHeapState
 {
 	dsa_pointer tbmiterator;
-	slock_t		mutex;
-	SharedBitmapState state;
+	pg_atomic_uint32 state;
 	ConditionVariable cv;
 } ParallelBitmapHeapState;
 
@@ -228,9 +226,7 @@ BitmapHeapNext(BitmapHeapScanState *node)
 static inline void
 BitmapDoneInitializingSharedState(ParallelBitmapHeapState *pstate)
 {
-	SpinLockAcquire(&pstate->mutex);
-	pstate->state = BM_FINISHED;
-	SpinLockRelease(&pstate->mutex);
+	pg_atomic_write_membarrier_u32(&pstate->state, BM_FINISHED);
 	ConditionVariableBroadcast(&pstate->cv);
 }
 
@@ -480,11 +476,8 @@ BitmapShouldInitializeSharedState(ParallelBitmapHeapState *pstate)
 
 	while (1)
 	{
-		SpinLockAcquire(&pstate->mutex);
-		state = pstate->state;
-		if (pstate->state == BM_INITIAL)
-			pstate->state = BM_INPROGRESS;
-		SpinLockRelease(&pstate->mutex);
+		state = BM_INITIAL;
+		pg_atomic_compare_exchange_u32(&pstate->state, &state, BM_INPROGRESS);
 
 		/* Exit if bitmap is done, or if we're the leader. */
 		if (state != BM_INPROGRESS)
@@ -538,9 +531,7 @@ ExecBitmapHeapInitializeDSM(BitmapHeapScanState *node,
 
 	pstate->tbmiterator = 0;
 
-	/* Initialize the mutex */
-	SpinLockInit(&pstate->mutex);
-	pstate->state = BM_INITIAL;
+	pg_atomic_init_u32(&pstate->state, BM_INITIAL);
 
 	ConditionVariableInit(&pstate->cv);
 
@@ -565,7 +556,7 @@ ExecBitmapHeapReInitializeDSM(BitmapHeapScanState *node,
 	if (dsa == NULL)
 		return;
 
-	pstate->state = BM_INITIAL;
+	pg_atomic_write_u32(&pstate->state, BM_INITIAL);
 
 	if (DsaPointerIsValid(pstate->tbmiterator))
 		tbm_free_shared_area(dsa, pstate->tbmiterator);
-- 
2.50.1 (Apple Git-155)


--Ot5x3ffkWEuxilWO
Content-Type: text/plain; charset=us-ascii
Content-Disposition: attachment;
	filename=v1-0003-convert-FixedParallelState-last_xlog_end-to-an-at.patch



^ permalink  raw  reply  [nested|flat] 440+ messages in thread

* [PATCH v1 2/8] convert ParallelBitmapHeapState->state to an atomic
@ 2026-07-09 18:38 Nathan Bossart <nathan@postgresql.org>
  0 siblings, 0 replies; 440+ messages in thread

From: Nathan Bossart @ 2026-07-09 18:38 UTC (permalink / raw)

---
 src/backend/executor/nodeBitmapHeapscan.c | 21 ++++++---------------
 1 file changed, 6 insertions(+), 15 deletions(-)

diff --git a/src/backend/executor/nodeBitmapHeapscan.c b/src/backend/executor/nodeBitmapHeapscan.c
index 83d6478bc2b..f2bb487bf10 100644
--- a/src/backend/executor/nodeBitmapHeapscan.c
+++ b/src/backend/executor/nodeBitmapHeapscan.c
@@ -79,7 +79,6 @@ typedef enum
 /* ----------------
  *	 ParallelBitmapHeapState information
  *		tbmiterator				iterator for scanning current pages
- *		mutex					mutual exclusion for state
  *		state					current state of the TIDBitmap
  *		cv						conditional wait variable
  * ----------------
@@ -87,8 +86,7 @@ typedef enum
 typedef struct ParallelBitmapHeapState
 {
 	dsa_pointer tbmiterator;
-	slock_t		mutex;
-	SharedBitmapState state;
+	pg_atomic_uint32 state;
 	ConditionVariable cv;
 } ParallelBitmapHeapState;
 
@@ -228,9 +226,7 @@ BitmapHeapNext(BitmapHeapScanState *node)
 static inline void
 BitmapDoneInitializingSharedState(ParallelBitmapHeapState *pstate)
 {
-	SpinLockAcquire(&pstate->mutex);
-	pstate->state = BM_FINISHED;
-	SpinLockRelease(&pstate->mutex);
+	pg_atomic_write_membarrier_u32(&pstate->state, BM_FINISHED);
 	ConditionVariableBroadcast(&pstate->cv);
 }
 
@@ -480,11 +476,8 @@ BitmapShouldInitializeSharedState(ParallelBitmapHeapState *pstate)
 
 	while (1)
 	{
-		SpinLockAcquire(&pstate->mutex);
-		state = pstate->state;
-		if (pstate->state == BM_INITIAL)
-			pstate->state = BM_INPROGRESS;
-		SpinLockRelease(&pstate->mutex);
+		state = BM_INITIAL;
+		pg_atomic_compare_exchange_u32(&pstate->state, &state, BM_INPROGRESS);
 
 		/* Exit if bitmap is done, or if we're the leader. */
 		if (state != BM_INPROGRESS)
@@ -538,9 +531,7 @@ ExecBitmapHeapInitializeDSM(BitmapHeapScanState *node,
 
 	pstate->tbmiterator = 0;
 
-	/* Initialize the mutex */
-	SpinLockInit(&pstate->mutex);
-	pstate->state = BM_INITIAL;
+	pg_atomic_init_u32(&pstate->state, BM_INITIAL);
 
 	ConditionVariableInit(&pstate->cv);
 
@@ -565,7 +556,7 @@ ExecBitmapHeapReInitializeDSM(BitmapHeapScanState *node,
 	if (dsa == NULL)
 		return;
 
-	pstate->state = BM_INITIAL;
+	pg_atomic_write_u32(&pstate->state, BM_INITIAL);
 
 	if (DsaPointerIsValid(pstate->tbmiterator))
 		tbm_free_shared_area(dsa, pstate->tbmiterator);
-- 
2.50.1 (Apple Git-155)


--Ot5x3ffkWEuxilWO
Content-Type: text/plain; charset=us-ascii
Content-Disposition: attachment;
	filename=v1-0003-convert-FixedParallelState-last_xlog_end-to-an-at.patch



^ permalink  raw  reply  [nested|flat] 440+ messages in thread

* [PATCH v2 2/9] convert ParallelBitmapHeapState->state to an atomic
@ 2026-07-09 18:38 Nathan Bossart <nathan@postgresql.org>
  0 siblings, 0 replies; 440+ messages in thread

From: Nathan Bossart @ 2026-07-09 18:38 UTC (permalink / raw)

---
 src/backend/executor/nodeBitmapHeapscan.c | 23 +++++++----------------
 1 file changed, 7 insertions(+), 16 deletions(-)

diff --git a/src/backend/executor/nodeBitmapHeapscan.c b/src/backend/executor/nodeBitmapHeapscan.c
index 83d6478bc2b..a9e83f30687 100644
--- a/src/backend/executor/nodeBitmapHeapscan.c
+++ b/src/backend/executor/nodeBitmapHeapscan.c
@@ -79,7 +79,6 @@ typedef enum
 /* ----------------
  *	 ParallelBitmapHeapState information
  *		tbmiterator				iterator for scanning current pages
- *		mutex					mutual exclusion for state
  *		state					current state of the TIDBitmap
  *		cv						conditional wait variable
  * ----------------
@@ -87,8 +86,7 @@ typedef enum
 typedef struct ParallelBitmapHeapState
 {
 	dsa_pointer tbmiterator;
-	slock_t		mutex;
-	SharedBitmapState state;
+	pg_atomic_uint32 state;
 	ConditionVariable cv;
 } ParallelBitmapHeapState;
 
@@ -228,9 +226,7 @@ BitmapHeapNext(BitmapHeapScanState *node)
 static inline void
 BitmapDoneInitializingSharedState(ParallelBitmapHeapState *pstate)
 {
-	SpinLockAcquire(&pstate->mutex);
-	pstate->state = BM_FINISHED;
-	SpinLockRelease(&pstate->mutex);
+	pg_atomic_write_membarrier_u32(&pstate->state, BM_FINISHED);
 	ConditionVariableBroadcast(&pstate->cv);
 }
 
@@ -476,15 +472,12 @@ ExecInitBitmapHeapScan(BitmapHeapScan *node, EState *estate, int eflags)
 static bool
 BitmapShouldInitializeSharedState(ParallelBitmapHeapState *pstate)
 {
-	SharedBitmapState state;
+	uint32		state;
 
 	while (1)
 	{
-		SpinLockAcquire(&pstate->mutex);
-		state = pstate->state;
-		if (pstate->state == BM_INITIAL)
-			pstate->state = BM_INPROGRESS;
-		SpinLockRelease(&pstate->mutex);
+		state = BM_INITIAL;
+		pg_atomic_compare_exchange_u32(&pstate->state, &state, BM_INPROGRESS);
 
 		/* Exit if bitmap is done, or if we're the leader. */
 		if (state != BM_INPROGRESS)
@@ -538,9 +531,7 @@ ExecBitmapHeapInitializeDSM(BitmapHeapScanState *node,
 
 	pstate->tbmiterator = 0;
 
-	/* Initialize the mutex */
-	SpinLockInit(&pstate->mutex);
-	pstate->state = BM_INITIAL;
+	pg_atomic_init_u32(&pstate->state, BM_INITIAL);
 
 	ConditionVariableInit(&pstate->cv);
 
@@ -565,7 +556,7 @@ ExecBitmapHeapReInitializeDSM(BitmapHeapScanState *node,
 	if (dsa == NULL)
 		return;
 
-	pstate->state = BM_INITIAL;
+	pg_atomic_write_u32(&pstate->state, BM_INITIAL);
 
 	if (DsaPointerIsValid(pstate->tbmiterator))
 		tbm_free_shared_area(dsa, pstate->tbmiterator);
-- 
2.50.1 (Apple Git-155)


--Xf36GNcW+0xZNily
Content-Type: text/plain; charset=us-ascii
Content-Disposition: attachment;
	filename=v2-0003-convert-FixedParallelState-last_xlog_end-to-an-at.patch



^ permalink  raw  reply  [nested|flat] 440+ messages in thread

* [PATCH v2 2/9] convert ParallelBitmapHeapState->state to an atomic
@ 2026-07-09 18:38 Nathan Bossart <nathan@postgresql.org>
  0 siblings, 0 replies; 440+ messages in thread

From: Nathan Bossart @ 2026-07-09 18:38 UTC (permalink / raw)

---
 src/backend/executor/nodeBitmapHeapscan.c | 23 +++++++----------------
 1 file changed, 7 insertions(+), 16 deletions(-)

diff --git a/src/backend/executor/nodeBitmapHeapscan.c b/src/backend/executor/nodeBitmapHeapscan.c
index 83d6478bc2b..a9e83f30687 100644
--- a/src/backend/executor/nodeBitmapHeapscan.c
+++ b/src/backend/executor/nodeBitmapHeapscan.c
@@ -79,7 +79,6 @@ typedef enum
 /* ----------------
  *	 ParallelBitmapHeapState information
  *		tbmiterator				iterator for scanning current pages
- *		mutex					mutual exclusion for state
  *		state					current state of the TIDBitmap
  *		cv						conditional wait variable
  * ----------------
@@ -87,8 +86,7 @@ typedef enum
 typedef struct ParallelBitmapHeapState
 {
 	dsa_pointer tbmiterator;
-	slock_t		mutex;
-	SharedBitmapState state;
+	pg_atomic_uint32 state;
 	ConditionVariable cv;
 } ParallelBitmapHeapState;
 
@@ -228,9 +226,7 @@ BitmapHeapNext(BitmapHeapScanState *node)
 static inline void
 BitmapDoneInitializingSharedState(ParallelBitmapHeapState *pstate)
 {
-	SpinLockAcquire(&pstate->mutex);
-	pstate->state = BM_FINISHED;
-	SpinLockRelease(&pstate->mutex);
+	pg_atomic_write_membarrier_u32(&pstate->state, BM_FINISHED);
 	ConditionVariableBroadcast(&pstate->cv);
 }
 
@@ -476,15 +472,12 @@ ExecInitBitmapHeapScan(BitmapHeapScan *node, EState *estate, int eflags)
 static bool
 BitmapShouldInitializeSharedState(ParallelBitmapHeapState *pstate)
 {
-	SharedBitmapState state;
+	uint32		state;
 
 	while (1)
 	{
-		SpinLockAcquire(&pstate->mutex);
-		state = pstate->state;
-		if (pstate->state == BM_INITIAL)
-			pstate->state = BM_INPROGRESS;
-		SpinLockRelease(&pstate->mutex);
+		state = BM_INITIAL;
+		pg_atomic_compare_exchange_u32(&pstate->state, &state, BM_INPROGRESS);
 
 		/* Exit if bitmap is done, or if we're the leader. */
 		if (state != BM_INPROGRESS)
@@ -538,9 +531,7 @@ ExecBitmapHeapInitializeDSM(BitmapHeapScanState *node,
 
 	pstate->tbmiterator = 0;
 
-	/* Initialize the mutex */
-	SpinLockInit(&pstate->mutex);
-	pstate->state = BM_INITIAL;
+	pg_atomic_init_u32(&pstate->state, BM_INITIAL);
 
 	ConditionVariableInit(&pstate->cv);
 
@@ -565,7 +556,7 @@ ExecBitmapHeapReInitializeDSM(BitmapHeapScanState *node,
 	if (dsa == NULL)
 		return;
 
-	pstate->state = BM_INITIAL;
+	pg_atomic_write_u32(&pstate->state, BM_INITIAL);
 
 	if (DsaPointerIsValid(pstate->tbmiterator))
 		tbm_free_shared_area(dsa, pstate->tbmiterator);
-- 
2.50.1 (Apple Git-155)


--Xf36GNcW+0xZNily
Content-Type: text/plain; charset=us-ascii
Content-Disposition: attachment;
	filename=v2-0003-convert-FixedParallelState-last_xlog_end-to-an-at.patch



^ permalink  raw  reply  [nested|flat] 440+ messages in thread

* [PATCH v2 2/9] convert ParallelBitmapHeapState->state to an atomic
@ 2026-07-09 18:38 Nathan Bossart <nathan@postgresql.org>
  0 siblings, 0 replies; 440+ messages in thread

From: Nathan Bossart @ 2026-07-09 18:38 UTC (permalink / raw)

---
 src/backend/executor/nodeBitmapHeapscan.c | 23 +++++++----------------
 1 file changed, 7 insertions(+), 16 deletions(-)

diff --git a/src/backend/executor/nodeBitmapHeapscan.c b/src/backend/executor/nodeBitmapHeapscan.c
index 83d6478bc2b..a9e83f30687 100644
--- a/src/backend/executor/nodeBitmapHeapscan.c
+++ b/src/backend/executor/nodeBitmapHeapscan.c
@@ -79,7 +79,6 @@ typedef enum
 /* ----------------
  *	 ParallelBitmapHeapState information
  *		tbmiterator				iterator for scanning current pages
- *		mutex					mutual exclusion for state
  *		state					current state of the TIDBitmap
  *		cv						conditional wait variable
  * ----------------
@@ -87,8 +86,7 @@ typedef enum
 typedef struct ParallelBitmapHeapState
 {
 	dsa_pointer tbmiterator;
-	slock_t		mutex;
-	SharedBitmapState state;
+	pg_atomic_uint32 state;
 	ConditionVariable cv;
 } ParallelBitmapHeapState;
 
@@ -228,9 +226,7 @@ BitmapHeapNext(BitmapHeapScanState *node)
 static inline void
 BitmapDoneInitializingSharedState(ParallelBitmapHeapState *pstate)
 {
-	SpinLockAcquire(&pstate->mutex);
-	pstate->state = BM_FINISHED;
-	SpinLockRelease(&pstate->mutex);
+	pg_atomic_write_membarrier_u32(&pstate->state, BM_FINISHED);
 	ConditionVariableBroadcast(&pstate->cv);
 }
 
@@ -476,15 +472,12 @@ ExecInitBitmapHeapScan(BitmapHeapScan *node, EState *estate, int eflags)
 static bool
 BitmapShouldInitializeSharedState(ParallelBitmapHeapState *pstate)
 {
-	SharedBitmapState state;
+	uint32		state;
 
 	while (1)
 	{
-		SpinLockAcquire(&pstate->mutex);
-		state = pstate->state;
-		if (pstate->state == BM_INITIAL)
-			pstate->state = BM_INPROGRESS;
-		SpinLockRelease(&pstate->mutex);
+		state = BM_INITIAL;
+		pg_atomic_compare_exchange_u32(&pstate->state, &state, BM_INPROGRESS);
 
 		/* Exit if bitmap is done, or if we're the leader. */
 		if (state != BM_INPROGRESS)
@@ -538,9 +531,7 @@ ExecBitmapHeapInitializeDSM(BitmapHeapScanState *node,
 
 	pstate->tbmiterator = 0;
 
-	/* Initialize the mutex */
-	SpinLockInit(&pstate->mutex);
-	pstate->state = BM_INITIAL;
+	pg_atomic_init_u32(&pstate->state, BM_INITIAL);
 
 	ConditionVariableInit(&pstate->cv);
 
@@ -565,7 +556,7 @@ ExecBitmapHeapReInitializeDSM(BitmapHeapScanState *node,
 	if (dsa == NULL)
 		return;
 
-	pstate->state = BM_INITIAL;
+	pg_atomic_write_u32(&pstate->state, BM_INITIAL);
 
 	if (DsaPointerIsValid(pstate->tbmiterator))
 		tbm_free_shared_area(dsa, pstate->tbmiterator);
-- 
2.50.1 (Apple Git-155)


--Xf36GNcW+0xZNily
Content-Type: text/plain; charset=us-ascii
Content-Disposition: attachment;
	filename=v2-0003-convert-FixedParallelState-last_xlog_end-to-an-at.patch



^ permalink  raw  reply  [nested|flat] 440+ messages in thread

* [PATCH v2 2/9] convert ParallelBitmapHeapState->state to an atomic
@ 2026-07-09 18:38 Nathan Bossart <nathan@postgresql.org>
  0 siblings, 0 replies; 440+ messages in thread

From: Nathan Bossart @ 2026-07-09 18:38 UTC (permalink / raw)

---
 src/backend/executor/nodeBitmapHeapscan.c | 23 +++++++----------------
 1 file changed, 7 insertions(+), 16 deletions(-)

diff --git a/src/backend/executor/nodeBitmapHeapscan.c b/src/backend/executor/nodeBitmapHeapscan.c
index 83d6478bc2b..a9e83f30687 100644
--- a/src/backend/executor/nodeBitmapHeapscan.c
+++ b/src/backend/executor/nodeBitmapHeapscan.c
@@ -79,7 +79,6 @@ typedef enum
 /* ----------------
  *	 ParallelBitmapHeapState information
  *		tbmiterator				iterator for scanning current pages
- *		mutex					mutual exclusion for state
  *		state					current state of the TIDBitmap
  *		cv						conditional wait variable
  * ----------------
@@ -87,8 +86,7 @@ typedef enum
 typedef struct ParallelBitmapHeapState
 {
 	dsa_pointer tbmiterator;
-	slock_t		mutex;
-	SharedBitmapState state;
+	pg_atomic_uint32 state;
 	ConditionVariable cv;
 } ParallelBitmapHeapState;
 
@@ -228,9 +226,7 @@ BitmapHeapNext(BitmapHeapScanState *node)
 static inline void
 BitmapDoneInitializingSharedState(ParallelBitmapHeapState *pstate)
 {
-	SpinLockAcquire(&pstate->mutex);
-	pstate->state = BM_FINISHED;
-	SpinLockRelease(&pstate->mutex);
+	pg_atomic_write_membarrier_u32(&pstate->state, BM_FINISHED);
 	ConditionVariableBroadcast(&pstate->cv);
 }
 
@@ -476,15 +472,12 @@ ExecInitBitmapHeapScan(BitmapHeapScan *node, EState *estate, int eflags)
 static bool
 BitmapShouldInitializeSharedState(ParallelBitmapHeapState *pstate)
 {
-	SharedBitmapState state;
+	uint32		state;
 
 	while (1)
 	{
-		SpinLockAcquire(&pstate->mutex);
-		state = pstate->state;
-		if (pstate->state == BM_INITIAL)
-			pstate->state = BM_INPROGRESS;
-		SpinLockRelease(&pstate->mutex);
+		state = BM_INITIAL;
+		pg_atomic_compare_exchange_u32(&pstate->state, &state, BM_INPROGRESS);
 
 		/* Exit if bitmap is done, or if we're the leader. */
 		if (state != BM_INPROGRESS)
@@ -538,9 +531,7 @@ ExecBitmapHeapInitializeDSM(BitmapHeapScanState *node,
 
 	pstate->tbmiterator = 0;
 
-	/* Initialize the mutex */
-	SpinLockInit(&pstate->mutex);
-	pstate->state = BM_INITIAL;
+	pg_atomic_init_u32(&pstate->state, BM_INITIAL);
 
 	ConditionVariableInit(&pstate->cv);
 
@@ -565,7 +556,7 @@ ExecBitmapHeapReInitializeDSM(BitmapHeapScanState *node,
 	if (dsa == NULL)
 		return;
 
-	pstate->state = BM_INITIAL;
+	pg_atomic_write_u32(&pstate->state, BM_INITIAL);
 
 	if (DsaPointerIsValid(pstate->tbmiterator))
 		tbm_free_shared_area(dsa, pstate->tbmiterator);
-- 
2.50.1 (Apple Git-155)


--Xf36GNcW+0xZNily
Content-Type: text/plain; charset=us-ascii
Content-Disposition: attachment;
	filename=v2-0003-convert-FixedParallelState-last_xlog_end-to-an-at.patch



^ permalink  raw  reply  [nested|flat] 440+ messages in thread

* [PATCH v2 2/9] convert ParallelBitmapHeapState->state to an atomic
@ 2026-07-09 18:38 Nathan Bossart <nathan@postgresql.org>
  0 siblings, 0 replies; 440+ messages in thread

From: Nathan Bossart @ 2026-07-09 18:38 UTC (permalink / raw)

---
 src/backend/executor/nodeBitmapHeapscan.c | 23 +++++++----------------
 1 file changed, 7 insertions(+), 16 deletions(-)

diff --git a/src/backend/executor/nodeBitmapHeapscan.c b/src/backend/executor/nodeBitmapHeapscan.c
index 83d6478bc2b..a9e83f30687 100644
--- a/src/backend/executor/nodeBitmapHeapscan.c
+++ b/src/backend/executor/nodeBitmapHeapscan.c
@@ -79,7 +79,6 @@ typedef enum
 /* ----------------
  *	 ParallelBitmapHeapState information
  *		tbmiterator				iterator for scanning current pages
- *		mutex					mutual exclusion for state
  *		state					current state of the TIDBitmap
  *		cv						conditional wait variable
  * ----------------
@@ -87,8 +86,7 @@ typedef enum
 typedef struct ParallelBitmapHeapState
 {
 	dsa_pointer tbmiterator;
-	slock_t		mutex;
-	SharedBitmapState state;
+	pg_atomic_uint32 state;
 	ConditionVariable cv;
 } ParallelBitmapHeapState;
 
@@ -228,9 +226,7 @@ BitmapHeapNext(BitmapHeapScanState *node)
 static inline void
 BitmapDoneInitializingSharedState(ParallelBitmapHeapState *pstate)
 {
-	SpinLockAcquire(&pstate->mutex);
-	pstate->state = BM_FINISHED;
-	SpinLockRelease(&pstate->mutex);
+	pg_atomic_write_membarrier_u32(&pstate->state, BM_FINISHED);
 	ConditionVariableBroadcast(&pstate->cv);
 }
 
@@ -476,15 +472,12 @@ ExecInitBitmapHeapScan(BitmapHeapScan *node, EState *estate, int eflags)
 static bool
 BitmapShouldInitializeSharedState(ParallelBitmapHeapState *pstate)
 {
-	SharedBitmapState state;
+	uint32		state;
 
 	while (1)
 	{
-		SpinLockAcquire(&pstate->mutex);
-		state = pstate->state;
-		if (pstate->state == BM_INITIAL)
-			pstate->state = BM_INPROGRESS;
-		SpinLockRelease(&pstate->mutex);
+		state = BM_INITIAL;
+		pg_atomic_compare_exchange_u32(&pstate->state, &state, BM_INPROGRESS);
 
 		/* Exit if bitmap is done, or if we're the leader. */
 		if (state != BM_INPROGRESS)
@@ -538,9 +531,7 @@ ExecBitmapHeapInitializeDSM(BitmapHeapScanState *node,
 
 	pstate->tbmiterator = 0;
 
-	/* Initialize the mutex */
-	SpinLockInit(&pstate->mutex);
-	pstate->state = BM_INITIAL;
+	pg_atomic_init_u32(&pstate->state, BM_INITIAL);
 
 	ConditionVariableInit(&pstate->cv);
 
@@ -565,7 +556,7 @@ ExecBitmapHeapReInitializeDSM(BitmapHeapScanState *node,
 	if (dsa == NULL)
 		return;
 
-	pstate->state = BM_INITIAL;
+	pg_atomic_write_u32(&pstate->state, BM_INITIAL);
 
 	if (DsaPointerIsValid(pstate->tbmiterator))
 		tbm_free_shared_area(dsa, pstate->tbmiterator);
-- 
2.50.1 (Apple Git-155)


--Xf36GNcW+0xZNily
Content-Type: text/plain; charset=us-ascii
Content-Disposition: attachment;
	filename=v2-0003-convert-FixedParallelState-last_xlog_end-to-an-at.patch



^ permalink  raw  reply  [nested|flat] 440+ messages in thread

* [PATCH v2 2/9] convert ParallelBitmapHeapState->state to an atomic
@ 2026-07-09 18:38 Nathan Bossart <nathan@postgresql.org>
  0 siblings, 0 replies; 440+ messages in thread

From: Nathan Bossart @ 2026-07-09 18:38 UTC (permalink / raw)

---
 src/backend/executor/nodeBitmapHeapscan.c | 23 +++++++----------------
 1 file changed, 7 insertions(+), 16 deletions(-)

diff --git a/src/backend/executor/nodeBitmapHeapscan.c b/src/backend/executor/nodeBitmapHeapscan.c
index 83d6478bc2b..a9e83f30687 100644
--- a/src/backend/executor/nodeBitmapHeapscan.c
+++ b/src/backend/executor/nodeBitmapHeapscan.c
@@ -79,7 +79,6 @@ typedef enum
 /* ----------------
  *	 ParallelBitmapHeapState information
  *		tbmiterator				iterator for scanning current pages
- *		mutex					mutual exclusion for state
  *		state					current state of the TIDBitmap
  *		cv						conditional wait variable
  * ----------------
@@ -87,8 +86,7 @@ typedef enum
 typedef struct ParallelBitmapHeapState
 {
 	dsa_pointer tbmiterator;
-	slock_t		mutex;
-	SharedBitmapState state;
+	pg_atomic_uint32 state;
 	ConditionVariable cv;
 } ParallelBitmapHeapState;
 
@@ -228,9 +226,7 @@ BitmapHeapNext(BitmapHeapScanState *node)
 static inline void
 BitmapDoneInitializingSharedState(ParallelBitmapHeapState *pstate)
 {
-	SpinLockAcquire(&pstate->mutex);
-	pstate->state = BM_FINISHED;
-	SpinLockRelease(&pstate->mutex);
+	pg_atomic_write_membarrier_u32(&pstate->state, BM_FINISHED);
 	ConditionVariableBroadcast(&pstate->cv);
 }
 
@@ -476,15 +472,12 @@ ExecInitBitmapHeapScan(BitmapHeapScan *node, EState *estate, int eflags)
 static bool
 BitmapShouldInitializeSharedState(ParallelBitmapHeapState *pstate)
 {
-	SharedBitmapState state;
+	uint32		state;
 
 	while (1)
 	{
-		SpinLockAcquire(&pstate->mutex);
-		state = pstate->state;
-		if (pstate->state == BM_INITIAL)
-			pstate->state = BM_INPROGRESS;
-		SpinLockRelease(&pstate->mutex);
+		state = BM_INITIAL;
+		pg_atomic_compare_exchange_u32(&pstate->state, &state, BM_INPROGRESS);
 
 		/* Exit if bitmap is done, or if we're the leader. */
 		if (state != BM_INPROGRESS)
@@ -538,9 +531,7 @@ ExecBitmapHeapInitializeDSM(BitmapHeapScanState *node,
 
 	pstate->tbmiterator = 0;
 
-	/* Initialize the mutex */
-	SpinLockInit(&pstate->mutex);
-	pstate->state = BM_INITIAL;
+	pg_atomic_init_u32(&pstate->state, BM_INITIAL);
 
 	ConditionVariableInit(&pstate->cv);
 
@@ -565,7 +556,7 @@ ExecBitmapHeapReInitializeDSM(BitmapHeapScanState *node,
 	if (dsa == NULL)
 		return;
 
-	pstate->state = BM_INITIAL;
+	pg_atomic_write_u32(&pstate->state, BM_INITIAL);
 
 	if (DsaPointerIsValid(pstate->tbmiterator))
 		tbm_free_shared_area(dsa, pstate->tbmiterator);
-- 
2.50.1 (Apple Git-155)


--Xf36GNcW+0xZNily
Content-Type: text/plain; charset=us-ascii
Content-Disposition: attachment;
	filename=v2-0003-convert-FixedParallelState-last_xlog_end-to-an-at.patch



^ permalink  raw  reply  [nested|flat] 440+ messages in thread

* [PATCH v1 2/8] convert ParallelBitmapHeapState->state to an atomic
@ 2026-07-09 18:38 Nathan Bossart <nathan@postgresql.org>
  0 siblings, 0 replies; 440+ messages in thread

From: Nathan Bossart @ 2026-07-09 18:38 UTC (permalink / raw)

---
 src/backend/executor/nodeBitmapHeapscan.c | 21 ++++++---------------
 1 file changed, 6 insertions(+), 15 deletions(-)

diff --git a/src/backend/executor/nodeBitmapHeapscan.c b/src/backend/executor/nodeBitmapHeapscan.c
index 83d6478bc2b..f2bb487bf10 100644
--- a/src/backend/executor/nodeBitmapHeapscan.c
+++ b/src/backend/executor/nodeBitmapHeapscan.c
@@ -79,7 +79,6 @@ typedef enum
 /* ----------------
  *	 ParallelBitmapHeapState information
  *		tbmiterator				iterator for scanning current pages
- *		mutex					mutual exclusion for state
  *		state					current state of the TIDBitmap
  *		cv						conditional wait variable
  * ----------------
@@ -87,8 +86,7 @@ typedef enum
 typedef struct ParallelBitmapHeapState
 {
 	dsa_pointer tbmiterator;
-	slock_t		mutex;
-	SharedBitmapState state;
+	pg_atomic_uint32 state;
 	ConditionVariable cv;
 } ParallelBitmapHeapState;
 
@@ -228,9 +226,7 @@ BitmapHeapNext(BitmapHeapScanState *node)
 static inline void
 BitmapDoneInitializingSharedState(ParallelBitmapHeapState *pstate)
 {
-	SpinLockAcquire(&pstate->mutex);
-	pstate->state = BM_FINISHED;
-	SpinLockRelease(&pstate->mutex);
+	pg_atomic_write_membarrier_u32(&pstate->state, BM_FINISHED);
 	ConditionVariableBroadcast(&pstate->cv);
 }
 
@@ -480,11 +476,8 @@ BitmapShouldInitializeSharedState(ParallelBitmapHeapState *pstate)
 
 	while (1)
 	{
-		SpinLockAcquire(&pstate->mutex);
-		state = pstate->state;
-		if (pstate->state == BM_INITIAL)
-			pstate->state = BM_INPROGRESS;
-		SpinLockRelease(&pstate->mutex);
+		state = BM_INITIAL;
+		pg_atomic_compare_exchange_u32(&pstate->state, &state, BM_INPROGRESS);
 
 		/* Exit if bitmap is done, or if we're the leader. */
 		if (state != BM_INPROGRESS)
@@ -538,9 +531,7 @@ ExecBitmapHeapInitializeDSM(BitmapHeapScanState *node,
 
 	pstate->tbmiterator = 0;
 
-	/* Initialize the mutex */
-	SpinLockInit(&pstate->mutex);
-	pstate->state = BM_INITIAL;
+	pg_atomic_init_u32(&pstate->state, BM_INITIAL);
 
 	ConditionVariableInit(&pstate->cv);
 
@@ -565,7 +556,7 @@ ExecBitmapHeapReInitializeDSM(BitmapHeapScanState *node,
 	if (dsa == NULL)
 		return;
 
-	pstate->state = BM_INITIAL;
+	pg_atomic_write_u32(&pstate->state, BM_INITIAL);
 
 	if (DsaPointerIsValid(pstate->tbmiterator))
 		tbm_free_shared_area(dsa, pstate->tbmiterator);
-- 
2.50.1 (Apple Git-155)


--Ot5x3ffkWEuxilWO
Content-Type: text/plain; charset=us-ascii
Content-Disposition: attachment;
	filename=v1-0003-convert-FixedParallelState-last_xlog_end-to-an-at.patch



^ permalink  raw  reply  [nested|flat] 440+ messages in thread

* [PATCH v1 2/8] convert ParallelBitmapHeapState->state to an atomic
@ 2026-07-09 18:38 Nathan Bossart <nathan@postgresql.org>
  0 siblings, 0 replies; 440+ messages in thread

From: Nathan Bossart @ 2026-07-09 18:38 UTC (permalink / raw)

---
 src/backend/executor/nodeBitmapHeapscan.c | 21 ++++++---------------
 1 file changed, 6 insertions(+), 15 deletions(-)

diff --git a/src/backend/executor/nodeBitmapHeapscan.c b/src/backend/executor/nodeBitmapHeapscan.c
index 83d6478bc2b..f2bb487bf10 100644
--- a/src/backend/executor/nodeBitmapHeapscan.c
+++ b/src/backend/executor/nodeBitmapHeapscan.c
@@ -79,7 +79,6 @@ typedef enum
 /* ----------------
  *	 ParallelBitmapHeapState information
  *		tbmiterator				iterator for scanning current pages
- *		mutex					mutual exclusion for state
  *		state					current state of the TIDBitmap
  *		cv						conditional wait variable
  * ----------------
@@ -87,8 +86,7 @@ typedef enum
 typedef struct ParallelBitmapHeapState
 {
 	dsa_pointer tbmiterator;
-	slock_t		mutex;
-	SharedBitmapState state;
+	pg_atomic_uint32 state;
 	ConditionVariable cv;
 } ParallelBitmapHeapState;
 
@@ -228,9 +226,7 @@ BitmapHeapNext(BitmapHeapScanState *node)
 static inline void
 BitmapDoneInitializingSharedState(ParallelBitmapHeapState *pstate)
 {
-	SpinLockAcquire(&pstate->mutex);
-	pstate->state = BM_FINISHED;
-	SpinLockRelease(&pstate->mutex);
+	pg_atomic_write_membarrier_u32(&pstate->state, BM_FINISHED);
 	ConditionVariableBroadcast(&pstate->cv);
 }
 
@@ -480,11 +476,8 @@ BitmapShouldInitializeSharedState(ParallelBitmapHeapState *pstate)
 
 	while (1)
 	{
-		SpinLockAcquire(&pstate->mutex);
-		state = pstate->state;
-		if (pstate->state == BM_INITIAL)
-			pstate->state = BM_INPROGRESS;
-		SpinLockRelease(&pstate->mutex);
+		state = BM_INITIAL;
+		pg_atomic_compare_exchange_u32(&pstate->state, &state, BM_INPROGRESS);
 
 		/* Exit if bitmap is done, or if we're the leader. */
 		if (state != BM_INPROGRESS)
@@ -538,9 +531,7 @@ ExecBitmapHeapInitializeDSM(BitmapHeapScanState *node,
 
 	pstate->tbmiterator = 0;
 
-	/* Initialize the mutex */
-	SpinLockInit(&pstate->mutex);
-	pstate->state = BM_INITIAL;
+	pg_atomic_init_u32(&pstate->state, BM_INITIAL);
 
 	ConditionVariableInit(&pstate->cv);
 
@@ -565,7 +556,7 @@ ExecBitmapHeapReInitializeDSM(BitmapHeapScanState *node,
 	if (dsa == NULL)
 		return;
 
-	pstate->state = BM_INITIAL;
+	pg_atomic_write_u32(&pstate->state, BM_INITIAL);
 
 	if (DsaPointerIsValid(pstate->tbmiterator))
 		tbm_free_shared_area(dsa, pstate->tbmiterator);
-- 
2.50.1 (Apple Git-155)


--Ot5x3ffkWEuxilWO
Content-Type: text/plain; charset=us-ascii
Content-Disposition: attachment;
	filename=v1-0003-convert-FixedParallelState-last_xlog_end-to-an-at.patch



^ permalink  raw  reply  [nested|flat] 440+ messages in thread

* [PATCH v1 2/8] convert ParallelBitmapHeapState->state to an atomic
@ 2026-07-09 18:38 Nathan Bossart <nathan@postgresql.org>
  0 siblings, 0 replies; 440+ messages in thread

From: Nathan Bossart @ 2026-07-09 18:38 UTC (permalink / raw)

---
 src/backend/executor/nodeBitmapHeapscan.c | 21 ++++++---------------
 1 file changed, 6 insertions(+), 15 deletions(-)

diff --git a/src/backend/executor/nodeBitmapHeapscan.c b/src/backend/executor/nodeBitmapHeapscan.c
index 83d6478bc2b..f2bb487bf10 100644
--- a/src/backend/executor/nodeBitmapHeapscan.c
+++ b/src/backend/executor/nodeBitmapHeapscan.c
@@ -79,7 +79,6 @@ typedef enum
 /* ----------------
  *	 ParallelBitmapHeapState information
  *		tbmiterator				iterator for scanning current pages
- *		mutex					mutual exclusion for state
  *		state					current state of the TIDBitmap
  *		cv						conditional wait variable
  * ----------------
@@ -87,8 +86,7 @@ typedef enum
 typedef struct ParallelBitmapHeapState
 {
 	dsa_pointer tbmiterator;
-	slock_t		mutex;
-	SharedBitmapState state;
+	pg_atomic_uint32 state;
 	ConditionVariable cv;
 } ParallelBitmapHeapState;
 
@@ -228,9 +226,7 @@ BitmapHeapNext(BitmapHeapScanState *node)
 static inline void
 BitmapDoneInitializingSharedState(ParallelBitmapHeapState *pstate)
 {
-	SpinLockAcquire(&pstate->mutex);
-	pstate->state = BM_FINISHED;
-	SpinLockRelease(&pstate->mutex);
+	pg_atomic_write_membarrier_u32(&pstate->state, BM_FINISHED);
 	ConditionVariableBroadcast(&pstate->cv);
 }
 
@@ -480,11 +476,8 @@ BitmapShouldInitializeSharedState(ParallelBitmapHeapState *pstate)
 
 	while (1)
 	{
-		SpinLockAcquire(&pstate->mutex);
-		state = pstate->state;
-		if (pstate->state == BM_INITIAL)
-			pstate->state = BM_INPROGRESS;
-		SpinLockRelease(&pstate->mutex);
+		state = BM_INITIAL;
+		pg_atomic_compare_exchange_u32(&pstate->state, &state, BM_INPROGRESS);
 
 		/* Exit if bitmap is done, or if we're the leader. */
 		if (state != BM_INPROGRESS)
@@ -538,9 +531,7 @@ ExecBitmapHeapInitializeDSM(BitmapHeapScanState *node,
 
 	pstate->tbmiterator = 0;
 
-	/* Initialize the mutex */
-	SpinLockInit(&pstate->mutex);
-	pstate->state = BM_INITIAL;
+	pg_atomic_init_u32(&pstate->state, BM_INITIAL);
 
 	ConditionVariableInit(&pstate->cv);
 
@@ -565,7 +556,7 @@ ExecBitmapHeapReInitializeDSM(BitmapHeapScanState *node,
 	if (dsa == NULL)
 		return;
 
-	pstate->state = BM_INITIAL;
+	pg_atomic_write_u32(&pstate->state, BM_INITIAL);
 
 	if (DsaPointerIsValid(pstate->tbmiterator))
 		tbm_free_shared_area(dsa, pstate->tbmiterator);
-- 
2.50.1 (Apple Git-155)


--Ot5x3ffkWEuxilWO
Content-Type: text/plain; charset=us-ascii
Content-Disposition: attachment;
	filename=v1-0003-convert-FixedParallelState-last_xlog_end-to-an-at.patch



^ permalink  raw  reply  [nested|flat] 440+ messages in thread

* [PATCH v1 2/8] convert ParallelBitmapHeapState->state to an atomic
@ 2026-07-09 18:38 Nathan Bossart <nathan@postgresql.org>
  0 siblings, 0 replies; 440+ messages in thread

From: Nathan Bossart @ 2026-07-09 18:38 UTC (permalink / raw)

---
 src/backend/executor/nodeBitmapHeapscan.c | 21 ++++++---------------
 1 file changed, 6 insertions(+), 15 deletions(-)

diff --git a/src/backend/executor/nodeBitmapHeapscan.c b/src/backend/executor/nodeBitmapHeapscan.c
index 83d6478bc2b..f2bb487bf10 100644
--- a/src/backend/executor/nodeBitmapHeapscan.c
+++ b/src/backend/executor/nodeBitmapHeapscan.c
@@ -79,7 +79,6 @@ typedef enum
 /* ----------------
  *	 ParallelBitmapHeapState information
  *		tbmiterator				iterator for scanning current pages
- *		mutex					mutual exclusion for state
  *		state					current state of the TIDBitmap
  *		cv						conditional wait variable
  * ----------------
@@ -87,8 +86,7 @@ typedef enum
 typedef struct ParallelBitmapHeapState
 {
 	dsa_pointer tbmiterator;
-	slock_t		mutex;
-	SharedBitmapState state;
+	pg_atomic_uint32 state;
 	ConditionVariable cv;
 } ParallelBitmapHeapState;
 
@@ -228,9 +226,7 @@ BitmapHeapNext(BitmapHeapScanState *node)
 static inline void
 BitmapDoneInitializingSharedState(ParallelBitmapHeapState *pstate)
 {
-	SpinLockAcquire(&pstate->mutex);
-	pstate->state = BM_FINISHED;
-	SpinLockRelease(&pstate->mutex);
+	pg_atomic_write_membarrier_u32(&pstate->state, BM_FINISHED);
 	ConditionVariableBroadcast(&pstate->cv);
 }
 
@@ -480,11 +476,8 @@ BitmapShouldInitializeSharedState(ParallelBitmapHeapState *pstate)
 
 	while (1)
 	{
-		SpinLockAcquire(&pstate->mutex);
-		state = pstate->state;
-		if (pstate->state == BM_INITIAL)
-			pstate->state = BM_INPROGRESS;
-		SpinLockRelease(&pstate->mutex);
+		state = BM_INITIAL;
+		pg_atomic_compare_exchange_u32(&pstate->state, &state, BM_INPROGRESS);
 
 		/* Exit if bitmap is done, or if we're the leader. */
 		if (state != BM_INPROGRESS)
@@ -538,9 +531,7 @@ ExecBitmapHeapInitializeDSM(BitmapHeapScanState *node,
 
 	pstate->tbmiterator = 0;
 
-	/* Initialize the mutex */
-	SpinLockInit(&pstate->mutex);
-	pstate->state = BM_INITIAL;
+	pg_atomic_init_u32(&pstate->state, BM_INITIAL);
 
 	ConditionVariableInit(&pstate->cv);
 
@@ -565,7 +556,7 @@ ExecBitmapHeapReInitializeDSM(BitmapHeapScanState *node,
 	if (dsa == NULL)
 		return;
 
-	pstate->state = BM_INITIAL;
+	pg_atomic_write_u32(&pstate->state, BM_INITIAL);
 
 	if (DsaPointerIsValid(pstate->tbmiterator))
 		tbm_free_shared_area(dsa, pstate->tbmiterator);
-- 
2.50.1 (Apple Git-155)


--Ot5x3ffkWEuxilWO
Content-Type: text/plain; charset=us-ascii
Content-Disposition: attachment;
	filename=v1-0003-convert-FixedParallelState-last_xlog_end-to-an-at.patch



^ permalink  raw  reply  [nested|flat] 440+ messages in thread

* [PATCH v1 2/8] convert ParallelBitmapHeapState->state to an atomic
@ 2026-07-09 18:38 Nathan Bossart <nathan@postgresql.org>
  0 siblings, 0 replies; 440+ messages in thread

From: Nathan Bossart @ 2026-07-09 18:38 UTC (permalink / raw)

---
 src/backend/executor/nodeBitmapHeapscan.c | 21 ++++++---------------
 1 file changed, 6 insertions(+), 15 deletions(-)

diff --git a/src/backend/executor/nodeBitmapHeapscan.c b/src/backend/executor/nodeBitmapHeapscan.c
index 83d6478bc2b..f2bb487bf10 100644
--- a/src/backend/executor/nodeBitmapHeapscan.c
+++ b/src/backend/executor/nodeBitmapHeapscan.c
@@ -79,7 +79,6 @@ typedef enum
 /* ----------------
  *	 ParallelBitmapHeapState information
  *		tbmiterator				iterator for scanning current pages
- *		mutex					mutual exclusion for state
  *		state					current state of the TIDBitmap
  *		cv						conditional wait variable
  * ----------------
@@ -87,8 +86,7 @@ typedef enum
 typedef struct ParallelBitmapHeapState
 {
 	dsa_pointer tbmiterator;
-	slock_t		mutex;
-	SharedBitmapState state;
+	pg_atomic_uint32 state;
 	ConditionVariable cv;
 } ParallelBitmapHeapState;
 
@@ -228,9 +226,7 @@ BitmapHeapNext(BitmapHeapScanState *node)
 static inline void
 BitmapDoneInitializingSharedState(ParallelBitmapHeapState *pstate)
 {
-	SpinLockAcquire(&pstate->mutex);
-	pstate->state = BM_FINISHED;
-	SpinLockRelease(&pstate->mutex);
+	pg_atomic_write_membarrier_u32(&pstate->state, BM_FINISHED);
 	ConditionVariableBroadcast(&pstate->cv);
 }
 
@@ -480,11 +476,8 @@ BitmapShouldInitializeSharedState(ParallelBitmapHeapState *pstate)
 
 	while (1)
 	{
-		SpinLockAcquire(&pstate->mutex);
-		state = pstate->state;
-		if (pstate->state == BM_INITIAL)
-			pstate->state = BM_INPROGRESS;
-		SpinLockRelease(&pstate->mutex);
+		state = BM_INITIAL;
+		pg_atomic_compare_exchange_u32(&pstate->state, &state, BM_INPROGRESS);
 
 		/* Exit if bitmap is done, or if we're the leader. */
 		if (state != BM_INPROGRESS)
@@ -538,9 +531,7 @@ ExecBitmapHeapInitializeDSM(BitmapHeapScanState *node,
 
 	pstate->tbmiterator = 0;
 
-	/* Initialize the mutex */
-	SpinLockInit(&pstate->mutex);
-	pstate->state = BM_INITIAL;
+	pg_atomic_init_u32(&pstate->state, BM_INITIAL);
 
 	ConditionVariableInit(&pstate->cv);
 
@@ -565,7 +556,7 @@ ExecBitmapHeapReInitializeDSM(BitmapHeapScanState *node,
 	if (dsa == NULL)
 		return;
 
-	pstate->state = BM_INITIAL;
+	pg_atomic_write_u32(&pstate->state, BM_INITIAL);
 
 	if (DsaPointerIsValid(pstate->tbmiterator))
 		tbm_free_shared_area(dsa, pstate->tbmiterator);
-- 
2.50.1 (Apple Git-155)


--Ot5x3ffkWEuxilWO
Content-Type: text/plain; charset=us-ascii
Content-Disposition: attachment;
	filename=v1-0003-convert-FixedParallelState-last_xlog_end-to-an-at.patch



^ permalink  raw  reply  [nested|flat] 440+ messages in thread

* [PATCH v1 2/8] convert ParallelBitmapHeapState->state to an atomic
@ 2026-07-09 18:38 Nathan Bossart <nathan@postgresql.org>
  0 siblings, 0 replies; 440+ messages in thread

From: Nathan Bossart @ 2026-07-09 18:38 UTC (permalink / raw)

---
 src/backend/executor/nodeBitmapHeapscan.c | 21 ++++++---------------
 1 file changed, 6 insertions(+), 15 deletions(-)

diff --git a/src/backend/executor/nodeBitmapHeapscan.c b/src/backend/executor/nodeBitmapHeapscan.c
index 83d6478bc2b..f2bb487bf10 100644
--- a/src/backend/executor/nodeBitmapHeapscan.c
+++ b/src/backend/executor/nodeBitmapHeapscan.c
@@ -79,7 +79,6 @@ typedef enum
 /* ----------------
  *	 ParallelBitmapHeapState information
  *		tbmiterator				iterator for scanning current pages
- *		mutex					mutual exclusion for state
  *		state					current state of the TIDBitmap
  *		cv						conditional wait variable
  * ----------------
@@ -87,8 +86,7 @@ typedef enum
 typedef struct ParallelBitmapHeapState
 {
 	dsa_pointer tbmiterator;
-	slock_t		mutex;
-	SharedBitmapState state;
+	pg_atomic_uint32 state;
 	ConditionVariable cv;
 } ParallelBitmapHeapState;
 
@@ -228,9 +226,7 @@ BitmapHeapNext(BitmapHeapScanState *node)
 static inline void
 BitmapDoneInitializingSharedState(ParallelBitmapHeapState *pstate)
 {
-	SpinLockAcquire(&pstate->mutex);
-	pstate->state = BM_FINISHED;
-	SpinLockRelease(&pstate->mutex);
+	pg_atomic_write_membarrier_u32(&pstate->state, BM_FINISHED);
 	ConditionVariableBroadcast(&pstate->cv);
 }
 
@@ -480,11 +476,8 @@ BitmapShouldInitializeSharedState(ParallelBitmapHeapState *pstate)
 
 	while (1)
 	{
-		SpinLockAcquire(&pstate->mutex);
-		state = pstate->state;
-		if (pstate->state == BM_INITIAL)
-			pstate->state = BM_INPROGRESS;
-		SpinLockRelease(&pstate->mutex);
+		state = BM_INITIAL;
+		pg_atomic_compare_exchange_u32(&pstate->state, &state, BM_INPROGRESS);
 
 		/* Exit if bitmap is done, or if we're the leader. */
 		if (state != BM_INPROGRESS)
@@ -538,9 +531,7 @@ ExecBitmapHeapInitializeDSM(BitmapHeapScanState *node,
 
 	pstate->tbmiterator = 0;
 
-	/* Initialize the mutex */
-	SpinLockInit(&pstate->mutex);
-	pstate->state = BM_INITIAL;
+	pg_atomic_init_u32(&pstate->state, BM_INITIAL);
 
 	ConditionVariableInit(&pstate->cv);
 
@@ -565,7 +556,7 @@ ExecBitmapHeapReInitializeDSM(BitmapHeapScanState *node,
 	if (dsa == NULL)
 		return;
 
-	pstate->state = BM_INITIAL;
+	pg_atomic_write_u32(&pstate->state, BM_INITIAL);
 
 	if (DsaPointerIsValid(pstate->tbmiterator))
 		tbm_free_shared_area(dsa, pstate->tbmiterator);
-- 
2.50.1 (Apple Git-155)


--Ot5x3ffkWEuxilWO
Content-Type: text/plain; charset=us-ascii
Content-Disposition: attachment;
	filename=v1-0003-convert-FixedParallelState-last_xlog_end-to-an-at.patch



^ permalink  raw  reply  [nested|flat] 440+ messages in thread

* [PATCH v1 2/8] convert ParallelBitmapHeapState->state to an atomic
@ 2026-07-09 18:38 Nathan Bossart <nathan@postgresql.org>
  0 siblings, 0 replies; 440+ messages in thread

From: Nathan Bossart @ 2026-07-09 18:38 UTC (permalink / raw)

---
 src/backend/executor/nodeBitmapHeapscan.c | 21 ++++++---------------
 1 file changed, 6 insertions(+), 15 deletions(-)

diff --git a/src/backend/executor/nodeBitmapHeapscan.c b/src/backend/executor/nodeBitmapHeapscan.c
index 83d6478bc2b..f2bb487bf10 100644
--- a/src/backend/executor/nodeBitmapHeapscan.c
+++ b/src/backend/executor/nodeBitmapHeapscan.c
@@ -79,7 +79,6 @@ typedef enum
 /* ----------------
  *	 ParallelBitmapHeapState information
  *		tbmiterator				iterator for scanning current pages
- *		mutex					mutual exclusion for state
  *		state					current state of the TIDBitmap
  *		cv						conditional wait variable
  * ----------------
@@ -87,8 +86,7 @@ typedef enum
 typedef struct ParallelBitmapHeapState
 {
 	dsa_pointer tbmiterator;
-	slock_t		mutex;
-	SharedBitmapState state;
+	pg_atomic_uint32 state;
 	ConditionVariable cv;
 } ParallelBitmapHeapState;
 
@@ -228,9 +226,7 @@ BitmapHeapNext(BitmapHeapScanState *node)
 static inline void
 BitmapDoneInitializingSharedState(ParallelBitmapHeapState *pstate)
 {
-	SpinLockAcquire(&pstate->mutex);
-	pstate->state = BM_FINISHED;
-	SpinLockRelease(&pstate->mutex);
+	pg_atomic_write_membarrier_u32(&pstate->state, BM_FINISHED);
 	ConditionVariableBroadcast(&pstate->cv);
 }
 
@@ -480,11 +476,8 @@ BitmapShouldInitializeSharedState(ParallelBitmapHeapState *pstate)
 
 	while (1)
 	{
-		SpinLockAcquire(&pstate->mutex);
-		state = pstate->state;
-		if (pstate->state == BM_INITIAL)
-			pstate->state = BM_INPROGRESS;
-		SpinLockRelease(&pstate->mutex);
+		state = BM_INITIAL;
+		pg_atomic_compare_exchange_u32(&pstate->state, &state, BM_INPROGRESS);
 
 		/* Exit if bitmap is done, or if we're the leader. */
 		if (state != BM_INPROGRESS)
@@ -538,9 +531,7 @@ ExecBitmapHeapInitializeDSM(BitmapHeapScanState *node,
 
 	pstate->tbmiterator = 0;
 
-	/* Initialize the mutex */
-	SpinLockInit(&pstate->mutex);
-	pstate->state = BM_INITIAL;
+	pg_atomic_init_u32(&pstate->state, BM_INITIAL);
 
 	ConditionVariableInit(&pstate->cv);
 
@@ -565,7 +556,7 @@ ExecBitmapHeapReInitializeDSM(BitmapHeapScanState *node,
 	if (dsa == NULL)
 		return;
 
-	pstate->state = BM_INITIAL;
+	pg_atomic_write_u32(&pstate->state, BM_INITIAL);
 
 	if (DsaPointerIsValid(pstate->tbmiterator))
 		tbm_free_shared_area(dsa, pstate->tbmiterator);
-- 
2.50.1 (Apple Git-155)


--Ot5x3ffkWEuxilWO
Content-Type: text/plain; charset=us-ascii
Content-Disposition: attachment;
	filename=v1-0003-convert-FixedParallelState-last_xlog_end-to-an-at.patch



^ permalink  raw  reply  [nested|flat] 440+ messages in thread

* [PATCH v1 2/8] convert ParallelBitmapHeapState->state to an atomic
@ 2026-07-09 18:38 Nathan Bossart <nathan@postgresql.org>
  0 siblings, 0 replies; 440+ messages in thread

From: Nathan Bossart @ 2026-07-09 18:38 UTC (permalink / raw)

---
 src/backend/executor/nodeBitmapHeapscan.c | 21 ++++++---------------
 1 file changed, 6 insertions(+), 15 deletions(-)

diff --git a/src/backend/executor/nodeBitmapHeapscan.c b/src/backend/executor/nodeBitmapHeapscan.c
index 83d6478bc2b..f2bb487bf10 100644
--- a/src/backend/executor/nodeBitmapHeapscan.c
+++ b/src/backend/executor/nodeBitmapHeapscan.c
@@ -79,7 +79,6 @@ typedef enum
 /* ----------------
  *	 ParallelBitmapHeapState information
  *		tbmiterator				iterator for scanning current pages
- *		mutex					mutual exclusion for state
  *		state					current state of the TIDBitmap
  *		cv						conditional wait variable
  * ----------------
@@ -87,8 +86,7 @@ typedef enum
 typedef struct ParallelBitmapHeapState
 {
 	dsa_pointer tbmiterator;
-	slock_t		mutex;
-	SharedBitmapState state;
+	pg_atomic_uint32 state;
 	ConditionVariable cv;
 } ParallelBitmapHeapState;
 
@@ -228,9 +226,7 @@ BitmapHeapNext(BitmapHeapScanState *node)
 static inline void
 BitmapDoneInitializingSharedState(ParallelBitmapHeapState *pstate)
 {
-	SpinLockAcquire(&pstate->mutex);
-	pstate->state = BM_FINISHED;
-	SpinLockRelease(&pstate->mutex);
+	pg_atomic_write_membarrier_u32(&pstate->state, BM_FINISHED);
 	ConditionVariableBroadcast(&pstate->cv);
 }
 
@@ -480,11 +476,8 @@ BitmapShouldInitializeSharedState(ParallelBitmapHeapState *pstate)
 
 	while (1)
 	{
-		SpinLockAcquire(&pstate->mutex);
-		state = pstate->state;
-		if (pstate->state == BM_INITIAL)
-			pstate->state = BM_INPROGRESS;
-		SpinLockRelease(&pstate->mutex);
+		state = BM_INITIAL;
+		pg_atomic_compare_exchange_u32(&pstate->state, &state, BM_INPROGRESS);
 
 		/* Exit if bitmap is done, or if we're the leader. */
 		if (state != BM_INPROGRESS)
@@ -538,9 +531,7 @@ ExecBitmapHeapInitializeDSM(BitmapHeapScanState *node,
 
 	pstate->tbmiterator = 0;
 
-	/* Initialize the mutex */
-	SpinLockInit(&pstate->mutex);
-	pstate->state = BM_INITIAL;
+	pg_atomic_init_u32(&pstate->state, BM_INITIAL);
 
 	ConditionVariableInit(&pstate->cv);
 
@@ -565,7 +556,7 @@ ExecBitmapHeapReInitializeDSM(BitmapHeapScanState *node,
 	if (dsa == NULL)
 		return;
 
-	pstate->state = BM_INITIAL;
+	pg_atomic_write_u32(&pstate->state, BM_INITIAL);
 
 	if (DsaPointerIsValid(pstate->tbmiterator))
 		tbm_free_shared_area(dsa, pstate->tbmiterator);
-- 
2.50.1 (Apple Git-155)


--Ot5x3ffkWEuxilWO
Content-Type: text/plain; charset=us-ascii
Content-Disposition: attachment;
	filename=v1-0003-convert-FixedParallelState-last_xlog_end-to-an-at.patch



^ permalink  raw  reply  [nested|flat] 440+ messages in thread

* [PATCH v1 2/8] convert ParallelBitmapHeapState->state to an atomic
@ 2026-07-09 18:38 Nathan Bossart <nathan@postgresql.org>
  0 siblings, 0 replies; 440+ messages in thread

From: Nathan Bossart @ 2026-07-09 18:38 UTC (permalink / raw)

---
 src/backend/executor/nodeBitmapHeapscan.c | 21 ++++++---------------
 1 file changed, 6 insertions(+), 15 deletions(-)

diff --git a/src/backend/executor/nodeBitmapHeapscan.c b/src/backend/executor/nodeBitmapHeapscan.c
index 83d6478bc2b..f2bb487bf10 100644
--- a/src/backend/executor/nodeBitmapHeapscan.c
+++ b/src/backend/executor/nodeBitmapHeapscan.c
@@ -79,7 +79,6 @@ typedef enum
 /* ----------------
  *	 ParallelBitmapHeapState information
  *		tbmiterator				iterator for scanning current pages
- *		mutex					mutual exclusion for state
  *		state					current state of the TIDBitmap
  *		cv						conditional wait variable
  * ----------------
@@ -87,8 +86,7 @@ typedef enum
 typedef struct ParallelBitmapHeapState
 {
 	dsa_pointer tbmiterator;
-	slock_t		mutex;
-	SharedBitmapState state;
+	pg_atomic_uint32 state;
 	ConditionVariable cv;
 } ParallelBitmapHeapState;
 
@@ -228,9 +226,7 @@ BitmapHeapNext(BitmapHeapScanState *node)
 static inline void
 BitmapDoneInitializingSharedState(ParallelBitmapHeapState *pstate)
 {
-	SpinLockAcquire(&pstate->mutex);
-	pstate->state = BM_FINISHED;
-	SpinLockRelease(&pstate->mutex);
+	pg_atomic_write_membarrier_u32(&pstate->state, BM_FINISHED);
 	ConditionVariableBroadcast(&pstate->cv);
 }
 
@@ -480,11 +476,8 @@ BitmapShouldInitializeSharedState(ParallelBitmapHeapState *pstate)
 
 	while (1)
 	{
-		SpinLockAcquire(&pstate->mutex);
-		state = pstate->state;
-		if (pstate->state == BM_INITIAL)
-			pstate->state = BM_INPROGRESS;
-		SpinLockRelease(&pstate->mutex);
+		state = BM_INITIAL;
+		pg_atomic_compare_exchange_u32(&pstate->state, &state, BM_INPROGRESS);
 
 		/* Exit if bitmap is done, or if we're the leader. */
 		if (state != BM_INPROGRESS)
@@ -538,9 +531,7 @@ ExecBitmapHeapInitializeDSM(BitmapHeapScanState *node,
 
 	pstate->tbmiterator = 0;
 
-	/* Initialize the mutex */
-	SpinLockInit(&pstate->mutex);
-	pstate->state = BM_INITIAL;
+	pg_atomic_init_u32(&pstate->state, BM_INITIAL);
 
 	ConditionVariableInit(&pstate->cv);
 
@@ -565,7 +556,7 @@ ExecBitmapHeapReInitializeDSM(BitmapHeapScanState *node,
 	if (dsa == NULL)
 		return;
 
-	pstate->state = BM_INITIAL;
+	pg_atomic_write_u32(&pstate->state, BM_INITIAL);
 
 	if (DsaPointerIsValid(pstate->tbmiterator))
 		tbm_free_shared_area(dsa, pstate->tbmiterator);
-- 
2.50.1 (Apple Git-155)


--Ot5x3ffkWEuxilWO
Content-Type: text/plain; charset=us-ascii
Content-Disposition: attachment;
	filename=v1-0003-convert-FixedParallelState-last_xlog_end-to-an-at.patch



^ permalink  raw  reply  [nested|flat] 440+ messages in thread

* [PATCH v2 2/9] convert ParallelBitmapHeapState->state to an atomic
@ 2026-07-09 18:38 Nathan Bossart <nathan@postgresql.org>
  0 siblings, 0 replies; 440+ messages in thread

From: Nathan Bossart @ 2026-07-09 18:38 UTC (permalink / raw)

---
 src/backend/executor/nodeBitmapHeapscan.c | 23 +++++++----------------
 1 file changed, 7 insertions(+), 16 deletions(-)

diff --git a/src/backend/executor/nodeBitmapHeapscan.c b/src/backend/executor/nodeBitmapHeapscan.c
index 83d6478bc2b..a9e83f30687 100644
--- a/src/backend/executor/nodeBitmapHeapscan.c
+++ b/src/backend/executor/nodeBitmapHeapscan.c
@@ -79,7 +79,6 @@ typedef enum
 /* ----------------
  *	 ParallelBitmapHeapState information
  *		tbmiterator				iterator for scanning current pages
- *		mutex					mutual exclusion for state
  *		state					current state of the TIDBitmap
  *		cv						conditional wait variable
  * ----------------
@@ -87,8 +86,7 @@ typedef enum
 typedef struct ParallelBitmapHeapState
 {
 	dsa_pointer tbmiterator;
-	slock_t		mutex;
-	SharedBitmapState state;
+	pg_atomic_uint32 state;
 	ConditionVariable cv;
 } ParallelBitmapHeapState;
 
@@ -228,9 +226,7 @@ BitmapHeapNext(BitmapHeapScanState *node)
 static inline void
 BitmapDoneInitializingSharedState(ParallelBitmapHeapState *pstate)
 {
-	SpinLockAcquire(&pstate->mutex);
-	pstate->state = BM_FINISHED;
-	SpinLockRelease(&pstate->mutex);
+	pg_atomic_write_membarrier_u32(&pstate->state, BM_FINISHED);
 	ConditionVariableBroadcast(&pstate->cv);
 }
 
@@ -476,15 +472,12 @@ ExecInitBitmapHeapScan(BitmapHeapScan *node, EState *estate, int eflags)
 static bool
 BitmapShouldInitializeSharedState(ParallelBitmapHeapState *pstate)
 {
-	SharedBitmapState state;
+	uint32		state;
 
 	while (1)
 	{
-		SpinLockAcquire(&pstate->mutex);
-		state = pstate->state;
-		if (pstate->state == BM_INITIAL)
-			pstate->state = BM_INPROGRESS;
-		SpinLockRelease(&pstate->mutex);
+		state = BM_INITIAL;
+		pg_atomic_compare_exchange_u32(&pstate->state, &state, BM_INPROGRESS);
 
 		/* Exit if bitmap is done, or if we're the leader. */
 		if (state != BM_INPROGRESS)
@@ -538,9 +531,7 @@ ExecBitmapHeapInitializeDSM(BitmapHeapScanState *node,
 
 	pstate->tbmiterator = 0;
 
-	/* Initialize the mutex */
-	SpinLockInit(&pstate->mutex);
-	pstate->state = BM_INITIAL;
+	pg_atomic_init_u32(&pstate->state, BM_INITIAL);
 
 	ConditionVariableInit(&pstate->cv);
 
@@ -565,7 +556,7 @@ ExecBitmapHeapReInitializeDSM(BitmapHeapScanState *node,
 	if (dsa == NULL)
 		return;
 
-	pstate->state = BM_INITIAL;
+	pg_atomic_write_u32(&pstate->state, BM_INITIAL);
 
 	if (DsaPointerIsValid(pstate->tbmiterator))
 		tbm_free_shared_area(dsa, pstate->tbmiterator);
-- 
2.50.1 (Apple Git-155)


--Xf36GNcW+0xZNily
Content-Type: text/plain; charset=us-ascii
Content-Disposition: attachment;
	filename=v2-0003-convert-FixedParallelState-last_xlog_end-to-an-at.patch



^ permalink  raw  reply  [nested|flat] 440+ messages in thread

* [PATCH v1 2/8] convert ParallelBitmapHeapState->state to an atomic
@ 2026-07-09 18:38 Nathan Bossart <nathan@postgresql.org>
  0 siblings, 0 replies; 440+ messages in thread

From: Nathan Bossart @ 2026-07-09 18:38 UTC (permalink / raw)

---
 src/backend/executor/nodeBitmapHeapscan.c | 21 ++++++---------------
 1 file changed, 6 insertions(+), 15 deletions(-)

diff --git a/src/backend/executor/nodeBitmapHeapscan.c b/src/backend/executor/nodeBitmapHeapscan.c
index 83d6478bc2b..f2bb487bf10 100644
--- a/src/backend/executor/nodeBitmapHeapscan.c
+++ b/src/backend/executor/nodeBitmapHeapscan.c
@@ -79,7 +79,6 @@ typedef enum
 /* ----------------
  *	 ParallelBitmapHeapState information
  *		tbmiterator				iterator for scanning current pages
- *		mutex					mutual exclusion for state
  *		state					current state of the TIDBitmap
  *		cv						conditional wait variable
  * ----------------
@@ -87,8 +86,7 @@ typedef enum
 typedef struct ParallelBitmapHeapState
 {
 	dsa_pointer tbmiterator;
-	slock_t		mutex;
-	SharedBitmapState state;
+	pg_atomic_uint32 state;
 	ConditionVariable cv;
 } ParallelBitmapHeapState;
 
@@ -228,9 +226,7 @@ BitmapHeapNext(BitmapHeapScanState *node)
 static inline void
 BitmapDoneInitializingSharedState(ParallelBitmapHeapState *pstate)
 {
-	SpinLockAcquire(&pstate->mutex);
-	pstate->state = BM_FINISHED;
-	SpinLockRelease(&pstate->mutex);
+	pg_atomic_write_membarrier_u32(&pstate->state, BM_FINISHED);
 	ConditionVariableBroadcast(&pstate->cv);
 }
 
@@ -480,11 +476,8 @@ BitmapShouldInitializeSharedState(ParallelBitmapHeapState *pstate)
 
 	while (1)
 	{
-		SpinLockAcquire(&pstate->mutex);
-		state = pstate->state;
-		if (pstate->state == BM_INITIAL)
-			pstate->state = BM_INPROGRESS;
-		SpinLockRelease(&pstate->mutex);
+		state = BM_INITIAL;
+		pg_atomic_compare_exchange_u32(&pstate->state, &state, BM_INPROGRESS);
 
 		/* Exit if bitmap is done, or if we're the leader. */
 		if (state != BM_INPROGRESS)
@@ -538,9 +531,7 @@ ExecBitmapHeapInitializeDSM(BitmapHeapScanState *node,
 
 	pstate->tbmiterator = 0;
 
-	/* Initialize the mutex */
-	SpinLockInit(&pstate->mutex);
-	pstate->state = BM_INITIAL;
+	pg_atomic_init_u32(&pstate->state, BM_INITIAL);
 
 	ConditionVariableInit(&pstate->cv);
 
@@ -565,7 +556,7 @@ ExecBitmapHeapReInitializeDSM(BitmapHeapScanState *node,
 	if (dsa == NULL)
 		return;
 
-	pstate->state = BM_INITIAL;
+	pg_atomic_write_u32(&pstate->state, BM_INITIAL);
 
 	if (DsaPointerIsValid(pstate->tbmiterator))
 		tbm_free_shared_area(dsa, pstate->tbmiterator);
-- 
2.50.1 (Apple Git-155)


--Ot5x3ffkWEuxilWO
Content-Type: text/plain; charset=us-ascii
Content-Disposition: attachment;
	filename=v1-0003-convert-FixedParallelState-last_xlog_end-to-an-at.patch



^ permalink  raw  reply  [nested|flat] 440+ messages in thread

* [PATCH v2 2/9] convert ParallelBitmapHeapState->state to an atomic
@ 2026-07-09 18:38 Nathan Bossart <nathan@postgresql.org>
  0 siblings, 0 replies; 440+ messages in thread

From: Nathan Bossart @ 2026-07-09 18:38 UTC (permalink / raw)

---
 src/backend/executor/nodeBitmapHeapscan.c | 23 +++++++----------------
 1 file changed, 7 insertions(+), 16 deletions(-)

diff --git a/src/backend/executor/nodeBitmapHeapscan.c b/src/backend/executor/nodeBitmapHeapscan.c
index 83d6478bc2b..a9e83f30687 100644
--- a/src/backend/executor/nodeBitmapHeapscan.c
+++ b/src/backend/executor/nodeBitmapHeapscan.c
@@ -79,7 +79,6 @@ typedef enum
 /* ----------------
  *	 ParallelBitmapHeapState information
  *		tbmiterator				iterator for scanning current pages
- *		mutex					mutual exclusion for state
  *		state					current state of the TIDBitmap
  *		cv						conditional wait variable
  * ----------------
@@ -87,8 +86,7 @@ typedef enum
 typedef struct ParallelBitmapHeapState
 {
 	dsa_pointer tbmiterator;
-	slock_t		mutex;
-	SharedBitmapState state;
+	pg_atomic_uint32 state;
 	ConditionVariable cv;
 } ParallelBitmapHeapState;
 
@@ -228,9 +226,7 @@ BitmapHeapNext(BitmapHeapScanState *node)
 static inline void
 BitmapDoneInitializingSharedState(ParallelBitmapHeapState *pstate)
 {
-	SpinLockAcquire(&pstate->mutex);
-	pstate->state = BM_FINISHED;
-	SpinLockRelease(&pstate->mutex);
+	pg_atomic_write_membarrier_u32(&pstate->state, BM_FINISHED);
 	ConditionVariableBroadcast(&pstate->cv);
 }
 
@@ -476,15 +472,12 @@ ExecInitBitmapHeapScan(BitmapHeapScan *node, EState *estate, int eflags)
 static bool
 BitmapShouldInitializeSharedState(ParallelBitmapHeapState *pstate)
 {
-	SharedBitmapState state;
+	uint32		state;
 
 	while (1)
 	{
-		SpinLockAcquire(&pstate->mutex);
-		state = pstate->state;
-		if (pstate->state == BM_INITIAL)
-			pstate->state = BM_INPROGRESS;
-		SpinLockRelease(&pstate->mutex);
+		state = BM_INITIAL;
+		pg_atomic_compare_exchange_u32(&pstate->state, &state, BM_INPROGRESS);
 
 		/* Exit if bitmap is done, or if we're the leader. */
 		if (state != BM_INPROGRESS)
@@ -538,9 +531,7 @@ ExecBitmapHeapInitializeDSM(BitmapHeapScanState *node,
 
 	pstate->tbmiterator = 0;
 
-	/* Initialize the mutex */
-	SpinLockInit(&pstate->mutex);
-	pstate->state = BM_INITIAL;
+	pg_atomic_init_u32(&pstate->state, BM_INITIAL);
 
 	ConditionVariableInit(&pstate->cv);
 
@@ -565,7 +556,7 @@ ExecBitmapHeapReInitializeDSM(BitmapHeapScanState *node,
 	if (dsa == NULL)
 		return;
 
-	pstate->state = BM_INITIAL;
+	pg_atomic_write_u32(&pstate->state, BM_INITIAL);
 
 	if (DsaPointerIsValid(pstate->tbmiterator))
 		tbm_free_shared_area(dsa, pstate->tbmiterator);
-- 
2.50.1 (Apple Git-155)


--Xf36GNcW+0xZNily
Content-Type: text/plain; charset=us-ascii
Content-Disposition: attachment;
	filename=v2-0003-convert-FixedParallelState-last_xlog_end-to-an-at.patch



^ permalink  raw  reply  [nested|flat] 440+ messages in thread

* [PATCH v2 2/9] convert ParallelBitmapHeapState->state to an atomic
@ 2026-07-09 18:38 Nathan Bossart <nathan@postgresql.org>
  0 siblings, 0 replies; 440+ messages in thread

From: Nathan Bossart @ 2026-07-09 18:38 UTC (permalink / raw)

---
 src/backend/executor/nodeBitmapHeapscan.c | 23 +++++++----------------
 1 file changed, 7 insertions(+), 16 deletions(-)

diff --git a/src/backend/executor/nodeBitmapHeapscan.c b/src/backend/executor/nodeBitmapHeapscan.c
index 83d6478bc2b..a9e83f30687 100644
--- a/src/backend/executor/nodeBitmapHeapscan.c
+++ b/src/backend/executor/nodeBitmapHeapscan.c
@@ -79,7 +79,6 @@ typedef enum
 /* ----------------
  *	 ParallelBitmapHeapState information
  *		tbmiterator				iterator for scanning current pages
- *		mutex					mutual exclusion for state
  *		state					current state of the TIDBitmap
  *		cv						conditional wait variable
  * ----------------
@@ -87,8 +86,7 @@ typedef enum
 typedef struct ParallelBitmapHeapState
 {
 	dsa_pointer tbmiterator;
-	slock_t		mutex;
-	SharedBitmapState state;
+	pg_atomic_uint32 state;
 	ConditionVariable cv;
 } ParallelBitmapHeapState;
 
@@ -228,9 +226,7 @@ BitmapHeapNext(BitmapHeapScanState *node)
 static inline void
 BitmapDoneInitializingSharedState(ParallelBitmapHeapState *pstate)
 {
-	SpinLockAcquire(&pstate->mutex);
-	pstate->state = BM_FINISHED;
-	SpinLockRelease(&pstate->mutex);
+	pg_atomic_write_membarrier_u32(&pstate->state, BM_FINISHED);
 	ConditionVariableBroadcast(&pstate->cv);
 }
 
@@ -476,15 +472,12 @@ ExecInitBitmapHeapScan(BitmapHeapScan *node, EState *estate, int eflags)
 static bool
 BitmapShouldInitializeSharedState(ParallelBitmapHeapState *pstate)
 {
-	SharedBitmapState state;
+	uint32		state;
 
 	while (1)
 	{
-		SpinLockAcquire(&pstate->mutex);
-		state = pstate->state;
-		if (pstate->state == BM_INITIAL)
-			pstate->state = BM_INPROGRESS;
-		SpinLockRelease(&pstate->mutex);
+		state = BM_INITIAL;
+		pg_atomic_compare_exchange_u32(&pstate->state, &state, BM_INPROGRESS);
 
 		/* Exit if bitmap is done, or if we're the leader. */
 		if (state != BM_INPROGRESS)
@@ -538,9 +531,7 @@ ExecBitmapHeapInitializeDSM(BitmapHeapScanState *node,
 
 	pstate->tbmiterator = 0;
 
-	/* Initialize the mutex */
-	SpinLockInit(&pstate->mutex);
-	pstate->state = BM_INITIAL;
+	pg_atomic_init_u32(&pstate->state, BM_INITIAL);
 
 	ConditionVariableInit(&pstate->cv);
 
@@ -565,7 +556,7 @@ ExecBitmapHeapReInitializeDSM(BitmapHeapScanState *node,
 	if (dsa == NULL)
 		return;
 
-	pstate->state = BM_INITIAL;
+	pg_atomic_write_u32(&pstate->state, BM_INITIAL);
 
 	if (DsaPointerIsValid(pstate->tbmiterator))
 		tbm_free_shared_area(dsa, pstate->tbmiterator);
-- 
2.50.1 (Apple Git-155)


--Xf36GNcW+0xZNily
Content-Type: text/plain; charset=us-ascii
Content-Disposition: attachment;
	filename=v2-0003-convert-FixedParallelState-last_xlog_end-to-an-at.patch



^ permalink  raw  reply  [nested|flat] 440+ messages in thread

* [PATCH v1 2/8] convert ParallelBitmapHeapState->state to an atomic
@ 2026-07-09 18:38 Nathan Bossart <nathan@postgresql.org>
  0 siblings, 0 replies; 440+ messages in thread

From: Nathan Bossart @ 2026-07-09 18:38 UTC (permalink / raw)

---
 src/backend/executor/nodeBitmapHeapscan.c | 21 ++++++---------------
 1 file changed, 6 insertions(+), 15 deletions(-)

diff --git a/src/backend/executor/nodeBitmapHeapscan.c b/src/backend/executor/nodeBitmapHeapscan.c
index 83d6478bc2b..f2bb487bf10 100644
--- a/src/backend/executor/nodeBitmapHeapscan.c
+++ b/src/backend/executor/nodeBitmapHeapscan.c
@@ -79,7 +79,6 @@ typedef enum
 /* ----------------
  *	 ParallelBitmapHeapState information
  *		tbmiterator				iterator for scanning current pages
- *		mutex					mutual exclusion for state
  *		state					current state of the TIDBitmap
  *		cv						conditional wait variable
  * ----------------
@@ -87,8 +86,7 @@ typedef enum
 typedef struct ParallelBitmapHeapState
 {
 	dsa_pointer tbmiterator;
-	slock_t		mutex;
-	SharedBitmapState state;
+	pg_atomic_uint32 state;
 	ConditionVariable cv;
 } ParallelBitmapHeapState;
 
@@ -228,9 +226,7 @@ BitmapHeapNext(BitmapHeapScanState *node)
 static inline void
 BitmapDoneInitializingSharedState(ParallelBitmapHeapState *pstate)
 {
-	SpinLockAcquire(&pstate->mutex);
-	pstate->state = BM_FINISHED;
-	SpinLockRelease(&pstate->mutex);
+	pg_atomic_write_membarrier_u32(&pstate->state, BM_FINISHED);
 	ConditionVariableBroadcast(&pstate->cv);
 }
 
@@ -480,11 +476,8 @@ BitmapShouldInitializeSharedState(ParallelBitmapHeapState *pstate)
 
 	while (1)
 	{
-		SpinLockAcquire(&pstate->mutex);
-		state = pstate->state;
-		if (pstate->state == BM_INITIAL)
-			pstate->state = BM_INPROGRESS;
-		SpinLockRelease(&pstate->mutex);
+		state = BM_INITIAL;
+		pg_atomic_compare_exchange_u32(&pstate->state, &state, BM_INPROGRESS);
 
 		/* Exit if bitmap is done, or if we're the leader. */
 		if (state != BM_INPROGRESS)
@@ -538,9 +531,7 @@ ExecBitmapHeapInitializeDSM(BitmapHeapScanState *node,
 
 	pstate->tbmiterator = 0;
 
-	/* Initialize the mutex */
-	SpinLockInit(&pstate->mutex);
-	pstate->state = BM_INITIAL;
+	pg_atomic_init_u32(&pstate->state, BM_INITIAL);
 
 	ConditionVariableInit(&pstate->cv);
 
@@ -565,7 +556,7 @@ ExecBitmapHeapReInitializeDSM(BitmapHeapScanState *node,
 	if (dsa == NULL)
 		return;
 
-	pstate->state = BM_INITIAL;
+	pg_atomic_write_u32(&pstate->state, BM_INITIAL);
 
 	if (DsaPointerIsValid(pstate->tbmiterator))
 		tbm_free_shared_area(dsa, pstate->tbmiterator);
-- 
2.50.1 (Apple Git-155)


--Ot5x3ffkWEuxilWO
Content-Type: text/plain; charset=us-ascii
Content-Disposition: attachment;
	filename=v1-0003-convert-FixedParallelState-last_xlog_end-to-an-at.patch



^ permalink  raw  reply  [nested|flat] 440+ messages in thread

* [PATCH v1 2/8] convert ParallelBitmapHeapState->state to an atomic
@ 2026-07-09 18:38 Nathan Bossart <nathan@postgresql.org>
  0 siblings, 0 replies; 440+ messages in thread

From: Nathan Bossart @ 2026-07-09 18:38 UTC (permalink / raw)

---
 src/backend/executor/nodeBitmapHeapscan.c | 21 ++++++---------------
 1 file changed, 6 insertions(+), 15 deletions(-)

diff --git a/src/backend/executor/nodeBitmapHeapscan.c b/src/backend/executor/nodeBitmapHeapscan.c
index 83d6478bc2b..f2bb487bf10 100644
--- a/src/backend/executor/nodeBitmapHeapscan.c
+++ b/src/backend/executor/nodeBitmapHeapscan.c
@@ -79,7 +79,6 @@ typedef enum
 /* ----------------
  *	 ParallelBitmapHeapState information
  *		tbmiterator				iterator for scanning current pages
- *		mutex					mutual exclusion for state
  *		state					current state of the TIDBitmap
  *		cv						conditional wait variable
  * ----------------
@@ -87,8 +86,7 @@ typedef enum
 typedef struct ParallelBitmapHeapState
 {
 	dsa_pointer tbmiterator;
-	slock_t		mutex;
-	SharedBitmapState state;
+	pg_atomic_uint32 state;
 	ConditionVariable cv;
 } ParallelBitmapHeapState;
 
@@ -228,9 +226,7 @@ BitmapHeapNext(BitmapHeapScanState *node)
 static inline void
 BitmapDoneInitializingSharedState(ParallelBitmapHeapState *pstate)
 {
-	SpinLockAcquire(&pstate->mutex);
-	pstate->state = BM_FINISHED;
-	SpinLockRelease(&pstate->mutex);
+	pg_atomic_write_membarrier_u32(&pstate->state, BM_FINISHED);
 	ConditionVariableBroadcast(&pstate->cv);
 }
 
@@ -480,11 +476,8 @@ BitmapShouldInitializeSharedState(ParallelBitmapHeapState *pstate)
 
 	while (1)
 	{
-		SpinLockAcquire(&pstate->mutex);
-		state = pstate->state;
-		if (pstate->state == BM_INITIAL)
-			pstate->state = BM_INPROGRESS;
-		SpinLockRelease(&pstate->mutex);
+		state = BM_INITIAL;
+		pg_atomic_compare_exchange_u32(&pstate->state, &state, BM_INPROGRESS);
 
 		/* Exit if bitmap is done, or if we're the leader. */
 		if (state != BM_INPROGRESS)
@@ -538,9 +531,7 @@ ExecBitmapHeapInitializeDSM(BitmapHeapScanState *node,
 
 	pstate->tbmiterator = 0;
 
-	/* Initialize the mutex */
-	SpinLockInit(&pstate->mutex);
-	pstate->state = BM_INITIAL;
+	pg_atomic_init_u32(&pstate->state, BM_INITIAL);
 
 	ConditionVariableInit(&pstate->cv);
 
@@ -565,7 +556,7 @@ ExecBitmapHeapReInitializeDSM(BitmapHeapScanState *node,
 	if (dsa == NULL)
 		return;
 
-	pstate->state = BM_INITIAL;
+	pg_atomic_write_u32(&pstate->state, BM_INITIAL);
 
 	if (DsaPointerIsValid(pstate->tbmiterator))
 		tbm_free_shared_area(dsa, pstate->tbmiterator);
-- 
2.50.1 (Apple Git-155)


--Ot5x3ffkWEuxilWO
Content-Type: text/plain; charset=us-ascii
Content-Disposition: attachment;
	filename=v1-0003-convert-FixedParallelState-last_xlog_end-to-an-at.patch



^ permalink  raw  reply  [nested|flat] 440+ messages in thread

* [PATCH v1 2/8] convert ParallelBitmapHeapState->state to an atomic
@ 2026-07-09 18:38 Nathan Bossart <nathan@postgresql.org>
  0 siblings, 0 replies; 440+ messages in thread

From: Nathan Bossart @ 2026-07-09 18:38 UTC (permalink / raw)

---
 src/backend/executor/nodeBitmapHeapscan.c | 21 ++++++---------------
 1 file changed, 6 insertions(+), 15 deletions(-)

diff --git a/src/backend/executor/nodeBitmapHeapscan.c b/src/backend/executor/nodeBitmapHeapscan.c
index 83d6478bc2b..f2bb487bf10 100644
--- a/src/backend/executor/nodeBitmapHeapscan.c
+++ b/src/backend/executor/nodeBitmapHeapscan.c
@@ -79,7 +79,6 @@ typedef enum
 /* ----------------
  *	 ParallelBitmapHeapState information
  *		tbmiterator				iterator for scanning current pages
- *		mutex					mutual exclusion for state
  *		state					current state of the TIDBitmap
  *		cv						conditional wait variable
  * ----------------
@@ -87,8 +86,7 @@ typedef enum
 typedef struct ParallelBitmapHeapState
 {
 	dsa_pointer tbmiterator;
-	slock_t		mutex;
-	SharedBitmapState state;
+	pg_atomic_uint32 state;
 	ConditionVariable cv;
 } ParallelBitmapHeapState;
 
@@ -228,9 +226,7 @@ BitmapHeapNext(BitmapHeapScanState *node)
 static inline void
 BitmapDoneInitializingSharedState(ParallelBitmapHeapState *pstate)
 {
-	SpinLockAcquire(&pstate->mutex);
-	pstate->state = BM_FINISHED;
-	SpinLockRelease(&pstate->mutex);
+	pg_atomic_write_membarrier_u32(&pstate->state, BM_FINISHED);
 	ConditionVariableBroadcast(&pstate->cv);
 }
 
@@ -480,11 +476,8 @@ BitmapShouldInitializeSharedState(ParallelBitmapHeapState *pstate)
 
 	while (1)
 	{
-		SpinLockAcquire(&pstate->mutex);
-		state = pstate->state;
-		if (pstate->state == BM_INITIAL)
-			pstate->state = BM_INPROGRESS;
-		SpinLockRelease(&pstate->mutex);
+		state = BM_INITIAL;
+		pg_atomic_compare_exchange_u32(&pstate->state, &state, BM_INPROGRESS);
 
 		/* Exit if bitmap is done, or if we're the leader. */
 		if (state != BM_INPROGRESS)
@@ -538,9 +531,7 @@ ExecBitmapHeapInitializeDSM(BitmapHeapScanState *node,
 
 	pstate->tbmiterator = 0;
 
-	/* Initialize the mutex */
-	SpinLockInit(&pstate->mutex);
-	pstate->state = BM_INITIAL;
+	pg_atomic_init_u32(&pstate->state, BM_INITIAL);
 
 	ConditionVariableInit(&pstate->cv);
 
@@ -565,7 +556,7 @@ ExecBitmapHeapReInitializeDSM(BitmapHeapScanState *node,
 	if (dsa == NULL)
 		return;
 
-	pstate->state = BM_INITIAL;
+	pg_atomic_write_u32(&pstate->state, BM_INITIAL);
 
 	if (DsaPointerIsValid(pstate->tbmiterator))
 		tbm_free_shared_area(dsa, pstate->tbmiterator);
-- 
2.50.1 (Apple Git-155)


--Ot5x3ffkWEuxilWO
Content-Type: text/plain; charset=us-ascii
Content-Disposition: attachment;
	filename=v1-0003-convert-FixedParallelState-last_xlog_end-to-an-at.patch



^ permalink  raw  reply  [nested|flat] 440+ messages in thread

* [PATCH v2 2/9] convert ParallelBitmapHeapState->state to an atomic
@ 2026-07-09 18:38 Nathan Bossart <nathan@postgresql.org>
  0 siblings, 0 replies; 440+ messages in thread

From: Nathan Bossart @ 2026-07-09 18:38 UTC (permalink / raw)

---
 src/backend/executor/nodeBitmapHeapscan.c | 23 +++++++----------------
 1 file changed, 7 insertions(+), 16 deletions(-)

diff --git a/src/backend/executor/nodeBitmapHeapscan.c b/src/backend/executor/nodeBitmapHeapscan.c
index 83d6478bc2b..a9e83f30687 100644
--- a/src/backend/executor/nodeBitmapHeapscan.c
+++ b/src/backend/executor/nodeBitmapHeapscan.c
@@ -79,7 +79,6 @@ typedef enum
 /* ----------------
  *	 ParallelBitmapHeapState information
  *		tbmiterator				iterator for scanning current pages
- *		mutex					mutual exclusion for state
  *		state					current state of the TIDBitmap
  *		cv						conditional wait variable
  * ----------------
@@ -87,8 +86,7 @@ typedef enum
 typedef struct ParallelBitmapHeapState
 {
 	dsa_pointer tbmiterator;
-	slock_t		mutex;
-	SharedBitmapState state;
+	pg_atomic_uint32 state;
 	ConditionVariable cv;
 } ParallelBitmapHeapState;
 
@@ -228,9 +226,7 @@ BitmapHeapNext(BitmapHeapScanState *node)
 static inline void
 BitmapDoneInitializingSharedState(ParallelBitmapHeapState *pstate)
 {
-	SpinLockAcquire(&pstate->mutex);
-	pstate->state = BM_FINISHED;
-	SpinLockRelease(&pstate->mutex);
+	pg_atomic_write_membarrier_u32(&pstate->state, BM_FINISHED);
 	ConditionVariableBroadcast(&pstate->cv);
 }
 
@@ -476,15 +472,12 @@ ExecInitBitmapHeapScan(BitmapHeapScan *node, EState *estate, int eflags)
 static bool
 BitmapShouldInitializeSharedState(ParallelBitmapHeapState *pstate)
 {
-	SharedBitmapState state;
+	uint32		state;
 
 	while (1)
 	{
-		SpinLockAcquire(&pstate->mutex);
-		state = pstate->state;
-		if (pstate->state == BM_INITIAL)
-			pstate->state = BM_INPROGRESS;
-		SpinLockRelease(&pstate->mutex);
+		state = BM_INITIAL;
+		pg_atomic_compare_exchange_u32(&pstate->state, &state, BM_INPROGRESS);
 
 		/* Exit if bitmap is done, or if we're the leader. */
 		if (state != BM_INPROGRESS)
@@ -538,9 +531,7 @@ ExecBitmapHeapInitializeDSM(BitmapHeapScanState *node,
 
 	pstate->tbmiterator = 0;
 
-	/* Initialize the mutex */
-	SpinLockInit(&pstate->mutex);
-	pstate->state = BM_INITIAL;
+	pg_atomic_init_u32(&pstate->state, BM_INITIAL);
 
 	ConditionVariableInit(&pstate->cv);
 
@@ -565,7 +556,7 @@ ExecBitmapHeapReInitializeDSM(BitmapHeapScanState *node,
 	if (dsa == NULL)
 		return;
 
-	pstate->state = BM_INITIAL;
+	pg_atomic_write_u32(&pstate->state, BM_INITIAL);
 
 	if (DsaPointerIsValid(pstate->tbmiterator))
 		tbm_free_shared_area(dsa, pstate->tbmiterator);
-- 
2.50.1 (Apple Git-155)


--Xf36GNcW+0xZNily
Content-Type: text/plain; charset=us-ascii
Content-Disposition: attachment;
	filename=v2-0003-convert-FixedParallelState-last_xlog_end-to-an-at.patch



^ permalink  raw  reply  [nested|flat] 440+ messages in thread

* [PATCH v1 2/8] convert ParallelBitmapHeapState->state to an atomic
@ 2026-07-09 18:38 Nathan Bossart <nathan@postgresql.org>
  0 siblings, 0 replies; 440+ messages in thread

From: Nathan Bossart @ 2026-07-09 18:38 UTC (permalink / raw)

---
 src/backend/executor/nodeBitmapHeapscan.c | 21 ++++++---------------
 1 file changed, 6 insertions(+), 15 deletions(-)

diff --git a/src/backend/executor/nodeBitmapHeapscan.c b/src/backend/executor/nodeBitmapHeapscan.c
index 83d6478bc2b..f2bb487bf10 100644
--- a/src/backend/executor/nodeBitmapHeapscan.c
+++ b/src/backend/executor/nodeBitmapHeapscan.c
@@ -79,7 +79,6 @@ typedef enum
 /* ----------------
  *	 ParallelBitmapHeapState information
  *		tbmiterator				iterator for scanning current pages
- *		mutex					mutual exclusion for state
  *		state					current state of the TIDBitmap
  *		cv						conditional wait variable
  * ----------------
@@ -87,8 +86,7 @@ typedef enum
 typedef struct ParallelBitmapHeapState
 {
 	dsa_pointer tbmiterator;
-	slock_t		mutex;
-	SharedBitmapState state;
+	pg_atomic_uint32 state;
 	ConditionVariable cv;
 } ParallelBitmapHeapState;
 
@@ -228,9 +226,7 @@ BitmapHeapNext(BitmapHeapScanState *node)
 static inline void
 BitmapDoneInitializingSharedState(ParallelBitmapHeapState *pstate)
 {
-	SpinLockAcquire(&pstate->mutex);
-	pstate->state = BM_FINISHED;
-	SpinLockRelease(&pstate->mutex);
+	pg_atomic_write_membarrier_u32(&pstate->state, BM_FINISHED);
 	ConditionVariableBroadcast(&pstate->cv);
 }
 
@@ -480,11 +476,8 @@ BitmapShouldInitializeSharedState(ParallelBitmapHeapState *pstate)
 
 	while (1)
 	{
-		SpinLockAcquire(&pstate->mutex);
-		state = pstate->state;
-		if (pstate->state == BM_INITIAL)
-			pstate->state = BM_INPROGRESS;
-		SpinLockRelease(&pstate->mutex);
+		state = BM_INITIAL;
+		pg_atomic_compare_exchange_u32(&pstate->state, &state, BM_INPROGRESS);
 
 		/* Exit if bitmap is done, or if we're the leader. */
 		if (state != BM_INPROGRESS)
@@ -538,9 +531,7 @@ ExecBitmapHeapInitializeDSM(BitmapHeapScanState *node,
 
 	pstate->tbmiterator = 0;
 
-	/* Initialize the mutex */
-	SpinLockInit(&pstate->mutex);
-	pstate->state = BM_INITIAL;
+	pg_atomic_init_u32(&pstate->state, BM_INITIAL);
 
 	ConditionVariableInit(&pstate->cv);
 
@@ -565,7 +556,7 @@ ExecBitmapHeapReInitializeDSM(BitmapHeapScanState *node,
 	if (dsa == NULL)
 		return;
 
-	pstate->state = BM_INITIAL;
+	pg_atomic_write_u32(&pstate->state, BM_INITIAL);
 
 	if (DsaPointerIsValid(pstate->tbmiterator))
 		tbm_free_shared_area(dsa, pstate->tbmiterator);
-- 
2.50.1 (Apple Git-155)


--Ot5x3ffkWEuxilWO
Content-Type: text/plain; charset=us-ascii
Content-Disposition: attachment;
	filename=v1-0003-convert-FixedParallelState-last_xlog_end-to-an-at.patch



^ permalink  raw  reply  [nested|flat] 440+ messages in thread

* [PATCH v1 2/8] convert ParallelBitmapHeapState->state to an atomic
@ 2026-07-09 18:38 Nathan Bossart <nathan@postgresql.org>
  0 siblings, 0 replies; 440+ messages in thread

From: Nathan Bossart @ 2026-07-09 18:38 UTC (permalink / raw)

---
 src/backend/executor/nodeBitmapHeapscan.c | 21 ++++++---------------
 1 file changed, 6 insertions(+), 15 deletions(-)

diff --git a/src/backend/executor/nodeBitmapHeapscan.c b/src/backend/executor/nodeBitmapHeapscan.c
index 83d6478bc2b..f2bb487bf10 100644
--- a/src/backend/executor/nodeBitmapHeapscan.c
+++ b/src/backend/executor/nodeBitmapHeapscan.c
@@ -79,7 +79,6 @@ typedef enum
 /* ----------------
  *	 ParallelBitmapHeapState information
  *		tbmiterator				iterator for scanning current pages
- *		mutex					mutual exclusion for state
  *		state					current state of the TIDBitmap
  *		cv						conditional wait variable
  * ----------------
@@ -87,8 +86,7 @@ typedef enum
 typedef struct ParallelBitmapHeapState
 {
 	dsa_pointer tbmiterator;
-	slock_t		mutex;
-	SharedBitmapState state;
+	pg_atomic_uint32 state;
 	ConditionVariable cv;
 } ParallelBitmapHeapState;
 
@@ -228,9 +226,7 @@ BitmapHeapNext(BitmapHeapScanState *node)
 static inline void
 BitmapDoneInitializingSharedState(ParallelBitmapHeapState *pstate)
 {
-	SpinLockAcquire(&pstate->mutex);
-	pstate->state = BM_FINISHED;
-	SpinLockRelease(&pstate->mutex);
+	pg_atomic_write_membarrier_u32(&pstate->state, BM_FINISHED);
 	ConditionVariableBroadcast(&pstate->cv);
 }
 
@@ -480,11 +476,8 @@ BitmapShouldInitializeSharedState(ParallelBitmapHeapState *pstate)
 
 	while (1)
 	{
-		SpinLockAcquire(&pstate->mutex);
-		state = pstate->state;
-		if (pstate->state == BM_INITIAL)
-			pstate->state = BM_INPROGRESS;
-		SpinLockRelease(&pstate->mutex);
+		state = BM_INITIAL;
+		pg_atomic_compare_exchange_u32(&pstate->state, &state, BM_INPROGRESS);
 
 		/* Exit if bitmap is done, or if we're the leader. */
 		if (state != BM_INPROGRESS)
@@ -538,9 +531,7 @@ ExecBitmapHeapInitializeDSM(BitmapHeapScanState *node,
 
 	pstate->tbmiterator = 0;
 
-	/* Initialize the mutex */
-	SpinLockInit(&pstate->mutex);
-	pstate->state = BM_INITIAL;
+	pg_atomic_init_u32(&pstate->state, BM_INITIAL);
 
 	ConditionVariableInit(&pstate->cv);
 
@@ -565,7 +556,7 @@ ExecBitmapHeapReInitializeDSM(BitmapHeapScanState *node,
 	if (dsa == NULL)
 		return;
 
-	pstate->state = BM_INITIAL;
+	pg_atomic_write_u32(&pstate->state, BM_INITIAL);
 
 	if (DsaPointerIsValid(pstate->tbmiterator))
 		tbm_free_shared_area(dsa, pstate->tbmiterator);
-- 
2.50.1 (Apple Git-155)


--Ot5x3ffkWEuxilWO
Content-Type: text/plain; charset=us-ascii
Content-Disposition: attachment;
	filename=v1-0003-convert-FixedParallelState-last_xlog_end-to-an-at.patch



^ permalink  raw  reply  [nested|flat] 440+ messages in thread

* [PATCH v1 2/8] convert ParallelBitmapHeapState->state to an atomic
@ 2026-07-09 18:38 Nathan Bossart <nathan@postgresql.org>
  0 siblings, 0 replies; 440+ messages in thread

From: Nathan Bossart @ 2026-07-09 18:38 UTC (permalink / raw)

---
 src/backend/executor/nodeBitmapHeapscan.c | 21 ++++++---------------
 1 file changed, 6 insertions(+), 15 deletions(-)

diff --git a/src/backend/executor/nodeBitmapHeapscan.c b/src/backend/executor/nodeBitmapHeapscan.c
index 83d6478bc2b..f2bb487bf10 100644
--- a/src/backend/executor/nodeBitmapHeapscan.c
+++ b/src/backend/executor/nodeBitmapHeapscan.c
@@ -79,7 +79,6 @@ typedef enum
 /* ----------------
  *	 ParallelBitmapHeapState information
  *		tbmiterator				iterator for scanning current pages
- *		mutex					mutual exclusion for state
  *		state					current state of the TIDBitmap
  *		cv						conditional wait variable
  * ----------------
@@ -87,8 +86,7 @@ typedef enum
 typedef struct ParallelBitmapHeapState
 {
 	dsa_pointer tbmiterator;
-	slock_t		mutex;
-	SharedBitmapState state;
+	pg_atomic_uint32 state;
 	ConditionVariable cv;
 } ParallelBitmapHeapState;
 
@@ -228,9 +226,7 @@ BitmapHeapNext(BitmapHeapScanState *node)
 static inline void
 BitmapDoneInitializingSharedState(ParallelBitmapHeapState *pstate)
 {
-	SpinLockAcquire(&pstate->mutex);
-	pstate->state = BM_FINISHED;
-	SpinLockRelease(&pstate->mutex);
+	pg_atomic_write_membarrier_u32(&pstate->state, BM_FINISHED);
 	ConditionVariableBroadcast(&pstate->cv);
 }
 
@@ -480,11 +476,8 @@ BitmapShouldInitializeSharedState(ParallelBitmapHeapState *pstate)
 
 	while (1)
 	{
-		SpinLockAcquire(&pstate->mutex);
-		state = pstate->state;
-		if (pstate->state == BM_INITIAL)
-			pstate->state = BM_INPROGRESS;
-		SpinLockRelease(&pstate->mutex);
+		state = BM_INITIAL;
+		pg_atomic_compare_exchange_u32(&pstate->state, &state, BM_INPROGRESS);
 
 		/* Exit if bitmap is done, or if we're the leader. */
 		if (state != BM_INPROGRESS)
@@ -538,9 +531,7 @@ ExecBitmapHeapInitializeDSM(BitmapHeapScanState *node,
 
 	pstate->tbmiterator = 0;
 
-	/* Initialize the mutex */
-	SpinLockInit(&pstate->mutex);
-	pstate->state = BM_INITIAL;
+	pg_atomic_init_u32(&pstate->state, BM_INITIAL);
 
 	ConditionVariableInit(&pstate->cv);
 
@@ -565,7 +556,7 @@ ExecBitmapHeapReInitializeDSM(BitmapHeapScanState *node,
 	if (dsa == NULL)
 		return;
 
-	pstate->state = BM_INITIAL;
+	pg_atomic_write_u32(&pstate->state, BM_INITIAL);
 
 	if (DsaPointerIsValid(pstate->tbmiterator))
 		tbm_free_shared_area(dsa, pstate->tbmiterator);
-- 
2.50.1 (Apple Git-155)


--Ot5x3ffkWEuxilWO
Content-Type: text/plain; charset=us-ascii
Content-Disposition: attachment;
	filename=v1-0003-convert-FixedParallelState-last_xlog_end-to-an-at.patch



^ permalink  raw  reply  [nested|flat] 440+ messages in thread

* [PATCH v1 2/8] convert ParallelBitmapHeapState->state to an atomic
@ 2026-07-09 18:38 Nathan Bossart <nathan@postgresql.org>
  0 siblings, 0 replies; 440+ messages in thread

From: Nathan Bossart @ 2026-07-09 18:38 UTC (permalink / raw)

---
 src/backend/executor/nodeBitmapHeapscan.c | 21 ++++++---------------
 1 file changed, 6 insertions(+), 15 deletions(-)

diff --git a/src/backend/executor/nodeBitmapHeapscan.c b/src/backend/executor/nodeBitmapHeapscan.c
index 83d6478bc2b..f2bb487bf10 100644
--- a/src/backend/executor/nodeBitmapHeapscan.c
+++ b/src/backend/executor/nodeBitmapHeapscan.c
@@ -79,7 +79,6 @@ typedef enum
 /* ----------------
  *	 ParallelBitmapHeapState information
  *		tbmiterator				iterator for scanning current pages
- *		mutex					mutual exclusion for state
  *		state					current state of the TIDBitmap
  *		cv						conditional wait variable
  * ----------------
@@ -87,8 +86,7 @@ typedef enum
 typedef struct ParallelBitmapHeapState
 {
 	dsa_pointer tbmiterator;
-	slock_t		mutex;
-	SharedBitmapState state;
+	pg_atomic_uint32 state;
 	ConditionVariable cv;
 } ParallelBitmapHeapState;
 
@@ -228,9 +226,7 @@ BitmapHeapNext(BitmapHeapScanState *node)
 static inline void
 BitmapDoneInitializingSharedState(ParallelBitmapHeapState *pstate)
 {
-	SpinLockAcquire(&pstate->mutex);
-	pstate->state = BM_FINISHED;
-	SpinLockRelease(&pstate->mutex);
+	pg_atomic_write_membarrier_u32(&pstate->state, BM_FINISHED);
 	ConditionVariableBroadcast(&pstate->cv);
 }
 
@@ -480,11 +476,8 @@ BitmapShouldInitializeSharedState(ParallelBitmapHeapState *pstate)
 
 	while (1)
 	{
-		SpinLockAcquire(&pstate->mutex);
-		state = pstate->state;
-		if (pstate->state == BM_INITIAL)
-			pstate->state = BM_INPROGRESS;
-		SpinLockRelease(&pstate->mutex);
+		state = BM_INITIAL;
+		pg_atomic_compare_exchange_u32(&pstate->state, &state, BM_INPROGRESS);
 
 		/* Exit if bitmap is done, or if we're the leader. */
 		if (state != BM_INPROGRESS)
@@ -538,9 +531,7 @@ ExecBitmapHeapInitializeDSM(BitmapHeapScanState *node,
 
 	pstate->tbmiterator = 0;
 
-	/* Initialize the mutex */
-	SpinLockInit(&pstate->mutex);
-	pstate->state = BM_INITIAL;
+	pg_atomic_init_u32(&pstate->state, BM_INITIAL);
 
 	ConditionVariableInit(&pstate->cv);
 
@@ -565,7 +556,7 @@ ExecBitmapHeapReInitializeDSM(BitmapHeapScanState *node,
 	if (dsa == NULL)
 		return;
 
-	pstate->state = BM_INITIAL;
+	pg_atomic_write_u32(&pstate->state, BM_INITIAL);
 
 	if (DsaPointerIsValid(pstate->tbmiterator))
 		tbm_free_shared_area(dsa, pstate->tbmiterator);
-- 
2.50.1 (Apple Git-155)


--Ot5x3ffkWEuxilWO
Content-Type: text/plain; charset=us-ascii
Content-Disposition: attachment;
	filename=v1-0003-convert-FixedParallelState-last_xlog_end-to-an-at.patch



^ permalink  raw  reply  [nested|flat] 440+ messages in thread

* [PATCH v1 2/8] convert ParallelBitmapHeapState->state to an atomic
@ 2026-07-09 18:38 Nathan Bossart <nathan@postgresql.org>
  0 siblings, 0 replies; 440+ messages in thread

From: Nathan Bossart @ 2026-07-09 18:38 UTC (permalink / raw)

---
 src/backend/executor/nodeBitmapHeapscan.c | 21 ++++++---------------
 1 file changed, 6 insertions(+), 15 deletions(-)

diff --git a/src/backend/executor/nodeBitmapHeapscan.c b/src/backend/executor/nodeBitmapHeapscan.c
index 83d6478bc2b..f2bb487bf10 100644
--- a/src/backend/executor/nodeBitmapHeapscan.c
+++ b/src/backend/executor/nodeBitmapHeapscan.c
@@ -79,7 +79,6 @@ typedef enum
 /* ----------------
  *	 ParallelBitmapHeapState information
  *		tbmiterator				iterator for scanning current pages
- *		mutex					mutual exclusion for state
  *		state					current state of the TIDBitmap
  *		cv						conditional wait variable
  * ----------------
@@ -87,8 +86,7 @@ typedef enum
 typedef struct ParallelBitmapHeapState
 {
 	dsa_pointer tbmiterator;
-	slock_t		mutex;
-	SharedBitmapState state;
+	pg_atomic_uint32 state;
 	ConditionVariable cv;
 } ParallelBitmapHeapState;
 
@@ -228,9 +226,7 @@ BitmapHeapNext(BitmapHeapScanState *node)
 static inline void
 BitmapDoneInitializingSharedState(ParallelBitmapHeapState *pstate)
 {
-	SpinLockAcquire(&pstate->mutex);
-	pstate->state = BM_FINISHED;
-	SpinLockRelease(&pstate->mutex);
+	pg_atomic_write_membarrier_u32(&pstate->state, BM_FINISHED);
 	ConditionVariableBroadcast(&pstate->cv);
 }
 
@@ -480,11 +476,8 @@ BitmapShouldInitializeSharedState(ParallelBitmapHeapState *pstate)
 
 	while (1)
 	{
-		SpinLockAcquire(&pstate->mutex);
-		state = pstate->state;
-		if (pstate->state == BM_INITIAL)
-			pstate->state = BM_INPROGRESS;
-		SpinLockRelease(&pstate->mutex);
+		state = BM_INITIAL;
+		pg_atomic_compare_exchange_u32(&pstate->state, &state, BM_INPROGRESS);
 
 		/* Exit if bitmap is done, or if we're the leader. */
 		if (state != BM_INPROGRESS)
@@ -538,9 +531,7 @@ ExecBitmapHeapInitializeDSM(BitmapHeapScanState *node,
 
 	pstate->tbmiterator = 0;
 
-	/* Initialize the mutex */
-	SpinLockInit(&pstate->mutex);
-	pstate->state = BM_INITIAL;
+	pg_atomic_init_u32(&pstate->state, BM_INITIAL);
 
 	ConditionVariableInit(&pstate->cv);
 
@@ -565,7 +556,7 @@ ExecBitmapHeapReInitializeDSM(BitmapHeapScanState *node,
 	if (dsa == NULL)
 		return;
 
-	pstate->state = BM_INITIAL;
+	pg_atomic_write_u32(&pstate->state, BM_INITIAL);
 
 	if (DsaPointerIsValid(pstate->tbmiterator))
 		tbm_free_shared_area(dsa, pstate->tbmiterator);
-- 
2.50.1 (Apple Git-155)


--Ot5x3ffkWEuxilWO
Content-Type: text/plain; charset=us-ascii
Content-Disposition: attachment;
	filename=v1-0003-convert-FixedParallelState-last_xlog_end-to-an-at.patch



^ permalink  raw  reply  [nested|flat] 440+ messages in thread

* [PATCH v1 2/8] convert ParallelBitmapHeapState->state to an atomic
@ 2026-07-09 18:38 Nathan Bossart <nathan@postgresql.org>
  0 siblings, 0 replies; 440+ messages in thread

From: Nathan Bossart @ 2026-07-09 18:38 UTC (permalink / raw)

---
 src/backend/executor/nodeBitmapHeapscan.c | 21 ++++++---------------
 1 file changed, 6 insertions(+), 15 deletions(-)

diff --git a/src/backend/executor/nodeBitmapHeapscan.c b/src/backend/executor/nodeBitmapHeapscan.c
index 83d6478bc2b..f2bb487bf10 100644
--- a/src/backend/executor/nodeBitmapHeapscan.c
+++ b/src/backend/executor/nodeBitmapHeapscan.c
@@ -79,7 +79,6 @@ typedef enum
 /* ----------------
  *	 ParallelBitmapHeapState information
  *		tbmiterator				iterator for scanning current pages
- *		mutex					mutual exclusion for state
  *		state					current state of the TIDBitmap
  *		cv						conditional wait variable
  * ----------------
@@ -87,8 +86,7 @@ typedef enum
 typedef struct ParallelBitmapHeapState
 {
 	dsa_pointer tbmiterator;
-	slock_t		mutex;
-	SharedBitmapState state;
+	pg_atomic_uint32 state;
 	ConditionVariable cv;
 } ParallelBitmapHeapState;
 
@@ -228,9 +226,7 @@ BitmapHeapNext(BitmapHeapScanState *node)
 static inline void
 BitmapDoneInitializingSharedState(ParallelBitmapHeapState *pstate)
 {
-	SpinLockAcquire(&pstate->mutex);
-	pstate->state = BM_FINISHED;
-	SpinLockRelease(&pstate->mutex);
+	pg_atomic_write_membarrier_u32(&pstate->state, BM_FINISHED);
 	ConditionVariableBroadcast(&pstate->cv);
 }
 
@@ -480,11 +476,8 @@ BitmapShouldInitializeSharedState(ParallelBitmapHeapState *pstate)
 
 	while (1)
 	{
-		SpinLockAcquire(&pstate->mutex);
-		state = pstate->state;
-		if (pstate->state == BM_INITIAL)
-			pstate->state = BM_INPROGRESS;
-		SpinLockRelease(&pstate->mutex);
+		state = BM_INITIAL;
+		pg_atomic_compare_exchange_u32(&pstate->state, &state, BM_INPROGRESS);
 
 		/* Exit if bitmap is done, or if we're the leader. */
 		if (state != BM_INPROGRESS)
@@ -538,9 +531,7 @@ ExecBitmapHeapInitializeDSM(BitmapHeapScanState *node,
 
 	pstate->tbmiterator = 0;
 
-	/* Initialize the mutex */
-	SpinLockInit(&pstate->mutex);
-	pstate->state = BM_INITIAL;
+	pg_atomic_init_u32(&pstate->state, BM_INITIAL);
 
 	ConditionVariableInit(&pstate->cv);
 
@@ -565,7 +556,7 @@ ExecBitmapHeapReInitializeDSM(BitmapHeapScanState *node,
 	if (dsa == NULL)
 		return;
 
-	pstate->state = BM_INITIAL;
+	pg_atomic_write_u32(&pstate->state, BM_INITIAL);
 
 	if (DsaPointerIsValid(pstate->tbmiterator))
 		tbm_free_shared_area(dsa, pstate->tbmiterator);
-- 
2.50.1 (Apple Git-155)


--Ot5x3ffkWEuxilWO
Content-Type: text/plain; charset=us-ascii
Content-Disposition: attachment;
	filename=v1-0003-convert-FixedParallelState-last_xlog_end-to-an-at.patch



^ permalink  raw  reply  [nested|flat] 440+ messages in thread

* [PATCH v1 2/8] convert ParallelBitmapHeapState->state to an atomic
@ 2026-07-09 18:38 Nathan Bossart <nathan@postgresql.org>
  0 siblings, 0 replies; 440+ messages in thread

From: Nathan Bossart @ 2026-07-09 18:38 UTC (permalink / raw)

---
 src/backend/executor/nodeBitmapHeapscan.c | 21 ++++++---------------
 1 file changed, 6 insertions(+), 15 deletions(-)

diff --git a/src/backend/executor/nodeBitmapHeapscan.c b/src/backend/executor/nodeBitmapHeapscan.c
index 83d6478bc2b..f2bb487bf10 100644
--- a/src/backend/executor/nodeBitmapHeapscan.c
+++ b/src/backend/executor/nodeBitmapHeapscan.c
@@ -79,7 +79,6 @@ typedef enum
 /* ----------------
  *	 ParallelBitmapHeapState information
  *		tbmiterator				iterator for scanning current pages
- *		mutex					mutual exclusion for state
  *		state					current state of the TIDBitmap
  *		cv						conditional wait variable
  * ----------------
@@ -87,8 +86,7 @@ typedef enum
 typedef struct ParallelBitmapHeapState
 {
 	dsa_pointer tbmiterator;
-	slock_t		mutex;
-	SharedBitmapState state;
+	pg_atomic_uint32 state;
 	ConditionVariable cv;
 } ParallelBitmapHeapState;
 
@@ -228,9 +226,7 @@ BitmapHeapNext(BitmapHeapScanState *node)
 static inline void
 BitmapDoneInitializingSharedState(ParallelBitmapHeapState *pstate)
 {
-	SpinLockAcquire(&pstate->mutex);
-	pstate->state = BM_FINISHED;
-	SpinLockRelease(&pstate->mutex);
+	pg_atomic_write_membarrier_u32(&pstate->state, BM_FINISHED);
 	ConditionVariableBroadcast(&pstate->cv);
 }
 
@@ -480,11 +476,8 @@ BitmapShouldInitializeSharedState(ParallelBitmapHeapState *pstate)
 
 	while (1)
 	{
-		SpinLockAcquire(&pstate->mutex);
-		state = pstate->state;
-		if (pstate->state == BM_INITIAL)
-			pstate->state = BM_INPROGRESS;
-		SpinLockRelease(&pstate->mutex);
+		state = BM_INITIAL;
+		pg_atomic_compare_exchange_u32(&pstate->state, &state, BM_INPROGRESS);
 
 		/* Exit if bitmap is done, or if we're the leader. */
 		if (state != BM_INPROGRESS)
@@ -538,9 +531,7 @@ ExecBitmapHeapInitializeDSM(BitmapHeapScanState *node,
 
 	pstate->tbmiterator = 0;
 
-	/* Initialize the mutex */
-	SpinLockInit(&pstate->mutex);
-	pstate->state = BM_INITIAL;
+	pg_atomic_init_u32(&pstate->state, BM_INITIAL);
 
 	ConditionVariableInit(&pstate->cv);
 
@@ -565,7 +556,7 @@ ExecBitmapHeapReInitializeDSM(BitmapHeapScanState *node,
 	if (dsa == NULL)
 		return;
 
-	pstate->state = BM_INITIAL;
+	pg_atomic_write_u32(&pstate->state, BM_INITIAL);
 
 	if (DsaPointerIsValid(pstate->tbmiterator))
 		tbm_free_shared_area(dsa, pstate->tbmiterator);
-- 
2.50.1 (Apple Git-155)


--Ot5x3ffkWEuxilWO
Content-Type: text/plain; charset=us-ascii
Content-Disposition: attachment;
	filename=v1-0003-convert-FixedParallelState-last_xlog_end-to-an-at.patch



^ permalink  raw  reply  [nested|flat] 440+ messages in thread

* [PATCH v1 2/8] convert ParallelBitmapHeapState->state to an atomic
@ 2026-07-09 18:38 Nathan Bossart <nathan@postgresql.org>
  0 siblings, 0 replies; 440+ messages in thread

From: Nathan Bossart @ 2026-07-09 18:38 UTC (permalink / raw)

---
 src/backend/executor/nodeBitmapHeapscan.c | 21 ++++++---------------
 1 file changed, 6 insertions(+), 15 deletions(-)

diff --git a/src/backend/executor/nodeBitmapHeapscan.c b/src/backend/executor/nodeBitmapHeapscan.c
index 83d6478bc2b..f2bb487bf10 100644
--- a/src/backend/executor/nodeBitmapHeapscan.c
+++ b/src/backend/executor/nodeBitmapHeapscan.c
@@ -79,7 +79,6 @@ typedef enum
 /* ----------------
  *	 ParallelBitmapHeapState information
  *		tbmiterator				iterator for scanning current pages
- *		mutex					mutual exclusion for state
  *		state					current state of the TIDBitmap
  *		cv						conditional wait variable
  * ----------------
@@ -87,8 +86,7 @@ typedef enum
 typedef struct ParallelBitmapHeapState
 {
 	dsa_pointer tbmiterator;
-	slock_t		mutex;
-	SharedBitmapState state;
+	pg_atomic_uint32 state;
 	ConditionVariable cv;
 } ParallelBitmapHeapState;
 
@@ -228,9 +226,7 @@ BitmapHeapNext(BitmapHeapScanState *node)
 static inline void
 BitmapDoneInitializingSharedState(ParallelBitmapHeapState *pstate)
 {
-	SpinLockAcquire(&pstate->mutex);
-	pstate->state = BM_FINISHED;
-	SpinLockRelease(&pstate->mutex);
+	pg_atomic_write_membarrier_u32(&pstate->state, BM_FINISHED);
 	ConditionVariableBroadcast(&pstate->cv);
 }
 
@@ -480,11 +476,8 @@ BitmapShouldInitializeSharedState(ParallelBitmapHeapState *pstate)
 
 	while (1)
 	{
-		SpinLockAcquire(&pstate->mutex);
-		state = pstate->state;
-		if (pstate->state == BM_INITIAL)
-			pstate->state = BM_INPROGRESS;
-		SpinLockRelease(&pstate->mutex);
+		state = BM_INITIAL;
+		pg_atomic_compare_exchange_u32(&pstate->state, &state, BM_INPROGRESS);
 
 		/* Exit if bitmap is done, or if we're the leader. */
 		if (state != BM_INPROGRESS)
@@ -538,9 +531,7 @@ ExecBitmapHeapInitializeDSM(BitmapHeapScanState *node,
 
 	pstate->tbmiterator = 0;
 
-	/* Initialize the mutex */
-	SpinLockInit(&pstate->mutex);
-	pstate->state = BM_INITIAL;
+	pg_atomic_init_u32(&pstate->state, BM_INITIAL);
 
 	ConditionVariableInit(&pstate->cv);
 
@@ -565,7 +556,7 @@ ExecBitmapHeapReInitializeDSM(BitmapHeapScanState *node,
 	if (dsa == NULL)
 		return;
 
-	pstate->state = BM_INITIAL;
+	pg_atomic_write_u32(&pstate->state, BM_INITIAL);
 
 	if (DsaPointerIsValid(pstate->tbmiterator))
 		tbm_free_shared_area(dsa, pstate->tbmiterator);
-- 
2.50.1 (Apple Git-155)


--Ot5x3ffkWEuxilWO
Content-Type: text/plain; charset=us-ascii
Content-Disposition: attachment;
	filename=v1-0003-convert-FixedParallelState-last_xlog_end-to-an-at.patch



^ permalink  raw  reply  [nested|flat] 440+ messages in thread

* [PATCH v1 2/8] convert ParallelBitmapHeapState->state to an atomic
@ 2026-07-09 18:38 Nathan Bossart <nathan@postgresql.org>
  0 siblings, 0 replies; 440+ messages in thread

From: Nathan Bossart @ 2026-07-09 18:38 UTC (permalink / raw)

---
 src/backend/executor/nodeBitmapHeapscan.c | 21 ++++++---------------
 1 file changed, 6 insertions(+), 15 deletions(-)

diff --git a/src/backend/executor/nodeBitmapHeapscan.c b/src/backend/executor/nodeBitmapHeapscan.c
index 83d6478bc2b..f2bb487bf10 100644
--- a/src/backend/executor/nodeBitmapHeapscan.c
+++ b/src/backend/executor/nodeBitmapHeapscan.c
@@ -79,7 +79,6 @@ typedef enum
 /* ----------------
  *	 ParallelBitmapHeapState information
  *		tbmiterator				iterator for scanning current pages
- *		mutex					mutual exclusion for state
  *		state					current state of the TIDBitmap
  *		cv						conditional wait variable
  * ----------------
@@ -87,8 +86,7 @@ typedef enum
 typedef struct ParallelBitmapHeapState
 {
 	dsa_pointer tbmiterator;
-	slock_t		mutex;
-	SharedBitmapState state;
+	pg_atomic_uint32 state;
 	ConditionVariable cv;
 } ParallelBitmapHeapState;
 
@@ -228,9 +226,7 @@ BitmapHeapNext(BitmapHeapScanState *node)
 static inline void
 BitmapDoneInitializingSharedState(ParallelBitmapHeapState *pstate)
 {
-	SpinLockAcquire(&pstate->mutex);
-	pstate->state = BM_FINISHED;
-	SpinLockRelease(&pstate->mutex);
+	pg_atomic_write_membarrier_u32(&pstate->state, BM_FINISHED);
 	ConditionVariableBroadcast(&pstate->cv);
 }
 
@@ -480,11 +476,8 @@ BitmapShouldInitializeSharedState(ParallelBitmapHeapState *pstate)
 
 	while (1)
 	{
-		SpinLockAcquire(&pstate->mutex);
-		state = pstate->state;
-		if (pstate->state == BM_INITIAL)
-			pstate->state = BM_INPROGRESS;
-		SpinLockRelease(&pstate->mutex);
+		state = BM_INITIAL;
+		pg_atomic_compare_exchange_u32(&pstate->state, &state, BM_INPROGRESS);
 
 		/* Exit if bitmap is done, or if we're the leader. */
 		if (state != BM_INPROGRESS)
@@ -538,9 +531,7 @@ ExecBitmapHeapInitializeDSM(BitmapHeapScanState *node,
 
 	pstate->tbmiterator = 0;
 
-	/* Initialize the mutex */
-	SpinLockInit(&pstate->mutex);
-	pstate->state = BM_INITIAL;
+	pg_atomic_init_u32(&pstate->state, BM_INITIAL);
 
 	ConditionVariableInit(&pstate->cv);
 
@@ -565,7 +556,7 @@ ExecBitmapHeapReInitializeDSM(BitmapHeapScanState *node,
 	if (dsa == NULL)
 		return;
 
-	pstate->state = BM_INITIAL;
+	pg_atomic_write_u32(&pstate->state, BM_INITIAL);
 
 	if (DsaPointerIsValid(pstate->tbmiterator))
 		tbm_free_shared_area(dsa, pstate->tbmiterator);
-- 
2.50.1 (Apple Git-155)


--Ot5x3ffkWEuxilWO
Content-Type: text/plain; charset=us-ascii
Content-Disposition: attachment;
	filename=v1-0003-convert-FixedParallelState-last_xlog_end-to-an-at.patch



^ permalink  raw  reply  [nested|flat] 440+ messages in thread

* [PATCH v2 2/9] convert ParallelBitmapHeapState->state to an atomic
@ 2026-07-09 18:38 Nathan Bossart <nathan@postgresql.org>
  0 siblings, 0 replies; 440+ messages in thread

From: Nathan Bossart @ 2026-07-09 18:38 UTC (permalink / raw)

---
 src/backend/executor/nodeBitmapHeapscan.c | 23 +++++++----------------
 1 file changed, 7 insertions(+), 16 deletions(-)

diff --git a/src/backend/executor/nodeBitmapHeapscan.c b/src/backend/executor/nodeBitmapHeapscan.c
index 83d6478bc2b..a9e83f30687 100644
--- a/src/backend/executor/nodeBitmapHeapscan.c
+++ b/src/backend/executor/nodeBitmapHeapscan.c
@@ -79,7 +79,6 @@ typedef enum
 /* ----------------
  *	 ParallelBitmapHeapState information
  *		tbmiterator				iterator for scanning current pages
- *		mutex					mutual exclusion for state
  *		state					current state of the TIDBitmap
  *		cv						conditional wait variable
  * ----------------
@@ -87,8 +86,7 @@ typedef enum
 typedef struct ParallelBitmapHeapState
 {
 	dsa_pointer tbmiterator;
-	slock_t		mutex;
-	SharedBitmapState state;
+	pg_atomic_uint32 state;
 	ConditionVariable cv;
 } ParallelBitmapHeapState;
 
@@ -228,9 +226,7 @@ BitmapHeapNext(BitmapHeapScanState *node)
 static inline void
 BitmapDoneInitializingSharedState(ParallelBitmapHeapState *pstate)
 {
-	SpinLockAcquire(&pstate->mutex);
-	pstate->state = BM_FINISHED;
-	SpinLockRelease(&pstate->mutex);
+	pg_atomic_write_membarrier_u32(&pstate->state, BM_FINISHED);
 	ConditionVariableBroadcast(&pstate->cv);
 }
 
@@ -476,15 +472,12 @@ ExecInitBitmapHeapScan(BitmapHeapScan *node, EState *estate, int eflags)
 static bool
 BitmapShouldInitializeSharedState(ParallelBitmapHeapState *pstate)
 {
-	SharedBitmapState state;
+	uint32		state;
 
 	while (1)
 	{
-		SpinLockAcquire(&pstate->mutex);
-		state = pstate->state;
-		if (pstate->state == BM_INITIAL)
-			pstate->state = BM_INPROGRESS;
-		SpinLockRelease(&pstate->mutex);
+		state = BM_INITIAL;
+		pg_atomic_compare_exchange_u32(&pstate->state, &state, BM_INPROGRESS);
 
 		/* Exit if bitmap is done, or if we're the leader. */
 		if (state != BM_INPROGRESS)
@@ -538,9 +531,7 @@ ExecBitmapHeapInitializeDSM(BitmapHeapScanState *node,
 
 	pstate->tbmiterator = 0;
 
-	/* Initialize the mutex */
-	SpinLockInit(&pstate->mutex);
-	pstate->state = BM_INITIAL;
+	pg_atomic_init_u32(&pstate->state, BM_INITIAL);
 
 	ConditionVariableInit(&pstate->cv);
 
@@ -565,7 +556,7 @@ ExecBitmapHeapReInitializeDSM(BitmapHeapScanState *node,
 	if (dsa == NULL)
 		return;
 
-	pstate->state = BM_INITIAL;
+	pg_atomic_write_u32(&pstate->state, BM_INITIAL);
 
 	if (DsaPointerIsValid(pstate->tbmiterator))
 		tbm_free_shared_area(dsa, pstate->tbmiterator);
-- 
2.50.1 (Apple Git-155)


--Xf36GNcW+0xZNily
Content-Type: text/plain; charset=us-ascii
Content-Disposition: attachment;
	filename=v2-0003-convert-FixedParallelState-last_xlog_end-to-an-at.patch



^ permalink  raw  reply  [nested|flat] 440+ messages in thread

* [PATCH v1 2/8] convert ParallelBitmapHeapState->state to an atomic
@ 2026-07-09 18:38 Nathan Bossart <nathan@postgresql.org>
  0 siblings, 0 replies; 440+ messages in thread

From: Nathan Bossart @ 2026-07-09 18:38 UTC (permalink / raw)

---
 src/backend/executor/nodeBitmapHeapscan.c | 21 ++++++---------------
 1 file changed, 6 insertions(+), 15 deletions(-)

diff --git a/src/backend/executor/nodeBitmapHeapscan.c b/src/backend/executor/nodeBitmapHeapscan.c
index 83d6478bc2b..f2bb487bf10 100644
--- a/src/backend/executor/nodeBitmapHeapscan.c
+++ b/src/backend/executor/nodeBitmapHeapscan.c
@@ -79,7 +79,6 @@ typedef enum
 /* ----------------
  *	 ParallelBitmapHeapState information
  *		tbmiterator				iterator for scanning current pages
- *		mutex					mutual exclusion for state
  *		state					current state of the TIDBitmap
  *		cv						conditional wait variable
  * ----------------
@@ -87,8 +86,7 @@ typedef enum
 typedef struct ParallelBitmapHeapState
 {
 	dsa_pointer tbmiterator;
-	slock_t		mutex;
-	SharedBitmapState state;
+	pg_atomic_uint32 state;
 	ConditionVariable cv;
 } ParallelBitmapHeapState;
 
@@ -228,9 +226,7 @@ BitmapHeapNext(BitmapHeapScanState *node)
 static inline void
 BitmapDoneInitializingSharedState(ParallelBitmapHeapState *pstate)
 {
-	SpinLockAcquire(&pstate->mutex);
-	pstate->state = BM_FINISHED;
-	SpinLockRelease(&pstate->mutex);
+	pg_atomic_write_membarrier_u32(&pstate->state, BM_FINISHED);
 	ConditionVariableBroadcast(&pstate->cv);
 }
 
@@ -480,11 +476,8 @@ BitmapShouldInitializeSharedState(ParallelBitmapHeapState *pstate)
 
 	while (1)
 	{
-		SpinLockAcquire(&pstate->mutex);
-		state = pstate->state;
-		if (pstate->state == BM_INITIAL)
-			pstate->state = BM_INPROGRESS;
-		SpinLockRelease(&pstate->mutex);
+		state = BM_INITIAL;
+		pg_atomic_compare_exchange_u32(&pstate->state, &state, BM_INPROGRESS);
 
 		/* Exit if bitmap is done, or if we're the leader. */
 		if (state != BM_INPROGRESS)
@@ -538,9 +531,7 @@ ExecBitmapHeapInitializeDSM(BitmapHeapScanState *node,
 
 	pstate->tbmiterator = 0;
 
-	/* Initialize the mutex */
-	SpinLockInit(&pstate->mutex);
-	pstate->state = BM_INITIAL;
+	pg_atomic_init_u32(&pstate->state, BM_INITIAL);
 
 	ConditionVariableInit(&pstate->cv);
 
@@ -565,7 +556,7 @@ ExecBitmapHeapReInitializeDSM(BitmapHeapScanState *node,
 	if (dsa == NULL)
 		return;
 
-	pstate->state = BM_INITIAL;
+	pg_atomic_write_u32(&pstate->state, BM_INITIAL);
 
 	if (DsaPointerIsValid(pstate->tbmiterator))
 		tbm_free_shared_area(dsa, pstate->tbmiterator);
-- 
2.50.1 (Apple Git-155)


--Ot5x3ffkWEuxilWO
Content-Type: text/plain; charset=us-ascii
Content-Disposition: attachment;
	filename=v1-0003-convert-FixedParallelState-last_xlog_end-to-an-at.patch



^ permalink  raw  reply  [nested|flat] 440+ messages in thread

* [PATCH v1 2/8] convert ParallelBitmapHeapState->state to an atomic
@ 2026-07-09 18:38 Nathan Bossart <nathan@postgresql.org>
  0 siblings, 0 replies; 440+ messages in thread

From: Nathan Bossart @ 2026-07-09 18:38 UTC (permalink / raw)

---
 src/backend/executor/nodeBitmapHeapscan.c | 21 ++++++---------------
 1 file changed, 6 insertions(+), 15 deletions(-)

diff --git a/src/backend/executor/nodeBitmapHeapscan.c b/src/backend/executor/nodeBitmapHeapscan.c
index 83d6478bc2b..f2bb487bf10 100644
--- a/src/backend/executor/nodeBitmapHeapscan.c
+++ b/src/backend/executor/nodeBitmapHeapscan.c
@@ -79,7 +79,6 @@ typedef enum
 /* ----------------
  *	 ParallelBitmapHeapState information
  *		tbmiterator				iterator for scanning current pages
- *		mutex					mutual exclusion for state
  *		state					current state of the TIDBitmap
  *		cv						conditional wait variable
  * ----------------
@@ -87,8 +86,7 @@ typedef enum
 typedef struct ParallelBitmapHeapState
 {
 	dsa_pointer tbmiterator;
-	slock_t		mutex;
-	SharedBitmapState state;
+	pg_atomic_uint32 state;
 	ConditionVariable cv;
 } ParallelBitmapHeapState;
 
@@ -228,9 +226,7 @@ BitmapHeapNext(BitmapHeapScanState *node)
 static inline void
 BitmapDoneInitializingSharedState(ParallelBitmapHeapState *pstate)
 {
-	SpinLockAcquire(&pstate->mutex);
-	pstate->state = BM_FINISHED;
-	SpinLockRelease(&pstate->mutex);
+	pg_atomic_write_membarrier_u32(&pstate->state, BM_FINISHED);
 	ConditionVariableBroadcast(&pstate->cv);
 }
 
@@ -480,11 +476,8 @@ BitmapShouldInitializeSharedState(ParallelBitmapHeapState *pstate)
 
 	while (1)
 	{
-		SpinLockAcquire(&pstate->mutex);
-		state = pstate->state;
-		if (pstate->state == BM_INITIAL)
-			pstate->state = BM_INPROGRESS;
-		SpinLockRelease(&pstate->mutex);
+		state = BM_INITIAL;
+		pg_atomic_compare_exchange_u32(&pstate->state, &state, BM_INPROGRESS);
 
 		/* Exit if bitmap is done, or if we're the leader. */
 		if (state != BM_INPROGRESS)
@@ -538,9 +531,7 @@ ExecBitmapHeapInitializeDSM(BitmapHeapScanState *node,
 
 	pstate->tbmiterator = 0;
 
-	/* Initialize the mutex */
-	SpinLockInit(&pstate->mutex);
-	pstate->state = BM_INITIAL;
+	pg_atomic_init_u32(&pstate->state, BM_INITIAL);
 
 	ConditionVariableInit(&pstate->cv);
 
@@ -565,7 +556,7 @@ ExecBitmapHeapReInitializeDSM(BitmapHeapScanState *node,
 	if (dsa == NULL)
 		return;
 
-	pstate->state = BM_INITIAL;
+	pg_atomic_write_u32(&pstate->state, BM_INITIAL);
 
 	if (DsaPointerIsValid(pstate->tbmiterator))
 		tbm_free_shared_area(dsa, pstate->tbmiterator);
-- 
2.50.1 (Apple Git-155)


--Ot5x3ffkWEuxilWO
Content-Type: text/plain; charset=us-ascii
Content-Disposition: attachment;
	filename=v1-0003-convert-FixedParallelState-last_xlog_end-to-an-at.patch



^ permalink  raw  reply  [nested|flat] 440+ messages in thread

* [PATCH v1 2/8] convert ParallelBitmapHeapState->state to an atomic
@ 2026-07-09 18:38 Nathan Bossart <nathan@postgresql.org>
  0 siblings, 0 replies; 440+ messages in thread

From: Nathan Bossart @ 2026-07-09 18:38 UTC (permalink / raw)

---
 src/backend/executor/nodeBitmapHeapscan.c | 21 ++++++---------------
 1 file changed, 6 insertions(+), 15 deletions(-)

diff --git a/src/backend/executor/nodeBitmapHeapscan.c b/src/backend/executor/nodeBitmapHeapscan.c
index 83d6478bc2b..f2bb487bf10 100644
--- a/src/backend/executor/nodeBitmapHeapscan.c
+++ b/src/backend/executor/nodeBitmapHeapscan.c
@@ -79,7 +79,6 @@ typedef enum
 /* ----------------
  *	 ParallelBitmapHeapState information
  *		tbmiterator				iterator for scanning current pages
- *		mutex					mutual exclusion for state
  *		state					current state of the TIDBitmap
  *		cv						conditional wait variable
  * ----------------
@@ -87,8 +86,7 @@ typedef enum
 typedef struct ParallelBitmapHeapState
 {
 	dsa_pointer tbmiterator;
-	slock_t		mutex;
-	SharedBitmapState state;
+	pg_atomic_uint32 state;
 	ConditionVariable cv;
 } ParallelBitmapHeapState;
 
@@ -228,9 +226,7 @@ BitmapHeapNext(BitmapHeapScanState *node)
 static inline void
 BitmapDoneInitializingSharedState(ParallelBitmapHeapState *pstate)
 {
-	SpinLockAcquire(&pstate->mutex);
-	pstate->state = BM_FINISHED;
-	SpinLockRelease(&pstate->mutex);
+	pg_atomic_write_membarrier_u32(&pstate->state, BM_FINISHED);
 	ConditionVariableBroadcast(&pstate->cv);
 }
 
@@ -480,11 +476,8 @@ BitmapShouldInitializeSharedState(ParallelBitmapHeapState *pstate)
 
 	while (1)
 	{
-		SpinLockAcquire(&pstate->mutex);
-		state = pstate->state;
-		if (pstate->state == BM_INITIAL)
-			pstate->state = BM_INPROGRESS;
-		SpinLockRelease(&pstate->mutex);
+		state = BM_INITIAL;
+		pg_atomic_compare_exchange_u32(&pstate->state, &state, BM_INPROGRESS);
 
 		/* Exit if bitmap is done, or if we're the leader. */
 		if (state != BM_INPROGRESS)
@@ -538,9 +531,7 @@ ExecBitmapHeapInitializeDSM(BitmapHeapScanState *node,
 
 	pstate->tbmiterator = 0;
 
-	/* Initialize the mutex */
-	SpinLockInit(&pstate->mutex);
-	pstate->state = BM_INITIAL;
+	pg_atomic_init_u32(&pstate->state, BM_INITIAL);
 
 	ConditionVariableInit(&pstate->cv);
 
@@ -565,7 +556,7 @@ ExecBitmapHeapReInitializeDSM(BitmapHeapScanState *node,
 	if (dsa == NULL)
 		return;
 
-	pstate->state = BM_INITIAL;
+	pg_atomic_write_u32(&pstate->state, BM_INITIAL);
 
 	if (DsaPointerIsValid(pstate->tbmiterator))
 		tbm_free_shared_area(dsa, pstate->tbmiterator);
-- 
2.50.1 (Apple Git-155)


--Ot5x3ffkWEuxilWO
Content-Type: text/plain; charset=us-ascii
Content-Disposition: attachment;
	filename=v1-0003-convert-FixedParallelState-last_xlog_end-to-an-at.patch



^ permalink  raw  reply  [nested|flat] 440+ messages in thread

* [PATCH v1 2/8] convert ParallelBitmapHeapState->state to an atomic
@ 2026-07-09 18:38 Nathan Bossart <nathan@postgresql.org>
  0 siblings, 0 replies; 440+ messages in thread

From: Nathan Bossart @ 2026-07-09 18:38 UTC (permalink / raw)

---
 src/backend/executor/nodeBitmapHeapscan.c | 21 ++++++---------------
 1 file changed, 6 insertions(+), 15 deletions(-)

diff --git a/src/backend/executor/nodeBitmapHeapscan.c b/src/backend/executor/nodeBitmapHeapscan.c
index 83d6478bc2b..f2bb487bf10 100644
--- a/src/backend/executor/nodeBitmapHeapscan.c
+++ b/src/backend/executor/nodeBitmapHeapscan.c
@@ -79,7 +79,6 @@ typedef enum
 /* ----------------
  *	 ParallelBitmapHeapState information
  *		tbmiterator				iterator for scanning current pages
- *		mutex					mutual exclusion for state
  *		state					current state of the TIDBitmap
  *		cv						conditional wait variable
  * ----------------
@@ -87,8 +86,7 @@ typedef enum
 typedef struct ParallelBitmapHeapState
 {
 	dsa_pointer tbmiterator;
-	slock_t		mutex;
-	SharedBitmapState state;
+	pg_atomic_uint32 state;
 	ConditionVariable cv;
 } ParallelBitmapHeapState;
 
@@ -228,9 +226,7 @@ BitmapHeapNext(BitmapHeapScanState *node)
 static inline void
 BitmapDoneInitializingSharedState(ParallelBitmapHeapState *pstate)
 {
-	SpinLockAcquire(&pstate->mutex);
-	pstate->state = BM_FINISHED;
-	SpinLockRelease(&pstate->mutex);
+	pg_atomic_write_membarrier_u32(&pstate->state, BM_FINISHED);
 	ConditionVariableBroadcast(&pstate->cv);
 }
 
@@ -480,11 +476,8 @@ BitmapShouldInitializeSharedState(ParallelBitmapHeapState *pstate)
 
 	while (1)
 	{
-		SpinLockAcquire(&pstate->mutex);
-		state = pstate->state;
-		if (pstate->state == BM_INITIAL)
-			pstate->state = BM_INPROGRESS;
-		SpinLockRelease(&pstate->mutex);
+		state = BM_INITIAL;
+		pg_atomic_compare_exchange_u32(&pstate->state, &state, BM_INPROGRESS);
 
 		/* Exit if bitmap is done, or if we're the leader. */
 		if (state != BM_INPROGRESS)
@@ -538,9 +531,7 @@ ExecBitmapHeapInitializeDSM(BitmapHeapScanState *node,
 
 	pstate->tbmiterator = 0;
 
-	/* Initialize the mutex */
-	SpinLockInit(&pstate->mutex);
-	pstate->state = BM_INITIAL;
+	pg_atomic_init_u32(&pstate->state, BM_INITIAL);
 
 	ConditionVariableInit(&pstate->cv);
 
@@ -565,7 +556,7 @@ ExecBitmapHeapReInitializeDSM(BitmapHeapScanState *node,
 	if (dsa == NULL)
 		return;
 
-	pstate->state = BM_INITIAL;
+	pg_atomic_write_u32(&pstate->state, BM_INITIAL);
 
 	if (DsaPointerIsValid(pstate->tbmiterator))
 		tbm_free_shared_area(dsa, pstate->tbmiterator);
-- 
2.50.1 (Apple Git-155)


--Ot5x3ffkWEuxilWO
Content-Type: text/plain; charset=us-ascii
Content-Disposition: attachment;
	filename=v1-0003-convert-FixedParallelState-last_xlog_end-to-an-at.patch



^ permalink  raw  reply  [nested|flat] 440+ messages in thread

* [PATCH v1 2/8] convert ParallelBitmapHeapState->state to an atomic
@ 2026-07-09 18:38 Nathan Bossart <nathan@postgresql.org>
  0 siblings, 0 replies; 440+ messages in thread

From: Nathan Bossart @ 2026-07-09 18:38 UTC (permalink / raw)

---
 src/backend/executor/nodeBitmapHeapscan.c | 21 ++++++---------------
 1 file changed, 6 insertions(+), 15 deletions(-)

diff --git a/src/backend/executor/nodeBitmapHeapscan.c b/src/backend/executor/nodeBitmapHeapscan.c
index 83d6478bc2b..f2bb487bf10 100644
--- a/src/backend/executor/nodeBitmapHeapscan.c
+++ b/src/backend/executor/nodeBitmapHeapscan.c
@@ -79,7 +79,6 @@ typedef enum
 /* ----------------
  *	 ParallelBitmapHeapState information
  *		tbmiterator				iterator for scanning current pages
- *		mutex					mutual exclusion for state
  *		state					current state of the TIDBitmap
  *		cv						conditional wait variable
  * ----------------
@@ -87,8 +86,7 @@ typedef enum
 typedef struct ParallelBitmapHeapState
 {
 	dsa_pointer tbmiterator;
-	slock_t		mutex;
-	SharedBitmapState state;
+	pg_atomic_uint32 state;
 	ConditionVariable cv;
 } ParallelBitmapHeapState;
 
@@ -228,9 +226,7 @@ BitmapHeapNext(BitmapHeapScanState *node)
 static inline void
 BitmapDoneInitializingSharedState(ParallelBitmapHeapState *pstate)
 {
-	SpinLockAcquire(&pstate->mutex);
-	pstate->state = BM_FINISHED;
-	SpinLockRelease(&pstate->mutex);
+	pg_atomic_write_membarrier_u32(&pstate->state, BM_FINISHED);
 	ConditionVariableBroadcast(&pstate->cv);
 }
 
@@ -480,11 +476,8 @@ BitmapShouldInitializeSharedState(ParallelBitmapHeapState *pstate)
 
 	while (1)
 	{
-		SpinLockAcquire(&pstate->mutex);
-		state = pstate->state;
-		if (pstate->state == BM_INITIAL)
-			pstate->state = BM_INPROGRESS;
-		SpinLockRelease(&pstate->mutex);
+		state = BM_INITIAL;
+		pg_atomic_compare_exchange_u32(&pstate->state, &state, BM_INPROGRESS);
 
 		/* Exit if bitmap is done, or if we're the leader. */
 		if (state != BM_INPROGRESS)
@@ -538,9 +531,7 @@ ExecBitmapHeapInitializeDSM(BitmapHeapScanState *node,
 
 	pstate->tbmiterator = 0;
 
-	/* Initialize the mutex */
-	SpinLockInit(&pstate->mutex);
-	pstate->state = BM_INITIAL;
+	pg_atomic_init_u32(&pstate->state, BM_INITIAL);
 
 	ConditionVariableInit(&pstate->cv);
 
@@ -565,7 +556,7 @@ ExecBitmapHeapReInitializeDSM(BitmapHeapScanState *node,
 	if (dsa == NULL)
 		return;
 
-	pstate->state = BM_INITIAL;
+	pg_atomic_write_u32(&pstate->state, BM_INITIAL);
 
 	if (DsaPointerIsValid(pstate->tbmiterator))
 		tbm_free_shared_area(dsa, pstate->tbmiterator);
-- 
2.50.1 (Apple Git-155)


--Ot5x3ffkWEuxilWO
Content-Type: text/plain; charset=us-ascii
Content-Disposition: attachment;
	filename=v1-0003-convert-FixedParallelState-last_xlog_end-to-an-at.patch



^ permalink  raw  reply  [nested|flat] 440+ messages in thread

* [PATCH v2 2/9] convert ParallelBitmapHeapState->state to an atomic
@ 2026-07-09 18:38 Nathan Bossart <nathan@postgresql.org>
  0 siblings, 0 replies; 440+ messages in thread

From: Nathan Bossart @ 2026-07-09 18:38 UTC (permalink / raw)

---
 src/backend/executor/nodeBitmapHeapscan.c | 23 +++++++----------------
 1 file changed, 7 insertions(+), 16 deletions(-)

diff --git a/src/backend/executor/nodeBitmapHeapscan.c b/src/backend/executor/nodeBitmapHeapscan.c
index 83d6478bc2b..a9e83f30687 100644
--- a/src/backend/executor/nodeBitmapHeapscan.c
+++ b/src/backend/executor/nodeBitmapHeapscan.c
@@ -79,7 +79,6 @@ typedef enum
 /* ----------------
  *	 ParallelBitmapHeapState information
  *		tbmiterator				iterator for scanning current pages
- *		mutex					mutual exclusion for state
  *		state					current state of the TIDBitmap
  *		cv						conditional wait variable
  * ----------------
@@ -87,8 +86,7 @@ typedef enum
 typedef struct ParallelBitmapHeapState
 {
 	dsa_pointer tbmiterator;
-	slock_t		mutex;
-	SharedBitmapState state;
+	pg_atomic_uint32 state;
 	ConditionVariable cv;
 } ParallelBitmapHeapState;
 
@@ -228,9 +226,7 @@ BitmapHeapNext(BitmapHeapScanState *node)
 static inline void
 BitmapDoneInitializingSharedState(ParallelBitmapHeapState *pstate)
 {
-	SpinLockAcquire(&pstate->mutex);
-	pstate->state = BM_FINISHED;
-	SpinLockRelease(&pstate->mutex);
+	pg_atomic_write_membarrier_u32(&pstate->state, BM_FINISHED);
 	ConditionVariableBroadcast(&pstate->cv);
 }
 
@@ -476,15 +472,12 @@ ExecInitBitmapHeapScan(BitmapHeapScan *node, EState *estate, int eflags)
 static bool
 BitmapShouldInitializeSharedState(ParallelBitmapHeapState *pstate)
 {
-	SharedBitmapState state;
+	uint32		state;
 
 	while (1)
 	{
-		SpinLockAcquire(&pstate->mutex);
-		state = pstate->state;
-		if (pstate->state == BM_INITIAL)
-			pstate->state = BM_INPROGRESS;
-		SpinLockRelease(&pstate->mutex);
+		state = BM_INITIAL;
+		pg_atomic_compare_exchange_u32(&pstate->state, &state, BM_INPROGRESS);
 
 		/* Exit if bitmap is done, or if we're the leader. */
 		if (state != BM_INPROGRESS)
@@ -538,9 +531,7 @@ ExecBitmapHeapInitializeDSM(BitmapHeapScanState *node,
 
 	pstate->tbmiterator = 0;
 
-	/* Initialize the mutex */
-	SpinLockInit(&pstate->mutex);
-	pstate->state = BM_INITIAL;
+	pg_atomic_init_u32(&pstate->state, BM_INITIAL);
 
 	ConditionVariableInit(&pstate->cv);
 
@@ -565,7 +556,7 @@ ExecBitmapHeapReInitializeDSM(BitmapHeapScanState *node,
 	if (dsa == NULL)
 		return;
 
-	pstate->state = BM_INITIAL;
+	pg_atomic_write_u32(&pstate->state, BM_INITIAL);
 
 	if (DsaPointerIsValid(pstate->tbmiterator))
 		tbm_free_shared_area(dsa, pstate->tbmiterator);
-- 
2.50.1 (Apple Git-155)


--Xf36GNcW+0xZNily
Content-Type: text/plain; charset=us-ascii
Content-Disposition: attachment;
	filename=v2-0003-convert-FixedParallelState-last_xlog_end-to-an-at.patch



^ permalink  raw  reply  [nested|flat] 440+ messages in thread

* [PATCH v1 2/8] convert ParallelBitmapHeapState->state to an atomic
@ 2026-07-09 18:38 Nathan Bossart <nathan@postgresql.org>
  0 siblings, 0 replies; 440+ messages in thread

From: Nathan Bossart @ 2026-07-09 18:38 UTC (permalink / raw)

---
 src/backend/executor/nodeBitmapHeapscan.c | 21 ++++++---------------
 1 file changed, 6 insertions(+), 15 deletions(-)

diff --git a/src/backend/executor/nodeBitmapHeapscan.c b/src/backend/executor/nodeBitmapHeapscan.c
index 83d6478bc2b..f2bb487bf10 100644
--- a/src/backend/executor/nodeBitmapHeapscan.c
+++ b/src/backend/executor/nodeBitmapHeapscan.c
@@ -79,7 +79,6 @@ typedef enum
 /* ----------------
  *	 ParallelBitmapHeapState information
  *		tbmiterator				iterator for scanning current pages
- *		mutex					mutual exclusion for state
  *		state					current state of the TIDBitmap
  *		cv						conditional wait variable
  * ----------------
@@ -87,8 +86,7 @@ typedef enum
 typedef struct ParallelBitmapHeapState
 {
 	dsa_pointer tbmiterator;
-	slock_t		mutex;
-	SharedBitmapState state;
+	pg_atomic_uint32 state;
 	ConditionVariable cv;
 } ParallelBitmapHeapState;
 
@@ -228,9 +226,7 @@ BitmapHeapNext(BitmapHeapScanState *node)
 static inline void
 BitmapDoneInitializingSharedState(ParallelBitmapHeapState *pstate)
 {
-	SpinLockAcquire(&pstate->mutex);
-	pstate->state = BM_FINISHED;
-	SpinLockRelease(&pstate->mutex);
+	pg_atomic_write_membarrier_u32(&pstate->state, BM_FINISHED);
 	ConditionVariableBroadcast(&pstate->cv);
 }
 
@@ -480,11 +476,8 @@ BitmapShouldInitializeSharedState(ParallelBitmapHeapState *pstate)
 
 	while (1)
 	{
-		SpinLockAcquire(&pstate->mutex);
-		state = pstate->state;
-		if (pstate->state == BM_INITIAL)
-			pstate->state = BM_INPROGRESS;
-		SpinLockRelease(&pstate->mutex);
+		state = BM_INITIAL;
+		pg_atomic_compare_exchange_u32(&pstate->state, &state, BM_INPROGRESS);
 
 		/* Exit if bitmap is done, or if we're the leader. */
 		if (state != BM_INPROGRESS)
@@ -538,9 +531,7 @@ ExecBitmapHeapInitializeDSM(BitmapHeapScanState *node,
 
 	pstate->tbmiterator = 0;
 
-	/* Initialize the mutex */
-	SpinLockInit(&pstate->mutex);
-	pstate->state = BM_INITIAL;
+	pg_atomic_init_u32(&pstate->state, BM_INITIAL);
 
 	ConditionVariableInit(&pstate->cv);
 
@@ -565,7 +556,7 @@ ExecBitmapHeapReInitializeDSM(BitmapHeapScanState *node,
 	if (dsa == NULL)
 		return;
 
-	pstate->state = BM_INITIAL;
+	pg_atomic_write_u32(&pstate->state, BM_INITIAL);
 
 	if (DsaPointerIsValid(pstate->tbmiterator))
 		tbm_free_shared_area(dsa, pstate->tbmiterator);
-- 
2.50.1 (Apple Git-155)


--Ot5x3ffkWEuxilWO
Content-Type: text/plain; charset=us-ascii
Content-Disposition: attachment;
	filename=v1-0003-convert-FixedParallelState-last_xlog_end-to-an-at.patch



^ permalink  raw  reply  [nested|flat] 440+ messages in thread

* [PATCH v1 2/8] convert ParallelBitmapHeapState->state to an atomic
@ 2026-07-09 18:38 Nathan Bossart <nathan@postgresql.org>
  0 siblings, 0 replies; 440+ messages in thread

From: Nathan Bossart @ 2026-07-09 18:38 UTC (permalink / raw)

---
 src/backend/executor/nodeBitmapHeapscan.c | 21 ++++++---------------
 1 file changed, 6 insertions(+), 15 deletions(-)

diff --git a/src/backend/executor/nodeBitmapHeapscan.c b/src/backend/executor/nodeBitmapHeapscan.c
index 83d6478bc2b..f2bb487bf10 100644
--- a/src/backend/executor/nodeBitmapHeapscan.c
+++ b/src/backend/executor/nodeBitmapHeapscan.c
@@ -79,7 +79,6 @@ typedef enum
 /* ----------------
  *	 ParallelBitmapHeapState information
  *		tbmiterator				iterator for scanning current pages
- *		mutex					mutual exclusion for state
  *		state					current state of the TIDBitmap
  *		cv						conditional wait variable
  * ----------------
@@ -87,8 +86,7 @@ typedef enum
 typedef struct ParallelBitmapHeapState
 {
 	dsa_pointer tbmiterator;
-	slock_t		mutex;
-	SharedBitmapState state;
+	pg_atomic_uint32 state;
 	ConditionVariable cv;
 } ParallelBitmapHeapState;
 
@@ -228,9 +226,7 @@ BitmapHeapNext(BitmapHeapScanState *node)
 static inline void
 BitmapDoneInitializingSharedState(ParallelBitmapHeapState *pstate)
 {
-	SpinLockAcquire(&pstate->mutex);
-	pstate->state = BM_FINISHED;
-	SpinLockRelease(&pstate->mutex);
+	pg_atomic_write_membarrier_u32(&pstate->state, BM_FINISHED);
 	ConditionVariableBroadcast(&pstate->cv);
 }
 
@@ -480,11 +476,8 @@ BitmapShouldInitializeSharedState(ParallelBitmapHeapState *pstate)
 
 	while (1)
 	{
-		SpinLockAcquire(&pstate->mutex);
-		state = pstate->state;
-		if (pstate->state == BM_INITIAL)
-			pstate->state = BM_INPROGRESS;
-		SpinLockRelease(&pstate->mutex);
+		state = BM_INITIAL;
+		pg_atomic_compare_exchange_u32(&pstate->state, &state, BM_INPROGRESS);
 
 		/* Exit if bitmap is done, or if we're the leader. */
 		if (state != BM_INPROGRESS)
@@ -538,9 +531,7 @@ ExecBitmapHeapInitializeDSM(BitmapHeapScanState *node,
 
 	pstate->tbmiterator = 0;
 
-	/* Initialize the mutex */
-	SpinLockInit(&pstate->mutex);
-	pstate->state = BM_INITIAL;
+	pg_atomic_init_u32(&pstate->state, BM_INITIAL);
 
 	ConditionVariableInit(&pstate->cv);
 
@@ -565,7 +556,7 @@ ExecBitmapHeapReInitializeDSM(BitmapHeapScanState *node,
 	if (dsa == NULL)
 		return;
 
-	pstate->state = BM_INITIAL;
+	pg_atomic_write_u32(&pstate->state, BM_INITIAL);
 
 	if (DsaPointerIsValid(pstate->tbmiterator))
 		tbm_free_shared_area(dsa, pstate->tbmiterator);
-- 
2.50.1 (Apple Git-155)


--Ot5x3ffkWEuxilWO
Content-Type: text/plain; charset=us-ascii
Content-Disposition: attachment;
	filename=v1-0003-convert-FixedParallelState-last_xlog_end-to-an-at.patch



^ permalink  raw  reply  [nested|flat] 440+ messages in thread

* [PATCH v1 2/8] convert ParallelBitmapHeapState->state to an atomic
@ 2026-07-09 18:38 Nathan Bossart <nathan@postgresql.org>
  0 siblings, 0 replies; 440+ messages in thread

From: Nathan Bossart @ 2026-07-09 18:38 UTC (permalink / raw)

---
 src/backend/executor/nodeBitmapHeapscan.c | 21 ++++++---------------
 1 file changed, 6 insertions(+), 15 deletions(-)

diff --git a/src/backend/executor/nodeBitmapHeapscan.c b/src/backend/executor/nodeBitmapHeapscan.c
index 83d6478bc2b..f2bb487bf10 100644
--- a/src/backend/executor/nodeBitmapHeapscan.c
+++ b/src/backend/executor/nodeBitmapHeapscan.c
@@ -79,7 +79,6 @@ typedef enum
 /* ----------------
  *	 ParallelBitmapHeapState information
  *		tbmiterator				iterator for scanning current pages
- *		mutex					mutual exclusion for state
  *		state					current state of the TIDBitmap
  *		cv						conditional wait variable
  * ----------------
@@ -87,8 +86,7 @@ typedef enum
 typedef struct ParallelBitmapHeapState
 {
 	dsa_pointer tbmiterator;
-	slock_t		mutex;
-	SharedBitmapState state;
+	pg_atomic_uint32 state;
 	ConditionVariable cv;
 } ParallelBitmapHeapState;
 
@@ -228,9 +226,7 @@ BitmapHeapNext(BitmapHeapScanState *node)
 static inline void
 BitmapDoneInitializingSharedState(ParallelBitmapHeapState *pstate)
 {
-	SpinLockAcquire(&pstate->mutex);
-	pstate->state = BM_FINISHED;
-	SpinLockRelease(&pstate->mutex);
+	pg_atomic_write_membarrier_u32(&pstate->state, BM_FINISHED);
 	ConditionVariableBroadcast(&pstate->cv);
 }
 
@@ -480,11 +476,8 @@ BitmapShouldInitializeSharedState(ParallelBitmapHeapState *pstate)
 
 	while (1)
 	{
-		SpinLockAcquire(&pstate->mutex);
-		state = pstate->state;
-		if (pstate->state == BM_INITIAL)
-			pstate->state = BM_INPROGRESS;
-		SpinLockRelease(&pstate->mutex);
+		state = BM_INITIAL;
+		pg_atomic_compare_exchange_u32(&pstate->state, &state, BM_INPROGRESS);
 
 		/* Exit if bitmap is done, or if we're the leader. */
 		if (state != BM_INPROGRESS)
@@ -538,9 +531,7 @@ ExecBitmapHeapInitializeDSM(BitmapHeapScanState *node,
 
 	pstate->tbmiterator = 0;
 
-	/* Initialize the mutex */
-	SpinLockInit(&pstate->mutex);
-	pstate->state = BM_INITIAL;
+	pg_atomic_init_u32(&pstate->state, BM_INITIAL);
 
 	ConditionVariableInit(&pstate->cv);
 
@@ -565,7 +556,7 @@ ExecBitmapHeapReInitializeDSM(BitmapHeapScanState *node,
 	if (dsa == NULL)
 		return;
 
-	pstate->state = BM_INITIAL;
+	pg_atomic_write_u32(&pstate->state, BM_INITIAL);
 
 	if (DsaPointerIsValid(pstate->tbmiterator))
 		tbm_free_shared_area(dsa, pstate->tbmiterator);
-- 
2.50.1 (Apple Git-155)


--Ot5x3ffkWEuxilWO
Content-Type: text/plain; charset=us-ascii
Content-Disposition: attachment;
	filename=v1-0003-convert-FixedParallelState-last_xlog_end-to-an-at.patch



^ permalink  raw  reply  [nested|flat] 440+ messages in thread

* [PATCH v1 2/8] convert ParallelBitmapHeapState->state to an atomic
@ 2026-07-09 18:38 Nathan Bossart <nathan@postgresql.org>
  0 siblings, 0 replies; 440+ messages in thread

From: Nathan Bossart @ 2026-07-09 18:38 UTC (permalink / raw)

---
 src/backend/executor/nodeBitmapHeapscan.c | 21 ++++++---------------
 1 file changed, 6 insertions(+), 15 deletions(-)

diff --git a/src/backend/executor/nodeBitmapHeapscan.c b/src/backend/executor/nodeBitmapHeapscan.c
index 83d6478bc2b..f2bb487bf10 100644
--- a/src/backend/executor/nodeBitmapHeapscan.c
+++ b/src/backend/executor/nodeBitmapHeapscan.c
@@ -79,7 +79,6 @@ typedef enum
 /* ----------------
  *	 ParallelBitmapHeapState information
  *		tbmiterator				iterator for scanning current pages
- *		mutex					mutual exclusion for state
  *		state					current state of the TIDBitmap
  *		cv						conditional wait variable
  * ----------------
@@ -87,8 +86,7 @@ typedef enum
 typedef struct ParallelBitmapHeapState
 {
 	dsa_pointer tbmiterator;
-	slock_t		mutex;
-	SharedBitmapState state;
+	pg_atomic_uint32 state;
 	ConditionVariable cv;
 } ParallelBitmapHeapState;
 
@@ -228,9 +226,7 @@ BitmapHeapNext(BitmapHeapScanState *node)
 static inline void
 BitmapDoneInitializingSharedState(ParallelBitmapHeapState *pstate)
 {
-	SpinLockAcquire(&pstate->mutex);
-	pstate->state = BM_FINISHED;
-	SpinLockRelease(&pstate->mutex);
+	pg_atomic_write_membarrier_u32(&pstate->state, BM_FINISHED);
 	ConditionVariableBroadcast(&pstate->cv);
 }
 
@@ -480,11 +476,8 @@ BitmapShouldInitializeSharedState(ParallelBitmapHeapState *pstate)
 
 	while (1)
 	{
-		SpinLockAcquire(&pstate->mutex);
-		state = pstate->state;
-		if (pstate->state == BM_INITIAL)
-			pstate->state = BM_INPROGRESS;
-		SpinLockRelease(&pstate->mutex);
+		state = BM_INITIAL;
+		pg_atomic_compare_exchange_u32(&pstate->state, &state, BM_INPROGRESS);
 
 		/* Exit if bitmap is done, or if we're the leader. */
 		if (state != BM_INPROGRESS)
@@ -538,9 +531,7 @@ ExecBitmapHeapInitializeDSM(BitmapHeapScanState *node,
 
 	pstate->tbmiterator = 0;
 
-	/* Initialize the mutex */
-	SpinLockInit(&pstate->mutex);
-	pstate->state = BM_INITIAL;
+	pg_atomic_init_u32(&pstate->state, BM_INITIAL);
 
 	ConditionVariableInit(&pstate->cv);
 
@@ -565,7 +556,7 @@ ExecBitmapHeapReInitializeDSM(BitmapHeapScanState *node,
 	if (dsa == NULL)
 		return;
 
-	pstate->state = BM_INITIAL;
+	pg_atomic_write_u32(&pstate->state, BM_INITIAL);
 
 	if (DsaPointerIsValid(pstate->tbmiterator))
 		tbm_free_shared_area(dsa, pstate->tbmiterator);
-- 
2.50.1 (Apple Git-155)


--Ot5x3ffkWEuxilWO
Content-Type: text/plain; charset=us-ascii
Content-Disposition: attachment;
	filename=v1-0003-convert-FixedParallelState-last_xlog_end-to-an-at.patch



^ permalink  raw  reply  [nested|flat] 440+ messages in thread

* [PATCH v1 2/8] convert ParallelBitmapHeapState->state to an atomic
@ 2026-07-09 18:38 Nathan Bossart <nathan@postgresql.org>
  0 siblings, 0 replies; 440+ messages in thread

From: Nathan Bossart @ 2026-07-09 18:38 UTC (permalink / raw)

---
 src/backend/executor/nodeBitmapHeapscan.c | 21 ++++++---------------
 1 file changed, 6 insertions(+), 15 deletions(-)

diff --git a/src/backend/executor/nodeBitmapHeapscan.c b/src/backend/executor/nodeBitmapHeapscan.c
index 83d6478bc2b..f2bb487bf10 100644
--- a/src/backend/executor/nodeBitmapHeapscan.c
+++ b/src/backend/executor/nodeBitmapHeapscan.c
@@ -79,7 +79,6 @@ typedef enum
 /* ----------------
  *	 ParallelBitmapHeapState information
  *		tbmiterator				iterator for scanning current pages
- *		mutex					mutual exclusion for state
  *		state					current state of the TIDBitmap
  *		cv						conditional wait variable
  * ----------------
@@ -87,8 +86,7 @@ typedef enum
 typedef struct ParallelBitmapHeapState
 {
 	dsa_pointer tbmiterator;
-	slock_t		mutex;
-	SharedBitmapState state;
+	pg_atomic_uint32 state;
 	ConditionVariable cv;
 } ParallelBitmapHeapState;
 
@@ -228,9 +226,7 @@ BitmapHeapNext(BitmapHeapScanState *node)
 static inline void
 BitmapDoneInitializingSharedState(ParallelBitmapHeapState *pstate)
 {
-	SpinLockAcquire(&pstate->mutex);
-	pstate->state = BM_FINISHED;
-	SpinLockRelease(&pstate->mutex);
+	pg_atomic_write_membarrier_u32(&pstate->state, BM_FINISHED);
 	ConditionVariableBroadcast(&pstate->cv);
 }
 
@@ -480,11 +476,8 @@ BitmapShouldInitializeSharedState(ParallelBitmapHeapState *pstate)
 
 	while (1)
 	{
-		SpinLockAcquire(&pstate->mutex);
-		state = pstate->state;
-		if (pstate->state == BM_INITIAL)
-			pstate->state = BM_INPROGRESS;
-		SpinLockRelease(&pstate->mutex);
+		state = BM_INITIAL;
+		pg_atomic_compare_exchange_u32(&pstate->state, &state, BM_INPROGRESS);
 
 		/* Exit if bitmap is done, or if we're the leader. */
 		if (state != BM_INPROGRESS)
@@ -538,9 +531,7 @@ ExecBitmapHeapInitializeDSM(BitmapHeapScanState *node,
 
 	pstate->tbmiterator = 0;
 
-	/* Initialize the mutex */
-	SpinLockInit(&pstate->mutex);
-	pstate->state = BM_INITIAL;
+	pg_atomic_init_u32(&pstate->state, BM_INITIAL);
 
 	ConditionVariableInit(&pstate->cv);
 
@@ -565,7 +556,7 @@ ExecBitmapHeapReInitializeDSM(BitmapHeapScanState *node,
 	if (dsa == NULL)
 		return;
 
-	pstate->state = BM_INITIAL;
+	pg_atomic_write_u32(&pstate->state, BM_INITIAL);
 
 	if (DsaPointerIsValid(pstate->tbmiterator))
 		tbm_free_shared_area(dsa, pstate->tbmiterator);
-- 
2.50.1 (Apple Git-155)


--Ot5x3ffkWEuxilWO
Content-Type: text/plain; charset=us-ascii
Content-Disposition: attachment;
	filename=v1-0003-convert-FixedParallelState-last_xlog_end-to-an-at.patch



^ permalink  raw  reply  [nested|flat] 440+ messages in thread

* [PATCH v1 2/8] convert ParallelBitmapHeapState->state to an atomic
@ 2026-07-09 18:38 Nathan Bossart <nathan@postgresql.org>
  0 siblings, 0 replies; 440+ messages in thread

From: Nathan Bossart @ 2026-07-09 18:38 UTC (permalink / raw)

---
 src/backend/executor/nodeBitmapHeapscan.c | 21 ++++++---------------
 1 file changed, 6 insertions(+), 15 deletions(-)

diff --git a/src/backend/executor/nodeBitmapHeapscan.c b/src/backend/executor/nodeBitmapHeapscan.c
index 83d6478bc2b..f2bb487bf10 100644
--- a/src/backend/executor/nodeBitmapHeapscan.c
+++ b/src/backend/executor/nodeBitmapHeapscan.c
@@ -79,7 +79,6 @@ typedef enum
 /* ----------------
  *	 ParallelBitmapHeapState information
  *		tbmiterator				iterator for scanning current pages
- *		mutex					mutual exclusion for state
  *		state					current state of the TIDBitmap
  *		cv						conditional wait variable
  * ----------------
@@ -87,8 +86,7 @@ typedef enum
 typedef struct ParallelBitmapHeapState
 {
 	dsa_pointer tbmiterator;
-	slock_t		mutex;
-	SharedBitmapState state;
+	pg_atomic_uint32 state;
 	ConditionVariable cv;
 } ParallelBitmapHeapState;
 
@@ -228,9 +226,7 @@ BitmapHeapNext(BitmapHeapScanState *node)
 static inline void
 BitmapDoneInitializingSharedState(ParallelBitmapHeapState *pstate)
 {
-	SpinLockAcquire(&pstate->mutex);
-	pstate->state = BM_FINISHED;
-	SpinLockRelease(&pstate->mutex);
+	pg_atomic_write_membarrier_u32(&pstate->state, BM_FINISHED);
 	ConditionVariableBroadcast(&pstate->cv);
 }
 
@@ -480,11 +476,8 @@ BitmapShouldInitializeSharedState(ParallelBitmapHeapState *pstate)
 
 	while (1)
 	{
-		SpinLockAcquire(&pstate->mutex);
-		state = pstate->state;
-		if (pstate->state == BM_INITIAL)
-			pstate->state = BM_INPROGRESS;
-		SpinLockRelease(&pstate->mutex);
+		state = BM_INITIAL;
+		pg_atomic_compare_exchange_u32(&pstate->state, &state, BM_INPROGRESS);
 
 		/* Exit if bitmap is done, or if we're the leader. */
 		if (state != BM_INPROGRESS)
@@ -538,9 +531,7 @@ ExecBitmapHeapInitializeDSM(BitmapHeapScanState *node,
 
 	pstate->tbmiterator = 0;
 
-	/* Initialize the mutex */
-	SpinLockInit(&pstate->mutex);
-	pstate->state = BM_INITIAL;
+	pg_atomic_init_u32(&pstate->state, BM_INITIAL);
 
 	ConditionVariableInit(&pstate->cv);
 
@@ -565,7 +556,7 @@ ExecBitmapHeapReInitializeDSM(BitmapHeapScanState *node,
 	if (dsa == NULL)
 		return;
 
-	pstate->state = BM_INITIAL;
+	pg_atomic_write_u32(&pstate->state, BM_INITIAL);
 
 	if (DsaPointerIsValid(pstate->tbmiterator))
 		tbm_free_shared_area(dsa, pstate->tbmiterator);
-- 
2.50.1 (Apple Git-155)


--Ot5x3ffkWEuxilWO
Content-Type: text/plain; charset=us-ascii
Content-Disposition: attachment;
	filename=v1-0003-convert-FixedParallelState-last_xlog_end-to-an-at.patch



^ permalink  raw  reply  [nested|flat] 440+ messages in thread

* [PATCH v1 2/8] convert ParallelBitmapHeapState->state to an atomic
@ 2026-07-09 18:38 Nathan Bossart <nathan@postgresql.org>
  0 siblings, 0 replies; 440+ messages in thread

From: Nathan Bossart @ 2026-07-09 18:38 UTC (permalink / raw)

---
 src/backend/executor/nodeBitmapHeapscan.c | 21 ++++++---------------
 1 file changed, 6 insertions(+), 15 deletions(-)

diff --git a/src/backend/executor/nodeBitmapHeapscan.c b/src/backend/executor/nodeBitmapHeapscan.c
index 83d6478bc2b..f2bb487bf10 100644
--- a/src/backend/executor/nodeBitmapHeapscan.c
+++ b/src/backend/executor/nodeBitmapHeapscan.c
@@ -79,7 +79,6 @@ typedef enum
 /* ----------------
  *	 ParallelBitmapHeapState information
  *		tbmiterator				iterator for scanning current pages
- *		mutex					mutual exclusion for state
  *		state					current state of the TIDBitmap
  *		cv						conditional wait variable
  * ----------------
@@ -87,8 +86,7 @@ typedef enum
 typedef struct ParallelBitmapHeapState
 {
 	dsa_pointer tbmiterator;
-	slock_t		mutex;
-	SharedBitmapState state;
+	pg_atomic_uint32 state;
 	ConditionVariable cv;
 } ParallelBitmapHeapState;
 
@@ -228,9 +226,7 @@ BitmapHeapNext(BitmapHeapScanState *node)
 static inline void
 BitmapDoneInitializingSharedState(ParallelBitmapHeapState *pstate)
 {
-	SpinLockAcquire(&pstate->mutex);
-	pstate->state = BM_FINISHED;
-	SpinLockRelease(&pstate->mutex);
+	pg_atomic_write_membarrier_u32(&pstate->state, BM_FINISHED);
 	ConditionVariableBroadcast(&pstate->cv);
 }
 
@@ -480,11 +476,8 @@ BitmapShouldInitializeSharedState(ParallelBitmapHeapState *pstate)
 
 	while (1)
 	{
-		SpinLockAcquire(&pstate->mutex);
-		state = pstate->state;
-		if (pstate->state == BM_INITIAL)
-			pstate->state = BM_INPROGRESS;
-		SpinLockRelease(&pstate->mutex);
+		state = BM_INITIAL;
+		pg_atomic_compare_exchange_u32(&pstate->state, &state, BM_INPROGRESS);
 
 		/* Exit if bitmap is done, or if we're the leader. */
 		if (state != BM_INPROGRESS)
@@ -538,9 +531,7 @@ ExecBitmapHeapInitializeDSM(BitmapHeapScanState *node,
 
 	pstate->tbmiterator = 0;
 
-	/* Initialize the mutex */
-	SpinLockInit(&pstate->mutex);
-	pstate->state = BM_INITIAL;
+	pg_atomic_init_u32(&pstate->state, BM_INITIAL);
 
 	ConditionVariableInit(&pstate->cv);
 
@@ -565,7 +556,7 @@ ExecBitmapHeapReInitializeDSM(BitmapHeapScanState *node,
 	if (dsa == NULL)
 		return;
 
-	pstate->state = BM_INITIAL;
+	pg_atomic_write_u32(&pstate->state, BM_INITIAL);
 
 	if (DsaPointerIsValid(pstate->tbmiterator))
 		tbm_free_shared_area(dsa, pstate->tbmiterator);
-- 
2.50.1 (Apple Git-155)


--Ot5x3ffkWEuxilWO
Content-Type: text/plain; charset=us-ascii
Content-Disposition: attachment;
	filename=v1-0003-convert-FixedParallelState-last_xlog_end-to-an-at.patch



^ permalink  raw  reply  [nested|flat] 440+ messages in thread

* [PATCH v2 2/9] convert ParallelBitmapHeapState->state to an atomic
@ 2026-07-09 18:38 Nathan Bossart <nathan@postgresql.org>
  0 siblings, 0 replies; 440+ messages in thread

From: Nathan Bossart @ 2026-07-09 18:38 UTC (permalink / raw)

---
 src/backend/executor/nodeBitmapHeapscan.c | 23 +++++++----------------
 1 file changed, 7 insertions(+), 16 deletions(-)

diff --git a/src/backend/executor/nodeBitmapHeapscan.c b/src/backend/executor/nodeBitmapHeapscan.c
index 83d6478bc2b..a9e83f30687 100644
--- a/src/backend/executor/nodeBitmapHeapscan.c
+++ b/src/backend/executor/nodeBitmapHeapscan.c
@@ -79,7 +79,6 @@ typedef enum
 /* ----------------
  *	 ParallelBitmapHeapState information
  *		tbmiterator				iterator for scanning current pages
- *		mutex					mutual exclusion for state
  *		state					current state of the TIDBitmap
  *		cv						conditional wait variable
  * ----------------
@@ -87,8 +86,7 @@ typedef enum
 typedef struct ParallelBitmapHeapState
 {
 	dsa_pointer tbmiterator;
-	slock_t		mutex;
-	SharedBitmapState state;
+	pg_atomic_uint32 state;
 	ConditionVariable cv;
 } ParallelBitmapHeapState;
 
@@ -228,9 +226,7 @@ BitmapHeapNext(BitmapHeapScanState *node)
 static inline void
 BitmapDoneInitializingSharedState(ParallelBitmapHeapState *pstate)
 {
-	SpinLockAcquire(&pstate->mutex);
-	pstate->state = BM_FINISHED;
-	SpinLockRelease(&pstate->mutex);
+	pg_atomic_write_membarrier_u32(&pstate->state, BM_FINISHED);
 	ConditionVariableBroadcast(&pstate->cv);
 }
 
@@ -476,15 +472,12 @@ ExecInitBitmapHeapScan(BitmapHeapScan *node, EState *estate, int eflags)
 static bool
 BitmapShouldInitializeSharedState(ParallelBitmapHeapState *pstate)
 {
-	SharedBitmapState state;
+	uint32		state;
 
 	while (1)
 	{
-		SpinLockAcquire(&pstate->mutex);
-		state = pstate->state;
-		if (pstate->state == BM_INITIAL)
-			pstate->state = BM_INPROGRESS;
-		SpinLockRelease(&pstate->mutex);
+		state = BM_INITIAL;
+		pg_atomic_compare_exchange_u32(&pstate->state, &state, BM_INPROGRESS);
 
 		/* Exit if bitmap is done, or if we're the leader. */
 		if (state != BM_INPROGRESS)
@@ -538,9 +531,7 @@ ExecBitmapHeapInitializeDSM(BitmapHeapScanState *node,
 
 	pstate->tbmiterator = 0;
 
-	/* Initialize the mutex */
-	SpinLockInit(&pstate->mutex);
-	pstate->state = BM_INITIAL;
+	pg_atomic_init_u32(&pstate->state, BM_INITIAL);
 
 	ConditionVariableInit(&pstate->cv);
 
@@ -565,7 +556,7 @@ ExecBitmapHeapReInitializeDSM(BitmapHeapScanState *node,
 	if (dsa == NULL)
 		return;
 
-	pstate->state = BM_INITIAL;
+	pg_atomic_write_u32(&pstate->state, BM_INITIAL);
 
 	if (DsaPointerIsValid(pstate->tbmiterator))
 		tbm_free_shared_area(dsa, pstate->tbmiterator);
-- 
2.50.1 (Apple Git-155)


--Xf36GNcW+0xZNily
Content-Type: text/plain; charset=us-ascii
Content-Disposition: attachment;
	filename=v2-0003-convert-FixedParallelState-last_xlog_end-to-an-at.patch



^ permalink  raw  reply  [nested|flat] 440+ messages in thread

* [PATCH v2 2/9] convert ParallelBitmapHeapState->state to an atomic
@ 2026-07-09 18:38 Nathan Bossart <nathan@postgresql.org>
  0 siblings, 0 replies; 440+ messages in thread

From: Nathan Bossart @ 2026-07-09 18:38 UTC (permalink / raw)

---
 src/backend/executor/nodeBitmapHeapscan.c | 23 +++++++----------------
 1 file changed, 7 insertions(+), 16 deletions(-)

diff --git a/src/backend/executor/nodeBitmapHeapscan.c b/src/backend/executor/nodeBitmapHeapscan.c
index 83d6478bc2b..a9e83f30687 100644
--- a/src/backend/executor/nodeBitmapHeapscan.c
+++ b/src/backend/executor/nodeBitmapHeapscan.c
@@ -79,7 +79,6 @@ typedef enum
 /* ----------------
  *	 ParallelBitmapHeapState information
  *		tbmiterator				iterator for scanning current pages
- *		mutex					mutual exclusion for state
  *		state					current state of the TIDBitmap
  *		cv						conditional wait variable
  * ----------------
@@ -87,8 +86,7 @@ typedef enum
 typedef struct ParallelBitmapHeapState
 {
 	dsa_pointer tbmiterator;
-	slock_t		mutex;
-	SharedBitmapState state;
+	pg_atomic_uint32 state;
 	ConditionVariable cv;
 } ParallelBitmapHeapState;
 
@@ -228,9 +226,7 @@ BitmapHeapNext(BitmapHeapScanState *node)
 static inline void
 BitmapDoneInitializingSharedState(ParallelBitmapHeapState *pstate)
 {
-	SpinLockAcquire(&pstate->mutex);
-	pstate->state = BM_FINISHED;
-	SpinLockRelease(&pstate->mutex);
+	pg_atomic_write_membarrier_u32(&pstate->state, BM_FINISHED);
 	ConditionVariableBroadcast(&pstate->cv);
 }
 
@@ -476,15 +472,12 @@ ExecInitBitmapHeapScan(BitmapHeapScan *node, EState *estate, int eflags)
 static bool
 BitmapShouldInitializeSharedState(ParallelBitmapHeapState *pstate)
 {
-	SharedBitmapState state;
+	uint32		state;
 
 	while (1)
 	{
-		SpinLockAcquire(&pstate->mutex);
-		state = pstate->state;
-		if (pstate->state == BM_INITIAL)
-			pstate->state = BM_INPROGRESS;
-		SpinLockRelease(&pstate->mutex);
+		state = BM_INITIAL;
+		pg_atomic_compare_exchange_u32(&pstate->state, &state, BM_INPROGRESS);
 
 		/* Exit if bitmap is done, or if we're the leader. */
 		if (state != BM_INPROGRESS)
@@ -538,9 +531,7 @@ ExecBitmapHeapInitializeDSM(BitmapHeapScanState *node,
 
 	pstate->tbmiterator = 0;
 
-	/* Initialize the mutex */
-	SpinLockInit(&pstate->mutex);
-	pstate->state = BM_INITIAL;
+	pg_atomic_init_u32(&pstate->state, BM_INITIAL);
 
 	ConditionVariableInit(&pstate->cv);
 
@@ -565,7 +556,7 @@ ExecBitmapHeapReInitializeDSM(BitmapHeapScanState *node,
 	if (dsa == NULL)
 		return;
 
-	pstate->state = BM_INITIAL;
+	pg_atomic_write_u32(&pstate->state, BM_INITIAL);
 
 	if (DsaPointerIsValid(pstate->tbmiterator))
 		tbm_free_shared_area(dsa, pstate->tbmiterator);
-- 
2.50.1 (Apple Git-155)


--Xf36GNcW+0xZNily
Content-Type: text/plain; charset=us-ascii
Content-Disposition: attachment;
	filename=v2-0003-convert-FixedParallelState-last_xlog_end-to-an-at.patch



^ permalink  raw  reply  [nested|flat] 440+ messages in thread

* [PATCH v1 2/8] convert ParallelBitmapHeapState->state to an atomic
@ 2026-07-09 18:38 Nathan Bossart <nathan@postgresql.org>
  0 siblings, 0 replies; 440+ messages in thread

From: Nathan Bossart @ 2026-07-09 18:38 UTC (permalink / raw)

---
 src/backend/executor/nodeBitmapHeapscan.c | 21 ++++++---------------
 1 file changed, 6 insertions(+), 15 deletions(-)

diff --git a/src/backend/executor/nodeBitmapHeapscan.c b/src/backend/executor/nodeBitmapHeapscan.c
index 83d6478bc2b..f2bb487bf10 100644
--- a/src/backend/executor/nodeBitmapHeapscan.c
+++ b/src/backend/executor/nodeBitmapHeapscan.c
@@ -79,7 +79,6 @@ typedef enum
 /* ----------------
  *	 ParallelBitmapHeapState information
  *		tbmiterator				iterator for scanning current pages
- *		mutex					mutual exclusion for state
  *		state					current state of the TIDBitmap
  *		cv						conditional wait variable
  * ----------------
@@ -87,8 +86,7 @@ typedef enum
 typedef struct ParallelBitmapHeapState
 {
 	dsa_pointer tbmiterator;
-	slock_t		mutex;
-	SharedBitmapState state;
+	pg_atomic_uint32 state;
 	ConditionVariable cv;
 } ParallelBitmapHeapState;
 
@@ -228,9 +226,7 @@ BitmapHeapNext(BitmapHeapScanState *node)
 static inline void
 BitmapDoneInitializingSharedState(ParallelBitmapHeapState *pstate)
 {
-	SpinLockAcquire(&pstate->mutex);
-	pstate->state = BM_FINISHED;
-	SpinLockRelease(&pstate->mutex);
+	pg_atomic_write_membarrier_u32(&pstate->state, BM_FINISHED);
 	ConditionVariableBroadcast(&pstate->cv);
 }
 
@@ -480,11 +476,8 @@ BitmapShouldInitializeSharedState(ParallelBitmapHeapState *pstate)
 
 	while (1)
 	{
-		SpinLockAcquire(&pstate->mutex);
-		state = pstate->state;
-		if (pstate->state == BM_INITIAL)
-			pstate->state = BM_INPROGRESS;
-		SpinLockRelease(&pstate->mutex);
+		state = BM_INITIAL;
+		pg_atomic_compare_exchange_u32(&pstate->state, &state, BM_INPROGRESS);
 
 		/* Exit if bitmap is done, or if we're the leader. */
 		if (state != BM_INPROGRESS)
@@ -538,9 +531,7 @@ ExecBitmapHeapInitializeDSM(BitmapHeapScanState *node,
 
 	pstate->tbmiterator = 0;
 
-	/* Initialize the mutex */
-	SpinLockInit(&pstate->mutex);
-	pstate->state = BM_INITIAL;
+	pg_atomic_init_u32(&pstate->state, BM_INITIAL);
 
 	ConditionVariableInit(&pstate->cv);
 
@@ -565,7 +556,7 @@ ExecBitmapHeapReInitializeDSM(BitmapHeapScanState *node,
 	if (dsa == NULL)
 		return;
 
-	pstate->state = BM_INITIAL;
+	pg_atomic_write_u32(&pstate->state, BM_INITIAL);
 
 	if (DsaPointerIsValid(pstate->tbmiterator))
 		tbm_free_shared_area(dsa, pstate->tbmiterator);
-- 
2.50.1 (Apple Git-155)


--Ot5x3ffkWEuxilWO
Content-Type: text/plain; charset=us-ascii
Content-Disposition: attachment;
	filename=v1-0003-convert-FixedParallelState-last_xlog_end-to-an-at.patch



^ permalink  raw  reply  [nested|flat] 440+ messages in thread

* [PATCH v1 2/8] convert ParallelBitmapHeapState->state to an atomic
@ 2026-07-09 18:38 Nathan Bossart <nathan@postgresql.org>
  0 siblings, 0 replies; 440+ messages in thread

From: Nathan Bossart @ 2026-07-09 18:38 UTC (permalink / raw)

---
 src/backend/executor/nodeBitmapHeapscan.c | 21 ++++++---------------
 1 file changed, 6 insertions(+), 15 deletions(-)

diff --git a/src/backend/executor/nodeBitmapHeapscan.c b/src/backend/executor/nodeBitmapHeapscan.c
index 83d6478bc2b..f2bb487bf10 100644
--- a/src/backend/executor/nodeBitmapHeapscan.c
+++ b/src/backend/executor/nodeBitmapHeapscan.c
@@ -79,7 +79,6 @@ typedef enum
 /* ----------------
  *	 ParallelBitmapHeapState information
  *		tbmiterator				iterator for scanning current pages
- *		mutex					mutual exclusion for state
  *		state					current state of the TIDBitmap
  *		cv						conditional wait variable
  * ----------------
@@ -87,8 +86,7 @@ typedef enum
 typedef struct ParallelBitmapHeapState
 {
 	dsa_pointer tbmiterator;
-	slock_t		mutex;
-	SharedBitmapState state;
+	pg_atomic_uint32 state;
 	ConditionVariable cv;
 } ParallelBitmapHeapState;
 
@@ -228,9 +226,7 @@ BitmapHeapNext(BitmapHeapScanState *node)
 static inline void
 BitmapDoneInitializingSharedState(ParallelBitmapHeapState *pstate)
 {
-	SpinLockAcquire(&pstate->mutex);
-	pstate->state = BM_FINISHED;
-	SpinLockRelease(&pstate->mutex);
+	pg_atomic_write_membarrier_u32(&pstate->state, BM_FINISHED);
 	ConditionVariableBroadcast(&pstate->cv);
 }
 
@@ -480,11 +476,8 @@ BitmapShouldInitializeSharedState(ParallelBitmapHeapState *pstate)
 
 	while (1)
 	{
-		SpinLockAcquire(&pstate->mutex);
-		state = pstate->state;
-		if (pstate->state == BM_INITIAL)
-			pstate->state = BM_INPROGRESS;
-		SpinLockRelease(&pstate->mutex);
+		state = BM_INITIAL;
+		pg_atomic_compare_exchange_u32(&pstate->state, &state, BM_INPROGRESS);
 
 		/* Exit if bitmap is done, or if we're the leader. */
 		if (state != BM_INPROGRESS)
@@ -538,9 +531,7 @@ ExecBitmapHeapInitializeDSM(BitmapHeapScanState *node,
 
 	pstate->tbmiterator = 0;
 
-	/* Initialize the mutex */
-	SpinLockInit(&pstate->mutex);
-	pstate->state = BM_INITIAL;
+	pg_atomic_init_u32(&pstate->state, BM_INITIAL);
 
 	ConditionVariableInit(&pstate->cv);
 
@@ -565,7 +556,7 @@ ExecBitmapHeapReInitializeDSM(BitmapHeapScanState *node,
 	if (dsa == NULL)
 		return;
 
-	pstate->state = BM_INITIAL;
+	pg_atomic_write_u32(&pstate->state, BM_INITIAL);
 
 	if (DsaPointerIsValid(pstate->tbmiterator))
 		tbm_free_shared_area(dsa, pstate->tbmiterator);
-- 
2.50.1 (Apple Git-155)


--Ot5x3ffkWEuxilWO
Content-Type: text/plain; charset=us-ascii
Content-Disposition: attachment;
	filename=v1-0003-convert-FixedParallelState-last_xlog_end-to-an-at.patch



^ permalink  raw  reply  [nested|flat] 440+ messages in thread

* [PATCH v1 2/8] convert ParallelBitmapHeapState->state to an atomic
@ 2026-07-09 18:38 Nathan Bossart <nathan@postgresql.org>
  0 siblings, 0 replies; 440+ messages in thread

From: Nathan Bossart @ 2026-07-09 18:38 UTC (permalink / raw)

---
 src/backend/executor/nodeBitmapHeapscan.c | 21 ++++++---------------
 1 file changed, 6 insertions(+), 15 deletions(-)

diff --git a/src/backend/executor/nodeBitmapHeapscan.c b/src/backend/executor/nodeBitmapHeapscan.c
index 83d6478bc2b..f2bb487bf10 100644
--- a/src/backend/executor/nodeBitmapHeapscan.c
+++ b/src/backend/executor/nodeBitmapHeapscan.c
@@ -79,7 +79,6 @@ typedef enum
 /* ----------------
  *	 ParallelBitmapHeapState information
  *		tbmiterator				iterator for scanning current pages
- *		mutex					mutual exclusion for state
  *		state					current state of the TIDBitmap
  *		cv						conditional wait variable
  * ----------------
@@ -87,8 +86,7 @@ typedef enum
 typedef struct ParallelBitmapHeapState
 {
 	dsa_pointer tbmiterator;
-	slock_t		mutex;
-	SharedBitmapState state;
+	pg_atomic_uint32 state;
 	ConditionVariable cv;
 } ParallelBitmapHeapState;
 
@@ -228,9 +226,7 @@ BitmapHeapNext(BitmapHeapScanState *node)
 static inline void
 BitmapDoneInitializingSharedState(ParallelBitmapHeapState *pstate)
 {
-	SpinLockAcquire(&pstate->mutex);
-	pstate->state = BM_FINISHED;
-	SpinLockRelease(&pstate->mutex);
+	pg_atomic_write_membarrier_u32(&pstate->state, BM_FINISHED);
 	ConditionVariableBroadcast(&pstate->cv);
 }
 
@@ -480,11 +476,8 @@ BitmapShouldInitializeSharedState(ParallelBitmapHeapState *pstate)
 
 	while (1)
 	{
-		SpinLockAcquire(&pstate->mutex);
-		state = pstate->state;
-		if (pstate->state == BM_INITIAL)
-			pstate->state = BM_INPROGRESS;
-		SpinLockRelease(&pstate->mutex);
+		state = BM_INITIAL;
+		pg_atomic_compare_exchange_u32(&pstate->state, &state, BM_INPROGRESS);
 
 		/* Exit if bitmap is done, or if we're the leader. */
 		if (state != BM_INPROGRESS)
@@ -538,9 +531,7 @@ ExecBitmapHeapInitializeDSM(BitmapHeapScanState *node,
 
 	pstate->tbmiterator = 0;
 
-	/* Initialize the mutex */
-	SpinLockInit(&pstate->mutex);
-	pstate->state = BM_INITIAL;
+	pg_atomic_init_u32(&pstate->state, BM_INITIAL);
 
 	ConditionVariableInit(&pstate->cv);
 
@@ -565,7 +556,7 @@ ExecBitmapHeapReInitializeDSM(BitmapHeapScanState *node,
 	if (dsa == NULL)
 		return;
 
-	pstate->state = BM_INITIAL;
+	pg_atomic_write_u32(&pstate->state, BM_INITIAL);
 
 	if (DsaPointerIsValid(pstate->tbmiterator))
 		tbm_free_shared_area(dsa, pstate->tbmiterator);
-- 
2.50.1 (Apple Git-155)


--Ot5x3ffkWEuxilWO
Content-Type: text/plain; charset=us-ascii
Content-Disposition: attachment;
	filename=v1-0003-convert-FixedParallelState-last_xlog_end-to-an-at.patch



^ permalink  raw  reply  [nested|flat] 440+ messages in thread

* [PATCH v2 2/9] convert ParallelBitmapHeapState->state to an atomic
@ 2026-07-09 18:38 Nathan Bossart <nathan@postgresql.org>
  0 siblings, 0 replies; 440+ messages in thread

From: Nathan Bossart @ 2026-07-09 18:38 UTC (permalink / raw)

---
 src/backend/executor/nodeBitmapHeapscan.c | 23 +++++++----------------
 1 file changed, 7 insertions(+), 16 deletions(-)

diff --git a/src/backend/executor/nodeBitmapHeapscan.c b/src/backend/executor/nodeBitmapHeapscan.c
index 83d6478bc2b..a9e83f30687 100644
--- a/src/backend/executor/nodeBitmapHeapscan.c
+++ b/src/backend/executor/nodeBitmapHeapscan.c
@@ -79,7 +79,6 @@ typedef enum
 /* ----------------
  *	 ParallelBitmapHeapState information
  *		tbmiterator				iterator for scanning current pages
- *		mutex					mutual exclusion for state
  *		state					current state of the TIDBitmap
  *		cv						conditional wait variable
  * ----------------
@@ -87,8 +86,7 @@ typedef enum
 typedef struct ParallelBitmapHeapState
 {
 	dsa_pointer tbmiterator;
-	slock_t		mutex;
-	SharedBitmapState state;
+	pg_atomic_uint32 state;
 	ConditionVariable cv;
 } ParallelBitmapHeapState;
 
@@ -228,9 +226,7 @@ BitmapHeapNext(BitmapHeapScanState *node)
 static inline void
 BitmapDoneInitializingSharedState(ParallelBitmapHeapState *pstate)
 {
-	SpinLockAcquire(&pstate->mutex);
-	pstate->state = BM_FINISHED;
-	SpinLockRelease(&pstate->mutex);
+	pg_atomic_write_membarrier_u32(&pstate->state, BM_FINISHED);
 	ConditionVariableBroadcast(&pstate->cv);
 }
 
@@ -476,15 +472,12 @@ ExecInitBitmapHeapScan(BitmapHeapScan *node, EState *estate, int eflags)
 static bool
 BitmapShouldInitializeSharedState(ParallelBitmapHeapState *pstate)
 {
-	SharedBitmapState state;
+	uint32		state;
 
 	while (1)
 	{
-		SpinLockAcquire(&pstate->mutex);
-		state = pstate->state;
-		if (pstate->state == BM_INITIAL)
-			pstate->state = BM_INPROGRESS;
-		SpinLockRelease(&pstate->mutex);
+		state = BM_INITIAL;
+		pg_atomic_compare_exchange_u32(&pstate->state, &state, BM_INPROGRESS);
 
 		/* Exit if bitmap is done, or if we're the leader. */
 		if (state != BM_INPROGRESS)
@@ -538,9 +531,7 @@ ExecBitmapHeapInitializeDSM(BitmapHeapScanState *node,
 
 	pstate->tbmiterator = 0;
 
-	/* Initialize the mutex */
-	SpinLockInit(&pstate->mutex);
-	pstate->state = BM_INITIAL;
+	pg_atomic_init_u32(&pstate->state, BM_INITIAL);
 
 	ConditionVariableInit(&pstate->cv);
 
@@ -565,7 +556,7 @@ ExecBitmapHeapReInitializeDSM(BitmapHeapScanState *node,
 	if (dsa == NULL)
 		return;
 
-	pstate->state = BM_INITIAL;
+	pg_atomic_write_u32(&pstate->state, BM_INITIAL);
 
 	if (DsaPointerIsValid(pstate->tbmiterator))
 		tbm_free_shared_area(dsa, pstate->tbmiterator);
-- 
2.50.1 (Apple Git-155)


--Xf36GNcW+0xZNily
Content-Type: text/plain; charset=us-ascii
Content-Disposition: attachment;
	filename=v2-0003-convert-FixedParallelState-last_xlog_end-to-an-at.patch



^ permalink  raw  reply  [nested|flat] 440+ messages in thread

* [PATCH v1 2/8] convert ParallelBitmapHeapState->state to an atomic
@ 2026-07-09 18:38 Nathan Bossart <nathan@postgresql.org>
  0 siblings, 0 replies; 440+ messages in thread

From: Nathan Bossart @ 2026-07-09 18:38 UTC (permalink / raw)

---
 src/backend/executor/nodeBitmapHeapscan.c | 21 ++++++---------------
 1 file changed, 6 insertions(+), 15 deletions(-)

diff --git a/src/backend/executor/nodeBitmapHeapscan.c b/src/backend/executor/nodeBitmapHeapscan.c
index 83d6478bc2b..f2bb487bf10 100644
--- a/src/backend/executor/nodeBitmapHeapscan.c
+++ b/src/backend/executor/nodeBitmapHeapscan.c
@@ -79,7 +79,6 @@ typedef enum
 /* ----------------
  *	 ParallelBitmapHeapState information
  *		tbmiterator				iterator for scanning current pages
- *		mutex					mutual exclusion for state
  *		state					current state of the TIDBitmap
  *		cv						conditional wait variable
  * ----------------
@@ -87,8 +86,7 @@ typedef enum
 typedef struct ParallelBitmapHeapState
 {
 	dsa_pointer tbmiterator;
-	slock_t		mutex;
-	SharedBitmapState state;
+	pg_atomic_uint32 state;
 	ConditionVariable cv;
 } ParallelBitmapHeapState;
 
@@ -228,9 +226,7 @@ BitmapHeapNext(BitmapHeapScanState *node)
 static inline void
 BitmapDoneInitializingSharedState(ParallelBitmapHeapState *pstate)
 {
-	SpinLockAcquire(&pstate->mutex);
-	pstate->state = BM_FINISHED;
-	SpinLockRelease(&pstate->mutex);
+	pg_atomic_write_membarrier_u32(&pstate->state, BM_FINISHED);
 	ConditionVariableBroadcast(&pstate->cv);
 }
 
@@ -480,11 +476,8 @@ BitmapShouldInitializeSharedState(ParallelBitmapHeapState *pstate)
 
 	while (1)
 	{
-		SpinLockAcquire(&pstate->mutex);
-		state = pstate->state;
-		if (pstate->state == BM_INITIAL)
-			pstate->state = BM_INPROGRESS;
-		SpinLockRelease(&pstate->mutex);
+		state = BM_INITIAL;
+		pg_atomic_compare_exchange_u32(&pstate->state, &state, BM_INPROGRESS);
 
 		/* Exit if bitmap is done, or if we're the leader. */
 		if (state != BM_INPROGRESS)
@@ -538,9 +531,7 @@ ExecBitmapHeapInitializeDSM(BitmapHeapScanState *node,
 
 	pstate->tbmiterator = 0;
 
-	/* Initialize the mutex */
-	SpinLockInit(&pstate->mutex);
-	pstate->state = BM_INITIAL;
+	pg_atomic_init_u32(&pstate->state, BM_INITIAL);
 
 	ConditionVariableInit(&pstate->cv);
 
@@ -565,7 +556,7 @@ ExecBitmapHeapReInitializeDSM(BitmapHeapScanState *node,
 	if (dsa == NULL)
 		return;
 
-	pstate->state = BM_INITIAL;
+	pg_atomic_write_u32(&pstate->state, BM_INITIAL);
 
 	if (DsaPointerIsValid(pstate->tbmiterator))
 		tbm_free_shared_area(dsa, pstate->tbmiterator);
-- 
2.50.1 (Apple Git-155)


--Ot5x3ffkWEuxilWO
Content-Type: text/plain; charset=us-ascii
Content-Disposition: attachment;
	filename=v1-0003-convert-FixedParallelState-last_xlog_end-to-an-at.patch



^ permalink  raw  reply  [nested|flat] 440+ messages in thread

* [PATCH v2 2/9] convert ParallelBitmapHeapState->state to an atomic
@ 2026-07-09 18:38 Nathan Bossart <nathan@postgresql.org>
  0 siblings, 0 replies; 440+ messages in thread

From: Nathan Bossart @ 2026-07-09 18:38 UTC (permalink / raw)

---
 src/backend/executor/nodeBitmapHeapscan.c | 23 +++++++----------------
 1 file changed, 7 insertions(+), 16 deletions(-)

diff --git a/src/backend/executor/nodeBitmapHeapscan.c b/src/backend/executor/nodeBitmapHeapscan.c
index 83d6478bc2b..a9e83f30687 100644
--- a/src/backend/executor/nodeBitmapHeapscan.c
+++ b/src/backend/executor/nodeBitmapHeapscan.c
@@ -79,7 +79,6 @@ typedef enum
 /* ----------------
  *	 ParallelBitmapHeapState information
  *		tbmiterator				iterator for scanning current pages
- *		mutex					mutual exclusion for state
  *		state					current state of the TIDBitmap
  *		cv						conditional wait variable
  * ----------------
@@ -87,8 +86,7 @@ typedef enum
 typedef struct ParallelBitmapHeapState
 {
 	dsa_pointer tbmiterator;
-	slock_t		mutex;
-	SharedBitmapState state;
+	pg_atomic_uint32 state;
 	ConditionVariable cv;
 } ParallelBitmapHeapState;
 
@@ -228,9 +226,7 @@ BitmapHeapNext(BitmapHeapScanState *node)
 static inline void
 BitmapDoneInitializingSharedState(ParallelBitmapHeapState *pstate)
 {
-	SpinLockAcquire(&pstate->mutex);
-	pstate->state = BM_FINISHED;
-	SpinLockRelease(&pstate->mutex);
+	pg_atomic_write_membarrier_u32(&pstate->state, BM_FINISHED);
 	ConditionVariableBroadcast(&pstate->cv);
 }
 
@@ -476,15 +472,12 @@ ExecInitBitmapHeapScan(BitmapHeapScan *node, EState *estate, int eflags)
 static bool
 BitmapShouldInitializeSharedState(ParallelBitmapHeapState *pstate)
 {
-	SharedBitmapState state;
+	uint32		state;
 
 	while (1)
 	{
-		SpinLockAcquire(&pstate->mutex);
-		state = pstate->state;
-		if (pstate->state == BM_INITIAL)
-			pstate->state = BM_INPROGRESS;
-		SpinLockRelease(&pstate->mutex);
+		state = BM_INITIAL;
+		pg_atomic_compare_exchange_u32(&pstate->state, &state, BM_INPROGRESS);
 
 		/* Exit if bitmap is done, or if we're the leader. */
 		if (state != BM_INPROGRESS)
@@ -538,9 +531,7 @@ ExecBitmapHeapInitializeDSM(BitmapHeapScanState *node,
 
 	pstate->tbmiterator = 0;
 
-	/* Initialize the mutex */
-	SpinLockInit(&pstate->mutex);
-	pstate->state = BM_INITIAL;
+	pg_atomic_init_u32(&pstate->state, BM_INITIAL);
 
 	ConditionVariableInit(&pstate->cv);
 
@@ -565,7 +556,7 @@ ExecBitmapHeapReInitializeDSM(BitmapHeapScanState *node,
 	if (dsa == NULL)
 		return;
 
-	pstate->state = BM_INITIAL;
+	pg_atomic_write_u32(&pstate->state, BM_INITIAL);
 
 	if (DsaPointerIsValid(pstate->tbmiterator))
 		tbm_free_shared_area(dsa, pstate->tbmiterator);
-- 
2.50.1 (Apple Git-155)


--Xf36GNcW+0xZNily
Content-Type: text/plain; charset=us-ascii
Content-Disposition: attachment;
	filename=v2-0003-convert-FixedParallelState-last_xlog_end-to-an-at.patch



^ permalink  raw  reply  [nested|flat] 440+ messages in thread

* [PATCH v1 2/8] convert ParallelBitmapHeapState->state to an atomic
@ 2026-07-09 18:38 Nathan Bossart <nathan@postgresql.org>
  0 siblings, 0 replies; 440+ messages in thread

From: Nathan Bossart @ 2026-07-09 18:38 UTC (permalink / raw)

---
 src/backend/executor/nodeBitmapHeapscan.c | 21 ++++++---------------
 1 file changed, 6 insertions(+), 15 deletions(-)

diff --git a/src/backend/executor/nodeBitmapHeapscan.c b/src/backend/executor/nodeBitmapHeapscan.c
index 83d6478bc2b..f2bb487bf10 100644
--- a/src/backend/executor/nodeBitmapHeapscan.c
+++ b/src/backend/executor/nodeBitmapHeapscan.c
@@ -79,7 +79,6 @@ typedef enum
 /* ----------------
  *	 ParallelBitmapHeapState information
  *		tbmiterator				iterator for scanning current pages
- *		mutex					mutual exclusion for state
  *		state					current state of the TIDBitmap
  *		cv						conditional wait variable
  * ----------------
@@ -87,8 +86,7 @@ typedef enum
 typedef struct ParallelBitmapHeapState
 {
 	dsa_pointer tbmiterator;
-	slock_t		mutex;
-	SharedBitmapState state;
+	pg_atomic_uint32 state;
 	ConditionVariable cv;
 } ParallelBitmapHeapState;
 
@@ -228,9 +226,7 @@ BitmapHeapNext(BitmapHeapScanState *node)
 static inline void
 BitmapDoneInitializingSharedState(ParallelBitmapHeapState *pstate)
 {
-	SpinLockAcquire(&pstate->mutex);
-	pstate->state = BM_FINISHED;
-	SpinLockRelease(&pstate->mutex);
+	pg_atomic_write_membarrier_u32(&pstate->state, BM_FINISHED);
 	ConditionVariableBroadcast(&pstate->cv);
 }
 
@@ -480,11 +476,8 @@ BitmapShouldInitializeSharedState(ParallelBitmapHeapState *pstate)
 
 	while (1)
 	{
-		SpinLockAcquire(&pstate->mutex);
-		state = pstate->state;
-		if (pstate->state == BM_INITIAL)
-			pstate->state = BM_INPROGRESS;
-		SpinLockRelease(&pstate->mutex);
+		state = BM_INITIAL;
+		pg_atomic_compare_exchange_u32(&pstate->state, &state, BM_INPROGRESS);
 
 		/* Exit if bitmap is done, or if we're the leader. */
 		if (state != BM_INPROGRESS)
@@ -538,9 +531,7 @@ ExecBitmapHeapInitializeDSM(BitmapHeapScanState *node,
 
 	pstate->tbmiterator = 0;
 
-	/* Initialize the mutex */
-	SpinLockInit(&pstate->mutex);
-	pstate->state = BM_INITIAL;
+	pg_atomic_init_u32(&pstate->state, BM_INITIAL);
 
 	ConditionVariableInit(&pstate->cv);
 
@@ -565,7 +556,7 @@ ExecBitmapHeapReInitializeDSM(BitmapHeapScanState *node,
 	if (dsa == NULL)
 		return;
 
-	pstate->state = BM_INITIAL;
+	pg_atomic_write_u32(&pstate->state, BM_INITIAL);
 
 	if (DsaPointerIsValid(pstate->tbmiterator))
 		tbm_free_shared_area(dsa, pstate->tbmiterator);
-- 
2.50.1 (Apple Git-155)


--Ot5x3ffkWEuxilWO
Content-Type: text/plain; charset=us-ascii
Content-Disposition: attachment;
	filename=v1-0003-convert-FixedParallelState-last_xlog_end-to-an-at.patch



^ permalink  raw  reply  [nested|flat] 440+ messages in thread

* [PATCH v2 2/9] convert ParallelBitmapHeapState->state to an atomic
@ 2026-07-09 18:38 Nathan Bossart <nathan@postgresql.org>
  0 siblings, 0 replies; 440+ messages in thread

From: Nathan Bossart @ 2026-07-09 18:38 UTC (permalink / raw)

---
 src/backend/executor/nodeBitmapHeapscan.c | 23 +++++++----------------
 1 file changed, 7 insertions(+), 16 deletions(-)

diff --git a/src/backend/executor/nodeBitmapHeapscan.c b/src/backend/executor/nodeBitmapHeapscan.c
index 83d6478bc2b..a9e83f30687 100644
--- a/src/backend/executor/nodeBitmapHeapscan.c
+++ b/src/backend/executor/nodeBitmapHeapscan.c
@@ -79,7 +79,6 @@ typedef enum
 /* ----------------
  *	 ParallelBitmapHeapState information
  *		tbmiterator				iterator for scanning current pages
- *		mutex					mutual exclusion for state
  *		state					current state of the TIDBitmap
  *		cv						conditional wait variable
  * ----------------
@@ -87,8 +86,7 @@ typedef enum
 typedef struct ParallelBitmapHeapState
 {
 	dsa_pointer tbmiterator;
-	slock_t		mutex;
-	SharedBitmapState state;
+	pg_atomic_uint32 state;
 	ConditionVariable cv;
 } ParallelBitmapHeapState;
 
@@ -228,9 +226,7 @@ BitmapHeapNext(BitmapHeapScanState *node)
 static inline void
 BitmapDoneInitializingSharedState(ParallelBitmapHeapState *pstate)
 {
-	SpinLockAcquire(&pstate->mutex);
-	pstate->state = BM_FINISHED;
-	SpinLockRelease(&pstate->mutex);
+	pg_atomic_write_membarrier_u32(&pstate->state, BM_FINISHED);
 	ConditionVariableBroadcast(&pstate->cv);
 }
 
@@ -476,15 +472,12 @@ ExecInitBitmapHeapScan(BitmapHeapScan *node, EState *estate, int eflags)
 static bool
 BitmapShouldInitializeSharedState(ParallelBitmapHeapState *pstate)
 {
-	SharedBitmapState state;
+	uint32		state;
 
 	while (1)
 	{
-		SpinLockAcquire(&pstate->mutex);
-		state = pstate->state;
-		if (pstate->state == BM_INITIAL)
-			pstate->state = BM_INPROGRESS;
-		SpinLockRelease(&pstate->mutex);
+		state = BM_INITIAL;
+		pg_atomic_compare_exchange_u32(&pstate->state, &state, BM_INPROGRESS);
 
 		/* Exit if bitmap is done, or if we're the leader. */
 		if (state != BM_INPROGRESS)
@@ -538,9 +531,7 @@ ExecBitmapHeapInitializeDSM(BitmapHeapScanState *node,
 
 	pstate->tbmiterator = 0;
 
-	/* Initialize the mutex */
-	SpinLockInit(&pstate->mutex);
-	pstate->state = BM_INITIAL;
+	pg_atomic_init_u32(&pstate->state, BM_INITIAL);
 
 	ConditionVariableInit(&pstate->cv);
 
@@ -565,7 +556,7 @@ ExecBitmapHeapReInitializeDSM(BitmapHeapScanState *node,
 	if (dsa == NULL)
 		return;
 
-	pstate->state = BM_INITIAL;
+	pg_atomic_write_u32(&pstate->state, BM_INITIAL);
 
 	if (DsaPointerIsValid(pstate->tbmiterator))
 		tbm_free_shared_area(dsa, pstate->tbmiterator);
-- 
2.50.1 (Apple Git-155)


--Xf36GNcW+0xZNily
Content-Type: text/plain; charset=us-ascii
Content-Disposition: attachment;
	filename=v2-0003-convert-FixedParallelState-last_xlog_end-to-an-at.patch



^ permalink  raw  reply  [nested|flat] 440+ messages in thread

* [PATCH v2 2/9] convert ParallelBitmapHeapState->state to an atomic
@ 2026-07-09 18:38 Nathan Bossart <nathan@postgresql.org>
  0 siblings, 0 replies; 440+ messages in thread

From: Nathan Bossart @ 2026-07-09 18:38 UTC (permalink / raw)

---
 src/backend/executor/nodeBitmapHeapscan.c | 23 +++++++----------------
 1 file changed, 7 insertions(+), 16 deletions(-)

diff --git a/src/backend/executor/nodeBitmapHeapscan.c b/src/backend/executor/nodeBitmapHeapscan.c
index 83d6478bc2b..a9e83f30687 100644
--- a/src/backend/executor/nodeBitmapHeapscan.c
+++ b/src/backend/executor/nodeBitmapHeapscan.c
@@ -79,7 +79,6 @@ typedef enum
 /* ----------------
  *	 ParallelBitmapHeapState information
  *		tbmiterator				iterator for scanning current pages
- *		mutex					mutual exclusion for state
  *		state					current state of the TIDBitmap
  *		cv						conditional wait variable
  * ----------------
@@ -87,8 +86,7 @@ typedef enum
 typedef struct ParallelBitmapHeapState
 {
 	dsa_pointer tbmiterator;
-	slock_t		mutex;
-	SharedBitmapState state;
+	pg_atomic_uint32 state;
 	ConditionVariable cv;
 } ParallelBitmapHeapState;
 
@@ -228,9 +226,7 @@ BitmapHeapNext(BitmapHeapScanState *node)
 static inline void
 BitmapDoneInitializingSharedState(ParallelBitmapHeapState *pstate)
 {
-	SpinLockAcquire(&pstate->mutex);
-	pstate->state = BM_FINISHED;
-	SpinLockRelease(&pstate->mutex);
+	pg_atomic_write_membarrier_u32(&pstate->state, BM_FINISHED);
 	ConditionVariableBroadcast(&pstate->cv);
 }
 
@@ -476,15 +472,12 @@ ExecInitBitmapHeapScan(BitmapHeapScan *node, EState *estate, int eflags)
 static bool
 BitmapShouldInitializeSharedState(ParallelBitmapHeapState *pstate)
 {
-	SharedBitmapState state;
+	uint32		state;
 
 	while (1)
 	{
-		SpinLockAcquire(&pstate->mutex);
-		state = pstate->state;
-		if (pstate->state == BM_INITIAL)
-			pstate->state = BM_INPROGRESS;
-		SpinLockRelease(&pstate->mutex);
+		state = BM_INITIAL;
+		pg_atomic_compare_exchange_u32(&pstate->state, &state, BM_INPROGRESS);
 
 		/* Exit if bitmap is done, or if we're the leader. */
 		if (state != BM_INPROGRESS)
@@ -538,9 +531,7 @@ ExecBitmapHeapInitializeDSM(BitmapHeapScanState *node,
 
 	pstate->tbmiterator = 0;
 
-	/* Initialize the mutex */
-	SpinLockInit(&pstate->mutex);
-	pstate->state = BM_INITIAL;
+	pg_atomic_init_u32(&pstate->state, BM_INITIAL);
 
 	ConditionVariableInit(&pstate->cv);
 
@@ -565,7 +556,7 @@ ExecBitmapHeapReInitializeDSM(BitmapHeapScanState *node,
 	if (dsa == NULL)
 		return;
 
-	pstate->state = BM_INITIAL;
+	pg_atomic_write_u32(&pstate->state, BM_INITIAL);
 
 	if (DsaPointerIsValid(pstate->tbmiterator))
 		tbm_free_shared_area(dsa, pstate->tbmiterator);
-- 
2.50.1 (Apple Git-155)


--Xf36GNcW+0xZNily
Content-Type: text/plain; charset=us-ascii
Content-Disposition: attachment;
	filename=v2-0003-convert-FixedParallelState-last_xlog_end-to-an-at.patch



^ permalink  raw  reply  [nested|flat] 440+ messages in thread

* [PATCH v2 2/9] convert ParallelBitmapHeapState->state to an atomic
@ 2026-07-09 18:38 Nathan Bossart <nathan@postgresql.org>
  0 siblings, 0 replies; 440+ messages in thread

From: Nathan Bossart @ 2026-07-09 18:38 UTC (permalink / raw)

---
 src/backend/executor/nodeBitmapHeapscan.c | 23 +++++++----------------
 1 file changed, 7 insertions(+), 16 deletions(-)

diff --git a/src/backend/executor/nodeBitmapHeapscan.c b/src/backend/executor/nodeBitmapHeapscan.c
index 83d6478bc2b..a9e83f30687 100644
--- a/src/backend/executor/nodeBitmapHeapscan.c
+++ b/src/backend/executor/nodeBitmapHeapscan.c
@@ -79,7 +79,6 @@ typedef enum
 /* ----------------
  *	 ParallelBitmapHeapState information
  *		tbmiterator				iterator for scanning current pages
- *		mutex					mutual exclusion for state
  *		state					current state of the TIDBitmap
  *		cv						conditional wait variable
  * ----------------
@@ -87,8 +86,7 @@ typedef enum
 typedef struct ParallelBitmapHeapState
 {
 	dsa_pointer tbmiterator;
-	slock_t		mutex;
-	SharedBitmapState state;
+	pg_atomic_uint32 state;
 	ConditionVariable cv;
 } ParallelBitmapHeapState;
 
@@ -228,9 +226,7 @@ BitmapHeapNext(BitmapHeapScanState *node)
 static inline void
 BitmapDoneInitializingSharedState(ParallelBitmapHeapState *pstate)
 {
-	SpinLockAcquire(&pstate->mutex);
-	pstate->state = BM_FINISHED;
-	SpinLockRelease(&pstate->mutex);
+	pg_atomic_write_membarrier_u32(&pstate->state, BM_FINISHED);
 	ConditionVariableBroadcast(&pstate->cv);
 }
 
@@ -476,15 +472,12 @@ ExecInitBitmapHeapScan(BitmapHeapScan *node, EState *estate, int eflags)
 static bool
 BitmapShouldInitializeSharedState(ParallelBitmapHeapState *pstate)
 {
-	SharedBitmapState state;
+	uint32		state;
 
 	while (1)
 	{
-		SpinLockAcquire(&pstate->mutex);
-		state = pstate->state;
-		if (pstate->state == BM_INITIAL)
-			pstate->state = BM_INPROGRESS;
-		SpinLockRelease(&pstate->mutex);
+		state = BM_INITIAL;
+		pg_atomic_compare_exchange_u32(&pstate->state, &state, BM_INPROGRESS);
 
 		/* Exit if bitmap is done, or if we're the leader. */
 		if (state != BM_INPROGRESS)
@@ -538,9 +531,7 @@ ExecBitmapHeapInitializeDSM(BitmapHeapScanState *node,
 
 	pstate->tbmiterator = 0;
 
-	/* Initialize the mutex */
-	SpinLockInit(&pstate->mutex);
-	pstate->state = BM_INITIAL;
+	pg_atomic_init_u32(&pstate->state, BM_INITIAL);
 
 	ConditionVariableInit(&pstate->cv);
 
@@ -565,7 +556,7 @@ ExecBitmapHeapReInitializeDSM(BitmapHeapScanState *node,
 	if (dsa == NULL)
 		return;
 
-	pstate->state = BM_INITIAL;
+	pg_atomic_write_u32(&pstate->state, BM_INITIAL);
 
 	if (DsaPointerIsValid(pstate->tbmiterator))
 		tbm_free_shared_area(dsa, pstate->tbmiterator);
-- 
2.50.1 (Apple Git-155)


--Xf36GNcW+0xZNily
Content-Type: text/plain; charset=us-ascii
Content-Disposition: attachment;
	filename=v2-0003-convert-FixedParallelState-last_xlog_end-to-an-at.patch



^ permalink  raw  reply  [nested|flat] 440+ messages in thread

* [PATCH v1 2/8] convert ParallelBitmapHeapState->state to an atomic
@ 2026-07-09 18:38 Nathan Bossart <nathan@postgresql.org>
  0 siblings, 0 replies; 440+ messages in thread

From: Nathan Bossart @ 2026-07-09 18:38 UTC (permalink / raw)

---
 src/backend/executor/nodeBitmapHeapscan.c | 21 ++++++---------------
 1 file changed, 6 insertions(+), 15 deletions(-)

diff --git a/src/backend/executor/nodeBitmapHeapscan.c b/src/backend/executor/nodeBitmapHeapscan.c
index 83d6478bc2b..f2bb487bf10 100644
--- a/src/backend/executor/nodeBitmapHeapscan.c
+++ b/src/backend/executor/nodeBitmapHeapscan.c
@@ -79,7 +79,6 @@ typedef enum
 /* ----------------
  *	 ParallelBitmapHeapState information
  *		tbmiterator				iterator for scanning current pages
- *		mutex					mutual exclusion for state
  *		state					current state of the TIDBitmap
  *		cv						conditional wait variable
  * ----------------
@@ -87,8 +86,7 @@ typedef enum
 typedef struct ParallelBitmapHeapState
 {
 	dsa_pointer tbmiterator;
-	slock_t		mutex;
-	SharedBitmapState state;
+	pg_atomic_uint32 state;
 	ConditionVariable cv;
 } ParallelBitmapHeapState;
 
@@ -228,9 +226,7 @@ BitmapHeapNext(BitmapHeapScanState *node)
 static inline void
 BitmapDoneInitializingSharedState(ParallelBitmapHeapState *pstate)
 {
-	SpinLockAcquire(&pstate->mutex);
-	pstate->state = BM_FINISHED;
-	SpinLockRelease(&pstate->mutex);
+	pg_atomic_write_membarrier_u32(&pstate->state, BM_FINISHED);
 	ConditionVariableBroadcast(&pstate->cv);
 }
 
@@ -480,11 +476,8 @@ BitmapShouldInitializeSharedState(ParallelBitmapHeapState *pstate)
 
 	while (1)
 	{
-		SpinLockAcquire(&pstate->mutex);
-		state = pstate->state;
-		if (pstate->state == BM_INITIAL)
-			pstate->state = BM_INPROGRESS;
-		SpinLockRelease(&pstate->mutex);
+		state = BM_INITIAL;
+		pg_atomic_compare_exchange_u32(&pstate->state, &state, BM_INPROGRESS);
 
 		/* Exit if bitmap is done, or if we're the leader. */
 		if (state != BM_INPROGRESS)
@@ -538,9 +531,7 @@ ExecBitmapHeapInitializeDSM(BitmapHeapScanState *node,
 
 	pstate->tbmiterator = 0;
 
-	/* Initialize the mutex */
-	SpinLockInit(&pstate->mutex);
-	pstate->state = BM_INITIAL;
+	pg_atomic_init_u32(&pstate->state, BM_INITIAL);
 
 	ConditionVariableInit(&pstate->cv);
 
@@ -565,7 +556,7 @@ ExecBitmapHeapReInitializeDSM(BitmapHeapScanState *node,
 	if (dsa == NULL)
 		return;
 
-	pstate->state = BM_INITIAL;
+	pg_atomic_write_u32(&pstate->state, BM_INITIAL);
 
 	if (DsaPointerIsValid(pstate->tbmiterator))
 		tbm_free_shared_area(dsa, pstate->tbmiterator);
-- 
2.50.1 (Apple Git-155)


--Ot5x3ffkWEuxilWO
Content-Type: text/plain; charset=us-ascii
Content-Disposition: attachment;
	filename=v1-0003-convert-FixedParallelState-last_xlog_end-to-an-at.patch



^ permalink  raw  reply  [nested|flat] 440+ messages in thread

* [PATCH v1 2/8] convert ParallelBitmapHeapState->state to an atomic
@ 2026-07-09 18:38 Nathan Bossart <nathan@postgresql.org>
  0 siblings, 0 replies; 440+ messages in thread

From: Nathan Bossart @ 2026-07-09 18:38 UTC (permalink / raw)

---
 src/backend/executor/nodeBitmapHeapscan.c | 21 ++++++---------------
 1 file changed, 6 insertions(+), 15 deletions(-)

diff --git a/src/backend/executor/nodeBitmapHeapscan.c b/src/backend/executor/nodeBitmapHeapscan.c
index 83d6478bc2b..f2bb487bf10 100644
--- a/src/backend/executor/nodeBitmapHeapscan.c
+++ b/src/backend/executor/nodeBitmapHeapscan.c
@@ -79,7 +79,6 @@ typedef enum
 /* ----------------
  *	 ParallelBitmapHeapState information
  *		tbmiterator				iterator for scanning current pages
- *		mutex					mutual exclusion for state
  *		state					current state of the TIDBitmap
  *		cv						conditional wait variable
  * ----------------
@@ -87,8 +86,7 @@ typedef enum
 typedef struct ParallelBitmapHeapState
 {
 	dsa_pointer tbmiterator;
-	slock_t		mutex;
-	SharedBitmapState state;
+	pg_atomic_uint32 state;
 	ConditionVariable cv;
 } ParallelBitmapHeapState;
 
@@ -228,9 +226,7 @@ BitmapHeapNext(BitmapHeapScanState *node)
 static inline void
 BitmapDoneInitializingSharedState(ParallelBitmapHeapState *pstate)
 {
-	SpinLockAcquire(&pstate->mutex);
-	pstate->state = BM_FINISHED;
-	SpinLockRelease(&pstate->mutex);
+	pg_atomic_write_membarrier_u32(&pstate->state, BM_FINISHED);
 	ConditionVariableBroadcast(&pstate->cv);
 }
 
@@ -480,11 +476,8 @@ BitmapShouldInitializeSharedState(ParallelBitmapHeapState *pstate)
 
 	while (1)
 	{
-		SpinLockAcquire(&pstate->mutex);
-		state = pstate->state;
-		if (pstate->state == BM_INITIAL)
-			pstate->state = BM_INPROGRESS;
-		SpinLockRelease(&pstate->mutex);
+		state = BM_INITIAL;
+		pg_atomic_compare_exchange_u32(&pstate->state, &state, BM_INPROGRESS);
 
 		/* Exit if bitmap is done, or if we're the leader. */
 		if (state != BM_INPROGRESS)
@@ -538,9 +531,7 @@ ExecBitmapHeapInitializeDSM(BitmapHeapScanState *node,
 
 	pstate->tbmiterator = 0;
 
-	/* Initialize the mutex */
-	SpinLockInit(&pstate->mutex);
-	pstate->state = BM_INITIAL;
+	pg_atomic_init_u32(&pstate->state, BM_INITIAL);
 
 	ConditionVariableInit(&pstate->cv);
 
@@ -565,7 +556,7 @@ ExecBitmapHeapReInitializeDSM(BitmapHeapScanState *node,
 	if (dsa == NULL)
 		return;
 
-	pstate->state = BM_INITIAL;
+	pg_atomic_write_u32(&pstate->state, BM_INITIAL);
 
 	if (DsaPointerIsValid(pstate->tbmiterator))
 		tbm_free_shared_area(dsa, pstate->tbmiterator);
-- 
2.50.1 (Apple Git-155)


--Ot5x3ffkWEuxilWO
Content-Type: text/plain; charset=us-ascii
Content-Disposition: attachment;
	filename=v1-0003-convert-FixedParallelState-last_xlog_end-to-an-at.patch



^ permalink  raw  reply  [nested|flat] 440+ messages in thread

* [PATCH v1 2/8] convert ParallelBitmapHeapState->state to an atomic
@ 2026-07-09 18:38 Nathan Bossart <nathan@postgresql.org>
  0 siblings, 0 replies; 440+ messages in thread

From: Nathan Bossart @ 2026-07-09 18:38 UTC (permalink / raw)

---
 src/backend/executor/nodeBitmapHeapscan.c | 21 ++++++---------------
 1 file changed, 6 insertions(+), 15 deletions(-)

diff --git a/src/backend/executor/nodeBitmapHeapscan.c b/src/backend/executor/nodeBitmapHeapscan.c
index 83d6478bc2b..f2bb487bf10 100644
--- a/src/backend/executor/nodeBitmapHeapscan.c
+++ b/src/backend/executor/nodeBitmapHeapscan.c
@@ -79,7 +79,6 @@ typedef enum
 /* ----------------
  *	 ParallelBitmapHeapState information
  *		tbmiterator				iterator for scanning current pages
- *		mutex					mutual exclusion for state
  *		state					current state of the TIDBitmap
  *		cv						conditional wait variable
  * ----------------
@@ -87,8 +86,7 @@ typedef enum
 typedef struct ParallelBitmapHeapState
 {
 	dsa_pointer tbmiterator;
-	slock_t		mutex;
-	SharedBitmapState state;
+	pg_atomic_uint32 state;
 	ConditionVariable cv;
 } ParallelBitmapHeapState;
 
@@ -228,9 +226,7 @@ BitmapHeapNext(BitmapHeapScanState *node)
 static inline void
 BitmapDoneInitializingSharedState(ParallelBitmapHeapState *pstate)
 {
-	SpinLockAcquire(&pstate->mutex);
-	pstate->state = BM_FINISHED;
-	SpinLockRelease(&pstate->mutex);
+	pg_atomic_write_membarrier_u32(&pstate->state, BM_FINISHED);
 	ConditionVariableBroadcast(&pstate->cv);
 }
 
@@ -480,11 +476,8 @@ BitmapShouldInitializeSharedState(ParallelBitmapHeapState *pstate)
 
 	while (1)
 	{
-		SpinLockAcquire(&pstate->mutex);
-		state = pstate->state;
-		if (pstate->state == BM_INITIAL)
-			pstate->state = BM_INPROGRESS;
-		SpinLockRelease(&pstate->mutex);
+		state = BM_INITIAL;
+		pg_atomic_compare_exchange_u32(&pstate->state, &state, BM_INPROGRESS);
 
 		/* Exit if bitmap is done, or if we're the leader. */
 		if (state != BM_INPROGRESS)
@@ -538,9 +531,7 @@ ExecBitmapHeapInitializeDSM(BitmapHeapScanState *node,
 
 	pstate->tbmiterator = 0;
 
-	/* Initialize the mutex */
-	SpinLockInit(&pstate->mutex);
-	pstate->state = BM_INITIAL;
+	pg_atomic_init_u32(&pstate->state, BM_INITIAL);
 
 	ConditionVariableInit(&pstate->cv);
 
@@ -565,7 +556,7 @@ ExecBitmapHeapReInitializeDSM(BitmapHeapScanState *node,
 	if (dsa == NULL)
 		return;
 
-	pstate->state = BM_INITIAL;
+	pg_atomic_write_u32(&pstate->state, BM_INITIAL);
 
 	if (DsaPointerIsValid(pstate->tbmiterator))
 		tbm_free_shared_area(dsa, pstate->tbmiterator);
-- 
2.50.1 (Apple Git-155)


--Ot5x3ffkWEuxilWO
Content-Type: text/plain; charset=us-ascii
Content-Disposition: attachment;
	filename=v1-0003-convert-FixedParallelState-last_xlog_end-to-an-at.patch



^ permalink  raw  reply  [nested|flat] 440+ messages in thread

* [PATCH v2 2/9] convert ParallelBitmapHeapState->state to an atomic
@ 2026-07-09 18:38 Nathan Bossart <nathan@postgresql.org>
  0 siblings, 0 replies; 440+ messages in thread

From: Nathan Bossart @ 2026-07-09 18:38 UTC (permalink / raw)

---
 src/backend/executor/nodeBitmapHeapscan.c | 23 +++++++----------------
 1 file changed, 7 insertions(+), 16 deletions(-)

diff --git a/src/backend/executor/nodeBitmapHeapscan.c b/src/backend/executor/nodeBitmapHeapscan.c
index 83d6478bc2b..a9e83f30687 100644
--- a/src/backend/executor/nodeBitmapHeapscan.c
+++ b/src/backend/executor/nodeBitmapHeapscan.c
@@ -79,7 +79,6 @@ typedef enum
 /* ----------------
  *	 ParallelBitmapHeapState information
  *		tbmiterator				iterator for scanning current pages
- *		mutex					mutual exclusion for state
  *		state					current state of the TIDBitmap
  *		cv						conditional wait variable
  * ----------------
@@ -87,8 +86,7 @@ typedef enum
 typedef struct ParallelBitmapHeapState
 {
 	dsa_pointer tbmiterator;
-	slock_t		mutex;
-	SharedBitmapState state;
+	pg_atomic_uint32 state;
 	ConditionVariable cv;
 } ParallelBitmapHeapState;
 
@@ -228,9 +226,7 @@ BitmapHeapNext(BitmapHeapScanState *node)
 static inline void
 BitmapDoneInitializingSharedState(ParallelBitmapHeapState *pstate)
 {
-	SpinLockAcquire(&pstate->mutex);
-	pstate->state = BM_FINISHED;
-	SpinLockRelease(&pstate->mutex);
+	pg_atomic_write_membarrier_u32(&pstate->state, BM_FINISHED);
 	ConditionVariableBroadcast(&pstate->cv);
 }
 
@@ -476,15 +472,12 @@ ExecInitBitmapHeapScan(BitmapHeapScan *node, EState *estate, int eflags)
 static bool
 BitmapShouldInitializeSharedState(ParallelBitmapHeapState *pstate)
 {
-	SharedBitmapState state;
+	uint32		state;
 
 	while (1)
 	{
-		SpinLockAcquire(&pstate->mutex);
-		state = pstate->state;
-		if (pstate->state == BM_INITIAL)
-			pstate->state = BM_INPROGRESS;
-		SpinLockRelease(&pstate->mutex);
+		state = BM_INITIAL;
+		pg_atomic_compare_exchange_u32(&pstate->state, &state, BM_INPROGRESS);
 
 		/* Exit if bitmap is done, or if we're the leader. */
 		if (state != BM_INPROGRESS)
@@ -538,9 +531,7 @@ ExecBitmapHeapInitializeDSM(BitmapHeapScanState *node,
 
 	pstate->tbmiterator = 0;
 
-	/* Initialize the mutex */
-	SpinLockInit(&pstate->mutex);
-	pstate->state = BM_INITIAL;
+	pg_atomic_init_u32(&pstate->state, BM_INITIAL);
 
 	ConditionVariableInit(&pstate->cv);
 
@@ -565,7 +556,7 @@ ExecBitmapHeapReInitializeDSM(BitmapHeapScanState *node,
 	if (dsa == NULL)
 		return;
 
-	pstate->state = BM_INITIAL;
+	pg_atomic_write_u32(&pstate->state, BM_INITIAL);
 
 	if (DsaPointerIsValid(pstate->tbmiterator))
 		tbm_free_shared_area(dsa, pstate->tbmiterator);
-- 
2.50.1 (Apple Git-155)


--Xf36GNcW+0xZNily
Content-Type: text/plain; charset=us-ascii
Content-Disposition: attachment;
	filename=v2-0003-convert-FixedParallelState-last_xlog_end-to-an-at.patch



^ permalink  raw  reply  [nested|flat] 440+ messages in thread

* [PATCH v1 2/8] convert ParallelBitmapHeapState->state to an atomic
@ 2026-07-09 18:38 Nathan Bossart <nathan@postgresql.org>
  0 siblings, 0 replies; 440+ messages in thread

From: Nathan Bossart @ 2026-07-09 18:38 UTC (permalink / raw)

---
 src/backend/executor/nodeBitmapHeapscan.c | 21 ++++++---------------
 1 file changed, 6 insertions(+), 15 deletions(-)

diff --git a/src/backend/executor/nodeBitmapHeapscan.c b/src/backend/executor/nodeBitmapHeapscan.c
index 83d6478bc2b..f2bb487bf10 100644
--- a/src/backend/executor/nodeBitmapHeapscan.c
+++ b/src/backend/executor/nodeBitmapHeapscan.c
@@ -79,7 +79,6 @@ typedef enum
 /* ----------------
  *	 ParallelBitmapHeapState information
  *		tbmiterator				iterator for scanning current pages
- *		mutex					mutual exclusion for state
  *		state					current state of the TIDBitmap
  *		cv						conditional wait variable
  * ----------------
@@ -87,8 +86,7 @@ typedef enum
 typedef struct ParallelBitmapHeapState
 {
 	dsa_pointer tbmiterator;
-	slock_t		mutex;
-	SharedBitmapState state;
+	pg_atomic_uint32 state;
 	ConditionVariable cv;
 } ParallelBitmapHeapState;
 
@@ -228,9 +226,7 @@ BitmapHeapNext(BitmapHeapScanState *node)
 static inline void
 BitmapDoneInitializingSharedState(ParallelBitmapHeapState *pstate)
 {
-	SpinLockAcquire(&pstate->mutex);
-	pstate->state = BM_FINISHED;
-	SpinLockRelease(&pstate->mutex);
+	pg_atomic_write_membarrier_u32(&pstate->state, BM_FINISHED);
 	ConditionVariableBroadcast(&pstate->cv);
 }
 
@@ -480,11 +476,8 @@ BitmapShouldInitializeSharedState(ParallelBitmapHeapState *pstate)
 
 	while (1)
 	{
-		SpinLockAcquire(&pstate->mutex);
-		state = pstate->state;
-		if (pstate->state == BM_INITIAL)
-			pstate->state = BM_INPROGRESS;
-		SpinLockRelease(&pstate->mutex);
+		state = BM_INITIAL;
+		pg_atomic_compare_exchange_u32(&pstate->state, &state, BM_INPROGRESS);
 
 		/* Exit if bitmap is done, or if we're the leader. */
 		if (state != BM_INPROGRESS)
@@ -538,9 +531,7 @@ ExecBitmapHeapInitializeDSM(BitmapHeapScanState *node,
 
 	pstate->tbmiterator = 0;
 
-	/* Initialize the mutex */
-	SpinLockInit(&pstate->mutex);
-	pstate->state = BM_INITIAL;
+	pg_atomic_init_u32(&pstate->state, BM_INITIAL);
 
 	ConditionVariableInit(&pstate->cv);
 
@@ -565,7 +556,7 @@ ExecBitmapHeapReInitializeDSM(BitmapHeapScanState *node,
 	if (dsa == NULL)
 		return;
 
-	pstate->state = BM_INITIAL;
+	pg_atomic_write_u32(&pstate->state, BM_INITIAL);
 
 	if (DsaPointerIsValid(pstate->tbmiterator))
 		tbm_free_shared_area(dsa, pstate->tbmiterator);
-- 
2.50.1 (Apple Git-155)


--Ot5x3ffkWEuxilWO
Content-Type: text/plain; charset=us-ascii
Content-Disposition: attachment;
	filename=v1-0003-convert-FixedParallelState-last_xlog_end-to-an-at.patch



^ permalink  raw  reply  [nested|flat] 440+ messages in thread

* [PATCH v1 2/8] convert ParallelBitmapHeapState->state to an atomic
@ 2026-07-09 18:38 Nathan Bossart <nathan@postgresql.org>
  0 siblings, 0 replies; 440+ messages in thread

From: Nathan Bossart @ 2026-07-09 18:38 UTC (permalink / raw)

---
 src/backend/executor/nodeBitmapHeapscan.c | 21 ++++++---------------
 1 file changed, 6 insertions(+), 15 deletions(-)

diff --git a/src/backend/executor/nodeBitmapHeapscan.c b/src/backend/executor/nodeBitmapHeapscan.c
index 83d6478bc2b..f2bb487bf10 100644
--- a/src/backend/executor/nodeBitmapHeapscan.c
+++ b/src/backend/executor/nodeBitmapHeapscan.c
@@ -79,7 +79,6 @@ typedef enum
 /* ----------------
  *	 ParallelBitmapHeapState information
  *		tbmiterator				iterator for scanning current pages
- *		mutex					mutual exclusion for state
  *		state					current state of the TIDBitmap
  *		cv						conditional wait variable
  * ----------------
@@ -87,8 +86,7 @@ typedef enum
 typedef struct ParallelBitmapHeapState
 {
 	dsa_pointer tbmiterator;
-	slock_t		mutex;
-	SharedBitmapState state;
+	pg_atomic_uint32 state;
 	ConditionVariable cv;
 } ParallelBitmapHeapState;
 
@@ -228,9 +226,7 @@ BitmapHeapNext(BitmapHeapScanState *node)
 static inline void
 BitmapDoneInitializingSharedState(ParallelBitmapHeapState *pstate)
 {
-	SpinLockAcquire(&pstate->mutex);
-	pstate->state = BM_FINISHED;
-	SpinLockRelease(&pstate->mutex);
+	pg_atomic_write_membarrier_u32(&pstate->state, BM_FINISHED);
 	ConditionVariableBroadcast(&pstate->cv);
 }
 
@@ -480,11 +476,8 @@ BitmapShouldInitializeSharedState(ParallelBitmapHeapState *pstate)
 
 	while (1)
 	{
-		SpinLockAcquire(&pstate->mutex);
-		state = pstate->state;
-		if (pstate->state == BM_INITIAL)
-			pstate->state = BM_INPROGRESS;
-		SpinLockRelease(&pstate->mutex);
+		state = BM_INITIAL;
+		pg_atomic_compare_exchange_u32(&pstate->state, &state, BM_INPROGRESS);
 
 		/* Exit if bitmap is done, or if we're the leader. */
 		if (state != BM_INPROGRESS)
@@ -538,9 +531,7 @@ ExecBitmapHeapInitializeDSM(BitmapHeapScanState *node,
 
 	pstate->tbmiterator = 0;
 
-	/* Initialize the mutex */
-	SpinLockInit(&pstate->mutex);
-	pstate->state = BM_INITIAL;
+	pg_atomic_init_u32(&pstate->state, BM_INITIAL);
 
 	ConditionVariableInit(&pstate->cv);
 
@@ -565,7 +556,7 @@ ExecBitmapHeapReInitializeDSM(BitmapHeapScanState *node,
 	if (dsa == NULL)
 		return;
 
-	pstate->state = BM_INITIAL;
+	pg_atomic_write_u32(&pstate->state, BM_INITIAL);
 
 	if (DsaPointerIsValid(pstate->tbmiterator))
 		tbm_free_shared_area(dsa, pstate->tbmiterator);
-- 
2.50.1 (Apple Git-155)


--Ot5x3ffkWEuxilWO
Content-Type: text/plain; charset=us-ascii
Content-Disposition: attachment;
	filename=v1-0003-convert-FixedParallelState-last_xlog_end-to-an-at.patch



^ permalink  raw  reply  [nested|flat] 440+ messages in thread

* [PATCH v2 2/9] convert ParallelBitmapHeapState->state to an atomic
@ 2026-07-09 18:38 Nathan Bossart <nathan@postgresql.org>
  0 siblings, 0 replies; 440+ messages in thread

From: Nathan Bossart @ 2026-07-09 18:38 UTC (permalink / raw)

---
 src/backend/executor/nodeBitmapHeapscan.c | 23 +++++++----------------
 1 file changed, 7 insertions(+), 16 deletions(-)

diff --git a/src/backend/executor/nodeBitmapHeapscan.c b/src/backend/executor/nodeBitmapHeapscan.c
index 83d6478bc2b..a9e83f30687 100644
--- a/src/backend/executor/nodeBitmapHeapscan.c
+++ b/src/backend/executor/nodeBitmapHeapscan.c
@@ -79,7 +79,6 @@ typedef enum
 /* ----------------
  *	 ParallelBitmapHeapState information
  *		tbmiterator				iterator for scanning current pages
- *		mutex					mutual exclusion for state
  *		state					current state of the TIDBitmap
  *		cv						conditional wait variable
  * ----------------
@@ -87,8 +86,7 @@ typedef enum
 typedef struct ParallelBitmapHeapState
 {
 	dsa_pointer tbmiterator;
-	slock_t		mutex;
-	SharedBitmapState state;
+	pg_atomic_uint32 state;
 	ConditionVariable cv;
 } ParallelBitmapHeapState;
 
@@ -228,9 +226,7 @@ BitmapHeapNext(BitmapHeapScanState *node)
 static inline void
 BitmapDoneInitializingSharedState(ParallelBitmapHeapState *pstate)
 {
-	SpinLockAcquire(&pstate->mutex);
-	pstate->state = BM_FINISHED;
-	SpinLockRelease(&pstate->mutex);
+	pg_atomic_write_membarrier_u32(&pstate->state, BM_FINISHED);
 	ConditionVariableBroadcast(&pstate->cv);
 }
 
@@ -476,15 +472,12 @@ ExecInitBitmapHeapScan(BitmapHeapScan *node, EState *estate, int eflags)
 static bool
 BitmapShouldInitializeSharedState(ParallelBitmapHeapState *pstate)
 {
-	SharedBitmapState state;
+	uint32		state;
 
 	while (1)
 	{
-		SpinLockAcquire(&pstate->mutex);
-		state = pstate->state;
-		if (pstate->state == BM_INITIAL)
-			pstate->state = BM_INPROGRESS;
-		SpinLockRelease(&pstate->mutex);
+		state = BM_INITIAL;
+		pg_atomic_compare_exchange_u32(&pstate->state, &state, BM_INPROGRESS);
 
 		/* Exit if bitmap is done, or if we're the leader. */
 		if (state != BM_INPROGRESS)
@@ -538,9 +531,7 @@ ExecBitmapHeapInitializeDSM(BitmapHeapScanState *node,
 
 	pstate->tbmiterator = 0;
 
-	/* Initialize the mutex */
-	SpinLockInit(&pstate->mutex);
-	pstate->state = BM_INITIAL;
+	pg_atomic_init_u32(&pstate->state, BM_INITIAL);
 
 	ConditionVariableInit(&pstate->cv);
 
@@ -565,7 +556,7 @@ ExecBitmapHeapReInitializeDSM(BitmapHeapScanState *node,
 	if (dsa == NULL)
 		return;
 
-	pstate->state = BM_INITIAL;
+	pg_atomic_write_u32(&pstate->state, BM_INITIAL);
 
 	if (DsaPointerIsValid(pstate->tbmiterator))
 		tbm_free_shared_area(dsa, pstate->tbmiterator);
-- 
2.50.1 (Apple Git-155)


--Xf36GNcW+0xZNily
Content-Type: text/plain; charset=us-ascii
Content-Disposition: attachment;
	filename=v2-0003-convert-FixedParallelState-last_xlog_end-to-an-at.patch



^ permalink  raw  reply  [nested|flat] 440+ messages in thread

* [PATCH v1 2/8] convert ParallelBitmapHeapState->state to an atomic
@ 2026-07-09 18:38 Nathan Bossart <nathan@postgresql.org>
  0 siblings, 0 replies; 440+ messages in thread

From: Nathan Bossart @ 2026-07-09 18:38 UTC (permalink / raw)

---
 src/backend/executor/nodeBitmapHeapscan.c | 21 ++++++---------------
 1 file changed, 6 insertions(+), 15 deletions(-)

diff --git a/src/backend/executor/nodeBitmapHeapscan.c b/src/backend/executor/nodeBitmapHeapscan.c
index 83d6478bc2b..f2bb487bf10 100644
--- a/src/backend/executor/nodeBitmapHeapscan.c
+++ b/src/backend/executor/nodeBitmapHeapscan.c
@@ -79,7 +79,6 @@ typedef enum
 /* ----------------
  *	 ParallelBitmapHeapState information
  *		tbmiterator				iterator for scanning current pages
- *		mutex					mutual exclusion for state
  *		state					current state of the TIDBitmap
  *		cv						conditional wait variable
  * ----------------
@@ -87,8 +86,7 @@ typedef enum
 typedef struct ParallelBitmapHeapState
 {
 	dsa_pointer tbmiterator;
-	slock_t		mutex;
-	SharedBitmapState state;
+	pg_atomic_uint32 state;
 	ConditionVariable cv;
 } ParallelBitmapHeapState;
 
@@ -228,9 +226,7 @@ BitmapHeapNext(BitmapHeapScanState *node)
 static inline void
 BitmapDoneInitializingSharedState(ParallelBitmapHeapState *pstate)
 {
-	SpinLockAcquire(&pstate->mutex);
-	pstate->state = BM_FINISHED;
-	SpinLockRelease(&pstate->mutex);
+	pg_atomic_write_membarrier_u32(&pstate->state, BM_FINISHED);
 	ConditionVariableBroadcast(&pstate->cv);
 }
 
@@ -480,11 +476,8 @@ BitmapShouldInitializeSharedState(ParallelBitmapHeapState *pstate)
 
 	while (1)
 	{
-		SpinLockAcquire(&pstate->mutex);
-		state = pstate->state;
-		if (pstate->state == BM_INITIAL)
-			pstate->state = BM_INPROGRESS;
-		SpinLockRelease(&pstate->mutex);
+		state = BM_INITIAL;
+		pg_atomic_compare_exchange_u32(&pstate->state, &state, BM_INPROGRESS);
 
 		/* Exit if bitmap is done, or if we're the leader. */
 		if (state != BM_INPROGRESS)
@@ -538,9 +531,7 @@ ExecBitmapHeapInitializeDSM(BitmapHeapScanState *node,
 
 	pstate->tbmiterator = 0;
 
-	/* Initialize the mutex */
-	SpinLockInit(&pstate->mutex);
-	pstate->state = BM_INITIAL;
+	pg_atomic_init_u32(&pstate->state, BM_INITIAL);
 
 	ConditionVariableInit(&pstate->cv);
 
@@ -565,7 +556,7 @@ ExecBitmapHeapReInitializeDSM(BitmapHeapScanState *node,
 	if (dsa == NULL)
 		return;
 
-	pstate->state = BM_INITIAL;
+	pg_atomic_write_u32(&pstate->state, BM_INITIAL);
 
 	if (DsaPointerIsValid(pstate->tbmiterator))
 		tbm_free_shared_area(dsa, pstate->tbmiterator);
-- 
2.50.1 (Apple Git-155)


--Ot5x3ffkWEuxilWO
Content-Type: text/plain; charset=us-ascii
Content-Disposition: attachment;
	filename=v1-0003-convert-FixedParallelState-last_xlog_end-to-an-at.patch



^ permalink  raw  reply  [nested|flat] 440+ messages in thread

* [PATCH v1 2/8] convert ParallelBitmapHeapState->state to an atomic
@ 2026-07-09 18:38 Nathan Bossart <nathan@postgresql.org>
  0 siblings, 0 replies; 440+ messages in thread

From: Nathan Bossart @ 2026-07-09 18:38 UTC (permalink / raw)

---
 src/backend/executor/nodeBitmapHeapscan.c | 21 ++++++---------------
 1 file changed, 6 insertions(+), 15 deletions(-)

diff --git a/src/backend/executor/nodeBitmapHeapscan.c b/src/backend/executor/nodeBitmapHeapscan.c
index 83d6478bc2b..f2bb487bf10 100644
--- a/src/backend/executor/nodeBitmapHeapscan.c
+++ b/src/backend/executor/nodeBitmapHeapscan.c
@@ -79,7 +79,6 @@ typedef enum
 /* ----------------
  *	 ParallelBitmapHeapState information
  *		tbmiterator				iterator for scanning current pages
- *		mutex					mutual exclusion for state
  *		state					current state of the TIDBitmap
  *		cv						conditional wait variable
  * ----------------
@@ -87,8 +86,7 @@ typedef enum
 typedef struct ParallelBitmapHeapState
 {
 	dsa_pointer tbmiterator;
-	slock_t		mutex;
-	SharedBitmapState state;
+	pg_atomic_uint32 state;
 	ConditionVariable cv;
 } ParallelBitmapHeapState;
 
@@ -228,9 +226,7 @@ BitmapHeapNext(BitmapHeapScanState *node)
 static inline void
 BitmapDoneInitializingSharedState(ParallelBitmapHeapState *pstate)
 {
-	SpinLockAcquire(&pstate->mutex);
-	pstate->state = BM_FINISHED;
-	SpinLockRelease(&pstate->mutex);
+	pg_atomic_write_membarrier_u32(&pstate->state, BM_FINISHED);
 	ConditionVariableBroadcast(&pstate->cv);
 }
 
@@ -480,11 +476,8 @@ BitmapShouldInitializeSharedState(ParallelBitmapHeapState *pstate)
 
 	while (1)
 	{
-		SpinLockAcquire(&pstate->mutex);
-		state = pstate->state;
-		if (pstate->state == BM_INITIAL)
-			pstate->state = BM_INPROGRESS;
-		SpinLockRelease(&pstate->mutex);
+		state = BM_INITIAL;
+		pg_atomic_compare_exchange_u32(&pstate->state, &state, BM_INPROGRESS);
 
 		/* Exit if bitmap is done, or if we're the leader. */
 		if (state != BM_INPROGRESS)
@@ -538,9 +531,7 @@ ExecBitmapHeapInitializeDSM(BitmapHeapScanState *node,
 
 	pstate->tbmiterator = 0;
 
-	/* Initialize the mutex */
-	SpinLockInit(&pstate->mutex);
-	pstate->state = BM_INITIAL;
+	pg_atomic_init_u32(&pstate->state, BM_INITIAL);
 
 	ConditionVariableInit(&pstate->cv);
 
@@ -565,7 +556,7 @@ ExecBitmapHeapReInitializeDSM(BitmapHeapScanState *node,
 	if (dsa == NULL)
 		return;
 
-	pstate->state = BM_INITIAL;
+	pg_atomic_write_u32(&pstate->state, BM_INITIAL);
 
 	if (DsaPointerIsValid(pstate->tbmiterator))
 		tbm_free_shared_area(dsa, pstate->tbmiterator);
-- 
2.50.1 (Apple Git-155)


--Ot5x3ffkWEuxilWO
Content-Type: text/plain; charset=us-ascii
Content-Disposition: attachment;
	filename=v1-0003-convert-FixedParallelState-last_xlog_end-to-an-at.patch



^ permalink  raw  reply  [nested|flat] 440+ messages in thread

* [PATCH v1 2/8] convert ParallelBitmapHeapState->state to an atomic
@ 2026-07-09 18:38 Nathan Bossart <nathan@postgresql.org>
  0 siblings, 0 replies; 440+ messages in thread

From: Nathan Bossart @ 2026-07-09 18:38 UTC (permalink / raw)

---
 src/backend/executor/nodeBitmapHeapscan.c | 21 ++++++---------------
 1 file changed, 6 insertions(+), 15 deletions(-)

diff --git a/src/backend/executor/nodeBitmapHeapscan.c b/src/backend/executor/nodeBitmapHeapscan.c
index 83d6478bc2b..f2bb487bf10 100644
--- a/src/backend/executor/nodeBitmapHeapscan.c
+++ b/src/backend/executor/nodeBitmapHeapscan.c
@@ -79,7 +79,6 @@ typedef enum
 /* ----------------
  *	 ParallelBitmapHeapState information
  *		tbmiterator				iterator for scanning current pages
- *		mutex					mutual exclusion for state
  *		state					current state of the TIDBitmap
  *		cv						conditional wait variable
  * ----------------
@@ -87,8 +86,7 @@ typedef enum
 typedef struct ParallelBitmapHeapState
 {
 	dsa_pointer tbmiterator;
-	slock_t		mutex;
-	SharedBitmapState state;
+	pg_atomic_uint32 state;
 	ConditionVariable cv;
 } ParallelBitmapHeapState;
 
@@ -228,9 +226,7 @@ BitmapHeapNext(BitmapHeapScanState *node)
 static inline void
 BitmapDoneInitializingSharedState(ParallelBitmapHeapState *pstate)
 {
-	SpinLockAcquire(&pstate->mutex);
-	pstate->state = BM_FINISHED;
-	SpinLockRelease(&pstate->mutex);
+	pg_atomic_write_membarrier_u32(&pstate->state, BM_FINISHED);
 	ConditionVariableBroadcast(&pstate->cv);
 }
 
@@ -480,11 +476,8 @@ BitmapShouldInitializeSharedState(ParallelBitmapHeapState *pstate)
 
 	while (1)
 	{
-		SpinLockAcquire(&pstate->mutex);
-		state = pstate->state;
-		if (pstate->state == BM_INITIAL)
-			pstate->state = BM_INPROGRESS;
-		SpinLockRelease(&pstate->mutex);
+		state = BM_INITIAL;
+		pg_atomic_compare_exchange_u32(&pstate->state, &state, BM_INPROGRESS);
 
 		/* Exit if bitmap is done, or if we're the leader. */
 		if (state != BM_INPROGRESS)
@@ -538,9 +531,7 @@ ExecBitmapHeapInitializeDSM(BitmapHeapScanState *node,
 
 	pstate->tbmiterator = 0;
 
-	/* Initialize the mutex */
-	SpinLockInit(&pstate->mutex);
-	pstate->state = BM_INITIAL;
+	pg_atomic_init_u32(&pstate->state, BM_INITIAL);
 
 	ConditionVariableInit(&pstate->cv);
 
@@ -565,7 +556,7 @@ ExecBitmapHeapReInitializeDSM(BitmapHeapScanState *node,
 	if (dsa == NULL)
 		return;
 
-	pstate->state = BM_INITIAL;
+	pg_atomic_write_u32(&pstate->state, BM_INITIAL);
 
 	if (DsaPointerIsValid(pstate->tbmiterator))
 		tbm_free_shared_area(dsa, pstate->tbmiterator);
-- 
2.50.1 (Apple Git-155)


--Ot5x3ffkWEuxilWO
Content-Type: text/plain; charset=us-ascii
Content-Disposition: attachment;
	filename=v1-0003-convert-FixedParallelState-last_xlog_end-to-an-at.patch



^ permalink  raw  reply  [nested|flat] 440+ messages in thread

* [PATCH v1 2/8] convert ParallelBitmapHeapState->state to an atomic
@ 2026-07-09 18:38 Nathan Bossart <nathan@postgresql.org>
  0 siblings, 0 replies; 440+ messages in thread

From: Nathan Bossart @ 2026-07-09 18:38 UTC (permalink / raw)

---
 src/backend/executor/nodeBitmapHeapscan.c | 21 ++++++---------------
 1 file changed, 6 insertions(+), 15 deletions(-)

diff --git a/src/backend/executor/nodeBitmapHeapscan.c b/src/backend/executor/nodeBitmapHeapscan.c
index 83d6478bc2b..f2bb487bf10 100644
--- a/src/backend/executor/nodeBitmapHeapscan.c
+++ b/src/backend/executor/nodeBitmapHeapscan.c
@@ -79,7 +79,6 @@ typedef enum
 /* ----------------
  *	 ParallelBitmapHeapState information
  *		tbmiterator				iterator for scanning current pages
- *		mutex					mutual exclusion for state
  *		state					current state of the TIDBitmap
  *		cv						conditional wait variable
  * ----------------
@@ -87,8 +86,7 @@ typedef enum
 typedef struct ParallelBitmapHeapState
 {
 	dsa_pointer tbmiterator;
-	slock_t		mutex;
-	SharedBitmapState state;
+	pg_atomic_uint32 state;
 	ConditionVariable cv;
 } ParallelBitmapHeapState;
 
@@ -228,9 +226,7 @@ BitmapHeapNext(BitmapHeapScanState *node)
 static inline void
 BitmapDoneInitializingSharedState(ParallelBitmapHeapState *pstate)
 {
-	SpinLockAcquire(&pstate->mutex);
-	pstate->state = BM_FINISHED;
-	SpinLockRelease(&pstate->mutex);
+	pg_atomic_write_membarrier_u32(&pstate->state, BM_FINISHED);
 	ConditionVariableBroadcast(&pstate->cv);
 }
 
@@ -480,11 +476,8 @@ BitmapShouldInitializeSharedState(ParallelBitmapHeapState *pstate)
 
 	while (1)
 	{
-		SpinLockAcquire(&pstate->mutex);
-		state = pstate->state;
-		if (pstate->state == BM_INITIAL)
-			pstate->state = BM_INPROGRESS;
-		SpinLockRelease(&pstate->mutex);
+		state = BM_INITIAL;
+		pg_atomic_compare_exchange_u32(&pstate->state, &state, BM_INPROGRESS);
 
 		/* Exit if bitmap is done, or if we're the leader. */
 		if (state != BM_INPROGRESS)
@@ -538,9 +531,7 @@ ExecBitmapHeapInitializeDSM(BitmapHeapScanState *node,
 
 	pstate->tbmiterator = 0;
 
-	/* Initialize the mutex */
-	SpinLockInit(&pstate->mutex);
-	pstate->state = BM_INITIAL;
+	pg_atomic_init_u32(&pstate->state, BM_INITIAL);
 
 	ConditionVariableInit(&pstate->cv);
 
@@ -565,7 +556,7 @@ ExecBitmapHeapReInitializeDSM(BitmapHeapScanState *node,
 	if (dsa == NULL)
 		return;
 
-	pstate->state = BM_INITIAL;
+	pg_atomic_write_u32(&pstate->state, BM_INITIAL);
 
 	if (DsaPointerIsValid(pstate->tbmiterator))
 		tbm_free_shared_area(dsa, pstate->tbmiterator);
-- 
2.50.1 (Apple Git-155)


--Ot5x3ffkWEuxilWO
Content-Type: text/plain; charset=us-ascii
Content-Disposition: attachment;
	filename=v1-0003-convert-FixedParallelState-last_xlog_end-to-an-at.patch



^ permalink  raw  reply  [nested|flat] 440+ messages in thread

* [PATCH v1 2/8] convert ParallelBitmapHeapState->state to an atomic
@ 2026-07-09 18:38 Nathan Bossart <nathan@postgresql.org>
  0 siblings, 0 replies; 440+ messages in thread

From: Nathan Bossart @ 2026-07-09 18:38 UTC (permalink / raw)

---
 src/backend/executor/nodeBitmapHeapscan.c | 21 ++++++---------------
 1 file changed, 6 insertions(+), 15 deletions(-)

diff --git a/src/backend/executor/nodeBitmapHeapscan.c b/src/backend/executor/nodeBitmapHeapscan.c
index 83d6478bc2b..f2bb487bf10 100644
--- a/src/backend/executor/nodeBitmapHeapscan.c
+++ b/src/backend/executor/nodeBitmapHeapscan.c
@@ -79,7 +79,6 @@ typedef enum
 /* ----------------
  *	 ParallelBitmapHeapState information
  *		tbmiterator				iterator for scanning current pages
- *		mutex					mutual exclusion for state
  *		state					current state of the TIDBitmap
  *		cv						conditional wait variable
  * ----------------
@@ -87,8 +86,7 @@ typedef enum
 typedef struct ParallelBitmapHeapState
 {
 	dsa_pointer tbmiterator;
-	slock_t		mutex;
-	SharedBitmapState state;
+	pg_atomic_uint32 state;
 	ConditionVariable cv;
 } ParallelBitmapHeapState;
 
@@ -228,9 +226,7 @@ BitmapHeapNext(BitmapHeapScanState *node)
 static inline void
 BitmapDoneInitializingSharedState(ParallelBitmapHeapState *pstate)
 {
-	SpinLockAcquire(&pstate->mutex);
-	pstate->state = BM_FINISHED;
-	SpinLockRelease(&pstate->mutex);
+	pg_atomic_write_membarrier_u32(&pstate->state, BM_FINISHED);
 	ConditionVariableBroadcast(&pstate->cv);
 }
 
@@ -480,11 +476,8 @@ BitmapShouldInitializeSharedState(ParallelBitmapHeapState *pstate)
 
 	while (1)
 	{
-		SpinLockAcquire(&pstate->mutex);
-		state = pstate->state;
-		if (pstate->state == BM_INITIAL)
-			pstate->state = BM_INPROGRESS;
-		SpinLockRelease(&pstate->mutex);
+		state = BM_INITIAL;
+		pg_atomic_compare_exchange_u32(&pstate->state, &state, BM_INPROGRESS);
 
 		/* Exit if bitmap is done, or if we're the leader. */
 		if (state != BM_INPROGRESS)
@@ -538,9 +531,7 @@ ExecBitmapHeapInitializeDSM(BitmapHeapScanState *node,
 
 	pstate->tbmiterator = 0;
 
-	/* Initialize the mutex */
-	SpinLockInit(&pstate->mutex);
-	pstate->state = BM_INITIAL;
+	pg_atomic_init_u32(&pstate->state, BM_INITIAL);
 
 	ConditionVariableInit(&pstate->cv);
 
@@ -565,7 +556,7 @@ ExecBitmapHeapReInitializeDSM(BitmapHeapScanState *node,
 	if (dsa == NULL)
 		return;
 
-	pstate->state = BM_INITIAL;
+	pg_atomic_write_u32(&pstate->state, BM_INITIAL);
 
 	if (DsaPointerIsValid(pstate->tbmiterator))
 		tbm_free_shared_area(dsa, pstate->tbmiterator);
-- 
2.50.1 (Apple Git-155)


--Ot5x3ffkWEuxilWO
Content-Type: text/plain; charset=us-ascii
Content-Disposition: attachment;
	filename=v1-0003-convert-FixedParallelState-last_xlog_end-to-an-at.patch



^ permalink  raw  reply  [nested|flat] 440+ messages in thread

* [PATCH v1 2/8] convert ParallelBitmapHeapState->state to an atomic
@ 2026-07-09 18:38 Nathan Bossart <nathan@postgresql.org>
  0 siblings, 0 replies; 440+ messages in thread

From: Nathan Bossart @ 2026-07-09 18:38 UTC (permalink / raw)

---
 src/backend/executor/nodeBitmapHeapscan.c | 21 ++++++---------------
 1 file changed, 6 insertions(+), 15 deletions(-)

diff --git a/src/backend/executor/nodeBitmapHeapscan.c b/src/backend/executor/nodeBitmapHeapscan.c
index 83d6478bc2b..f2bb487bf10 100644
--- a/src/backend/executor/nodeBitmapHeapscan.c
+++ b/src/backend/executor/nodeBitmapHeapscan.c
@@ -79,7 +79,6 @@ typedef enum
 /* ----------------
  *	 ParallelBitmapHeapState information
  *		tbmiterator				iterator for scanning current pages
- *		mutex					mutual exclusion for state
  *		state					current state of the TIDBitmap
  *		cv						conditional wait variable
  * ----------------
@@ -87,8 +86,7 @@ typedef enum
 typedef struct ParallelBitmapHeapState
 {
 	dsa_pointer tbmiterator;
-	slock_t		mutex;
-	SharedBitmapState state;
+	pg_atomic_uint32 state;
 	ConditionVariable cv;
 } ParallelBitmapHeapState;
 
@@ -228,9 +226,7 @@ BitmapHeapNext(BitmapHeapScanState *node)
 static inline void
 BitmapDoneInitializingSharedState(ParallelBitmapHeapState *pstate)
 {
-	SpinLockAcquire(&pstate->mutex);
-	pstate->state = BM_FINISHED;
-	SpinLockRelease(&pstate->mutex);
+	pg_atomic_write_membarrier_u32(&pstate->state, BM_FINISHED);
 	ConditionVariableBroadcast(&pstate->cv);
 }
 
@@ -480,11 +476,8 @@ BitmapShouldInitializeSharedState(ParallelBitmapHeapState *pstate)
 
 	while (1)
 	{
-		SpinLockAcquire(&pstate->mutex);
-		state = pstate->state;
-		if (pstate->state == BM_INITIAL)
-			pstate->state = BM_INPROGRESS;
-		SpinLockRelease(&pstate->mutex);
+		state = BM_INITIAL;
+		pg_atomic_compare_exchange_u32(&pstate->state, &state, BM_INPROGRESS);
 
 		/* Exit if bitmap is done, or if we're the leader. */
 		if (state != BM_INPROGRESS)
@@ -538,9 +531,7 @@ ExecBitmapHeapInitializeDSM(BitmapHeapScanState *node,
 
 	pstate->tbmiterator = 0;
 
-	/* Initialize the mutex */
-	SpinLockInit(&pstate->mutex);
-	pstate->state = BM_INITIAL;
+	pg_atomic_init_u32(&pstate->state, BM_INITIAL);
 
 	ConditionVariableInit(&pstate->cv);
 
@@ -565,7 +556,7 @@ ExecBitmapHeapReInitializeDSM(BitmapHeapScanState *node,
 	if (dsa == NULL)
 		return;
 
-	pstate->state = BM_INITIAL;
+	pg_atomic_write_u32(&pstate->state, BM_INITIAL);
 
 	if (DsaPointerIsValid(pstate->tbmiterator))
 		tbm_free_shared_area(dsa, pstate->tbmiterator);
-- 
2.50.1 (Apple Git-155)


--Ot5x3ffkWEuxilWO
Content-Type: text/plain; charset=us-ascii
Content-Disposition: attachment;
	filename=v1-0003-convert-FixedParallelState-last_xlog_end-to-an-at.patch



^ permalink  raw  reply  [nested|flat] 440+ messages in thread

* [PATCH v2 2/9] convert ParallelBitmapHeapState->state to an atomic
@ 2026-07-09 18:38 Nathan Bossart <nathan@postgresql.org>
  0 siblings, 0 replies; 440+ messages in thread

From: Nathan Bossart @ 2026-07-09 18:38 UTC (permalink / raw)

---
 src/backend/executor/nodeBitmapHeapscan.c | 23 +++++++----------------
 1 file changed, 7 insertions(+), 16 deletions(-)

diff --git a/src/backend/executor/nodeBitmapHeapscan.c b/src/backend/executor/nodeBitmapHeapscan.c
index 83d6478bc2b..a9e83f30687 100644
--- a/src/backend/executor/nodeBitmapHeapscan.c
+++ b/src/backend/executor/nodeBitmapHeapscan.c
@@ -79,7 +79,6 @@ typedef enum
 /* ----------------
  *	 ParallelBitmapHeapState information
  *		tbmiterator				iterator for scanning current pages
- *		mutex					mutual exclusion for state
  *		state					current state of the TIDBitmap
  *		cv						conditional wait variable
  * ----------------
@@ -87,8 +86,7 @@ typedef enum
 typedef struct ParallelBitmapHeapState
 {
 	dsa_pointer tbmiterator;
-	slock_t		mutex;
-	SharedBitmapState state;
+	pg_atomic_uint32 state;
 	ConditionVariable cv;
 } ParallelBitmapHeapState;
 
@@ -228,9 +226,7 @@ BitmapHeapNext(BitmapHeapScanState *node)
 static inline void
 BitmapDoneInitializingSharedState(ParallelBitmapHeapState *pstate)
 {
-	SpinLockAcquire(&pstate->mutex);
-	pstate->state = BM_FINISHED;
-	SpinLockRelease(&pstate->mutex);
+	pg_atomic_write_membarrier_u32(&pstate->state, BM_FINISHED);
 	ConditionVariableBroadcast(&pstate->cv);
 }
 
@@ -476,15 +472,12 @@ ExecInitBitmapHeapScan(BitmapHeapScan *node, EState *estate, int eflags)
 static bool
 BitmapShouldInitializeSharedState(ParallelBitmapHeapState *pstate)
 {
-	SharedBitmapState state;
+	uint32		state;
 
 	while (1)
 	{
-		SpinLockAcquire(&pstate->mutex);
-		state = pstate->state;
-		if (pstate->state == BM_INITIAL)
-			pstate->state = BM_INPROGRESS;
-		SpinLockRelease(&pstate->mutex);
+		state = BM_INITIAL;
+		pg_atomic_compare_exchange_u32(&pstate->state, &state, BM_INPROGRESS);
 
 		/* Exit if bitmap is done, or if we're the leader. */
 		if (state != BM_INPROGRESS)
@@ -538,9 +531,7 @@ ExecBitmapHeapInitializeDSM(BitmapHeapScanState *node,
 
 	pstate->tbmiterator = 0;
 
-	/* Initialize the mutex */
-	SpinLockInit(&pstate->mutex);
-	pstate->state = BM_INITIAL;
+	pg_atomic_init_u32(&pstate->state, BM_INITIAL);
 
 	ConditionVariableInit(&pstate->cv);
 
@@ -565,7 +556,7 @@ ExecBitmapHeapReInitializeDSM(BitmapHeapScanState *node,
 	if (dsa == NULL)
 		return;
 
-	pstate->state = BM_INITIAL;
+	pg_atomic_write_u32(&pstate->state, BM_INITIAL);
 
 	if (DsaPointerIsValid(pstate->tbmiterator))
 		tbm_free_shared_area(dsa, pstate->tbmiterator);
-- 
2.50.1 (Apple Git-155)


--Xf36GNcW+0xZNily
Content-Type: text/plain; charset=us-ascii
Content-Disposition: attachment;
	filename=v2-0003-convert-FixedParallelState-last_xlog_end-to-an-at.patch



^ permalink  raw  reply  [nested|flat] 440+ messages in thread

* [PATCH v1 2/8] convert ParallelBitmapHeapState->state to an atomic
@ 2026-07-09 18:38 Nathan Bossart <nathan@postgresql.org>
  0 siblings, 0 replies; 440+ messages in thread

From: Nathan Bossart @ 2026-07-09 18:38 UTC (permalink / raw)

---
 src/backend/executor/nodeBitmapHeapscan.c | 21 ++++++---------------
 1 file changed, 6 insertions(+), 15 deletions(-)

diff --git a/src/backend/executor/nodeBitmapHeapscan.c b/src/backend/executor/nodeBitmapHeapscan.c
index 83d6478bc2b..f2bb487bf10 100644
--- a/src/backend/executor/nodeBitmapHeapscan.c
+++ b/src/backend/executor/nodeBitmapHeapscan.c
@@ -79,7 +79,6 @@ typedef enum
 /* ----------------
  *	 ParallelBitmapHeapState information
  *		tbmiterator				iterator for scanning current pages
- *		mutex					mutual exclusion for state
  *		state					current state of the TIDBitmap
  *		cv						conditional wait variable
  * ----------------
@@ -87,8 +86,7 @@ typedef enum
 typedef struct ParallelBitmapHeapState
 {
 	dsa_pointer tbmiterator;
-	slock_t		mutex;
-	SharedBitmapState state;
+	pg_atomic_uint32 state;
 	ConditionVariable cv;
 } ParallelBitmapHeapState;
 
@@ -228,9 +226,7 @@ BitmapHeapNext(BitmapHeapScanState *node)
 static inline void
 BitmapDoneInitializingSharedState(ParallelBitmapHeapState *pstate)
 {
-	SpinLockAcquire(&pstate->mutex);
-	pstate->state = BM_FINISHED;
-	SpinLockRelease(&pstate->mutex);
+	pg_atomic_write_membarrier_u32(&pstate->state, BM_FINISHED);
 	ConditionVariableBroadcast(&pstate->cv);
 }
 
@@ -480,11 +476,8 @@ BitmapShouldInitializeSharedState(ParallelBitmapHeapState *pstate)
 
 	while (1)
 	{
-		SpinLockAcquire(&pstate->mutex);
-		state = pstate->state;
-		if (pstate->state == BM_INITIAL)
-			pstate->state = BM_INPROGRESS;
-		SpinLockRelease(&pstate->mutex);
+		state = BM_INITIAL;
+		pg_atomic_compare_exchange_u32(&pstate->state, &state, BM_INPROGRESS);
 
 		/* Exit if bitmap is done, or if we're the leader. */
 		if (state != BM_INPROGRESS)
@@ -538,9 +531,7 @@ ExecBitmapHeapInitializeDSM(BitmapHeapScanState *node,
 
 	pstate->tbmiterator = 0;
 
-	/* Initialize the mutex */
-	SpinLockInit(&pstate->mutex);
-	pstate->state = BM_INITIAL;
+	pg_atomic_init_u32(&pstate->state, BM_INITIAL);
 
 	ConditionVariableInit(&pstate->cv);
 
@@ -565,7 +556,7 @@ ExecBitmapHeapReInitializeDSM(BitmapHeapScanState *node,
 	if (dsa == NULL)
 		return;
 
-	pstate->state = BM_INITIAL;
+	pg_atomic_write_u32(&pstate->state, BM_INITIAL);
 
 	if (DsaPointerIsValid(pstate->tbmiterator))
 		tbm_free_shared_area(dsa, pstate->tbmiterator);
-- 
2.50.1 (Apple Git-155)


--Ot5x3ffkWEuxilWO
Content-Type: text/plain; charset=us-ascii
Content-Disposition: attachment;
	filename=v1-0003-convert-FixedParallelState-last_xlog_end-to-an-at.patch



^ permalink  raw  reply  [nested|flat] 440+ messages in thread

* [PATCH v1 2/8] convert ParallelBitmapHeapState->state to an atomic
@ 2026-07-09 18:38 Nathan Bossart <nathan@postgresql.org>
  0 siblings, 0 replies; 440+ messages in thread

From: Nathan Bossart @ 2026-07-09 18:38 UTC (permalink / raw)

---
 src/backend/executor/nodeBitmapHeapscan.c | 21 ++++++---------------
 1 file changed, 6 insertions(+), 15 deletions(-)

diff --git a/src/backend/executor/nodeBitmapHeapscan.c b/src/backend/executor/nodeBitmapHeapscan.c
index 83d6478bc2b..f2bb487bf10 100644
--- a/src/backend/executor/nodeBitmapHeapscan.c
+++ b/src/backend/executor/nodeBitmapHeapscan.c
@@ -79,7 +79,6 @@ typedef enum
 /* ----------------
  *	 ParallelBitmapHeapState information
  *		tbmiterator				iterator for scanning current pages
- *		mutex					mutual exclusion for state
  *		state					current state of the TIDBitmap
  *		cv						conditional wait variable
  * ----------------
@@ -87,8 +86,7 @@ typedef enum
 typedef struct ParallelBitmapHeapState
 {
 	dsa_pointer tbmiterator;
-	slock_t		mutex;
-	SharedBitmapState state;
+	pg_atomic_uint32 state;
 	ConditionVariable cv;
 } ParallelBitmapHeapState;
 
@@ -228,9 +226,7 @@ BitmapHeapNext(BitmapHeapScanState *node)
 static inline void
 BitmapDoneInitializingSharedState(ParallelBitmapHeapState *pstate)
 {
-	SpinLockAcquire(&pstate->mutex);
-	pstate->state = BM_FINISHED;
-	SpinLockRelease(&pstate->mutex);
+	pg_atomic_write_membarrier_u32(&pstate->state, BM_FINISHED);
 	ConditionVariableBroadcast(&pstate->cv);
 }
 
@@ -480,11 +476,8 @@ BitmapShouldInitializeSharedState(ParallelBitmapHeapState *pstate)
 
 	while (1)
 	{
-		SpinLockAcquire(&pstate->mutex);
-		state = pstate->state;
-		if (pstate->state == BM_INITIAL)
-			pstate->state = BM_INPROGRESS;
-		SpinLockRelease(&pstate->mutex);
+		state = BM_INITIAL;
+		pg_atomic_compare_exchange_u32(&pstate->state, &state, BM_INPROGRESS);
 
 		/* Exit if bitmap is done, or if we're the leader. */
 		if (state != BM_INPROGRESS)
@@ -538,9 +531,7 @@ ExecBitmapHeapInitializeDSM(BitmapHeapScanState *node,
 
 	pstate->tbmiterator = 0;
 
-	/* Initialize the mutex */
-	SpinLockInit(&pstate->mutex);
-	pstate->state = BM_INITIAL;
+	pg_atomic_init_u32(&pstate->state, BM_INITIAL);
 
 	ConditionVariableInit(&pstate->cv);
 
@@ -565,7 +556,7 @@ ExecBitmapHeapReInitializeDSM(BitmapHeapScanState *node,
 	if (dsa == NULL)
 		return;
 
-	pstate->state = BM_INITIAL;
+	pg_atomic_write_u32(&pstate->state, BM_INITIAL);
 
 	if (DsaPointerIsValid(pstate->tbmiterator))
 		tbm_free_shared_area(dsa, pstate->tbmiterator);
-- 
2.50.1 (Apple Git-155)


--Ot5x3ffkWEuxilWO
Content-Type: text/plain; charset=us-ascii
Content-Disposition: attachment;
	filename=v1-0003-convert-FixedParallelState-last_xlog_end-to-an-at.patch



^ permalink  raw  reply  [nested|flat] 440+ messages in thread

* [PATCH v1 2/8] convert ParallelBitmapHeapState->state to an atomic
@ 2026-07-09 18:38 Nathan Bossart <nathan@postgresql.org>
  0 siblings, 0 replies; 440+ messages in thread

From: Nathan Bossart @ 2026-07-09 18:38 UTC (permalink / raw)

---
 src/backend/executor/nodeBitmapHeapscan.c | 21 ++++++---------------
 1 file changed, 6 insertions(+), 15 deletions(-)

diff --git a/src/backend/executor/nodeBitmapHeapscan.c b/src/backend/executor/nodeBitmapHeapscan.c
index 83d6478bc2b..f2bb487bf10 100644
--- a/src/backend/executor/nodeBitmapHeapscan.c
+++ b/src/backend/executor/nodeBitmapHeapscan.c
@@ -79,7 +79,6 @@ typedef enum
 /* ----------------
  *	 ParallelBitmapHeapState information
  *		tbmiterator				iterator for scanning current pages
- *		mutex					mutual exclusion for state
  *		state					current state of the TIDBitmap
  *		cv						conditional wait variable
  * ----------------
@@ -87,8 +86,7 @@ typedef enum
 typedef struct ParallelBitmapHeapState
 {
 	dsa_pointer tbmiterator;
-	slock_t		mutex;
-	SharedBitmapState state;
+	pg_atomic_uint32 state;
 	ConditionVariable cv;
 } ParallelBitmapHeapState;
 
@@ -228,9 +226,7 @@ BitmapHeapNext(BitmapHeapScanState *node)
 static inline void
 BitmapDoneInitializingSharedState(ParallelBitmapHeapState *pstate)
 {
-	SpinLockAcquire(&pstate->mutex);
-	pstate->state = BM_FINISHED;
-	SpinLockRelease(&pstate->mutex);
+	pg_atomic_write_membarrier_u32(&pstate->state, BM_FINISHED);
 	ConditionVariableBroadcast(&pstate->cv);
 }
 
@@ -480,11 +476,8 @@ BitmapShouldInitializeSharedState(ParallelBitmapHeapState *pstate)
 
 	while (1)
 	{
-		SpinLockAcquire(&pstate->mutex);
-		state = pstate->state;
-		if (pstate->state == BM_INITIAL)
-			pstate->state = BM_INPROGRESS;
-		SpinLockRelease(&pstate->mutex);
+		state = BM_INITIAL;
+		pg_atomic_compare_exchange_u32(&pstate->state, &state, BM_INPROGRESS);
 
 		/* Exit if bitmap is done, or if we're the leader. */
 		if (state != BM_INPROGRESS)
@@ -538,9 +531,7 @@ ExecBitmapHeapInitializeDSM(BitmapHeapScanState *node,
 
 	pstate->tbmiterator = 0;
 
-	/* Initialize the mutex */
-	SpinLockInit(&pstate->mutex);
-	pstate->state = BM_INITIAL;
+	pg_atomic_init_u32(&pstate->state, BM_INITIAL);
 
 	ConditionVariableInit(&pstate->cv);
 
@@ -565,7 +556,7 @@ ExecBitmapHeapReInitializeDSM(BitmapHeapScanState *node,
 	if (dsa == NULL)
 		return;
 
-	pstate->state = BM_INITIAL;
+	pg_atomic_write_u32(&pstate->state, BM_INITIAL);
 
 	if (DsaPointerIsValid(pstate->tbmiterator))
 		tbm_free_shared_area(dsa, pstate->tbmiterator);
-- 
2.50.1 (Apple Git-155)


--Ot5x3ffkWEuxilWO
Content-Type: text/plain; charset=us-ascii
Content-Disposition: attachment;
	filename=v1-0003-convert-FixedParallelState-last_xlog_end-to-an-at.patch



^ permalink  raw  reply  [nested|flat] 440+ messages in thread

* [PATCH v1 2/8] convert ParallelBitmapHeapState->state to an atomic
@ 2026-07-09 18:38 Nathan Bossart <nathan@postgresql.org>
  0 siblings, 0 replies; 440+ messages in thread

From: Nathan Bossart @ 2026-07-09 18:38 UTC (permalink / raw)

---
 src/backend/executor/nodeBitmapHeapscan.c | 21 ++++++---------------
 1 file changed, 6 insertions(+), 15 deletions(-)

diff --git a/src/backend/executor/nodeBitmapHeapscan.c b/src/backend/executor/nodeBitmapHeapscan.c
index 83d6478bc2b..f2bb487bf10 100644
--- a/src/backend/executor/nodeBitmapHeapscan.c
+++ b/src/backend/executor/nodeBitmapHeapscan.c
@@ -79,7 +79,6 @@ typedef enum
 /* ----------------
  *	 ParallelBitmapHeapState information
  *		tbmiterator				iterator for scanning current pages
- *		mutex					mutual exclusion for state
  *		state					current state of the TIDBitmap
  *		cv						conditional wait variable
  * ----------------
@@ -87,8 +86,7 @@ typedef enum
 typedef struct ParallelBitmapHeapState
 {
 	dsa_pointer tbmiterator;
-	slock_t		mutex;
-	SharedBitmapState state;
+	pg_atomic_uint32 state;
 	ConditionVariable cv;
 } ParallelBitmapHeapState;
 
@@ -228,9 +226,7 @@ BitmapHeapNext(BitmapHeapScanState *node)
 static inline void
 BitmapDoneInitializingSharedState(ParallelBitmapHeapState *pstate)
 {
-	SpinLockAcquire(&pstate->mutex);
-	pstate->state = BM_FINISHED;
-	SpinLockRelease(&pstate->mutex);
+	pg_atomic_write_membarrier_u32(&pstate->state, BM_FINISHED);
 	ConditionVariableBroadcast(&pstate->cv);
 }
 
@@ -480,11 +476,8 @@ BitmapShouldInitializeSharedState(ParallelBitmapHeapState *pstate)
 
 	while (1)
 	{
-		SpinLockAcquire(&pstate->mutex);
-		state = pstate->state;
-		if (pstate->state == BM_INITIAL)
-			pstate->state = BM_INPROGRESS;
-		SpinLockRelease(&pstate->mutex);
+		state = BM_INITIAL;
+		pg_atomic_compare_exchange_u32(&pstate->state, &state, BM_INPROGRESS);
 
 		/* Exit if bitmap is done, or if we're the leader. */
 		if (state != BM_INPROGRESS)
@@ -538,9 +531,7 @@ ExecBitmapHeapInitializeDSM(BitmapHeapScanState *node,
 
 	pstate->tbmiterator = 0;
 
-	/* Initialize the mutex */
-	SpinLockInit(&pstate->mutex);
-	pstate->state = BM_INITIAL;
+	pg_atomic_init_u32(&pstate->state, BM_INITIAL);
 
 	ConditionVariableInit(&pstate->cv);
 
@@ -565,7 +556,7 @@ ExecBitmapHeapReInitializeDSM(BitmapHeapScanState *node,
 	if (dsa == NULL)
 		return;
 
-	pstate->state = BM_INITIAL;
+	pg_atomic_write_u32(&pstate->state, BM_INITIAL);
 
 	if (DsaPointerIsValid(pstate->tbmiterator))
 		tbm_free_shared_area(dsa, pstate->tbmiterator);
-- 
2.50.1 (Apple Git-155)


--Ot5x3ffkWEuxilWO
Content-Type: text/plain; charset=us-ascii
Content-Disposition: attachment;
	filename=v1-0003-convert-FixedParallelState-last_xlog_end-to-an-at.patch



^ permalink  raw  reply  [nested|flat] 440+ messages in thread

* [PATCH v1 2/8] convert ParallelBitmapHeapState->state to an atomic
@ 2026-07-09 18:38 Nathan Bossart <nathan@postgresql.org>
  0 siblings, 0 replies; 440+ messages in thread

From: Nathan Bossart @ 2026-07-09 18:38 UTC (permalink / raw)

---
 src/backend/executor/nodeBitmapHeapscan.c | 21 ++++++---------------
 1 file changed, 6 insertions(+), 15 deletions(-)

diff --git a/src/backend/executor/nodeBitmapHeapscan.c b/src/backend/executor/nodeBitmapHeapscan.c
index 83d6478bc2b..f2bb487bf10 100644
--- a/src/backend/executor/nodeBitmapHeapscan.c
+++ b/src/backend/executor/nodeBitmapHeapscan.c
@@ -79,7 +79,6 @@ typedef enum
 /* ----------------
  *	 ParallelBitmapHeapState information
  *		tbmiterator				iterator for scanning current pages
- *		mutex					mutual exclusion for state
  *		state					current state of the TIDBitmap
  *		cv						conditional wait variable
  * ----------------
@@ -87,8 +86,7 @@ typedef enum
 typedef struct ParallelBitmapHeapState
 {
 	dsa_pointer tbmiterator;
-	slock_t		mutex;
-	SharedBitmapState state;
+	pg_atomic_uint32 state;
 	ConditionVariable cv;
 } ParallelBitmapHeapState;
 
@@ -228,9 +226,7 @@ BitmapHeapNext(BitmapHeapScanState *node)
 static inline void
 BitmapDoneInitializingSharedState(ParallelBitmapHeapState *pstate)
 {
-	SpinLockAcquire(&pstate->mutex);
-	pstate->state = BM_FINISHED;
-	SpinLockRelease(&pstate->mutex);
+	pg_atomic_write_membarrier_u32(&pstate->state, BM_FINISHED);
 	ConditionVariableBroadcast(&pstate->cv);
 }
 
@@ -480,11 +476,8 @@ BitmapShouldInitializeSharedState(ParallelBitmapHeapState *pstate)
 
 	while (1)
 	{
-		SpinLockAcquire(&pstate->mutex);
-		state = pstate->state;
-		if (pstate->state == BM_INITIAL)
-			pstate->state = BM_INPROGRESS;
-		SpinLockRelease(&pstate->mutex);
+		state = BM_INITIAL;
+		pg_atomic_compare_exchange_u32(&pstate->state, &state, BM_INPROGRESS);
 
 		/* Exit if bitmap is done, or if we're the leader. */
 		if (state != BM_INPROGRESS)
@@ -538,9 +531,7 @@ ExecBitmapHeapInitializeDSM(BitmapHeapScanState *node,
 
 	pstate->tbmiterator = 0;
 
-	/* Initialize the mutex */
-	SpinLockInit(&pstate->mutex);
-	pstate->state = BM_INITIAL;
+	pg_atomic_init_u32(&pstate->state, BM_INITIAL);
 
 	ConditionVariableInit(&pstate->cv);
 
@@ -565,7 +556,7 @@ ExecBitmapHeapReInitializeDSM(BitmapHeapScanState *node,
 	if (dsa == NULL)
 		return;
 
-	pstate->state = BM_INITIAL;
+	pg_atomic_write_u32(&pstate->state, BM_INITIAL);
 
 	if (DsaPointerIsValid(pstate->tbmiterator))
 		tbm_free_shared_area(dsa, pstate->tbmiterator);
-- 
2.50.1 (Apple Git-155)


--Ot5x3ffkWEuxilWO
Content-Type: text/plain; charset=us-ascii
Content-Disposition: attachment;
	filename=v1-0003-convert-FixedParallelState-last_xlog_end-to-an-at.patch



^ permalink  raw  reply  [nested|flat] 440+ messages in thread

* [PATCH v1 2/8] convert ParallelBitmapHeapState->state to an atomic
@ 2026-07-09 18:38 Nathan Bossart <nathan@postgresql.org>
  0 siblings, 0 replies; 440+ messages in thread

From: Nathan Bossart @ 2026-07-09 18:38 UTC (permalink / raw)

---
 src/backend/executor/nodeBitmapHeapscan.c | 21 ++++++---------------
 1 file changed, 6 insertions(+), 15 deletions(-)

diff --git a/src/backend/executor/nodeBitmapHeapscan.c b/src/backend/executor/nodeBitmapHeapscan.c
index 83d6478bc2b..f2bb487bf10 100644
--- a/src/backend/executor/nodeBitmapHeapscan.c
+++ b/src/backend/executor/nodeBitmapHeapscan.c
@@ -79,7 +79,6 @@ typedef enum
 /* ----------------
  *	 ParallelBitmapHeapState information
  *		tbmiterator				iterator for scanning current pages
- *		mutex					mutual exclusion for state
  *		state					current state of the TIDBitmap
  *		cv						conditional wait variable
  * ----------------
@@ -87,8 +86,7 @@ typedef enum
 typedef struct ParallelBitmapHeapState
 {
 	dsa_pointer tbmiterator;
-	slock_t		mutex;
-	SharedBitmapState state;
+	pg_atomic_uint32 state;
 	ConditionVariable cv;
 } ParallelBitmapHeapState;
 
@@ -228,9 +226,7 @@ BitmapHeapNext(BitmapHeapScanState *node)
 static inline void
 BitmapDoneInitializingSharedState(ParallelBitmapHeapState *pstate)
 {
-	SpinLockAcquire(&pstate->mutex);
-	pstate->state = BM_FINISHED;
-	SpinLockRelease(&pstate->mutex);
+	pg_atomic_write_membarrier_u32(&pstate->state, BM_FINISHED);
 	ConditionVariableBroadcast(&pstate->cv);
 }
 
@@ -480,11 +476,8 @@ BitmapShouldInitializeSharedState(ParallelBitmapHeapState *pstate)
 
 	while (1)
 	{
-		SpinLockAcquire(&pstate->mutex);
-		state = pstate->state;
-		if (pstate->state == BM_INITIAL)
-			pstate->state = BM_INPROGRESS;
-		SpinLockRelease(&pstate->mutex);
+		state = BM_INITIAL;
+		pg_atomic_compare_exchange_u32(&pstate->state, &state, BM_INPROGRESS);
 
 		/* Exit if bitmap is done, or if we're the leader. */
 		if (state != BM_INPROGRESS)
@@ -538,9 +531,7 @@ ExecBitmapHeapInitializeDSM(BitmapHeapScanState *node,
 
 	pstate->tbmiterator = 0;
 
-	/* Initialize the mutex */
-	SpinLockInit(&pstate->mutex);
-	pstate->state = BM_INITIAL;
+	pg_atomic_init_u32(&pstate->state, BM_INITIAL);
 
 	ConditionVariableInit(&pstate->cv);
 
@@ -565,7 +556,7 @@ ExecBitmapHeapReInitializeDSM(BitmapHeapScanState *node,
 	if (dsa == NULL)
 		return;
 
-	pstate->state = BM_INITIAL;
+	pg_atomic_write_u32(&pstate->state, BM_INITIAL);
 
 	if (DsaPointerIsValid(pstate->tbmiterator))
 		tbm_free_shared_area(dsa, pstate->tbmiterator);
-- 
2.50.1 (Apple Git-155)


--Ot5x3ffkWEuxilWO
Content-Type: text/plain; charset=us-ascii
Content-Disposition: attachment;
	filename=v1-0003-convert-FixedParallelState-last_xlog_end-to-an-at.patch



^ permalink  raw  reply  [nested|flat] 440+ messages in thread

* [PATCH v1 2/8] convert ParallelBitmapHeapState->state to an atomic
@ 2026-07-09 18:38 Nathan Bossart <nathan@postgresql.org>
  0 siblings, 0 replies; 440+ messages in thread

From: Nathan Bossart @ 2026-07-09 18:38 UTC (permalink / raw)

---
 src/backend/executor/nodeBitmapHeapscan.c | 21 ++++++---------------
 1 file changed, 6 insertions(+), 15 deletions(-)

diff --git a/src/backend/executor/nodeBitmapHeapscan.c b/src/backend/executor/nodeBitmapHeapscan.c
index 83d6478bc2b..f2bb487bf10 100644
--- a/src/backend/executor/nodeBitmapHeapscan.c
+++ b/src/backend/executor/nodeBitmapHeapscan.c
@@ -79,7 +79,6 @@ typedef enum
 /* ----------------
  *	 ParallelBitmapHeapState information
  *		tbmiterator				iterator for scanning current pages
- *		mutex					mutual exclusion for state
  *		state					current state of the TIDBitmap
  *		cv						conditional wait variable
  * ----------------
@@ -87,8 +86,7 @@ typedef enum
 typedef struct ParallelBitmapHeapState
 {
 	dsa_pointer tbmiterator;
-	slock_t		mutex;
-	SharedBitmapState state;
+	pg_atomic_uint32 state;
 	ConditionVariable cv;
 } ParallelBitmapHeapState;
 
@@ -228,9 +226,7 @@ BitmapHeapNext(BitmapHeapScanState *node)
 static inline void
 BitmapDoneInitializingSharedState(ParallelBitmapHeapState *pstate)
 {
-	SpinLockAcquire(&pstate->mutex);
-	pstate->state = BM_FINISHED;
-	SpinLockRelease(&pstate->mutex);
+	pg_atomic_write_membarrier_u32(&pstate->state, BM_FINISHED);
 	ConditionVariableBroadcast(&pstate->cv);
 }
 
@@ -480,11 +476,8 @@ BitmapShouldInitializeSharedState(ParallelBitmapHeapState *pstate)
 
 	while (1)
 	{
-		SpinLockAcquire(&pstate->mutex);
-		state = pstate->state;
-		if (pstate->state == BM_INITIAL)
-			pstate->state = BM_INPROGRESS;
-		SpinLockRelease(&pstate->mutex);
+		state = BM_INITIAL;
+		pg_atomic_compare_exchange_u32(&pstate->state, &state, BM_INPROGRESS);
 
 		/* Exit if bitmap is done, or if we're the leader. */
 		if (state != BM_INPROGRESS)
@@ -538,9 +531,7 @@ ExecBitmapHeapInitializeDSM(BitmapHeapScanState *node,
 
 	pstate->tbmiterator = 0;
 
-	/* Initialize the mutex */
-	SpinLockInit(&pstate->mutex);
-	pstate->state = BM_INITIAL;
+	pg_atomic_init_u32(&pstate->state, BM_INITIAL);
 
 	ConditionVariableInit(&pstate->cv);
 
@@ -565,7 +556,7 @@ ExecBitmapHeapReInitializeDSM(BitmapHeapScanState *node,
 	if (dsa == NULL)
 		return;
 
-	pstate->state = BM_INITIAL;
+	pg_atomic_write_u32(&pstate->state, BM_INITIAL);
 
 	if (DsaPointerIsValid(pstate->tbmiterator))
 		tbm_free_shared_area(dsa, pstate->tbmiterator);
-- 
2.50.1 (Apple Git-155)


--Ot5x3ffkWEuxilWO
Content-Type: text/plain; charset=us-ascii
Content-Disposition: attachment;
	filename=v1-0003-convert-FixedParallelState-last_xlog_end-to-an-at.patch



^ permalink  raw  reply  [nested|flat] 440+ messages in thread

* [PATCH v1 2/8] convert ParallelBitmapHeapState->state to an atomic
@ 2026-07-09 18:38 Nathan Bossart <nathan@postgresql.org>
  0 siblings, 0 replies; 440+ messages in thread

From: Nathan Bossart @ 2026-07-09 18:38 UTC (permalink / raw)

---
 src/backend/executor/nodeBitmapHeapscan.c | 21 ++++++---------------
 1 file changed, 6 insertions(+), 15 deletions(-)

diff --git a/src/backend/executor/nodeBitmapHeapscan.c b/src/backend/executor/nodeBitmapHeapscan.c
index 83d6478bc2b..f2bb487bf10 100644
--- a/src/backend/executor/nodeBitmapHeapscan.c
+++ b/src/backend/executor/nodeBitmapHeapscan.c
@@ -79,7 +79,6 @@ typedef enum
 /* ----------------
  *	 ParallelBitmapHeapState information
  *		tbmiterator				iterator for scanning current pages
- *		mutex					mutual exclusion for state
  *		state					current state of the TIDBitmap
  *		cv						conditional wait variable
  * ----------------
@@ -87,8 +86,7 @@ typedef enum
 typedef struct ParallelBitmapHeapState
 {
 	dsa_pointer tbmiterator;
-	slock_t		mutex;
-	SharedBitmapState state;
+	pg_atomic_uint32 state;
 	ConditionVariable cv;
 } ParallelBitmapHeapState;
 
@@ -228,9 +226,7 @@ BitmapHeapNext(BitmapHeapScanState *node)
 static inline void
 BitmapDoneInitializingSharedState(ParallelBitmapHeapState *pstate)
 {
-	SpinLockAcquire(&pstate->mutex);
-	pstate->state = BM_FINISHED;
-	SpinLockRelease(&pstate->mutex);
+	pg_atomic_write_membarrier_u32(&pstate->state, BM_FINISHED);
 	ConditionVariableBroadcast(&pstate->cv);
 }
 
@@ -480,11 +476,8 @@ BitmapShouldInitializeSharedState(ParallelBitmapHeapState *pstate)
 
 	while (1)
 	{
-		SpinLockAcquire(&pstate->mutex);
-		state = pstate->state;
-		if (pstate->state == BM_INITIAL)
-			pstate->state = BM_INPROGRESS;
-		SpinLockRelease(&pstate->mutex);
+		state = BM_INITIAL;
+		pg_atomic_compare_exchange_u32(&pstate->state, &state, BM_INPROGRESS);
 
 		/* Exit if bitmap is done, or if we're the leader. */
 		if (state != BM_INPROGRESS)
@@ -538,9 +531,7 @@ ExecBitmapHeapInitializeDSM(BitmapHeapScanState *node,
 
 	pstate->tbmiterator = 0;
 
-	/* Initialize the mutex */
-	SpinLockInit(&pstate->mutex);
-	pstate->state = BM_INITIAL;
+	pg_atomic_init_u32(&pstate->state, BM_INITIAL);
 
 	ConditionVariableInit(&pstate->cv);
 
@@ -565,7 +556,7 @@ ExecBitmapHeapReInitializeDSM(BitmapHeapScanState *node,
 	if (dsa == NULL)
 		return;
 
-	pstate->state = BM_INITIAL;
+	pg_atomic_write_u32(&pstate->state, BM_INITIAL);
 
 	if (DsaPointerIsValid(pstate->tbmiterator))
 		tbm_free_shared_area(dsa, pstate->tbmiterator);
-- 
2.50.1 (Apple Git-155)


--Ot5x3ffkWEuxilWO
Content-Type: text/plain; charset=us-ascii
Content-Disposition: attachment;
	filename=v1-0003-convert-FixedParallelState-last_xlog_end-to-an-at.patch



^ permalink  raw  reply  [nested|flat] 440+ messages in thread

* [PATCH v2 2/9] convert ParallelBitmapHeapState->state to an atomic
@ 2026-07-09 18:38 Nathan Bossart <nathan@postgresql.org>
  0 siblings, 0 replies; 440+ messages in thread

From: Nathan Bossart @ 2026-07-09 18:38 UTC (permalink / raw)

---
 src/backend/executor/nodeBitmapHeapscan.c | 23 +++++++----------------
 1 file changed, 7 insertions(+), 16 deletions(-)

diff --git a/src/backend/executor/nodeBitmapHeapscan.c b/src/backend/executor/nodeBitmapHeapscan.c
index 83d6478bc2b..a9e83f30687 100644
--- a/src/backend/executor/nodeBitmapHeapscan.c
+++ b/src/backend/executor/nodeBitmapHeapscan.c
@@ -79,7 +79,6 @@ typedef enum
 /* ----------------
  *	 ParallelBitmapHeapState information
  *		tbmiterator				iterator for scanning current pages
- *		mutex					mutual exclusion for state
  *		state					current state of the TIDBitmap
  *		cv						conditional wait variable
  * ----------------
@@ -87,8 +86,7 @@ typedef enum
 typedef struct ParallelBitmapHeapState
 {
 	dsa_pointer tbmiterator;
-	slock_t		mutex;
-	SharedBitmapState state;
+	pg_atomic_uint32 state;
 	ConditionVariable cv;
 } ParallelBitmapHeapState;
 
@@ -228,9 +226,7 @@ BitmapHeapNext(BitmapHeapScanState *node)
 static inline void
 BitmapDoneInitializingSharedState(ParallelBitmapHeapState *pstate)
 {
-	SpinLockAcquire(&pstate->mutex);
-	pstate->state = BM_FINISHED;
-	SpinLockRelease(&pstate->mutex);
+	pg_atomic_write_membarrier_u32(&pstate->state, BM_FINISHED);
 	ConditionVariableBroadcast(&pstate->cv);
 }
 
@@ -476,15 +472,12 @@ ExecInitBitmapHeapScan(BitmapHeapScan *node, EState *estate, int eflags)
 static bool
 BitmapShouldInitializeSharedState(ParallelBitmapHeapState *pstate)
 {
-	SharedBitmapState state;
+	uint32		state;
 
 	while (1)
 	{
-		SpinLockAcquire(&pstate->mutex);
-		state = pstate->state;
-		if (pstate->state == BM_INITIAL)
-			pstate->state = BM_INPROGRESS;
-		SpinLockRelease(&pstate->mutex);
+		state = BM_INITIAL;
+		pg_atomic_compare_exchange_u32(&pstate->state, &state, BM_INPROGRESS);
 
 		/* Exit if bitmap is done, or if we're the leader. */
 		if (state != BM_INPROGRESS)
@@ -538,9 +531,7 @@ ExecBitmapHeapInitializeDSM(BitmapHeapScanState *node,
 
 	pstate->tbmiterator = 0;
 
-	/* Initialize the mutex */
-	SpinLockInit(&pstate->mutex);
-	pstate->state = BM_INITIAL;
+	pg_atomic_init_u32(&pstate->state, BM_INITIAL);
 
 	ConditionVariableInit(&pstate->cv);
 
@@ -565,7 +556,7 @@ ExecBitmapHeapReInitializeDSM(BitmapHeapScanState *node,
 	if (dsa == NULL)
 		return;
 
-	pstate->state = BM_INITIAL;
+	pg_atomic_write_u32(&pstate->state, BM_INITIAL);
 
 	if (DsaPointerIsValid(pstate->tbmiterator))
 		tbm_free_shared_area(dsa, pstate->tbmiterator);
-- 
2.50.1 (Apple Git-155)


--Xf36GNcW+0xZNily
Content-Type: text/plain; charset=us-ascii
Content-Disposition: attachment;
	filename=v2-0003-convert-FixedParallelState-last_xlog_end-to-an-at.patch



^ permalink  raw  reply  [nested|flat] 440+ messages in thread

* [PATCH v1 2/8] convert ParallelBitmapHeapState->state to an atomic
@ 2026-07-09 18:38 Nathan Bossart <nathan@postgresql.org>
  0 siblings, 0 replies; 440+ messages in thread

From: Nathan Bossart @ 2026-07-09 18:38 UTC (permalink / raw)

---
 src/backend/executor/nodeBitmapHeapscan.c | 21 ++++++---------------
 1 file changed, 6 insertions(+), 15 deletions(-)

diff --git a/src/backend/executor/nodeBitmapHeapscan.c b/src/backend/executor/nodeBitmapHeapscan.c
index 83d6478bc2b..f2bb487bf10 100644
--- a/src/backend/executor/nodeBitmapHeapscan.c
+++ b/src/backend/executor/nodeBitmapHeapscan.c
@@ -79,7 +79,6 @@ typedef enum
 /* ----------------
  *	 ParallelBitmapHeapState information
  *		tbmiterator				iterator for scanning current pages
- *		mutex					mutual exclusion for state
  *		state					current state of the TIDBitmap
  *		cv						conditional wait variable
  * ----------------
@@ -87,8 +86,7 @@ typedef enum
 typedef struct ParallelBitmapHeapState
 {
 	dsa_pointer tbmiterator;
-	slock_t		mutex;
-	SharedBitmapState state;
+	pg_atomic_uint32 state;
 	ConditionVariable cv;
 } ParallelBitmapHeapState;
 
@@ -228,9 +226,7 @@ BitmapHeapNext(BitmapHeapScanState *node)
 static inline void
 BitmapDoneInitializingSharedState(ParallelBitmapHeapState *pstate)
 {
-	SpinLockAcquire(&pstate->mutex);
-	pstate->state = BM_FINISHED;
-	SpinLockRelease(&pstate->mutex);
+	pg_atomic_write_membarrier_u32(&pstate->state, BM_FINISHED);
 	ConditionVariableBroadcast(&pstate->cv);
 }
 
@@ -480,11 +476,8 @@ BitmapShouldInitializeSharedState(ParallelBitmapHeapState *pstate)
 
 	while (1)
 	{
-		SpinLockAcquire(&pstate->mutex);
-		state = pstate->state;
-		if (pstate->state == BM_INITIAL)
-			pstate->state = BM_INPROGRESS;
-		SpinLockRelease(&pstate->mutex);
+		state = BM_INITIAL;
+		pg_atomic_compare_exchange_u32(&pstate->state, &state, BM_INPROGRESS);
 
 		/* Exit if bitmap is done, or if we're the leader. */
 		if (state != BM_INPROGRESS)
@@ -538,9 +531,7 @@ ExecBitmapHeapInitializeDSM(BitmapHeapScanState *node,
 
 	pstate->tbmiterator = 0;
 
-	/* Initialize the mutex */
-	SpinLockInit(&pstate->mutex);
-	pstate->state = BM_INITIAL;
+	pg_atomic_init_u32(&pstate->state, BM_INITIAL);
 
 	ConditionVariableInit(&pstate->cv);
 
@@ -565,7 +556,7 @@ ExecBitmapHeapReInitializeDSM(BitmapHeapScanState *node,
 	if (dsa == NULL)
 		return;
 
-	pstate->state = BM_INITIAL;
+	pg_atomic_write_u32(&pstate->state, BM_INITIAL);
 
 	if (DsaPointerIsValid(pstate->tbmiterator))
 		tbm_free_shared_area(dsa, pstate->tbmiterator);
-- 
2.50.1 (Apple Git-155)


--Ot5x3ffkWEuxilWO
Content-Type: text/plain; charset=us-ascii
Content-Disposition: attachment;
	filename=v1-0003-convert-FixedParallelState-last_xlog_end-to-an-at.patch



^ permalink  raw  reply  [nested|flat] 440+ messages in thread

* [PATCH v1 2/8] convert ParallelBitmapHeapState->state to an atomic
@ 2026-07-09 18:38 Nathan Bossart <nathan@postgresql.org>
  0 siblings, 0 replies; 440+ messages in thread

From: Nathan Bossart @ 2026-07-09 18:38 UTC (permalink / raw)

---
 src/backend/executor/nodeBitmapHeapscan.c | 21 ++++++---------------
 1 file changed, 6 insertions(+), 15 deletions(-)

diff --git a/src/backend/executor/nodeBitmapHeapscan.c b/src/backend/executor/nodeBitmapHeapscan.c
index 83d6478bc2b..f2bb487bf10 100644
--- a/src/backend/executor/nodeBitmapHeapscan.c
+++ b/src/backend/executor/nodeBitmapHeapscan.c
@@ -79,7 +79,6 @@ typedef enum
 /* ----------------
  *	 ParallelBitmapHeapState information
  *		tbmiterator				iterator for scanning current pages
- *		mutex					mutual exclusion for state
  *		state					current state of the TIDBitmap
  *		cv						conditional wait variable
  * ----------------
@@ -87,8 +86,7 @@ typedef enum
 typedef struct ParallelBitmapHeapState
 {
 	dsa_pointer tbmiterator;
-	slock_t		mutex;
-	SharedBitmapState state;
+	pg_atomic_uint32 state;
 	ConditionVariable cv;
 } ParallelBitmapHeapState;
 
@@ -228,9 +226,7 @@ BitmapHeapNext(BitmapHeapScanState *node)
 static inline void
 BitmapDoneInitializingSharedState(ParallelBitmapHeapState *pstate)
 {
-	SpinLockAcquire(&pstate->mutex);
-	pstate->state = BM_FINISHED;
-	SpinLockRelease(&pstate->mutex);
+	pg_atomic_write_membarrier_u32(&pstate->state, BM_FINISHED);
 	ConditionVariableBroadcast(&pstate->cv);
 }
 
@@ -480,11 +476,8 @@ BitmapShouldInitializeSharedState(ParallelBitmapHeapState *pstate)
 
 	while (1)
 	{
-		SpinLockAcquire(&pstate->mutex);
-		state = pstate->state;
-		if (pstate->state == BM_INITIAL)
-			pstate->state = BM_INPROGRESS;
-		SpinLockRelease(&pstate->mutex);
+		state = BM_INITIAL;
+		pg_atomic_compare_exchange_u32(&pstate->state, &state, BM_INPROGRESS);
 
 		/* Exit if bitmap is done, or if we're the leader. */
 		if (state != BM_INPROGRESS)
@@ -538,9 +531,7 @@ ExecBitmapHeapInitializeDSM(BitmapHeapScanState *node,
 
 	pstate->tbmiterator = 0;
 
-	/* Initialize the mutex */
-	SpinLockInit(&pstate->mutex);
-	pstate->state = BM_INITIAL;
+	pg_atomic_init_u32(&pstate->state, BM_INITIAL);
 
 	ConditionVariableInit(&pstate->cv);
 
@@ -565,7 +556,7 @@ ExecBitmapHeapReInitializeDSM(BitmapHeapScanState *node,
 	if (dsa == NULL)
 		return;
 
-	pstate->state = BM_INITIAL;
+	pg_atomic_write_u32(&pstate->state, BM_INITIAL);
 
 	if (DsaPointerIsValid(pstate->tbmiterator))
 		tbm_free_shared_area(dsa, pstate->tbmiterator);
-- 
2.50.1 (Apple Git-155)


--Ot5x3ffkWEuxilWO
Content-Type: text/plain; charset=us-ascii
Content-Disposition: attachment;
	filename=v1-0003-convert-FixedParallelState-last_xlog_end-to-an-at.patch



^ permalink  raw  reply  [nested|flat] 440+ messages in thread

* [PATCH v1 2/8] convert ParallelBitmapHeapState->state to an atomic
@ 2026-07-09 18:38 Nathan Bossart <nathan@postgresql.org>
  0 siblings, 0 replies; 440+ messages in thread

From: Nathan Bossart @ 2026-07-09 18:38 UTC (permalink / raw)

---
 src/backend/executor/nodeBitmapHeapscan.c | 21 ++++++---------------
 1 file changed, 6 insertions(+), 15 deletions(-)

diff --git a/src/backend/executor/nodeBitmapHeapscan.c b/src/backend/executor/nodeBitmapHeapscan.c
index 83d6478bc2b..f2bb487bf10 100644
--- a/src/backend/executor/nodeBitmapHeapscan.c
+++ b/src/backend/executor/nodeBitmapHeapscan.c
@@ -79,7 +79,6 @@ typedef enum
 /* ----------------
  *	 ParallelBitmapHeapState information
  *		tbmiterator				iterator for scanning current pages
- *		mutex					mutual exclusion for state
  *		state					current state of the TIDBitmap
  *		cv						conditional wait variable
  * ----------------
@@ -87,8 +86,7 @@ typedef enum
 typedef struct ParallelBitmapHeapState
 {
 	dsa_pointer tbmiterator;
-	slock_t		mutex;
-	SharedBitmapState state;
+	pg_atomic_uint32 state;
 	ConditionVariable cv;
 } ParallelBitmapHeapState;
 
@@ -228,9 +226,7 @@ BitmapHeapNext(BitmapHeapScanState *node)
 static inline void
 BitmapDoneInitializingSharedState(ParallelBitmapHeapState *pstate)
 {
-	SpinLockAcquire(&pstate->mutex);
-	pstate->state = BM_FINISHED;
-	SpinLockRelease(&pstate->mutex);
+	pg_atomic_write_membarrier_u32(&pstate->state, BM_FINISHED);
 	ConditionVariableBroadcast(&pstate->cv);
 }
 
@@ -480,11 +476,8 @@ BitmapShouldInitializeSharedState(ParallelBitmapHeapState *pstate)
 
 	while (1)
 	{
-		SpinLockAcquire(&pstate->mutex);
-		state = pstate->state;
-		if (pstate->state == BM_INITIAL)
-			pstate->state = BM_INPROGRESS;
-		SpinLockRelease(&pstate->mutex);
+		state = BM_INITIAL;
+		pg_atomic_compare_exchange_u32(&pstate->state, &state, BM_INPROGRESS);
 
 		/* Exit if bitmap is done, or if we're the leader. */
 		if (state != BM_INPROGRESS)
@@ -538,9 +531,7 @@ ExecBitmapHeapInitializeDSM(BitmapHeapScanState *node,
 
 	pstate->tbmiterator = 0;
 
-	/* Initialize the mutex */
-	SpinLockInit(&pstate->mutex);
-	pstate->state = BM_INITIAL;
+	pg_atomic_init_u32(&pstate->state, BM_INITIAL);
 
 	ConditionVariableInit(&pstate->cv);
 
@@ -565,7 +556,7 @@ ExecBitmapHeapReInitializeDSM(BitmapHeapScanState *node,
 	if (dsa == NULL)
 		return;
 
-	pstate->state = BM_INITIAL;
+	pg_atomic_write_u32(&pstate->state, BM_INITIAL);
 
 	if (DsaPointerIsValid(pstate->tbmiterator))
 		tbm_free_shared_area(dsa, pstate->tbmiterator);
-- 
2.50.1 (Apple Git-155)


--Ot5x3ffkWEuxilWO
Content-Type: text/plain; charset=us-ascii
Content-Disposition: attachment;
	filename=v1-0003-convert-FixedParallelState-last_xlog_end-to-an-at.patch



^ permalink  raw  reply  [nested|flat] 440+ messages in thread

* [PATCH v2 2/9] convert ParallelBitmapHeapState->state to an atomic
@ 2026-07-09 18:38 Nathan Bossart <nathan@postgresql.org>
  0 siblings, 0 replies; 440+ messages in thread

From: Nathan Bossart @ 2026-07-09 18:38 UTC (permalink / raw)

---
 src/backend/executor/nodeBitmapHeapscan.c | 23 +++++++----------------
 1 file changed, 7 insertions(+), 16 deletions(-)

diff --git a/src/backend/executor/nodeBitmapHeapscan.c b/src/backend/executor/nodeBitmapHeapscan.c
index 83d6478bc2b..a9e83f30687 100644
--- a/src/backend/executor/nodeBitmapHeapscan.c
+++ b/src/backend/executor/nodeBitmapHeapscan.c
@@ -79,7 +79,6 @@ typedef enum
 /* ----------------
  *	 ParallelBitmapHeapState information
  *		tbmiterator				iterator for scanning current pages
- *		mutex					mutual exclusion for state
  *		state					current state of the TIDBitmap
  *		cv						conditional wait variable
  * ----------------
@@ -87,8 +86,7 @@ typedef enum
 typedef struct ParallelBitmapHeapState
 {
 	dsa_pointer tbmiterator;
-	slock_t		mutex;
-	SharedBitmapState state;
+	pg_atomic_uint32 state;
 	ConditionVariable cv;
 } ParallelBitmapHeapState;
 
@@ -228,9 +226,7 @@ BitmapHeapNext(BitmapHeapScanState *node)
 static inline void
 BitmapDoneInitializingSharedState(ParallelBitmapHeapState *pstate)
 {
-	SpinLockAcquire(&pstate->mutex);
-	pstate->state = BM_FINISHED;
-	SpinLockRelease(&pstate->mutex);
+	pg_atomic_write_membarrier_u32(&pstate->state, BM_FINISHED);
 	ConditionVariableBroadcast(&pstate->cv);
 }
 
@@ -476,15 +472,12 @@ ExecInitBitmapHeapScan(BitmapHeapScan *node, EState *estate, int eflags)
 static bool
 BitmapShouldInitializeSharedState(ParallelBitmapHeapState *pstate)
 {
-	SharedBitmapState state;
+	uint32		state;
 
 	while (1)
 	{
-		SpinLockAcquire(&pstate->mutex);
-		state = pstate->state;
-		if (pstate->state == BM_INITIAL)
-			pstate->state = BM_INPROGRESS;
-		SpinLockRelease(&pstate->mutex);
+		state = BM_INITIAL;
+		pg_atomic_compare_exchange_u32(&pstate->state, &state, BM_INPROGRESS);
 
 		/* Exit if bitmap is done, or if we're the leader. */
 		if (state != BM_INPROGRESS)
@@ -538,9 +531,7 @@ ExecBitmapHeapInitializeDSM(BitmapHeapScanState *node,
 
 	pstate->tbmiterator = 0;
 
-	/* Initialize the mutex */
-	SpinLockInit(&pstate->mutex);
-	pstate->state = BM_INITIAL;
+	pg_atomic_init_u32(&pstate->state, BM_INITIAL);
 
 	ConditionVariableInit(&pstate->cv);
 
@@ -565,7 +556,7 @@ ExecBitmapHeapReInitializeDSM(BitmapHeapScanState *node,
 	if (dsa == NULL)
 		return;
 
-	pstate->state = BM_INITIAL;
+	pg_atomic_write_u32(&pstate->state, BM_INITIAL);
 
 	if (DsaPointerIsValid(pstate->tbmiterator))
 		tbm_free_shared_area(dsa, pstate->tbmiterator);
-- 
2.50.1 (Apple Git-155)


--Xf36GNcW+0xZNily
Content-Type: text/plain; charset=us-ascii
Content-Disposition: attachment;
	filename=v2-0003-convert-FixedParallelState-last_xlog_end-to-an-at.patch



^ permalink  raw  reply  [nested|flat] 440+ messages in thread

* [PATCH v1 2/8] convert ParallelBitmapHeapState->state to an atomic
@ 2026-07-09 18:38 Nathan Bossart <nathan@postgresql.org>
  0 siblings, 0 replies; 440+ messages in thread

From: Nathan Bossart @ 2026-07-09 18:38 UTC (permalink / raw)

---
 src/backend/executor/nodeBitmapHeapscan.c | 21 ++++++---------------
 1 file changed, 6 insertions(+), 15 deletions(-)

diff --git a/src/backend/executor/nodeBitmapHeapscan.c b/src/backend/executor/nodeBitmapHeapscan.c
index 83d6478bc2b..f2bb487bf10 100644
--- a/src/backend/executor/nodeBitmapHeapscan.c
+++ b/src/backend/executor/nodeBitmapHeapscan.c
@@ -79,7 +79,6 @@ typedef enum
 /* ----------------
  *	 ParallelBitmapHeapState information
  *		tbmiterator				iterator for scanning current pages
- *		mutex					mutual exclusion for state
  *		state					current state of the TIDBitmap
  *		cv						conditional wait variable
  * ----------------
@@ -87,8 +86,7 @@ typedef enum
 typedef struct ParallelBitmapHeapState
 {
 	dsa_pointer tbmiterator;
-	slock_t		mutex;
-	SharedBitmapState state;
+	pg_atomic_uint32 state;
 	ConditionVariable cv;
 } ParallelBitmapHeapState;
 
@@ -228,9 +226,7 @@ BitmapHeapNext(BitmapHeapScanState *node)
 static inline void
 BitmapDoneInitializingSharedState(ParallelBitmapHeapState *pstate)
 {
-	SpinLockAcquire(&pstate->mutex);
-	pstate->state = BM_FINISHED;
-	SpinLockRelease(&pstate->mutex);
+	pg_atomic_write_membarrier_u32(&pstate->state, BM_FINISHED);
 	ConditionVariableBroadcast(&pstate->cv);
 }
 
@@ -480,11 +476,8 @@ BitmapShouldInitializeSharedState(ParallelBitmapHeapState *pstate)
 
 	while (1)
 	{
-		SpinLockAcquire(&pstate->mutex);
-		state = pstate->state;
-		if (pstate->state == BM_INITIAL)
-			pstate->state = BM_INPROGRESS;
-		SpinLockRelease(&pstate->mutex);
+		state = BM_INITIAL;
+		pg_atomic_compare_exchange_u32(&pstate->state, &state, BM_INPROGRESS);
 
 		/* Exit if bitmap is done, or if we're the leader. */
 		if (state != BM_INPROGRESS)
@@ -538,9 +531,7 @@ ExecBitmapHeapInitializeDSM(BitmapHeapScanState *node,
 
 	pstate->tbmiterator = 0;
 
-	/* Initialize the mutex */
-	SpinLockInit(&pstate->mutex);
-	pstate->state = BM_INITIAL;
+	pg_atomic_init_u32(&pstate->state, BM_INITIAL);
 
 	ConditionVariableInit(&pstate->cv);
 
@@ -565,7 +556,7 @@ ExecBitmapHeapReInitializeDSM(BitmapHeapScanState *node,
 	if (dsa == NULL)
 		return;
 
-	pstate->state = BM_INITIAL;
+	pg_atomic_write_u32(&pstate->state, BM_INITIAL);
 
 	if (DsaPointerIsValid(pstate->tbmiterator))
 		tbm_free_shared_area(dsa, pstate->tbmiterator);
-- 
2.50.1 (Apple Git-155)


--Ot5x3ffkWEuxilWO
Content-Type: text/plain; charset=us-ascii
Content-Disposition: attachment;
	filename=v1-0003-convert-FixedParallelState-last_xlog_end-to-an-at.patch



^ permalink  raw  reply  [nested|flat] 440+ messages in thread

* [PATCH v1 2/8] convert ParallelBitmapHeapState->state to an atomic
@ 2026-07-09 18:38 Nathan Bossart <nathan@postgresql.org>
  0 siblings, 0 replies; 440+ messages in thread

From: Nathan Bossart @ 2026-07-09 18:38 UTC (permalink / raw)

---
 src/backend/executor/nodeBitmapHeapscan.c | 21 ++++++---------------
 1 file changed, 6 insertions(+), 15 deletions(-)

diff --git a/src/backend/executor/nodeBitmapHeapscan.c b/src/backend/executor/nodeBitmapHeapscan.c
index 83d6478bc2b..f2bb487bf10 100644
--- a/src/backend/executor/nodeBitmapHeapscan.c
+++ b/src/backend/executor/nodeBitmapHeapscan.c
@@ -79,7 +79,6 @@ typedef enum
 /* ----------------
  *	 ParallelBitmapHeapState information
  *		tbmiterator				iterator for scanning current pages
- *		mutex					mutual exclusion for state
  *		state					current state of the TIDBitmap
  *		cv						conditional wait variable
  * ----------------
@@ -87,8 +86,7 @@ typedef enum
 typedef struct ParallelBitmapHeapState
 {
 	dsa_pointer tbmiterator;
-	slock_t		mutex;
-	SharedBitmapState state;
+	pg_atomic_uint32 state;
 	ConditionVariable cv;
 } ParallelBitmapHeapState;
 
@@ -228,9 +226,7 @@ BitmapHeapNext(BitmapHeapScanState *node)
 static inline void
 BitmapDoneInitializingSharedState(ParallelBitmapHeapState *pstate)
 {
-	SpinLockAcquire(&pstate->mutex);
-	pstate->state = BM_FINISHED;
-	SpinLockRelease(&pstate->mutex);
+	pg_atomic_write_membarrier_u32(&pstate->state, BM_FINISHED);
 	ConditionVariableBroadcast(&pstate->cv);
 }
 
@@ -480,11 +476,8 @@ BitmapShouldInitializeSharedState(ParallelBitmapHeapState *pstate)
 
 	while (1)
 	{
-		SpinLockAcquire(&pstate->mutex);
-		state = pstate->state;
-		if (pstate->state == BM_INITIAL)
-			pstate->state = BM_INPROGRESS;
-		SpinLockRelease(&pstate->mutex);
+		state = BM_INITIAL;
+		pg_atomic_compare_exchange_u32(&pstate->state, &state, BM_INPROGRESS);
 
 		/* Exit if bitmap is done, or if we're the leader. */
 		if (state != BM_INPROGRESS)
@@ -538,9 +531,7 @@ ExecBitmapHeapInitializeDSM(BitmapHeapScanState *node,
 
 	pstate->tbmiterator = 0;
 
-	/* Initialize the mutex */
-	SpinLockInit(&pstate->mutex);
-	pstate->state = BM_INITIAL;
+	pg_atomic_init_u32(&pstate->state, BM_INITIAL);
 
 	ConditionVariableInit(&pstate->cv);
 
@@ -565,7 +556,7 @@ ExecBitmapHeapReInitializeDSM(BitmapHeapScanState *node,
 	if (dsa == NULL)
 		return;
 
-	pstate->state = BM_INITIAL;
+	pg_atomic_write_u32(&pstate->state, BM_INITIAL);
 
 	if (DsaPointerIsValid(pstate->tbmiterator))
 		tbm_free_shared_area(dsa, pstate->tbmiterator);
-- 
2.50.1 (Apple Git-155)


--Ot5x3ffkWEuxilWO
Content-Type: text/plain; charset=us-ascii
Content-Disposition: attachment;
	filename=v1-0003-convert-FixedParallelState-last_xlog_end-to-an-at.patch



^ permalink  raw  reply  [nested|flat] 440+ messages in thread

* [PATCH v2 2/9] convert ParallelBitmapHeapState->state to an atomic
@ 2026-07-09 18:38 Nathan Bossart <nathan@postgresql.org>
  0 siblings, 0 replies; 440+ messages in thread

From: Nathan Bossart @ 2026-07-09 18:38 UTC (permalink / raw)

---
 src/backend/executor/nodeBitmapHeapscan.c | 23 +++++++----------------
 1 file changed, 7 insertions(+), 16 deletions(-)

diff --git a/src/backend/executor/nodeBitmapHeapscan.c b/src/backend/executor/nodeBitmapHeapscan.c
index 83d6478bc2b..a9e83f30687 100644
--- a/src/backend/executor/nodeBitmapHeapscan.c
+++ b/src/backend/executor/nodeBitmapHeapscan.c
@@ -79,7 +79,6 @@ typedef enum
 /* ----------------
  *	 ParallelBitmapHeapState information
  *		tbmiterator				iterator for scanning current pages
- *		mutex					mutual exclusion for state
  *		state					current state of the TIDBitmap
  *		cv						conditional wait variable
  * ----------------
@@ -87,8 +86,7 @@ typedef enum
 typedef struct ParallelBitmapHeapState
 {
 	dsa_pointer tbmiterator;
-	slock_t		mutex;
-	SharedBitmapState state;
+	pg_atomic_uint32 state;
 	ConditionVariable cv;
 } ParallelBitmapHeapState;
 
@@ -228,9 +226,7 @@ BitmapHeapNext(BitmapHeapScanState *node)
 static inline void
 BitmapDoneInitializingSharedState(ParallelBitmapHeapState *pstate)
 {
-	SpinLockAcquire(&pstate->mutex);
-	pstate->state = BM_FINISHED;
-	SpinLockRelease(&pstate->mutex);
+	pg_atomic_write_membarrier_u32(&pstate->state, BM_FINISHED);
 	ConditionVariableBroadcast(&pstate->cv);
 }
 
@@ -476,15 +472,12 @@ ExecInitBitmapHeapScan(BitmapHeapScan *node, EState *estate, int eflags)
 static bool
 BitmapShouldInitializeSharedState(ParallelBitmapHeapState *pstate)
 {
-	SharedBitmapState state;
+	uint32		state;
 
 	while (1)
 	{
-		SpinLockAcquire(&pstate->mutex);
-		state = pstate->state;
-		if (pstate->state == BM_INITIAL)
-			pstate->state = BM_INPROGRESS;
-		SpinLockRelease(&pstate->mutex);
+		state = BM_INITIAL;
+		pg_atomic_compare_exchange_u32(&pstate->state, &state, BM_INPROGRESS);
 
 		/* Exit if bitmap is done, or if we're the leader. */
 		if (state != BM_INPROGRESS)
@@ -538,9 +531,7 @@ ExecBitmapHeapInitializeDSM(BitmapHeapScanState *node,
 
 	pstate->tbmiterator = 0;
 
-	/* Initialize the mutex */
-	SpinLockInit(&pstate->mutex);
-	pstate->state = BM_INITIAL;
+	pg_atomic_init_u32(&pstate->state, BM_INITIAL);
 
 	ConditionVariableInit(&pstate->cv);
 
@@ -565,7 +556,7 @@ ExecBitmapHeapReInitializeDSM(BitmapHeapScanState *node,
 	if (dsa == NULL)
 		return;
 
-	pstate->state = BM_INITIAL;
+	pg_atomic_write_u32(&pstate->state, BM_INITIAL);
 
 	if (DsaPointerIsValid(pstate->tbmiterator))
 		tbm_free_shared_area(dsa, pstate->tbmiterator);
-- 
2.50.1 (Apple Git-155)


--Xf36GNcW+0xZNily
Content-Type: text/plain; charset=us-ascii
Content-Disposition: attachment;
	filename=v2-0003-convert-FixedParallelState-last_xlog_end-to-an-at.patch



^ permalink  raw  reply  [nested|flat] 440+ messages in thread

* [PATCH v2 2/9] convert ParallelBitmapHeapState->state to an atomic
@ 2026-07-09 18:38 Nathan Bossart <nathan@postgresql.org>
  0 siblings, 0 replies; 440+ messages in thread

From: Nathan Bossart @ 2026-07-09 18:38 UTC (permalink / raw)

---
 src/backend/executor/nodeBitmapHeapscan.c | 23 +++++++----------------
 1 file changed, 7 insertions(+), 16 deletions(-)

diff --git a/src/backend/executor/nodeBitmapHeapscan.c b/src/backend/executor/nodeBitmapHeapscan.c
index 83d6478bc2b..a9e83f30687 100644
--- a/src/backend/executor/nodeBitmapHeapscan.c
+++ b/src/backend/executor/nodeBitmapHeapscan.c
@@ -79,7 +79,6 @@ typedef enum
 /* ----------------
  *	 ParallelBitmapHeapState information
  *		tbmiterator				iterator for scanning current pages
- *		mutex					mutual exclusion for state
  *		state					current state of the TIDBitmap
  *		cv						conditional wait variable
  * ----------------
@@ -87,8 +86,7 @@ typedef enum
 typedef struct ParallelBitmapHeapState
 {
 	dsa_pointer tbmiterator;
-	slock_t		mutex;
-	SharedBitmapState state;
+	pg_atomic_uint32 state;
 	ConditionVariable cv;
 } ParallelBitmapHeapState;
 
@@ -228,9 +226,7 @@ BitmapHeapNext(BitmapHeapScanState *node)
 static inline void
 BitmapDoneInitializingSharedState(ParallelBitmapHeapState *pstate)
 {
-	SpinLockAcquire(&pstate->mutex);
-	pstate->state = BM_FINISHED;
-	SpinLockRelease(&pstate->mutex);
+	pg_atomic_write_membarrier_u32(&pstate->state, BM_FINISHED);
 	ConditionVariableBroadcast(&pstate->cv);
 }
 
@@ -476,15 +472,12 @@ ExecInitBitmapHeapScan(BitmapHeapScan *node, EState *estate, int eflags)
 static bool
 BitmapShouldInitializeSharedState(ParallelBitmapHeapState *pstate)
 {
-	SharedBitmapState state;
+	uint32		state;
 
 	while (1)
 	{
-		SpinLockAcquire(&pstate->mutex);
-		state = pstate->state;
-		if (pstate->state == BM_INITIAL)
-			pstate->state = BM_INPROGRESS;
-		SpinLockRelease(&pstate->mutex);
+		state = BM_INITIAL;
+		pg_atomic_compare_exchange_u32(&pstate->state, &state, BM_INPROGRESS);
 
 		/* Exit if bitmap is done, or if we're the leader. */
 		if (state != BM_INPROGRESS)
@@ -538,9 +531,7 @@ ExecBitmapHeapInitializeDSM(BitmapHeapScanState *node,
 
 	pstate->tbmiterator = 0;
 
-	/* Initialize the mutex */
-	SpinLockInit(&pstate->mutex);
-	pstate->state = BM_INITIAL;
+	pg_atomic_init_u32(&pstate->state, BM_INITIAL);
 
 	ConditionVariableInit(&pstate->cv);
 
@@ -565,7 +556,7 @@ ExecBitmapHeapReInitializeDSM(BitmapHeapScanState *node,
 	if (dsa == NULL)
 		return;
 
-	pstate->state = BM_INITIAL;
+	pg_atomic_write_u32(&pstate->state, BM_INITIAL);
 
 	if (DsaPointerIsValid(pstate->tbmiterator))
 		tbm_free_shared_area(dsa, pstate->tbmiterator);
-- 
2.50.1 (Apple Git-155)


--Xf36GNcW+0xZNily
Content-Type: text/plain; charset=us-ascii
Content-Disposition: attachment;
	filename=v2-0003-convert-FixedParallelState-last_xlog_end-to-an-at.patch



^ permalink  raw  reply  [nested|flat] 440+ messages in thread

* [PATCH v1 2/8] convert ParallelBitmapHeapState->state to an atomic
@ 2026-07-09 18:38 Nathan Bossart <nathan@postgresql.org>
  0 siblings, 0 replies; 440+ messages in thread

From: Nathan Bossart @ 2026-07-09 18:38 UTC (permalink / raw)

---
 src/backend/executor/nodeBitmapHeapscan.c | 21 ++++++---------------
 1 file changed, 6 insertions(+), 15 deletions(-)

diff --git a/src/backend/executor/nodeBitmapHeapscan.c b/src/backend/executor/nodeBitmapHeapscan.c
index 83d6478bc2b..f2bb487bf10 100644
--- a/src/backend/executor/nodeBitmapHeapscan.c
+++ b/src/backend/executor/nodeBitmapHeapscan.c
@@ -79,7 +79,6 @@ typedef enum
 /* ----------------
  *	 ParallelBitmapHeapState information
  *		tbmiterator				iterator for scanning current pages
- *		mutex					mutual exclusion for state
  *		state					current state of the TIDBitmap
  *		cv						conditional wait variable
  * ----------------
@@ -87,8 +86,7 @@ typedef enum
 typedef struct ParallelBitmapHeapState
 {
 	dsa_pointer tbmiterator;
-	slock_t		mutex;
-	SharedBitmapState state;
+	pg_atomic_uint32 state;
 	ConditionVariable cv;
 } ParallelBitmapHeapState;
 
@@ -228,9 +226,7 @@ BitmapHeapNext(BitmapHeapScanState *node)
 static inline void
 BitmapDoneInitializingSharedState(ParallelBitmapHeapState *pstate)
 {
-	SpinLockAcquire(&pstate->mutex);
-	pstate->state = BM_FINISHED;
-	SpinLockRelease(&pstate->mutex);
+	pg_atomic_write_membarrier_u32(&pstate->state, BM_FINISHED);
 	ConditionVariableBroadcast(&pstate->cv);
 }
 
@@ -480,11 +476,8 @@ BitmapShouldInitializeSharedState(ParallelBitmapHeapState *pstate)
 
 	while (1)
 	{
-		SpinLockAcquire(&pstate->mutex);
-		state = pstate->state;
-		if (pstate->state == BM_INITIAL)
-			pstate->state = BM_INPROGRESS;
-		SpinLockRelease(&pstate->mutex);
+		state = BM_INITIAL;
+		pg_atomic_compare_exchange_u32(&pstate->state, &state, BM_INPROGRESS);
 
 		/* Exit if bitmap is done, or if we're the leader. */
 		if (state != BM_INPROGRESS)
@@ -538,9 +531,7 @@ ExecBitmapHeapInitializeDSM(BitmapHeapScanState *node,
 
 	pstate->tbmiterator = 0;
 
-	/* Initialize the mutex */
-	SpinLockInit(&pstate->mutex);
-	pstate->state = BM_INITIAL;
+	pg_atomic_init_u32(&pstate->state, BM_INITIAL);
 
 	ConditionVariableInit(&pstate->cv);
 
@@ -565,7 +556,7 @@ ExecBitmapHeapReInitializeDSM(BitmapHeapScanState *node,
 	if (dsa == NULL)
 		return;
 
-	pstate->state = BM_INITIAL;
+	pg_atomic_write_u32(&pstate->state, BM_INITIAL);
 
 	if (DsaPointerIsValid(pstate->tbmiterator))
 		tbm_free_shared_area(dsa, pstate->tbmiterator);
-- 
2.50.1 (Apple Git-155)


--Ot5x3ffkWEuxilWO
Content-Type: text/plain; charset=us-ascii
Content-Disposition: attachment;
	filename=v1-0003-convert-FixedParallelState-last_xlog_end-to-an-at.patch



^ permalink  raw  reply  [nested|flat] 440+ messages in thread

* [PATCH v1 2/8] convert ParallelBitmapHeapState->state to an atomic
@ 2026-07-09 18:38 Nathan Bossart <nathan@postgresql.org>
  0 siblings, 0 replies; 440+ messages in thread

From: Nathan Bossart @ 2026-07-09 18:38 UTC (permalink / raw)

---
 src/backend/executor/nodeBitmapHeapscan.c | 21 ++++++---------------
 1 file changed, 6 insertions(+), 15 deletions(-)

diff --git a/src/backend/executor/nodeBitmapHeapscan.c b/src/backend/executor/nodeBitmapHeapscan.c
index 83d6478bc2b..f2bb487bf10 100644
--- a/src/backend/executor/nodeBitmapHeapscan.c
+++ b/src/backend/executor/nodeBitmapHeapscan.c
@@ -79,7 +79,6 @@ typedef enum
 /* ----------------
  *	 ParallelBitmapHeapState information
  *		tbmiterator				iterator for scanning current pages
- *		mutex					mutual exclusion for state
  *		state					current state of the TIDBitmap
  *		cv						conditional wait variable
  * ----------------
@@ -87,8 +86,7 @@ typedef enum
 typedef struct ParallelBitmapHeapState
 {
 	dsa_pointer tbmiterator;
-	slock_t		mutex;
-	SharedBitmapState state;
+	pg_atomic_uint32 state;
 	ConditionVariable cv;
 } ParallelBitmapHeapState;
 
@@ -228,9 +226,7 @@ BitmapHeapNext(BitmapHeapScanState *node)
 static inline void
 BitmapDoneInitializingSharedState(ParallelBitmapHeapState *pstate)
 {
-	SpinLockAcquire(&pstate->mutex);
-	pstate->state = BM_FINISHED;
-	SpinLockRelease(&pstate->mutex);
+	pg_atomic_write_membarrier_u32(&pstate->state, BM_FINISHED);
 	ConditionVariableBroadcast(&pstate->cv);
 }
 
@@ -480,11 +476,8 @@ BitmapShouldInitializeSharedState(ParallelBitmapHeapState *pstate)
 
 	while (1)
 	{
-		SpinLockAcquire(&pstate->mutex);
-		state = pstate->state;
-		if (pstate->state == BM_INITIAL)
-			pstate->state = BM_INPROGRESS;
-		SpinLockRelease(&pstate->mutex);
+		state = BM_INITIAL;
+		pg_atomic_compare_exchange_u32(&pstate->state, &state, BM_INPROGRESS);
 
 		/* Exit if bitmap is done, or if we're the leader. */
 		if (state != BM_INPROGRESS)
@@ -538,9 +531,7 @@ ExecBitmapHeapInitializeDSM(BitmapHeapScanState *node,
 
 	pstate->tbmiterator = 0;
 
-	/* Initialize the mutex */
-	SpinLockInit(&pstate->mutex);
-	pstate->state = BM_INITIAL;
+	pg_atomic_init_u32(&pstate->state, BM_INITIAL);
 
 	ConditionVariableInit(&pstate->cv);
 
@@ -565,7 +556,7 @@ ExecBitmapHeapReInitializeDSM(BitmapHeapScanState *node,
 	if (dsa == NULL)
 		return;
 
-	pstate->state = BM_INITIAL;
+	pg_atomic_write_u32(&pstate->state, BM_INITIAL);
 
 	if (DsaPointerIsValid(pstate->tbmiterator))
 		tbm_free_shared_area(dsa, pstate->tbmiterator);
-- 
2.50.1 (Apple Git-155)


--Ot5x3ffkWEuxilWO
Content-Type: text/plain; charset=us-ascii
Content-Disposition: attachment;
	filename=v1-0003-convert-FixedParallelState-last_xlog_end-to-an-at.patch



^ permalink  raw  reply  [nested|flat] 440+ messages in thread

* [PATCH v2 2/9] convert ParallelBitmapHeapState->state to an atomic
@ 2026-07-09 18:38 Nathan Bossart <nathan@postgresql.org>
  0 siblings, 0 replies; 440+ messages in thread

From: Nathan Bossart @ 2026-07-09 18:38 UTC (permalink / raw)

---
 src/backend/executor/nodeBitmapHeapscan.c | 23 +++++++----------------
 1 file changed, 7 insertions(+), 16 deletions(-)

diff --git a/src/backend/executor/nodeBitmapHeapscan.c b/src/backend/executor/nodeBitmapHeapscan.c
index 83d6478bc2b..a9e83f30687 100644
--- a/src/backend/executor/nodeBitmapHeapscan.c
+++ b/src/backend/executor/nodeBitmapHeapscan.c
@@ -79,7 +79,6 @@ typedef enum
 /* ----------------
  *	 ParallelBitmapHeapState information
  *		tbmiterator				iterator for scanning current pages
- *		mutex					mutual exclusion for state
  *		state					current state of the TIDBitmap
  *		cv						conditional wait variable
  * ----------------
@@ -87,8 +86,7 @@ typedef enum
 typedef struct ParallelBitmapHeapState
 {
 	dsa_pointer tbmiterator;
-	slock_t		mutex;
-	SharedBitmapState state;
+	pg_atomic_uint32 state;
 	ConditionVariable cv;
 } ParallelBitmapHeapState;
 
@@ -228,9 +226,7 @@ BitmapHeapNext(BitmapHeapScanState *node)
 static inline void
 BitmapDoneInitializingSharedState(ParallelBitmapHeapState *pstate)
 {
-	SpinLockAcquire(&pstate->mutex);
-	pstate->state = BM_FINISHED;
-	SpinLockRelease(&pstate->mutex);
+	pg_atomic_write_membarrier_u32(&pstate->state, BM_FINISHED);
 	ConditionVariableBroadcast(&pstate->cv);
 }
 
@@ -476,15 +472,12 @@ ExecInitBitmapHeapScan(BitmapHeapScan *node, EState *estate, int eflags)
 static bool
 BitmapShouldInitializeSharedState(ParallelBitmapHeapState *pstate)
 {
-	SharedBitmapState state;
+	uint32		state;
 
 	while (1)
 	{
-		SpinLockAcquire(&pstate->mutex);
-		state = pstate->state;
-		if (pstate->state == BM_INITIAL)
-			pstate->state = BM_INPROGRESS;
-		SpinLockRelease(&pstate->mutex);
+		state = BM_INITIAL;
+		pg_atomic_compare_exchange_u32(&pstate->state, &state, BM_INPROGRESS);
 
 		/* Exit if bitmap is done, or if we're the leader. */
 		if (state != BM_INPROGRESS)
@@ -538,9 +531,7 @@ ExecBitmapHeapInitializeDSM(BitmapHeapScanState *node,
 
 	pstate->tbmiterator = 0;
 
-	/* Initialize the mutex */
-	SpinLockInit(&pstate->mutex);
-	pstate->state = BM_INITIAL;
+	pg_atomic_init_u32(&pstate->state, BM_INITIAL);
 
 	ConditionVariableInit(&pstate->cv);
 
@@ -565,7 +556,7 @@ ExecBitmapHeapReInitializeDSM(BitmapHeapScanState *node,
 	if (dsa == NULL)
 		return;
 
-	pstate->state = BM_INITIAL;
+	pg_atomic_write_u32(&pstate->state, BM_INITIAL);
 
 	if (DsaPointerIsValid(pstate->tbmiterator))
 		tbm_free_shared_area(dsa, pstate->tbmiterator);
-- 
2.50.1 (Apple Git-155)


--Xf36GNcW+0xZNily
Content-Type: text/plain; charset=us-ascii
Content-Disposition: attachment;
	filename=v2-0003-convert-FixedParallelState-last_xlog_end-to-an-at.patch



^ permalink  raw  reply  [nested|flat] 440+ messages in thread

* [PATCH v1 2/8] convert ParallelBitmapHeapState->state to an atomic
@ 2026-07-09 18:38 Nathan Bossart <nathan@postgresql.org>
  0 siblings, 0 replies; 440+ messages in thread

From: Nathan Bossart @ 2026-07-09 18:38 UTC (permalink / raw)

---
 src/backend/executor/nodeBitmapHeapscan.c | 21 ++++++---------------
 1 file changed, 6 insertions(+), 15 deletions(-)

diff --git a/src/backend/executor/nodeBitmapHeapscan.c b/src/backend/executor/nodeBitmapHeapscan.c
index 83d6478bc2b..f2bb487bf10 100644
--- a/src/backend/executor/nodeBitmapHeapscan.c
+++ b/src/backend/executor/nodeBitmapHeapscan.c
@@ -79,7 +79,6 @@ typedef enum
 /* ----------------
  *	 ParallelBitmapHeapState information
  *		tbmiterator				iterator for scanning current pages
- *		mutex					mutual exclusion for state
  *		state					current state of the TIDBitmap
  *		cv						conditional wait variable
  * ----------------
@@ -87,8 +86,7 @@ typedef enum
 typedef struct ParallelBitmapHeapState
 {
 	dsa_pointer tbmiterator;
-	slock_t		mutex;
-	SharedBitmapState state;
+	pg_atomic_uint32 state;
 	ConditionVariable cv;
 } ParallelBitmapHeapState;
 
@@ -228,9 +226,7 @@ BitmapHeapNext(BitmapHeapScanState *node)
 static inline void
 BitmapDoneInitializingSharedState(ParallelBitmapHeapState *pstate)
 {
-	SpinLockAcquire(&pstate->mutex);
-	pstate->state = BM_FINISHED;
-	SpinLockRelease(&pstate->mutex);
+	pg_atomic_write_membarrier_u32(&pstate->state, BM_FINISHED);
 	ConditionVariableBroadcast(&pstate->cv);
 }
 
@@ -480,11 +476,8 @@ BitmapShouldInitializeSharedState(ParallelBitmapHeapState *pstate)
 
 	while (1)
 	{
-		SpinLockAcquire(&pstate->mutex);
-		state = pstate->state;
-		if (pstate->state == BM_INITIAL)
-			pstate->state = BM_INPROGRESS;
-		SpinLockRelease(&pstate->mutex);
+		state = BM_INITIAL;
+		pg_atomic_compare_exchange_u32(&pstate->state, &state, BM_INPROGRESS);
 
 		/* Exit if bitmap is done, or if we're the leader. */
 		if (state != BM_INPROGRESS)
@@ -538,9 +531,7 @@ ExecBitmapHeapInitializeDSM(BitmapHeapScanState *node,
 
 	pstate->tbmiterator = 0;
 
-	/* Initialize the mutex */
-	SpinLockInit(&pstate->mutex);
-	pstate->state = BM_INITIAL;
+	pg_atomic_init_u32(&pstate->state, BM_INITIAL);
 
 	ConditionVariableInit(&pstate->cv);
 
@@ -565,7 +556,7 @@ ExecBitmapHeapReInitializeDSM(BitmapHeapScanState *node,
 	if (dsa == NULL)
 		return;
 
-	pstate->state = BM_INITIAL;
+	pg_atomic_write_u32(&pstate->state, BM_INITIAL);
 
 	if (DsaPointerIsValid(pstate->tbmiterator))
 		tbm_free_shared_area(dsa, pstate->tbmiterator);
-- 
2.50.1 (Apple Git-155)


--Ot5x3ffkWEuxilWO
Content-Type: text/plain; charset=us-ascii
Content-Disposition: attachment;
	filename=v1-0003-convert-FixedParallelState-last_xlog_end-to-an-at.patch



^ permalink  raw  reply  [nested|flat] 440+ messages in thread

* [PATCH v1 2/8] convert ParallelBitmapHeapState->state to an atomic
@ 2026-07-09 18:38 Nathan Bossart <nathan@postgresql.org>
  0 siblings, 0 replies; 440+ messages in thread

From: Nathan Bossart @ 2026-07-09 18:38 UTC (permalink / raw)

---
 src/backend/executor/nodeBitmapHeapscan.c | 21 ++++++---------------
 1 file changed, 6 insertions(+), 15 deletions(-)

diff --git a/src/backend/executor/nodeBitmapHeapscan.c b/src/backend/executor/nodeBitmapHeapscan.c
index 83d6478bc2b..f2bb487bf10 100644
--- a/src/backend/executor/nodeBitmapHeapscan.c
+++ b/src/backend/executor/nodeBitmapHeapscan.c
@@ -79,7 +79,6 @@ typedef enum
 /* ----------------
  *	 ParallelBitmapHeapState information
  *		tbmiterator				iterator for scanning current pages
- *		mutex					mutual exclusion for state
  *		state					current state of the TIDBitmap
  *		cv						conditional wait variable
  * ----------------
@@ -87,8 +86,7 @@ typedef enum
 typedef struct ParallelBitmapHeapState
 {
 	dsa_pointer tbmiterator;
-	slock_t		mutex;
-	SharedBitmapState state;
+	pg_atomic_uint32 state;
 	ConditionVariable cv;
 } ParallelBitmapHeapState;
 
@@ -228,9 +226,7 @@ BitmapHeapNext(BitmapHeapScanState *node)
 static inline void
 BitmapDoneInitializingSharedState(ParallelBitmapHeapState *pstate)
 {
-	SpinLockAcquire(&pstate->mutex);
-	pstate->state = BM_FINISHED;
-	SpinLockRelease(&pstate->mutex);
+	pg_atomic_write_membarrier_u32(&pstate->state, BM_FINISHED);
 	ConditionVariableBroadcast(&pstate->cv);
 }
 
@@ -480,11 +476,8 @@ BitmapShouldInitializeSharedState(ParallelBitmapHeapState *pstate)
 
 	while (1)
 	{
-		SpinLockAcquire(&pstate->mutex);
-		state = pstate->state;
-		if (pstate->state == BM_INITIAL)
-			pstate->state = BM_INPROGRESS;
-		SpinLockRelease(&pstate->mutex);
+		state = BM_INITIAL;
+		pg_atomic_compare_exchange_u32(&pstate->state, &state, BM_INPROGRESS);
 
 		/* Exit if bitmap is done, or if we're the leader. */
 		if (state != BM_INPROGRESS)
@@ -538,9 +531,7 @@ ExecBitmapHeapInitializeDSM(BitmapHeapScanState *node,
 
 	pstate->tbmiterator = 0;
 
-	/* Initialize the mutex */
-	SpinLockInit(&pstate->mutex);
-	pstate->state = BM_INITIAL;
+	pg_atomic_init_u32(&pstate->state, BM_INITIAL);
 
 	ConditionVariableInit(&pstate->cv);
 
@@ -565,7 +556,7 @@ ExecBitmapHeapReInitializeDSM(BitmapHeapScanState *node,
 	if (dsa == NULL)
 		return;
 
-	pstate->state = BM_INITIAL;
+	pg_atomic_write_u32(&pstate->state, BM_INITIAL);
 
 	if (DsaPointerIsValid(pstate->tbmiterator))
 		tbm_free_shared_area(dsa, pstate->tbmiterator);
-- 
2.50.1 (Apple Git-155)


--Ot5x3ffkWEuxilWO
Content-Type: text/plain; charset=us-ascii
Content-Disposition: attachment;
	filename=v1-0003-convert-FixedParallelState-last_xlog_end-to-an-at.patch



^ permalink  raw  reply  [nested|flat] 440+ messages in thread

* [PATCH v2 2/9] convert ParallelBitmapHeapState->state to an atomic
@ 2026-07-09 18:38 Nathan Bossart <nathan@postgresql.org>
  0 siblings, 0 replies; 440+ messages in thread

From: Nathan Bossart @ 2026-07-09 18:38 UTC (permalink / raw)

---
 src/backend/executor/nodeBitmapHeapscan.c | 23 +++++++----------------
 1 file changed, 7 insertions(+), 16 deletions(-)

diff --git a/src/backend/executor/nodeBitmapHeapscan.c b/src/backend/executor/nodeBitmapHeapscan.c
index 83d6478bc2b..a9e83f30687 100644
--- a/src/backend/executor/nodeBitmapHeapscan.c
+++ b/src/backend/executor/nodeBitmapHeapscan.c
@@ -79,7 +79,6 @@ typedef enum
 /* ----------------
  *	 ParallelBitmapHeapState information
  *		tbmiterator				iterator for scanning current pages
- *		mutex					mutual exclusion for state
  *		state					current state of the TIDBitmap
  *		cv						conditional wait variable
  * ----------------
@@ -87,8 +86,7 @@ typedef enum
 typedef struct ParallelBitmapHeapState
 {
 	dsa_pointer tbmiterator;
-	slock_t		mutex;
-	SharedBitmapState state;
+	pg_atomic_uint32 state;
 	ConditionVariable cv;
 } ParallelBitmapHeapState;
 
@@ -228,9 +226,7 @@ BitmapHeapNext(BitmapHeapScanState *node)
 static inline void
 BitmapDoneInitializingSharedState(ParallelBitmapHeapState *pstate)
 {
-	SpinLockAcquire(&pstate->mutex);
-	pstate->state = BM_FINISHED;
-	SpinLockRelease(&pstate->mutex);
+	pg_atomic_write_membarrier_u32(&pstate->state, BM_FINISHED);
 	ConditionVariableBroadcast(&pstate->cv);
 }
 
@@ -476,15 +472,12 @@ ExecInitBitmapHeapScan(BitmapHeapScan *node, EState *estate, int eflags)
 static bool
 BitmapShouldInitializeSharedState(ParallelBitmapHeapState *pstate)
 {
-	SharedBitmapState state;
+	uint32		state;
 
 	while (1)
 	{
-		SpinLockAcquire(&pstate->mutex);
-		state = pstate->state;
-		if (pstate->state == BM_INITIAL)
-			pstate->state = BM_INPROGRESS;
-		SpinLockRelease(&pstate->mutex);
+		state = BM_INITIAL;
+		pg_atomic_compare_exchange_u32(&pstate->state, &state, BM_INPROGRESS);
 
 		/* Exit if bitmap is done, or if we're the leader. */
 		if (state != BM_INPROGRESS)
@@ -538,9 +531,7 @@ ExecBitmapHeapInitializeDSM(BitmapHeapScanState *node,
 
 	pstate->tbmiterator = 0;
 
-	/* Initialize the mutex */
-	SpinLockInit(&pstate->mutex);
-	pstate->state = BM_INITIAL;
+	pg_atomic_init_u32(&pstate->state, BM_INITIAL);
 
 	ConditionVariableInit(&pstate->cv);
 
@@ -565,7 +556,7 @@ ExecBitmapHeapReInitializeDSM(BitmapHeapScanState *node,
 	if (dsa == NULL)
 		return;
 
-	pstate->state = BM_INITIAL;
+	pg_atomic_write_u32(&pstate->state, BM_INITIAL);
 
 	if (DsaPointerIsValid(pstate->tbmiterator))
 		tbm_free_shared_area(dsa, pstate->tbmiterator);
-- 
2.50.1 (Apple Git-155)


--Xf36GNcW+0xZNily
Content-Type: text/plain; charset=us-ascii
Content-Disposition: attachment;
	filename=v2-0003-convert-FixedParallelState-last_xlog_end-to-an-at.patch



^ permalink  raw  reply  [nested|flat] 440+ messages in thread

* [PATCH v2 2/9] convert ParallelBitmapHeapState->state to an atomic
@ 2026-07-09 18:38 Nathan Bossart <nathan@postgresql.org>
  0 siblings, 0 replies; 440+ messages in thread

From: Nathan Bossart @ 2026-07-09 18:38 UTC (permalink / raw)

---
 src/backend/executor/nodeBitmapHeapscan.c | 23 +++++++----------------
 1 file changed, 7 insertions(+), 16 deletions(-)

diff --git a/src/backend/executor/nodeBitmapHeapscan.c b/src/backend/executor/nodeBitmapHeapscan.c
index 83d6478bc2b..a9e83f30687 100644
--- a/src/backend/executor/nodeBitmapHeapscan.c
+++ b/src/backend/executor/nodeBitmapHeapscan.c
@@ -79,7 +79,6 @@ typedef enum
 /* ----------------
  *	 ParallelBitmapHeapState information
  *		tbmiterator				iterator for scanning current pages
- *		mutex					mutual exclusion for state
  *		state					current state of the TIDBitmap
  *		cv						conditional wait variable
  * ----------------
@@ -87,8 +86,7 @@ typedef enum
 typedef struct ParallelBitmapHeapState
 {
 	dsa_pointer tbmiterator;
-	slock_t		mutex;
-	SharedBitmapState state;
+	pg_atomic_uint32 state;
 	ConditionVariable cv;
 } ParallelBitmapHeapState;
 
@@ -228,9 +226,7 @@ BitmapHeapNext(BitmapHeapScanState *node)
 static inline void
 BitmapDoneInitializingSharedState(ParallelBitmapHeapState *pstate)
 {
-	SpinLockAcquire(&pstate->mutex);
-	pstate->state = BM_FINISHED;
-	SpinLockRelease(&pstate->mutex);
+	pg_atomic_write_membarrier_u32(&pstate->state, BM_FINISHED);
 	ConditionVariableBroadcast(&pstate->cv);
 }
 
@@ -476,15 +472,12 @@ ExecInitBitmapHeapScan(BitmapHeapScan *node, EState *estate, int eflags)
 static bool
 BitmapShouldInitializeSharedState(ParallelBitmapHeapState *pstate)
 {
-	SharedBitmapState state;
+	uint32		state;
 
 	while (1)
 	{
-		SpinLockAcquire(&pstate->mutex);
-		state = pstate->state;
-		if (pstate->state == BM_INITIAL)
-			pstate->state = BM_INPROGRESS;
-		SpinLockRelease(&pstate->mutex);
+		state = BM_INITIAL;
+		pg_atomic_compare_exchange_u32(&pstate->state, &state, BM_INPROGRESS);
 
 		/* Exit if bitmap is done, or if we're the leader. */
 		if (state != BM_INPROGRESS)
@@ -538,9 +531,7 @@ ExecBitmapHeapInitializeDSM(BitmapHeapScanState *node,
 
 	pstate->tbmiterator = 0;
 
-	/* Initialize the mutex */
-	SpinLockInit(&pstate->mutex);
-	pstate->state = BM_INITIAL;
+	pg_atomic_init_u32(&pstate->state, BM_INITIAL);
 
 	ConditionVariableInit(&pstate->cv);
 
@@ -565,7 +556,7 @@ ExecBitmapHeapReInitializeDSM(BitmapHeapScanState *node,
 	if (dsa == NULL)
 		return;
 
-	pstate->state = BM_INITIAL;
+	pg_atomic_write_u32(&pstate->state, BM_INITIAL);
 
 	if (DsaPointerIsValid(pstate->tbmiterator))
 		tbm_free_shared_area(dsa, pstate->tbmiterator);
-- 
2.50.1 (Apple Git-155)


--Xf36GNcW+0xZNily
Content-Type: text/plain; charset=us-ascii
Content-Disposition: attachment;
	filename=v2-0003-convert-FixedParallelState-last_xlog_end-to-an-at.patch



^ permalink  raw  reply  [nested|flat] 440+ messages in thread

* [PATCH v1 2/8] convert ParallelBitmapHeapState->state to an atomic
@ 2026-07-09 18:38 Nathan Bossart <nathan@postgresql.org>
  0 siblings, 0 replies; 440+ messages in thread

From: Nathan Bossart @ 2026-07-09 18:38 UTC (permalink / raw)

---
 src/backend/executor/nodeBitmapHeapscan.c | 21 ++++++---------------
 1 file changed, 6 insertions(+), 15 deletions(-)

diff --git a/src/backend/executor/nodeBitmapHeapscan.c b/src/backend/executor/nodeBitmapHeapscan.c
index 83d6478bc2b..f2bb487bf10 100644
--- a/src/backend/executor/nodeBitmapHeapscan.c
+++ b/src/backend/executor/nodeBitmapHeapscan.c
@@ -79,7 +79,6 @@ typedef enum
 /* ----------------
  *	 ParallelBitmapHeapState information
  *		tbmiterator				iterator for scanning current pages
- *		mutex					mutual exclusion for state
  *		state					current state of the TIDBitmap
  *		cv						conditional wait variable
  * ----------------
@@ -87,8 +86,7 @@ typedef enum
 typedef struct ParallelBitmapHeapState
 {
 	dsa_pointer tbmiterator;
-	slock_t		mutex;
-	SharedBitmapState state;
+	pg_atomic_uint32 state;
 	ConditionVariable cv;
 } ParallelBitmapHeapState;
 
@@ -228,9 +226,7 @@ BitmapHeapNext(BitmapHeapScanState *node)
 static inline void
 BitmapDoneInitializingSharedState(ParallelBitmapHeapState *pstate)
 {
-	SpinLockAcquire(&pstate->mutex);
-	pstate->state = BM_FINISHED;
-	SpinLockRelease(&pstate->mutex);
+	pg_atomic_write_membarrier_u32(&pstate->state, BM_FINISHED);
 	ConditionVariableBroadcast(&pstate->cv);
 }
 
@@ -480,11 +476,8 @@ BitmapShouldInitializeSharedState(ParallelBitmapHeapState *pstate)
 
 	while (1)
 	{
-		SpinLockAcquire(&pstate->mutex);
-		state = pstate->state;
-		if (pstate->state == BM_INITIAL)
-			pstate->state = BM_INPROGRESS;
-		SpinLockRelease(&pstate->mutex);
+		state = BM_INITIAL;
+		pg_atomic_compare_exchange_u32(&pstate->state, &state, BM_INPROGRESS);
 
 		/* Exit if bitmap is done, or if we're the leader. */
 		if (state != BM_INPROGRESS)
@@ -538,9 +531,7 @@ ExecBitmapHeapInitializeDSM(BitmapHeapScanState *node,
 
 	pstate->tbmiterator = 0;
 
-	/* Initialize the mutex */
-	SpinLockInit(&pstate->mutex);
-	pstate->state = BM_INITIAL;
+	pg_atomic_init_u32(&pstate->state, BM_INITIAL);
 
 	ConditionVariableInit(&pstate->cv);
 
@@ -565,7 +556,7 @@ ExecBitmapHeapReInitializeDSM(BitmapHeapScanState *node,
 	if (dsa == NULL)
 		return;
 
-	pstate->state = BM_INITIAL;
+	pg_atomic_write_u32(&pstate->state, BM_INITIAL);
 
 	if (DsaPointerIsValid(pstate->tbmiterator))
 		tbm_free_shared_area(dsa, pstate->tbmiterator);
-- 
2.50.1 (Apple Git-155)


--Ot5x3ffkWEuxilWO
Content-Type: text/plain; charset=us-ascii
Content-Disposition: attachment;
	filename=v1-0003-convert-FixedParallelState-last_xlog_end-to-an-at.patch



^ permalink  raw  reply  [nested|flat] 440+ messages in thread

* [PATCH v1 2/8] convert ParallelBitmapHeapState->state to an atomic
@ 2026-07-09 18:38 Nathan Bossart <nathan@postgresql.org>
  0 siblings, 0 replies; 440+ messages in thread

From: Nathan Bossart @ 2026-07-09 18:38 UTC (permalink / raw)

---
 src/backend/executor/nodeBitmapHeapscan.c | 21 ++++++---------------
 1 file changed, 6 insertions(+), 15 deletions(-)

diff --git a/src/backend/executor/nodeBitmapHeapscan.c b/src/backend/executor/nodeBitmapHeapscan.c
index 83d6478bc2b..f2bb487bf10 100644
--- a/src/backend/executor/nodeBitmapHeapscan.c
+++ b/src/backend/executor/nodeBitmapHeapscan.c
@@ -79,7 +79,6 @@ typedef enum
 /* ----------------
  *	 ParallelBitmapHeapState information
  *		tbmiterator				iterator for scanning current pages
- *		mutex					mutual exclusion for state
  *		state					current state of the TIDBitmap
  *		cv						conditional wait variable
  * ----------------
@@ -87,8 +86,7 @@ typedef enum
 typedef struct ParallelBitmapHeapState
 {
 	dsa_pointer tbmiterator;
-	slock_t		mutex;
-	SharedBitmapState state;
+	pg_atomic_uint32 state;
 	ConditionVariable cv;
 } ParallelBitmapHeapState;
 
@@ -228,9 +226,7 @@ BitmapHeapNext(BitmapHeapScanState *node)
 static inline void
 BitmapDoneInitializingSharedState(ParallelBitmapHeapState *pstate)
 {
-	SpinLockAcquire(&pstate->mutex);
-	pstate->state = BM_FINISHED;
-	SpinLockRelease(&pstate->mutex);
+	pg_atomic_write_membarrier_u32(&pstate->state, BM_FINISHED);
 	ConditionVariableBroadcast(&pstate->cv);
 }
 
@@ -480,11 +476,8 @@ BitmapShouldInitializeSharedState(ParallelBitmapHeapState *pstate)
 
 	while (1)
 	{
-		SpinLockAcquire(&pstate->mutex);
-		state = pstate->state;
-		if (pstate->state == BM_INITIAL)
-			pstate->state = BM_INPROGRESS;
-		SpinLockRelease(&pstate->mutex);
+		state = BM_INITIAL;
+		pg_atomic_compare_exchange_u32(&pstate->state, &state, BM_INPROGRESS);
 
 		/* Exit if bitmap is done, or if we're the leader. */
 		if (state != BM_INPROGRESS)
@@ -538,9 +531,7 @@ ExecBitmapHeapInitializeDSM(BitmapHeapScanState *node,
 
 	pstate->tbmiterator = 0;
 
-	/* Initialize the mutex */
-	SpinLockInit(&pstate->mutex);
-	pstate->state = BM_INITIAL;
+	pg_atomic_init_u32(&pstate->state, BM_INITIAL);
 
 	ConditionVariableInit(&pstate->cv);
 
@@ -565,7 +556,7 @@ ExecBitmapHeapReInitializeDSM(BitmapHeapScanState *node,
 	if (dsa == NULL)
 		return;
 
-	pstate->state = BM_INITIAL;
+	pg_atomic_write_u32(&pstate->state, BM_INITIAL);
 
 	if (DsaPointerIsValid(pstate->tbmiterator))
 		tbm_free_shared_area(dsa, pstate->tbmiterator);
-- 
2.50.1 (Apple Git-155)


--Ot5x3ffkWEuxilWO
Content-Type: text/plain; charset=us-ascii
Content-Disposition: attachment;
	filename=v1-0003-convert-FixedParallelState-last_xlog_end-to-an-at.patch



^ permalink  raw  reply  [nested|flat] 440+ messages in thread

* [PATCH v1 2/8] convert ParallelBitmapHeapState->state to an atomic
@ 2026-07-09 18:38 Nathan Bossart <nathan@postgresql.org>
  0 siblings, 0 replies; 440+ messages in thread

From: Nathan Bossart @ 2026-07-09 18:38 UTC (permalink / raw)

---
 src/backend/executor/nodeBitmapHeapscan.c | 21 ++++++---------------
 1 file changed, 6 insertions(+), 15 deletions(-)

diff --git a/src/backend/executor/nodeBitmapHeapscan.c b/src/backend/executor/nodeBitmapHeapscan.c
index 83d6478bc2b..f2bb487bf10 100644
--- a/src/backend/executor/nodeBitmapHeapscan.c
+++ b/src/backend/executor/nodeBitmapHeapscan.c
@@ -79,7 +79,6 @@ typedef enum
 /* ----------------
  *	 ParallelBitmapHeapState information
  *		tbmiterator				iterator for scanning current pages
- *		mutex					mutual exclusion for state
  *		state					current state of the TIDBitmap
  *		cv						conditional wait variable
  * ----------------
@@ -87,8 +86,7 @@ typedef enum
 typedef struct ParallelBitmapHeapState
 {
 	dsa_pointer tbmiterator;
-	slock_t		mutex;
-	SharedBitmapState state;
+	pg_atomic_uint32 state;
 	ConditionVariable cv;
 } ParallelBitmapHeapState;
 
@@ -228,9 +226,7 @@ BitmapHeapNext(BitmapHeapScanState *node)
 static inline void
 BitmapDoneInitializingSharedState(ParallelBitmapHeapState *pstate)
 {
-	SpinLockAcquire(&pstate->mutex);
-	pstate->state = BM_FINISHED;
-	SpinLockRelease(&pstate->mutex);
+	pg_atomic_write_membarrier_u32(&pstate->state, BM_FINISHED);
 	ConditionVariableBroadcast(&pstate->cv);
 }
 
@@ -480,11 +476,8 @@ BitmapShouldInitializeSharedState(ParallelBitmapHeapState *pstate)
 
 	while (1)
 	{
-		SpinLockAcquire(&pstate->mutex);
-		state = pstate->state;
-		if (pstate->state == BM_INITIAL)
-			pstate->state = BM_INPROGRESS;
-		SpinLockRelease(&pstate->mutex);
+		state = BM_INITIAL;
+		pg_atomic_compare_exchange_u32(&pstate->state, &state, BM_INPROGRESS);
 
 		/* Exit if bitmap is done, or if we're the leader. */
 		if (state != BM_INPROGRESS)
@@ -538,9 +531,7 @@ ExecBitmapHeapInitializeDSM(BitmapHeapScanState *node,
 
 	pstate->tbmiterator = 0;
 
-	/* Initialize the mutex */
-	SpinLockInit(&pstate->mutex);
-	pstate->state = BM_INITIAL;
+	pg_atomic_init_u32(&pstate->state, BM_INITIAL);
 
 	ConditionVariableInit(&pstate->cv);
 
@@ -565,7 +556,7 @@ ExecBitmapHeapReInitializeDSM(BitmapHeapScanState *node,
 	if (dsa == NULL)
 		return;
 
-	pstate->state = BM_INITIAL;
+	pg_atomic_write_u32(&pstate->state, BM_INITIAL);
 
 	if (DsaPointerIsValid(pstate->tbmiterator))
 		tbm_free_shared_area(dsa, pstate->tbmiterator);
-- 
2.50.1 (Apple Git-155)


--Ot5x3ffkWEuxilWO
Content-Type: text/plain; charset=us-ascii
Content-Disposition: attachment;
	filename=v1-0003-convert-FixedParallelState-last_xlog_end-to-an-at.patch



^ permalink  raw  reply  [nested|flat] 440+ messages in thread

* [PATCH v1 2/8] convert ParallelBitmapHeapState->state to an atomic
@ 2026-07-09 18:38 Nathan Bossart <nathan@postgresql.org>
  0 siblings, 0 replies; 440+ messages in thread

From: Nathan Bossart @ 2026-07-09 18:38 UTC (permalink / raw)

---
 src/backend/executor/nodeBitmapHeapscan.c | 21 ++++++---------------
 1 file changed, 6 insertions(+), 15 deletions(-)

diff --git a/src/backend/executor/nodeBitmapHeapscan.c b/src/backend/executor/nodeBitmapHeapscan.c
index 83d6478bc2b..f2bb487bf10 100644
--- a/src/backend/executor/nodeBitmapHeapscan.c
+++ b/src/backend/executor/nodeBitmapHeapscan.c
@@ -79,7 +79,6 @@ typedef enum
 /* ----------------
  *	 ParallelBitmapHeapState information
  *		tbmiterator				iterator for scanning current pages
- *		mutex					mutual exclusion for state
  *		state					current state of the TIDBitmap
  *		cv						conditional wait variable
  * ----------------
@@ -87,8 +86,7 @@ typedef enum
 typedef struct ParallelBitmapHeapState
 {
 	dsa_pointer tbmiterator;
-	slock_t		mutex;
-	SharedBitmapState state;
+	pg_atomic_uint32 state;
 	ConditionVariable cv;
 } ParallelBitmapHeapState;
 
@@ -228,9 +226,7 @@ BitmapHeapNext(BitmapHeapScanState *node)
 static inline void
 BitmapDoneInitializingSharedState(ParallelBitmapHeapState *pstate)
 {
-	SpinLockAcquire(&pstate->mutex);
-	pstate->state = BM_FINISHED;
-	SpinLockRelease(&pstate->mutex);
+	pg_atomic_write_membarrier_u32(&pstate->state, BM_FINISHED);
 	ConditionVariableBroadcast(&pstate->cv);
 }
 
@@ -480,11 +476,8 @@ BitmapShouldInitializeSharedState(ParallelBitmapHeapState *pstate)
 
 	while (1)
 	{
-		SpinLockAcquire(&pstate->mutex);
-		state = pstate->state;
-		if (pstate->state == BM_INITIAL)
-			pstate->state = BM_INPROGRESS;
-		SpinLockRelease(&pstate->mutex);
+		state = BM_INITIAL;
+		pg_atomic_compare_exchange_u32(&pstate->state, &state, BM_INPROGRESS);
 
 		/* Exit if bitmap is done, or if we're the leader. */
 		if (state != BM_INPROGRESS)
@@ -538,9 +531,7 @@ ExecBitmapHeapInitializeDSM(BitmapHeapScanState *node,
 
 	pstate->tbmiterator = 0;
 
-	/* Initialize the mutex */
-	SpinLockInit(&pstate->mutex);
-	pstate->state = BM_INITIAL;
+	pg_atomic_init_u32(&pstate->state, BM_INITIAL);
 
 	ConditionVariableInit(&pstate->cv);
 
@@ -565,7 +556,7 @@ ExecBitmapHeapReInitializeDSM(BitmapHeapScanState *node,
 	if (dsa == NULL)
 		return;
 
-	pstate->state = BM_INITIAL;
+	pg_atomic_write_u32(&pstate->state, BM_INITIAL);
 
 	if (DsaPointerIsValid(pstate->tbmiterator))
 		tbm_free_shared_area(dsa, pstate->tbmiterator);
-- 
2.50.1 (Apple Git-155)


--Ot5x3ffkWEuxilWO
Content-Type: text/plain; charset=us-ascii
Content-Disposition: attachment;
	filename=v1-0003-convert-FixedParallelState-last_xlog_end-to-an-at.patch



^ permalink  raw  reply  [nested|flat] 440+ messages in thread

* [PATCH v2 2/9] convert ParallelBitmapHeapState->state to an atomic
@ 2026-07-09 18:38 Nathan Bossart <nathan@postgresql.org>
  0 siblings, 0 replies; 440+ messages in thread

From: Nathan Bossart @ 2026-07-09 18:38 UTC (permalink / raw)

---
 src/backend/executor/nodeBitmapHeapscan.c | 23 +++++++----------------
 1 file changed, 7 insertions(+), 16 deletions(-)

diff --git a/src/backend/executor/nodeBitmapHeapscan.c b/src/backend/executor/nodeBitmapHeapscan.c
index 83d6478bc2b..a9e83f30687 100644
--- a/src/backend/executor/nodeBitmapHeapscan.c
+++ b/src/backend/executor/nodeBitmapHeapscan.c
@@ -79,7 +79,6 @@ typedef enum
 /* ----------------
  *	 ParallelBitmapHeapState information
  *		tbmiterator				iterator for scanning current pages
- *		mutex					mutual exclusion for state
  *		state					current state of the TIDBitmap
  *		cv						conditional wait variable
  * ----------------
@@ -87,8 +86,7 @@ typedef enum
 typedef struct ParallelBitmapHeapState
 {
 	dsa_pointer tbmiterator;
-	slock_t		mutex;
-	SharedBitmapState state;
+	pg_atomic_uint32 state;
 	ConditionVariable cv;
 } ParallelBitmapHeapState;
 
@@ -228,9 +226,7 @@ BitmapHeapNext(BitmapHeapScanState *node)
 static inline void
 BitmapDoneInitializingSharedState(ParallelBitmapHeapState *pstate)
 {
-	SpinLockAcquire(&pstate->mutex);
-	pstate->state = BM_FINISHED;
-	SpinLockRelease(&pstate->mutex);
+	pg_atomic_write_membarrier_u32(&pstate->state, BM_FINISHED);
 	ConditionVariableBroadcast(&pstate->cv);
 }
 
@@ -476,15 +472,12 @@ ExecInitBitmapHeapScan(BitmapHeapScan *node, EState *estate, int eflags)
 static bool
 BitmapShouldInitializeSharedState(ParallelBitmapHeapState *pstate)
 {
-	SharedBitmapState state;
+	uint32		state;
 
 	while (1)
 	{
-		SpinLockAcquire(&pstate->mutex);
-		state = pstate->state;
-		if (pstate->state == BM_INITIAL)
-			pstate->state = BM_INPROGRESS;
-		SpinLockRelease(&pstate->mutex);
+		state = BM_INITIAL;
+		pg_atomic_compare_exchange_u32(&pstate->state, &state, BM_INPROGRESS);
 
 		/* Exit if bitmap is done, or if we're the leader. */
 		if (state != BM_INPROGRESS)
@@ -538,9 +531,7 @@ ExecBitmapHeapInitializeDSM(BitmapHeapScanState *node,
 
 	pstate->tbmiterator = 0;
 
-	/* Initialize the mutex */
-	SpinLockInit(&pstate->mutex);
-	pstate->state = BM_INITIAL;
+	pg_atomic_init_u32(&pstate->state, BM_INITIAL);
 
 	ConditionVariableInit(&pstate->cv);
 
@@ -565,7 +556,7 @@ ExecBitmapHeapReInitializeDSM(BitmapHeapScanState *node,
 	if (dsa == NULL)
 		return;
 
-	pstate->state = BM_INITIAL;
+	pg_atomic_write_u32(&pstate->state, BM_INITIAL);
 
 	if (DsaPointerIsValid(pstate->tbmiterator))
 		tbm_free_shared_area(dsa, pstate->tbmiterator);
-- 
2.50.1 (Apple Git-155)


--Xf36GNcW+0xZNily
Content-Type: text/plain; charset=us-ascii
Content-Disposition: attachment;
	filename=v2-0003-convert-FixedParallelState-last_xlog_end-to-an-at.patch



^ permalink  raw  reply  [nested|flat] 440+ messages in thread

* [PATCH v1 2/8] convert ParallelBitmapHeapState->state to an atomic
@ 2026-07-09 18:38 Nathan Bossart <nathan@postgresql.org>
  0 siblings, 0 replies; 440+ messages in thread

From: Nathan Bossart @ 2026-07-09 18:38 UTC (permalink / raw)

---
 src/backend/executor/nodeBitmapHeapscan.c | 21 ++++++---------------
 1 file changed, 6 insertions(+), 15 deletions(-)

diff --git a/src/backend/executor/nodeBitmapHeapscan.c b/src/backend/executor/nodeBitmapHeapscan.c
index 83d6478bc2b..f2bb487bf10 100644
--- a/src/backend/executor/nodeBitmapHeapscan.c
+++ b/src/backend/executor/nodeBitmapHeapscan.c
@@ -79,7 +79,6 @@ typedef enum
 /* ----------------
  *	 ParallelBitmapHeapState information
  *		tbmiterator				iterator for scanning current pages
- *		mutex					mutual exclusion for state
  *		state					current state of the TIDBitmap
  *		cv						conditional wait variable
  * ----------------
@@ -87,8 +86,7 @@ typedef enum
 typedef struct ParallelBitmapHeapState
 {
 	dsa_pointer tbmiterator;
-	slock_t		mutex;
-	SharedBitmapState state;
+	pg_atomic_uint32 state;
 	ConditionVariable cv;
 } ParallelBitmapHeapState;
 
@@ -228,9 +226,7 @@ BitmapHeapNext(BitmapHeapScanState *node)
 static inline void
 BitmapDoneInitializingSharedState(ParallelBitmapHeapState *pstate)
 {
-	SpinLockAcquire(&pstate->mutex);
-	pstate->state = BM_FINISHED;
-	SpinLockRelease(&pstate->mutex);
+	pg_atomic_write_membarrier_u32(&pstate->state, BM_FINISHED);
 	ConditionVariableBroadcast(&pstate->cv);
 }
 
@@ -480,11 +476,8 @@ BitmapShouldInitializeSharedState(ParallelBitmapHeapState *pstate)
 
 	while (1)
 	{
-		SpinLockAcquire(&pstate->mutex);
-		state = pstate->state;
-		if (pstate->state == BM_INITIAL)
-			pstate->state = BM_INPROGRESS;
-		SpinLockRelease(&pstate->mutex);
+		state = BM_INITIAL;
+		pg_atomic_compare_exchange_u32(&pstate->state, &state, BM_INPROGRESS);
 
 		/* Exit if bitmap is done, or if we're the leader. */
 		if (state != BM_INPROGRESS)
@@ -538,9 +531,7 @@ ExecBitmapHeapInitializeDSM(BitmapHeapScanState *node,
 
 	pstate->tbmiterator = 0;
 
-	/* Initialize the mutex */
-	SpinLockInit(&pstate->mutex);
-	pstate->state = BM_INITIAL;
+	pg_atomic_init_u32(&pstate->state, BM_INITIAL);
 
 	ConditionVariableInit(&pstate->cv);
 
@@ -565,7 +556,7 @@ ExecBitmapHeapReInitializeDSM(BitmapHeapScanState *node,
 	if (dsa == NULL)
 		return;
 
-	pstate->state = BM_INITIAL;
+	pg_atomic_write_u32(&pstate->state, BM_INITIAL);
 
 	if (DsaPointerIsValid(pstate->tbmiterator))
 		tbm_free_shared_area(dsa, pstate->tbmiterator);
-- 
2.50.1 (Apple Git-155)


--Ot5x3ffkWEuxilWO
Content-Type: text/plain; charset=us-ascii
Content-Disposition: attachment;
	filename=v1-0003-convert-FixedParallelState-last_xlog_end-to-an-at.patch



^ permalink  raw  reply  [nested|flat] 440+ messages in thread

* [PATCH v1 2/8] convert ParallelBitmapHeapState->state to an atomic
@ 2026-07-09 18:38 Nathan Bossart <nathan@postgresql.org>
  0 siblings, 0 replies; 440+ messages in thread

From: Nathan Bossart @ 2026-07-09 18:38 UTC (permalink / raw)

---
 src/backend/executor/nodeBitmapHeapscan.c | 21 ++++++---------------
 1 file changed, 6 insertions(+), 15 deletions(-)

diff --git a/src/backend/executor/nodeBitmapHeapscan.c b/src/backend/executor/nodeBitmapHeapscan.c
index 83d6478bc2b..f2bb487bf10 100644
--- a/src/backend/executor/nodeBitmapHeapscan.c
+++ b/src/backend/executor/nodeBitmapHeapscan.c
@@ -79,7 +79,6 @@ typedef enum
 /* ----------------
  *	 ParallelBitmapHeapState information
  *		tbmiterator				iterator for scanning current pages
- *		mutex					mutual exclusion for state
  *		state					current state of the TIDBitmap
  *		cv						conditional wait variable
  * ----------------
@@ -87,8 +86,7 @@ typedef enum
 typedef struct ParallelBitmapHeapState
 {
 	dsa_pointer tbmiterator;
-	slock_t		mutex;
-	SharedBitmapState state;
+	pg_atomic_uint32 state;
 	ConditionVariable cv;
 } ParallelBitmapHeapState;
 
@@ -228,9 +226,7 @@ BitmapHeapNext(BitmapHeapScanState *node)
 static inline void
 BitmapDoneInitializingSharedState(ParallelBitmapHeapState *pstate)
 {
-	SpinLockAcquire(&pstate->mutex);
-	pstate->state = BM_FINISHED;
-	SpinLockRelease(&pstate->mutex);
+	pg_atomic_write_membarrier_u32(&pstate->state, BM_FINISHED);
 	ConditionVariableBroadcast(&pstate->cv);
 }
 
@@ -480,11 +476,8 @@ BitmapShouldInitializeSharedState(ParallelBitmapHeapState *pstate)
 
 	while (1)
 	{
-		SpinLockAcquire(&pstate->mutex);
-		state = pstate->state;
-		if (pstate->state == BM_INITIAL)
-			pstate->state = BM_INPROGRESS;
-		SpinLockRelease(&pstate->mutex);
+		state = BM_INITIAL;
+		pg_atomic_compare_exchange_u32(&pstate->state, &state, BM_INPROGRESS);
 
 		/* Exit if bitmap is done, or if we're the leader. */
 		if (state != BM_INPROGRESS)
@@ -538,9 +531,7 @@ ExecBitmapHeapInitializeDSM(BitmapHeapScanState *node,
 
 	pstate->tbmiterator = 0;
 
-	/* Initialize the mutex */
-	SpinLockInit(&pstate->mutex);
-	pstate->state = BM_INITIAL;
+	pg_atomic_init_u32(&pstate->state, BM_INITIAL);
 
 	ConditionVariableInit(&pstate->cv);
 
@@ -565,7 +556,7 @@ ExecBitmapHeapReInitializeDSM(BitmapHeapScanState *node,
 	if (dsa == NULL)
 		return;
 
-	pstate->state = BM_INITIAL;
+	pg_atomic_write_u32(&pstate->state, BM_INITIAL);
 
 	if (DsaPointerIsValid(pstate->tbmiterator))
 		tbm_free_shared_area(dsa, pstate->tbmiterator);
-- 
2.50.1 (Apple Git-155)


--Ot5x3ffkWEuxilWO
Content-Type: text/plain; charset=us-ascii
Content-Disposition: attachment;
	filename=v1-0003-convert-FixedParallelState-last_xlog_end-to-an-at.patch



^ permalink  raw  reply  [nested|flat] 440+ messages in thread

* [PATCH v1 2/8] convert ParallelBitmapHeapState->state to an atomic
@ 2026-07-09 18:38 Nathan Bossart <nathan@postgresql.org>
  0 siblings, 0 replies; 440+ messages in thread

From: Nathan Bossart @ 2026-07-09 18:38 UTC (permalink / raw)

---
 src/backend/executor/nodeBitmapHeapscan.c | 21 ++++++---------------
 1 file changed, 6 insertions(+), 15 deletions(-)

diff --git a/src/backend/executor/nodeBitmapHeapscan.c b/src/backend/executor/nodeBitmapHeapscan.c
index 83d6478bc2b..f2bb487bf10 100644
--- a/src/backend/executor/nodeBitmapHeapscan.c
+++ b/src/backend/executor/nodeBitmapHeapscan.c
@@ -79,7 +79,6 @@ typedef enum
 /* ----------------
  *	 ParallelBitmapHeapState information
  *		tbmiterator				iterator for scanning current pages
- *		mutex					mutual exclusion for state
  *		state					current state of the TIDBitmap
  *		cv						conditional wait variable
  * ----------------
@@ -87,8 +86,7 @@ typedef enum
 typedef struct ParallelBitmapHeapState
 {
 	dsa_pointer tbmiterator;
-	slock_t		mutex;
-	SharedBitmapState state;
+	pg_atomic_uint32 state;
 	ConditionVariable cv;
 } ParallelBitmapHeapState;
 
@@ -228,9 +226,7 @@ BitmapHeapNext(BitmapHeapScanState *node)
 static inline void
 BitmapDoneInitializingSharedState(ParallelBitmapHeapState *pstate)
 {
-	SpinLockAcquire(&pstate->mutex);
-	pstate->state = BM_FINISHED;
-	SpinLockRelease(&pstate->mutex);
+	pg_atomic_write_membarrier_u32(&pstate->state, BM_FINISHED);
 	ConditionVariableBroadcast(&pstate->cv);
 }
 
@@ -480,11 +476,8 @@ BitmapShouldInitializeSharedState(ParallelBitmapHeapState *pstate)
 
 	while (1)
 	{
-		SpinLockAcquire(&pstate->mutex);
-		state = pstate->state;
-		if (pstate->state == BM_INITIAL)
-			pstate->state = BM_INPROGRESS;
-		SpinLockRelease(&pstate->mutex);
+		state = BM_INITIAL;
+		pg_atomic_compare_exchange_u32(&pstate->state, &state, BM_INPROGRESS);
 
 		/* Exit if bitmap is done, or if we're the leader. */
 		if (state != BM_INPROGRESS)
@@ -538,9 +531,7 @@ ExecBitmapHeapInitializeDSM(BitmapHeapScanState *node,
 
 	pstate->tbmiterator = 0;
 
-	/* Initialize the mutex */
-	SpinLockInit(&pstate->mutex);
-	pstate->state = BM_INITIAL;
+	pg_atomic_init_u32(&pstate->state, BM_INITIAL);
 
 	ConditionVariableInit(&pstate->cv);
 
@@ -565,7 +556,7 @@ ExecBitmapHeapReInitializeDSM(BitmapHeapScanState *node,
 	if (dsa == NULL)
 		return;
 
-	pstate->state = BM_INITIAL;
+	pg_atomic_write_u32(&pstate->state, BM_INITIAL);
 
 	if (DsaPointerIsValid(pstate->tbmiterator))
 		tbm_free_shared_area(dsa, pstate->tbmiterator);
-- 
2.50.1 (Apple Git-155)


--Ot5x3ffkWEuxilWO
Content-Type: text/plain; charset=us-ascii
Content-Disposition: attachment;
	filename=v1-0003-convert-FixedParallelState-last_xlog_end-to-an-at.patch



^ permalink  raw  reply  [nested|flat] 440+ messages in thread

* [PATCH v1 2/8] convert ParallelBitmapHeapState->state to an atomic
@ 2026-07-09 18:38 Nathan Bossart <nathan@postgresql.org>
  0 siblings, 0 replies; 440+ messages in thread

From: Nathan Bossart @ 2026-07-09 18:38 UTC (permalink / raw)

---
 src/backend/executor/nodeBitmapHeapscan.c | 21 ++++++---------------
 1 file changed, 6 insertions(+), 15 deletions(-)

diff --git a/src/backend/executor/nodeBitmapHeapscan.c b/src/backend/executor/nodeBitmapHeapscan.c
index 83d6478bc2b..f2bb487bf10 100644
--- a/src/backend/executor/nodeBitmapHeapscan.c
+++ b/src/backend/executor/nodeBitmapHeapscan.c
@@ -79,7 +79,6 @@ typedef enum
 /* ----------------
  *	 ParallelBitmapHeapState information
  *		tbmiterator				iterator for scanning current pages
- *		mutex					mutual exclusion for state
  *		state					current state of the TIDBitmap
  *		cv						conditional wait variable
  * ----------------
@@ -87,8 +86,7 @@ typedef enum
 typedef struct ParallelBitmapHeapState
 {
 	dsa_pointer tbmiterator;
-	slock_t		mutex;
-	SharedBitmapState state;
+	pg_atomic_uint32 state;
 	ConditionVariable cv;
 } ParallelBitmapHeapState;
 
@@ -228,9 +226,7 @@ BitmapHeapNext(BitmapHeapScanState *node)
 static inline void
 BitmapDoneInitializingSharedState(ParallelBitmapHeapState *pstate)
 {
-	SpinLockAcquire(&pstate->mutex);
-	pstate->state = BM_FINISHED;
-	SpinLockRelease(&pstate->mutex);
+	pg_atomic_write_membarrier_u32(&pstate->state, BM_FINISHED);
 	ConditionVariableBroadcast(&pstate->cv);
 }
 
@@ -480,11 +476,8 @@ BitmapShouldInitializeSharedState(ParallelBitmapHeapState *pstate)
 
 	while (1)
 	{
-		SpinLockAcquire(&pstate->mutex);
-		state = pstate->state;
-		if (pstate->state == BM_INITIAL)
-			pstate->state = BM_INPROGRESS;
-		SpinLockRelease(&pstate->mutex);
+		state = BM_INITIAL;
+		pg_atomic_compare_exchange_u32(&pstate->state, &state, BM_INPROGRESS);
 
 		/* Exit if bitmap is done, or if we're the leader. */
 		if (state != BM_INPROGRESS)
@@ -538,9 +531,7 @@ ExecBitmapHeapInitializeDSM(BitmapHeapScanState *node,
 
 	pstate->tbmiterator = 0;
 
-	/* Initialize the mutex */
-	SpinLockInit(&pstate->mutex);
-	pstate->state = BM_INITIAL;
+	pg_atomic_init_u32(&pstate->state, BM_INITIAL);
 
 	ConditionVariableInit(&pstate->cv);
 
@@ -565,7 +556,7 @@ ExecBitmapHeapReInitializeDSM(BitmapHeapScanState *node,
 	if (dsa == NULL)
 		return;
 
-	pstate->state = BM_INITIAL;
+	pg_atomic_write_u32(&pstate->state, BM_INITIAL);
 
 	if (DsaPointerIsValid(pstate->tbmiterator))
 		tbm_free_shared_area(dsa, pstate->tbmiterator);
-- 
2.50.1 (Apple Git-155)


--Ot5x3ffkWEuxilWO
Content-Type: text/plain; charset=us-ascii
Content-Disposition: attachment;
	filename=v1-0003-convert-FixedParallelState-last_xlog_end-to-an-at.patch



^ permalink  raw  reply  [nested|flat] 440+ messages in thread

* [PATCH v1 2/8] convert ParallelBitmapHeapState->state to an atomic
@ 2026-07-09 18:38 Nathan Bossart <nathan@postgresql.org>
  0 siblings, 0 replies; 440+ messages in thread

From: Nathan Bossart @ 2026-07-09 18:38 UTC (permalink / raw)

---
 src/backend/executor/nodeBitmapHeapscan.c | 21 ++++++---------------
 1 file changed, 6 insertions(+), 15 deletions(-)

diff --git a/src/backend/executor/nodeBitmapHeapscan.c b/src/backend/executor/nodeBitmapHeapscan.c
index 83d6478bc2b..f2bb487bf10 100644
--- a/src/backend/executor/nodeBitmapHeapscan.c
+++ b/src/backend/executor/nodeBitmapHeapscan.c
@@ -79,7 +79,6 @@ typedef enum
 /* ----------------
  *	 ParallelBitmapHeapState information
  *		tbmiterator				iterator for scanning current pages
- *		mutex					mutual exclusion for state
  *		state					current state of the TIDBitmap
  *		cv						conditional wait variable
  * ----------------
@@ -87,8 +86,7 @@ typedef enum
 typedef struct ParallelBitmapHeapState
 {
 	dsa_pointer tbmiterator;
-	slock_t		mutex;
-	SharedBitmapState state;
+	pg_atomic_uint32 state;
 	ConditionVariable cv;
 } ParallelBitmapHeapState;
 
@@ -228,9 +226,7 @@ BitmapHeapNext(BitmapHeapScanState *node)
 static inline void
 BitmapDoneInitializingSharedState(ParallelBitmapHeapState *pstate)
 {
-	SpinLockAcquire(&pstate->mutex);
-	pstate->state = BM_FINISHED;
-	SpinLockRelease(&pstate->mutex);
+	pg_atomic_write_membarrier_u32(&pstate->state, BM_FINISHED);
 	ConditionVariableBroadcast(&pstate->cv);
 }
 
@@ -480,11 +476,8 @@ BitmapShouldInitializeSharedState(ParallelBitmapHeapState *pstate)
 
 	while (1)
 	{
-		SpinLockAcquire(&pstate->mutex);
-		state = pstate->state;
-		if (pstate->state == BM_INITIAL)
-			pstate->state = BM_INPROGRESS;
-		SpinLockRelease(&pstate->mutex);
+		state = BM_INITIAL;
+		pg_atomic_compare_exchange_u32(&pstate->state, &state, BM_INPROGRESS);
 
 		/* Exit if bitmap is done, or if we're the leader. */
 		if (state != BM_INPROGRESS)
@@ -538,9 +531,7 @@ ExecBitmapHeapInitializeDSM(BitmapHeapScanState *node,
 
 	pstate->tbmiterator = 0;
 
-	/* Initialize the mutex */
-	SpinLockInit(&pstate->mutex);
-	pstate->state = BM_INITIAL;
+	pg_atomic_init_u32(&pstate->state, BM_INITIAL);
 
 	ConditionVariableInit(&pstate->cv);
 
@@ -565,7 +556,7 @@ ExecBitmapHeapReInitializeDSM(BitmapHeapScanState *node,
 	if (dsa == NULL)
 		return;
 
-	pstate->state = BM_INITIAL;
+	pg_atomic_write_u32(&pstate->state, BM_INITIAL);
 
 	if (DsaPointerIsValid(pstate->tbmiterator))
 		tbm_free_shared_area(dsa, pstate->tbmiterator);
-- 
2.50.1 (Apple Git-155)


--Ot5x3ffkWEuxilWO
Content-Type: text/plain; charset=us-ascii
Content-Disposition: attachment;
	filename=v1-0003-convert-FixedParallelState-last_xlog_end-to-an-at.patch



^ permalink  raw  reply  [nested|flat] 440+ messages in thread

* [PATCH v2 2/9] convert ParallelBitmapHeapState->state to an atomic
@ 2026-07-09 18:38 Nathan Bossart <nathan@postgresql.org>
  0 siblings, 0 replies; 440+ messages in thread

From: Nathan Bossart @ 2026-07-09 18:38 UTC (permalink / raw)

---
 src/backend/executor/nodeBitmapHeapscan.c | 23 +++++++----------------
 1 file changed, 7 insertions(+), 16 deletions(-)

diff --git a/src/backend/executor/nodeBitmapHeapscan.c b/src/backend/executor/nodeBitmapHeapscan.c
index 83d6478bc2b..a9e83f30687 100644
--- a/src/backend/executor/nodeBitmapHeapscan.c
+++ b/src/backend/executor/nodeBitmapHeapscan.c
@@ -79,7 +79,6 @@ typedef enum
 /* ----------------
  *	 ParallelBitmapHeapState information
  *		tbmiterator				iterator for scanning current pages
- *		mutex					mutual exclusion for state
  *		state					current state of the TIDBitmap
  *		cv						conditional wait variable
  * ----------------
@@ -87,8 +86,7 @@ typedef enum
 typedef struct ParallelBitmapHeapState
 {
 	dsa_pointer tbmiterator;
-	slock_t		mutex;
-	SharedBitmapState state;
+	pg_atomic_uint32 state;
 	ConditionVariable cv;
 } ParallelBitmapHeapState;
 
@@ -228,9 +226,7 @@ BitmapHeapNext(BitmapHeapScanState *node)
 static inline void
 BitmapDoneInitializingSharedState(ParallelBitmapHeapState *pstate)
 {
-	SpinLockAcquire(&pstate->mutex);
-	pstate->state = BM_FINISHED;
-	SpinLockRelease(&pstate->mutex);
+	pg_atomic_write_membarrier_u32(&pstate->state, BM_FINISHED);
 	ConditionVariableBroadcast(&pstate->cv);
 }
 
@@ -476,15 +472,12 @@ ExecInitBitmapHeapScan(BitmapHeapScan *node, EState *estate, int eflags)
 static bool
 BitmapShouldInitializeSharedState(ParallelBitmapHeapState *pstate)
 {
-	SharedBitmapState state;
+	uint32		state;
 
 	while (1)
 	{
-		SpinLockAcquire(&pstate->mutex);
-		state = pstate->state;
-		if (pstate->state == BM_INITIAL)
-			pstate->state = BM_INPROGRESS;
-		SpinLockRelease(&pstate->mutex);
+		state = BM_INITIAL;
+		pg_atomic_compare_exchange_u32(&pstate->state, &state, BM_INPROGRESS);
 
 		/* Exit if bitmap is done, or if we're the leader. */
 		if (state != BM_INPROGRESS)
@@ -538,9 +531,7 @@ ExecBitmapHeapInitializeDSM(BitmapHeapScanState *node,
 
 	pstate->tbmiterator = 0;
 
-	/* Initialize the mutex */
-	SpinLockInit(&pstate->mutex);
-	pstate->state = BM_INITIAL;
+	pg_atomic_init_u32(&pstate->state, BM_INITIAL);
 
 	ConditionVariableInit(&pstate->cv);
 
@@ -565,7 +556,7 @@ ExecBitmapHeapReInitializeDSM(BitmapHeapScanState *node,
 	if (dsa == NULL)
 		return;
 
-	pstate->state = BM_INITIAL;
+	pg_atomic_write_u32(&pstate->state, BM_INITIAL);
 
 	if (DsaPointerIsValid(pstate->tbmiterator))
 		tbm_free_shared_area(dsa, pstate->tbmiterator);
-- 
2.50.1 (Apple Git-155)


--Xf36GNcW+0xZNily
Content-Type: text/plain; charset=us-ascii
Content-Disposition: attachment;
	filename=v2-0003-convert-FixedParallelState-last_xlog_end-to-an-at.patch



^ permalink  raw  reply  [nested|flat] 440+ messages in thread

* [PATCH v1 2/8] convert ParallelBitmapHeapState->state to an atomic
@ 2026-07-09 18:38 Nathan Bossart <nathan@postgresql.org>
  0 siblings, 0 replies; 440+ messages in thread

From: Nathan Bossart @ 2026-07-09 18:38 UTC (permalink / raw)

---
 src/backend/executor/nodeBitmapHeapscan.c | 21 ++++++---------------
 1 file changed, 6 insertions(+), 15 deletions(-)

diff --git a/src/backend/executor/nodeBitmapHeapscan.c b/src/backend/executor/nodeBitmapHeapscan.c
index 83d6478bc2b..f2bb487bf10 100644
--- a/src/backend/executor/nodeBitmapHeapscan.c
+++ b/src/backend/executor/nodeBitmapHeapscan.c
@@ -79,7 +79,6 @@ typedef enum
 /* ----------------
  *	 ParallelBitmapHeapState information
  *		tbmiterator				iterator for scanning current pages
- *		mutex					mutual exclusion for state
  *		state					current state of the TIDBitmap
  *		cv						conditional wait variable
  * ----------------
@@ -87,8 +86,7 @@ typedef enum
 typedef struct ParallelBitmapHeapState
 {
 	dsa_pointer tbmiterator;
-	slock_t		mutex;
-	SharedBitmapState state;
+	pg_atomic_uint32 state;
 	ConditionVariable cv;
 } ParallelBitmapHeapState;
 
@@ -228,9 +226,7 @@ BitmapHeapNext(BitmapHeapScanState *node)
 static inline void
 BitmapDoneInitializingSharedState(ParallelBitmapHeapState *pstate)
 {
-	SpinLockAcquire(&pstate->mutex);
-	pstate->state = BM_FINISHED;
-	SpinLockRelease(&pstate->mutex);
+	pg_atomic_write_membarrier_u32(&pstate->state, BM_FINISHED);
 	ConditionVariableBroadcast(&pstate->cv);
 }
 
@@ -480,11 +476,8 @@ BitmapShouldInitializeSharedState(ParallelBitmapHeapState *pstate)
 
 	while (1)
 	{
-		SpinLockAcquire(&pstate->mutex);
-		state = pstate->state;
-		if (pstate->state == BM_INITIAL)
-			pstate->state = BM_INPROGRESS;
-		SpinLockRelease(&pstate->mutex);
+		state = BM_INITIAL;
+		pg_atomic_compare_exchange_u32(&pstate->state, &state, BM_INPROGRESS);
 
 		/* Exit if bitmap is done, or if we're the leader. */
 		if (state != BM_INPROGRESS)
@@ -538,9 +531,7 @@ ExecBitmapHeapInitializeDSM(BitmapHeapScanState *node,
 
 	pstate->tbmiterator = 0;
 
-	/* Initialize the mutex */
-	SpinLockInit(&pstate->mutex);
-	pstate->state = BM_INITIAL;
+	pg_atomic_init_u32(&pstate->state, BM_INITIAL);
 
 	ConditionVariableInit(&pstate->cv);
 
@@ -565,7 +556,7 @@ ExecBitmapHeapReInitializeDSM(BitmapHeapScanState *node,
 	if (dsa == NULL)
 		return;
 
-	pstate->state = BM_INITIAL;
+	pg_atomic_write_u32(&pstate->state, BM_INITIAL);
 
 	if (DsaPointerIsValid(pstate->tbmiterator))
 		tbm_free_shared_area(dsa, pstate->tbmiterator);
-- 
2.50.1 (Apple Git-155)


--Ot5x3ffkWEuxilWO
Content-Type: text/plain; charset=us-ascii
Content-Disposition: attachment;
	filename=v1-0003-convert-FixedParallelState-last_xlog_end-to-an-at.patch



^ permalink  raw  reply  [nested|flat] 440+ messages in thread

* [PATCH v1 2/8] convert ParallelBitmapHeapState->state to an atomic
@ 2026-07-09 18:38 Nathan Bossart <nathan@postgresql.org>
  0 siblings, 0 replies; 440+ messages in thread

From: Nathan Bossart @ 2026-07-09 18:38 UTC (permalink / raw)

---
 src/backend/executor/nodeBitmapHeapscan.c | 21 ++++++---------------
 1 file changed, 6 insertions(+), 15 deletions(-)

diff --git a/src/backend/executor/nodeBitmapHeapscan.c b/src/backend/executor/nodeBitmapHeapscan.c
index 83d6478bc2b..f2bb487bf10 100644
--- a/src/backend/executor/nodeBitmapHeapscan.c
+++ b/src/backend/executor/nodeBitmapHeapscan.c
@@ -79,7 +79,6 @@ typedef enum
 /* ----------------
  *	 ParallelBitmapHeapState information
  *		tbmiterator				iterator for scanning current pages
- *		mutex					mutual exclusion for state
  *		state					current state of the TIDBitmap
  *		cv						conditional wait variable
  * ----------------
@@ -87,8 +86,7 @@ typedef enum
 typedef struct ParallelBitmapHeapState
 {
 	dsa_pointer tbmiterator;
-	slock_t		mutex;
-	SharedBitmapState state;
+	pg_atomic_uint32 state;
 	ConditionVariable cv;
 } ParallelBitmapHeapState;
 
@@ -228,9 +226,7 @@ BitmapHeapNext(BitmapHeapScanState *node)
 static inline void
 BitmapDoneInitializingSharedState(ParallelBitmapHeapState *pstate)
 {
-	SpinLockAcquire(&pstate->mutex);
-	pstate->state = BM_FINISHED;
-	SpinLockRelease(&pstate->mutex);
+	pg_atomic_write_membarrier_u32(&pstate->state, BM_FINISHED);
 	ConditionVariableBroadcast(&pstate->cv);
 }
 
@@ -480,11 +476,8 @@ BitmapShouldInitializeSharedState(ParallelBitmapHeapState *pstate)
 
 	while (1)
 	{
-		SpinLockAcquire(&pstate->mutex);
-		state = pstate->state;
-		if (pstate->state == BM_INITIAL)
-			pstate->state = BM_INPROGRESS;
-		SpinLockRelease(&pstate->mutex);
+		state = BM_INITIAL;
+		pg_atomic_compare_exchange_u32(&pstate->state, &state, BM_INPROGRESS);
 
 		/* Exit if bitmap is done, or if we're the leader. */
 		if (state != BM_INPROGRESS)
@@ -538,9 +531,7 @@ ExecBitmapHeapInitializeDSM(BitmapHeapScanState *node,
 
 	pstate->tbmiterator = 0;
 
-	/* Initialize the mutex */
-	SpinLockInit(&pstate->mutex);
-	pstate->state = BM_INITIAL;
+	pg_atomic_init_u32(&pstate->state, BM_INITIAL);
 
 	ConditionVariableInit(&pstate->cv);
 
@@ -565,7 +556,7 @@ ExecBitmapHeapReInitializeDSM(BitmapHeapScanState *node,
 	if (dsa == NULL)
 		return;
 
-	pstate->state = BM_INITIAL;
+	pg_atomic_write_u32(&pstate->state, BM_INITIAL);
 
 	if (DsaPointerIsValid(pstate->tbmiterator))
 		tbm_free_shared_area(dsa, pstate->tbmiterator);
-- 
2.50.1 (Apple Git-155)


--Ot5x3ffkWEuxilWO
Content-Type: text/plain; charset=us-ascii
Content-Disposition: attachment;
	filename=v1-0003-convert-FixedParallelState-last_xlog_end-to-an-at.patch



^ permalink  raw  reply  [nested|flat] 440+ messages in thread

* [PATCH v2 2/9] convert ParallelBitmapHeapState->state to an atomic
@ 2026-07-09 18:38 Nathan Bossart <nathan@postgresql.org>
  0 siblings, 0 replies; 440+ messages in thread

From: Nathan Bossart @ 2026-07-09 18:38 UTC (permalink / raw)

---
 src/backend/executor/nodeBitmapHeapscan.c | 23 +++++++----------------
 1 file changed, 7 insertions(+), 16 deletions(-)

diff --git a/src/backend/executor/nodeBitmapHeapscan.c b/src/backend/executor/nodeBitmapHeapscan.c
index 83d6478bc2b..a9e83f30687 100644
--- a/src/backend/executor/nodeBitmapHeapscan.c
+++ b/src/backend/executor/nodeBitmapHeapscan.c
@@ -79,7 +79,6 @@ typedef enum
 /* ----------------
  *	 ParallelBitmapHeapState information
  *		tbmiterator				iterator for scanning current pages
- *		mutex					mutual exclusion for state
  *		state					current state of the TIDBitmap
  *		cv						conditional wait variable
  * ----------------
@@ -87,8 +86,7 @@ typedef enum
 typedef struct ParallelBitmapHeapState
 {
 	dsa_pointer tbmiterator;
-	slock_t		mutex;
-	SharedBitmapState state;
+	pg_atomic_uint32 state;
 	ConditionVariable cv;
 } ParallelBitmapHeapState;
 
@@ -228,9 +226,7 @@ BitmapHeapNext(BitmapHeapScanState *node)
 static inline void
 BitmapDoneInitializingSharedState(ParallelBitmapHeapState *pstate)
 {
-	SpinLockAcquire(&pstate->mutex);
-	pstate->state = BM_FINISHED;
-	SpinLockRelease(&pstate->mutex);
+	pg_atomic_write_membarrier_u32(&pstate->state, BM_FINISHED);
 	ConditionVariableBroadcast(&pstate->cv);
 }
 
@@ -476,15 +472,12 @@ ExecInitBitmapHeapScan(BitmapHeapScan *node, EState *estate, int eflags)
 static bool
 BitmapShouldInitializeSharedState(ParallelBitmapHeapState *pstate)
 {
-	SharedBitmapState state;
+	uint32		state;
 
 	while (1)
 	{
-		SpinLockAcquire(&pstate->mutex);
-		state = pstate->state;
-		if (pstate->state == BM_INITIAL)
-			pstate->state = BM_INPROGRESS;
-		SpinLockRelease(&pstate->mutex);
+		state = BM_INITIAL;
+		pg_atomic_compare_exchange_u32(&pstate->state, &state, BM_INPROGRESS);
 
 		/* Exit if bitmap is done, or if we're the leader. */
 		if (state != BM_INPROGRESS)
@@ -538,9 +531,7 @@ ExecBitmapHeapInitializeDSM(BitmapHeapScanState *node,
 
 	pstate->tbmiterator = 0;
 
-	/* Initialize the mutex */
-	SpinLockInit(&pstate->mutex);
-	pstate->state = BM_INITIAL;
+	pg_atomic_init_u32(&pstate->state, BM_INITIAL);
 
 	ConditionVariableInit(&pstate->cv);
 
@@ -565,7 +556,7 @@ ExecBitmapHeapReInitializeDSM(BitmapHeapScanState *node,
 	if (dsa == NULL)
 		return;
 
-	pstate->state = BM_INITIAL;
+	pg_atomic_write_u32(&pstate->state, BM_INITIAL);
 
 	if (DsaPointerIsValid(pstate->tbmiterator))
 		tbm_free_shared_area(dsa, pstate->tbmiterator);
-- 
2.50.1 (Apple Git-155)


--Xf36GNcW+0xZNily
Content-Type: text/plain; charset=us-ascii
Content-Disposition: attachment;
	filename=v2-0003-convert-FixedParallelState-last_xlog_end-to-an-at.patch



^ permalink  raw  reply  [nested|flat] 440+ messages in thread

* [PATCH v2 2/9] convert ParallelBitmapHeapState->state to an atomic
@ 2026-07-09 18:38 Nathan Bossart <nathan@postgresql.org>
  0 siblings, 0 replies; 440+ messages in thread

From: Nathan Bossart @ 2026-07-09 18:38 UTC (permalink / raw)

---
 src/backend/executor/nodeBitmapHeapscan.c | 23 +++++++----------------
 1 file changed, 7 insertions(+), 16 deletions(-)

diff --git a/src/backend/executor/nodeBitmapHeapscan.c b/src/backend/executor/nodeBitmapHeapscan.c
index 83d6478bc2b..a9e83f30687 100644
--- a/src/backend/executor/nodeBitmapHeapscan.c
+++ b/src/backend/executor/nodeBitmapHeapscan.c
@@ -79,7 +79,6 @@ typedef enum
 /* ----------------
  *	 ParallelBitmapHeapState information
  *		tbmiterator				iterator for scanning current pages
- *		mutex					mutual exclusion for state
  *		state					current state of the TIDBitmap
  *		cv						conditional wait variable
  * ----------------
@@ -87,8 +86,7 @@ typedef enum
 typedef struct ParallelBitmapHeapState
 {
 	dsa_pointer tbmiterator;
-	slock_t		mutex;
-	SharedBitmapState state;
+	pg_atomic_uint32 state;
 	ConditionVariable cv;
 } ParallelBitmapHeapState;
 
@@ -228,9 +226,7 @@ BitmapHeapNext(BitmapHeapScanState *node)
 static inline void
 BitmapDoneInitializingSharedState(ParallelBitmapHeapState *pstate)
 {
-	SpinLockAcquire(&pstate->mutex);
-	pstate->state = BM_FINISHED;
-	SpinLockRelease(&pstate->mutex);
+	pg_atomic_write_membarrier_u32(&pstate->state, BM_FINISHED);
 	ConditionVariableBroadcast(&pstate->cv);
 }
 
@@ -476,15 +472,12 @@ ExecInitBitmapHeapScan(BitmapHeapScan *node, EState *estate, int eflags)
 static bool
 BitmapShouldInitializeSharedState(ParallelBitmapHeapState *pstate)
 {
-	SharedBitmapState state;
+	uint32		state;
 
 	while (1)
 	{
-		SpinLockAcquire(&pstate->mutex);
-		state = pstate->state;
-		if (pstate->state == BM_INITIAL)
-			pstate->state = BM_INPROGRESS;
-		SpinLockRelease(&pstate->mutex);
+		state = BM_INITIAL;
+		pg_atomic_compare_exchange_u32(&pstate->state, &state, BM_INPROGRESS);
 
 		/* Exit if bitmap is done, or if we're the leader. */
 		if (state != BM_INPROGRESS)
@@ -538,9 +531,7 @@ ExecBitmapHeapInitializeDSM(BitmapHeapScanState *node,
 
 	pstate->tbmiterator = 0;
 
-	/* Initialize the mutex */
-	SpinLockInit(&pstate->mutex);
-	pstate->state = BM_INITIAL;
+	pg_atomic_init_u32(&pstate->state, BM_INITIAL);
 
 	ConditionVariableInit(&pstate->cv);
 
@@ -565,7 +556,7 @@ ExecBitmapHeapReInitializeDSM(BitmapHeapScanState *node,
 	if (dsa == NULL)
 		return;
 
-	pstate->state = BM_INITIAL;
+	pg_atomic_write_u32(&pstate->state, BM_INITIAL);
 
 	if (DsaPointerIsValid(pstate->tbmiterator))
 		tbm_free_shared_area(dsa, pstate->tbmiterator);
-- 
2.50.1 (Apple Git-155)


--Xf36GNcW+0xZNily
Content-Type: text/plain; charset=us-ascii
Content-Disposition: attachment;
	filename=v2-0003-convert-FixedParallelState-last_xlog_end-to-an-at.patch



^ permalink  raw  reply  [nested|flat] 440+ messages in thread

* [PATCH v1 2/8] convert ParallelBitmapHeapState->state to an atomic
@ 2026-07-09 18:38 Nathan Bossart <nathan@postgresql.org>
  0 siblings, 0 replies; 440+ messages in thread

From: Nathan Bossart @ 2026-07-09 18:38 UTC (permalink / raw)

---
 src/backend/executor/nodeBitmapHeapscan.c | 21 ++++++---------------
 1 file changed, 6 insertions(+), 15 deletions(-)

diff --git a/src/backend/executor/nodeBitmapHeapscan.c b/src/backend/executor/nodeBitmapHeapscan.c
index 83d6478bc2b..f2bb487bf10 100644
--- a/src/backend/executor/nodeBitmapHeapscan.c
+++ b/src/backend/executor/nodeBitmapHeapscan.c
@@ -79,7 +79,6 @@ typedef enum
 /* ----------------
  *	 ParallelBitmapHeapState information
  *		tbmiterator				iterator for scanning current pages
- *		mutex					mutual exclusion for state
  *		state					current state of the TIDBitmap
  *		cv						conditional wait variable
  * ----------------
@@ -87,8 +86,7 @@ typedef enum
 typedef struct ParallelBitmapHeapState
 {
 	dsa_pointer tbmiterator;
-	slock_t		mutex;
-	SharedBitmapState state;
+	pg_atomic_uint32 state;
 	ConditionVariable cv;
 } ParallelBitmapHeapState;
 
@@ -228,9 +226,7 @@ BitmapHeapNext(BitmapHeapScanState *node)
 static inline void
 BitmapDoneInitializingSharedState(ParallelBitmapHeapState *pstate)
 {
-	SpinLockAcquire(&pstate->mutex);
-	pstate->state = BM_FINISHED;
-	SpinLockRelease(&pstate->mutex);
+	pg_atomic_write_membarrier_u32(&pstate->state, BM_FINISHED);
 	ConditionVariableBroadcast(&pstate->cv);
 }
 
@@ -480,11 +476,8 @@ BitmapShouldInitializeSharedState(ParallelBitmapHeapState *pstate)
 
 	while (1)
 	{
-		SpinLockAcquire(&pstate->mutex);
-		state = pstate->state;
-		if (pstate->state == BM_INITIAL)
-			pstate->state = BM_INPROGRESS;
-		SpinLockRelease(&pstate->mutex);
+		state = BM_INITIAL;
+		pg_atomic_compare_exchange_u32(&pstate->state, &state, BM_INPROGRESS);
 
 		/* Exit if bitmap is done, or if we're the leader. */
 		if (state != BM_INPROGRESS)
@@ -538,9 +531,7 @@ ExecBitmapHeapInitializeDSM(BitmapHeapScanState *node,
 
 	pstate->tbmiterator = 0;
 
-	/* Initialize the mutex */
-	SpinLockInit(&pstate->mutex);
-	pstate->state = BM_INITIAL;
+	pg_atomic_init_u32(&pstate->state, BM_INITIAL);
 
 	ConditionVariableInit(&pstate->cv);
 
@@ -565,7 +556,7 @@ ExecBitmapHeapReInitializeDSM(BitmapHeapScanState *node,
 	if (dsa == NULL)
 		return;
 
-	pstate->state = BM_INITIAL;
+	pg_atomic_write_u32(&pstate->state, BM_INITIAL);
 
 	if (DsaPointerIsValid(pstate->tbmiterator))
 		tbm_free_shared_area(dsa, pstate->tbmiterator);
-- 
2.50.1 (Apple Git-155)


--Ot5x3ffkWEuxilWO
Content-Type: text/plain; charset=us-ascii
Content-Disposition: attachment;
	filename=v1-0003-convert-FixedParallelState-last_xlog_end-to-an-at.patch



^ permalink  raw  reply  [nested|flat] 440+ messages in thread

* [PATCH v1 2/8] convert ParallelBitmapHeapState->state to an atomic
@ 2026-07-09 18:38 Nathan Bossart <nathan@postgresql.org>
  0 siblings, 0 replies; 440+ messages in thread

From: Nathan Bossart @ 2026-07-09 18:38 UTC (permalink / raw)

---
 src/backend/executor/nodeBitmapHeapscan.c | 21 ++++++---------------
 1 file changed, 6 insertions(+), 15 deletions(-)

diff --git a/src/backend/executor/nodeBitmapHeapscan.c b/src/backend/executor/nodeBitmapHeapscan.c
index 83d6478bc2b..f2bb487bf10 100644
--- a/src/backend/executor/nodeBitmapHeapscan.c
+++ b/src/backend/executor/nodeBitmapHeapscan.c
@@ -79,7 +79,6 @@ typedef enum
 /* ----------------
  *	 ParallelBitmapHeapState information
  *		tbmiterator				iterator for scanning current pages
- *		mutex					mutual exclusion for state
  *		state					current state of the TIDBitmap
  *		cv						conditional wait variable
  * ----------------
@@ -87,8 +86,7 @@ typedef enum
 typedef struct ParallelBitmapHeapState
 {
 	dsa_pointer tbmiterator;
-	slock_t		mutex;
-	SharedBitmapState state;
+	pg_atomic_uint32 state;
 	ConditionVariable cv;
 } ParallelBitmapHeapState;
 
@@ -228,9 +226,7 @@ BitmapHeapNext(BitmapHeapScanState *node)
 static inline void
 BitmapDoneInitializingSharedState(ParallelBitmapHeapState *pstate)
 {
-	SpinLockAcquire(&pstate->mutex);
-	pstate->state = BM_FINISHED;
-	SpinLockRelease(&pstate->mutex);
+	pg_atomic_write_membarrier_u32(&pstate->state, BM_FINISHED);
 	ConditionVariableBroadcast(&pstate->cv);
 }
 
@@ -480,11 +476,8 @@ BitmapShouldInitializeSharedState(ParallelBitmapHeapState *pstate)
 
 	while (1)
 	{
-		SpinLockAcquire(&pstate->mutex);
-		state = pstate->state;
-		if (pstate->state == BM_INITIAL)
-			pstate->state = BM_INPROGRESS;
-		SpinLockRelease(&pstate->mutex);
+		state = BM_INITIAL;
+		pg_atomic_compare_exchange_u32(&pstate->state, &state, BM_INPROGRESS);
 
 		/* Exit if bitmap is done, or if we're the leader. */
 		if (state != BM_INPROGRESS)
@@ -538,9 +531,7 @@ ExecBitmapHeapInitializeDSM(BitmapHeapScanState *node,
 
 	pstate->tbmiterator = 0;
 
-	/* Initialize the mutex */
-	SpinLockInit(&pstate->mutex);
-	pstate->state = BM_INITIAL;
+	pg_atomic_init_u32(&pstate->state, BM_INITIAL);
 
 	ConditionVariableInit(&pstate->cv);
 
@@ -565,7 +556,7 @@ ExecBitmapHeapReInitializeDSM(BitmapHeapScanState *node,
 	if (dsa == NULL)
 		return;
 
-	pstate->state = BM_INITIAL;
+	pg_atomic_write_u32(&pstate->state, BM_INITIAL);
 
 	if (DsaPointerIsValid(pstate->tbmiterator))
 		tbm_free_shared_area(dsa, pstate->tbmiterator);
-- 
2.50.1 (Apple Git-155)


--Ot5x3ffkWEuxilWO
Content-Type: text/plain; charset=us-ascii
Content-Disposition: attachment;
	filename=v1-0003-convert-FixedParallelState-last_xlog_end-to-an-at.patch



^ permalink  raw  reply  [nested|flat] 440+ messages in thread

* [PATCH v2 2/9] convert ParallelBitmapHeapState->state to an atomic
@ 2026-07-09 18:38 Nathan Bossart <nathan@postgresql.org>
  0 siblings, 0 replies; 440+ messages in thread

From: Nathan Bossart @ 2026-07-09 18:38 UTC (permalink / raw)

---
 src/backend/executor/nodeBitmapHeapscan.c | 23 +++++++----------------
 1 file changed, 7 insertions(+), 16 deletions(-)

diff --git a/src/backend/executor/nodeBitmapHeapscan.c b/src/backend/executor/nodeBitmapHeapscan.c
index 83d6478bc2b..a9e83f30687 100644
--- a/src/backend/executor/nodeBitmapHeapscan.c
+++ b/src/backend/executor/nodeBitmapHeapscan.c
@@ -79,7 +79,6 @@ typedef enum
 /* ----------------
  *	 ParallelBitmapHeapState information
  *		tbmiterator				iterator for scanning current pages
- *		mutex					mutual exclusion for state
  *		state					current state of the TIDBitmap
  *		cv						conditional wait variable
  * ----------------
@@ -87,8 +86,7 @@ typedef enum
 typedef struct ParallelBitmapHeapState
 {
 	dsa_pointer tbmiterator;
-	slock_t		mutex;
-	SharedBitmapState state;
+	pg_atomic_uint32 state;
 	ConditionVariable cv;
 } ParallelBitmapHeapState;
 
@@ -228,9 +226,7 @@ BitmapHeapNext(BitmapHeapScanState *node)
 static inline void
 BitmapDoneInitializingSharedState(ParallelBitmapHeapState *pstate)
 {
-	SpinLockAcquire(&pstate->mutex);
-	pstate->state = BM_FINISHED;
-	SpinLockRelease(&pstate->mutex);
+	pg_atomic_write_membarrier_u32(&pstate->state, BM_FINISHED);
 	ConditionVariableBroadcast(&pstate->cv);
 }
 
@@ -476,15 +472,12 @@ ExecInitBitmapHeapScan(BitmapHeapScan *node, EState *estate, int eflags)
 static bool
 BitmapShouldInitializeSharedState(ParallelBitmapHeapState *pstate)
 {
-	SharedBitmapState state;
+	uint32		state;
 
 	while (1)
 	{
-		SpinLockAcquire(&pstate->mutex);
-		state = pstate->state;
-		if (pstate->state == BM_INITIAL)
-			pstate->state = BM_INPROGRESS;
-		SpinLockRelease(&pstate->mutex);
+		state = BM_INITIAL;
+		pg_atomic_compare_exchange_u32(&pstate->state, &state, BM_INPROGRESS);
 
 		/* Exit if bitmap is done, or if we're the leader. */
 		if (state != BM_INPROGRESS)
@@ -538,9 +531,7 @@ ExecBitmapHeapInitializeDSM(BitmapHeapScanState *node,
 
 	pstate->tbmiterator = 0;
 
-	/* Initialize the mutex */
-	SpinLockInit(&pstate->mutex);
-	pstate->state = BM_INITIAL;
+	pg_atomic_init_u32(&pstate->state, BM_INITIAL);
 
 	ConditionVariableInit(&pstate->cv);
 
@@ -565,7 +556,7 @@ ExecBitmapHeapReInitializeDSM(BitmapHeapScanState *node,
 	if (dsa == NULL)
 		return;
 
-	pstate->state = BM_INITIAL;
+	pg_atomic_write_u32(&pstate->state, BM_INITIAL);
 
 	if (DsaPointerIsValid(pstate->tbmiterator))
 		tbm_free_shared_area(dsa, pstate->tbmiterator);
-- 
2.50.1 (Apple Git-155)


--Xf36GNcW+0xZNily
Content-Type: text/plain; charset=us-ascii
Content-Disposition: attachment;
	filename=v2-0003-convert-FixedParallelState-last_xlog_end-to-an-at.patch



^ permalink  raw  reply  [nested|flat] 440+ messages in thread

* [PATCH v2 2/9] convert ParallelBitmapHeapState->state to an atomic
@ 2026-07-09 18:38 Nathan Bossart <nathan@postgresql.org>
  0 siblings, 0 replies; 440+ messages in thread

From: Nathan Bossart @ 2026-07-09 18:38 UTC (permalink / raw)

---
 src/backend/executor/nodeBitmapHeapscan.c | 23 +++++++----------------
 1 file changed, 7 insertions(+), 16 deletions(-)

diff --git a/src/backend/executor/nodeBitmapHeapscan.c b/src/backend/executor/nodeBitmapHeapscan.c
index 83d6478bc2b..a9e83f30687 100644
--- a/src/backend/executor/nodeBitmapHeapscan.c
+++ b/src/backend/executor/nodeBitmapHeapscan.c
@@ -79,7 +79,6 @@ typedef enum
 /* ----------------
  *	 ParallelBitmapHeapState information
  *		tbmiterator				iterator for scanning current pages
- *		mutex					mutual exclusion for state
  *		state					current state of the TIDBitmap
  *		cv						conditional wait variable
  * ----------------
@@ -87,8 +86,7 @@ typedef enum
 typedef struct ParallelBitmapHeapState
 {
 	dsa_pointer tbmiterator;
-	slock_t		mutex;
-	SharedBitmapState state;
+	pg_atomic_uint32 state;
 	ConditionVariable cv;
 } ParallelBitmapHeapState;
 
@@ -228,9 +226,7 @@ BitmapHeapNext(BitmapHeapScanState *node)
 static inline void
 BitmapDoneInitializingSharedState(ParallelBitmapHeapState *pstate)
 {
-	SpinLockAcquire(&pstate->mutex);
-	pstate->state = BM_FINISHED;
-	SpinLockRelease(&pstate->mutex);
+	pg_atomic_write_membarrier_u32(&pstate->state, BM_FINISHED);
 	ConditionVariableBroadcast(&pstate->cv);
 }
 
@@ -476,15 +472,12 @@ ExecInitBitmapHeapScan(BitmapHeapScan *node, EState *estate, int eflags)
 static bool
 BitmapShouldInitializeSharedState(ParallelBitmapHeapState *pstate)
 {
-	SharedBitmapState state;
+	uint32		state;
 
 	while (1)
 	{
-		SpinLockAcquire(&pstate->mutex);
-		state = pstate->state;
-		if (pstate->state == BM_INITIAL)
-			pstate->state = BM_INPROGRESS;
-		SpinLockRelease(&pstate->mutex);
+		state = BM_INITIAL;
+		pg_atomic_compare_exchange_u32(&pstate->state, &state, BM_INPROGRESS);
 
 		/* Exit if bitmap is done, or if we're the leader. */
 		if (state != BM_INPROGRESS)
@@ -538,9 +531,7 @@ ExecBitmapHeapInitializeDSM(BitmapHeapScanState *node,
 
 	pstate->tbmiterator = 0;
 
-	/* Initialize the mutex */
-	SpinLockInit(&pstate->mutex);
-	pstate->state = BM_INITIAL;
+	pg_atomic_init_u32(&pstate->state, BM_INITIAL);
 
 	ConditionVariableInit(&pstate->cv);
 
@@ -565,7 +556,7 @@ ExecBitmapHeapReInitializeDSM(BitmapHeapScanState *node,
 	if (dsa == NULL)
 		return;
 
-	pstate->state = BM_INITIAL;
+	pg_atomic_write_u32(&pstate->state, BM_INITIAL);
 
 	if (DsaPointerIsValid(pstate->tbmiterator))
 		tbm_free_shared_area(dsa, pstate->tbmiterator);
-- 
2.50.1 (Apple Git-155)


--Xf36GNcW+0xZNily
Content-Type: text/plain; charset=us-ascii
Content-Disposition: attachment;
	filename=v2-0003-convert-FixedParallelState-last_xlog_end-to-an-at.patch



^ permalink  raw  reply  [nested|flat] 440+ messages in thread

* [PATCH v2 2/9] convert ParallelBitmapHeapState->state to an atomic
@ 2026-07-09 18:38 Nathan Bossart <nathan@postgresql.org>
  0 siblings, 0 replies; 440+ messages in thread

From: Nathan Bossart @ 2026-07-09 18:38 UTC (permalink / raw)

---
 src/backend/executor/nodeBitmapHeapscan.c | 23 +++++++----------------
 1 file changed, 7 insertions(+), 16 deletions(-)

diff --git a/src/backend/executor/nodeBitmapHeapscan.c b/src/backend/executor/nodeBitmapHeapscan.c
index 83d6478bc2b..a9e83f30687 100644
--- a/src/backend/executor/nodeBitmapHeapscan.c
+++ b/src/backend/executor/nodeBitmapHeapscan.c
@@ -79,7 +79,6 @@ typedef enum
 /* ----------------
  *	 ParallelBitmapHeapState information
  *		tbmiterator				iterator for scanning current pages
- *		mutex					mutual exclusion for state
  *		state					current state of the TIDBitmap
  *		cv						conditional wait variable
  * ----------------
@@ -87,8 +86,7 @@ typedef enum
 typedef struct ParallelBitmapHeapState
 {
 	dsa_pointer tbmiterator;
-	slock_t		mutex;
-	SharedBitmapState state;
+	pg_atomic_uint32 state;
 	ConditionVariable cv;
 } ParallelBitmapHeapState;
 
@@ -228,9 +226,7 @@ BitmapHeapNext(BitmapHeapScanState *node)
 static inline void
 BitmapDoneInitializingSharedState(ParallelBitmapHeapState *pstate)
 {
-	SpinLockAcquire(&pstate->mutex);
-	pstate->state = BM_FINISHED;
-	SpinLockRelease(&pstate->mutex);
+	pg_atomic_write_membarrier_u32(&pstate->state, BM_FINISHED);
 	ConditionVariableBroadcast(&pstate->cv);
 }
 
@@ -476,15 +472,12 @@ ExecInitBitmapHeapScan(BitmapHeapScan *node, EState *estate, int eflags)
 static bool
 BitmapShouldInitializeSharedState(ParallelBitmapHeapState *pstate)
 {
-	SharedBitmapState state;
+	uint32		state;
 
 	while (1)
 	{
-		SpinLockAcquire(&pstate->mutex);
-		state = pstate->state;
-		if (pstate->state == BM_INITIAL)
-			pstate->state = BM_INPROGRESS;
-		SpinLockRelease(&pstate->mutex);
+		state = BM_INITIAL;
+		pg_atomic_compare_exchange_u32(&pstate->state, &state, BM_INPROGRESS);
 
 		/* Exit if bitmap is done, or if we're the leader. */
 		if (state != BM_INPROGRESS)
@@ -538,9 +531,7 @@ ExecBitmapHeapInitializeDSM(BitmapHeapScanState *node,
 
 	pstate->tbmiterator = 0;
 
-	/* Initialize the mutex */
-	SpinLockInit(&pstate->mutex);
-	pstate->state = BM_INITIAL;
+	pg_atomic_init_u32(&pstate->state, BM_INITIAL);
 
 	ConditionVariableInit(&pstate->cv);
 
@@ -565,7 +556,7 @@ ExecBitmapHeapReInitializeDSM(BitmapHeapScanState *node,
 	if (dsa == NULL)
 		return;
 
-	pstate->state = BM_INITIAL;
+	pg_atomic_write_u32(&pstate->state, BM_INITIAL);
 
 	if (DsaPointerIsValid(pstate->tbmiterator))
 		tbm_free_shared_area(dsa, pstate->tbmiterator);
-- 
2.50.1 (Apple Git-155)


--Xf36GNcW+0xZNily
Content-Type: text/plain; charset=us-ascii
Content-Disposition: attachment;
	filename=v2-0003-convert-FixedParallelState-last_xlog_end-to-an-at.patch



^ permalink  raw  reply  [nested|flat] 440+ messages in thread

* [PATCH v2 2/9] convert ParallelBitmapHeapState->state to an atomic
@ 2026-07-09 18:38 Nathan Bossart <nathan@postgresql.org>
  0 siblings, 0 replies; 440+ messages in thread

From: Nathan Bossart @ 2026-07-09 18:38 UTC (permalink / raw)

---
 src/backend/executor/nodeBitmapHeapscan.c | 23 +++++++----------------
 1 file changed, 7 insertions(+), 16 deletions(-)

diff --git a/src/backend/executor/nodeBitmapHeapscan.c b/src/backend/executor/nodeBitmapHeapscan.c
index 83d6478bc2b..a9e83f30687 100644
--- a/src/backend/executor/nodeBitmapHeapscan.c
+++ b/src/backend/executor/nodeBitmapHeapscan.c
@@ -79,7 +79,6 @@ typedef enum
 /* ----------------
  *	 ParallelBitmapHeapState information
  *		tbmiterator				iterator for scanning current pages
- *		mutex					mutual exclusion for state
  *		state					current state of the TIDBitmap
  *		cv						conditional wait variable
  * ----------------
@@ -87,8 +86,7 @@ typedef enum
 typedef struct ParallelBitmapHeapState
 {
 	dsa_pointer tbmiterator;
-	slock_t		mutex;
-	SharedBitmapState state;
+	pg_atomic_uint32 state;
 	ConditionVariable cv;
 } ParallelBitmapHeapState;
 
@@ -228,9 +226,7 @@ BitmapHeapNext(BitmapHeapScanState *node)
 static inline void
 BitmapDoneInitializingSharedState(ParallelBitmapHeapState *pstate)
 {
-	SpinLockAcquire(&pstate->mutex);
-	pstate->state = BM_FINISHED;
-	SpinLockRelease(&pstate->mutex);
+	pg_atomic_write_membarrier_u32(&pstate->state, BM_FINISHED);
 	ConditionVariableBroadcast(&pstate->cv);
 }
 
@@ -476,15 +472,12 @@ ExecInitBitmapHeapScan(BitmapHeapScan *node, EState *estate, int eflags)
 static bool
 BitmapShouldInitializeSharedState(ParallelBitmapHeapState *pstate)
 {
-	SharedBitmapState state;
+	uint32		state;
 
 	while (1)
 	{
-		SpinLockAcquire(&pstate->mutex);
-		state = pstate->state;
-		if (pstate->state == BM_INITIAL)
-			pstate->state = BM_INPROGRESS;
-		SpinLockRelease(&pstate->mutex);
+		state = BM_INITIAL;
+		pg_atomic_compare_exchange_u32(&pstate->state, &state, BM_INPROGRESS);
 
 		/* Exit if bitmap is done, or if we're the leader. */
 		if (state != BM_INPROGRESS)
@@ -538,9 +531,7 @@ ExecBitmapHeapInitializeDSM(BitmapHeapScanState *node,
 
 	pstate->tbmiterator = 0;
 
-	/* Initialize the mutex */
-	SpinLockInit(&pstate->mutex);
-	pstate->state = BM_INITIAL;
+	pg_atomic_init_u32(&pstate->state, BM_INITIAL);
 
 	ConditionVariableInit(&pstate->cv);
 
@@ -565,7 +556,7 @@ ExecBitmapHeapReInitializeDSM(BitmapHeapScanState *node,
 	if (dsa == NULL)
 		return;
 
-	pstate->state = BM_INITIAL;
+	pg_atomic_write_u32(&pstate->state, BM_INITIAL);
 
 	if (DsaPointerIsValid(pstate->tbmiterator))
 		tbm_free_shared_area(dsa, pstate->tbmiterator);
-- 
2.50.1 (Apple Git-155)


--Xf36GNcW+0xZNily
Content-Type: text/plain; charset=us-ascii
Content-Disposition: attachment;
	filename=v2-0003-convert-FixedParallelState-last_xlog_end-to-an-at.patch



^ permalink  raw  reply  [nested|flat] 440+ messages in thread

* [PATCH v2 2/9] convert ParallelBitmapHeapState->state to an atomic
@ 2026-07-09 18:38 Nathan Bossart <nathan@postgresql.org>
  0 siblings, 0 replies; 440+ messages in thread

From: Nathan Bossart @ 2026-07-09 18:38 UTC (permalink / raw)

---
 src/backend/executor/nodeBitmapHeapscan.c | 23 +++++++----------------
 1 file changed, 7 insertions(+), 16 deletions(-)

diff --git a/src/backend/executor/nodeBitmapHeapscan.c b/src/backend/executor/nodeBitmapHeapscan.c
index 83d6478bc2b..a9e83f30687 100644
--- a/src/backend/executor/nodeBitmapHeapscan.c
+++ b/src/backend/executor/nodeBitmapHeapscan.c
@@ -79,7 +79,6 @@ typedef enum
 /* ----------------
  *	 ParallelBitmapHeapState information
  *		tbmiterator				iterator for scanning current pages
- *		mutex					mutual exclusion for state
  *		state					current state of the TIDBitmap
  *		cv						conditional wait variable
  * ----------------
@@ -87,8 +86,7 @@ typedef enum
 typedef struct ParallelBitmapHeapState
 {
 	dsa_pointer tbmiterator;
-	slock_t		mutex;
-	SharedBitmapState state;
+	pg_atomic_uint32 state;
 	ConditionVariable cv;
 } ParallelBitmapHeapState;
 
@@ -228,9 +226,7 @@ BitmapHeapNext(BitmapHeapScanState *node)
 static inline void
 BitmapDoneInitializingSharedState(ParallelBitmapHeapState *pstate)
 {
-	SpinLockAcquire(&pstate->mutex);
-	pstate->state = BM_FINISHED;
-	SpinLockRelease(&pstate->mutex);
+	pg_atomic_write_membarrier_u32(&pstate->state, BM_FINISHED);
 	ConditionVariableBroadcast(&pstate->cv);
 }
 
@@ -476,15 +472,12 @@ ExecInitBitmapHeapScan(BitmapHeapScan *node, EState *estate, int eflags)
 static bool
 BitmapShouldInitializeSharedState(ParallelBitmapHeapState *pstate)
 {
-	SharedBitmapState state;
+	uint32		state;
 
 	while (1)
 	{
-		SpinLockAcquire(&pstate->mutex);
-		state = pstate->state;
-		if (pstate->state == BM_INITIAL)
-			pstate->state = BM_INPROGRESS;
-		SpinLockRelease(&pstate->mutex);
+		state = BM_INITIAL;
+		pg_atomic_compare_exchange_u32(&pstate->state, &state, BM_INPROGRESS);
 
 		/* Exit if bitmap is done, or if we're the leader. */
 		if (state != BM_INPROGRESS)
@@ -538,9 +531,7 @@ ExecBitmapHeapInitializeDSM(BitmapHeapScanState *node,
 
 	pstate->tbmiterator = 0;
 
-	/* Initialize the mutex */
-	SpinLockInit(&pstate->mutex);
-	pstate->state = BM_INITIAL;
+	pg_atomic_init_u32(&pstate->state, BM_INITIAL);
 
 	ConditionVariableInit(&pstate->cv);
 
@@ -565,7 +556,7 @@ ExecBitmapHeapReInitializeDSM(BitmapHeapScanState *node,
 	if (dsa == NULL)
 		return;
 
-	pstate->state = BM_INITIAL;
+	pg_atomic_write_u32(&pstate->state, BM_INITIAL);
 
 	if (DsaPointerIsValid(pstate->tbmiterator))
 		tbm_free_shared_area(dsa, pstate->tbmiterator);
-- 
2.50.1 (Apple Git-155)


--Xf36GNcW+0xZNily
Content-Type: text/plain; charset=us-ascii
Content-Disposition: attachment;
	filename=v2-0003-convert-FixedParallelState-last_xlog_end-to-an-at.patch



^ permalink  raw  reply  [nested|flat] 440+ messages in thread

* [PATCH v1 2/8] convert ParallelBitmapHeapState->state to an atomic
@ 2026-07-09 18:38 Nathan Bossart <nathan@postgresql.org>
  0 siblings, 0 replies; 440+ messages in thread

From: Nathan Bossart @ 2026-07-09 18:38 UTC (permalink / raw)

---
 src/backend/executor/nodeBitmapHeapscan.c | 21 ++++++---------------
 1 file changed, 6 insertions(+), 15 deletions(-)

diff --git a/src/backend/executor/nodeBitmapHeapscan.c b/src/backend/executor/nodeBitmapHeapscan.c
index 83d6478bc2b..f2bb487bf10 100644
--- a/src/backend/executor/nodeBitmapHeapscan.c
+++ b/src/backend/executor/nodeBitmapHeapscan.c
@@ -79,7 +79,6 @@ typedef enum
 /* ----------------
  *	 ParallelBitmapHeapState information
  *		tbmiterator				iterator for scanning current pages
- *		mutex					mutual exclusion for state
  *		state					current state of the TIDBitmap
  *		cv						conditional wait variable
  * ----------------
@@ -87,8 +86,7 @@ typedef enum
 typedef struct ParallelBitmapHeapState
 {
 	dsa_pointer tbmiterator;
-	slock_t		mutex;
-	SharedBitmapState state;
+	pg_atomic_uint32 state;
 	ConditionVariable cv;
 } ParallelBitmapHeapState;
 
@@ -228,9 +226,7 @@ BitmapHeapNext(BitmapHeapScanState *node)
 static inline void
 BitmapDoneInitializingSharedState(ParallelBitmapHeapState *pstate)
 {
-	SpinLockAcquire(&pstate->mutex);
-	pstate->state = BM_FINISHED;
-	SpinLockRelease(&pstate->mutex);
+	pg_atomic_write_membarrier_u32(&pstate->state, BM_FINISHED);
 	ConditionVariableBroadcast(&pstate->cv);
 }
 
@@ -480,11 +476,8 @@ BitmapShouldInitializeSharedState(ParallelBitmapHeapState *pstate)
 
 	while (1)
 	{
-		SpinLockAcquire(&pstate->mutex);
-		state = pstate->state;
-		if (pstate->state == BM_INITIAL)
-			pstate->state = BM_INPROGRESS;
-		SpinLockRelease(&pstate->mutex);
+		state = BM_INITIAL;
+		pg_atomic_compare_exchange_u32(&pstate->state, &state, BM_INPROGRESS);
 
 		/* Exit if bitmap is done, or if we're the leader. */
 		if (state != BM_INPROGRESS)
@@ -538,9 +531,7 @@ ExecBitmapHeapInitializeDSM(BitmapHeapScanState *node,
 
 	pstate->tbmiterator = 0;
 
-	/* Initialize the mutex */
-	SpinLockInit(&pstate->mutex);
-	pstate->state = BM_INITIAL;
+	pg_atomic_init_u32(&pstate->state, BM_INITIAL);
 
 	ConditionVariableInit(&pstate->cv);
 
@@ -565,7 +556,7 @@ ExecBitmapHeapReInitializeDSM(BitmapHeapScanState *node,
 	if (dsa == NULL)
 		return;
 
-	pstate->state = BM_INITIAL;
+	pg_atomic_write_u32(&pstate->state, BM_INITIAL);
 
 	if (DsaPointerIsValid(pstate->tbmiterator))
 		tbm_free_shared_area(dsa, pstate->tbmiterator);
-- 
2.50.1 (Apple Git-155)


--Ot5x3ffkWEuxilWO
Content-Type: text/plain; charset=us-ascii
Content-Disposition: attachment;
	filename=v1-0003-convert-FixedParallelState-last_xlog_end-to-an-at.patch



^ permalink  raw  reply  [nested|flat] 440+ messages in thread

* [PATCH v1 2/8] convert ParallelBitmapHeapState->state to an atomic
@ 2026-07-09 18:38 Nathan Bossart <nathan@postgresql.org>
  0 siblings, 0 replies; 440+ messages in thread

From: Nathan Bossart @ 2026-07-09 18:38 UTC (permalink / raw)

---
 src/backend/executor/nodeBitmapHeapscan.c | 21 ++++++---------------
 1 file changed, 6 insertions(+), 15 deletions(-)

diff --git a/src/backend/executor/nodeBitmapHeapscan.c b/src/backend/executor/nodeBitmapHeapscan.c
index 83d6478bc2b..f2bb487bf10 100644
--- a/src/backend/executor/nodeBitmapHeapscan.c
+++ b/src/backend/executor/nodeBitmapHeapscan.c
@@ -79,7 +79,6 @@ typedef enum
 /* ----------------
  *	 ParallelBitmapHeapState information
  *		tbmiterator				iterator for scanning current pages
- *		mutex					mutual exclusion for state
  *		state					current state of the TIDBitmap
  *		cv						conditional wait variable
  * ----------------
@@ -87,8 +86,7 @@ typedef enum
 typedef struct ParallelBitmapHeapState
 {
 	dsa_pointer tbmiterator;
-	slock_t		mutex;
-	SharedBitmapState state;
+	pg_atomic_uint32 state;
 	ConditionVariable cv;
 } ParallelBitmapHeapState;
 
@@ -228,9 +226,7 @@ BitmapHeapNext(BitmapHeapScanState *node)
 static inline void
 BitmapDoneInitializingSharedState(ParallelBitmapHeapState *pstate)
 {
-	SpinLockAcquire(&pstate->mutex);
-	pstate->state = BM_FINISHED;
-	SpinLockRelease(&pstate->mutex);
+	pg_atomic_write_membarrier_u32(&pstate->state, BM_FINISHED);
 	ConditionVariableBroadcast(&pstate->cv);
 }
 
@@ -480,11 +476,8 @@ BitmapShouldInitializeSharedState(ParallelBitmapHeapState *pstate)
 
 	while (1)
 	{
-		SpinLockAcquire(&pstate->mutex);
-		state = pstate->state;
-		if (pstate->state == BM_INITIAL)
-			pstate->state = BM_INPROGRESS;
-		SpinLockRelease(&pstate->mutex);
+		state = BM_INITIAL;
+		pg_atomic_compare_exchange_u32(&pstate->state, &state, BM_INPROGRESS);
 
 		/* Exit if bitmap is done, or if we're the leader. */
 		if (state != BM_INPROGRESS)
@@ -538,9 +531,7 @@ ExecBitmapHeapInitializeDSM(BitmapHeapScanState *node,
 
 	pstate->tbmiterator = 0;
 
-	/* Initialize the mutex */
-	SpinLockInit(&pstate->mutex);
-	pstate->state = BM_INITIAL;
+	pg_atomic_init_u32(&pstate->state, BM_INITIAL);
 
 	ConditionVariableInit(&pstate->cv);
 
@@ -565,7 +556,7 @@ ExecBitmapHeapReInitializeDSM(BitmapHeapScanState *node,
 	if (dsa == NULL)
 		return;
 
-	pstate->state = BM_INITIAL;
+	pg_atomic_write_u32(&pstate->state, BM_INITIAL);
 
 	if (DsaPointerIsValid(pstate->tbmiterator))
 		tbm_free_shared_area(dsa, pstate->tbmiterator);
-- 
2.50.1 (Apple Git-155)


--Ot5x3ffkWEuxilWO
Content-Type: text/plain; charset=us-ascii
Content-Disposition: attachment;
	filename=v1-0003-convert-FixedParallelState-last_xlog_end-to-an-at.patch



^ permalink  raw  reply  [nested|flat] 440+ messages in thread

* [PATCH v2 2/9] convert ParallelBitmapHeapState->state to an atomic
@ 2026-07-09 18:38 Nathan Bossart <nathan@postgresql.org>
  0 siblings, 0 replies; 440+ messages in thread

From: Nathan Bossart @ 2026-07-09 18:38 UTC (permalink / raw)

---
 src/backend/executor/nodeBitmapHeapscan.c | 23 +++++++----------------
 1 file changed, 7 insertions(+), 16 deletions(-)

diff --git a/src/backend/executor/nodeBitmapHeapscan.c b/src/backend/executor/nodeBitmapHeapscan.c
index 83d6478bc2b..a9e83f30687 100644
--- a/src/backend/executor/nodeBitmapHeapscan.c
+++ b/src/backend/executor/nodeBitmapHeapscan.c
@@ -79,7 +79,6 @@ typedef enum
 /* ----------------
  *	 ParallelBitmapHeapState information
  *		tbmiterator				iterator for scanning current pages
- *		mutex					mutual exclusion for state
  *		state					current state of the TIDBitmap
  *		cv						conditional wait variable
  * ----------------
@@ -87,8 +86,7 @@ typedef enum
 typedef struct ParallelBitmapHeapState
 {
 	dsa_pointer tbmiterator;
-	slock_t		mutex;
-	SharedBitmapState state;
+	pg_atomic_uint32 state;
 	ConditionVariable cv;
 } ParallelBitmapHeapState;
 
@@ -228,9 +226,7 @@ BitmapHeapNext(BitmapHeapScanState *node)
 static inline void
 BitmapDoneInitializingSharedState(ParallelBitmapHeapState *pstate)
 {
-	SpinLockAcquire(&pstate->mutex);
-	pstate->state = BM_FINISHED;
-	SpinLockRelease(&pstate->mutex);
+	pg_atomic_write_membarrier_u32(&pstate->state, BM_FINISHED);
 	ConditionVariableBroadcast(&pstate->cv);
 }
 
@@ -476,15 +472,12 @@ ExecInitBitmapHeapScan(BitmapHeapScan *node, EState *estate, int eflags)
 static bool
 BitmapShouldInitializeSharedState(ParallelBitmapHeapState *pstate)
 {
-	SharedBitmapState state;
+	uint32		state;
 
 	while (1)
 	{
-		SpinLockAcquire(&pstate->mutex);
-		state = pstate->state;
-		if (pstate->state == BM_INITIAL)
-			pstate->state = BM_INPROGRESS;
-		SpinLockRelease(&pstate->mutex);
+		state = BM_INITIAL;
+		pg_atomic_compare_exchange_u32(&pstate->state, &state, BM_INPROGRESS);
 
 		/* Exit if bitmap is done, or if we're the leader. */
 		if (state != BM_INPROGRESS)
@@ -538,9 +531,7 @@ ExecBitmapHeapInitializeDSM(BitmapHeapScanState *node,
 
 	pstate->tbmiterator = 0;
 
-	/* Initialize the mutex */
-	SpinLockInit(&pstate->mutex);
-	pstate->state = BM_INITIAL;
+	pg_atomic_init_u32(&pstate->state, BM_INITIAL);
 
 	ConditionVariableInit(&pstate->cv);
 
@@ -565,7 +556,7 @@ ExecBitmapHeapReInitializeDSM(BitmapHeapScanState *node,
 	if (dsa == NULL)
 		return;
 
-	pstate->state = BM_INITIAL;
+	pg_atomic_write_u32(&pstate->state, BM_INITIAL);
 
 	if (DsaPointerIsValid(pstate->tbmiterator))
 		tbm_free_shared_area(dsa, pstate->tbmiterator);
-- 
2.50.1 (Apple Git-155)


--Xf36GNcW+0xZNily
Content-Type: text/plain; charset=us-ascii
Content-Disposition: attachment;
	filename=v2-0003-convert-FixedParallelState-last_xlog_end-to-an-at.patch



^ permalink  raw  reply  [nested|flat] 440+ messages in thread

* [PATCH v1 2/8] convert ParallelBitmapHeapState->state to an atomic
@ 2026-07-09 18:38 Nathan Bossart <nathan@postgresql.org>
  0 siblings, 0 replies; 440+ messages in thread

From: Nathan Bossart @ 2026-07-09 18:38 UTC (permalink / raw)

---
 src/backend/executor/nodeBitmapHeapscan.c | 21 ++++++---------------
 1 file changed, 6 insertions(+), 15 deletions(-)

diff --git a/src/backend/executor/nodeBitmapHeapscan.c b/src/backend/executor/nodeBitmapHeapscan.c
index 83d6478bc2b..f2bb487bf10 100644
--- a/src/backend/executor/nodeBitmapHeapscan.c
+++ b/src/backend/executor/nodeBitmapHeapscan.c
@@ -79,7 +79,6 @@ typedef enum
 /* ----------------
  *	 ParallelBitmapHeapState information
  *		tbmiterator				iterator for scanning current pages
- *		mutex					mutual exclusion for state
  *		state					current state of the TIDBitmap
  *		cv						conditional wait variable
  * ----------------
@@ -87,8 +86,7 @@ typedef enum
 typedef struct ParallelBitmapHeapState
 {
 	dsa_pointer tbmiterator;
-	slock_t		mutex;
-	SharedBitmapState state;
+	pg_atomic_uint32 state;
 	ConditionVariable cv;
 } ParallelBitmapHeapState;
 
@@ -228,9 +226,7 @@ BitmapHeapNext(BitmapHeapScanState *node)
 static inline void
 BitmapDoneInitializingSharedState(ParallelBitmapHeapState *pstate)
 {
-	SpinLockAcquire(&pstate->mutex);
-	pstate->state = BM_FINISHED;
-	SpinLockRelease(&pstate->mutex);
+	pg_atomic_write_membarrier_u32(&pstate->state, BM_FINISHED);
 	ConditionVariableBroadcast(&pstate->cv);
 }
 
@@ -480,11 +476,8 @@ BitmapShouldInitializeSharedState(ParallelBitmapHeapState *pstate)
 
 	while (1)
 	{
-		SpinLockAcquire(&pstate->mutex);
-		state = pstate->state;
-		if (pstate->state == BM_INITIAL)
-			pstate->state = BM_INPROGRESS;
-		SpinLockRelease(&pstate->mutex);
+		state = BM_INITIAL;
+		pg_atomic_compare_exchange_u32(&pstate->state, &state, BM_INPROGRESS);
 
 		/* Exit if bitmap is done, or if we're the leader. */
 		if (state != BM_INPROGRESS)
@@ -538,9 +531,7 @@ ExecBitmapHeapInitializeDSM(BitmapHeapScanState *node,
 
 	pstate->tbmiterator = 0;
 
-	/* Initialize the mutex */
-	SpinLockInit(&pstate->mutex);
-	pstate->state = BM_INITIAL;
+	pg_atomic_init_u32(&pstate->state, BM_INITIAL);
 
 	ConditionVariableInit(&pstate->cv);
 
@@ -565,7 +556,7 @@ ExecBitmapHeapReInitializeDSM(BitmapHeapScanState *node,
 	if (dsa == NULL)
 		return;
 
-	pstate->state = BM_INITIAL;
+	pg_atomic_write_u32(&pstate->state, BM_INITIAL);
 
 	if (DsaPointerIsValid(pstate->tbmiterator))
 		tbm_free_shared_area(dsa, pstate->tbmiterator);
-- 
2.50.1 (Apple Git-155)


--Ot5x3ffkWEuxilWO
Content-Type: text/plain; charset=us-ascii
Content-Disposition: attachment;
	filename=v1-0003-convert-FixedParallelState-last_xlog_end-to-an-at.patch



^ permalink  raw  reply  [nested|flat] 440+ messages in thread

* [PATCH v1 2/8] convert ParallelBitmapHeapState->state to an atomic
@ 2026-07-09 18:38 Nathan Bossart <nathan@postgresql.org>
  0 siblings, 0 replies; 440+ messages in thread

From: Nathan Bossart @ 2026-07-09 18:38 UTC (permalink / raw)

---
 src/backend/executor/nodeBitmapHeapscan.c | 21 ++++++---------------
 1 file changed, 6 insertions(+), 15 deletions(-)

diff --git a/src/backend/executor/nodeBitmapHeapscan.c b/src/backend/executor/nodeBitmapHeapscan.c
index 83d6478bc2b..f2bb487bf10 100644
--- a/src/backend/executor/nodeBitmapHeapscan.c
+++ b/src/backend/executor/nodeBitmapHeapscan.c
@@ -79,7 +79,6 @@ typedef enum
 /* ----------------
  *	 ParallelBitmapHeapState information
  *		tbmiterator				iterator for scanning current pages
- *		mutex					mutual exclusion for state
  *		state					current state of the TIDBitmap
  *		cv						conditional wait variable
  * ----------------
@@ -87,8 +86,7 @@ typedef enum
 typedef struct ParallelBitmapHeapState
 {
 	dsa_pointer tbmiterator;
-	slock_t		mutex;
-	SharedBitmapState state;
+	pg_atomic_uint32 state;
 	ConditionVariable cv;
 } ParallelBitmapHeapState;
 
@@ -228,9 +226,7 @@ BitmapHeapNext(BitmapHeapScanState *node)
 static inline void
 BitmapDoneInitializingSharedState(ParallelBitmapHeapState *pstate)
 {
-	SpinLockAcquire(&pstate->mutex);
-	pstate->state = BM_FINISHED;
-	SpinLockRelease(&pstate->mutex);
+	pg_atomic_write_membarrier_u32(&pstate->state, BM_FINISHED);
 	ConditionVariableBroadcast(&pstate->cv);
 }
 
@@ -480,11 +476,8 @@ BitmapShouldInitializeSharedState(ParallelBitmapHeapState *pstate)
 
 	while (1)
 	{
-		SpinLockAcquire(&pstate->mutex);
-		state = pstate->state;
-		if (pstate->state == BM_INITIAL)
-			pstate->state = BM_INPROGRESS;
-		SpinLockRelease(&pstate->mutex);
+		state = BM_INITIAL;
+		pg_atomic_compare_exchange_u32(&pstate->state, &state, BM_INPROGRESS);
 
 		/* Exit if bitmap is done, or if we're the leader. */
 		if (state != BM_INPROGRESS)
@@ -538,9 +531,7 @@ ExecBitmapHeapInitializeDSM(BitmapHeapScanState *node,
 
 	pstate->tbmiterator = 0;
 
-	/* Initialize the mutex */
-	SpinLockInit(&pstate->mutex);
-	pstate->state = BM_INITIAL;
+	pg_atomic_init_u32(&pstate->state, BM_INITIAL);
 
 	ConditionVariableInit(&pstate->cv);
 
@@ -565,7 +556,7 @@ ExecBitmapHeapReInitializeDSM(BitmapHeapScanState *node,
 	if (dsa == NULL)
 		return;
 
-	pstate->state = BM_INITIAL;
+	pg_atomic_write_u32(&pstate->state, BM_INITIAL);
 
 	if (DsaPointerIsValid(pstate->tbmiterator))
 		tbm_free_shared_area(dsa, pstate->tbmiterator);
-- 
2.50.1 (Apple Git-155)


--Ot5x3ffkWEuxilWO
Content-Type: text/plain; charset=us-ascii
Content-Disposition: attachment;
	filename=v1-0003-convert-FixedParallelState-last_xlog_end-to-an-at.patch



^ permalink  raw  reply  [nested|flat] 440+ messages in thread

* [PATCH v2 2/9] convert ParallelBitmapHeapState->state to an atomic
@ 2026-07-09 18:38 Nathan Bossart <nathan@postgresql.org>
  0 siblings, 0 replies; 440+ messages in thread

From: Nathan Bossart @ 2026-07-09 18:38 UTC (permalink / raw)

---
 src/backend/executor/nodeBitmapHeapscan.c | 23 +++++++----------------
 1 file changed, 7 insertions(+), 16 deletions(-)

diff --git a/src/backend/executor/nodeBitmapHeapscan.c b/src/backend/executor/nodeBitmapHeapscan.c
index 83d6478bc2b..a9e83f30687 100644
--- a/src/backend/executor/nodeBitmapHeapscan.c
+++ b/src/backend/executor/nodeBitmapHeapscan.c
@@ -79,7 +79,6 @@ typedef enum
 /* ----------------
  *	 ParallelBitmapHeapState information
  *		tbmiterator				iterator for scanning current pages
- *		mutex					mutual exclusion for state
  *		state					current state of the TIDBitmap
  *		cv						conditional wait variable
  * ----------------
@@ -87,8 +86,7 @@ typedef enum
 typedef struct ParallelBitmapHeapState
 {
 	dsa_pointer tbmiterator;
-	slock_t		mutex;
-	SharedBitmapState state;
+	pg_atomic_uint32 state;
 	ConditionVariable cv;
 } ParallelBitmapHeapState;
 
@@ -228,9 +226,7 @@ BitmapHeapNext(BitmapHeapScanState *node)
 static inline void
 BitmapDoneInitializingSharedState(ParallelBitmapHeapState *pstate)
 {
-	SpinLockAcquire(&pstate->mutex);
-	pstate->state = BM_FINISHED;
-	SpinLockRelease(&pstate->mutex);
+	pg_atomic_write_membarrier_u32(&pstate->state, BM_FINISHED);
 	ConditionVariableBroadcast(&pstate->cv);
 }
 
@@ -476,15 +472,12 @@ ExecInitBitmapHeapScan(BitmapHeapScan *node, EState *estate, int eflags)
 static bool
 BitmapShouldInitializeSharedState(ParallelBitmapHeapState *pstate)
 {
-	SharedBitmapState state;
+	uint32		state;
 
 	while (1)
 	{
-		SpinLockAcquire(&pstate->mutex);
-		state = pstate->state;
-		if (pstate->state == BM_INITIAL)
-			pstate->state = BM_INPROGRESS;
-		SpinLockRelease(&pstate->mutex);
+		state = BM_INITIAL;
+		pg_atomic_compare_exchange_u32(&pstate->state, &state, BM_INPROGRESS);
 
 		/* Exit if bitmap is done, or if we're the leader. */
 		if (state != BM_INPROGRESS)
@@ -538,9 +531,7 @@ ExecBitmapHeapInitializeDSM(BitmapHeapScanState *node,
 
 	pstate->tbmiterator = 0;
 
-	/* Initialize the mutex */
-	SpinLockInit(&pstate->mutex);
-	pstate->state = BM_INITIAL;
+	pg_atomic_init_u32(&pstate->state, BM_INITIAL);
 
 	ConditionVariableInit(&pstate->cv);
 
@@ -565,7 +556,7 @@ ExecBitmapHeapReInitializeDSM(BitmapHeapScanState *node,
 	if (dsa == NULL)
 		return;
 
-	pstate->state = BM_INITIAL;
+	pg_atomic_write_u32(&pstate->state, BM_INITIAL);
 
 	if (DsaPointerIsValid(pstate->tbmiterator))
 		tbm_free_shared_area(dsa, pstate->tbmiterator);
-- 
2.50.1 (Apple Git-155)


--Xf36GNcW+0xZNily
Content-Type: text/plain; charset=us-ascii
Content-Disposition: attachment;
	filename=v2-0003-convert-FixedParallelState-last_xlog_end-to-an-at.patch



^ permalink  raw  reply  [nested|flat] 440+ messages in thread

* [PATCH v2 2/9] convert ParallelBitmapHeapState->state to an atomic
@ 2026-07-09 18:38 Nathan Bossart <nathan@postgresql.org>
  0 siblings, 0 replies; 440+ messages in thread

From: Nathan Bossart @ 2026-07-09 18:38 UTC (permalink / raw)

---
 src/backend/executor/nodeBitmapHeapscan.c | 23 +++++++----------------
 1 file changed, 7 insertions(+), 16 deletions(-)

diff --git a/src/backend/executor/nodeBitmapHeapscan.c b/src/backend/executor/nodeBitmapHeapscan.c
index 83d6478bc2b..a9e83f30687 100644
--- a/src/backend/executor/nodeBitmapHeapscan.c
+++ b/src/backend/executor/nodeBitmapHeapscan.c
@@ -79,7 +79,6 @@ typedef enum
 /* ----------------
  *	 ParallelBitmapHeapState information
  *		tbmiterator				iterator for scanning current pages
- *		mutex					mutual exclusion for state
  *		state					current state of the TIDBitmap
  *		cv						conditional wait variable
  * ----------------
@@ -87,8 +86,7 @@ typedef enum
 typedef struct ParallelBitmapHeapState
 {
 	dsa_pointer tbmiterator;
-	slock_t		mutex;
-	SharedBitmapState state;
+	pg_atomic_uint32 state;
 	ConditionVariable cv;
 } ParallelBitmapHeapState;
 
@@ -228,9 +226,7 @@ BitmapHeapNext(BitmapHeapScanState *node)
 static inline void
 BitmapDoneInitializingSharedState(ParallelBitmapHeapState *pstate)
 {
-	SpinLockAcquire(&pstate->mutex);
-	pstate->state = BM_FINISHED;
-	SpinLockRelease(&pstate->mutex);
+	pg_atomic_write_membarrier_u32(&pstate->state, BM_FINISHED);
 	ConditionVariableBroadcast(&pstate->cv);
 }
 
@@ -476,15 +472,12 @@ ExecInitBitmapHeapScan(BitmapHeapScan *node, EState *estate, int eflags)
 static bool
 BitmapShouldInitializeSharedState(ParallelBitmapHeapState *pstate)
 {
-	SharedBitmapState state;
+	uint32		state;
 
 	while (1)
 	{
-		SpinLockAcquire(&pstate->mutex);
-		state = pstate->state;
-		if (pstate->state == BM_INITIAL)
-			pstate->state = BM_INPROGRESS;
-		SpinLockRelease(&pstate->mutex);
+		state = BM_INITIAL;
+		pg_atomic_compare_exchange_u32(&pstate->state, &state, BM_INPROGRESS);
 
 		/* Exit if bitmap is done, or if we're the leader. */
 		if (state != BM_INPROGRESS)
@@ -538,9 +531,7 @@ ExecBitmapHeapInitializeDSM(BitmapHeapScanState *node,
 
 	pstate->tbmiterator = 0;
 
-	/* Initialize the mutex */
-	SpinLockInit(&pstate->mutex);
-	pstate->state = BM_INITIAL;
+	pg_atomic_init_u32(&pstate->state, BM_INITIAL);
 
 	ConditionVariableInit(&pstate->cv);
 
@@ -565,7 +556,7 @@ ExecBitmapHeapReInitializeDSM(BitmapHeapScanState *node,
 	if (dsa == NULL)
 		return;
 
-	pstate->state = BM_INITIAL;
+	pg_atomic_write_u32(&pstate->state, BM_INITIAL);
 
 	if (DsaPointerIsValid(pstate->tbmiterator))
 		tbm_free_shared_area(dsa, pstate->tbmiterator);
-- 
2.50.1 (Apple Git-155)


--Xf36GNcW+0xZNily
Content-Type: text/plain; charset=us-ascii
Content-Disposition: attachment;
	filename=v2-0003-convert-FixedParallelState-last_xlog_end-to-an-at.patch



^ permalink  raw  reply  [nested|flat] 440+ messages in thread

* [PATCH v1 2/8] convert ParallelBitmapHeapState->state to an atomic
@ 2026-07-09 18:38 Nathan Bossart <nathan@postgresql.org>
  0 siblings, 0 replies; 440+ messages in thread

From: Nathan Bossart @ 2026-07-09 18:38 UTC (permalink / raw)

---
 src/backend/executor/nodeBitmapHeapscan.c | 21 ++++++---------------
 1 file changed, 6 insertions(+), 15 deletions(-)

diff --git a/src/backend/executor/nodeBitmapHeapscan.c b/src/backend/executor/nodeBitmapHeapscan.c
index 83d6478bc2b..f2bb487bf10 100644
--- a/src/backend/executor/nodeBitmapHeapscan.c
+++ b/src/backend/executor/nodeBitmapHeapscan.c
@@ -79,7 +79,6 @@ typedef enum
 /* ----------------
  *	 ParallelBitmapHeapState information
  *		tbmiterator				iterator for scanning current pages
- *		mutex					mutual exclusion for state
  *		state					current state of the TIDBitmap
  *		cv						conditional wait variable
  * ----------------
@@ -87,8 +86,7 @@ typedef enum
 typedef struct ParallelBitmapHeapState
 {
 	dsa_pointer tbmiterator;
-	slock_t		mutex;
-	SharedBitmapState state;
+	pg_atomic_uint32 state;
 	ConditionVariable cv;
 } ParallelBitmapHeapState;
 
@@ -228,9 +226,7 @@ BitmapHeapNext(BitmapHeapScanState *node)
 static inline void
 BitmapDoneInitializingSharedState(ParallelBitmapHeapState *pstate)
 {
-	SpinLockAcquire(&pstate->mutex);
-	pstate->state = BM_FINISHED;
-	SpinLockRelease(&pstate->mutex);
+	pg_atomic_write_membarrier_u32(&pstate->state, BM_FINISHED);
 	ConditionVariableBroadcast(&pstate->cv);
 }
 
@@ -480,11 +476,8 @@ BitmapShouldInitializeSharedState(ParallelBitmapHeapState *pstate)
 
 	while (1)
 	{
-		SpinLockAcquire(&pstate->mutex);
-		state = pstate->state;
-		if (pstate->state == BM_INITIAL)
-			pstate->state = BM_INPROGRESS;
-		SpinLockRelease(&pstate->mutex);
+		state = BM_INITIAL;
+		pg_atomic_compare_exchange_u32(&pstate->state, &state, BM_INPROGRESS);
 
 		/* Exit if bitmap is done, or if we're the leader. */
 		if (state != BM_INPROGRESS)
@@ -538,9 +531,7 @@ ExecBitmapHeapInitializeDSM(BitmapHeapScanState *node,
 
 	pstate->tbmiterator = 0;
 
-	/* Initialize the mutex */
-	SpinLockInit(&pstate->mutex);
-	pstate->state = BM_INITIAL;
+	pg_atomic_init_u32(&pstate->state, BM_INITIAL);
 
 	ConditionVariableInit(&pstate->cv);
 
@@ -565,7 +556,7 @@ ExecBitmapHeapReInitializeDSM(BitmapHeapScanState *node,
 	if (dsa == NULL)
 		return;
 
-	pstate->state = BM_INITIAL;
+	pg_atomic_write_u32(&pstate->state, BM_INITIAL);
 
 	if (DsaPointerIsValid(pstate->tbmiterator))
 		tbm_free_shared_area(dsa, pstate->tbmiterator);
-- 
2.50.1 (Apple Git-155)


--Ot5x3ffkWEuxilWO
Content-Type: text/plain; charset=us-ascii
Content-Disposition: attachment;
	filename=v1-0003-convert-FixedParallelState-last_xlog_end-to-an-at.patch



^ permalink  raw  reply  [nested|flat] 440+ messages in thread

* [PATCH v1 2/8] convert ParallelBitmapHeapState->state to an atomic
@ 2026-07-09 18:38 Nathan Bossart <nathan@postgresql.org>
  0 siblings, 0 replies; 440+ messages in thread

From: Nathan Bossart @ 2026-07-09 18:38 UTC (permalink / raw)

---
 src/backend/executor/nodeBitmapHeapscan.c | 21 ++++++---------------
 1 file changed, 6 insertions(+), 15 deletions(-)

diff --git a/src/backend/executor/nodeBitmapHeapscan.c b/src/backend/executor/nodeBitmapHeapscan.c
index 83d6478bc2b..f2bb487bf10 100644
--- a/src/backend/executor/nodeBitmapHeapscan.c
+++ b/src/backend/executor/nodeBitmapHeapscan.c
@@ -79,7 +79,6 @@ typedef enum
 /* ----------------
  *	 ParallelBitmapHeapState information
  *		tbmiterator				iterator for scanning current pages
- *		mutex					mutual exclusion for state
  *		state					current state of the TIDBitmap
  *		cv						conditional wait variable
  * ----------------
@@ -87,8 +86,7 @@ typedef enum
 typedef struct ParallelBitmapHeapState
 {
 	dsa_pointer tbmiterator;
-	slock_t		mutex;
-	SharedBitmapState state;
+	pg_atomic_uint32 state;
 	ConditionVariable cv;
 } ParallelBitmapHeapState;
 
@@ -228,9 +226,7 @@ BitmapHeapNext(BitmapHeapScanState *node)
 static inline void
 BitmapDoneInitializingSharedState(ParallelBitmapHeapState *pstate)
 {
-	SpinLockAcquire(&pstate->mutex);
-	pstate->state = BM_FINISHED;
-	SpinLockRelease(&pstate->mutex);
+	pg_atomic_write_membarrier_u32(&pstate->state, BM_FINISHED);
 	ConditionVariableBroadcast(&pstate->cv);
 }
 
@@ -480,11 +476,8 @@ BitmapShouldInitializeSharedState(ParallelBitmapHeapState *pstate)
 
 	while (1)
 	{
-		SpinLockAcquire(&pstate->mutex);
-		state = pstate->state;
-		if (pstate->state == BM_INITIAL)
-			pstate->state = BM_INPROGRESS;
-		SpinLockRelease(&pstate->mutex);
+		state = BM_INITIAL;
+		pg_atomic_compare_exchange_u32(&pstate->state, &state, BM_INPROGRESS);
 
 		/* Exit if bitmap is done, or if we're the leader. */
 		if (state != BM_INPROGRESS)
@@ -538,9 +531,7 @@ ExecBitmapHeapInitializeDSM(BitmapHeapScanState *node,
 
 	pstate->tbmiterator = 0;
 
-	/* Initialize the mutex */
-	SpinLockInit(&pstate->mutex);
-	pstate->state = BM_INITIAL;
+	pg_atomic_init_u32(&pstate->state, BM_INITIAL);
 
 	ConditionVariableInit(&pstate->cv);
 
@@ -565,7 +556,7 @@ ExecBitmapHeapReInitializeDSM(BitmapHeapScanState *node,
 	if (dsa == NULL)
 		return;
 
-	pstate->state = BM_INITIAL;
+	pg_atomic_write_u32(&pstate->state, BM_INITIAL);
 
 	if (DsaPointerIsValid(pstate->tbmiterator))
 		tbm_free_shared_area(dsa, pstate->tbmiterator);
-- 
2.50.1 (Apple Git-155)


--Ot5x3ffkWEuxilWO
Content-Type: text/plain; charset=us-ascii
Content-Disposition: attachment;
	filename=v1-0003-convert-FixedParallelState-last_xlog_end-to-an-at.patch



^ permalink  raw  reply  [nested|flat] 440+ messages in thread

* [PATCH v1 2/8] convert ParallelBitmapHeapState->state to an atomic
@ 2026-07-09 18:38 Nathan Bossart <nathan@postgresql.org>
  0 siblings, 0 replies; 440+ messages in thread

From: Nathan Bossart @ 2026-07-09 18:38 UTC (permalink / raw)

---
 src/backend/executor/nodeBitmapHeapscan.c | 21 ++++++---------------
 1 file changed, 6 insertions(+), 15 deletions(-)

diff --git a/src/backend/executor/nodeBitmapHeapscan.c b/src/backend/executor/nodeBitmapHeapscan.c
index 83d6478bc2b..f2bb487bf10 100644
--- a/src/backend/executor/nodeBitmapHeapscan.c
+++ b/src/backend/executor/nodeBitmapHeapscan.c
@@ -79,7 +79,6 @@ typedef enum
 /* ----------------
  *	 ParallelBitmapHeapState information
  *		tbmiterator				iterator for scanning current pages
- *		mutex					mutual exclusion for state
  *		state					current state of the TIDBitmap
  *		cv						conditional wait variable
  * ----------------
@@ -87,8 +86,7 @@ typedef enum
 typedef struct ParallelBitmapHeapState
 {
 	dsa_pointer tbmiterator;
-	slock_t		mutex;
-	SharedBitmapState state;
+	pg_atomic_uint32 state;
 	ConditionVariable cv;
 } ParallelBitmapHeapState;
 
@@ -228,9 +226,7 @@ BitmapHeapNext(BitmapHeapScanState *node)
 static inline void
 BitmapDoneInitializingSharedState(ParallelBitmapHeapState *pstate)
 {
-	SpinLockAcquire(&pstate->mutex);
-	pstate->state = BM_FINISHED;
-	SpinLockRelease(&pstate->mutex);
+	pg_atomic_write_membarrier_u32(&pstate->state, BM_FINISHED);
 	ConditionVariableBroadcast(&pstate->cv);
 }
 
@@ -480,11 +476,8 @@ BitmapShouldInitializeSharedState(ParallelBitmapHeapState *pstate)
 
 	while (1)
 	{
-		SpinLockAcquire(&pstate->mutex);
-		state = pstate->state;
-		if (pstate->state == BM_INITIAL)
-			pstate->state = BM_INPROGRESS;
-		SpinLockRelease(&pstate->mutex);
+		state = BM_INITIAL;
+		pg_atomic_compare_exchange_u32(&pstate->state, &state, BM_INPROGRESS);
 
 		/* Exit if bitmap is done, or if we're the leader. */
 		if (state != BM_INPROGRESS)
@@ -538,9 +531,7 @@ ExecBitmapHeapInitializeDSM(BitmapHeapScanState *node,
 
 	pstate->tbmiterator = 0;
 
-	/* Initialize the mutex */
-	SpinLockInit(&pstate->mutex);
-	pstate->state = BM_INITIAL;
+	pg_atomic_init_u32(&pstate->state, BM_INITIAL);
 
 	ConditionVariableInit(&pstate->cv);
 
@@ -565,7 +556,7 @@ ExecBitmapHeapReInitializeDSM(BitmapHeapScanState *node,
 	if (dsa == NULL)
 		return;
 
-	pstate->state = BM_INITIAL;
+	pg_atomic_write_u32(&pstate->state, BM_INITIAL);
 
 	if (DsaPointerIsValid(pstate->tbmiterator))
 		tbm_free_shared_area(dsa, pstate->tbmiterator);
-- 
2.50.1 (Apple Git-155)


--Ot5x3ffkWEuxilWO
Content-Type: text/plain; charset=us-ascii
Content-Disposition: attachment;
	filename=v1-0003-convert-FixedParallelState-last_xlog_end-to-an-at.patch



^ permalink  raw  reply  [nested|flat] 440+ messages in thread

* [PATCH v1 2/8] convert ParallelBitmapHeapState->state to an atomic
@ 2026-07-09 18:38 Nathan Bossart <nathan@postgresql.org>
  0 siblings, 0 replies; 440+ messages in thread

From: Nathan Bossart @ 2026-07-09 18:38 UTC (permalink / raw)

---
 src/backend/executor/nodeBitmapHeapscan.c | 21 ++++++---------------
 1 file changed, 6 insertions(+), 15 deletions(-)

diff --git a/src/backend/executor/nodeBitmapHeapscan.c b/src/backend/executor/nodeBitmapHeapscan.c
index 83d6478bc2b..f2bb487bf10 100644
--- a/src/backend/executor/nodeBitmapHeapscan.c
+++ b/src/backend/executor/nodeBitmapHeapscan.c
@@ -79,7 +79,6 @@ typedef enum
 /* ----------------
  *	 ParallelBitmapHeapState information
  *		tbmiterator				iterator for scanning current pages
- *		mutex					mutual exclusion for state
  *		state					current state of the TIDBitmap
  *		cv						conditional wait variable
  * ----------------
@@ -87,8 +86,7 @@ typedef enum
 typedef struct ParallelBitmapHeapState
 {
 	dsa_pointer tbmiterator;
-	slock_t		mutex;
-	SharedBitmapState state;
+	pg_atomic_uint32 state;
 	ConditionVariable cv;
 } ParallelBitmapHeapState;
 
@@ -228,9 +226,7 @@ BitmapHeapNext(BitmapHeapScanState *node)
 static inline void
 BitmapDoneInitializingSharedState(ParallelBitmapHeapState *pstate)
 {
-	SpinLockAcquire(&pstate->mutex);
-	pstate->state = BM_FINISHED;
-	SpinLockRelease(&pstate->mutex);
+	pg_atomic_write_membarrier_u32(&pstate->state, BM_FINISHED);
 	ConditionVariableBroadcast(&pstate->cv);
 }
 
@@ -480,11 +476,8 @@ BitmapShouldInitializeSharedState(ParallelBitmapHeapState *pstate)
 
 	while (1)
 	{
-		SpinLockAcquire(&pstate->mutex);
-		state = pstate->state;
-		if (pstate->state == BM_INITIAL)
-			pstate->state = BM_INPROGRESS;
-		SpinLockRelease(&pstate->mutex);
+		state = BM_INITIAL;
+		pg_atomic_compare_exchange_u32(&pstate->state, &state, BM_INPROGRESS);
 
 		/* Exit if bitmap is done, or if we're the leader. */
 		if (state != BM_INPROGRESS)
@@ -538,9 +531,7 @@ ExecBitmapHeapInitializeDSM(BitmapHeapScanState *node,
 
 	pstate->tbmiterator = 0;
 
-	/* Initialize the mutex */
-	SpinLockInit(&pstate->mutex);
-	pstate->state = BM_INITIAL;
+	pg_atomic_init_u32(&pstate->state, BM_INITIAL);
 
 	ConditionVariableInit(&pstate->cv);
 
@@ -565,7 +556,7 @@ ExecBitmapHeapReInitializeDSM(BitmapHeapScanState *node,
 	if (dsa == NULL)
 		return;
 
-	pstate->state = BM_INITIAL;
+	pg_atomic_write_u32(&pstate->state, BM_INITIAL);
 
 	if (DsaPointerIsValid(pstate->tbmiterator))
 		tbm_free_shared_area(dsa, pstate->tbmiterator);
-- 
2.50.1 (Apple Git-155)


--Ot5x3ffkWEuxilWO
Content-Type: text/plain; charset=us-ascii
Content-Disposition: attachment;
	filename=v1-0003-convert-FixedParallelState-last_xlog_end-to-an-at.patch



^ permalink  raw  reply  [nested|flat] 440+ messages in thread

* [PATCH v2 2/9] convert ParallelBitmapHeapState->state to an atomic
@ 2026-07-09 18:38 Nathan Bossart <nathan@postgresql.org>
  0 siblings, 0 replies; 440+ messages in thread

From: Nathan Bossart @ 2026-07-09 18:38 UTC (permalink / raw)

---
 src/backend/executor/nodeBitmapHeapscan.c | 23 +++++++----------------
 1 file changed, 7 insertions(+), 16 deletions(-)

diff --git a/src/backend/executor/nodeBitmapHeapscan.c b/src/backend/executor/nodeBitmapHeapscan.c
index 83d6478bc2b..a9e83f30687 100644
--- a/src/backend/executor/nodeBitmapHeapscan.c
+++ b/src/backend/executor/nodeBitmapHeapscan.c
@@ -79,7 +79,6 @@ typedef enum
 /* ----------------
  *	 ParallelBitmapHeapState information
  *		tbmiterator				iterator for scanning current pages
- *		mutex					mutual exclusion for state
  *		state					current state of the TIDBitmap
  *		cv						conditional wait variable
  * ----------------
@@ -87,8 +86,7 @@ typedef enum
 typedef struct ParallelBitmapHeapState
 {
 	dsa_pointer tbmiterator;
-	slock_t		mutex;
-	SharedBitmapState state;
+	pg_atomic_uint32 state;
 	ConditionVariable cv;
 } ParallelBitmapHeapState;
 
@@ -228,9 +226,7 @@ BitmapHeapNext(BitmapHeapScanState *node)
 static inline void
 BitmapDoneInitializingSharedState(ParallelBitmapHeapState *pstate)
 {
-	SpinLockAcquire(&pstate->mutex);
-	pstate->state = BM_FINISHED;
-	SpinLockRelease(&pstate->mutex);
+	pg_atomic_write_membarrier_u32(&pstate->state, BM_FINISHED);
 	ConditionVariableBroadcast(&pstate->cv);
 }
 
@@ -476,15 +472,12 @@ ExecInitBitmapHeapScan(BitmapHeapScan *node, EState *estate, int eflags)
 static bool
 BitmapShouldInitializeSharedState(ParallelBitmapHeapState *pstate)
 {
-	SharedBitmapState state;
+	uint32		state;
 
 	while (1)
 	{
-		SpinLockAcquire(&pstate->mutex);
-		state = pstate->state;
-		if (pstate->state == BM_INITIAL)
-			pstate->state = BM_INPROGRESS;
-		SpinLockRelease(&pstate->mutex);
+		state = BM_INITIAL;
+		pg_atomic_compare_exchange_u32(&pstate->state, &state, BM_INPROGRESS);
 
 		/* Exit if bitmap is done, or if we're the leader. */
 		if (state != BM_INPROGRESS)
@@ -538,9 +531,7 @@ ExecBitmapHeapInitializeDSM(BitmapHeapScanState *node,
 
 	pstate->tbmiterator = 0;
 
-	/* Initialize the mutex */
-	SpinLockInit(&pstate->mutex);
-	pstate->state = BM_INITIAL;
+	pg_atomic_init_u32(&pstate->state, BM_INITIAL);
 
 	ConditionVariableInit(&pstate->cv);
 
@@ -565,7 +556,7 @@ ExecBitmapHeapReInitializeDSM(BitmapHeapScanState *node,
 	if (dsa == NULL)
 		return;
 
-	pstate->state = BM_INITIAL;
+	pg_atomic_write_u32(&pstate->state, BM_INITIAL);
 
 	if (DsaPointerIsValid(pstate->tbmiterator))
 		tbm_free_shared_area(dsa, pstate->tbmiterator);
-- 
2.50.1 (Apple Git-155)


--Xf36GNcW+0xZNily
Content-Type: text/plain; charset=us-ascii
Content-Disposition: attachment;
	filename=v2-0003-convert-FixedParallelState-last_xlog_end-to-an-at.patch



^ permalink  raw  reply  [nested|flat] 440+ messages in thread

* [PATCH v2 2/9] convert ParallelBitmapHeapState->state to an atomic
@ 2026-07-09 18:38 Nathan Bossart <nathan@postgresql.org>
  0 siblings, 0 replies; 440+ messages in thread

From: Nathan Bossart @ 2026-07-09 18:38 UTC (permalink / raw)

---
 src/backend/executor/nodeBitmapHeapscan.c | 23 +++++++----------------
 1 file changed, 7 insertions(+), 16 deletions(-)

diff --git a/src/backend/executor/nodeBitmapHeapscan.c b/src/backend/executor/nodeBitmapHeapscan.c
index 83d6478bc2b..a9e83f30687 100644
--- a/src/backend/executor/nodeBitmapHeapscan.c
+++ b/src/backend/executor/nodeBitmapHeapscan.c
@@ -79,7 +79,6 @@ typedef enum
 /* ----------------
  *	 ParallelBitmapHeapState information
  *		tbmiterator				iterator for scanning current pages
- *		mutex					mutual exclusion for state
  *		state					current state of the TIDBitmap
  *		cv						conditional wait variable
  * ----------------
@@ -87,8 +86,7 @@ typedef enum
 typedef struct ParallelBitmapHeapState
 {
 	dsa_pointer tbmiterator;
-	slock_t		mutex;
-	SharedBitmapState state;
+	pg_atomic_uint32 state;
 	ConditionVariable cv;
 } ParallelBitmapHeapState;
 
@@ -228,9 +226,7 @@ BitmapHeapNext(BitmapHeapScanState *node)
 static inline void
 BitmapDoneInitializingSharedState(ParallelBitmapHeapState *pstate)
 {
-	SpinLockAcquire(&pstate->mutex);
-	pstate->state = BM_FINISHED;
-	SpinLockRelease(&pstate->mutex);
+	pg_atomic_write_membarrier_u32(&pstate->state, BM_FINISHED);
 	ConditionVariableBroadcast(&pstate->cv);
 }
 
@@ -476,15 +472,12 @@ ExecInitBitmapHeapScan(BitmapHeapScan *node, EState *estate, int eflags)
 static bool
 BitmapShouldInitializeSharedState(ParallelBitmapHeapState *pstate)
 {
-	SharedBitmapState state;
+	uint32		state;
 
 	while (1)
 	{
-		SpinLockAcquire(&pstate->mutex);
-		state = pstate->state;
-		if (pstate->state == BM_INITIAL)
-			pstate->state = BM_INPROGRESS;
-		SpinLockRelease(&pstate->mutex);
+		state = BM_INITIAL;
+		pg_atomic_compare_exchange_u32(&pstate->state, &state, BM_INPROGRESS);
 
 		/* Exit if bitmap is done, or if we're the leader. */
 		if (state != BM_INPROGRESS)
@@ -538,9 +531,7 @@ ExecBitmapHeapInitializeDSM(BitmapHeapScanState *node,
 
 	pstate->tbmiterator = 0;
 
-	/* Initialize the mutex */
-	SpinLockInit(&pstate->mutex);
-	pstate->state = BM_INITIAL;
+	pg_atomic_init_u32(&pstate->state, BM_INITIAL);
 
 	ConditionVariableInit(&pstate->cv);
 
@@ -565,7 +556,7 @@ ExecBitmapHeapReInitializeDSM(BitmapHeapScanState *node,
 	if (dsa == NULL)
 		return;
 
-	pstate->state = BM_INITIAL;
+	pg_atomic_write_u32(&pstate->state, BM_INITIAL);
 
 	if (DsaPointerIsValid(pstate->tbmiterator))
 		tbm_free_shared_area(dsa, pstate->tbmiterator);
-- 
2.50.1 (Apple Git-155)


--Xf36GNcW+0xZNily
Content-Type: text/plain; charset=us-ascii
Content-Disposition: attachment;
	filename=v2-0003-convert-FixedParallelState-last_xlog_end-to-an-at.patch



^ permalink  raw  reply  [nested|flat] 440+ messages in thread

* [PATCH v1 2/8] convert ParallelBitmapHeapState->state to an atomic
@ 2026-07-09 18:38 Nathan Bossart <nathan@postgresql.org>
  0 siblings, 0 replies; 440+ messages in thread

From: Nathan Bossart @ 2026-07-09 18:38 UTC (permalink / raw)

---
 src/backend/executor/nodeBitmapHeapscan.c | 21 ++++++---------------
 1 file changed, 6 insertions(+), 15 deletions(-)

diff --git a/src/backend/executor/nodeBitmapHeapscan.c b/src/backend/executor/nodeBitmapHeapscan.c
index 83d6478bc2b..f2bb487bf10 100644
--- a/src/backend/executor/nodeBitmapHeapscan.c
+++ b/src/backend/executor/nodeBitmapHeapscan.c
@@ -79,7 +79,6 @@ typedef enum
 /* ----------------
  *	 ParallelBitmapHeapState information
  *		tbmiterator				iterator for scanning current pages
- *		mutex					mutual exclusion for state
  *		state					current state of the TIDBitmap
  *		cv						conditional wait variable
  * ----------------
@@ -87,8 +86,7 @@ typedef enum
 typedef struct ParallelBitmapHeapState
 {
 	dsa_pointer tbmiterator;
-	slock_t		mutex;
-	SharedBitmapState state;
+	pg_atomic_uint32 state;
 	ConditionVariable cv;
 } ParallelBitmapHeapState;
 
@@ -228,9 +226,7 @@ BitmapHeapNext(BitmapHeapScanState *node)
 static inline void
 BitmapDoneInitializingSharedState(ParallelBitmapHeapState *pstate)
 {
-	SpinLockAcquire(&pstate->mutex);
-	pstate->state = BM_FINISHED;
-	SpinLockRelease(&pstate->mutex);
+	pg_atomic_write_membarrier_u32(&pstate->state, BM_FINISHED);
 	ConditionVariableBroadcast(&pstate->cv);
 }
 
@@ -480,11 +476,8 @@ BitmapShouldInitializeSharedState(ParallelBitmapHeapState *pstate)
 
 	while (1)
 	{
-		SpinLockAcquire(&pstate->mutex);
-		state = pstate->state;
-		if (pstate->state == BM_INITIAL)
-			pstate->state = BM_INPROGRESS;
-		SpinLockRelease(&pstate->mutex);
+		state = BM_INITIAL;
+		pg_atomic_compare_exchange_u32(&pstate->state, &state, BM_INPROGRESS);
 
 		/* Exit if bitmap is done, or if we're the leader. */
 		if (state != BM_INPROGRESS)
@@ -538,9 +531,7 @@ ExecBitmapHeapInitializeDSM(BitmapHeapScanState *node,
 
 	pstate->tbmiterator = 0;
 
-	/* Initialize the mutex */
-	SpinLockInit(&pstate->mutex);
-	pstate->state = BM_INITIAL;
+	pg_atomic_init_u32(&pstate->state, BM_INITIAL);
 
 	ConditionVariableInit(&pstate->cv);
 
@@ -565,7 +556,7 @@ ExecBitmapHeapReInitializeDSM(BitmapHeapScanState *node,
 	if (dsa == NULL)
 		return;
 
-	pstate->state = BM_INITIAL;
+	pg_atomic_write_u32(&pstate->state, BM_INITIAL);
 
 	if (DsaPointerIsValid(pstate->tbmiterator))
 		tbm_free_shared_area(dsa, pstate->tbmiterator);
-- 
2.50.1 (Apple Git-155)


--Ot5x3ffkWEuxilWO
Content-Type: text/plain; charset=us-ascii
Content-Disposition: attachment;
	filename=v1-0003-convert-FixedParallelState-last_xlog_end-to-an-at.patch



^ permalink  raw  reply  [nested|flat] 440+ messages in thread

* [PATCH v1 2/8] convert ParallelBitmapHeapState->state to an atomic
@ 2026-07-09 18:38 Nathan Bossart <nathan@postgresql.org>
  0 siblings, 0 replies; 440+ messages in thread

From: Nathan Bossart @ 2026-07-09 18:38 UTC (permalink / raw)

---
 src/backend/executor/nodeBitmapHeapscan.c | 21 ++++++---------------
 1 file changed, 6 insertions(+), 15 deletions(-)

diff --git a/src/backend/executor/nodeBitmapHeapscan.c b/src/backend/executor/nodeBitmapHeapscan.c
index 83d6478bc2b..f2bb487bf10 100644
--- a/src/backend/executor/nodeBitmapHeapscan.c
+++ b/src/backend/executor/nodeBitmapHeapscan.c
@@ -79,7 +79,6 @@ typedef enum
 /* ----------------
  *	 ParallelBitmapHeapState information
  *		tbmiterator				iterator for scanning current pages
- *		mutex					mutual exclusion for state
  *		state					current state of the TIDBitmap
  *		cv						conditional wait variable
  * ----------------
@@ -87,8 +86,7 @@ typedef enum
 typedef struct ParallelBitmapHeapState
 {
 	dsa_pointer tbmiterator;
-	slock_t		mutex;
-	SharedBitmapState state;
+	pg_atomic_uint32 state;
 	ConditionVariable cv;
 } ParallelBitmapHeapState;
 
@@ -228,9 +226,7 @@ BitmapHeapNext(BitmapHeapScanState *node)
 static inline void
 BitmapDoneInitializingSharedState(ParallelBitmapHeapState *pstate)
 {
-	SpinLockAcquire(&pstate->mutex);
-	pstate->state = BM_FINISHED;
-	SpinLockRelease(&pstate->mutex);
+	pg_atomic_write_membarrier_u32(&pstate->state, BM_FINISHED);
 	ConditionVariableBroadcast(&pstate->cv);
 }
 
@@ -480,11 +476,8 @@ BitmapShouldInitializeSharedState(ParallelBitmapHeapState *pstate)
 
 	while (1)
 	{
-		SpinLockAcquire(&pstate->mutex);
-		state = pstate->state;
-		if (pstate->state == BM_INITIAL)
-			pstate->state = BM_INPROGRESS;
-		SpinLockRelease(&pstate->mutex);
+		state = BM_INITIAL;
+		pg_atomic_compare_exchange_u32(&pstate->state, &state, BM_INPROGRESS);
 
 		/* Exit if bitmap is done, or if we're the leader. */
 		if (state != BM_INPROGRESS)
@@ -538,9 +531,7 @@ ExecBitmapHeapInitializeDSM(BitmapHeapScanState *node,
 
 	pstate->tbmiterator = 0;
 
-	/* Initialize the mutex */
-	SpinLockInit(&pstate->mutex);
-	pstate->state = BM_INITIAL;
+	pg_atomic_init_u32(&pstate->state, BM_INITIAL);
 
 	ConditionVariableInit(&pstate->cv);
 
@@ -565,7 +556,7 @@ ExecBitmapHeapReInitializeDSM(BitmapHeapScanState *node,
 	if (dsa == NULL)
 		return;
 
-	pstate->state = BM_INITIAL;
+	pg_atomic_write_u32(&pstate->state, BM_INITIAL);
 
 	if (DsaPointerIsValid(pstate->tbmiterator))
 		tbm_free_shared_area(dsa, pstate->tbmiterator);
-- 
2.50.1 (Apple Git-155)


--Ot5x3ffkWEuxilWO
Content-Type: text/plain; charset=us-ascii
Content-Disposition: attachment;
	filename=v1-0003-convert-FixedParallelState-last_xlog_end-to-an-at.patch



^ permalink  raw  reply  [nested|flat] 440+ messages in thread

* [PATCH v1 2/8] convert ParallelBitmapHeapState->state to an atomic
@ 2026-07-09 18:38 Nathan Bossart <nathan@postgresql.org>
  0 siblings, 0 replies; 440+ messages in thread

From: Nathan Bossart @ 2026-07-09 18:38 UTC (permalink / raw)

---
 src/backend/executor/nodeBitmapHeapscan.c | 21 ++++++---------------
 1 file changed, 6 insertions(+), 15 deletions(-)

diff --git a/src/backend/executor/nodeBitmapHeapscan.c b/src/backend/executor/nodeBitmapHeapscan.c
index 83d6478bc2b..f2bb487bf10 100644
--- a/src/backend/executor/nodeBitmapHeapscan.c
+++ b/src/backend/executor/nodeBitmapHeapscan.c
@@ -79,7 +79,6 @@ typedef enum
 /* ----------------
  *	 ParallelBitmapHeapState information
  *		tbmiterator				iterator for scanning current pages
- *		mutex					mutual exclusion for state
  *		state					current state of the TIDBitmap
  *		cv						conditional wait variable
  * ----------------
@@ -87,8 +86,7 @@ typedef enum
 typedef struct ParallelBitmapHeapState
 {
 	dsa_pointer tbmiterator;
-	slock_t		mutex;
-	SharedBitmapState state;
+	pg_atomic_uint32 state;
 	ConditionVariable cv;
 } ParallelBitmapHeapState;
 
@@ -228,9 +226,7 @@ BitmapHeapNext(BitmapHeapScanState *node)
 static inline void
 BitmapDoneInitializingSharedState(ParallelBitmapHeapState *pstate)
 {
-	SpinLockAcquire(&pstate->mutex);
-	pstate->state = BM_FINISHED;
-	SpinLockRelease(&pstate->mutex);
+	pg_atomic_write_membarrier_u32(&pstate->state, BM_FINISHED);
 	ConditionVariableBroadcast(&pstate->cv);
 }
 
@@ -480,11 +476,8 @@ BitmapShouldInitializeSharedState(ParallelBitmapHeapState *pstate)
 
 	while (1)
 	{
-		SpinLockAcquire(&pstate->mutex);
-		state = pstate->state;
-		if (pstate->state == BM_INITIAL)
-			pstate->state = BM_INPROGRESS;
-		SpinLockRelease(&pstate->mutex);
+		state = BM_INITIAL;
+		pg_atomic_compare_exchange_u32(&pstate->state, &state, BM_INPROGRESS);
 
 		/* Exit if bitmap is done, or if we're the leader. */
 		if (state != BM_INPROGRESS)
@@ -538,9 +531,7 @@ ExecBitmapHeapInitializeDSM(BitmapHeapScanState *node,
 
 	pstate->tbmiterator = 0;
 
-	/* Initialize the mutex */
-	SpinLockInit(&pstate->mutex);
-	pstate->state = BM_INITIAL;
+	pg_atomic_init_u32(&pstate->state, BM_INITIAL);
 
 	ConditionVariableInit(&pstate->cv);
 
@@ -565,7 +556,7 @@ ExecBitmapHeapReInitializeDSM(BitmapHeapScanState *node,
 	if (dsa == NULL)
 		return;
 
-	pstate->state = BM_INITIAL;
+	pg_atomic_write_u32(&pstate->state, BM_INITIAL);
 
 	if (DsaPointerIsValid(pstate->tbmiterator))
 		tbm_free_shared_area(dsa, pstate->tbmiterator);
-- 
2.50.1 (Apple Git-155)


--Ot5x3ffkWEuxilWO
Content-Type: text/plain; charset=us-ascii
Content-Disposition: attachment;
	filename=v1-0003-convert-FixedParallelState-last_xlog_end-to-an-at.patch



^ permalink  raw  reply  [nested|flat] 440+ messages in thread

* [PATCH v1 2/8] convert ParallelBitmapHeapState->state to an atomic
@ 2026-07-09 18:38 Nathan Bossart <nathan@postgresql.org>
  0 siblings, 0 replies; 440+ messages in thread

From: Nathan Bossart @ 2026-07-09 18:38 UTC (permalink / raw)

---
 src/backend/executor/nodeBitmapHeapscan.c | 21 ++++++---------------
 1 file changed, 6 insertions(+), 15 deletions(-)

diff --git a/src/backend/executor/nodeBitmapHeapscan.c b/src/backend/executor/nodeBitmapHeapscan.c
index 83d6478bc2b..f2bb487bf10 100644
--- a/src/backend/executor/nodeBitmapHeapscan.c
+++ b/src/backend/executor/nodeBitmapHeapscan.c
@@ -79,7 +79,6 @@ typedef enum
 /* ----------------
  *	 ParallelBitmapHeapState information
  *		tbmiterator				iterator for scanning current pages
- *		mutex					mutual exclusion for state
  *		state					current state of the TIDBitmap
  *		cv						conditional wait variable
  * ----------------
@@ -87,8 +86,7 @@ typedef enum
 typedef struct ParallelBitmapHeapState
 {
 	dsa_pointer tbmiterator;
-	slock_t		mutex;
-	SharedBitmapState state;
+	pg_atomic_uint32 state;
 	ConditionVariable cv;
 } ParallelBitmapHeapState;
 
@@ -228,9 +226,7 @@ BitmapHeapNext(BitmapHeapScanState *node)
 static inline void
 BitmapDoneInitializingSharedState(ParallelBitmapHeapState *pstate)
 {
-	SpinLockAcquire(&pstate->mutex);
-	pstate->state = BM_FINISHED;
-	SpinLockRelease(&pstate->mutex);
+	pg_atomic_write_membarrier_u32(&pstate->state, BM_FINISHED);
 	ConditionVariableBroadcast(&pstate->cv);
 }
 
@@ -480,11 +476,8 @@ BitmapShouldInitializeSharedState(ParallelBitmapHeapState *pstate)
 
 	while (1)
 	{
-		SpinLockAcquire(&pstate->mutex);
-		state = pstate->state;
-		if (pstate->state == BM_INITIAL)
-			pstate->state = BM_INPROGRESS;
-		SpinLockRelease(&pstate->mutex);
+		state = BM_INITIAL;
+		pg_atomic_compare_exchange_u32(&pstate->state, &state, BM_INPROGRESS);
 
 		/* Exit if bitmap is done, or if we're the leader. */
 		if (state != BM_INPROGRESS)
@@ -538,9 +531,7 @@ ExecBitmapHeapInitializeDSM(BitmapHeapScanState *node,
 
 	pstate->tbmiterator = 0;
 
-	/* Initialize the mutex */
-	SpinLockInit(&pstate->mutex);
-	pstate->state = BM_INITIAL;
+	pg_atomic_init_u32(&pstate->state, BM_INITIAL);
 
 	ConditionVariableInit(&pstate->cv);
 
@@ -565,7 +556,7 @@ ExecBitmapHeapReInitializeDSM(BitmapHeapScanState *node,
 	if (dsa == NULL)
 		return;
 
-	pstate->state = BM_INITIAL;
+	pg_atomic_write_u32(&pstate->state, BM_INITIAL);
 
 	if (DsaPointerIsValid(pstate->tbmiterator))
 		tbm_free_shared_area(dsa, pstate->tbmiterator);
-- 
2.50.1 (Apple Git-155)


--Ot5x3ffkWEuxilWO
Content-Type: text/plain; charset=us-ascii
Content-Disposition: attachment;
	filename=v1-0003-convert-FixedParallelState-last_xlog_end-to-an-at.patch



^ permalink  raw  reply  [nested|flat] 440+ messages in thread

* [PATCH v1 2/8] convert ParallelBitmapHeapState->state to an atomic
@ 2026-07-09 18:38 Nathan Bossart <nathan@postgresql.org>
  0 siblings, 0 replies; 440+ messages in thread

From: Nathan Bossart @ 2026-07-09 18:38 UTC (permalink / raw)

---
 src/backend/executor/nodeBitmapHeapscan.c | 21 ++++++---------------
 1 file changed, 6 insertions(+), 15 deletions(-)

diff --git a/src/backend/executor/nodeBitmapHeapscan.c b/src/backend/executor/nodeBitmapHeapscan.c
index 83d6478bc2b..f2bb487bf10 100644
--- a/src/backend/executor/nodeBitmapHeapscan.c
+++ b/src/backend/executor/nodeBitmapHeapscan.c
@@ -79,7 +79,6 @@ typedef enum
 /* ----------------
  *	 ParallelBitmapHeapState information
  *		tbmiterator				iterator for scanning current pages
- *		mutex					mutual exclusion for state
  *		state					current state of the TIDBitmap
  *		cv						conditional wait variable
  * ----------------
@@ -87,8 +86,7 @@ typedef enum
 typedef struct ParallelBitmapHeapState
 {
 	dsa_pointer tbmiterator;
-	slock_t		mutex;
-	SharedBitmapState state;
+	pg_atomic_uint32 state;
 	ConditionVariable cv;
 } ParallelBitmapHeapState;
 
@@ -228,9 +226,7 @@ BitmapHeapNext(BitmapHeapScanState *node)
 static inline void
 BitmapDoneInitializingSharedState(ParallelBitmapHeapState *pstate)
 {
-	SpinLockAcquire(&pstate->mutex);
-	pstate->state = BM_FINISHED;
-	SpinLockRelease(&pstate->mutex);
+	pg_atomic_write_membarrier_u32(&pstate->state, BM_FINISHED);
 	ConditionVariableBroadcast(&pstate->cv);
 }
 
@@ -480,11 +476,8 @@ BitmapShouldInitializeSharedState(ParallelBitmapHeapState *pstate)
 
 	while (1)
 	{
-		SpinLockAcquire(&pstate->mutex);
-		state = pstate->state;
-		if (pstate->state == BM_INITIAL)
-			pstate->state = BM_INPROGRESS;
-		SpinLockRelease(&pstate->mutex);
+		state = BM_INITIAL;
+		pg_atomic_compare_exchange_u32(&pstate->state, &state, BM_INPROGRESS);
 
 		/* Exit if bitmap is done, or if we're the leader. */
 		if (state != BM_INPROGRESS)
@@ -538,9 +531,7 @@ ExecBitmapHeapInitializeDSM(BitmapHeapScanState *node,
 
 	pstate->tbmiterator = 0;
 
-	/* Initialize the mutex */
-	SpinLockInit(&pstate->mutex);
-	pstate->state = BM_INITIAL;
+	pg_atomic_init_u32(&pstate->state, BM_INITIAL);
 
 	ConditionVariableInit(&pstate->cv);
 
@@ -565,7 +556,7 @@ ExecBitmapHeapReInitializeDSM(BitmapHeapScanState *node,
 	if (dsa == NULL)
 		return;
 
-	pstate->state = BM_INITIAL;
+	pg_atomic_write_u32(&pstate->state, BM_INITIAL);
 
 	if (DsaPointerIsValid(pstate->tbmiterator))
 		tbm_free_shared_area(dsa, pstate->tbmiterator);
-- 
2.50.1 (Apple Git-155)


--Ot5x3ffkWEuxilWO
Content-Type: text/plain; charset=us-ascii
Content-Disposition: attachment;
	filename=v1-0003-convert-FixedParallelState-last_xlog_end-to-an-at.patch



^ permalink  raw  reply  [nested|flat] 440+ messages in thread

* [PATCH v2 2/9] convert ParallelBitmapHeapState->state to an atomic
@ 2026-07-09 18:38 Nathan Bossart <nathan@postgresql.org>
  0 siblings, 0 replies; 440+ messages in thread

From: Nathan Bossart @ 2026-07-09 18:38 UTC (permalink / raw)

---
 src/backend/executor/nodeBitmapHeapscan.c | 23 +++++++----------------
 1 file changed, 7 insertions(+), 16 deletions(-)

diff --git a/src/backend/executor/nodeBitmapHeapscan.c b/src/backend/executor/nodeBitmapHeapscan.c
index 83d6478bc2b..a9e83f30687 100644
--- a/src/backend/executor/nodeBitmapHeapscan.c
+++ b/src/backend/executor/nodeBitmapHeapscan.c
@@ -79,7 +79,6 @@ typedef enum
 /* ----------------
  *	 ParallelBitmapHeapState information
  *		tbmiterator				iterator for scanning current pages
- *		mutex					mutual exclusion for state
  *		state					current state of the TIDBitmap
  *		cv						conditional wait variable
  * ----------------
@@ -87,8 +86,7 @@ typedef enum
 typedef struct ParallelBitmapHeapState
 {
 	dsa_pointer tbmiterator;
-	slock_t		mutex;
-	SharedBitmapState state;
+	pg_atomic_uint32 state;
 	ConditionVariable cv;
 } ParallelBitmapHeapState;
 
@@ -228,9 +226,7 @@ BitmapHeapNext(BitmapHeapScanState *node)
 static inline void
 BitmapDoneInitializingSharedState(ParallelBitmapHeapState *pstate)
 {
-	SpinLockAcquire(&pstate->mutex);
-	pstate->state = BM_FINISHED;
-	SpinLockRelease(&pstate->mutex);
+	pg_atomic_write_membarrier_u32(&pstate->state, BM_FINISHED);
 	ConditionVariableBroadcast(&pstate->cv);
 }
 
@@ -476,15 +472,12 @@ ExecInitBitmapHeapScan(BitmapHeapScan *node, EState *estate, int eflags)
 static bool
 BitmapShouldInitializeSharedState(ParallelBitmapHeapState *pstate)
 {
-	SharedBitmapState state;
+	uint32		state;
 
 	while (1)
 	{
-		SpinLockAcquire(&pstate->mutex);
-		state = pstate->state;
-		if (pstate->state == BM_INITIAL)
-			pstate->state = BM_INPROGRESS;
-		SpinLockRelease(&pstate->mutex);
+		state = BM_INITIAL;
+		pg_atomic_compare_exchange_u32(&pstate->state, &state, BM_INPROGRESS);
 
 		/* Exit if bitmap is done, or if we're the leader. */
 		if (state != BM_INPROGRESS)
@@ -538,9 +531,7 @@ ExecBitmapHeapInitializeDSM(BitmapHeapScanState *node,
 
 	pstate->tbmiterator = 0;
 
-	/* Initialize the mutex */
-	SpinLockInit(&pstate->mutex);
-	pstate->state = BM_INITIAL;
+	pg_atomic_init_u32(&pstate->state, BM_INITIAL);
 
 	ConditionVariableInit(&pstate->cv);
 
@@ -565,7 +556,7 @@ ExecBitmapHeapReInitializeDSM(BitmapHeapScanState *node,
 	if (dsa == NULL)
 		return;
 
-	pstate->state = BM_INITIAL;
+	pg_atomic_write_u32(&pstate->state, BM_INITIAL);
 
 	if (DsaPointerIsValid(pstate->tbmiterator))
 		tbm_free_shared_area(dsa, pstate->tbmiterator);
-- 
2.50.1 (Apple Git-155)


--Xf36GNcW+0xZNily
Content-Type: text/plain; charset=us-ascii
Content-Disposition: attachment;
	filename=v2-0003-convert-FixedParallelState-last_xlog_end-to-an-at.patch



^ permalink  raw  reply  [nested|flat] 440+ messages in thread

* [PATCH v2 2/9] convert ParallelBitmapHeapState->state to an atomic
@ 2026-07-09 18:38 Nathan Bossart <nathan@postgresql.org>
  0 siblings, 0 replies; 440+ messages in thread

From: Nathan Bossart @ 2026-07-09 18:38 UTC (permalink / raw)

---
 src/backend/executor/nodeBitmapHeapscan.c | 23 +++++++----------------
 1 file changed, 7 insertions(+), 16 deletions(-)

diff --git a/src/backend/executor/nodeBitmapHeapscan.c b/src/backend/executor/nodeBitmapHeapscan.c
index 83d6478bc2b..a9e83f30687 100644
--- a/src/backend/executor/nodeBitmapHeapscan.c
+++ b/src/backend/executor/nodeBitmapHeapscan.c
@@ -79,7 +79,6 @@ typedef enum
 /* ----------------
  *	 ParallelBitmapHeapState information
  *		tbmiterator				iterator for scanning current pages
- *		mutex					mutual exclusion for state
  *		state					current state of the TIDBitmap
  *		cv						conditional wait variable
  * ----------------
@@ -87,8 +86,7 @@ typedef enum
 typedef struct ParallelBitmapHeapState
 {
 	dsa_pointer tbmiterator;
-	slock_t		mutex;
-	SharedBitmapState state;
+	pg_atomic_uint32 state;
 	ConditionVariable cv;
 } ParallelBitmapHeapState;
 
@@ -228,9 +226,7 @@ BitmapHeapNext(BitmapHeapScanState *node)
 static inline void
 BitmapDoneInitializingSharedState(ParallelBitmapHeapState *pstate)
 {
-	SpinLockAcquire(&pstate->mutex);
-	pstate->state = BM_FINISHED;
-	SpinLockRelease(&pstate->mutex);
+	pg_atomic_write_membarrier_u32(&pstate->state, BM_FINISHED);
 	ConditionVariableBroadcast(&pstate->cv);
 }
 
@@ -476,15 +472,12 @@ ExecInitBitmapHeapScan(BitmapHeapScan *node, EState *estate, int eflags)
 static bool
 BitmapShouldInitializeSharedState(ParallelBitmapHeapState *pstate)
 {
-	SharedBitmapState state;
+	uint32		state;
 
 	while (1)
 	{
-		SpinLockAcquire(&pstate->mutex);
-		state = pstate->state;
-		if (pstate->state == BM_INITIAL)
-			pstate->state = BM_INPROGRESS;
-		SpinLockRelease(&pstate->mutex);
+		state = BM_INITIAL;
+		pg_atomic_compare_exchange_u32(&pstate->state, &state, BM_INPROGRESS);
 
 		/* Exit if bitmap is done, or if we're the leader. */
 		if (state != BM_INPROGRESS)
@@ -538,9 +531,7 @@ ExecBitmapHeapInitializeDSM(BitmapHeapScanState *node,
 
 	pstate->tbmiterator = 0;
 
-	/* Initialize the mutex */
-	SpinLockInit(&pstate->mutex);
-	pstate->state = BM_INITIAL;
+	pg_atomic_init_u32(&pstate->state, BM_INITIAL);
 
 	ConditionVariableInit(&pstate->cv);
 
@@ -565,7 +556,7 @@ ExecBitmapHeapReInitializeDSM(BitmapHeapScanState *node,
 	if (dsa == NULL)
 		return;
 
-	pstate->state = BM_INITIAL;
+	pg_atomic_write_u32(&pstate->state, BM_INITIAL);
 
 	if (DsaPointerIsValid(pstate->tbmiterator))
 		tbm_free_shared_area(dsa, pstate->tbmiterator);
-- 
2.50.1 (Apple Git-155)


--Xf36GNcW+0xZNily
Content-Type: text/plain; charset=us-ascii
Content-Disposition: attachment;
	filename=v2-0003-convert-FixedParallelState-last_xlog_end-to-an-at.patch



^ permalink  raw  reply  [nested|flat] 440+ messages in thread

* [PATCH v2 2/9] convert ParallelBitmapHeapState->state to an atomic
@ 2026-07-09 18:38 Nathan Bossart <nathan@postgresql.org>
  0 siblings, 0 replies; 440+ messages in thread

From: Nathan Bossart @ 2026-07-09 18:38 UTC (permalink / raw)

---
 src/backend/executor/nodeBitmapHeapscan.c | 23 +++++++----------------
 1 file changed, 7 insertions(+), 16 deletions(-)

diff --git a/src/backend/executor/nodeBitmapHeapscan.c b/src/backend/executor/nodeBitmapHeapscan.c
index 83d6478bc2b..a9e83f30687 100644
--- a/src/backend/executor/nodeBitmapHeapscan.c
+++ b/src/backend/executor/nodeBitmapHeapscan.c
@@ -79,7 +79,6 @@ typedef enum
 /* ----------------
  *	 ParallelBitmapHeapState information
  *		tbmiterator				iterator for scanning current pages
- *		mutex					mutual exclusion for state
  *		state					current state of the TIDBitmap
  *		cv						conditional wait variable
  * ----------------
@@ -87,8 +86,7 @@ typedef enum
 typedef struct ParallelBitmapHeapState
 {
 	dsa_pointer tbmiterator;
-	slock_t		mutex;
-	SharedBitmapState state;
+	pg_atomic_uint32 state;
 	ConditionVariable cv;
 } ParallelBitmapHeapState;
 
@@ -228,9 +226,7 @@ BitmapHeapNext(BitmapHeapScanState *node)
 static inline void
 BitmapDoneInitializingSharedState(ParallelBitmapHeapState *pstate)
 {
-	SpinLockAcquire(&pstate->mutex);
-	pstate->state = BM_FINISHED;
-	SpinLockRelease(&pstate->mutex);
+	pg_atomic_write_membarrier_u32(&pstate->state, BM_FINISHED);
 	ConditionVariableBroadcast(&pstate->cv);
 }
 
@@ -476,15 +472,12 @@ ExecInitBitmapHeapScan(BitmapHeapScan *node, EState *estate, int eflags)
 static bool
 BitmapShouldInitializeSharedState(ParallelBitmapHeapState *pstate)
 {
-	SharedBitmapState state;
+	uint32		state;
 
 	while (1)
 	{
-		SpinLockAcquire(&pstate->mutex);
-		state = pstate->state;
-		if (pstate->state == BM_INITIAL)
-			pstate->state = BM_INPROGRESS;
-		SpinLockRelease(&pstate->mutex);
+		state = BM_INITIAL;
+		pg_atomic_compare_exchange_u32(&pstate->state, &state, BM_INPROGRESS);
 
 		/* Exit if bitmap is done, or if we're the leader. */
 		if (state != BM_INPROGRESS)
@@ -538,9 +531,7 @@ ExecBitmapHeapInitializeDSM(BitmapHeapScanState *node,
 
 	pstate->tbmiterator = 0;
 
-	/* Initialize the mutex */
-	SpinLockInit(&pstate->mutex);
-	pstate->state = BM_INITIAL;
+	pg_atomic_init_u32(&pstate->state, BM_INITIAL);
 
 	ConditionVariableInit(&pstate->cv);
 
@@ -565,7 +556,7 @@ ExecBitmapHeapReInitializeDSM(BitmapHeapScanState *node,
 	if (dsa == NULL)
 		return;
 
-	pstate->state = BM_INITIAL;
+	pg_atomic_write_u32(&pstate->state, BM_INITIAL);
 
 	if (DsaPointerIsValid(pstate->tbmiterator))
 		tbm_free_shared_area(dsa, pstate->tbmiterator);
-- 
2.50.1 (Apple Git-155)


--Xf36GNcW+0xZNily
Content-Type: text/plain; charset=us-ascii
Content-Disposition: attachment;
	filename=v2-0003-convert-FixedParallelState-last_xlog_end-to-an-at.patch



^ permalink  raw  reply  [nested|flat] 440+ messages in thread

* [PATCH v2 2/9] convert ParallelBitmapHeapState->state to an atomic
@ 2026-07-09 18:38 Nathan Bossart <nathan@postgresql.org>
  0 siblings, 0 replies; 440+ messages in thread

From: Nathan Bossart @ 2026-07-09 18:38 UTC (permalink / raw)

---
 src/backend/executor/nodeBitmapHeapscan.c | 23 +++++++----------------
 1 file changed, 7 insertions(+), 16 deletions(-)

diff --git a/src/backend/executor/nodeBitmapHeapscan.c b/src/backend/executor/nodeBitmapHeapscan.c
index 83d6478bc2b..a9e83f30687 100644
--- a/src/backend/executor/nodeBitmapHeapscan.c
+++ b/src/backend/executor/nodeBitmapHeapscan.c
@@ -79,7 +79,6 @@ typedef enum
 /* ----------------
  *	 ParallelBitmapHeapState information
  *		tbmiterator				iterator for scanning current pages
- *		mutex					mutual exclusion for state
  *		state					current state of the TIDBitmap
  *		cv						conditional wait variable
  * ----------------
@@ -87,8 +86,7 @@ typedef enum
 typedef struct ParallelBitmapHeapState
 {
 	dsa_pointer tbmiterator;
-	slock_t		mutex;
-	SharedBitmapState state;
+	pg_atomic_uint32 state;
 	ConditionVariable cv;
 } ParallelBitmapHeapState;
 
@@ -228,9 +226,7 @@ BitmapHeapNext(BitmapHeapScanState *node)
 static inline void
 BitmapDoneInitializingSharedState(ParallelBitmapHeapState *pstate)
 {
-	SpinLockAcquire(&pstate->mutex);
-	pstate->state = BM_FINISHED;
-	SpinLockRelease(&pstate->mutex);
+	pg_atomic_write_membarrier_u32(&pstate->state, BM_FINISHED);
 	ConditionVariableBroadcast(&pstate->cv);
 }
 
@@ -476,15 +472,12 @@ ExecInitBitmapHeapScan(BitmapHeapScan *node, EState *estate, int eflags)
 static bool
 BitmapShouldInitializeSharedState(ParallelBitmapHeapState *pstate)
 {
-	SharedBitmapState state;
+	uint32		state;
 
 	while (1)
 	{
-		SpinLockAcquire(&pstate->mutex);
-		state = pstate->state;
-		if (pstate->state == BM_INITIAL)
-			pstate->state = BM_INPROGRESS;
-		SpinLockRelease(&pstate->mutex);
+		state = BM_INITIAL;
+		pg_atomic_compare_exchange_u32(&pstate->state, &state, BM_INPROGRESS);
 
 		/* Exit if bitmap is done, or if we're the leader. */
 		if (state != BM_INPROGRESS)
@@ -538,9 +531,7 @@ ExecBitmapHeapInitializeDSM(BitmapHeapScanState *node,
 
 	pstate->tbmiterator = 0;
 
-	/* Initialize the mutex */
-	SpinLockInit(&pstate->mutex);
-	pstate->state = BM_INITIAL;
+	pg_atomic_init_u32(&pstate->state, BM_INITIAL);
 
 	ConditionVariableInit(&pstate->cv);
 
@@ -565,7 +556,7 @@ ExecBitmapHeapReInitializeDSM(BitmapHeapScanState *node,
 	if (dsa == NULL)
 		return;
 
-	pstate->state = BM_INITIAL;
+	pg_atomic_write_u32(&pstate->state, BM_INITIAL);
 
 	if (DsaPointerIsValid(pstate->tbmiterator))
 		tbm_free_shared_area(dsa, pstate->tbmiterator);
-- 
2.50.1 (Apple Git-155)


--Xf36GNcW+0xZNily
Content-Type: text/plain; charset=us-ascii
Content-Disposition: attachment;
	filename=v2-0003-convert-FixedParallelState-last_xlog_end-to-an-at.patch



^ permalink  raw  reply  [nested|flat] 440+ messages in thread

* [PATCH v1 2/8] convert ParallelBitmapHeapState->state to an atomic
@ 2026-07-09 18:38 Nathan Bossart <nathan@postgresql.org>
  0 siblings, 0 replies; 440+ messages in thread

From: Nathan Bossart @ 2026-07-09 18:38 UTC (permalink / raw)

---
 src/backend/executor/nodeBitmapHeapscan.c | 21 ++++++---------------
 1 file changed, 6 insertions(+), 15 deletions(-)

diff --git a/src/backend/executor/nodeBitmapHeapscan.c b/src/backend/executor/nodeBitmapHeapscan.c
index 83d6478bc2b..f2bb487bf10 100644
--- a/src/backend/executor/nodeBitmapHeapscan.c
+++ b/src/backend/executor/nodeBitmapHeapscan.c
@@ -79,7 +79,6 @@ typedef enum
 /* ----------------
  *	 ParallelBitmapHeapState information
  *		tbmiterator				iterator for scanning current pages
- *		mutex					mutual exclusion for state
  *		state					current state of the TIDBitmap
  *		cv						conditional wait variable
  * ----------------
@@ -87,8 +86,7 @@ typedef enum
 typedef struct ParallelBitmapHeapState
 {
 	dsa_pointer tbmiterator;
-	slock_t		mutex;
-	SharedBitmapState state;
+	pg_atomic_uint32 state;
 	ConditionVariable cv;
 } ParallelBitmapHeapState;
 
@@ -228,9 +226,7 @@ BitmapHeapNext(BitmapHeapScanState *node)
 static inline void
 BitmapDoneInitializingSharedState(ParallelBitmapHeapState *pstate)
 {
-	SpinLockAcquire(&pstate->mutex);
-	pstate->state = BM_FINISHED;
-	SpinLockRelease(&pstate->mutex);
+	pg_atomic_write_membarrier_u32(&pstate->state, BM_FINISHED);
 	ConditionVariableBroadcast(&pstate->cv);
 }
 
@@ -480,11 +476,8 @@ BitmapShouldInitializeSharedState(ParallelBitmapHeapState *pstate)
 
 	while (1)
 	{
-		SpinLockAcquire(&pstate->mutex);
-		state = pstate->state;
-		if (pstate->state == BM_INITIAL)
-			pstate->state = BM_INPROGRESS;
-		SpinLockRelease(&pstate->mutex);
+		state = BM_INITIAL;
+		pg_atomic_compare_exchange_u32(&pstate->state, &state, BM_INPROGRESS);
 
 		/* Exit if bitmap is done, or if we're the leader. */
 		if (state != BM_INPROGRESS)
@@ -538,9 +531,7 @@ ExecBitmapHeapInitializeDSM(BitmapHeapScanState *node,
 
 	pstate->tbmiterator = 0;
 
-	/* Initialize the mutex */
-	SpinLockInit(&pstate->mutex);
-	pstate->state = BM_INITIAL;
+	pg_atomic_init_u32(&pstate->state, BM_INITIAL);
 
 	ConditionVariableInit(&pstate->cv);
 
@@ -565,7 +556,7 @@ ExecBitmapHeapReInitializeDSM(BitmapHeapScanState *node,
 	if (dsa == NULL)
 		return;
 
-	pstate->state = BM_INITIAL;
+	pg_atomic_write_u32(&pstate->state, BM_INITIAL);
 
 	if (DsaPointerIsValid(pstate->tbmiterator))
 		tbm_free_shared_area(dsa, pstate->tbmiterator);
-- 
2.50.1 (Apple Git-155)


--Ot5x3ffkWEuxilWO
Content-Type: text/plain; charset=us-ascii
Content-Disposition: attachment;
	filename=v1-0003-convert-FixedParallelState-last_xlog_end-to-an-at.patch



^ permalink  raw  reply  [nested|flat] 440+ messages in thread

* [PATCH v1 2/8] convert ParallelBitmapHeapState->state to an atomic
@ 2026-07-09 18:38 Nathan Bossart <nathan@postgresql.org>
  0 siblings, 0 replies; 440+ messages in thread

From: Nathan Bossart @ 2026-07-09 18:38 UTC (permalink / raw)

---
 src/backend/executor/nodeBitmapHeapscan.c | 21 ++++++---------------
 1 file changed, 6 insertions(+), 15 deletions(-)

diff --git a/src/backend/executor/nodeBitmapHeapscan.c b/src/backend/executor/nodeBitmapHeapscan.c
index 83d6478bc2b..f2bb487bf10 100644
--- a/src/backend/executor/nodeBitmapHeapscan.c
+++ b/src/backend/executor/nodeBitmapHeapscan.c
@@ -79,7 +79,6 @@ typedef enum
 /* ----------------
  *	 ParallelBitmapHeapState information
  *		tbmiterator				iterator for scanning current pages
- *		mutex					mutual exclusion for state
  *		state					current state of the TIDBitmap
  *		cv						conditional wait variable
  * ----------------
@@ -87,8 +86,7 @@ typedef enum
 typedef struct ParallelBitmapHeapState
 {
 	dsa_pointer tbmiterator;
-	slock_t		mutex;
-	SharedBitmapState state;
+	pg_atomic_uint32 state;
 	ConditionVariable cv;
 } ParallelBitmapHeapState;
 
@@ -228,9 +226,7 @@ BitmapHeapNext(BitmapHeapScanState *node)
 static inline void
 BitmapDoneInitializingSharedState(ParallelBitmapHeapState *pstate)
 {
-	SpinLockAcquire(&pstate->mutex);
-	pstate->state = BM_FINISHED;
-	SpinLockRelease(&pstate->mutex);
+	pg_atomic_write_membarrier_u32(&pstate->state, BM_FINISHED);
 	ConditionVariableBroadcast(&pstate->cv);
 }
 
@@ -480,11 +476,8 @@ BitmapShouldInitializeSharedState(ParallelBitmapHeapState *pstate)
 
 	while (1)
 	{
-		SpinLockAcquire(&pstate->mutex);
-		state = pstate->state;
-		if (pstate->state == BM_INITIAL)
-			pstate->state = BM_INPROGRESS;
-		SpinLockRelease(&pstate->mutex);
+		state = BM_INITIAL;
+		pg_atomic_compare_exchange_u32(&pstate->state, &state, BM_INPROGRESS);
 
 		/* Exit if bitmap is done, or if we're the leader. */
 		if (state != BM_INPROGRESS)
@@ -538,9 +531,7 @@ ExecBitmapHeapInitializeDSM(BitmapHeapScanState *node,
 
 	pstate->tbmiterator = 0;
 
-	/* Initialize the mutex */
-	SpinLockInit(&pstate->mutex);
-	pstate->state = BM_INITIAL;
+	pg_atomic_init_u32(&pstate->state, BM_INITIAL);
 
 	ConditionVariableInit(&pstate->cv);
 
@@ -565,7 +556,7 @@ ExecBitmapHeapReInitializeDSM(BitmapHeapScanState *node,
 	if (dsa == NULL)
 		return;
 
-	pstate->state = BM_INITIAL;
+	pg_atomic_write_u32(&pstate->state, BM_INITIAL);
 
 	if (DsaPointerIsValid(pstate->tbmiterator))
 		tbm_free_shared_area(dsa, pstate->tbmiterator);
-- 
2.50.1 (Apple Git-155)


--Ot5x3ffkWEuxilWO
Content-Type: text/plain; charset=us-ascii
Content-Disposition: attachment;
	filename=v1-0003-convert-FixedParallelState-last_xlog_end-to-an-at.patch



^ permalink  raw  reply  [nested|flat] 440+ messages in thread

* [PATCH v2 2/9] convert ParallelBitmapHeapState->state to an atomic
@ 2026-07-09 18:38 Nathan Bossart <nathan@postgresql.org>
  0 siblings, 0 replies; 440+ messages in thread

From: Nathan Bossart @ 2026-07-09 18:38 UTC (permalink / raw)

---
 src/backend/executor/nodeBitmapHeapscan.c | 23 +++++++----------------
 1 file changed, 7 insertions(+), 16 deletions(-)

diff --git a/src/backend/executor/nodeBitmapHeapscan.c b/src/backend/executor/nodeBitmapHeapscan.c
index 83d6478bc2b..a9e83f30687 100644
--- a/src/backend/executor/nodeBitmapHeapscan.c
+++ b/src/backend/executor/nodeBitmapHeapscan.c
@@ -79,7 +79,6 @@ typedef enum
 /* ----------------
  *	 ParallelBitmapHeapState information
  *		tbmiterator				iterator for scanning current pages
- *		mutex					mutual exclusion for state
  *		state					current state of the TIDBitmap
  *		cv						conditional wait variable
  * ----------------
@@ -87,8 +86,7 @@ typedef enum
 typedef struct ParallelBitmapHeapState
 {
 	dsa_pointer tbmiterator;
-	slock_t		mutex;
-	SharedBitmapState state;
+	pg_atomic_uint32 state;
 	ConditionVariable cv;
 } ParallelBitmapHeapState;
 
@@ -228,9 +226,7 @@ BitmapHeapNext(BitmapHeapScanState *node)
 static inline void
 BitmapDoneInitializingSharedState(ParallelBitmapHeapState *pstate)
 {
-	SpinLockAcquire(&pstate->mutex);
-	pstate->state = BM_FINISHED;
-	SpinLockRelease(&pstate->mutex);
+	pg_atomic_write_membarrier_u32(&pstate->state, BM_FINISHED);
 	ConditionVariableBroadcast(&pstate->cv);
 }
 
@@ -476,15 +472,12 @@ ExecInitBitmapHeapScan(BitmapHeapScan *node, EState *estate, int eflags)
 static bool
 BitmapShouldInitializeSharedState(ParallelBitmapHeapState *pstate)
 {
-	SharedBitmapState state;
+	uint32		state;
 
 	while (1)
 	{
-		SpinLockAcquire(&pstate->mutex);
-		state = pstate->state;
-		if (pstate->state == BM_INITIAL)
-			pstate->state = BM_INPROGRESS;
-		SpinLockRelease(&pstate->mutex);
+		state = BM_INITIAL;
+		pg_atomic_compare_exchange_u32(&pstate->state, &state, BM_INPROGRESS);
 
 		/* Exit if bitmap is done, or if we're the leader. */
 		if (state != BM_INPROGRESS)
@@ -538,9 +531,7 @@ ExecBitmapHeapInitializeDSM(BitmapHeapScanState *node,
 
 	pstate->tbmiterator = 0;
 
-	/* Initialize the mutex */
-	SpinLockInit(&pstate->mutex);
-	pstate->state = BM_INITIAL;
+	pg_atomic_init_u32(&pstate->state, BM_INITIAL);
 
 	ConditionVariableInit(&pstate->cv);
 
@@ -565,7 +556,7 @@ ExecBitmapHeapReInitializeDSM(BitmapHeapScanState *node,
 	if (dsa == NULL)
 		return;
 
-	pstate->state = BM_INITIAL;
+	pg_atomic_write_u32(&pstate->state, BM_INITIAL);
 
 	if (DsaPointerIsValid(pstate->tbmiterator))
 		tbm_free_shared_area(dsa, pstate->tbmiterator);
-- 
2.50.1 (Apple Git-155)


--Xf36GNcW+0xZNily
Content-Type: text/plain; charset=us-ascii
Content-Disposition: attachment;
	filename=v2-0003-convert-FixedParallelState-last_xlog_end-to-an-at.patch



^ permalink  raw  reply  [nested|flat] 440+ messages in thread

* [PATCH v2 2/9] convert ParallelBitmapHeapState->state to an atomic
@ 2026-07-09 18:38 Nathan Bossart <nathan@postgresql.org>
  0 siblings, 0 replies; 440+ messages in thread

From: Nathan Bossart @ 2026-07-09 18:38 UTC (permalink / raw)

---
 src/backend/executor/nodeBitmapHeapscan.c | 23 +++++++----------------
 1 file changed, 7 insertions(+), 16 deletions(-)

diff --git a/src/backend/executor/nodeBitmapHeapscan.c b/src/backend/executor/nodeBitmapHeapscan.c
index 83d6478bc2b..a9e83f30687 100644
--- a/src/backend/executor/nodeBitmapHeapscan.c
+++ b/src/backend/executor/nodeBitmapHeapscan.c
@@ -79,7 +79,6 @@ typedef enum
 /* ----------------
  *	 ParallelBitmapHeapState information
  *		tbmiterator				iterator for scanning current pages
- *		mutex					mutual exclusion for state
  *		state					current state of the TIDBitmap
  *		cv						conditional wait variable
  * ----------------
@@ -87,8 +86,7 @@ typedef enum
 typedef struct ParallelBitmapHeapState
 {
 	dsa_pointer tbmiterator;
-	slock_t		mutex;
-	SharedBitmapState state;
+	pg_atomic_uint32 state;
 	ConditionVariable cv;
 } ParallelBitmapHeapState;
 
@@ -228,9 +226,7 @@ BitmapHeapNext(BitmapHeapScanState *node)
 static inline void
 BitmapDoneInitializingSharedState(ParallelBitmapHeapState *pstate)
 {
-	SpinLockAcquire(&pstate->mutex);
-	pstate->state = BM_FINISHED;
-	SpinLockRelease(&pstate->mutex);
+	pg_atomic_write_membarrier_u32(&pstate->state, BM_FINISHED);
 	ConditionVariableBroadcast(&pstate->cv);
 }
 
@@ -476,15 +472,12 @@ ExecInitBitmapHeapScan(BitmapHeapScan *node, EState *estate, int eflags)
 static bool
 BitmapShouldInitializeSharedState(ParallelBitmapHeapState *pstate)
 {
-	SharedBitmapState state;
+	uint32		state;
 
 	while (1)
 	{
-		SpinLockAcquire(&pstate->mutex);
-		state = pstate->state;
-		if (pstate->state == BM_INITIAL)
-			pstate->state = BM_INPROGRESS;
-		SpinLockRelease(&pstate->mutex);
+		state = BM_INITIAL;
+		pg_atomic_compare_exchange_u32(&pstate->state, &state, BM_INPROGRESS);
 
 		/* Exit if bitmap is done, or if we're the leader. */
 		if (state != BM_INPROGRESS)
@@ -538,9 +531,7 @@ ExecBitmapHeapInitializeDSM(BitmapHeapScanState *node,
 
 	pstate->tbmiterator = 0;
 
-	/* Initialize the mutex */
-	SpinLockInit(&pstate->mutex);
-	pstate->state = BM_INITIAL;
+	pg_atomic_init_u32(&pstate->state, BM_INITIAL);
 
 	ConditionVariableInit(&pstate->cv);
 
@@ -565,7 +556,7 @@ ExecBitmapHeapReInitializeDSM(BitmapHeapScanState *node,
 	if (dsa == NULL)
 		return;
 
-	pstate->state = BM_INITIAL;
+	pg_atomic_write_u32(&pstate->state, BM_INITIAL);
 
 	if (DsaPointerIsValid(pstate->tbmiterator))
 		tbm_free_shared_area(dsa, pstate->tbmiterator);
-- 
2.50.1 (Apple Git-155)


--Xf36GNcW+0xZNily
Content-Type: text/plain; charset=us-ascii
Content-Disposition: attachment;
	filename=v2-0003-convert-FixedParallelState-last_xlog_end-to-an-at.patch



^ permalink  raw  reply  [nested|flat] 440+ messages in thread

* [PATCH v2 2/9] convert ParallelBitmapHeapState->state to an atomic
@ 2026-07-09 18:38 Nathan Bossart <nathan@postgresql.org>
  0 siblings, 0 replies; 440+ messages in thread

From: Nathan Bossart @ 2026-07-09 18:38 UTC (permalink / raw)

---
 src/backend/executor/nodeBitmapHeapscan.c | 23 +++++++----------------
 1 file changed, 7 insertions(+), 16 deletions(-)

diff --git a/src/backend/executor/nodeBitmapHeapscan.c b/src/backend/executor/nodeBitmapHeapscan.c
index 83d6478bc2b..a9e83f30687 100644
--- a/src/backend/executor/nodeBitmapHeapscan.c
+++ b/src/backend/executor/nodeBitmapHeapscan.c
@@ -79,7 +79,6 @@ typedef enum
 /* ----------------
  *	 ParallelBitmapHeapState information
  *		tbmiterator				iterator for scanning current pages
- *		mutex					mutual exclusion for state
  *		state					current state of the TIDBitmap
  *		cv						conditional wait variable
  * ----------------
@@ -87,8 +86,7 @@ typedef enum
 typedef struct ParallelBitmapHeapState
 {
 	dsa_pointer tbmiterator;
-	slock_t		mutex;
-	SharedBitmapState state;
+	pg_atomic_uint32 state;
 	ConditionVariable cv;
 } ParallelBitmapHeapState;
 
@@ -228,9 +226,7 @@ BitmapHeapNext(BitmapHeapScanState *node)
 static inline void
 BitmapDoneInitializingSharedState(ParallelBitmapHeapState *pstate)
 {
-	SpinLockAcquire(&pstate->mutex);
-	pstate->state = BM_FINISHED;
-	SpinLockRelease(&pstate->mutex);
+	pg_atomic_write_membarrier_u32(&pstate->state, BM_FINISHED);
 	ConditionVariableBroadcast(&pstate->cv);
 }
 
@@ -476,15 +472,12 @@ ExecInitBitmapHeapScan(BitmapHeapScan *node, EState *estate, int eflags)
 static bool
 BitmapShouldInitializeSharedState(ParallelBitmapHeapState *pstate)
 {
-	SharedBitmapState state;
+	uint32		state;
 
 	while (1)
 	{
-		SpinLockAcquire(&pstate->mutex);
-		state = pstate->state;
-		if (pstate->state == BM_INITIAL)
-			pstate->state = BM_INPROGRESS;
-		SpinLockRelease(&pstate->mutex);
+		state = BM_INITIAL;
+		pg_atomic_compare_exchange_u32(&pstate->state, &state, BM_INPROGRESS);
 
 		/* Exit if bitmap is done, or if we're the leader. */
 		if (state != BM_INPROGRESS)
@@ -538,9 +531,7 @@ ExecBitmapHeapInitializeDSM(BitmapHeapScanState *node,
 
 	pstate->tbmiterator = 0;
 
-	/* Initialize the mutex */
-	SpinLockInit(&pstate->mutex);
-	pstate->state = BM_INITIAL;
+	pg_atomic_init_u32(&pstate->state, BM_INITIAL);
 
 	ConditionVariableInit(&pstate->cv);
 
@@ -565,7 +556,7 @@ ExecBitmapHeapReInitializeDSM(BitmapHeapScanState *node,
 	if (dsa == NULL)
 		return;
 
-	pstate->state = BM_INITIAL;
+	pg_atomic_write_u32(&pstate->state, BM_INITIAL);
 
 	if (DsaPointerIsValid(pstate->tbmiterator))
 		tbm_free_shared_area(dsa, pstate->tbmiterator);
-- 
2.50.1 (Apple Git-155)


--Xf36GNcW+0xZNily
Content-Type: text/plain; charset=us-ascii
Content-Disposition: attachment;
	filename=v2-0003-convert-FixedParallelState-last_xlog_end-to-an-at.patch



^ permalink  raw  reply  [nested|flat] 440+ messages in thread

* [PATCH v1 2/8] convert ParallelBitmapHeapState->state to an atomic
@ 2026-07-09 18:38 Nathan Bossart <nathan@postgresql.org>
  0 siblings, 0 replies; 440+ messages in thread

From: Nathan Bossart @ 2026-07-09 18:38 UTC (permalink / raw)

---
 src/backend/executor/nodeBitmapHeapscan.c | 21 ++++++---------------
 1 file changed, 6 insertions(+), 15 deletions(-)

diff --git a/src/backend/executor/nodeBitmapHeapscan.c b/src/backend/executor/nodeBitmapHeapscan.c
index 83d6478bc2b..f2bb487bf10 100644
--- a/src/backend/executor/nodeBitmapHeapscan.c
+++ b/src/backend/executor/nodeBitmapHeapscan.c
@@ -79,7 +79,6 @@ typedef enum
 /* ----------------
  *	 ParallelBitmapHeapState information
  *		tbmiterator				iterator for scanning current pages
- *		mutex					mutual exclusion for state
  *		state					current state of the TIDBitmap
  *		cv						conditional wait variable
  * ----------------
@@ -87,8 +86,7 @@ typedef enum
 typedef struct ParallelBitmapHeapState
 {
 	dsa_pointer tbmiterator;
-	slock_t		mutex;
-	SharedBitmapState state;
+	pg_atomic_uint32 state;
 	ConditionVariable cv;
 } ParallelBitmapHeapState;
 
@@ -228,9 +226,7 @@ BitmapHeapNext(BitmapHeapScanState *node)
 static inline void
 BitmapDoneInitializingSharedState(ParallelBitmapHeapState *pstate)
 {
-	SpinLockAcquire(&pstate->mutex);
-	pstate->state = BM_FINISHED;
-	SpinLockRelease(&pstate->mutex);
+	pg_atomic_write_membarrier_u32(&pstate->state, BM_FINISHED);
 	ConditionVariableBroadcast(&pstate->cv);
 }
 
@@ -480,11 +476,8 @@ BitmapShouldInitializeSharedState(ParallelBitmapHeapState *pstate)
 
 	while (1)
 	{
-		SpinLockAcquire(&pstate->mutex);
-		state = pstate->state;
-		if (pstate->state == BM_INITIAL)
-			pstate->state = BM_INPROGRESS;
-		SpinLockRelease(&pstate->mutex);
+		state = BM_INITIAL;
+		pg_atomic_compare_exchange_u32(&pstate->state, &state, BM_INPROGRESS);
 
 		/* Exit if bitmap is done, or if we're the leader. */
 		if (state != BM_INPROGRESS)
@@ -538,9 +531,7 @@ ExecBitmapHeapInitializeDSM(BitmapHeapScanState *node,
 
 	pstate->tbmiterator = 0;
 
-	/* Initialize the mutex */
-	SpinLockInit(&pstate->mutex);
-	pstate->state = BM_INITIAL;
+	pg_atomic_init_u32(&pstate->state, BM_INITIAL);
 
 	ConditionVariableInit(&pstate->cv);
 
@@ -565,7 +556,7 @@ ExecBitmapHeapReInitializeDSM(BitmapHeapScanState *node,
 	if (dsa == NULL)
 		return;
 
-	pstate->state = BM_INITIAL;
+	pg_atomic_write_u32(&pstate->state, BM_INITIAL);
 
 	if (DsaPointerIsValid(pstate->tbmiterator))
 		tbm_free_shared_area(dsa, pstate->tbmiterator);
-- 
2.50.1 (Apple Git-155)


--Ot5x3ffkWEuxilWO
Content-Type: text/plain; charset=us-ascii
Content-Disposition: attachment;
	filename=v1-0003-convert-FixedParallelState-last_xlog_end-to-an-at.patch



^ permalink  raw  reply  [nested|flat] 440+ messages in thread

* [PATCH v1 2/8] convert ParallelBitmapHeapState->state to an atomic
@ 2026-07-09 18:38 Nathan Bossart <nathan@postgresql.org>
  0 siblings, 0 replies; 440+ messages in thread

From: Nathan Bossart @ 2026-07-09 18:38 UTC (permalink / raw)

---
 src/backend/executor/nodeBitmapHeapscan.c | 21 ++++++---------------
 1 file changed, 6 insertions(+), 15 deletions(-)

diff --git a/src/backend/executor/nodeBitmapHeapscan.c b/src/backend/executor/nodeBitmapHeapscan.c
index 83d6478bc2b..f2bb487bf10 100644
--- a/src/backend/executor/nodeBitmapHeapscan.c
+++ b/src/backend/executor/nodeBitmapHeapscan.c
@@ -79,7 +79,6 @@ typedef enum
 /* ----------------
  *	 ParallelBitmapHeapState information
  *		tbmiterator				iterator for scanning current pages
- *		mutex					mutual exclusion for state
  *		state					current state of the TIDBitmap
  *		cv						conditional wait variable
  * ----------------
@@ -87,8 +86,7 @@ typedef enum
 typedef struct ParallelBitmapHeapState
 {
 	dsa_pointer tbmiterator;
-	slock_t		mutex;
-	SharedBitmapState state;
+	pg_atomic_uint32 state;
 	ConditionVariable cv;
 } ParallelBitmapHeapState;
 
@@ -228,9 +226,7 @@ BitmapHeapNext(BitmapHeapScanState *node)
 static inline void
 BitmapDoneInitializingSharedState(ParallelBitmapHeapState *pstate)
 {
-	SpinLockAcquire(&pstate->mutex);
-	pstate->state = BM_FINISHED;
-	SpinLockRelease(&pstate->mutex);
+	pg_atomic_write_membarrier_u32(&pstate->state, BM_FINISHED);
 	ConditionVariableBroadcast(&pstate->cv);
 }
 
@@ -480,11 +476,8 @@ BitmapShouldInitializeSharedState(ParallelBitmapHeapState *pstate)
 
 	while (1)
 	{
-		SpinLockAcquire(&pstate->mutex);
-		state = pstate->state;
-		if (pstate->state == BM_INITIAL)
-			pstate->state = BM_INPROGRESS;
-		SpinLockRelease(&pstate->mutex);
+		state = BM_INITIAL;
+		pg_atomic_compare_exchange_u32(&pstate->state, &state, BM_INPROGRESS);
 
 		/* Exit if bitmap is done, or if we're the leader. */
 		if (state != BM_INPROGRESS)
@@ -538,9 +531,7 @@ ExecBitmapHeapInitializeDSM(BitmapHeapScanState *node,
 
 	pstate->tbmiterator = 0;
 
-	/* Initialize the mutex */
-	SpinLockInit(&pstate->mutex);
-	pstate->state = BM_INITIAL;
+	pg_atomic_init_u32(&pstate->state, BM_INITIAL);
 
 	ConditionVariableInit(&pstate->cv);
 
@@ -565,7 +556,7 @@ ExecBitmapHeapReInitializeDSM(BitmapHeapScanState *node,
 	if (dsa == NULL)
 		return;
 
-	pstate->state = BM_INITIAL;
+	pg_atomic_write_u32(&pstate->state, BM_INITIAL);
 
 	if (DsaPointerIsValid(pstate->tbmiterator))
 		tbm_free_shared_area(dsa, pstate->tbmiterator);
-- 
2.50.1 (Apple Git-155)


--Ot5x3ffkWEuxilWO
Content-Type: text/plain; charset=us-ascii
Content-Disposition: attachment;
	filename=v1-0003-convert-FixedParallelState-last_xlog_end-to-an-at.patch



^ permalink  raw  reply  [nested|flat] 440+ messages in thread

* [PATCH v1 2/8] convert ParallelBitmapHeapState->state to an atomic
@ 2026-07-09 18:38 Nathan Bossart <nathan@postgresql.org>
  0 siblings, 0 replies; 440+ messages in thread

From: Nathan Bossart @ 2026-07-09 18:38 UTC (permalink / raw)

---
 src/backend/executor/nodeBitmapHeapscan.c | 21 ++++++---------------
 1 file changed, 6 insertions(+), 15 deletions(-)

diff --git a/src/backend/executor/nodeBitmapHeapscan.c b/src/backend/executor/nodeBitmapHeapscan.c
index 83d6478bc2b..f2bb487bf10 100644
--- a/src/backend/executor/nodeBitmapHeapscan.c
+++ b/src/backend/executor/nodeBitmapHeapscan.c
@@ -79,7 +79,6 @@ typedef enum
 /* ----------------
  *	 ParallelBitmapHeapState information
  *		tbmiterator				iterator for scanning current pages
- *		mutex					mutual exclusion for state
  *		state					current state of the TIDBitmap
  *		cv						conditional wait variable
  * ----------------
@@ -87,8 +86,7 @@ typedef enum
 typedef struct ParallelBitmapHeapState
 {
 	dsa_pointer tbmiterator;
-	slock_t		mutex;
-	SharedBitmapState state;
+	pg_atomic_uint32 state;
 	ConditionVariable cv;
 } ParallelBitmapHeapState;
 
@@ -228,9 +226,7 @@ BitmapHeapNext(BitmapHeapScanState *node)
 static inline void
 BitmapDoneInitializingSharedState(ParallelBitmapHeapState *pstate)
 {
-	SpinLockAcquire(&pstate->mutex);
-	pstate->state = BM_FINISHED;
-	SpinLockRelease(&pstate->mutex);
+	pg_atomic_write_membarrier_u32(&pstate->state, BM_FINISHED);
 	ConditionVariableBroadcast(&pstate->cv);
 }
 
@@ -480,11 +476,8 @@ BitmapShouldInitializeSharedState(ParallelBitmapHeapState *pstate)
 
 	while (1)
 	{
-		SpinLockAcquire(&pstate->mutex);
-		state = pstate->state;
-		if (pstate->state == BM_INITIAL)
-			pstate->state = BM_INPROGRESS;
-		SpinLockRelease(&pstate->mutex);
+		state = BM_INITIAL;
+		pg_atomic_compare_exchange_u32(&pstate->state, &state, BM_INPROGRESS);
 
 		/* Exit if bitmap is done, or if we're the leader. */
 		if (state != BM_INPROGRESS)
@@ -538,9 +531,7 @@ ExecBitmapHeapInitializeDSM(BitmapHeapScanState *node,
 
 	pstate->tbmiterator = 0;
 
-	/* Initialize the mutex */
-	SpinLockInit(&pstate->mutex);
-	pstate->state = BM_INITIAL;
+	pg_atomic_init_u32(&pstate->state, BM_INITIAL);
 
 	ConditionVariableInit(&pstate->cv);
 
@@ -565,7 +556,7 @@ ExecBitmapHeapReInitializeDSM(BitmapHeapScanState *node,
 	if (dsa == NULL)
 		return;
 
-	pstate->state = BM_INITIAL;
+	pg_atomic_write_u32(&pstate->state, BM_INITIAL);
 
 	if (DsaPointerIsValid(pstate->tbmiterator))
 		tbm_free_shared_area(dsa, pstate->tbmiterator);
-- 
2.50.1 (Apple Git-155)


--Ot5x3ffkWEuxilWO
Content-Type: text/plain; charset=us-ascii
Content-Disposition: attachment;
	filename=v1-0003-convert-FixedParallelState-last_xlog_end-to-an-at.patch



^ permalink  raw  reply  [nested|flat] 440+ messages in thread

* [PATCH v2 2/9] convert ParallelBitmapHeapState->state to an atomic
@ 2026-07-09 18:38 Nathan Bossart <nathan@postgresql.org>
  0 siblings, 0 replies; 440+ messages in thread

From: Nathan Bossart @ 2026-07-09 18:38 UTC (permalink / raw)

---
 src/backend/executor/nodeBitmapHeapscan.c | 23 +++++++----------------
 1 file changed, 7 insertions(+), 16 deletions(-)

diff --git a/src/backend/executor/nodeBitmapHeapscan.c b/src/backend/executor/nodeBitmapHeapscan.c
index 83d6478bc2b..a9e83f30687 100644
--- a/src/backend/executor/nodeBitmapHeapscan.c
+++ b/src/backend/executor/nodeBitmapHeapscan.c
@@ -79,7 +79,6 @@ typedef enum
 /* ----------------
  *	 ParallelBitmapHeapState information
  *		tbmiterator				iterator for scanning current pages
- *		mutex					mutual exclusion for state
  *		state					current state of the TIDBitmap
  *		cv						conditional wait variable
  * ----------------
@@ -87,8 +86,7 @@ typedef enum
 typedef struct ParallelBitmapHeapState
 {
 	dsa_pointer tbmiterator;
-	slock_t		mutex;
-	SharedBitmapState state;
+	pg_atomic_uint32 state;
 	ConditionVariable cv;
 } ParallelBitmapHeapState;
 
@@ -228,9 +226,7 @@ BitmapHeapNext(BitmapHeapScanState *node)
 static inline void
 BitmapDoneInitializingSharedState(ParallelBitmapHeapState *pstate)
 {
-	SpinLockAcquire(&pstate->mutex);
-	pstate->state = BM_FINISHED;
-	SpinLockRelease(&pstate->mutex);
+	pg_atomic_write_membarrier_u32(&pstate->state, BM_FINISHED);
 	ConditionVariableBroadcast(&pstate->cv);
 }
 
@@ -476,15 +472,12 @@ ExecInitBitmapHeapScan(BitmapHeapScan *node, EState *estate, int eflags)
 static bool
 BitmapShouldInitializeSharedState(ParallelBitmapHeapState *pstate)
 {
-	SharedBitmapState state;
+	uint32		state;
 
 	while (1)
 	{
-		SpinLockAcquire(&pstate->mutex);
-		state = pstate->state;
-		if (pstate->state == BM_INITIAL)
-			pstate->state = BM_INPROGRESS;
-		SpinLockRelease(&pstate->mutex);
+		state = BM_INITIAL;
+		pg_atomic_compare_exchange_u32(&pstate->state, &state, BM_INPROGRESS);
 
 		/* Exit if bitmap is done, or if we're the leader. */
 		if (state != BM_INPROGRESS)
@@ -538,9 +531,7 @@ ExecBitmapHeapInitializeDSM(BitmapHeapScanState *node,
 
 	pstate->tbmiterator = 0;
 
-	/* Initialize the mutex */
-	SpinLockInit(&pstate->mutex);
-	pstate->state = BM_INITIAL;
+	pg_atomic_init_u32(&pstate->state, BM_INITIAL);
 
 	ConditionVariableInit(&pstate->cv);
 
@@ -565,7 +556,7 @@ ExecBitmapHeapReInitializeDSM(BitmapHeapScanState *node,
 	if (dsa == NULL)
 		return;
 
-	pstate->state = BM_INITIAL;
+	pg_atomic_write_u32(&pstate->state, BM_INITIAL);
 
 	if (DsaPointerIsValid(pstate->tbmiterator))
 		tbm_free_shared_area(dsa, pstate->tbmiterator);
-- 
2.50.1 (Apple Git-155)


--Xf36GNcW+0xZNily
Content-Type: text/plain; charset=us-ascii
Content-Disposition: attachment;
	filename=v2-0003-convert-FixedParallelState-last_xlog_end-to-an-at.patch



^ permalink  raw  reply  [nested|flat] 440+ messages in thread

* [PATCH v2 2/9] convert ParallelBitmapHeapState->state to an atomic
@ 2026-07-09 18:38 Nathan Bossart <nathan@postgresql.org>
  0 siblings, 0 replies; 440+ messages in thread

From: Nathan Bossart @ 2026-07-09 18:38 UTC (permalink / raw)

---
 src/backend/executor/nodeBitmapHeapscan.c | 23 +++++++----------------
 1 file changed, 7 insertions(+), 16 deletions(-)

diff --git a/src/backend/executor/nodeBitmapHeapscan.c b/src/backend/executor/nodeBitmapHeapscan.c
index 83d6478bc2b..a9e83f30687 100644
--- a/src/backend/executor/nodeBitmapHeapscan.c
+++ b/src/backend/executor/nodeBitmapHeapscan.c
@@ -79,7 +79,6 @@ typedef enum
 /* ----------------
  *	 ParallelBitmapHeapState information
  *		tbmiterator				iterator for scanning current pages
- *		mutex					mutual exclusion for state
  *		state					current state of the TIDBitmap
  *		cv						conditional wait variable
  * ----------------
@@ -87,8 +86,7 @@ typedef enum
 typedef struct ParallelBitmapHeapState
 {
 	dsa_pointer tbmiterator;
-	slock_t		mutex;
-	SharedBitmapState state;
+	pg_atomic_uint32 state;
 	ConditionVariable cv;
 } ParallelBitmapHeapState;
 
@@ -228,9 +226,7 @@ BitmapHeapNext(BitmapHeapScanState *node)
 static inline void
 BitmapDoneInitializingSharedState(ParallelBitmapHeapState *pstate)
 {
-	SpinLockAcquire(&pstate->mutex);
-	pstate->state = BM_FINISHED;
-	SpinLockRelease(&pstate->mutex);
+	pg_atomic_write_membarrier_u32(&pstate->state, BM_FINISHED);
 	ConditionVariableBroadcast(&pstate->cv);
 }
 
@@ -476,15 +472,12 @@ ExecInitBitmapHeapScan(BitmapHeapScan *node, EState *estate, int eflags)
 static bool
 BitmapShouldInitializeSharedState(ParallelBitmapHeapState *pstate)
 {
-	SharedBitmapState state;
+	uint32		state;
 
 	while (1)
 	{
-		SpinLockAcquire(&pstate->mutex);
-		state = pstate->state;
-		if (pstate->state == BM_INITIAL)
-			pstate->state = BM_INPROGRESS;
-		SpinLockRelease(&pstate->mutex);
+		state = BM_INITIAL;
+		pg_atomic_compare_exchange_u32(&pstate->state, &state, BM_INPROGRESS);
 
 		/* Exit if bitmap is done, or if we're the leader. */
 		if (state != BM_INPROGRESS)
@@ -538,9 +531,7 @@ ExecBitmapHeapInitializeDSM(BitmapHeapScanState *node,
 
 	pstate->tbmiterator = 0;
 
-	/* Initialize the mutex */
-	SpinLockInit(&pstate->mutex);
-	pstate->state = BM_INITIAL;
+	pg_atomic_init_u32(&pstate->state, BM_INITIAL);
 
 	ConditionVariableInit(&pstate->cv);
 
@@ -565,7 +556,7 @@ ExecBitmapHeapReInitializeDSM(BitmapHeapScanState *node,
 	if (dsa == NULL)
 		return;
 
-	pstate->state = BM_INITIAL;
+	pg_atomic_write_u32(&pstate->state, BM_INITIAL);
 
 	if (DsaPointerIsValid(pstate->tbmiterator))
 		tbm_free_shared_area(dsa, pstate->tbmiterator);
-- 
2.50.1 (Apple Git-155)


--Xf36GNcW+0xZNily
Content-Type: text/plain; charset=us-ascii
Content-Disposition: attachment;
	filename=v2-0003-convert-FixedParallelState-last_xlog_end-to-an-at.patch



^ permalink  raw  reply  [nested|flat] 440+ messages in thread

* [PATCH v2 2/9] convert ParallelBitmapHeapState->state to an atomic
@ 2026-07-09 18:38 Nathan Bossart <nathan@postgresql.org>
  0 siblings, 0 replies; 440+ messages in thread

From: Nathan Bossart @ 2026-07-09 18:38 UTC (permalink / raw)

---
 src/backend/executor/nodeBitmapHeapscan.c | 23 +++++++----------------
 1 file changed, 7 insertions(+), 16 deletions(-)

diff --git a/src/backend/executor/nodeBitmapHeapscan.c b/src/backend/executor/nodeBitmapHeapscan.c
index 83d6478bc2b..a9e83f30687 100644
--- a/src/backend/executor/nodeBitmapHeapscan.c
+++ b/src/backend/executor/nodeBitmapHeapscan.c
@@ -79,7 +79,6 @@ typedef enum
 /* ----------------
  *	 ParallelBitmapHeapState information
  *		tbmiterator				iterator for scanning current pages
- *		mutex					mutual exclusion for state
  *		state					current state of the TIDBitmap
  *		cv						conditional wait variable
  * ----------------
@@ -87,8 +86,7 @@ typedef enum
 typedef struct ParallelBitmapHeapState
 {
 	dsa_pointer tbmiterator;
-	slock_t		mutex;
-	SharedBitmapState state;
+	pg_atomic_uint32 state;
 	ConditionVariable cv;
 } ParallelBitmapHeapState;
 
@@ -228,9 +226,7 @@ BitmapHeapNext(BitmapHeapScanState *node)
 static inline void
 BitmapDoneInitializingSharedState(ParallelBitmapHeapState *pstate)
 {
-	SpinLockAcquire(&pstate->mutex);
-	pstate->state = BM_FINISHED;
-	SpinLockRelease(&pstate->mutex);
+	pg_atomic_write_membarrier_u32(&pstate->state, BM_FINISHED);
 	ConditionVariableBroadcast(&pstate->cv);
 }
 
@@ -476,15 +472,12 @@ ExecInitBitmapHeapScan(BitmapHeapScan *node, EState *estate, int eflags)
 static bool
 BitmapShouldInitializeSharedState(ParallelBitmapHeapState *pstate)
 {
-	SharedBitmapState state;
+	uint32		state;
 
 	while (1)
 	{
-		SpinLockAcquire(&pstate->mutex);
-		state = pstate->state;
-		if (pstate->state == BM_INITIAL)
-			pstate->state = BM_INPROGRESS;
-		SpinLockRelease(&pstate->mutex);
+		state = BM_INITIAL;
+		pg_atomic_compare_exchange_u32(&pstate->state, &state, BM_INPROGRESS);
 
 		/* Exit if bitmap is done, or if we're the leader. */
 		if (state != BM_INPROGRESS)
@@ -538,9 +531,7 @@ ExecBitmapHeapInitializeDSM(BitmapHeapScanState *node,
 
 	pstate->tbmiterator = 0;
 
-	/* Initialize the mutex */
-	SpinLockInit(&pstate->mutex);
-	pstate->state = BM_INITIAL;
+	pg_atomic_init_u32(&pstate->state, BM_INITIAL);
 
 	ConditionVariableInit(&pstate->cv);
 
@@ -565,7 +556,7 @@ ExecBitmapHeapReInitializeDSM(BitmapHeapScanState *node,
 	if (dsa == NULL)
 		return;
 
-	pstate->state = BM_INITIAL;
+	pg_atomic_write_u32(&pstate->state, BM_INITIAL);
 
 	if (DsaPointerIsValid(pstate->tbmiterator))
 		tbm_free_shared_area(dsa, pstate->tbmiterator);
-- 
2.50.1 (Apple Git-155)


--Xf36GNcW+0xZNily
Content-Type: text/plain; charset=us-ascii
Content-Disposition: attachment;
	filename=v2-0003-convert-FixedParallelState-last_xlog_end-to-an-at.patch



^ permalink  raw  reply  [nested|flat] 440+ messages in thread

* [PATCH v1 2/8] convert ParallelBitmapHeapState->state to an atomic
@ 2026-07-09 18:38 Nathan Bossart <nathan@postgresql.org>
  0 siblings, 0 replies; 440+ messages in thread

From: Nathan Bossart @ 2026-07-09 18:38 UTC (permalink / raw)

---
 src/backend/executor/nodeBitmapHeapscan.c | 21 ++++++---------------
 1 file changed, 6 insertions(+), 15 deletions(-)

diff --git a/src/backend/executor/nodeBitmapHeapscan.c b/src/backend/executor/nodeBitmapHeapscan.c
index 83d6478bc2b..f2bb487bf10 100644
--- a/src/backend/executor/nodeBitmapHeapscan.c
+++ b/src/backend/executor/nodeBitmapHeapscan.c
@@ -79,7 +79,6 @@ typedef enum
 /* ----------------
  *	 ParallelBitmapHeapState information
  *		tbmiterator				iterator for scanning current pages
- *		mutex					mutual exclusion for state
  *		state					current state of the TIDBitmap
  *		cv						conditional wait variable
  * ----------------
@@ -87,8 +86,7 @@ typedef enum
 typedef struct ParallelBitmapHeapState
 {
 	dsa_pointer tbmiterator;
-	slock_t		mutex;
-	SharedBitmapState state;
+	pg_atomic_uint32 state;
 	ConditionVariable cv;
 } ParallelBitmapHeapState;
 
@@ -228,9 +226,7 @@ BitmapHeapNext(BitmapHeapScanState *node)
 static inline void
 BitmapDoneInitializingSharedState(ParallelBitmapHeapState *pstate)
 {
-	SpinLockAcquire(&pstate->mutex);
-	pstate->state = BM_FINISHED;
-	SpinLockRelease(&pstate->mutex);
+	pg_atomic_write_membarrier_u32(&pstate->state, BM_FINISHED);
 	ConditionVariableBroadcast(&pstate->cv);
 }
 
@@ -480,11 +476,8 @@ BitmapShouldInitializeSharedState(ParallelBitmapHeapState *pstate)
 
 	while (1)
 	{
-		SpinLockAcquire(&pstate->mutex);
-		state = pstate->state;
-		if (pstate->state == BM_INITIAL)
-			pstate->state = BM_INPROGRESS;
-		SpinLockRelease(&pstate->mutex);
+		state = BM_INITIAL;
+		pg_atomic_compare_exchange_u32(&pstate->state, &state, BM_INPROGRESS);
 
 		/* Exit if bitmap is done, or if we're the leader. */
 		if (state != BM_INPROGRESS)
@@ -538,9 +531,7 @@ ExecBitmapHeapInitializeDSM(BitmapHeapScanState *node,
 
 	pstate->tbmiterator = 0;
 
-	/* Initialize the mutex */
-	SpinLockInit(&pstate->mutex);
-	pstate->state = BM_INITIAL;
+	pg_atomic_init_u32(&pstate->state, BM_INITIAL);
 
 	ConditionVariableInit(&pstate->cv);
 
@@ -565,7 +556,7 @@ ExecBitmapHeapReInitializeDSM(BitmapHeapScanState *node,
 	if (dsa == NULL)
 		return;
 
-	pstate->state = BM_INITIAL;
+	pg_atomic_write_u32(&pstate->state, BM_INITIAL);
 
 	if (DsaPointerIsValid(pstate->tbmiterator))
 		tbm_free_shared_area(dsa, pstate->tbmiterator);
-- 
2.50.1 (Apple Git-155)


--Ot5x3ffkWEuxilWO
Content-Type: text/plain; charset=us-ascii
Content-Disposition: attachment;
	filename=v1-0003-convert-FixedParallelState-last_xlog_end-to-an-at.patch



^ permalink  raw  reply  [nested|flat] 440+ messages in thread

* [PATCH v1 2/8] convert ParallelBitmapHeapState->state to an atomic
@ 2026-07-09 18:38 Nathan Bossart <nathan@postgresql.org>
  0 siblings, 0 replies; 440+ messages in thread

From: Nathan Bossart @ 2026-07-09 18:38 UTC (permalink / raw)

---
 src/backend/executor/nodeBitmapHeapscan.c | 21 ++++++---------------
 1 file changed, 6 insertions(+), 15 deletions(-)

diff --git a/src/backend/executor/nodeBitmapHeapscan.c b/src/backend/executor/nodeBitmapHeapscan.c
index 83d6478bc2b..f2bb487bf10 100644
--- a/src/backend/executor/nodeBitmapHeapscan.c
+++ b/src/backend/executor/nodeBitmapHeapscan.c
@@ -79,7 +79,6 @@ typedef enum
 /* ----------------
  *	 ParallelBitmapHeapState information
  *		tbmiterator				iterator for scanning current pages
- *		mutex					mutual exclusion for state
  *		state					current state of the TIDBitmap
  *		cv						conditional wait variable
  * ----------------
@@ -87,8 +86,7 @@ typedef enum
 typedef struct ParallelBitmapHeapState
 {
 	dsa_pointer tbmiterator;
-	slock_t		mutex;
-	SharedBitmapState state;
+	pg_atomic_uint32 state;
 	ConditionVariable cv;
 } ParallelBitmapHeapState;
 
@@ -228,9 +226,7 @@ BitmapHeapNext(BitmapHeapScanState *node)
 static inline void
 BitmapDoneInitializingSharedState(ParallelBitmapHeapState *pstate)
 {
-	SpinLockAcquire(&pstate->mutex);
-	pstate->state = BM_FINISHED;
-	SpinLockRelease(&pstate->mutex);
+	pg_atomic_write_membarrier_u32(&pstate->state, BM_FINISHED);
 	ConditionVariableBroadcast(&pstate->cv);
 }
 
@@ -480,11 +476,8 @@ BitmapShouldInitializeSharedState(ParallelBitmapHeapState *pstate)
 
 	while (1)
 	{
-		SpinLockAcquire(&pstate->mutex);
-		state = pstate->state;
-		if (pstate->state == BM_INITIAL)
-			pstate->state = BM_INPROGRESS;
-		SpinLockRelease(&pstate->mutex);
+		state = BM_INITIAL;
+		pg_atomic_compare_exchange_u32(&pstate->state, &state, BM_INPROGRESS);
 
 		/* Exit if bitmap is done, or if we're the leader. */
 		if (state != BM_INPROGRESS)
@@ -538,9 +531,7 @@ ExecBitmapHeapInitializeDSM(BitmapHeapScanState *node,
 
 	pstate->tbmiterator = 0;
 
-	/* Initialize the mutex */
-	SpinLockInit(&pstate->mutex);
-	pstate->state = BM_INITIAL;
+	pg_atomic_init_u32(&pstate->state, BM_INITIAL);
 
 	ConditionVariableInit(&pstate->cv);
 
@@ -565,7 +556,7 @@ ExecBitmapHeapReInitializeDSM(BitmapHeapScanState *node,
 	if (dsa == NULL)
 		return;
 
-	pstate->state = BM_INITIAL;
+	pg_atomic_write_u32(&pstate->state, BM_INITIAL);
 
 	if (DsaPointerIsValid(pstate->tbmiterator))
 		tbm_free_shared_area(dsa, pstate->tbmiterator);
-- 
2.50.1 (Apple Git-155)


--Ot5x3ffkWEuxilWO
Content-Type: text/plain; charset=us-ascii
Content-Disposition: attachment;
	filename=v1-0003-convert-FixedParallelState-last_xlog_end-to-an-at.patch



^ permalink  raw  reply  [nested|flat] 440+ messages in thread

* [PATCH v1 2/8] convert ParallelBitmapHeapState->state to an atomic
@ 2026-07-09 18:38 Nathan Bossart <nathan@postgresql.org>
  0 siblings, 0 replies; 440+ messages in thread

From: Nathan Bossart @ 2026-07-09 18:38 UTC (permalink / raw)

---
 src/backend/executor/nodeBitmapHeapscan.c | 21 ++++++---------------
 1 file changed, 6 insertions(+), 15 deletions(-)

diff --git a/src/backend/executor/nodeBitmapHeapscan.c b/src/backend/executor/nodeBitmapHeapscan.c
index 83d6478bc2b..f2bb487bf10 100644
--- a/src/backend/executor/nodeBitmapHeapscan.c
+++ b/src/backend/executor/nodeBitmapHeapscan.c
@@ -79,7 +79,6 @@ typedef enum
 /* ----------------
  *	 ParallelBitmapHeapState information
  *		tbmiterator				iterator for scanning current pages
- *		mutex					mutual exclusion for state
  *		state					current state of the TIDBitmap
  *		cv						conditional wait variable
  * ----------------
@@ -87,8 +86,7 @@ typedef enum
 typedef struct ParallelBitmapHeapState
 {
 	dsa_pointer tbmiterator;
-	slock_t		mutex;
-	SharedBitmapState state;
+	pg_atomic_uint32 state;
 	ConditionVariable cv;
 } ParallelBitmapHeapState;
 
@@ -228,9 +226,7 @@ BitmapHeapNext(BitmapHeapScanState *node)
 static inline void
 BitmapDoneInitializingSharedState(ParallelBitmapHeapState *pstate)
 {
-	SpinLockAcquire(&pstate->mutex);
-	pstate->state = BM_FINISHED;
-	SpinLockRelease(&pstate->mutex);
+	pg_atomic_write_membarrier_u32(&pstate->state, BM_FINISHED);
 	ConditionVariableBroadcast(&pstate->cv);
 }
 
@@ -480,11 +476,8 @@ BitmapShouldInitializeSharedState(ParallelBitmapHeapState *pstate)
 
 	while (1)
 	{
-		SpinLockAcquire(&pstate->mutex);
-		state = pstate->state;
-		if (pstate->state == BM_INITIAL)
-			pstate->state = BM_INPROGRESS;
-		SpinLockRelease(&pstate->mutex);
+		state = BM_INITIAL;
+		pg_atomic_compare_exchange_u32(&pstate->state, &state, BM_INPROGRESS);
 
 		/* Exit if bitmap is done, or if we're the leader. */
 		if (state != BM_INPROGRESS)
@@ -538,9 +531,7 @@ ExecBitmapHeapInitializeDSM(BitmapHeapScanState *node,
 
 	pstate->tbmiterator = 0;
 
-	/* Initialize the mutex */
-	SpinLockInit(&pstate->mutex);
-	pstate->state = BM_INITIAL;
+	pg_atomic_init_u32(&pstate->state, BM_INITIAL);
 
 	ConditionVariableInit(&pstate->cv);
 
@@ -565,7 +556,7 @@ ExecBitmapHeapReInitializeDSM(BitmapHeapScanState *node,
 	if (dsa == NULL)
 		return;
 
-	pstate->state = BM_INITIAL;
+	pg_atomic_write_u32(&pstate->state, BM_INITIAL);
 
 	if (DsaPointerIsValid(pstate->tbmiterator))
 		tbm_free_shared_area(dsa, pstate->tbmiterator);
-- 
2.50.1 (Apple Git-155)


--Ot5x3ffkWEuxilWO
Content-Type: text/plain; charset=us-ascii
Content-Disposition: attachment;
	filename=v1-0003-convert-FixedParallelState-last_xlog_end-to-an-at.patch



^ permalink  raw  reply  [nested|flat] 440+ messages in thread

* [PATCH v2 2/9] convert ParallelBitmapHeapState->state to an atomic
@ 2026-07-09 18:38 Nathan Bossart <nathan@postgresql.org>
  0 siblings, 0 replies; 440+ messages in thread

From: Nathan Bossart @ 2026-07-09 18:38 UTC (permalink / raw)

---
 src/backend/executor/nodeBitmapHeapscan.c | 23 +++++++----------------
 1 file changed, 7 insertions(+), 16 deletions(-)

diff --git a/src/backend/executor/nodeBitmapHeapscan.c b/src/backend/executor/nodeBitmapHeapscan.c
index 83d6478bc2b..a9e83f30687 100644
--- a/src/backend/executor/nodeBitmapHeapscan.c
+++ b/src/backend/executor/nodeBitmapHeapscan.c
@@ -79,7 +79,6 @@ typedef enum
 /* ----------------
  *	 ParallelBitmapHeapState information
  *		tbmiterator				iterator for scanning current pages
- *		mutex					mutual exclusion for state
  *		state					current state of the TIDBitmap
  *		cv						conditional wait variable
  * ----------------
@@ -87,8 +86,7 @@ typedef enum
 typedef struct ParallelBitmapHeapState
 {
 	dsa_pointer tbmiterator;
-	slock_t		mutex;
-	SharedBitmapState state;
+	pg_atomic_uint32 state;
 	ConditionVariable cv;
 } ParallelBitmapHeapState;
 
@@ -228,9 +226,7 @@ BitmapHeapNext(BitmapHeapScanState *node)
 static inline void
 BitmapDoneInitializingSharedState(ParallelBitmapHeapState *pstate)
 {
-	SpinLockAcquire(&pstate->mutex);
-	pstate->state = BM_FINISHED;
-	SpinLockRelease(&pstate->mutex);
+	pg_atomic_write_membarrier_u32(&pstate->state, BM_FINISHED);
 	ConditionVariableBroadcast(&pstate->cv);
 }
 
@@ -476,15 +472,12 @@ ExecInitBitmapHeapScan(BitmapHeapScan *node, EState *estate, int eflags)
 static bool
 BitmapShouldInitializeSharedState(ParallelBitmapHeapState *pstate)
 {
-	SharedBitmapState state;
+	uint32		state;
 
 	while (1)
 	{
-		SpinLockAcquire(&pstate->mutex);
-		state = pstate->state;
-		if (pstate->state == BM_INITIAL)
-			pstate->state = BM_INPROGRESS;
-		SpinLockRelease(&pstate->mutex);
+		state = BM_INITIAL;
+		pg_atomic_compare_exchange_u32(&pstate->state, &state, BM_INPROGRESS);
 
 		/* Exit if bitmap is done, or if we're the leader. */
 		if (state != BM_INPROGRESS)
@@ -538,9 +531,7 @@ ExecBitmapHeapInitializeDSM(BitmapHeapScanState *node,
 
 	pstate->tbmiterator = 0;
 
-	/* Initialize the mutex */
-	SpinLockInit(&pstate->mutex);
-	pstate->state = BM_INITIAL;
+	pg_atomic_init_u32(&pstate->state, BM_INITIAL);
 
 	ConditionVariableInit(&pstate->cv);
 
@@ -565,7 +556,7 @@ ExecBitmapHeapReInitializeDSM(BitmapHeapScanState *node,
 	if (dsa == NULL)
 		return;
 
-	pstate->state = BM_INITIAL;
+	pg_atomic_write_u32(&pstate->state, BM_INITIAL);
 
 	if (DsaPointerIsValid(pstate->tbmiterator))
 		tbm_free_shared_area(dsa, pstate->tbmiterator);
-- 
2.50.1 (Apple Git-155)


--Xf36GNcW+0xZNily
Content-Type: text/plain; charset=us-ascii
Content-Disposition: attachment;
	filename=v2-0003-convert-FixedParallelState-last_xlog_end-to-an-at.patch



^ permalink  raw  reply  [nested|flat] 440+ messages in thread

* [PATCH v1 2/8] convert ParallelBitmapHeapState->state to an atomic
@ 2026-07-09 18:38 Nathan Bossart <nathan@postgresql.org>
  0 siblings, 0 replies; 440+ messages in thread

From: Nathan Bossart @ 2026-07-09 18:38 UTC (permalink / raw)

---
 src/backend/executor/nodeBitmapHeapscan.c | 21 ++++++---------------
 1 file changed, 6 insertions(+), 15 deletions(-)

diff --git a/src/backend/executor/nodeBitmapHeapscan.c b/src/backend/executor/nodeBitmapHeapscan.c
index 83d6478bc2b..f2bb487bf10 100644
--- a/src/backend/executor/nodeBitmapHeapscan.c
+++ b/src/backend/executor/nodeBitmapHeapscan.c
@@ -79,7 +79,6 @@ typedef enum
 /* ----------------
  *	 ParallelBitmapHeapState information
  *		tbmiterator				iterator for scanning current pages
- *		mutex					mutual exclusion for state
  *		state					current state of the TIDBitmap
  *		cv						conditional wait variable
  * ----------------
@@ -87,8 +86,7 @@ typedef enum
 typedef struct ParallelBitmapHeapState
 {
 	dsa_pointer tbmiterator;
-	slock_t		mutex;
-	SharedBitmapState state;
+	pg_atomic_uint32 state;
 	ConditionVariable cv;
 } ParallelBitmapHeapState;
 
@@ -228,9 +226,7 @@ BitmapHeapNext(BitmapHeapScanState *node)
 static inline void
 BitmapDoneInitializingSharedState(ParallelBitmapHeapState *pstate)
 {
-	SpinLockAcquire(&pstate->mutex);
-	pstate->state = BM_FINISHED;
-	SpinLockRelease(&pstate->mutex);
+	pg_atomic_write_membarrier_u32(&pstate->state, BM_FINISHED);
 	ConditionVariableBroadcast(&pstate->cv);
 }
 
@@ -480,11 +476,8 @@ BitmapShouldInitializeSharedState(ParallelBitmapHeapState *pstate)
 
 	while (1)
 	{
-		SpinLockAcquire(&pstate->mutex);
-		state = pstate->state;
-		if (pstate->state == BM_INITIAL)
-			pstate->state = BM_INPROGRESS;
-		SpinLockRelease(&pstate->mutex);
+		state = BM_INITIAL;
+		pg_atomic_compare_exchange_u32(&pstate->state, &state, BM_INPROGRESS);
 
 		/* Exit if bitmap is done, or if we're the leader. */
 		if (state != BM_INPROGRESS)
@@ -538,9 +531,7 @@ ExecBitmapHeapInitializeDSM(BitmapHeapScanState *node,
 
 	pstate->tbmiterator = 0;
 
-	/* Initialize the mutex */
-	SpinLockInit(&pstate->mutex);
-	pstate->state = BM_INITIAL;
+	pg_atomic_init_u32(&pstate->state, BM_INITIAL);
 
 	ConditionVariableInit(&pstate->cv);
 
@@ -565,7 +556,7 @@ ExecBitmapHeapReInitializeDSM(BitmapHeapScanState *node,
 	if (dsa == NULL)
 		return;
 
-	pstate->state = BM_INITIAL;
+	pg_atomic_write_u32(&pstate->state, BM_INITIAL);
 
 	if (DsaPointerIsValid(pstate->tbmiterator))
 		tbm_free_shared_area(dsa, pstate->tbmiterator);
-- 
2.50.1 (Apple Git-155)


--Ot5x3ffkWEuxilWO
Content-Type: text/plain; charset=us-ascii
Content-Disposition: attachment;
	filename=v1-0003-convert-FixedParallelState-last_xlog_end-to-an-at.patch



^ permalink  raw  reply  [nested|flat] 440+ messages in thread

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Thread overview: 440+ messages (download: mbox mbox.gz follow: Atom feed)
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2026-07-09 18:38 [PATCH v1 2/8] convert ParallelBitmapHeapState->state to an atomic Nathan Bossart <nathan@postgresql.org>
2026-07-09 18:38 [PATCH v1 2/8] convert ParallelBitmapHeapState->state to an atomic Nathan Bossart <nathan@postgresql.org>
2026-07-09 18:38 [PATCH v1 2/8] convert ParallelBitmapHeapState->state to an atomic Nathan Bossart <nathan@postgresql.org>
2026-07-09 18:38 [PATCH v2 2/9] convert ParallelBitmapHeapState->state to an atomic Nathan Bossart <nathan@postgresql.org>
2026-07-09 18:38 [PATCH v1 2/8] convert ParallelBitmapHeapState->state to an atomic Nathan Bossart <nathan@postgresql.org>
2026-07-09 18:38 [PATCH v1 2/8] convert ParallelBitmapHeapState->state to an atomic Nathan Bossart <nathan@postgresql.org>
2026-07-09 18:38 [PATCH v1 2/8] convert ParallelBitmapHeapState->state to an atomic Nathan Bossart <nathan@postgresql.org>
2026-07-09 18:38 [PATCH v1 2/8] convert ParallelBitmapHeapState->state to an atomic Nathan Bossart <nathan@postgresql.org>
2026-07-09 18:38 [PATCH v1 2/8] convert ParallelBitmapHeapState->state to an atomic Nathan Bossart <nathan@postgresql.org>
2026-07-09 18:38 [PATCH v1 2/8] convert ParallelBitmapHeapState->state to an atomic Nathan Bossart <nathan@postgresql.org>
2026-07-09 18:38 [PATCH v2 2/9] convert ParallelBitmapHeapState->state to an atomic Nathan Bossart <nathan@postgresql.org>
2026-07-09 18:38 [PATCH v1 2/8] convert ParallelBitmapHeapState->state to an atomic Nathan Bossart <nathan@postgresql.org>
2026-07-09 18:38 [PATCH v1 2/8] convert ParallelBitmapHeapState->state to an atomic Nathan Bossart <nathan@postgresql.org>
2026-07-09 18:38 [PATCH v1 2/8] convert ParallelBitmapHeapState->state to an atomic Nathan Bossart <nathan@postgresql.org>
2026-07-09 18:38 [PATCH v2 2/9] convert ParallelBitmapHeapState->state to an atomic Nathan Bossart <nathan@postgresql.org>
2026-07-09 18:38 [PATCH v2 2/9] convert ParallelBitmapHeapState->state to an atomic Nathan Bossart <nathan@postgresql.org>
2026-07-09 18:38 [PATCH v2 2/9] convert ParallelBitmapHeapState->state to an atomic Nathan Bossart <nathan@postgresql.org>
2026-07-09 18:38 [PATCH v1 2/8] convert ParallelBitmapHeapState->state to an atomic Nathan Bossart <nathan@postgresql.org>
2026-07-09 18:38 [PATCH v1 2/8] convert ParallelBitmapHeapState->state to an atomic Nathan Bossart <nathan@postgresql.org>
2026-07-09 18:38 [PATCH v1 2/8] convert ParallelBitmapHeapState->state to an atomic Nathan Bossart <nathan@postgresql.org>
2026-07-09 18:38 [PATCH v1 2/8] convert ParallelBitmapHeapState->state to an atomic Nathan Bossart <nathan@postgresql.org>
2026-07-09 18:38 [PATCH v1 2/8] convert ParallelBitmapHeapState->state to an atomic Nathan Bossart <nathan@postgresql.org>
2026-07-09 18:38 [PATCH v1 2/8] convert ParallelBitmapHeapState->state to an atomic Nathan Bossart <nathan@postgresql.org>
2026-07-09 18:38 [PATCH v1 2/8] convert ParallelBitmapHeapState->state to an atomic Nathan Bossart <nathan@postgresql.org>
2026-07-09 18:38 [PATCH v2 2/9] convert ParallelBitmapHeapState->state to an atomic Nathan Bossart <nathan@postgresql.org>
2026-07-09 18:38 [PATCH v2 2/9] convert ParallelBitmapHeapState->state to an atomic Nathan Bossart <nathan@postgresql.org>
2026-07-09 18:38 [PATCH v1 2/8] convert ParallelBitmapHeapState->state to an atomic Nathan Bossart <nathan@postgresql.org>
2026-07-09 18:38 [PATCH v1 2/8] convert ParallelBitmapHeapState->state to an atomic Nathan Bossart <nathan@postgresql.org>
2026-07-09 18:38 [PATCH v1 2/8] convert ParallelBitmapHeapState->state to an atomic Nathan Bossart <nathan@postgresql.org>
2026-07-09 18:38 [PATCH v1 2/8] convert ParallelBitmapHeapState->state to an atomic Nathan Bossart <nathan@postgresql.org>
2026-07-09 18:38 [PATCH v1 2/8] convert ParallelBitmapHeapState->state to an atomic Nathan Bossart <nathan@postgresql.org>
2026-07-09 18:38 [PATCH v1 2/8] convert ParallelBitmapHeapState->state to an atomic Nathan Bossart <nathan@postgresql.org>
2026-07-09 18:38 [PATCH v1 2/8] convert ParallelBitmapHeapState->state to an atomic Nathan Bossart <nathan@postgresql.org>
2026-07-09 18:38 [PATCH v1 2/8] convert ParallelBitmapHeapState->state to an atomic Nathan Bossart <nathan@postgresql.org>
2026-07-09 18:38 [PATCH v1 2/8] convert ParallelBitmapHeapState->state to an atomic Nathan Bossart <nathan@postgresql.org>
2026-07-09 18:38 [PATCH v1 2/8] convert ParallelBitmapHeapState->state to an atomic Nathan Bossart <nathan@postgresql.org>
2026-07-09 18:38 [PATCH v1 2/8] convert ParallelBitmapHeapState->state to an atomic Nathan Bossart <nathan@postgresql.org>
2026-07-09 18:38 [PATCH v1 2/8] convert ParallelBitmapHeapState->state to an atomic Nathan Bossart <nathan@postgresql.org>
2026-07-09 18:38 [PATCH v1 2/8] convert ParallelBitmapHeapState->state to an atomic Nathan Bossart <nathan@postgresql.org>
2026-07-09 18:38 [PATCH v2 2/9] convert ParallelBitmapHeapState->state to an atomic Nathan Bossart <nathan@postgresql.org>
2026-07-09 18:38 [PATCH v2 2/9] convert ParallelBitmapHeapState->state to an atomic Nathan Bossart <nathan@postgresql.org>
2026-07-09 18:38 [PATCH v1 2/8] convert ParallelBitmapHeapState->state to an atomic Nathan Bossart <nathan@postgresql.org>
2026-07-09 18:38 [PATCH v1 2/8] convert ParallelBitmapHeapState->state to an atomic Nathan Bossart <nathan@postgresql.org>
2026-07-09 18:38 [PATCH v1 2/8] convert ParallelBitmapHeapState->state to an atomic Nathan Bossart <nathan@postgresql.org>
2026-07-09 18:38 [PATCH v1 2/8] convert ParallelBitmapHeapState->state to an atomic Nathan Bossart <nathan@postgresql.org>
2026-07-09 18:38 [PATCH v1 2/8] convert ParallelBitmapHeapState->state to an atomic Nathan Bossart <nathan@postgresql.org>
2026-07-09 18:38 [PATCH v1 2/8] convert ParallelBitmapHeapState->state to an atomic Nathan Bossart <nathan@postgresql.org>
2026-07-09 18:38 [PATCH v1 2/8] convert ParallelBitmapHeapState->state to an atomic Nathan Bossart <nathan@postgresql.org>
2026-07-09 18:38 [PATCH v1 2/8] convert ParallelBitmapHeapState->state to an atomic Nathan Bossart <nathan@postgresql.org>
2026-07-09 18:38 [PATCH v1 2/8] convert ParallelBitmapHeapState->state to an atomic Nathan Bossart <nathan@postgresql.org>
2026-07-09 18:38 [PATCH v1 2/8] convert ParallelBitmapHeapState->state to an atomic Nathan Bossart <nathan@postgresql.org>
2026-07-09 18:38 [PATCH v2 2/9] convert ParallelBitmapHeapState->state to an atomic Nathan Bossart <nathan@postgresql.org>
2026-07-09 18:38 [PATCH v2 2/9] convert ParallelBitmapHeapState->state to an atomic Nathan Bossart <nathan@postgresql.org>
2026-07-09 18:38 [PATCH v2 2/9] convert ParallelBitmapHeapState->state to an atomic Nathan Bossart <nathan@postgresql.org>
2026-07-09 18:38 [PATCH v2 2/9] convert ParallelBitmapHeapState->state to an atomic Nathan Bossart <nathan@postgresql.org>
2026-07-09 18:38 [PATCH v2 2/9] convert ParallelBitmapHeapState->state to an atomic Nathan Bossart <nathan@postgresql.org>
2026-07-09 18:38 [PATCH v1 2/8] convert ParallelBitmapHeapState->state to an atomic Nathan Bossart <nathan@postgresql.org>
2026-07-09 18:38 [PATCH v1 2/8] convert ParallelBitmapHeapState->state to an atomic Nathan Bossart <nathan@postgresql.org>
2026-07-09 18:38 [PATCH v1 2/8] convert ParallelBitmapHeapState->state to an atomic Nathan Bossart <nathan@postgresql.org>
2026-07-09 18:38 [PATCH v1 2/8] convert ParallelBitmapHeapState->state to an atomic Nathan Bossart <nathan@postgresql.org>
2026-07-09 18:38 [PATCH v2 2/9] convert ParallelBitmapHeapState->state to an atomic Nathan Bossart <nathan@postgresql.org>
2026-07-09 18:38 [PATCH v1 2/8] convert ParallelBitmapHeapState->state to an atomic Nathan Bossart <nathan@postgresql.org>
2026-07-09 18:38 [PATCH v1 2/8] convert ParallelBitmapHeapState->state to an atomic Nathan Bossart <nathan@postgresql.org>
2026-07-09 18:38 [PATCH v1 2/8] convert ParallelBitmapHeapState->state to an atomic Nathan Bossart <nathan@postgresql.org>
2026-07-09 18:38 [PATCH v1 2/8] convert ParallelBitmapHeapState->state to an atomic Nathan Bossart <nathan@postgresql.org>
2026-07-09 18:38 [PATCH v1 2/8] convert ParallelBitmapHeapState->state to an atomic Nathan Bossart <nathan@postgresql.org>
2026-07-09 18:38 [PATCH v1 2/8] convert ParallelBitmapHeapState->state to an atomic Nathan Bossart <nathan@postgresql.org>
2026-07-09 18:38 [PATCH v1 2/8] convert ParallelBitmapHeapState->state to an atomic Nathan Bossart <nathan@postgresql.org>
2026-07-09 18:38 [PATCH v1 2/8] convert ParallelBitmapHeapState->state to an atomic Nathan Bossart <nathan@postgresql.org>
2026-07-09 18:38 [PATCH v1 2/8] convert ParallelBitmapHeapState->state to an atomic Nathan Bossart <nathan@postgresql.org>
2026-07-09 18:38 [PATCH v1 2/8] convert ParallelBitmapHeapState->state to an atomic Nathan Bossart <nathan@postgresql.org>
2026-07-09 18:38 [PATCH v1 2/8] convert ParallelBitmapHeapState->state to an atomic Nathan Bossart <nathan@postgresql.org>
2026-07-09 18:38 [PATCH v2 2/9] convert ParallelBitmapHeapState->state to an atomic Nathan Bossart <nathan@postgresql.org>
2026-07-09 18:38 [PATCH v1 2/8] convert ParallelBitmapHeapState->state to an atomic Nathan Bossart <nathan@postgresql.org>
2026-07-09 18:38 [PATCH v2 2/9] convert ParallelBitmapHeapState->state to an atomic Nathan Bossart <nathan@postgresql.org>
2026-07-09 18:38 [PATCH v2 2/9] convert ParallelBitmapHeapState->state to an atomic Nathan Bossart <nathan@postgresql.org>
2026-07-09 18:38 [PATCH v2 2/9] convert ParallelBitmapHeapState->state to an atomic Nathan Bossart <nathan@postgresql.org>
2026-07-09 18:38 [PATCH v1 2/8] convert ParallelBitmapHeapState->state to an atomic Nathan Bossart <nathan@postgresql.org>
2026-07-09 18:38 [PATCH v1 2/8] convert ParallelBitmapHeapState->state to an atomic Nathan Bossart <nathan@postgresql.org>
2026-07-09 18:38 [PATCH v1 2/8] convert ParallelBitmapHeapState->state to an atomic Nathan Bossart <nathan@postgresql.org>
2026-07-09 18:38 [PATCH v1 2/8] convert ParallelBitmapHeapState->state to an atomic Nathan Bossart <nathan@postgresql.org>
2026-07-09 18:38 [PATCH v1 2/8] convert ParallelBitmapHeapState->state to an atomic Nathan Bossart <nathan@postgresql.org>
2026-07-09 18:38 [PATCH v1 2/8] convert ParallelBitmapHeapState->state to an atomic Nathan Bossart <nathan@postgresql.org>
2026-07-09 18:38 [PATCH v2 2/9] convert ParallelBitmapHeapState->state to an atomic Nathan Bossart <nathan@postgresql.org>
2026-07-09 18:38 [PATCH v1 2/8] convert ParallelBitmapHeapState->state to an atomic Nathan Bossart <nathan@postgresql.org>
2026-07-09 18:38 [PATCH v1 2/8] convert ParallelBitmapHeapState->state to an atomic Nathan Bossart <nathan@postgresql.org>
2026-07-09 18:38 [PATCH v1 2/8] convert ParallelBitmapHeapState->state to an atomic Nathan Bossart <nathan@postgresql.org>
2026-07-09 18:38 [PATCH v2 2/9] convert ParallelBitmapHeapState->state to an atomic Nathan Bossart <nathan@postgresql.org>
2026-07-09 18:38 [PATCH v2 2/9] convert ParallelBitmapHeapState->state to an atomic Nathan Bossart <nathan@postgresql.org>
2026-07-09 18:38 [PATCH v2 2/9] convert ParallelBitmapHeapState->state to an atomic Nathan Bossart <nathan@postgresql.org>
2026-07-09 18:38 [PATCH v2 2/9] convert ParallelBitmapHeapState->state to an atomic Nathan Bossart <nathan@postgresql.org>
2026-07-09 18:38 [PATCH v2 2/9] convert ParallelBitmapHeapState->state to an atomic Nathan Bossart <nathan@postgresql.org>
2026-07-09 18:38 [PATCH v1 2/8] convert ParallelBitmapHeapState->state to an atomic Nathan Bossart <nathan@postgresql.org>
2026-07-09 18:38 [PATCH v1 2/8] convert ParallelBitmapHeapState->state to an atomic Nathan Bossart <nathan@postgresql.org>
2026-07-09 18:38 [PATCH v1 2/8] convert ParallelBitmapHeapState->state to an atomic Nathan Bossart <nathan@postgresql.org>
2026-07-09 18:38 [PATCH v2 2/9] convert ParallelBitmapHeapState->state to an atomic Nathan Bossart <nathan@postgresql.org>
2026-07-09 18:38 [PATCH v2 2/9] convert ParallelBitmapHeapState->state to an atomic Nathan Bossart <nathan@postgresql.org>
2026-07-09 18:38 [PATCH v1 2/8] convert ParallelBitmapHeapState->state to an atomic Nathan Bossart <nathan@postgresql.org>
2026-07-09 18:38 [PATCH v1 2/8] convert ParallelBitmapHeapState->state to an atomic Nathan Bossart <nathan@postgresql.org>
2026-07-09 18:38 [PATCH v1 2/8] convert ParallelBitmapHeapState->state to an atomic Nathan Bossart <nathan@postgresql.org>
2026-07-09 18:38 [PATCH v2 2/9] convert ParallelBitmapHeapState->state to an atomic Nathan Bossart <nathan@postgresql.org>
2026-07-09 18:38 [PATCH v1 2/8] convert ParallelBitmapHeapState->state to an atomic Nathan Bossart <nathan@postgresql.org>
2026-07-09 18:38 [PATCH v1 2/8] convert ParallelBitmapHeapState->state to an atomic Nathan Bossart <nathan@postgresql.org>
2026-07-09 18:38 [PATCH v2 2/9] convert ParallelBitmapHeapState->state to an atomic Nathan Bossart <nathan@postgresql.org>
2026-07-09 18:38 [PATCH v2 2/9] convert ParallelBitmapHeapState->state to an atomic Nathan Bossart <nathan@postgresql.org>
2026-07-09 18:38 [PATCH v1 2/8] convert ParallelBitmapHeapState->state to an atomic Nathan Bossart <nathan@postgresql.org>
2026-07-09 18:38 [PATCH v2 2/9] convert ParallelBitmapHeapState->state to an atomic Nathan Bossart <nathan@postgresql.org>
2026-07-09 18:38 [PATCH v2 2/9] convert ParallelBitmapHeapState->state to an atomic Nathan Bossart <nathan@postgresql.org>
2026-07-09 18:38 [PATCH v1 2/8] convert ParallelBitmapHeapState->state to an atomic Nathan Bossart <nathan@postgresql.org>
2026-07-09 18:38 [PATCH v1 2/8] convert ParallelBitmapHeapState->state to an atomic Nathan Bossart <nathan@postgresql.org>
2026-07-09 18:38 [PATCH v2 2/9] convert ParallelBitmapHeapState->state to an atomic Nathan Bossart <nathan@postgresql.org>
2026-07-09 18:38 [PATCH v1 2/8] convert ParallelBitmapHeapState->state to an atomic Nathan Bossart <nathan@postgresql.org>
2026-07-09 18:38 [PATCH v1 2/8] convert ParallelBitmapHeapState->state to an atomic Nathan Bossart <nathan@postgresql.org>
2026-07-09 18:38 [PATCH v1 2/8] convert ParallelBitmapHeapState->state to an atomic Nathan Bossart <nathan@postgresql.org>
2026-07-09 18:38 [PATCH v1 2/8] convert ParallelBitmapHeapState->state to an atomic Nathan Bossart <nathan@postgresql.org>
2026-07-09 18:38 [PATCH v1 2/8] convert ParallelBitmapHeapState->state to an atomic Nathan Bossart <nathan@postgresql.org>
2026-07-09 18:38 [PATCH v1 2/8] convert ParallelBitmapHeapState->state to an atomic Nathan Bossart <nathan@postgresql.org>
2026-07-09 18:38 [PATCH v1 2/8] convert ParallelBitmapHeapState->state to an atomic Nathan Bossart <nathan@postgresql.org>
2026-07-09 18:38 [PATCH v1 2/8] convert ParallelBitmapHeapState->state to an atomic Nathan Bossart <nathan@postgresql.org>
2026-07-09 18:38 [PATCH v1 2/8] convert ParallelBitmapHeapState->state to an atomic Nathan Bossart <nathan@postgresql.org>
2026-07-09 18:38 [PATCH v1 2/8] convert ParallelBitmapHeapState->state to an atomic Nathan Bossart <nathan@postgresql.org>
2026-07-09 18:38 [PATCH v2 2/9] convert ParallelBitmapHeapState->state to an atomic Nathan Bossart <nathan@postgresql.org>
2026-07-09 18:38 [PATCH v1 2/8] convert ParallelBitmapHeapState->state to an atomic Nathan Bossart <nathan@postgresql.org>
2026-07-09 18:38 [PATCH v1 2/8] convert ParallelBitmapHeapState->state to an atomic Nathan Bossart <nathan@postgresql.org>
2026-07-09 18:38 [PATCH v2 2/9] convert ParallelBitmapHeapState->state to an atomic Nathan Bossart <nathan@postgresql.org>
2026-07-09 18:38 [PATCH v1 2/8] convert ParallelBitmapHeapState->state to an atomic Nathan Bossart <nathan@postgresql.org>
2026-07-09 18:38 [PATCH v1 2/8] convert ParallelBitmapHeapState->state to an atomic Nathan Bossart <nathan@postgresql.org>
2026-07-09 18:38 [PATCH v1 2/8] convert ParallelBitmapHeapState->state to an atomic Nathan Bossart <nathan@postgresql.org>
2026-07-09 18:38 [PATCH v1 2/8] convert ParallelBitmapHeapState->state to an atomic Nathan Bossart <nathan@postgresql.org>
2026-07-09 18:38 [PATCH v1 2/8] convert ParallelBitmapHeapState->state to an atomic Nathan Bossart <nathan@postgresql.org>
2026-07-09 18:38 [PATCH v1 2/8] convert ParallelBitmapHeapState->state to an atomic Nathan Bossart <nathan@postgresql.org>
2026-07-09 18:38 [PATCH v1 2/8] convert ParallelBitmapHeapState->state to an atomic Nathan Bossart <nathan@postgresql.org>
2026-07-09 18:38 [PATCH v1 2/8] convert ParallelBitmapHeapState->state to an atomic Nathan Bossart <nathan@postgresql.org>
2026-07-09 18:38 [PATCH v1 2/8] convert ParallelBitmapHeapState->state to an atomic Nathan Bossart <nathan@postgresql.org>
2026-07-09 18:38 [PATCH v1 2/8] convert ParallelBitmapHeapState->state to an atomic Nathan Bossart <nathan@postgresql.org>
2026-07-09 18:38 [PATCH v1 2/8] convert ParallelBitmapHeapState->state to an atomic Nathan Bossart <nathan@postgresql.org>
2026-07-09 18:38 [PATCH v1 2/8] convert ParallelBitmapHeapState->state to an atomic Nathan Bossart <nathan@postgresql.org>
2026-07-09 18:38 [PATCH v2 2/9] convert ParallelBitmapHeapState->state to an atomic Nathan Bossart <nathan@postgresql.org>
2026-07-09 18:38 [PATCH v1 2/8] convert ParallelBitmapHeapState->state to an atomic Nathan Bossart <nathan@postgresql.org>
2026-07-09 18:38 [PATCH v1 2/8] convert ParallelBitmapHeapState->state to an atomic Nathan Bossart <nathan@postgresql.org>
2026-07-09 18:38 [PATCH v1 2/8] convert ParallelBitmapHeapState->state to an atomic Nathan Bossart <nathan@postgresql.org>
2026-07-09 18:38 [PATCH v1 2/8] convert ParallelBitmapHeapState->state to an atomic Nathan Bossart <nathan@postgresql.org>
2026-07-09 18:38 [PATCH v1 2/8] convert ParallelBitmapHeapState->state to an atomic Nathan Bossart <nathan@postgresql.org>
2026-07-09 18:38 [PATCH v1 2/8] convert ParallelBitmapHeapState->state to an atomic Nathan Bossart <nathan@postgresql.org>
2026-07-09 18:38 [PATCH v1 2/8] convert ParallelBitmapHeapState->state to an atomic Nathan Bossart <nathan@postgresql.org>
2026-07-09 18:38 [PATCH v1 2/8] convert ParallelBitmapHeapState->state to an atomic Nathan Bossart <nathan@postgresql.org>
2026-07-09 18:38 [PATCH v1 2/8] convert ParallelBitmapHeapState->state to an atomic Nathan Bossart <nathan@postgresql.org>
2026-07-09 18:38 [PATCH v2 2/9] convert ParallelBitmapHeapState->state to an atomic Nathan Bossart <nathan@postgresql.org>
2026-07-09 18:38 [PATCH v1 2/8] convert ParallelBitmapHeapState->state to an atomic Nathan Bossart <nathan@postgresql.org>
2026-07-09 18:38 [PATCH v1 2/8] convert ParallelBitmapHeapState->state to an atomic Nathan Bossart <nathan@postgresql.org>
2026-07-09 18:38 [PATCH v1 2/8] convert ParallelBitmapHeapState->state to an atomic Nathan Bossart <nathan@postgresql.org>
2026-07-09 18:38 [PATCH v1 2/8] convert ParallelBitmapHeapState->state to an atomic Nathan Bossart <nathan@postgresql.org>
2026-07-09 18:38 [PATCH v1 2/8] convert ParallelBitmapHeapState->state to an atomic Nathan Bossart <nathan@postgresql.org>
2026-07-09 18:38 [PATCH v1 2/8] convert ParallelBitmapHeapState->state to an atomic Nathan Bossart <nathan@postgresql.org>
2026-07-09 18:38 [PATCH v1 2/8] convert ParallelBitmapHeapState->state to an atomic Nathan Bossart <nathan@postgresql.org>
2026-07-09 18:38 [PATCH v2 2/9] convert ParallelBitmapHeapState->state to an atomic Nathan Bossart <nathan@postgresql.org>
2026-07-09 18:38 [PATCH v2 2/9] convert ParallelBitmapHeapState->state to an atomic Nathan Bossart <nathan@postgresql.org>
2026-07-09 18:38 [PATCH v2 2/9] convert ParallelBitmapHeapState->state to an atomic Nathan Bossart <nathan@postgresql.org>
2026-07-09 18:38 [PATCH v1 2/8] convert ParallelBitmapHeapState->state to an atomic Nathan Bossart <nathan@postgresql.org>
2026-07-09 18:38 [PATCH v1 2/8] convert ParallelBitmapHeapState->state to an atomic Nathan Bossart <nathan@postgresql.org>
2026-07-09 18:38 [PATCH v1 2/8] convert ParallelBitmapHeapState->state to an atomic Nathan Bossart <nathan@postgresql.org>
2026-07-09 18:38 [PATCH v1 2/8] convert ParallelBitmapHeapState->state to an atomic Nathan Bossart <nathan@postgresql.org>
2026-07-09 18:38 [PATCH v1 2/8] convert ParallelBitmapHeapState->state to an atomic Nathan Bossart <nathan@postgresql.org>
2026-07-09 18:38 [PATCH v2 2/9] convert ParallelBitmapHeapState->state to an atomic Nathan Bossart <nathan@postgresql.org>
2026-07-09 18:38 [PATCH v1 2/8] convert ParallelBitmapHeapState->state to an atomic Nathan Bossart <nathan@postgresql.org>
2026-07-09 18:38 [PATCH v1 2/8] convert ParallelBitmapHeapState->state to an atomic Nathan Bossart <nathan@postgresql.org>
2026-07-09 18:38 [PATCH v1 2/8] convert ParallelBitmapHeapState->state to an atomic Nathan Bossart <nathan@postgresql.org>
2026-07-09 18:38 [PATCH v1 2/8] convert ParallelBitmapHeapState->state to an atomic Nathan Bossart <nathan@postgresql.org>
2026-07-09 18:38 [PATCH v2 2/9] convert ParallelBitmapHeapState->state to an atomic Nathan Bossart <nathan@postgresql.org>
2026-07-09 18:38 [PATCH v2 2/9] convert ParallelBitmapHeapState->state to an atomic Nathan Bossart <nathan@postgresql.org>
2026-07-09 18:38 [PATCH v1 2/8] convert ParallelBitmapHeapState->state to an atomic Nathan Bossart <nathan@postgresql.org>
2026-07-09 18:38 [PATCH v1 2/8] convert ParallelBitmapHeapState->state to an atomic Nathan Bossart <nathan@postgresql.org>
2026-07-09 18:38 [PATCH v2 2/9] convert ParallelBitmapHeapState->state to an atomic Nathan Bossart <nathan@postgresql.org>
2026-07-09 18:38 [PATCH v2 2/9] convert ParallelBitmapHeapState->state to an atomic Nathan Bossart <nathan@postgresql.org>
2026-07-09 18:38 [PATCH v1 2/8] convert ParallelBitmapHeapState->state to an atomic Nathan Bossart <nathan@postgresql.org>
2026-07-09 18:38 [PATCH v1 2/8] convert ParallelBitmapHeapState->state to an atomic Nathan Bossart <nathan@postgresql.org>
2026-07-09 18:38 [PATCH v2 2/9] convert ParallelBitmapHeapState->state to an atomic Nathan Bossart <nathan@postgresql.org>
2026-07-09 18:38 [PATCH v1 2/8] convert ParallelBitmapHeapState->state to an atomic Nathan Bossart <nathan@postgresql.org>
2026-07-09 18:38 [PATCH v2 2/9] convert ParallelBitmapHeapState->state to an atomic Nathan Bossart <nathan@postgresql.org>
2026-07-09 18:38 [PATCH v1 2/8] convert ParallelBitmapHeapState->state to an atomic Nathan Bossart <nathan@postgresql.org>
2026-07-09 18:38 [PATCH v1 2/8] convert ParallelBitmapHeapState->state to an atomic Nathan Bossart <nathan@postgresql.org>
2026-07-09 18:38 [PATCH v1 2/8] convert ParallelBitmapHeapState->state to an atomic Nathan Bossart <nathan@postgresql.org>
2026-07-09 18:38 [PATCH v1 2/8] convert ParallelBitmapHeapState->state to an atomic Nathan Bossart <nathan@postgresql.org>
2026-07-09 18:38 [PATCH v1 2/8] convert ParallelBitmapHeapState->state to an atomic Nathan Bossart <nathan@postgresql.org>
2026-07-09 18:38 [PATCH v1 2/8] convert ParallelBitmapHeapState->state to an atomic Nathan Bossart <nathan@postgresql.org>
2026-07-09 18:38 [PATCH v1 2/8] convert ParallelBitmapHeapState->state to an atomic Nathan Bossart <nathan@postgresql.org>
2026-07-09 18:38 [PATCH v1 2/8] convert ParallelBitmapHeapState->state to an atomic Nathan Bossart <nathan@postgresql.org>
2026-07-09 18:38 [PATCH v1 2/8] convert ParallelBitmapHeapState->state to an atomic Nathan Bossart <nathan@postgresql.org>
2026-07-09 18:38 [PATCH v1 2/8] convert ParallelBitmapHeapState->state to an atomic Nathan Bossart <nathan@postgresql.org>
2026-07-09 18:38 [PATCH v1 2/8] convert ParallelBitmapHeapState->state to an atomic Nathan Bossart <nathan@postgresql.org>
2026-07-09 18:38 [PATCH v1 2/8] convert ParallelBitmapHeapState->state to an atomic Nathan Bossart <nathan@postgresql.org>
2026-07-09 18:38 [PATCH v1 2/8] convert ParallelBitmapHeapState->state to an atomic Nathan Bossart <nathan@postgresql.org>
2026-07-09 18:38 [PATCH v1 2/8] convert ParallelBitmapHeapState->state to an atomic Nathan Bossart <nathan@postgresql.org>
2026-07-09 18:38 [PATCH v1 2/8] convert ParallelBitmapHeapState->state to an atomic Nathan Bossart <nathan@postgresql.org>
2026-07-09 18:38 [PATCH v1 2/8] convert ParallelBitmapHeapState->state to an atomic Nathan Bossart <nathan@postgresql.org>
2026-07-09 18:38 [PATCH v1 2/8] convert ParallelBitmapHeapState->state to an atomic Nathan Bossart <nathan@postgresql.org>
2026-07-09 18:38 [PATCH v1 2/8] convert ParallelBitmapHeapState->state to an atomic Nathan Bossart <nathan@postgresql.org>
2026-07-09 18:38 [PATCH v1 2/8] convert ParallelBitmapHeapState->state to an atomic Nathan Bossart <nathan@postgresql.org>
2026-07-09 18:38 [PATCH v1 2/8] convert ParallelBitmapHeapState->state to an atomic Nathan Bossart <nathan@postgresql.org>
2026-07-09 18:38 [PATCH v1 2/8] convert ParallelBitmapHeapState->state to an atomic Nathan Bossart <nathan@postgresql.org>
2026-07-09 18:38 [PATCH v1 2/8] convert ParallelBitmapHeapState->state to an atomic Nathan Bossart <nathan@postgresql.org>
2026-07-09 18:38 [PATCH v1 2/8] convert ParallelBitmapHeapState->state to an atomic Nathan Bossart <nathan@postgresql.org>
2026-07-09 18:38 [PATCH v1 2/8] convert ParallelBitmapHeapState->state to an atomic Nathan Bossart <nathan@postgresql.org>
2026-07-09 18:38 [PATCH v1 2/8] convert ParallelBitmapHeapState->state to an atomic Nathan Bossart <nathan@postgresql.org>
2026-07-09 18:38 [PATCH v1 2/8] convert ParallelBitmapHeapState->state to an atomic Nathan Bossart <nathan@postgresql.org>
2026-07-09 18:38 [PATCH v1 2/8] convert ParallelBitmapHeapState->state to an atomic Nathan Bossart <nathan@postgresql.org>
2026-07-09 18:38 [PATCH v1 2/8] convert ParallelBitmapHeapState->state to an atomic Nathan Bossart <nathan@postgresql.org>
2026-07-09 18:38 [PATCH v1 2/8] convert ParallelBitmapHeapState->state to an atomic Nathan Bossart <nathan@postgresql.org>
2026-07-09 18:38 [PATCH v1 2/8] convert ParallelBitmapHeapState->state to an atomic Nathan Bossart <nathan@postgresql.org>
2026-07-09 18:38 [PATCH v1 2/8] convert ParallelBitmapHeapState->state to an atomic Nathan Bossart <nathan@postgresql.org>
2026-07-09 18:38 [PATCH v1 2/8] convert ParallelBitmapHeapState->state to an atomic Nathan Bossart <nathan@postgresql.org>
2026-07-09 18:38 [PATCH v2 2/9] convert ParallelBitmapHeapState->state to an atomic Nathan Bossart <nathan@postgresql.org>
2026-07-09 18:38 [PATCH v1 2/8] convert ParallelBitmapHeapState->state to an atomic Nathan Bossart <nathan@postgresql.org>
2026-07-09 18:38 [PATCH v1 2/8] convert ParallelBitmapHeapState->state to an atomic Nathan Bossart <nathan@postgresql.org>
2026-07-09 18:38 [PATCH v1 2/8] convert ParallelBitmapHeapState->state to an atomic Nathan Bossart <nathan@postgresql.org>
2026-07-09 18:38 [PATCH v1 2/8] convert ParallelBitmapHeapState->state to an atomic Nathan Bossart <nathan@postgresql.org>
2026-07-09 18:38 [PATCH v1 2/8] convert ParallelBitmapHeapState->state to an atomic Nathan Bossart <nathan@postgresql.org>
2026-07-09 18:38 [PATCH v1 2/8] convert ParallelBitmapHeapState->state to an atomic Nathan Bossart <nathan@postgresql.org>
2026-07-09 18:38 [PATCH v1 2/8] convert ParallelBitmapHeapState->state to an atomic Nathan Bossart <nathan@postgresql.org>
2026-07-09 18:38 [PATCH v1 2/8] convert ParallelBitmapHeapState->state to an atomic Nathan Bossart <nathan@postgresql.org>
2026-07-09 18:38 [PATCH v1 2/8] convert ParallelBitmapHeapState->state to an atomic Nathan Bossart <nathan@postgresql.org>
2026-07-09 18:38 [PATCH v1 2/8] convert ParallelBitmapHeapState->state to an atomic Nathan Bossart <nathan@postgresql.org>
2026-07-09 18:38 [PATCH v1 2/8] convert ParallelBitmapHeapState->state to an atomic Nathan Bossart <nathan@postgresql.org>
2026-07-09 18:38 [PATCH v1 2/8] convert ParallelBitmapHeapState->state to an atomic Nathan Bossart <nathan@postgresql.org>
2026-07-09 18:38 [PATCH v2 2/9] convert ParallelBitmapHeapState->state to an atomic Nathan Bossart <nathan@postgresql.org>
2026-07-09 18:38 [PATCH v2 2/9] convert ParallelBitmapHeapState->state to an atomic Nathan Bossart <nathan@postgresql.org>
2026-07-09 18:38 [PATCH v2 2/9] convert ParallelBitmapHeapState->state to an atomic Nathan Bossart <nathan@postgresql.org>
2026-07-09 18:38 [PATCH v2 2/9] convert ParallelBitmapHeapState->state to an atomic Nathan Bossart <nathan@postgresql.org>
2026-07-09 18:38 [PATCH v1 2/8] convert ParallelBitmapHeapState->state to an atomic Nathan Bossart <nathan@postgresql.org>
2026-07-09 18:38 [PATCH v2 2/9] convert ParallelBitmapHeapState->state to an atomic Nathan Bossart <nathan@postgresql.org>
2026-07-09 18:38 [PATCH v1 2/8] convert ParallelBitmapHeapState->state to an atomic Nathan Bossart <nathan@postgresql.org>
2026-07-09 18:38 [PATCH v1 2/8] convert ParallelBitmapHeapState->state to an atomic Nathan Bossart <nathan@postgresql.org>
2026-07-09 18:38 [PATCH v1 2/8] convert ParallelBitmapHeapState->state to an atomic Nathan Bossart <nathan@postgresql.org>
2026-07-09 18:38 [PATCH v1 2/8] convert ParallelBitmapHeapState->state to an atomic Nathan Bossart <nathan@postgresql.org>
2026-07-09 18:38 [PATCH v1 2/8] convert ParallelBitmapHeapState->state to an atomic Nathan Bossart <nathan@postgresql.org>
2026-07-09 18:38 [PATCH v1 2/8] convert ParallelBitmapHeapState->state to an atomic Nathan Bossart <nathan@postgresql.org>
2026-07-09 18:38 [PATCH v1 2/8] convert ParallelBitmapHeapState->state to an atomic Nathan Bossart <nathan@postgresql.org>
2026-07-09 18:38 [PATCH v1 2/8] convert ParallelBitmapHeapState->state to an atomic Nathan Bossart <nathan@postgresql.org>
2026-07-09 18:38 [PATCH v1 2/8] convert ParallelBitmapHeapState->state to an atomic Nathan Bossart <nathan@postgresql.org>
2026-07-09 18:38 [PATCH v1 2/8] convert ParallelBitmapHeapState->state to an atomic Nathan Bossart <nathan@postgresql.org>
2026-07-09 18:38 [PATCH v1 2/8] convert ParallelBitmapHeapState->state to an atomic Nathan Bossart <nathan@postgresql.org>
2026-07-09 18:38 [PATCH v1 2/8] convert ParallelBitmapHeapState->state to an atomic Nathan Bossart <nathan@postgresql.org>
2026-07-09 18:38 [PATCH v1 2/8] convert ParallelBitmapHeapState->state to an atomic Nathan Bossart <nathan@postgresql.org>
2026-07-09 18:38 [PATCH v1 2/8] convert ParallelBitmapHeapState->state to an atomic Nathan Bossart <nathan@postgresql.org>
2026-07-09 18:38 [PATCH v1 2/8] convert ParallelBitmapHeapState->state to an atomic Nathan Bossart <nathan@postgresql.org>
2026-07-09 18:38 [PATCH v1 2/8] convert ParallelBitmapHeapState->state to an atomic Nathan Bossart <nathan@postgresql.org>
2026-07-09 18:38 [PATCH v1 2/8] convert ParallelBitmapHeapState->state to an atomic Nathan Bossart <nathan@postgresql.org>
2026-07-09 18:38 [PATCH v1 2/8] convert ParallelBitmapHeapState->state to an atomic Nathan Bossart <nathan@postgresql.org>
2026-07-09 18:38 [PATCH v1 2/8] convert ParallelBitmapHeapState->state to an atomic Nathan Bossart <nathan@postgresql.org>
2026-07-09 18:38 [PATCH v2 2/9] convert ParallelBitmapHeapState->state to an atomic Nathan Bossart <nathan@postgresql.org>
2026-07-09 18:38 [PATCH v2 2/9] convert ParallelBitmapHeapState->state to an atomic Nathan Bossart <nathan@postgresql.org>
2026-07-09 18:38 [PATCH v1 2/8] convert ParallelBitmapHeapState->state to an atomic Nathan Bossart <nathan@postgresql.org>
2026-07-09 18:38 [PATCH v1 2/8] convert ParallelBitmapHeapState->state to an atomic Nathan Bossart <nathan@postgresql.org>
2026-07-09 18:38 [PATCH v1 2/8] convert ParallelBitmapHeapState->state to an atomic Nathan Bossart <nathan@postgresql.org>
2026-07-09 18:38 [PATCH v2 2/9] convert ParallelBitmapHeapState->state to an atomic Nathan Bossart <nathan@postgresql.org>
2026-07-09 18:38 [PATCH v2 2/9] convert ParallelBitmapHeapState->state to an atomic Nathan Bossart <nathan@postgresql.org>
2026-07-09 18:38 [PATCH v1 2/8] convert ParallelBitmapHeapState->state to an atomic Nathan Bossart <nathan@postgresql.org>
2026-07-09 18:38 [PATCH v1 2/8] convert ParallelBitmapHeapState->state to an atomic Nathan Bossart <nathan@postgresql.org>
2026-07-09 18:38 [PATCH v1 2/8] convert ParallelBitmapHeapState->state to an atomic Nathan Bossart <nathan@postgresql.org>
2026-07-09 18:38 [PATCH v1 2/8] convert ParallelBitmapHeapState->state to an atomic Nathan Bossart <nathan@postgresql.org>
2026-07-09 18:38 [PATCH v1 2/8] convert ParallelBitmapHeapState->state to an atomic Nathan Bossart <nathan@postgresql.org>
2026-07-09 18:38 [PATCH v2 2/9] convert ParallelBitmapHeapState->state to an atomic Nathan Bossart <nathan@postgresql.org>
2026-07-09 18:38 [PATCH v2 2/9] convert ParallelBitmapHeapState->state to an atomic Nathan Bossart <nathan@postgresql.org>
2026-07-09 18:38 [PATCH v1 2/8] convert ParallelBitmapHeapState->state to an atomic Nathan Bossart <nathan@postgresql.org>
2026-07-09 18:38 [PATCH v1 2/8] convert ParallelBitmapHeapState->state to an atomic Nathan Bossart <nathan@postgresql.org>
2026-07-09 18:38 [PATCH v1 2/8] convert ParallelBitmapHeapState->state to an atomic Nathan Bossart <nathan@postgresql.org>
2026-07-09 18:38 [PATCH v1 2/8] convert ParallelBitmapHeapState->state to an atomic Nathan Bossart <nathan@postgresql.org>
2026-07-09 18:38 [PATCH v1 2/8] convert ParallelBitmapHeapState->state to an atomic Nathan Bossart <nathan@postgresql.org>
2026-07-09 18:38 [PATCH v1 2/8] convert ParallelBitmapHeapState->state to an atomic Nathan Bossart <nathan@postgresql.org>
2026-07-09 18:38 [PATCH v1 2/8] convert ParallelBitmapHeapState->state to an atomic Nathan Bossart <nathan@postgresql.org>
2026-07-09 18:38 [PATCH v1 2/8] convert ParallelBitmapHeapState->state to an atomic Nathan Bossart <nathan@postgresql.org>
2026-07-09 18:38 [PATCH v1 2/8] convert ParallelBitmapHeapState->state to an atomic Nathan Bossart <nathan@postgresql.org>
2026-07-09 18:38 [PATCH v1 2/8] convert ParallelBitmapHeapState->state to an atomic Nathan Bossart <nathan@postgresql.org>
2026-07-09 18:38 [PATCH v1 2/8] convert ParallelBitmapHeapState->state to an atomic Nathan Bossart <nathan@postgresql.org>
2026-07-09 18:38 [PATCH v1 2/8] convert ParallelBitmapHeapState->state to an atomic Nathan Bossart <nathan@postgresql.org>
2026-07-09 18:38 [PATCH v1 2/8] convert ParallelBitmapHeapState->state to an atomic Nathan Bossart <nathan@postgresql.org>
2026-07-09 18:38 [PATCH v2 2/9] convert ParallelBitmapHeapState->state to an atomic Nathan Bossart <nathan@postgresql.org>
2026-07-09 18:38 [PATCH v2 2/9] convert ParallelBitmapHeapState->state to an atomic Nathan Bossart <nathan@postgresql.org>
2026-07-09 18:38 [PATCH v2 2/9] convert ParallelBitmapHeapState->state to an atomic Nathan Bossart <nathan@postgresql.org>
2026-07-09 18:38 [PATCH v2 2/9] convert ParallelBitmapHeapState->state to an atomic Nathan Bossart <nathan@postgresql.org>
2026-07-09 18:38 [PATCH v1 2/8] convert ParallelBitmapHeapState->state to an atomic Nathan Bossart <nathan@postgresql.org>
2026-07-09 18:38 [PATCH v1 2/8] convert ParallelBitmapHeapState->state to an atomic Nathan Bossart <nathan@postgresql.org>
2026-07-09 18:38 [PATCH v1 2/8] convert ParallelBitmapHeapState->state to an atomic Nathan Bossart <nathan@postgresql.org>
2026-07-09 18:38 [PATCH v2 2/9] convert ParallelBitmapHeapState->state to an atomic Nathan Bossart <nathan@postgresql.org>
2026-07-09 18:38 [PATCH v2 2/9] convert ParallelBitmapHeapState->state to an atomic Nathan Bossart <nathan@postgresql.org>
2026-07-09 18:38 [PATCH v2 2/9] convert ParallelBitmapHeapState->state to an atomic Nathan Bossart <nathan@postgresql.org>
2026-07-09 18:38 [PATCH v2 2/9] convert ParallelBitmapHeapState->state to an atomic Nathan Bossart <nathan@postgresql.org>
2026-07-09 18:38 [PATCH v2 2/9] convert ParallelBitmapHeapState->state to an atomic Nathan Bossart <nathan@postgresql.org>
2026-07-09 18:38 [PATCH v2 2/9] convert ParallelBitmapHeapState->state to an atomic Nathan Bossart <nathan@postgresql.org>
2026-07-09 18:38 [PATCH v1 2/8] convert ParallelBitmapHeapState->state to an atomic Nathan Bossart <nathan@postgresql.org>
2026-07-09 18:38 [PATCH v1 2/8] convert ParallelBitmapHeapState->state to an atomic Nathan Bossart <nathan@postgresql.org>
2026-07-09 18:38 [PATCH v1 2/8] convert ParallelBitmapHeapState->state to an atomic Nathan Bossart <nathan@postgresql.org>
2026-07-09 18:38 [PATCH v1 2/8] convert ParallelBitmapHeapState->state to an atomic Nathan Bossart <nathan@postgresql.org>
2026-07-09 18:38 [PATCH v1 2/8] convert ParallelBitmapHeapState->state to an atomic Nathan Bossart <nathan@postgresql.org>
2026-07-09 18:38 [PATCH v1 2/8] convert ParallelBitmapHeapState->state to an atomic Nathan Bossart <nathan@postgresql.org>
2026-07-09 18:38 [PATCH v1 2/8] convert ParallelBitmapHeapState->state to an atomic Nathan Bossart <nathan@postgresql.org>
2026-07-09 18:38 [PATCH v1 2/8] convert ParallelBitmapHeapState->state to an atomic Nathan Bossart <nathan@postgresql.org>
2026-07-09 18:38 [PATCH v1 2/8] convert ParallelBitmapHeapState->state to an atomic Nathan Bossart <nathan@postgresql.org>
2026-07-09 18:38 [PATCH v2 2/9] convert ParallelBitmapHeapState->state to an atomic Nathan Bossart <nathan@postgresql.org>
2026-07-09 18:38 [PATCH v1 2/8] convert ParallelBitmapHeapState->state to an atomic Nathan Bossart <nathan@postgresql.org>
2026-07-09 18:38 [PATCH v2 2/9] convert ParallelBitmapHeapState->state to an atomic Nathan Bossart <nathan@postgresql.org>
2026-07-09 18:38 [PATCH v2 2/9] convert ParallelBitmapHeapState->state to an atomic Nathan Bossart <nathan@postgresql.org>
2026-07-09 18:38 [PATCH v1 2/8] convert ParallelBitmapHeapState->state to an atomic Nathan Bossart <nathan@postgresql.org>
2026-07-09 18:38 [PATCH v1 2/8] convert ParallelBitmapHeapState->state to an atomic Nathan Bossart <nathan@postgresql.org>
2026-07-09 18:38 [PATCH v1 2/8] convert ParallelBitmapHeapState->state to an atomic Nathan Bossart <nathan@postgresql.org>
2026-07-09 18:38 [PATCH v2 2/9] convert ParallelBitmapHeapState->state to an atomic Nathan Bossart <nathan@postgresql.org>
2026-07-09 18:38 [PATCH v1 2/8] convert ParallelBitmapHeapState->state to an atomic Nathan Bossart <nathan@postgresql.org>
2026-07-09 18:38 [PATCH v1 2/8] convert ParallelBitmapHeapState->state to an atomic Nathan Bossart <nathan@postgresql.org>
2026-07-09 18:38 [PATCH v1 2/8] convert ParallelBitmapHeapState->state to an atomic Nathan Bossart <nathan@postgresql.org>
2026-07-09 18:38 [PATCH v1 2/8] convert ParallelBitmapHeapState->state to an atomic Nathan Bossart <nathan@postgresql.org>
2026-07-09 18:38 [PATCH v1 2/8] convert ParallelBitmapHeapState->state to an atomic Nathan Bossart <nathan@postgresql.org>
2026-07-09 18:38 [PATCH v1 2/8] convert ParallelBitmapHeapState->state to an atomic Nathan Bossart <nathan@postgresql.org>
2026-07-09 18:38 [PATCH v1 2/8] convert ParallelBitmapHeapState->state to an atomic Nathan Bossart <nathan@postgresql.org>
2026-07-09 18:38 [PATCH v1 2/8] convert ParallelBitmapHeapState->state to an atomic Nathan Bossart <nathan@postgresql.org>
2026-07-09 18:38 [PATCH v1 2/8] convert ParallelBitmapHeapState->state to an atomic Nathan Bossart <nathan@postgresql.org>
2026-07-09 18:38 [PATCH v2 2/9] convert ParallelBitmapHeapState->state to an atomic Nathan Bossart <nathan@postgresql.org>
2026-07-09 18:38 [PATCH v1 2/8] convert ParallelBitmapHeapState->state to an atomic Nathan Bossart <nathan@postgresql.org>
2026-07-09 18:38 [PATCH v1 2/8] convert ParallelBitmapHeapState->state to an atomic Nathan Bossart <nathan@postgresql.org>
2026-07-09 18:38 [PATCH v1 2/8] convert ParallelBitmapHeapState->state to an atomic Nathan Bossart <nathan@postgresql.org>
2026-07-09 18:38 [PATCH v1 2/8] convert ParallelBitmapHeapState->state to an atomic Nathan Bossart <nathan@postgresql.org>
2026-07-09 18:38 [PATCH v1 2/8] convert ParallelBitmapHeapState->state to an atomic Nathan Bossart <nathan@postgresql.org>
2026-07-09 18:38 [PATCH v2 2/9] convert ParallelBitmapHeapState->state to an atomic Nathan Bossart <nathan@postgresql.org>
2026-07-09 18:38 [PATCH v1 2/8] convert ParallelBitmapHeapState->state to an atomic Nathan Bossart <nathan@postgresql.org>
2026-07-09 18:38 [PATCH v1 2/8] convert ParallelBitmapHeapState->state to an atomic Nathan Bossart <nathan@postgresql.org>
2026-07-09 18:38 [PATCH v1 2/8] convert ParallelBitmapHeapState->state to an atomic Nathan Bossart <nathan@postgresql.org>
2026-07-09 18:38 [PATCH v1 2/8] convert ParallelBitmapHeapState->state to an atomic Nathan Bossart <nathan@postgresql.org>
2026-07-09 18:38 [PATCH v1 2/8] convert ParallelBitmapHeapState->state to an atomic Nathan Bossart <nathan@postgresql.org>
2026-07-09 18:38 [PATCH v1 2/8] convert ParallelBitmapHeapState->state to an atomic Nathan Bossart <nathan@postgresql.org>
2026-07-09 18:38 [PATCH v1 2/8] convert ParallelBitmapHeapState->state to an atomic Nathan Bossart <nathan@postgresql.org>
2026-07-09 18:38 [PATCH v2 2/9] convert ParallelBitmapHeapState->state to an atomic Nathan Bossart <nathan@postgresql.org>
2026-07-09 18:38 [PATCH v2 2/9] convert ParallelBitmapHeapState->state to an atomic Nathan Bossart <nathan@postgresql.org>
2026-07-09 18:38 [PATCH v1 2/8] convert ParallelBitmapHeapState->state to an atomic Nathan Bossart <nathan@postgresql.org>
2026-07-09 18:38 [PATCH v1 2/8] convert ParallelBitmapHeapState->state to an atomic Nathan Bossart <nathan@postgresql.org>
2026-07-09 18:38 [PATCH v1 2/8] convert ParallelBitmapHeapState->state to an atomic Nathan Bossart <nathan@postgresql.org>
2026-07-09 18:38 [PATCH v2 2/9] convert ParallelBitmapHeapState->state to an atomic Nathan Bossart <nathan@postgresql.org>
2026-07-09 18:38 [PATCH v1 2/8] convert ParallelBitmapHeapState->state to an atomic Nathan Bossart <nathan@postgresql.org>
2026-07-09 18:38 [PATCH v2 2/9] convert ParallelBitmapHeapState->state to an atomic Nathan Bossart <nathan@postgresql.org>
2026-07-09 18:38 [PATCH v1 2/8] convert ParallelBitmapHeapState->state to an atomic Nathan Bossart <nathan@postgresql.org>
2026-07-09 18:38 [PATCH v2 2/9] convert ParallelBitmapHeapState->state to an atomic Nathan Bossart <nathan@postgresql.org>
2026-07-09 18:38 [PATCH v2 2/9] convert ParallelBitmapHeapState->state to an atomic Nathan Bossart <nathan@postgresql.org>
2026-07-09 18:38 [PATCH v2 2/9] convert ParallelBitmapHeapState->state to an atomic Nathan Bossart <nathan@postgresql.org>
2026-07-09 18:38 [PATCH v1 2/8] convert ParallelBitmapHeapState->state to an atomic Nathan Bossart <nathan@postgresql.org>
2026-07-09 18:38 [PATCH v1 2/8] convert ParallelBitmapHeapState->state to an atomic Nathan Bossart <nathan@postgresql.org>
2026-07-09 18:38 [PATCH v1 2/8] convert ParallelBitmapHeapState->state to an atomic Nathan Bossart <nathan@postgresql.org>
2026-07-09 18:38 [PATCH v2 2/9] convert ParallelBitmapHeapState->state to an atomic Nathan Bossart <nathan@postgresql.org>
2026-07-09 18:38 [PATCH v1 2/8] convert ParallelBitmapHeapState->state to an atomic Nathan Bossart <nathan@postgresql.org>
2026-07-09 18:38 [PATCH v1 2/8] convert ParallelBitmapHeapState->state to an atomic Nathan Bossart <nathan@postgresql.org>
2026-07-09 18:38 [PATCH v2 2/9] convert ParallelBitmapHeapState->state to an atomic Nathan Bossart <nathan@postgresql.org>
2026-07-09 18:38 [PATCH v1 2/8] convert ParallelBitmapHeapState->state to an atomic Nathan Bossart <nathan@postgresql.org>
2026-07-09 18:38 [PATCH v1 2/8] convert ParallelBitmapHeapState->state to an atomic Nathan Bossart <nathan@postgresql.org>
2026-07-09 18:38 [PATCH v1 2/8] convert ParallelBitmapHeapState->state to an atomic Nathan Bossart <nathan@postgresql.org>
2026-07-09 18:38 [PATCH v1 2/8] convert ParallelBitmapHeapState->state to an atomic Nathan Bossart <nathan@postgresql.org>
2026-07-09 18:38 [PATCH v1 2/8] convert ParallelBitmapHeapState->state to an atomic Nathan Bossart <nathan@postgresql.org>
2026-07-09 18:38 [PATCH v1 2/8] convert ParallelBitmapHeapState->state to an atomic Nathan Bossart <nathan@postgresql.org>
2026-07-09 18:38 [PATCH v2 2/9] convert ParallelBitmapHeapState->state to an atomic Nathan Bossart <nathan@postgresql.org>
2026-07-09 18:38 [PATCH v1 2/8] convert ParallelBitmapHeapState->state to an atomic Nathan Bossart <nathan@postgresql.org>
2026-07-09 18:38 [PATCH v1 2/8] convert ParallelBitmapHeapState->state to an atomic Nathan Bossart <nathan@postgresql.org>
2026-07-09 18:38 [PATCH v1 2/8] convert ParallelBitmapHeapState->state to an atomic Nathan Bossart <nathan@postgresql.org>
2026-07-09 18:38 [PATCH v1 2/8] convert ParallelBitmapHeapState->state to an atomic Nathan Bossart <nathan@postgresql.org>
2026-07-09 18:38 [PATCH v1 2/8] convert ParallelBitmapHeapState->state to an atomic Nathan Bossart <nathan@postgresql.org>
2026-07-09 18:38 [PATCH v1 2/8] convert ParallelBitmapHeapState->state to an atomic Nathan Bossart <nathan@postgresql.org>
2026-07-09 18:38 [PATCH v1 2/8] convert ParallelBitmapHeapState->state to an atomic Nathan Bossart <nathan@postgresql.org>
2026-07-09 18:38 [PATCH v1 2/8] convert ParallelBitmapHeapState->state to an atomic Nathan Bossart <nathan@postgresql.org>
2026-07-09 18:38 [PATCH v2 2/9] convert ParallelBitmapHeapState->state to an atomic Nathan Bossart <nathan@postgresql.org>
2026-07-09 18:38 [PATCH v1 2/8] convert ParallelBitmapHeapState->state to an atomic Nathan Bossart <nathan@postgresql.org>
2026-07-09 18:38 [PATCH v1 2/8] convert ParallelBitmapHeapState->state to an atomic Nathan Bossart <nathan@postgresql.org>
2026-07-09 18:38 [PATCH v1 2/8] convert ParallelBitmapHeapState->state to an atomic Nathan Bossart <nathan@postgresql.org>
2026-07-09 18:38 [PATCH v2 2/9] convert ParallelBitmapHeapState->state to an atomic Nathan Bossart <nathan@postgresql.org>
2026-07-09 18:38 [PATCH v1 2/8] convert ParallelBitmapHeapState->state to an atomic Nathan Bossart <nathan@postgresql.org>
2026-07-09 18:38 [PATCH v1 2/8] convert ParallelBitmapHeapState->state to an atomic Nathan Bossart <nathan@postgresql.org>
2026-07-09 18:38 [PATCH v2 2/9] convert ParallelBitmapHeapState->state to an atomic Nathan Bossart <nathan@postgresql.org>
2026-07-09 18:38 [PATCH v2 2/9] convert ParallelBitmapHeapState->state to an atomic Nathan Bossart <nathan@postgresql.org>
2026-07-09 18:38 [PATCH v1 2/8] convert ParallelBitmapHeapState->state to an atomic Nathan Bossart <nathan@postgresql.org>
2026-07-09 18:38 [PATCH v1 2/8] convert ParallelBitmapHeapState->state to an atomic Nathan Bossart <nathan@postgresql.org>
2026-07-09 18:38 [PATCH v2 2/9] convert ParallelBitmapHeapState->state to an atomic Nathan Bossart <nathan@postgresql.org>
2026-07-09 18:38 [PATCH v1 2/8] convert ParallelBitmapHeapState->state to an atomic Nathan Bossart <nathan@postgresql.org>
2026-07-09 18:38 [PATCH v1 2/8] convert ParallelBitmapHeapState->state to an atomic Nathan Bossart <nathan@postgresql.org>
2026-07-09 18:38 [PATCH v2 2/9] convert ParallelBitmapHeapState->state to an atomic Nathan Bossart <nathan@postgresql.org>
2026-07-09 18:38 [PATCH v2 2/9] convert ParallelBitmapHeapState->state to an atomic Nathan Bossart <nathan@postgresql.org>
2026-07-09 18:38 [PATCH v1 2/8] convert ParallelBitmapHeapState->state to an atomic Nathan Bossart <nathan@postgresql.org>
2026-07-09 18:38 [PATCH v1 2/8] convert ParallelBitmapHeapState->state to an atomic Nathan Bossart <nathan@postgresql.org>
2026-07-09 18:38 [PATCH v1 2/8] convert ParallelBitmapHeapState->state to an atomic Nathan Bossart <nathan@postgresql.org>
2026-07-09 18:38 [PATCH v1 2/8] convert ParallelBitmapHeapState->state to an atomic Nathan Bossart <nathan@postgresql.org>
2026-07-09 18:38 [PATCH v2 2/9] convert ParallelBitmapHeapState->state to an atomic Nathan Bossart <nathan@postgresql.org>
2026-07-09 18:38 [PATCH v1 2/8] convert ParallelBitmapHeapState->state to an atomic Nathan Bossart <nathan@postgresql.org>
2026-07-09 18:38 [PATCH v1 2/8] convert ParallelBitmapHeapState->state to an atomic Nathan Bossart <nathan@postgresql.org>
2026-07-09 18:38 [PATCH v1 2/8] convert ParallelBitmapHeapState->state to an atomic Nathan Bossart <nathan@postgresql.org>
2026-07-09 18:38 [PATCH v1 2/8] convert ParallelBitmapHeapState->state to an atomic Nathan Bossart <nathan@postgresql.org>
2026-07-09 18:38 [PATCH v1 2/8] convert ParallelBitmapHeapState->state to an atomic Nathan Bossart <nathan@postgresql.org>
2026-07-09 18:38 [PATCH v2 2/9] convert ParallelBitmapHeapState->state to an atomic Nathan Bossart <nathan@postgresql.org>
2026-07-09 18:38 [PATCH v1 2/8] convert ParallelBitmapHeapState->state to an atomic Nathan Bossart <nathan@postgresql.org>
2026-07-09 18:38 [PATCH v1 2/8] convert ParallelBitmapHeapState->state to an atomic Nathan Bossart <nathan@postgresql.org>
2026-07-09 18:38 [PATCH v2 2/9] convert ParallelBitmapHeapState->state to an atomic Nathan Bossart <nathan@postgresql.org>
2026-07-09 18:38 [PATCH v2 2/9] convert ParallelBitmapHeapState->state to an atomic Nathan Bossart <nathan@postgresql.org>
2026-07-09 18:38 [PATCH v1 2/8] convert ParallelBitmapHeapState->state to an atomic Nathan Bossart <nathan@postgresql.org>
2026-07-09 18:38 [PATCH v1 2/8] convert ParallelBitmapHeapState->state to an atomic Nathan Bossart <nathan@postgresql.org>
2026-07-09 18:38 [PATCH v2 2/9] convert ParallelBitmapHeapState->state to an atomic Nathan Bossart <nathan@postgresql.org>
2026-07-09 18:38 [PATCH v2 2/9] convert ParallelBitmapHeapState->state to an atomic Nathan Bossart <nathan@postgresql.org>
2026-07-09 18:38 [PATCH v2 2/9] convert ParallelBitmapHeapState->state to an atomic Nathan Bossart <nathan@postgresql.org>
2026-07-09 18:38 [PATCH v2 2/9] convert ParallelBitmapHeapState->state to an atomic Nathan Bossart <nathan@postgresql.org>
2026-07-09 18:38 [PATCH v2 2/9] convert ParallelBitmapHeapState->state to an atomic Nathan Bossart <nathan@postgresql.org>
2026-07-09 18:38 [PATCH v1 2/8] convert ParallelBitmapHeapState->state to an atomic Nathan Bossart <nathan@postgresql.org>
2026-07-09 18:38 [PATCH v1 2/8] convert ParallelBitmapHeapState->state to an atomic Nathan Bossart <nathan@postgresql.org>
2026-07-09 18:38 [PATCH v2 2/9] convert ParallelBitmapHeapState->state to an atomic Nathan Bossart <nathan@postgresql.org>
2026-07-09 18:38 [PATCH v1 2/8] convert ParallelBitmapHeapState->state to an atomic Nathan Bossart <nathan@postgresql.org>
2026-07-09 18:38 [PATCH v1 2/8] convert ParallelBitmapHeapState->state to an atomic Nathan Bossart <nathan@postgresql.org>
2026-07-09 18:38 [PATCH v2 2/9] convert ParallelBitmapHeapState->state to an atomic Nathan Bossart <nathan@postgresql.org>
2026-07-09 18:38 [PATCH v2 2/9] convert ParallelBitmapHeapState->state to an atomic Nathan Bossart <nathan@postgresql.org>
2026-07-09 18:38 [PATCH v1 2/8] convert ParallelBitmapHeapState->state to an atomic Nathan Bossart <nathan@postgresql.org>
2026-07-09 18:38 [PATCH v1 2/8] convert ParallelBitmapHeapState->state to an atomic Nathan Bossart <nathan@postgresql.org>
2026-07-09 18:38 [PATCH v1 2/8] convert ParallelBitmapHeapState->state to an atomic Nathan Bossart <nathan@postgresql.org>
2026-07-09 18:38 [PATCH v1 2/8] convert ParallelBitmapHeapState->state to an atomic Nathan Bossart <nathan@postgresql.org>
2026-07-09 18:38 [PATCH v2 2/9] convert ParallelBitmapHeapState->state to an atomic Nathan Bossart <nathan@postgresql.org>
2026-07-09 18:38 [PATCH v2 2/9] convert ParallelBitmapHeapState->state to an atomic Nathan Bossart <nathan@postgresql.org>
2026-07-09 18:38 [PATCH v1 2/8] convert ParallelBitmapHeapState->state to an atomic Nathan Bossart <nathan@postgresql.org>
2026-07-09 18:38 [PATCH v1 2/8] convert ParallelBitmapHeapState->state to an atomic Nathan Bossart <nathan@postgresql.org>
2026-07-09 18:38 [PATCH v1 2/8] convert ParallelBitmapHeapState->state to an atomic Nathan Bossart <nathan@postgresql.org>
2026-07-09 18:38 [PATCH v1 2/8] convert ParallelBitmapHeapState->state to an atomic Nathan Bossart <nathan@postgresql.org>
2026-07-09 18:38 [PATCH v1 2/8] convert ParallelBitmapHeapState->state to an atomic Nathan Bossart <nathan@postgresql.org>
2026-07-09 18:38 [PATCH v2 2/9] convert ParallelBitmapHeapState->state to an atomic Nathan Bossart <nathan@postgresql.org>
2026-07-09 18:38 [PATCH v2 2/9] convert ParallelBitmapHeapState->state to an atomic Nathan Bossart <nathan@postgresql.org>
2026-07-09 18:38 [PATCH v2 2/9] convert ParallelBitmapHeapState->state to an atomic Nathan Bossart <nathan@postgresql.org>
2026-07-09 18:38 [PATCH v2 2/9] convert ParallelBitmapHeapState->state to an atomic Nathan Bossart <nathan@postgresql.org>
2026-07-09 18:38 [PATCH v1 2/8] convert ParallelBitmapHeapState->state to an atomic Nathan Bossart <nathan@postgresql.org>
2026-07-09 18:38 [PATCH v1 2/8] convert ParallelBitmapHeapState->state to an atomic Nathan Bossart <nathan@postgresql.org>
2026-07-09 18:38 [PATCH v2 2/9] convert ParallelBitmapHeapState->state to an atomic Nathan Bossart <nathan@postgresql.org>
2026-07-09 18:38 [PATCH v2 2/9] convert ParallelBitmapHeapState->state to an atomic Nathan Bossart <nathan@postgresql.org>
2026-07-09 18:38 [PATCH v2 2/9] convert ParallelBitmapHeapState->state to an atomic Nathan Bossart <nathan@postgresql.org>
2026-07-09 18:38 [PATCH v1 2/8] convert ParallelBitmapHeapState->state to an atomic Nathan Bossart <nathan@postgresql.org>
2026-07-09 18:38 [PATCH v1 2/8] convert ParallelBitmapHeapState->state to an atomic Nathan Bossart <nathan@postgresql.org>
2026-07-09 18:38 [PATCH v1 2/8] convert ParallelBitmapHeapState->state to an atomic Nathan Bossart <nathan@postgresql.org>
2026-07-09 18:38 [PATCH v2 2/9] convert ParallelBitmapHeapState->state to an atomic Nathan Bossart <nathan@postgresql.org>
2026-07-09 18:38 [PATCH v2 2/9] convert ParallelBitmapHeapState->state to an atomic Nathan Bossart <nathan@postgresql.org>
2026-07-09 18:38 [PATCH v2 2/9] convert ParallelBitmapHeapState->state to an atomic Nathan Bossart <nathan@postgresql.org>
2026-07-09 18:38 [PATCH v1 2/8] convert ParallelBitmapHeapState->state to an atomic Nathan Bossart <nathan@postgresql.org>
2026-07-09 18:38 [PATCH v1 2/8] convert ParallelBitmapHeapState->state to an atomic Nathan Bossart <nathan@postgresql.org>
2026-07-09 18:38 [PATCH v1 2/8] convert ParallelBitmapHeapState->state to an atomic Nathan Bossart <nathan@postgresql.org>
2026-07-09 18:38 [PATCH v2 2/9] convert ParallelBitmapHeapState->state to an atomic Nathan Bossart <nathan@postgresql.org>
2026-07-09 18:38 [PATCH v1 2/8] convert ParallelBitmapHeapState->state to an atomic Nathan Bossart <nathan@postgresql.org>

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