agora inbox for [email protected]  

help / color / mirror / Atom feed

[PATCH v7 2/3] Handle default tablespace in AlterTableInternal
167+ messages / 2 participants
[nested] [flat]

* [PATCH v7 2/3] Handle default tablespace in AlterTableInternal
@ 2025-08-04 22:05  Erik Wienhold <[email protected]>
  0 siblings, 0 replies; 167+ messages in thread

From: Erik Wienhold @ 2025-08-04 22:05 UTC (permalink / raw)

Move handling of default tablespace for CREATE OR REPLACE MATERIALIZED
VIEW from create_ctas_internal to ATPrepSetTableSpace.  It feels cleaner
that way in my opinion by not having to resolve the tablespace name just
to pass it to AlterTableInternal.  The default table space is passed as
empty string to AlterTableInternal.
---
 src/backend/commands/createas.c  | 21 ++-------------------
 src/backend/commands/tablecmds.c | 14 ++++++++++++--
 2 files changed, 14 insertions(+), 21 deletions(-)

diff --git a/src/backend/commands/createas.c b/src/backend/commands/createas.c
index 1620273f965..30ca0a21903 100644
--- a/src/backend/commands/createas.c
+++ b/src/backend/commands/createas.c
@@ -24,7 +24,6 @@
  */
 #include "postgres.h"
 
-#include "miscadmin.h"
 #include "access/heapam.h"
 #include "access/reloptions.h"
 #include "access/tableam.h"
@@ -35,7 +34,6 @@
 #include "commands/matview.h"
 #include "commands/prepare.h"
 #include "commands/tablecmds.h"
-#include "commands/tablespace.h"
 #include "commands/view.h"
 #include "executor/execdesc.h"
 #include "executor/executor.h"
@@ -160,23 +158,8 @@ create_ctas_internal(List *attrList, IntoClause *into)
 		/* tablespace */
 		atcmd = makeNode(AlterTableCmd);
 		atcmd->subtype = AT_SetTableSpace;
-		if (into->tableSpaceName != NULL)
-			atcmd->name = into->tableSpaceName;
-		else
-		{
-			Oid spcid;
-
-			/*
-			 * Resolve the name of the default or database tablespace because
-			 * we need to specify the tablespace by name.
-			 *
-			 * TODO: Move that to ATPrepSetTableSpace? Must allow AlterTableCmd.name to be NULL then.
-			 */
-			spcid = GetDefaultTablespace(RELPERSISTENCE_PERMANENT, false);
-			if (!OidIsValid(spcid))
-				spcid = MyDatabaseTableSpace;
-			atcmd->name = get_tablespace_name(spcid);
-		}
+		/* use empty string to specify default tablespace */
+		atcmd->name = into->tableSpaceName ? into->tableSpaceName : "";
 		atcmds = lappend(atcmds, atcmd);
 
 		/* storage options */
diff --git a/src/backend/commands/tablecmds.c b/src/backend/commands/tablecmds.c
index 44dcd2c5b0d..6ec0b87f841 100644
--- a/src/backend/commands/tablecmds.c
+++ b/src/backend/commands/tablecmds.c
@@ -16580,8 +16580,18 @@ ATPrepSetTableSpace(AlteredTableInfo *tab, Relation rel, const char *tablespacen
 {
 	Oid			tablespaceId;
 
-	/* Check that the tablespace exists */
-	tablespaceId = get_tablespace_oid(tablespacename, false);
+	if (tablespacename != NULL && tablespacename[0] == '\0')
+	{
+		/* Use default tablespace if name is empty string */
+		tablespaceId = GetDefaultTablespace(rel->rd_rel->relpersistence, rel->rd_rel->relispartition);
+		if (!OidIsValid(tablespaceId))
+			tablespaceId = MyDatabaseTableSpace;
+	}
+	else
+	{
+		/* Check that the tablespace exists */
+		tablespaceId = get_tablespace_oid(tablespacename, false);
+	}
 
 	/* Check permissions except when moving to database's default */
 	if (OidIsValid(tablespaceId) && tablespaceId != MyDatabaseTableSpace)
-- 
2.50.1


--r33ycpluvyfavkwy
Content-Type: text/plain; charset=us-ascii
Content-Disposition: attachment;
	filename="v7-0003-Add-WITH-OLD-DATA-to-CREATE-OR-REPLACE-MATERIALIZ.patch"



^ permalink  raw  reply  [nested|flat] 167+ messages in thread

* [PATCH v1 2/8] convert ParallelBitmapHeapState->state to an atomic
@ 2026-07-09 18:38  Nathan Bossart <[email protected]>
  0 siblings, 0 replies; 167+ messages in thread

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

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

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


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



^ permalink  raw  reply  [nested|flat] 167+ messages in thread

* [PATCH v1 2/8] convert ParallelBitmapHeapState->state to an atomic
@ 2026-07-09 18:38  Nathan Bossart <[email protected]>
  0 siblings, 0 replies; 167+ messages in thread

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

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

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


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



^ permalink  raw  reply  [nested|flat] 167+ messages in thread

* [PATCH v1 2/8] convert ParallelBitmapHeapState->state to an atomic
@ 2026-07-09 18:38  Nathan Bossart <[email protected]>
  0 siblings, 0 replies; 167+ messages in thread

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

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

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


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



^ permalink  raw  reply  [nested|flat] 167+ messages in thread

* [PATCH v1 2/8] convert ParallelBitmapHeapState->state to an atomic
@ 2026-07-09 18:38  Nathan Bossart <[email protected]>
  0 siblings, 0 replies; 167+ messages in thread

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

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

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


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



^ permalink  raw  reply  [nested|flat] 167+ messages in thread

* [PATCH v1 2/8] convert ParallelBitmapHeapState->state to an atomic
@ 2026-07-09 18:38  Nathan Bossart <[email protected]>
  0 siblings, 0 replies; 167+ messages in thread

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

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

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


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



^ permalink  raw  reply  [nested|flat] 167+ messages in thread

* [PATCH v1 2/8] convert ParallelBitmapHeapState->state to an atomic
@ 2026-07-09 18:38  Nathan Bossart <[email protected]>
  0 siblings, 0 replies; 167+ messages in thread

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

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

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


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



^ permalink  raw  reply  [nested|flat] 167+ messages in thread

* [PATCH v1 2/8] convert ParallelBitmapHeapState->state to an atomic
@ 2026-07-09 18:38  Nathan Bossart <[email protected]>
  0 siblings, 0 replies; 167+ messages in thread

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

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

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


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



^ permalink  raw  reply  [nested|flat] 167+ messages in thread

* [PATCH v1 2/8] convert ParallelBitmapHeapState->state to an atomic
@ 2026-07-09 18:38  Nathan Bossart <[email protected]>
  0 siblings, 0 replies; 167+ messages in thread

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

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

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


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



^ permalink  raw  reply  [nested|flat] 167+ messages in thread

* [PATCH v1 2/8] convert ParallelBitmapHeapState->state to an atomic
@ 2026-07-09 18:38  Nathan Bossart <[email protected]>
  0 siblings, 0 replies; 167+ messages in thread

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

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

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


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



^ permalink  raw  reply  [nested|flat] 167+ messages in thread

* [PATCH v1 2/8] convert ParallelBitmapHeapState->state to an atomic
@ 2026-07-09 18:38  Nathan Bossart <[email protected]>
  0 siblings, 0 replies; 167+ messages in thread

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

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

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


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



^ permalink  raw  reply  [nested|flat] 167+ messages in thread

* [PATCH v1 2/8] convert ParallelBitmapHeapState->state to an atomic
@ 2026-07-09 18:38  Nathan Bossart <[email protected]>
  0 siblings, 0 replies; 167+ messages in thread

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

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

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


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



^ permalink  raw  reply  [nested|flat] 167+ messages in thread

* [PATCH v1 2/8] convert ParallelBitmapHeapState->state to an atomic
@ 2026-07-09 18:38  Nathan Bossart <[email protected]>
  0 siblings, 0 replies; 167+ messages in thread

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

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

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


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



^ permalink  raw  reply  [nested|flat] 167+ messages in thread

* [PATCH v1 2/8] convert ParallelBitmapHeapState->state to an atomic
@ 2026-07-09 18:38  Nathan Bossart <[email protected]>
  0 siblings, 0 replies; 167+ messages in thread

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

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

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


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



^ permalink  raw  reply  [nested|flat] 167+ messages in thread

* [PATCH v1 2/8] convert ParallelBitmapHeapState->state to an atomic
@ 2026-07-09 18:38  Nathan Bossart <[email protected]>
  0 siblings, 0 replies; 167+ messages in thread

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

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

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


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



^ permalink  raw  reply  [nested|flat] 167+ messages in thread

* [PATCH v1 2/8] convert ParallelBitmapHeapState->state to an atomic
@ 2026-07-09 18:38  Nathan Bossart <[email protected]>
  0 siblings, 0 replies; 167+ messages in thread

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

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

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


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



^ permalink  raw  reply  [nested|flat] 167+ messages in thread

* [PATCH v1 2/8] convert ParallelBitmapHeapState->state to an atomic
@ 2026-07-09 18:38  Nathan Bossart <[email protected]>
  0 siblings, 0 replies; 167+ messages in thread

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

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

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


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



^ permalink  raw  reply  [nested|flat] 167+ messages in thread

* [PATCH v1 2/8] convert ParallelBitmapHeapState->state to an atomic
@ 2026-07-09 18:38  Nathan Bossart <[email protected]>
  0 siblings, 0 replies; 167+ messages in thread

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

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

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


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



^ permalink  raw  reply  [nested|flat] 167+ messages in thread

* [PATCH v1 2/8] convert ParallelBitmapHeapState->state to an atomic
@ 2026-07-09 18:38  Nathan Bossart <[email protected]>
  0 siblings, 0 replies; 167+ messages in thread

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

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

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


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



^ permalink  raw  reply  [nested|flat] 167+ messages in thread

* [PATCH v1 2/8] convert ParallelBitmapHeapState->state to an atomic
@ 2026-07-09 18:38  Nathan Bossart <[email protected]>
  0 siblings, 0 replies; 167+ messages in thread

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

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

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


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



^ permalink  raw  reply  [nested|flat] 167+ messages in thread

* [PATCH v1 2/8] convert ParallelBitmapHeapState->state to an atomic
@ 2026-07-09 18:38  Nathan Bossart <[email protected]>
  0 siblings, 0 replies; 167+ messages in thread

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

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

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


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



^ permalink  raw  reply  [nested|flat] 167+ messages in thread

* [PATCH v1 2/8] convert ParallelBitmapHeapState->state to an atomic
@ 2026-07-09 18:38  Nathan Bossart <[email protected]>
  0 siblings, 0 replies; 167+ messages in thread

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

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

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


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



^ permalink  raw  reply  [nested|flat] 167+ messages in thread

* [PATCH v1 2/8] convert ParallelBitmapHeapState->state to an atomic
@ 2026-07-09 18:38  Nathan Bossart <[email protected]>
  0 siblings, 0 replies; 167+ messages in thread

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

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

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


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



^ permalink  raw  reply  [nested|flat] 167+ messages in thread

* [PATCH v1 2/8] convert ParallelBitmapHeapState->state to an atomic
@ 2026-07-09 18:38  Nathan Bossart <[email protected]>
  0 siblings, 0 replies; 167+ messages in thread

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

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

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


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



^ permalink  raw  reply  [nested|flat] 167+ messages in thread

* [PATCH v1 2/8] convert ParallelBitmapHeapState->state to an atomic
@ 2026-07-09 18:38  Nathan Bossart <[email protected]>
  0 siblings, 0 replies; 167+ messages in thread

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

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

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


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



^ permalink  raw  reply  [nested|flat] 167+ messages in thread

* [PATCH v1 2/8] convert ParallelBitmapHeapState->state to an atomic
@ 2026-07-09 18:38  Nathan Bossart <[email protected]>
  0 siblings, 0 replies; 167+ messages in thread

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

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

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


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



^ permalink  raw  reply  [nested|flat] 167+ messages in thread

* [PATCH v1 2/8] convert ParallelBitmapHeapState->state to an atomic
@ 2026-07-09 18:38  Nathan Bossart <[email protected]>
  0 siblings, 0 replies; 167+ messages in thread

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

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

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


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



^ permalink  raw  reply  [nested|flat] 167+ messages in thread

* [PATCH v1 2/8] convert ParallelBitmapHeapState->state to an atomic
@ 2026-07-09 18:38  Nathan Bossart <[email protected]>
  0 siblings, 0 replies; 167+ messages in thread

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

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

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


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



^ permalink  raw  reply  [nested|flat] 167+ messages in thread

* [PATCH v1 2/8] convert ParallelBitmapHeapState->state to an atomic
@ 2026-07-09 18:38  Nathan Bossart <[email protected]>
  0 siblings, 0 replies; 167+ messages in thread

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

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

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


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



^ permalink  raw  reply  [nested|flat] 167+ messages in thread

* [PATCH v1 2/8] convert ParallelBitmapHeapState->state to an atomic
@ 2026-07-09 18:38  Nathan Bossart <[email protected]>
  0 siblings, 0 replies; 167+ messages in thread

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

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

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


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



^ permalink  raw  reply  [nested|flat] 167+ messages in thread

* [PATCH v1 2/8] convert ParallelBitmapHeapState->state to an atomic
@ 2026-07-09 18:38  Nathan Bossart <[email protected]>
  0 siblings, 0 replies; 167+ messages in thread

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

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

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


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



^ permalink  raw  reply  [nested|flat] 167+ messages in thread

* [PATCH v1 2/8] convert ParallelBitmapHeapState->state to an atomic
@ 2026-07-09 18:38  Nathan Bossart <[email protected]>
  0 siblings, 0 replies; 167+ messages in thread

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

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

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


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



^ permalink  raw  reply  [nested|flat] 167+ messages in thread

* [PATCH v1 2/8] convert ParallelBitmapHeapState->state to an atomic
@ 2026-07-09 18:38  Nathan Bossart <[email protected]>
  0 siblings, 0 replies; 167+ messages in thread

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

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

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


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



^ permalink  raw  reply  [nested|flat] 167+ messages in thread

* [PATCH v1 2/8] convert ParallelBitmapHeapState->state to an atomic
@ 2026-07-09 18:38  Nathan Bossart <[email protected]>
  0 siblings, 0 replies; 167+ messages in thread

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

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

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


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



^ permalink  raw  reply  [nested|flat] 167+ messages in thread

* [PATCH v1 2/8] convert ParallelBitmapHeapState->state to an atomic
@ 2026-07-09 18:38  Nathan Bossart <[email protected]>
  0 siblings, 0 replies; 167+ messages in thread

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

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

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


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



^ permalink  raw  reply  [nested|flat] 167+ messages in thread

* [PATCH v1 2/8] convert ParallelBitmapHeapState->state to an atomic
@ 2026-07-09 18:38  Nathan Bossart <[email protected]>
  0 siblings, 0 replies; 167+ messages in thread

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

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

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


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



^ permalink  raw  reply  [nested|flat] 167+ messages in thread

* [PATCH v1 2/8] convert ParallelBitmapHeapState->state to an atomic
@ 2026-07-09 18:38  Nathan Bossart <[email protected]>
  0 siblings, 0 replies; 167+ messages in thread

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

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

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


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



^ permalink  raw  reply  [nested|flat] 167+ messages in thread

* [PATCH v1 2/8] convert ParallelBitmapHeapState->state to an atomic
@ 2026-07-09 18:38  Nathan Bossart <[email protected]>
  0 siblings, 0 replies; 167+ messages in thread

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

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

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


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



^ permalink  raw  reply  [nested|flat] 167+ messages in thread

* [PATCH v1 2/8] convert ParallelBitmapHeapState->state to an atomic
@ 2026-07-09 18:38  Nathan Bossart <[email protected]>
  0 siblings, 0 replies; 167+ messages in thread

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

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

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


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



^ permalink  raw  reply  [nested|flat] 167+ messages in thread

* [PATCH v1 2/8] convert ParallelBitmapHeapState->state to an atomic
@ 2026-07-09 18:38  Nathan Bossart <[email protected]>
  0 siblings, 0 replies; 167+ messages in thread

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

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

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


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



^ permalink  raw  reply  [nested|flat] 167+ messages in thread

* [PATCH v1 2/8] convert ParallelBitmapHeapState->state to an atomic
@ 2026-07-09 18:38  Nathan Bossart <[email protected]>
  0 siblings, 0 replies; 167+ messages in thread

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

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

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


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



^ permalink  raw  reply  [nested|flat] 167+ messages in thread

* [PATCH v1 2/8] convert ParallelBitmapHeapState->state to an atomic
@ 2026-07-09 18:38  Nathan Bossart <[email protected]>
  0 siblings, 0 replies; 167+ messages in thread

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

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

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


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



^ permalink  raw  reply  [nested|flat] 167+ messages in thread

* [PATCH v1 2/8] convert ParallelBitmapHeapState->state to an atomic
@ 2026-07-09 18:38  Nathan Bossart <[email protected]>
  0 siblings, 0 replies; 167+ messages in thread

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

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

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


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



^ permalink  raw  reply  [nested|flat] 167+ messages in thread

* [PATCH v1 2/8] convert ParallelBitmapHeapState->state to an atomic
@ 2026-07-09 18:38  Nathan Bossart <[email protected]>
  0 siblings, 0 replies; 167+ messages in thread

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

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

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


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



^ permalink  raw  reply  [nested|flat] 167+ messages in thread

* [PATCH v1 2/8] convert ParallelBitmapHeapState->state to an atomic
@ 2026-07-09 18:38  Nathan Bossart <[email protected]>
  0 siblings, 0 replies; 167+ messages in thread

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

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

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


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



^ permalink  raw  reply  [nested|flat] 167+ messages in thread

* [PATCH v1 2/8] convert ParallelBitmapHeapState->state to an atomic
@ 2026-07-09 18:38  Nathan Bossart <[email protected]>
  0 siblings, 0 replies; 167+ messages in thread

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

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

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


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



^ permalink  raw  reply  [nested|flat] 167+ messages in thread

* [PATCH v1 2/8] convert ParallelBitmapHeapState->state to an atomic
@ 2026-07-09 18:38  Nathan Bossart <[email protected]>
  0 siblings, 0 replies; 167+ messages in thread

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

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

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


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



^ permalink  raw  reply  [nested|flat] 167+ messages in thread

* [PATCH v1 2/8] convert ParallelBitmapHeapState->state to an atomic
@ 2026-07-09 18:38  Nathan Bossart <[email protected]>
  0 siblings, 0 replies; 167+ messages in thread

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

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

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


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



^ permalink  raw  reply  [nested|flat] 167+ messages in thread

* [PATCH v1 2/8] convert ParallelBitmapHeapState->state to an atomic
@ 2026-07-09 18:38  Nathan Bossart <[email protected]>
  0 siblings, 0 replies; 167+ messages in thread

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

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

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


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



^ permalink  raw  reply  [nested|flat] 167+ messages in thread

* [PATCH v1 2/8] convert ParallelBitmapHeapState->state to an atomic
@ 2026-07-09 18:38  Nathan Bossart <[email protected]>
  0 siblings, 0 replies; 167+ messages in thread

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

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

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


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



^ permalink  raw  reply  [nested|flat] 167+ messages in thread

* [PATCH v1 2/8] convert ParallelBitmapHeapState->state to an atomic
@ 2026-07-09 18:38  Nathan Bossart <[email protected]>
  0 siblings, 0 replies; 167+ messages in thread

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

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

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


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



^ permalink  raw  reply  [nested|flat] 167+ messages in thread

* [PATCH v1 2/8] convert ParallelBitmapHeapState->state to an atomic
@ 2026-07-09 18:38  Nathan Bossart <[email protected]>
  0 siblings, 0 replies; 167+ messages in thread

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

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

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


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



^ permalink  raw  reply  [nested|flat] 167+ messages in thread

* [PATCH v1 2/8] convert ParallelBitmapHeapState->state to an atomic
@ 2026-07-09 18:38  Nathan Bossart <[email protected]>
  0 siblings, 0 replies; 167+ messages in thread

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

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

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


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



^ permalink  raw  reply  [nested|flat] 167+ messages in thread

* [PATCH v1 2/8] convert ParallelBitmapHeapState->state to an atomic
@ 2026-07-09 18:38  Nathan Bossart <[email protected]>
  0 siblings, 0 replies; 167+ messages in thread

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

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

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


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



^ permalink  raw  reply  [nested|flat] 167+ messages in thread

* [PATCH v1 2/8] convert ParallelBitmapHeapState->state to an atomic
@ 2026-07-09 18:38  Nathan Bossart <[email protected]>
  0 siblings, 0 replies; 167+ messages in thread

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

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

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


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



^ permalink  raw  reply  [nested|flat] 167+ messages in thread

* [PATCH v1 2/8] convert ParallelBitmapHeapState->state to an atomic
@ 2026-07-09 18:38  Nathan Bossart <[email protected]>
  0 siblings, 0 replies; 167+ messages in thread

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

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

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


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



^ permalink  raw  reply  [nested|flat] 167+ messages in thread

* [PATCH v1 2/8] convert ParallelBitmapHeapState->state to an atomic
@ 2026-07-09 18:38  Nathan Bossart <[email protected]>
  0 siblings, 0 replies; 167+ messages in thread

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

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

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


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



^ permalink  raw  reply  [nested|flat] 167+ messages in thread

* [PATCH v1 2/8] convert ParallelBitmapHeapState->state to an atomic
@ 2026-07-09 18:38  Nathan Bossart <[email protected]>
  0 siblings, 0 replies; 167+ messages in thread

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

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

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


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



^ permalink  raw  reply  [nested|flat] 167+ messages in thread

* [PATCH v1 2/8] convert ParallelBitmapHeapState->state to an atomic
@ 2026-07-09 18:38  Nathan Bossart <[email protected]>
  0 siblings, 0 replies; 167+ messages in thread

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

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

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


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



^ permalink  raw  reply  [nested|flat] 167+ messages in thread

* [PATCH v1 2/8] convert ParallelBitmapHeapState->state to an atomic
@ 2026-07-09 18:38  Nathan Bossart <[email protected]>
  0 siblings, 0 replies; 167+ messages in thread

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

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

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


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



^ permalink  raw  reply  [nested|flat] 167+ messages in thread

* [PATCH v1 2/8] convert ParallelBitmapHeapState->state to an atomic
@ 2026-07-09 18:38  Nathan Bossart <[email protected]>
  0 siblings, 0 replies; 167+ messages in thread

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

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

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


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



^ permalink  raw  reply  [nested|flat] 167+ messages in thread

* [PATCH v1 2/8] convert ParallelBitmapHeapState->state to an atomic
@ 2026-07-09 18:38  Nathan Bossart <[email protected]>
  0 siblings, 0 replies; 167+ messages in thread

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

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

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


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



^ permalink  raw  reply  [nested|flat] 167+ messages in thread

* [PATCH v1 2/8] convert ParallelBitmapHeapState->state to an atomic
@ 2026-07-09 18:38  Nathan Bossart <[email protected]>
  0 siblings, 0 replies; 167+ messages in thread

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

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

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


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



^ permalink  raw  reply  [nested|flat] 167+ messages in thread

* [PATCH v1 2/8] convert ParallelBitmapHeapState->state to an atomic
@ 2026-07-09 18:38  Nathan Bossart <[email protected]>
  0 siblings, 0 replies; 167+ messages in thread

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

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

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


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



^ permalink  raw  reply  [nested|flat] 167+ messages in thread

* [PATCH v1 2/8] convert ParallelBitmapHeapState->state to an atomic
@ 2026-07-09 18:38  Nathan Bossart <[email protected]>
  0 siblings, 0 replies; 167+ messages in thread

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

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

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


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



^ permalink  raw  reply  [nested|flat] 167+ messages in thread

* [PATCH v1 2/8] convert ParallelBitmapHeapState->state to an atomic
@ 2026-07-09 18:38  Nathan Bossart <[email protected]>
  0 siblings, 0 replies; 167+ messages in thread

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

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

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


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



^ permalink  raw  reply  [nested|flat] 167+ messages in thread

* [PATCH v1 2/8] convert ParallelBitmapHeapState->state to an atomic
@ 2026-07-09 18:38  Nathan Bossart <[email protected]>
  0 siblings, 0 replies; 167+ messages in thread

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

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

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


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



^ permalink  raw  reply  [nested|flat] 167+ messages in thread

* [PATCH v1 2/8] convert ParallelBitmapHeapState->state to an atomic
@ 2026-07-09 18:38  Nathan Bossart <[email protected]>
  0 siblings, 0 replies; 167+ messages in thread

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

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

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


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



^ permalink  raw  reply  [nested|flat] 167+ messages in thread

* [PATCH v1 2/8] convert ParallelBitmapHeapState->state to an atomic
@ 2026-07-09 18:38  Nathan Bossart <[email protected]>
  0 siblings, 0 replies; 167+ messages in thread

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

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

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


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



^ permalink  raw  reply  [nested|flat] 167+ messages in thread

* [PATCH v1 2/8] convert ParallelBitmapHeapState->state to an atomic
@ 2026-07-09 18:38  Nathan Bossart <[email protected]>
  0 siblings, 0 replies; 167+ messages in thread

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

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

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


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



^ permalink  raw  reply  [nested|flat] 167+ messages in thread

* [PATCH v1 2/8] convert ParallelBitmapHeapState->state to an atomic
@ 2026-07-09 18:38  Nathan Bossart <[email protected]>
  0 siblings, 0 replies; 167+ messages in thread

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

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

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


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



^ permalink  raw  reply  [nested|flat] 167+ messages in thread

* [PATCH v1 2/8] convert ParallelBitmapHeapState->state to an atomic
@ 2026-07-09 18:38  Nathan Bossart <[email protected]>
  0 siblings, 0 replies; 167+ messages in thread

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

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

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


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



^ permalink  raw  reply  [nested|flat] 167+ messages in thread

* [PATCH v1 2/8] convert ParallelBitmapHeapState->state to an atomic
@ 2026-07-09 18:38  Nathan Bossart <[email protected]>
  0 siblings, 0 replies; 167+ messages in thread

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

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

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


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



^ permalink  raw  reply  [nested|flat] 167+ messages in thread

* [PATCH v1 2/8] convert ParallelBitmapHeapState->state to an atomic
@ 2026-07-09 18:38  Nathan Bossart <[email protected]>
  0 siblings, 0 replies; 167+ messages in thread

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

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

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


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



^ permalink  raw  reply  [nested|flat] 167+ messages in thread

* [PATCH v1 2/8] convert ParallelBitmapHeapState->state to an atomic
@ 2026-07-09 18:38  Nathan Bossart <[email protected]>
  0 siblings, 0 replies; 167+ messages in thread

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

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

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


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



^ permalink  raw  reply  [nested|flat] 167+ messages in thread

* [PATCH v1 2/8] convert ParallelBitmapHeapState->state to an atomic
@ 2026-07-09 18:38  Nathan Bossart <[email protected]>
  0 siblings, 0 replies; 167+ messages in thread

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

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

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


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



^ permalink  raw  reply  [nested|flat] 167+ messages in thread

* [PATCH v1 2/8] convert ParallelBitmapHeapState->state to an atomic
@ 2026-07-09 18:38  Nathan Bossart <[email protected]>
  0 siblings, 0 replies; 167+ messages in thread

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

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

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


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



^ permalink  raw  reply  [nested|flat] 167+ messages in thread

* [PATCH v1 2/8] convert ParallelBitmapHeapState->state to an atomic
@ 2026-07-09 18:38  Nathan Bossart <[email protected]>
  0 siblings, 0 replies; 167+ messages in thread

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

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

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


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



^ permalink  raw  reply  [nested|flat] 167+ messages in thread

* [PATCH v1 2/8] convert ParallelBitmapHeapState->state to an atomic
@ 2026-07-09 18:38  Nathan Bossart <[email protected]>
  0 siblings, 0 replies; 167+ messages in thread

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

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

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


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



^ permalink  raw  reply  [nested|flat] 167+ messages in thread

* [PATCH v1 2/8] convert ParallelBitmapHeapState->state to an atomic
@ 2026-07-09 18:38  Nathan Bossart <[email protected]>
  0 siblings, 0 replies; 167+ messages in thread

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

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

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


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



^ permalink  raw  reply  [nested|flat] 167+ messages in thread

* [PATCH v1 2/8] convert ParallelBitmapHeapState->state to an atomic
@ 2026-07-09 18:38  Nathan Bossart <[email protected]>
  0 siblings, 0 replies; 167+ messages in thread

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

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

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


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



^ permalink  raw  reply  [nested|flat] 167+ messages in thread

* [PATCH v1 2/8] convert ParallelBitmapHeapState->state to an atomic
@ 2026-07-09 18:38  Nathan Bossart <[email protected]>
  0 siblings, 0 replies; 167+ messages in thread

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

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

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


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



^ permalink  raw  reply  [nested|flat] 167+ messages in thread

* [PATCH v1 2/8] convert ParallelBitmapHeapState->state to an atomic
@ 2026-07-09 18:38  Nathan Bossart <[email protected]>
  0 siblings, 0 replies; 167+ messages in thread

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

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

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


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



^ permalink  raw  reply  [nested|flat] 167+ messages in thread

* [PATCH v1 2/8] convert ParallelBitmapHeapState->state to an atomic
@ 2026-07-09 18:38  Nathan Bossart <[email protected]>
  0 siblings, 0 replies; 167+ messages in thread

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

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

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


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



^ permalink  raw  reply  [nested|flat] 167+ messages in thread

* [PATCH v1 2/8] convert ParallelBitmapHeapState->state to an atomic
@ 2026-07-09 18:38  Nathan Bossart <[email protected]>
  0 siblings, 0 replies; 167+ messages in thread

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

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

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


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



^ permalink  raw  reply  [nested|flat] 167+ messages in thread

* [PATCH v1 2/8] convert ParallelBitmapHeapState->state to an atomic
@ 2026-07-09 18:38  Nathan Bossart <[email protected]>
  0 siblings, 0 replies; 167+ messages in thread

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

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

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


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



^ permalink  raw  reply  [nested|flat] 167+ messages in thread

* [PATCH v1 2/8] convert ParallelBitmapHeapState->state to an atomic
@ 2026-07-09 18:38  Nathan Bossart <[email protected]>
  0 siblings, 0 replies; 167+ messages in thread

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

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

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


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



^ permalink  raw  reply  [nested|flat] 167+ messages in thread

* [PATCH v1 2/8] convert ParallelBitmapHeapState->state to an atomic
@ 2026-07-09 18:38  Nathan Bossart <[email protected]>
  0 siblings, 0 replies; 167+ messages in thread

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

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

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


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



^ permalink  raw  reply  [nested|flat] 167+ messages in thread

* [PATCH v1 2/8] convert ParallelBitmapHeapState->state to an atomic
@ 2026-07-09 18:38  Nathan Bossart <[email protected]>
  0 siblings, 0 replies; 167+ messages in thread

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

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

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


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



^ permalink  raw  reply  [nested|flat] 167+ messages in thread

* [PATCH v1 2/8] convert ParallelBitmapHeapState->state to an atomic
@ 2026-07-09 18:38  Nathan Bossart <[email protected]>
  0 siblings, 0 replies; 167+ messages in thread

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

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

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


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



^ permalink  raw  reply  [nested|flat] 167+ messages in thread

* [PATCH v1 2/8] convert ParallelBitmapHeapState->state to an atomic
@ 2026-07-09 18:38  Nathan Bossart <[email protected]>
  0 siblings, 0 replies; 167+ messages in thread

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

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

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


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



^ permalink  raw  reply  [nested|flat] 167+ messages in thread

* [PATCH v1 2/8] convert ParallelBitmapHeapState->state to an atomic
@ 2026-07-09 18:38  Nathan Bossart <[email protected]>
  0 siblings, 0 replies; 167+ messages in thread

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

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

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


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



^ permalink  raw  reply  [nested|flat] 167+ messages in thread

* [PATCH v1 2/8] convert ParallelBitmapHeapState->state to an atomic
@ 2026-07-09 18:38  Nathan Bossart <[email protected]>
  0 siblings, 0 replies; 167+ messages in thread

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

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

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


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



^ permalink  raw  reply  [nested|flat] 167+ messages in thread

* [PATCH v1 2/8] convert ParallelBitmapHeapState->state to an atomic
@ 2026-07-09 18:38  Nathan Bossart <[email protected]>
  0 siblings, 0 replies; 167+ messages in thread

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

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

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


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



^ permalink  raw  reply  [nested|flat] 167+ messages in thread

* [PATCH v1 2/8] convert ParallelBitmapHeapState->state to an atomic
@ 2026-07-09 18:38  Nathan Bossart <[email protected]>
  0 siblings, 0 replies; 167+ messages in thread

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

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

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


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



^ permalink  raw  reply  [nested|flat] 167+ messages in thread

* [PATCH v1 2/8] convert ParallelBitmapHeapState->state to an atomic
@ 2026-07-09 18:38  Nathan Bossart <[email protected]>
  0 siblings, 0 replies; 167+ messages in thread

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

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

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


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



^ permalink  raw  reply  [nested|flat] 167+ messages in thread

* [PATCH v1 2/8] convert ParallelBitmapHeapState->state to an atomic
@ 2026-07-09 18:38  Nathan Bossart <[email protected]>
  0 siblings, 0 replies; 167+ messages in thread

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

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

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


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



^ permalink  raw  reply  [nested|flat] 167+ messages in thread

* [PATCH v1 2/8] convert ParallelBitmapHeapState->state to an atomic
@ 2026-07-09 18:38  Nathan Bossart <[email protected]>
  0 siblings, 0 replies; 167+ messages in thread

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

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

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


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



^ permalink  raw  reply  [nested|flat] 167+ messages in thread

* [PATCH v1 2/8] convert ParallelBitmapHeapState->state to an atomic
@ 2026-07-09 18:38  Nathan Bossart <[email protected]>
  0 siblings, 0 replies; 167+ messages in thread

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

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

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


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



^ permalink  raw  reply  [nested|flat] 167+ messages in thread

* [PATCH v1 2/8] convert ParallelBitmapHeapState->state to an atomic
@ 2026-07-09 18:38  Nathan Bossart <[email protected]>
  0 siblings, 0 replies; 167+ messages in thread

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

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

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


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



^ permalink  raw  reply  [nested|flat] 167+ messages in thread

* [PATCH v1 2/8] convert ParallelBitmapHeapState->state to an atomic
@ 2026-07-09 18:38  Nathan Bossart <[email protected]>
  0 siblings, 0 replies; 167+ messages in thread

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

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

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


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



^ permalink  raw  reply  [nested|flat] 167+ messages in thread

* [PATCH v1 2/8] convert ParallelBitmapHeapState->state to an atomic
@ 2026-07-09 18:38  Nathan Bossart <[email protected]>
  0 siblings, 0 replies; 167+ messages in thread

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

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

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


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



^ permalink  raw  reply  [nested|flat] 167+ messages in thread

* [PATCH v1 2/8] convert ParallelBitmapHeapState->state to an atomic
@ 2026-07-09 18:38  Nathan Bossart <[email protected]>
  0 siblings, 0 replies; 167+ messages in thread

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

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

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


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



^ permalink  raw  reply  [nested|flat] 167+ messages in thread

* [PATCH v1 2/8] convert ParallelBitmapHeapState->state to an atomic
@ 2026-07-09 18:38  Nathan Bossart <[email protected]>
  0 siblings, 0 replies; 167+ messages in thread

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

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

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


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



^ permalink  raw  reply  [nested|flat] 167+ messages in thread

* [PATCH v1 2/8] convert ParallelBitmapHeapState->state to an atomic
@ 2026-07-09 18:38  Nathan Bossart <[email protected]>
  0 siblings, 0 replies; 167+ messages in thread

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

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

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


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



^ permalink  raw  reply  [nested|flat] 167+ messages in thread

* [PATCH v1 2/8] convert ParallelBitmapHeapState->state to an atomic
@ 2026-07-09 18:38  Nathan Bossart <[email protected]>
  0 siblings, 0 replies; 167+ messages in thread

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

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

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


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



^ permalink  raw  reply  [nested|flat] 167+ messages in thread

* [PATCH v1 2/8] convert ParallelBitmapHeapState->state to an atomic
@ 2026-07-09 18:38  Nathan Bossart <[email protected]>
  0 siblings, 0 replies; 167+ messages in thread

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

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

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


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



^ permalink  raw  reply  [nested|flat] 167+ messages in thread

* [PATCH v1 2/8] convert ParallelBitmapHeapState->state to an atomic
@ 2026-07-09 18:38  Nathan Bossart <[email protected]>
  0 siblings, 0 replies; 167+ messages in thread

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

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

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


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



^ permalink  raw  reply  [nested|flat] 167+ messages in thread

* [PATCH v1 2/8] convert ParallelBitmapHeapState->state to an atomic
@ 2026-07-09 18:38  Nathan Bossart <[email protected]>
  0 siblings, 0 replies; 167+ messages in thread

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

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

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


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



^ permalink  raw  reply  [nested|flat] 167+ messages in thread

* [PATCH v1 2/8] convert ParallelBitmapHeapState->state to an atomic
@ 2026-07-09 18:38  Nathan Bossart <[email protected]>
  0 siblings, 0 replies; 167+ messages in thread

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

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

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


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



^ permalink  raw  reply  [nested|flat] 167+ messages in thread

* [PATCH v1 2/8] convert ParallelBitmapHeapState->state to an atomic
@ 2026-07-09 18:38  Nathan Bossart <[email protected]>
  0 siblings, 0 replies; 167+ messages in thread

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

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

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


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



^ permalink  raw  reply  [nested|flat] 167+ messages in thread

* [PATCH v1 2/8] convert ParallelBitmapHeapState->state to an atomic
@ 2026-07-09 18:38  Nathan Bossart <[email protected]>
  0 siblings, 0 replies; 167+ messages in thread

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

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

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


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



^ permalink  raw  reply  [nested|flat] 167+ messages in thread

* [PATCH v1 2/8] convert ParallelBitmapHeapState->state to an atomic
@ 2026-07-09 18:38  Nathan Bossart <[email protected]>
  0 siblings, 0 replies; 167+ messages in thread

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

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

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


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



^ permalink  raw  reply  [nested|flat] 167+ messages in thread

* [PATCH v1 2/8] convert ParallelBitmapHeapState->state to an atomic
@ 2026-07-09 18:38  Nathan Bossart <[email protected]>
  0 siblings, 0 replies; 167+ messages in thread

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

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

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


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



^ permalink  raw  reply  [nested|flat] 167+ messages in thread

* [PATCH v1 2/8] convert ParallelBitmapHeapState->state to an atomic
@ 2026-07-09 18:38  Nathan Bossart <[email protected]>
  0 siblings, 0 replies; 167+ messages in thread

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

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

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


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



^ permalink  raw  reply  [nested|flat] 167+ messages in thread

* [PATCH v1 2/8] convert ParallelBitmapHeapState->state to an atomic
@ 2026-07-09 18:38  Nathan Bossart <[email protected]>
  0 siblings, 0 replies; 167+ messages in thread

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

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

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


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



^ permalink  raw  reply  [nested|flat] 167+ messages in thread

* [PATCH v1 2/8] convert ParallelBitmapHeapState->state to an atomic
@ 2026-07-09 18:38  Nathan Bossart <[email protected]>
  0 siblings, 0 replies; 167+ messages in thread

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

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

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


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



^ permalink  raw  reply  [nested|flat] 167+ messages in thread

* [PATCH v1 2/8] convert ParallelBitmapHeapState->state to an atomic
@ 2026-07-09 18:38  Nathan Bossart <[email protected]>
  0 siblings, 0 replies; 167+ messages in thread

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

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

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


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



^ permalink  raw  reply  [nested|flat] 167+ messages in thread

* [PATCH v1 2/8] convert ParallelBitmapHeapState->state to an atomic
@ 2026-07-09 18:38  Nathan Bossart <[email protected]>
  0 siblings, 0 replies; 167+ messages in thread

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

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

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


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



^ permalink  raw  reply  [nested|flat] 167+ messages in thread

* [PATCH v1 2/8] convert ParallelBitmapHeapState->state to an atomic
@ 2026-07-09 18:38  Nathan Bossart <[email protected]>
  0 siblings, 0 replies; 167+ messages in thread

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

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

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


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



^ permalink  raw  reply  [nested|flat] 167+ messages in thread

* [PATCH v1 2/8] convert ParallelBitmapHeapState->state to an atomic
@ 2026-07-09 18:38  Nathan Bossart <[email protected]>
  0 siblings, 0 replies; 167+ messages in thread

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

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

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


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



^ permalink  raw  reply  [nested|flat] 167+ messages in thread

* [PATCH v1 2/8] convert ParallelBitmapHeapState->state to an atomic
@ 2026-07-09 18:38  Nathan Bossart <[email protected]>
  0 siblings, 0 replies; 167+ messages in thread

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

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

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


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



^ permalink  raw  reply  [nested|flat] 167+ messages in thread

* [PATCH v1 2/8] convert ParallelBitmapHeapState->state to an atomic
@ 2026-07-09 18:38  Nathan Bossart <[email protected]>
  0 siblings, 0 replies; 167+ messages in thread

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

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

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


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



^ permalink  raw  reply  [nested|flat] 167+ messages in thread

* [PATCH v1 2/8] convert ParallelBitmapHeapState->state to an atomic
@ 2026-07-09 18:38  Nathan Bossart <[email protected]>
  0 siblings, 0 replies; 167+ messages in thread

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

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

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


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



^ permalink  raw  reply  [nested|flat] 167+ messages in thread

* [PATCH v1 2/8] convert ParallelBitmapHeapState->state to an atomic
@ 2026-07-09 18:38  Nathan Bossart <[email protected]>
  0 siblings, 0 replies; 167+ messages in thread

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

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

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


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



^ permalink  raw  reply  [nested|flat] 167+ messages in thread

* [PATCH v1 2/8] convert ParallelBitmapHeapState->state to an atomic
@ 2026-07-09 18:38  Nathan Bossart <[email protected]>
  0 siblings, 0 replies; 167+ messages in thread

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

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

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


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



^ permalink  raw  reply  [nested|flat] 167+ messages in thread

* [PATCH v1 2/8] convert ParallelBitmapHeapState->state to an atomic
@ 2026-07-09 18:38  Nathan Bossart <[email protected]>
  0 siblings, 0 replies; 167+ messages in thread

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

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

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


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



^ permalink  raw  reply  [nested|flat] 167+ messages in thread

* [PATCH v1 2/8] convert ParallelBitmapHeapState->state to an atomic
@ 2026-07-09 18:38  Nathan Bossart <[email protected]>
  0 siblings, 0 replies; 167+ messages in thread

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

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

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


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



^ permalink  raw  reply  [nested|flat] 167+ messages in thread

* [PATCH v1 2/8] convert ParallelBitmapHeapState->state to an atomic
@ 2026-07-09 18:38  Nathan Bossart <[email protected]>
  0 siblings, 0 replies; 167+ messages in thread

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

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

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


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



^ permalink  raw  reply  [nested|flat] 167+ messages in thread

* [PATCH v1 2/8] convert ParallelBitmapHeapState->state to an atomic
@ 2026-07-09 18:38  Nathan Bossart <[email protected]>
  0 siblings, 0 replies; 167+ messages in thread

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

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

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


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



^ permalink  raw  reply  [nested|flat] 167+ messages in thread

* [PATCH v1 2/8] convert ParallelBitmapHeapState->state to an atomic
@ 2026-07-09 18:38  Nathan Bossart <[email protected]>
  0 siblings, 0 replies; 167+ messages in thread

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

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

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


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



^ permalink  raw  reply  [nested|flat] 167+ messages in thread

* [PATCH v1 2/8] convert ParallelBitmapHeapState->state to an atomic
@ 2026-07-09 18:38  Nathan Bossart <[email protected]>
  0 siblings, 0 replies; 167+ messages in thread

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

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

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


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



^ permalink  raw  reply  [nested|flat] 167+ messages in thread

* [PATCH v1 2/8] convert ParallelBitmapHeapState->state to an atomic
@ 2026-07-09 18:38  Nathan Bossart <[email protected]>
  0 siblings, 0 replies; 167+ messages in thread

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

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

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


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



^ permalink  raw  reply  [nested|flat] 167+ messages in thread

* [PATCH v1 2/8] convert ParallelBitmapHeapState->state to an atomic
@ 2026-07-09 18:38  Nathan Bossart <[email protected]>
  0 siblings, 0 replies; 167+ messages in thread

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

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

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


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



^ permalink  raw  reply  [nested|flat] 167+ messages in thread

* [PATCH v1 2/8] convert ParallelBitmapHeapState->state to an atomic
@ 2026-07-09 18:38  Nathan Bossart <[email protected]>
  0 siblings, 0 replies; 167+ messages in thread

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

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

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


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



^ permalink  raw  reply  [nested|flat] 167+ messages in thread

* [PATCH v1 2/8] convert ParallelBitmapHeapState->state to an atomic
@ 2026-07-09 18:38  Nathan Bossart <[email protected]>
  0 siblings, 0 replies; 167+ messages in thread

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

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

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


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



^ permalink  raw  reply  [nested|flat] 167+ messages in thread

* [PATCH v1 2/8] convert ParallelBitmapHeapState->state to an atomic
@ 2026-07-09 18:38  Nathan Bossart <[email protected]>
  0 siblings, 0 replies; 167+ messages in thread

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

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

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


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



^ permalink  raw  reply  [nested|flat] 167+ messages in thread

* [PATCH v1 2/8] convert ParallelBitmapHeapState->state to an atomic
@ 2026-07-09 18:38  Nathan Bossart <[email protected]>
  0 siblings, 0 replies; 167+ messages in thread

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

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

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


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



^ permalink  raw  reply  [nested|flat] 167+ messages in thread

* [PATCH v1 2/8] convert ParallelBitmapHeapState->state to an atomic
@ 2026-07-09 18:38  Nathan Bossart <[email protected]>
  0 siblings, 0 replies; 167+ messages in thread

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

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

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


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



^ permalink  raw  reply  [nested|flat] 167+ messages in thread

* [PATCH v1 2/8] convert ParallelBitmapHeapState->state to an atomic
@ 2026-07-09 18:38  Nathan Bossart <[email protected]>
  0 siblings, 0 replies; 167+ messages in thread

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

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

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


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



^ permalink  raw  reply  [nested|flat] 167+ messages in thread

* [PATCH v1 2/8] convert ParallelBitmapHeapState->state to an atomic
@ 2026-07-09 18:38  Nathan Bossart <[email protected]>
  0 siblings, 0 replies; 167+ messages in thread

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

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

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


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



^ permalink  raw  reply  [nested|flat] 167+ messages in thread

* [PATCH v1 2/8] convert ParallelBitmapHeapState->state to an atomic
@ 2026-07-09 18:38  Nathan Bossart <[email protected]>
  0 siblings, 0 replies; 167+ messages in thread

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

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

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


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



^ permalink  raw  reply  [nested|flat] 167+ messages in thread

* [PATCH v1 2/8] convert ParallelBitmapHeapState->state to an atomic
@ 2026-07-09 18:38  Nathan Bossart <[email protected]>
  0 siblings, 0 replies; 167+ messages in thread

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

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

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


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



^ permalink  raw  reply  [nested|flat] 167+ messages in thread

* [PATCH v1 2/8] convert ParallelBitmapHeapState->state to an atomic
@ 2026-07-09 18:38  Nathan Bossart <[email protected]>
  0 siblings, 0 replies; 167+ messages in thread

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

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

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


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



^ permalink  raw  reply  [nested|flat] 167+ messages in thread

* [PATCH v1 2/8] convert ParallelBitmapHeapState->state to an atomic
@ 2026-07-09 18:38  Nathan Bossart <[email protected]>
  0 siblings, 0 replies; 167+ messages in thread

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

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

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


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



^ permalink  raw  reply  [nested|flat] 167+ messages in thread

* [PATCH v1 2/8] convert ParallelBitmapHeapState->state to an atomic
@ 2026-07-09 18:38  Nathan Bossart <[email protected]>
  0 siblings, 0 replies; 167+ messages in thread

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

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

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


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



^ permalink  raw  reply  [nested|flat] 167+ messages in thread

* [PATCH v1 2/8] convert ParallelBitmapHeapState->state to an atomic
@ 2026-07-09 18:38  Nathan Bossart <[email protected]>
  0 siblings, 0 replies; 167+ messages in thread

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

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

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


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



^ permalink  raw  reply  [nested|flat] 167+ messages in thread

* [PATCH v1 2/8] convert ParallelBitmapHeapState->state to an atomic
@ 2026-07-09 18:38  Nathan Bossart <[email protected]>
  0 siblings, 0 replies; 167+ messages in thread

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

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

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


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



^ permalink  raw  reply  [nested|flat] 167+ messages in thread

* [PATCH v1 2/8] convert ParallelBitmapHeapState->state to an atomic
@ 2026-07-09 18:38  Nathan Bossart <[email protected]>
  0 siblings, 0 replies; 167+ messages in thread

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

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

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


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



^ permalink  raw  reply  [nested|flat] 167+ messages in thread

* [PATCH v1 2/8] convert ParallelBitmapHeapState->state to an atomic
@ 2026-07-09 18:38  Nathan Bossart <[email protected]>
  0 siblings, 0 replies; 167+ messages in thread

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

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

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


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



^ permalink  raw  reply  [nested|flat] 167+ messages in thread

* [PATCH v1 2/8] convert ParallelBitmapHeapState->state to an atomic
@ 2026-07-09 18:38  Nathan Bossart <[email protected]>
  0 siblings, 0 replies; 167+ messages in thread

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

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

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


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



^ permalink  raw  reply  [nested|flat] 167+ messages in thread

* [PATCH v1 2/8] convert ParallelBitmapHeapState->state to an atomic
@ 2026-07-09 18:38  Nathan Bossart <[email protected]>
  0 siblings, 0 replies; 167+ messages in thread

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

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

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


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



^ permalink  raw  reply  [nested|flat] 167+ messages in thread

* [PATCH v1 2/8] convert ParallelBitmapHeapState->state to an atomic
@ 2026-07-09 18:38  Nathan Bossart <[email protected]>
  0 siblings, 0 replies; 167+ messages in thread

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

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

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


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



^ permalink  raw  reply  [nested|flat] 167+ messages in thread

* [PATCH v1 2/8] convert ParallelBitmapHeapState->state to an atomic
@ 2026-07-09 18:38  Nathan Bossart <[email protected]>
  0 siblings, 0 replies; 167+ messages in thread

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

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

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


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



^ permalink  raw  reply  [nested|flat] 167+ messages in thread

* [PATCH v1 2/8] convert ParallelBitmapHeapState->state to an atomic
@ 2026-07-09 18:38  Nathan Bossart <[email protected]>
  0 siblings, 0 replies; 167+ messages in thread

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

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

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


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



^ permalink  raw  reply  [nested|flat] 167+ messages in thread

* [PATCH v1 2/8] convert ParallelBitmapHeapState->state to an atomic
@ 2026-07-09 18:38  Nathan Bossart <[email protected]>
  0 siblings, 0 replies; 167+ messages in thread

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

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

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


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



^ permalink  raw  reply  [nested|flat] 167+ messages in thread

* [PATCH v1 2/8] convert ParallelBitmapHeapState->state to an atomic
@ 2026-07-09 18:38  Nathan Bossart <[email protected]>
  0 siblings, 0 replies; 167+ messages in thread

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

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

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


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



^ permalink  raw  reply  [nested|flat] 167+ messages in thread

* [PATCH v1 2/8] convert ParallelBitmapHeapState->state to an atomic
@ 2026-07-09 18:38  Nathan Bossart <[email protected]>
  0 siblings, 0 replies; 167+ messages in thread

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

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

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


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



^ permalink  raw  reply  [nested|flat] 167+ messages in thread

* [PATCH v1 2/8] convert ParallelBitmapHeapState->state to an atomic
@ 2026-07-09 18:38  Nathan Bossart <[email protected]>
  0 siblings, 0 replies; 167+ messages in thread

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

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

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


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



^ permalink  raw  reply  [nested|flat] 167+ messages in thread

* [PATCH v1 2/8] convert ParallelBitmapHeapState->state to an atomic
@ 2026-07-09 18:38  Nathan Bossart <[email protected]>
  0 siblings, 0 replies; 167+ messages in thread

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

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

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


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



^ permalink  raw  reply  [nested|flat] 167+ messages in thread

* [PATCH v1 2/8] convert ParallelBitmapHeapState->state to an atomic
@ 2026-07-09 18:38  Nathan Bossart <[email protected]>
  0 siblings, 0 replies; 167+ messages in thread

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

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

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


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



^ permalink  raw  reply  [nested|flat] 167+ messages in thread

* [PATCH v1 2/8] convert ParallelBitmapHeapState->state to an atomic
@ 2026-07-09 18:38  Nathan Bossart <[email protected]>
  0 siblings, 0 replies; 167+ messages in thread

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

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

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


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



^ permalink  raw  reply  [nested|flat] 167+ messages in thread

* [PATCH v1 2/8] convert ParallelBitmapHeapState->state to an atomic
@ 2026-07-09 18:38  Nathan Bossart <[email protected]>
  0 siblings, 0 replies; 167+ messages in thread

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

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

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


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



^ permalink  raw  reply  [nested|flat] 167+ messages in thread

* [PATCH v1 2/8] convert ParallelBitmapHeapState->state to an atomic
@ 2026-07-09 18:38  Nathan Bossart <[email protected]>
  0 siblings, 0 replies; 167+ messages in thread

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

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

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


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



^ permalink  raw  reply  [nested|flat] 167+ messages in thread

* [PATCH v1 2/8] convert ParallelBitmapHeapState->state to an atomic
@ 2026-07-09 18:38  Nathan Bossart <[email protected]>
  0 siblings, 0 replies; 167+ messages in thread

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

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

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


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



^ permalink  raw  reply  [nested|flat] 167+ messages in thread

* [PATCH v1 2/8] convert ParallelBitmapHeapState->state to an atomic
@ 2026-07-09 18:38  Nathan Bossart <[email protected]>
  0 siblings, 0 replies; 167+ messages in thread

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

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

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


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



^ permalink  raw  reply  [nested|flat] 167+ messages in thread

* [PATCH v1 2/8] convert ParallelBitmapHeapState->state to an atomic
@ 2026-07-09 18:38  Nathan Bossart <[email protected]>
  0 siblings, 0 replies; 167+ messages in thread

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

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

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


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



^ permalink  raw  reply  [nested|flat] 167+ messages in thread

end of thread, other threads:[~2026-07-09 18:38 UTC | newest]

Thread overview: 167+ messages (download: mbox mbox.gz follow: Atom feed)
-- links below jump to the message on this page --
2025-08-04 22:05 [PATCH v7 2/3] Handle default tablespace in AlterTableInternal Erik Wienhold <[email protected]>
2026-07-09 18:38 [PATCH v1 2/8] convert ParallelBitmapHeapState->state to an atomic Nathan Bossart <[email protected]>
2026-07-09 18:38 [PATCH v1 2/8] convert ParallelBitmapHeapState->state to an atomic Nathan Bossart <[email protected]>
2026-07-09 18:38 [PATCH v1 2/8] convert ParallelBitmapHeapState->state to an atomic Nathan Bossart <[email protected]>
2026-07-09 18:38 [PATCH v1 2/8] convert ParallelBitmapHeapState->state to an atomic Nathan Bossart <[email protected]>
2026-07-09 18:38 [PATCH v1 2/8] convert ParallelBitmapHeapState->state to an atomic Nathan Bossart <[email protected]>
2026-07-09 18:38 [PATCH v1 2/8] convert ParallelBitmapHeapState->state to an atomic Nathan Bossart <[email protected]>
2026-07-09 18:38 [PATCH v1 2/8] convert ParallelBitmapHeapState->state to an atomic Nathan Bossart <[email protected]>
2026-07-09 18:38 [PATCH v1 2/8] convert ParallelBitmapHeapState->state to an atomic Nathan Bossart <[email protected]>
2026-07-09 18:38 [PATCH v1 2/8] convert ParallelBitmapHeapState->state to an atomic Nathan Bossart <[email protected]>
2026-07-09 18:38 [PATCH v1 2/8] convert ParallelBitmapHeapState->state to an atomic Nathan Bossart <[email protected]>
2026-07-09 18:38 [PATCH v1 2/8] convert ParallelBitmapHeapState->state to an atomic Nathan Bossart <[email protected]>
2026-07-09 18:38 [PATCH v1 2/8] convert ParallelBitmapHeapState->state to an atomic Nathan Bossart <[email protected]>
2026-07-09 18:38 [PATCH v1 2/8] convert ParallelBitmapHeapState->state to an atomic Nathan Bossart <[email protected]>
2026-07-09 18:38 [PATCH v1 2/8] convert ParallelBitmapHeapState->state to an atomic Nathan Bossart <[email protected]>
2026-07-09 18:38 [PATCH v1 2/8] convert ParallelBitmapHeapState->state to an atomic Nathan Bossart <[email protected]>
2026-07-09 18:38 [PATCH v1 2/8] convert ParallelBitmapHeapState->state to an atomic Nathan Bossart <[email protected]>
2026-07-09 18:38 [PATCH v1 2/8] convert ParallelBitmapHeapState->state to an atomic Nathan Bossart <[email protected]>
2026-07-09 18:38 [PATCH v1 2/8] convert ParallelBitmapHeapState->state to an atomic Nathan Bossart <[email protected]>
2026-07-09 18:38 [PATCH v1 2/8] convert ParallelBitmapHeapState->state to an atomic Nathan Bossart <[email protected]>
2026-07-09 18:38 [PATCH v1 2/8] convert ParallelBitmapHeapState->state to an atomic Nathan Bossart <[email protected]>
2026-07-09 18:38 [PATCH v1 2/8] convert ParallelBitmapHeapState->state to an atomic Nathan Bossart <[email protected]>
2026-07-09 18:38 [PATCH v1 2/8] convert ParallelBitmapHeapState->state to an atomic Nathan Bossart <[email protected]>
2026-07-09 18:38 [PATCH v1 2/8] convert ParallelBitmapHeapState->state to an atomic Nathan Bossart <[email protected]>
2026-07-09 18:38 [PATCH v1 2/8] convert ParallelBitmapHeapState->state to an atomic Nathan Bossart <[email protected]>
2026-07-09 18:38 [PATCH v1 2/8] convert ParallelBitmapHeapState->state to an atomic Nathan Bossart <[email protected]>
2026-07-09 18:38 [PATCH v1 2/8] convert ParallelBitmapHeapState->state to an atomic Nathan Bossart <[email protected]>
2026-07-09 18:38 [PATCH v1 2/8] convert ParallelBitmapHeapState->state to an atomic Nathan Bossart <[email protected]>
2026-07-09 18:38 [PATCH v1 2/8] convert ParallelBitmapHeapState->state to an atomic Nathan Bossart <[email protected]>
2026-07-09 18:38 [PATCH v1 2/8] convert ParallelBitmapHeapState->state to an atomic Nathan Bossart <[email protected]>
2026-07-09 18:38 [PATCH v1 2/8] convert ParallelBitmapHeapState->state to an atomic Nathan Bossart <[email protected]>
2026-07-09 18:38 [PATCH v1 2/8] convert ParallelBitmapHeapState->state to an atomic Nathan Bossart <[email protected]>
2026-07-09 18:38 [PATCH v1 2/8] convert ParallelBitmapHeapState->state to an atomic Nathan Bossart <[email protected]>
2026-07-09 18:38 [PATCH v1 2/8] convert ParallelBitmapHeapState->state to an atomic Nathan Bossart <[email protected]>
2026-07-09 18:38 [PATCH v1 2/8] convert ParallelBitmapHeapState->state to an atomic Nathan Bossart <[email protected]>
2026-07-09 18:38 [PATCH v1 2/8] convert ParallelBitmapHeapState->state to an atomic Nathan Bossart <[email protected]>
2026-07-09 18:38 [PATCH v1 2/8] convert ParallelBitmapHeapState->state to an atomic Nathan Bossart <[email protected]>
2026-07-09 18:38 [PATCH v1 2/8] convert ParallelBitmapHeapState->state to an atomic Nathan Bossart <[email protected]>
2026-07-09 18:38 [PATCH v1 2/8] convert ParallelBitmapHeapState->state to an atomic Nathan Bossart <[email protected]>
2026-07-09 18:38 [PATCH v1 2/8] convert ParallelBitmapHeapState->state to an atomic Nathan Bossart <[email protected]>
2026-07-09 18:38 [PATCH v1 2/8] convert ParallelBitmapHeapState->state to an atomic Nathan Bossart <[email protected]>
2026-07-09 18:38 [PATCH v1 2/8] convert ParallelBitmapHeapState->state to an atomic Nathan Bossart <[email protected]>
2026-07-09 18:38 [PATCH v1 2/8] convert ParallelBitmapHeapState->state to an atomic Nathan Bossart <[email protected]>
2026-07-09 18:38 [PATCH v1 2/8] convert ParallelBitmapHeapState->state to an atomic Nathan Bossart <[email protected]>
2026-07-09 18:38 [PATCH v1 2/8] convert ParallelBitmapHeapState->state to an atomic Nathan Bossart <[email protected]>
2026-07-09 18:38 [PATCH v1 2/8] convert ParallelBitmapHeapState->state to an atomic Nathan Bossart <[email protected]>
2026-07-09 18:38 [PATCH v1 2/8] convert ParallelBitmapHeapState->state to an atomic Nathan Bossart <[email protected]>
2026-07-09 18:38 [PATCH v1 2/8] convert ParallelBitmapHeapState->state to an atomic Nathan Bossart <[email protected]>
2026-07-09 18:38 [PATCH v1 2/8] convert ParallelBitmapHeapState->state to an atomic Nathan Bossart <[email protected]>
2026-07-09 18:38 [PATCH v1 2/8] convert ParallelBitmapHeapState->state to an atomic Nathan Bossart <[email protected]>
2026-07-09 18:38 [PATCH v1 2/8] convert ParallelBitmapHeapState->state to an atomic Nathan Bossart <[email protected]>
2026-07-09 18:38 [PATCH v1 2/8] convert ParallelBitmapHeapState->state to an atomic Nathan Bossart <[email protected]>
2026-07-09 18:38 [PATCH v1 2/8] convert ParallelBitmapHeapState->state to an atomic Nathan Bossart <[email protected]>
2026-07-09 18:38 [PATCH v1 2/8] convert ParallelBitmapHeapState->state to an atomic Nathan Bossart <[email protected]>
2026-07-09 18:38 [PATCH v1 2/8] convert ParallelBitmapHeapState->state to an atomic Nathan Bossart <[email protected]>
2026-07-09 18:38 [PATCH v1 2/8] convert ParallelBitmapHeapState->state to an atomic Nathan Bossart <[email protected]>
2026-07-09 18:38 [PATCH v1 2/8] convert ParallelBitmapHeapState->state to an atomic Nathan Bossart <[email protected]>
2026-07-09 18:38 [PATCH v1 2/8] convert ParallelBitmapHeapState->state to an atomic Nathan Bossart <[email protected]>
2026-07-09 18:38 [PATCH v1 2/8] convert ParallelBitmapHeapState->state to an atomic Nathan Bossart <[email protected]>
2026-07-09 18:38 [PATCH v1 2/8] convert ParallelBitmapHeapState->state to an atomic Nathan Bossart <[email protected]>
2026-07-09 18:38 [PATCH v1 2/8] convert ParallelBitmapHeapState->state to an atomic Nathan Bossart <[email protected]>
2026-07-09 18:38 [PATCH v1 2/8] convert ParallelBitmapHeapState->state to an atomic Nathan Bossart <[email protected]>
2026-07-09 18:38 [PATCH v1 2/8] convert ParallelBitmapHeapState->state to an atomic Nathan Bossart <[email protected]>
2026-07-09 18:38 [PATCH v1 2/8] convert ParallelBitmapHeapState->state to an atomic Nathan Bossart <[email protected]>
2026-07-09 18:38 [PATCH v1 2/8] convert ParallelBitmapHeapState->state to an atomic Nathan Bossart <[email protected]>
2026-07-09 18:38 [PATCH v1 2/8] convert ParallelBitmapHeapState->state to an atomic Nathan Bossart <[email protected]>
2026-07-09 18:38 [PATCH v1 2/8] convert ParallelBitmapHeapState->state to an atomic Nathan Bossart <[email protected]>
2026-07-09 18:38 [PATCH v1 2/8] convert ParallelBitmapHeapState->state to an atomic Nathan Bossart <[email protected]>
2026-07-09 18:38 [PATCH v1 2/8] convert ParallelBitmapHeapState->state to an atomic Nathan Bossart <[email protected]>
2026-07-09 18:38 [PATCH v1 2/8] convert ParallelBitmapHeapState->state to an atomic Nathan Bossart <[email protected]>
2026-07-09 18:38 [PATCH v1 2/8] convert ParallelBitmapHeapState->state to an atomic Nathan Bossart <[email protected]>
2026-07-09 18:38 [PATCH v1 2/8] convert ParallelBitmapHeapState->state to an atomic Nathan Bossart <[email protected]>
2026-07-09 18:38 [PATCH v1 2/8] convert ParallelBitmapHeapState->state to an atomic Nathan Bossart <[email protected]>
2026-07-09 18:38 [PATCH v1 2/8] convert ParallelBitmapHeapState->state to an atomic Nathan Bossart <[email protected]>
2026-07-09 18:38 [PATCH v1 2/8] convert ParallelBitmapHeapState->state to an atomic Nathan Bossart <[email protected]>
2026-07-09 18:38 [PATCH v1 2/8] convert ParallelBitmapHeapState->state to an atomic Nathan Bossart <[email protected]>
2026-07-09 18:38 [PATCH v1 2/8] convert ParallelBitmapHeapState->state to an atomic Nathan Bossart <[email protected]>
2026-07-09 18:38 [PATCH v1 2/8] convert ParallelBitmapHeapState->state to an atomic Nathan Bossart <[email protected]>
2026-07-09 18:38 [PATCH v1 2/8] convert ParallelBitmapHeapState->state to an atomic Nathan Bossart <[email protected]>
2026-07-09 18:38 [PATCH v1 2/8] convert ParallelBitmapHeapState->state to an atomic Nathan Bossart <[email protected]>
2026-07-09 18:38 [PATCH v1 2/8] convert ParallelBitmapHeapState->state to an atomic Nathan Bossart <[email protected]>
2026-07-09 18:38 [PATCH v1 2/8] convert ParallelBitmapHeapState->state to an atomic Nathan Bossart <[email protected]>
2026-07-09 18:38 [PATCH v1 2/8] convert ParallelBitmapHeapState->state to an atomic Nathan Bossart <[email protected]>
2026-07-09 18:38 [PATCH v1 2/8] convert ParallelBitmapHeapState->state to an atomic Nathan Bossart <[email protected]>
2026-07-09 18:38 [PATCH v1 2/8] convert ParallelBitmapHeapState->state to an atomic Nathan Bossart <[email protected]>
2026-07-09 18:38 [PATCH v1 2/8] convert ParallelBitmapHeapState->state to an atomic Nathan Bossart <[email protected]>
2026-07-09 18:38 [PATCH v1 2/8] convert ParallelBitmapHeapState->state to an atomic Nathan Bossart <[email protected]>
2026-07-09 18:38 [PATCH v1 2/8] convert ParallelBitmapHeapState->state to an atomic Nathan Bossart <[email protected]>
2026-07-09 18:38 [PATCH v1 2/8] convert ParallelBitmapHeapState->state to an atomic Nathan Bossart <[email protected]>
2026-07-09 18:38 [PATCH v1 2/8] convert ParallelBitmapHeapState->state to an atomic Nathan Bossart <[email protected]>
2026-07-09 18:38 [PATCH v1 2/8] convert ParallelBitmapHeapState->state to an atomic Nathan Bossart <[email protected]>
2026-07-09 18:38 [PATCH v1 2/8] convert ParallelBitmapHeapState->state to an atomic Nathan Bossart <[email protected]>
2026-07-09 18:38 [PATCH v1 2/8] convert ParallelBitmapHeapState->state to an atomic Nathan Bossart <[email protected]>
2026-07-09 18:38 [PATCH v1 2/8] convert ParallelBitmapHeapState->state to an atomic Nathan Bossart <[email protected]>
2026-07-09 18:38 [PATCH v1 2/8] convert ParallelBitmapHeapState->state to an atomic Nathan Bossart <[email protected]>
2026-07-09 18:38 [PATCH v1 2/8] convert ParallelBitmapHeapState->state to an atomic Nathan Bossart <[email protected]>
2026-07-09 18:38 [PATCH v1 2/8] convert ParallelBitmapHeapState->state to an atomic Nathan Bossart <[email protected]>
2026-07-09 18:38 [PATCH v1 2/8] convert ParallelBitmapHeapState->state to an atomic Nathan Bossart <[email protected]>
2026-07-09 18:38 [PATCH v1 2/8] convert ParallelBitmapHeapState->state to an atomic Nathan Bossart <[email protected]>
2026-07-09 18:38 [PATCH v1 2/8] convert ParallelBitmapHeapState->state to an atomic Nathan Bossart <[email protected]>
2026-07-09 18:38 [PATCH v1 2/8] convert ParallelBitmapHeapState->state to an atomic Nathan Bossart <[email protected]>
2026-07-09 18:38 [PATCH v1 2/8] convert ParallelBitmapHeapState->state to an atomic Nathan Bossart <[email protected]>
2026-07-09 18:38 [PATCH v1 2/8] convert ParallelBitmapHeapState->state to an atomic Nathan Bossart <[email protected]>
2026-07-09 18:38 [PATCH v1 2/8] convert ParallelBitmapHeapState->state to an atomic Nathan Bossart <[email protected]>
2026-07-09 18:38 [PATCH v1 2/8] convert ParallelBitmapHeapState->state to an atomic Nathan Bossart <[email protected]>
2026-07-09 18:38 [PATCH v1 2/8] convert ParallelBitmapHeapState->state to an atomic Nathan Bossart <[email protected]>
2026-07-09 18:38 [PATCH v1 2/8] convert ParallelBitmapHeapState->state to an atomic Nathan Bossart <[email protected]>
2026-07-09 18:38 [PATCH v1 2/8] convert ParallelBitmapHeapState->state to an atomic Nathan Bossart <[email protected]>
2026-07-09 18:38 [PATCH v1 2/8] convert ParallelBitmapHeapState->state to an atomic Nathan Bossart <[email protected]>
2026-07-09 18:38 [PATCH v1 2/8] convert ParallelBitmapHeapState->state to an atomic Nathan Bossart <[email protected]>
2026-07-09 18:38 [PATCH v1 2/8] convert ParallelBitmapHeapState->state to an atomic Nathan Bossart <[email protected]>
2026-07-09 18:38 [PATCH v1 2/8] convert ParallelBitmapHeapState->state to an atomic Nathan Bossart <[email protected]>
2026-07-09 18:38 [PATCH v1 2/8] convert ParallelBitmapHeapState->state to an atomic Nathan Bossart <[email protected]>
2026-07-09 18:38 [PATCH v1 2/8] convert ParallelBitmapHeapState->state to an atomic Nathan Bossart <[email protected]>
2026-07-09 18:38 [PATCH v1 2/8] convert ParallelBitmapHeapState->state to an atomic Nathan Bossart <[email protected]>
2026-07-09 18:38 [PATCH v1 2/8] convert ParallelBitmapHeapState->state to an atomic Nathan Bossart <[email protected]>
2026-07-09 18:38 [PATCH v1 2/8] convert ParallelBitmapHeapState->state to an atomic Nathan Bossart <[email protected]>
2026-07-09 18:38 [PATCH v1 2/8] convert ParallelBitmapHeapState->state to an atomic Nathan Bossart <[email protected]>
2026-07-09 18:38 [PATCH v1 2/8] convert ParallelBitmapHeapState->state to an atomic Nathan Bossart <[email protected]>
2026-07-09 18:38 [PATCH v1 2/8] convert ParallelBitmapHeapState->state to an atomic Nathan Bossart <[email protected]>
2026-07-09 18:38 [PATCH v1 2/8] convert ParallelBitmapHeapState->state to an atomic Nathan Bossart <[email protected]>
2026-07-09 18:38 [PATCH v1 2/8] convert ParallelBitmapHeapState->state to an atomic Nathan Bossart <[email protected]>
2026-07-09 18:38 [PATCH v1 2/8] convert ParallelBitmapHeapState->state to an atomic Nathan Bossart <[email protected]>
2026-07-09 18:38 [PATCH v1 2/8] convert ParallelBitmapHeapState->state to an atomic Nathan Bossart <[email protected]>
2026-07-09 18:38 [PATCH v1 2/8] convert ParallelBitmapHeapState->state to an atomic Nathan Bossart <[email protected]>
2026-07-09 18:38 [PATCH v1 2/8] convert ParallelBitmapHeapState->state to an atomic Nathan Bossart <[email protected]>
2026-07-09 18:38 [PATCH v1 2/8] convert ParallelBitmapHeapState->state to an atomic Nathan Bossart <[email protected]>
2026-07-09 18:38 [PATCH v1 2/8] convert ParallelBitmapHeapState->state to an atomic Nathan Bossart <[email protected]>
2026-07-09 18:38 [PATCH v1 2/8] convert ParallelBitmapHeapState->state to an atomic Nathan Bossart <[email protected]>
2026-07-09 18:38 [PATCH v1 2/8] convert ParallelBitmapHeapState->state to an atomic Nathan Bossart <[email protected]>
2026-07-09 18:38 [PATCH v1 2/8] convert ParallelBitmapHeapState->state to an atomic Nathan Bossart <[email protected]>
2026-07-09 18:38 [PATCH v1 2/8] convert ParallelBitmapHeapState->state to an atomic Nathan Bossart <[email protected]>
2026-07-09 18:38 [PATCH v1 2/8] convert ParallelBitmapHeapState->state to an atomic Nathan Bossart <[email protected]>
2026-07-09 18:38 [PATCH v1 2/8] convert ParallelBitmapHeapState->state to an atomic Nathan Bossart <[email protected]>
2026-07-09 18:38 [PATCH v1 2/8] convert ParallelBitmapHeapState->state to an atomic Nathan Bossart <[email protected]>
2026-07-09 18:38 [PATCH v1 2/8] convert ParallelBitmapHeapState->state to an atomic Nathan Bossart <[email protected]>
2026-07-09 18:38 [PATCH v1 2/8] convert ParallelBitmapHeapState->state to an atomic Nathan Bossart <[email protected]>
2026-07-09 18:38 [PATCH v1 2/8] convert ParallelBitmapHeapState->state to an atomic Nathan Bossart <[email protected]>
2026-07-09 18:38 [PATCH v1 2/8] convert ParallelBitmapHeapState->state to an atomic Nathan Bossart <[email protected]>
2026-07-09 18:38 [PATCH v1 2/8] convert ParallelBitmapHeapState->state to an atomic Nathan Bossart <[email protected]>
2026-07-09 18:38 [PATCH v1 2/8] convert ParallelBitmapHeapState->state to an atomic Nathan Bossart <[email protected]>
2026-07-09 18:38 [PATCH v1 2/8] convert ParallelBitmapHeapState->state to an atomic Nathan Bossart <[email protected]>
2026-07-09 18:38 [PATCH v1 2/8] convert ParallelBitmapHeapState->state to an atomic Nathan Bossart <[email protected]>
2026-07-09 18:38 [PATCH v1 2/8] convert ParallelBitmapHeapState->state to an atomic Nathan Bossart <[email protected]>
2026-07-09 18:38 [PATCH v1 2/8] convert ParallelBitmapHeapState->state to an atomic Nathan Bossart <[email protected]>
2026-07-09 18:38 [PATCH v1 2/8] convert ParallelBitmapHeapState->state to an atomic Nathan Bossart <[email protected]>
2026-07-09 18:38 [PATCH v1 2/8] convert ParallelBitmapHeapState->state to an atomic Nathan Bossart <[email protected]>
2026-07-09 18:38 [PATCH v1 2/8] convert ParallelBitmapHeapState->state to an atomic Nathan Bossart <[email protected]>
2026-07-09 18:38 [PATCH v1 2/8] convert ParallelBitmapHeapState->state to an atomic Nathan Bossart <[email protected]>
2026-07-09 18:38 [PATCH v1 2/8] convert ParallelBitmapHeapState->state to an atomic Nathan Bossart <[email protected]>
2026-07-09 18:38 [PATCH v1 2/8] convert ParallelBitmapHeapState->state to an atomic Nathan Bossart <[email protected]>
2026-07-09 18:38 [PATCH v1 2/8] convert ParallelBitmapHeapState->state to an atomic Nathan Bossart <[email protected]>
2026-07-09 18:38 [PATCH v1 2/8] convert ParallelBitmapHeapState->state to an atomic Nathan Bossart <[email protected]>
2026-07-09 18:38 [PATCH v1 2/8] convert ParallelBitmapHeapState->state to an atomic Nathan Bossart <[email protected]>
2026-07-09 18:38 [PATCH v1 2/8] convert ParallelBitmapHeapState->state to an atomic Nathan Bossart <[email protected]>
2026-07-09 18:38 [PATCH v1 2/8] convert ParallelBitmapHeapState->state to an atomic Nathan Bossart <[email protected]>
2026-07-09 18:38 [PATCH v1 2/8] convert ParallelBitmapHeapState->state to an atomic Nathan Bossart <[email protected]>
2026-07-09 18:38 [PATCH v1 2/8] convert ParallelBitmapHeapState->state to an atomic Nathan Bossart <[email protected]>
2026-07-09 18:38 [PATCH v1 2/8] convert ParallelBitmapHeapState->state to an atomic Nathan Bossart <[email protected]>
2026-07-09 18:38 [PATCH v1 2/8] convert ParallelBitmapHeapState->state to an atomic Nathan Bossart <[email protected]>
2026-07-09 18:38 [PATCH v1 2/8] convert ParallelBitmapHeapState->state to an atomic Nathan Bossart <[email protected]>
2026-07-09 18:38 [PATCH v1 2/8] convert ParallelBitmapHeapState->state to an atomic Nathan Bossart <[email protected]>
2026-07-09 18:38 [PATCH v1 2/8] convert ParallelBitmapHeapState->state to an atomic Nathan Bossart <[email protected]>
2026-07-09 18:38 [PATCH v1 2/8] convert ParallelBitmapHeapState->state to an atomic Nathan Bossart <[email protected]>
2026-07-09 18:38 [PATCH v1 2/8] convert ParallelBitmapHeapState->state to an atomic Nathan Bossart <[email protected]>
2026-07-09 18:38 [PATCH v1 2/8] convert ParallelBitmapHeapState->state to an atomic Nathan Bossart <[email protected]>
2026-07-09 18:38 [PATCH v1 2/8] convert ParallelBitmapHeapState->state to an atomic Nathan Bossart <[email protected]>