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From: Andres Freund <[email protected]>
Subject: [PATCH v4 14/15] WIP: Don't initialize page in {vm,fsm}_extend(), not needed
Date: Tue, 28 Feb 2023 20:56:32 -0800

---
 src/backend/access/heap/visibilitymap.c   | 6 +-----
 src/backend/storage/freespace/freespace.c | 5 +----
 2 files changed, 2 insertions(+), 9 deletions(-)

diff --git a/src/backend/access/heap/visibilitymap.c b/src/backend/access/heap/visibilitymap.c
index 74ff01bb172..709213d0d97 100644
--- a/src/backend/access/heap/visibilitymap.c
+++ b/src/backend/access/heap/visibilitymap.c
@@ -623,11 +623,9 @@ static void
 vm_extend(Relation rel, BlockNumber vm_nblocks)
 {
 	BlockNumber vm_nblocks_now;
-	PGAlignedBlock pg;
+	PGAlignedBlock pg = {0};
 	SMgrRelation reln;
 
-	PageInit((Page) pg.data, BLCKSZ, 0);
-
 	/*
 	 * We use the relation extension lock to lock out other backends trying to
 	 * extend the visibility map at the same time. It also locks out extension
@@ -663,8 +661,6 @@ vm_extend(Relation rel, BlockNumber vm_nblocks)
 	/* Now extend the file */
 	while (vm_nblocks_now < vm_nblocks)
 	{
-		PageSetChecksumInplace((Page) pg.data, vm_nblocks_now);
-
 		smgrextend(reln, VISIBILITYMAP_FORKNUM, vm_nblocks_now, pg.data, false);
 		vm_nblocks_now++;
 	}
diff --git a/src/backend/storage/freespace/freespace.c b/src/backend/storage/freespace/freespace.c
index 3e9693b293b..90c529958e7 100644
--- a/src/backend/storage/freespace/freespace.c
+++ b/src/backend/storage/freespace/freespace.c
@@ -608,10 +608,9 @@ static void
 fsm_extend(Relation rel, BlockNumber fsm_nblocks)
 {
 	BlockNumber fsm_nblocks_now;
-	PGAlignedBlock pg;
+	PGAlignedBlock pg = {0};
 	SMgrRelation reln;
 
-	PageInit((Page) pg.data, BLCKSZ, 0);
 
 	/*
 	 * We use the relation extension lock to lock out other backends trying to
@@ -649,8 +648,6 @@ fsm_extend(Relation rel, BlockNumber fsm_nblocks)
 	/* Extend as needed. */
 	while (fsm_nblocks_now < fsm_nblocks)
 	{
-		PageSetChecksumInplace((Page) pg.data, fsm_nblocks_now);
-
 		smgrextend(reln, FSM_FORKNUM, fsm_nblocks_now,
 				   pg.data, false);
 		fsm_nblocks_now++;
-- 
2.38.0


--njltjzibte523gwd
Content-Type: text/x-diff; charset=us-ascii
Content-Disposition: attachment;
	filename="v4-0015-Convert-a-few-places-to-ExtendBufferedRelTo.patch"

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