The patch titled
Subject: mm: compaction: avoid fragmentation score calculation for empty zones
has been added to the -mm mm-unstable branch. Its filename is
mm-compaction-avoid-fragmentation-score-calculation-for-empty-zones.patch
This patch will shortly appear at
https://git.kernel.org/pub/scm/linux/kernel/git/akpm/25-new.git/tree/patches/mm-compaction-avoid-fragmentation-score-calculation-for-empty-zones.patch
This patch will later appear in the mm-unstable branch at
git://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm
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------------------------------------------------------
From: Baolin Wang <baolin.wang@xxxxxxxxxxxxxxxxx>
Subject: mm: compaction: avoid fragmentation score calculation for empty zones
Date: Tue, 10 Jan 2023 21:36:22 +0800
There is no need to calculate the fragmentation score for empty zones.
Link: https://lkml.kernel.org/r/100331ad9d274a9725e687b00d85d75d7e4a17c7.1673342761.git.baolin.wang@xxxxxxxxxxxxxxxxx
Signed-off-by: Baolin Wang <baolin.wang@xxxxxxxxxxxxxxxxx>
Cc: Matthew Wilcox <willy@xxxxxxxxxxxxx>
Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
---
mm/compaction.c | 2 ++
1 file changed, 2 insertions(+)
--- a/mm/compaction.c~mm-compaction-avoid-fragmentation-score-calculation-for-empty-zones
+++ a/mm/compaction.c
@@ -2025,6 +2025,8 @@ static unsigned int fragmentation_score_
struct zone *zone;
zone = &pgdat->node_zones[zoneid];
+ if (!populated_zone(zone))
+ continue;
score += fragmentation_score_zone_weighted(zone);
}
_
Patches currently in -mm which might be from baolin.wang@xxxxxxxxxxxxxxxxx are
mm-compaction-remove-redundant-vm_bug_on-in-compact_zone.patch
mm-compaction-move-list-validation-into-compact_zone.patch
mm-compaction-count-the-migration-scanned-pages-events-for-proactive-compaction.patch
mm-compaction-add-missing-kcompactd-wakeup-trace-event.patch
mm-compaction-avoid-fragmentation-score-calculation-for-empty-zones.patch
