The patch titled
Subject: mm, compaction: fast_find_migrateblock() should return pfn in the target zone
has been added to the -mm mm-unstable branch. Its filename is
mm-compaction-fast_find_migrateblock-should-return-pfn-in-the-target-zone.patch
This patch will shortly appear at
https://git.kernel.org/pub/scm/linux/kernel/git/akpm/25-new.git/tree/patches/mm-compaction-fast_find_migrateblock-should-return-pfn-in-the-target-zone.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: Rei Yamamoto <yamamoto.rei@xxxxxxxxxxxxxx>
Subject: mm, compaction: fast_find_migrateblock() should return pfn in the target zone
Prevent returning a pfn outside the target zone in case that not aligned
with pageblock boundary. Otherwise isolate_migratepages_block() would
handle pages not in the target zone.
Link: https://lkml.kernel.org/r/20220511044300.4069-1-yamamoto.rei@xxxxxxxxxxxxxx
Signed-off-by: Rei Yamamoto <yamamoto.rei@xxxxxxxxxxxxxx>
Reviewed-by: Miaohe Lin <linmiaohe@xxxxxxxxxx>
Cc: Don Dutile <ddutile@xxxxxxxxxx>
Cc: Mel Gorman <mgorman@xxxxxxxxxxxxxxxxxxx>
Cc: Wonhyuk Yang <vvghjk1234@xxxxxxxxx>
Cc: Rei Yamamoto <yamamoto.rei@xxxxxxxxxxxxxx>
Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
---
mm/compaction.c | 2 ++
1 file changed, 2 insertions(+)
--- a/mm/compaction.c~mm-compaction-fast_find_migrateblock-should-return-pfn-in-the-target-zone
+++ a/mm/compaction.c
@@ -1848,6 +1848,8 @@ static unsigned long fast_find_migratebl
update_fast_start_pfn(cc, free_pfn);
pfn = pageblock_start_pfn(free_pfn);
+ if (pfn < cc->zone->zone_start_pfn)
+ pfn = cc->zone->zone_start_pfn;
cc->fast_search_fail = 0;
found_block = true;
set_pageblock_skip(freepage);
_
Patches currently in -mm which might be from yamamoto.rei@xxxxxxxxxxxxxx are
mm-compaction-fast_find_migrateblock-should-return-pfn-in-the-target-zone.patch
