The quilt patch titled
Subject: mm/compaction: correct comment of fast_find_migrateblock in isolate_migratepages
has been removed from the -mm tree. Its filename was
mm-compaction-correct-comment-of-fast_find_migrateblock-in-isolate_migratepages.patch
This patch was dropped because it was merged into the mm-stable branch
of git://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm
------------------------------------------------------
From: Kemeng Shi <shikemeng@xxxxxxxxxxxxxxx>
Subject: mm/compaction: correct comment of fast_find_migrateblock in isolate_migratepages
Date: Fri, 4 Aug 2023 19:04:50 +0800
After 90ed667c03fe5 ("Revert "Revert "mm/compaction: fix set skip in
fast_find_migrateblock"""), we remove skip set in fast_find_migrateblock.
Correct comment that fast_find_block is used to avoid isolation_suitable
check for pageblock returned from fast_find_migrateblock because
fast_find_migrateblock will mark found pageblock skipped.
Instead, comment that fast_find_block is used to avoid a redundant check
of fast found pageblock which is already checked skip flag inside
fast_find_migrateblock.
Link: https://lkml.kernel.org/r/20230804110454.2935878-5-shikemeng@xxxxxxxxxxxxxxx
Signed-off-by: Kemeng Shi <shikemeng@xxxxxxxxxxxxxxx>
Reviewed-by: Baolin Wang <baolin.wang@xxxxxxxxxxxxxxxxx>
Cc: David Hildenbrand <david@xxxxxxxxxx>
Cc: Mel Gorman <mgorman@xxxxxxxxxxxxxxxxxxx>
Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
---
mm/compaction.c | 6 +++---
1 file changed, 3 insertions(+), 3 deletions(-)
--- a/mm/compaction.c~mm-compaction-correct-comment-of-fast_find_migrateblock-in-isolate_migratepages
+++ a/mm/compaction.c
@@ -1987,9 +1987,9 @@ static isolate_migrate_t isolate_migrate
block_start_pfn = cc->zone->zone_start_pfn;
/*
- * fast_find_migrateblock marks a pageblock skipped so to avoid
- * the isolation_suitable check below, check whether the fast
- * search was successful.
+ * fast_find_migrateblock() has already ensured the pageblock is not
+ * set with a skipped flag, so to avoid the isolation_suitable check
+ * below again, check whether the fast search was successful.
*/
fast_find_block = low_pfn != cc->migrate_pfn && !cc->fast_search_fail;
_
Patches currently in -mm which might be from shikemeng@xxxxxxxxxxxxxxx are
