[merged mm-stable] mm-compaction-correct-comment-of-fast_find_migrateblock-in-isolate_migratepages.patch removed from -mm tree

[merged mm-stable] mm-compaction-correct-comment-of-fast_find_migrateblock-in-isolate_migratepages.patch removed from -mm tree

[Andrew Morton]

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@huaweicloud.com>
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@huaweicloud.com
Signed-off-by: Kemeng Shi <shikemeng@huaweicloud.com>
Reviewed-by: Baolin Wang <baolin.wang@linux.alibaba.com>
Cc: David Hildenbrand <david@redhat.com>
Cc: Mel Gorman <mgorman@techsingularity.net>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
---

 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@huaweicloud.com are