+ mm-compaction-avoid-unneeded-pageblock_end_pfn-when-no_set_skip_hint-is-set.patch added to mm-unstable branch

+ mm-compaction-avoid-unneeded-pageblock_end_pfn-when-no_set_skip_hint-is-set.patch added to mm-unstable branch

[Andrew Morton]

The patch titled
     Subject: mm/compaction: avoid unneeded pageblock_end_pfn when no_set_skip_hint is set
has been added to the -mm mm-unstable branch.  Its filename is
     mm-compaction-avoid-unneeded-pageblock_end_pfn-when-no_set_skip_hint-is-set.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-unneeded-pageblock_end_pfn-when-no_set_skip_hint-is-set.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: Kemeng Shi <shikemeng@huawei.com>
Subject: mm/compaction: avoid unneeded pageblock_end_pfn when no_set_skip_hint is set
Date: Fri, 21 Jul 2023 23:09:57 +0800

Move pageblock_end_pfn after no_set_skip_hint check to avoid unneeded
pageblock_end_pfn if no_set_skip_hint is set.

Link: https://lkml.kernel.org/r/20230721150957.2058634-3-shikemeng@huawei.com
Signed-off-by: Kemeng Shi <shikemeng@huawei.com>
Reviewed-by: Baolin Wang <baolin.wang@linux.alibaba.com>
Reviewed-by: David Hildenbrand <david@redhat.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
---

 mm/compaction.c |    4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

--- a/mm/compaction.c~mm-compaction-avoid-unneeded-pageblock_end_pfn-when-no_set_skip_hint-is-set
+++ a/mm/compaction.c
@@ -458,12 +458,12 @@ static void update_cached_migrate(struct
 {
 	struct zone *zone = cc->zone;
 
-	pfn = pageblock_end_pfn(pfn);
-
 	/* Set for isolation rather than compaction */
 	if (cc->no_set_skip_hint)
 		return;
 
+	pfn = pageblock_end_pfn(pfn);
+
 	if (pfn > zone->compact_cached_migrate_pfn[0])
 		zone->compact_cached_migrate_pfn[0] = pfn;
 	if (cc->mode != MIGRATE_ASYNC &&
_

Patches currently in -mm which might be from shikemeng@huawei.com are

mm-compaction-correct-comment-of-candidate-pfn-in-fast_isolate_freepages.patch
mm-compaction-avoid-unneeded-pageblock_end_pfn-when-no_set_skip_hint-is-set.patch