linux-kernel - [PATCH v2 5/8] mm/compaction: correct comment of cached migrate pfn update

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Message-Id: <20230802093741.2333325-6-shikemeng@huaweicloud.com>
Date:   Wed,  2 Aug 2023 17:37:38 +0800
From:   Kemeng Shi <shikemeng@...weicloud.com>
To:     linux-mm@...ck.org, linux-kernel@...r.kernel.org,
        akpm@...ux-foundation.org, baolin.wang@...ux.alibaba.com,
        mgorman@...hsingularity.net, david@...hat.com
Cc:     shikemeng@...weicloud.com
Subject: [PATCH v2 5/8] mm/compaction: correct comment of cached migrate pfn update

Commit e380bebe47715 ("mm, compaction: keep migration source private to
a single compaction instance") moved update of async and sync
compact_cached_migrate_pfn from update_pageblock_skip to
update_cached_migrate but left the comment behind.
Move the relevant comment to correct this.

Signed-off-by: Kemeng Shi <shikemeng@...weicloud.com>
Reviewed-by: David Hildenbrand <david@...hat.com>
Reviewed-by: Baolin Wang <baolin.wang@...ux.alibaba.com>
---
 mm/compaction.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/mm/compaction.c b/mm/compaction.c
index 5c9dc4049e8e..7f01fbeb3084 100644
--- a/mm/compaction.c
+++ b/mm/compaction.c
@@ -469,6 +469,7 @@ static void update_cached_migrate(struct compact_control *cc, unsigned long pfn)
 
 	pfn = pageblock_end_pfn(pfn);
 
+	/* Update where async and sync compaction should restart */
 	if (pfn > zone->compact_cached_migrate_pfn[0])
 		zone->compact_cached_migrate_pfn[0] = pfn;
 	if (cc->mode != MIGRATE_ASYNC &&
@@ -490,7 +491,6 @@ static void update_pageblock_skip(struct compact_control *cc,
 
 	set_pageblock_skip(page);
 
-	/* Update where async and sync compaction should restart */
 	if (pfn < zone->compact_cached_free_pfn)
 		zone->compact_cached_free_pfn = pfn;
 }
-- 
2.30.0