linux-kernel - [PATCH 08/12] mm: compaction: clean up comment about async compaction in isolate

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Message-ID: <20220418141253.24298-9-linmiaohe@huawei.com>
Date:   Mon, 18 Apr 2022 22:12:49 +0800
From:   Miaohe Lin <linmiaohe@...wei.com>
To:     <akpm@...ux-foundation.org>
CC:     <vbabka@...e.cz>, <pintu@...eaurora.org>,
        <charante@...eaurora.org>, <linux-mm@...ck.org>,
        <linux-kernel@...r.kernel.org>, <linmiaohe@...wei.com>
Subject: [PATCH 08/12] mm: compaction: clean up comment about async compaction in isolate_migratepages

Since commit 282722b0d258 ("mm, compaction: restrict async compaction to
pageblocks of same migratetype"), async direct compaction is restricted to
scan the pageblocks of same migratetype. Correct the comment accordingly.

Signed-off-by: Miaohe Lin <linmiaohe@...wei.com>
---
 mm/compaction.c | 12 ++++++------
 1 file changed, 6 insertions(+), 6 deletions(-)

diff --git a/mm/compaction.c b/mm/compaction.c
index 55013a2af817..562f274b2c51 100644
--- a/mm/compaction.c
+++ b/mm/compaction.c
@@ -1941,12 +1941,12 @@ static isolate_migrate_t isolate_migratepages(struct compact_control *cc)
 			continue;
 
 		/*
-		 * For async compaction, also only scan in MOVABLE blocks
-		 * without huge pages. Async compaction is optimistic to see
-		 * if the minimum amount of work satisfies the allocation.
-		 * The cached PFN is updated as it's possible that all
-		 * remaining blocks between source and target are unsuitable
-		 * and the compaction scanners fail to meet.
+		 * For async direct compaction, only scan the pageblocks of the
+		 * same migratetype without huge pages. Async direct compaction
+		 * is optimistic to see if the minimum amount of work satisfies
+		 * the allocation. The cached PFN is updated as it's possible
+		 * that all remaining blocks between source and target are
+		 * unsuitable and the compaction scanners fail to meet.
 		 */
 		if (!suitable_migration_source(cc, page)) {
 			update_cached_migrate(cc, block_end_pfn);
-- 
2.23.0