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authorMiaohe Lin <linmiaohe@huawei.com>2022-04-29 09:16:18 +0300
committerakpm <akpm@linux-foundation.org>2022-04-29 09:16:18 +0300
commit556162bf3a8c27dd6aab180e9a1427d945a708e9 (patch)
tree2321b4f4795a3859247b1f1d3414ee987118ec25 /mm/compaction.c
parent66fe1cf7f581593750931266ad8f57c744e4b750 (diff)
downloadlinux-556162bf3a8c27dd6aab180e9a1427d945a708e9.tar.xz
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. Link: https://lkml.kernel.org/r/20220418141253.24298-9-linmiaohe@huawei.com Signed-off-by: Miaohe Lin <linmiaohe@huawei.com> Cc: Charan Teja Kalla <charante@codeaurora.org> Cc: David Hildenbrand <david@redhat.com> Cc: Pintu Kumar <pintu@codeaurora.org> Cc: Vlastimil Babka <vbabka@suse.cz> Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Diffstat (limited to 'mm/compaction.c')
-rw-r--r--mm/compaction.c12
1 files 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);