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| author | Miaohe Lin <linmiaohe@huawei.com> | 2022-04-29 08:16:18 +0200 |
|---|---|---|
| committer | akpm <akpm@linux-foundation.org> | 2022-04-29 08:16:18 +0200 |
| commit | 556162bf3a8c27dd6aab180e9a1427d945a708e9 (patch) | |
| tree | 2321b4f4795a3859247b1f1d3414ee987118ec25 /mm/compaction.c | |
| parent | mm: compaction: use helper compound_nr in isolate_migratepages_block (diff) | |
| download | linux-556162bf3a8c27dd6aab180e9a1427d945a708e9.tar.xz linux-556162bf3a8c27dd6aab180e9a1427d945a708e9.zip | |
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.c | 12 |
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); |