| From: Miaohe Lin <linmiaohe@huawei.com> |
| Subject: 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> |
| --- |
| |
| mm/compaction.c | 12 ++++++------ |
| 1 file changed, 6 insertions(+), 6 deletions(-) |
| |
| --- a/mm/compaction.c~mm-compaction-clean-up-comment-about-async-compaction-in-isolate_migratepages |
| +++ a/mm/compaction.c |
| @@ -1941,12 +1941,12 @@ static isolate_migrate_t isolate_migrate |
| 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); |
| _ |
