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UPSTREAM: mm: page_alloc: move free pages when converting block during isolation

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When claiming a block during compaction isolation, move any remaining free
pages to the correct freelists as well, instead of stranding them on the
wrong list.  Otherwise, this encourages incompatible page mixing down the
line, and thus long-term fragmentation.

Link: https://lkml.kernel.org/r/20240320180429.678181-5-hannes@cmpxchg.org
Change-Id: I9b14f1c51cc5f17e877087a74b59fe4da8f696b5
Signed-off-by: Johannes Weiner <hannes@cmpxchg.org>
Reviewed-by: Zi Yan <ziy@nvidia.com>
Reviewed-by: Vlastimil Babka <vbabka@suse.cz>
Acked-by: Mel Gorman <mgorman@techsingularity.net>
Tested-by: "Huang, Ying" <ying.huang@intel.com>
Tested-by: Baolin Wang <baolin.wang@linux.alibaba.com>
Cc: David Hildenbrand <david@redhat.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
(cherry picked from commit b54ccd3c6bacbc571f7e61797fb5ff9fe3861413)
Bug: 420771453
Signed-off-by: Kalesh Singh <kaleshsingh@google.com>
This commit is contained in:
Johannes Weiner
2024-03-20 14:02:09 -04:00
committed by Kalesh Singh
parent f76299151c
commit 350c3b1d61
1 changed files with 4 additions and 1 deletions
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5
mm/page_alloc.c
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@@ -2830,9 +2830,12 @@ int __isolate_free_page(struct page *page, unsigned int order)
* Only change normal pageblocks (i.e., they can merge * Only change normal pageblocks (i.e., they can merge
* with others) * with others)
*/ */
if (migratetype_is_mergeable(mt)) if (migratetype_is_mergeable(mt)) {
set_pageblock_migratetype(page, set_pageblock_migratetype(page,
MIGRATE_MOVABLE); MIGRATE_MOVABLE);
move_freepages_block(zone, page,
MIGRATE_MOVABLE, NULL);
}
} }
} }