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mm: consider CMA pages in watermark check for NUMA balancing target node

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Currently in migrate_balanced_pgdat(), ALLOC_CMA flag is not passed when
checking watermark on the migration target node.  This does not match the
gfp in alloc_misplaced_dst_folio() which allows allocation from CMA.

This causes promotion failures when there are a lot of available CMA
memory in the system.

Therefore, we change the alloc_flags passed to zone_watermark_ok() in
migrate_balanced_pgdat().

Link: https://lkml.kernel.org/r/20240801180456.25927-1-kaiyang2@cs.cmu.edu
Signed-off-by: Kaiyang Zhao <kaiyang2@cs.cmu.edu>
Acked-by: Johannes Weiner <hannes@cmpxchg.org>
Reviewed-by: Baolin Wang <baolin.wang@linux.alibaba.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
This commit is contained in:
Kaiyang Zhao 2024-08-01 18:04:56 +00:00 committed by Andrew Morton
parent 81920438a6
commit 6d192303e8
1 changed files with 1 additions and 1 deletions
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2
mm/migrate.c
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@ -2526,7 +2526,7 @@ static bool migrate_balanced_pgdat(struct pglist_data *pgdat,
if (!zone_watermark_ok(zone, 0,
high_wmark_pages(zone) +
nr_migrate_pages,
ZONE_MOVABLE, 0))
ZONE_MOVABLE, ALLOC_CMA))
continue;
return true;
}