diff options
| author | Abel Wu | 2022-08-03 10:51:21 +0800 |
|---|---|---|
| committer | Andrew Morton | 2022-09-11 20:25:51 -0700 |
| commit | e933dc4a07b36b835f8ad7085e17cc21ed869051 (patch) | |
| tree | 12fd3345e1ba46864275d0633932cf087f06d3c1 /mm/page_alloc.c | |
| parent | 97bab178e8e4035e0f3a8b1362eec3e86fdcb9ce (diff) | |
mm/page_alloc: only search higher order when fallback
It seems unnecessary to search pages with order < alloc_order in
fallback allocation.
This can currently happen with ALLOC_NOFRAGMENT and alloc_order >
pageblock_order, so add a test to prevent it.
[vbabka@suse.cz: changelog addition]
Link: https://lkml.kernel.org/r/20220803025121.47018-1-wuyun.abel@bytedance.com
Signed-off-by: Abel Wu <wuyun.abel@bytedance.com>
Acked-by: Vlastimil Babka <vbabka@suse.cz>
Acked-by: Mel Gorman <mgorman@techsingularity.net>
Reviewed-by: Muchun Song <songmuchun@bytedance.com>
Cc: Michal Hocko <mhocko@kernel.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Diffstat (limited to 'mm/page_alloc.c')
| -rw-r--r-- | mm/page_alloc.c | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/mm/page_alloc.c b/mm/page_alloc.c index f66a4a49ee0b..f13d3ead95f2 100644 --- a/mm/page_alloc.c +++ b/mm/page_alloc.c @@ -3010,7 +3010,7 @@ __rmqueue_fallback(struct zone *zone, int order, int start_migratetype, * i.e. orders < pageblock_order. If there are no local zones free, * the zonelists will be reiterated without ALLOC_NOFRAGMENT. */ - if (alloc_flags & ALLOC_NOFRAGMENT) + if (order < pageblock_order && alloc_flags & ALLOC_NOFRAGMENT) min_order = pageblock_order; /* |