From: Abel Wu <wuyun.abel@bytedance.com>
To: Andrew Morton <akpm@linux-foundation.org>,
Vlastimil Babka <vbabka@suse.cz>,
Michal Hocko <mhocko@kernel.org>,
Mel Gorman <mgorman@techsingularity.net>,
Muchun Song <songmuchun@bytedance.com>
Cc: linux-mm@kvack.org, linux-kernel@vger.kernel.org,
Abel Wu <wuyun.abel@bytedance.com>
Subject: [PATCH] mm/page_alloc: only search higher order when fallback
Date: Wed, 3 Aug 2022 10:51:21 +0800 [thread overview]
Message-ID: <20220803025121.47018-1-wuyun.abel@bytedance.com> (raw)
It seems unnecessary to search pages with order < alloc_order in
fallback allocation.
Signed-off-by: Abel Wu <wuyun.abel@bytedance.com>
---
mm/page_alloc.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/mm/page_alloc.c b/mm/page_alloc.c
index e008a3df0485..0abafc2fc3e0 100644
--- a/mm/page_alloc.c
+++ b/mm/page_alloc.c
@@ -2934,7 +2934,7 @@ __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;
/*
--
2.31.1
next reply other threads:[~2022-08-03 2:51 UTC|newest]
Thread overview: 4+ messages / expand[flat|nested] mbox.gz Atom feed top
2022-08-03 2:51 Abel Wu [this message]
2022-08-03 8:15 ` [PATCH] mm/page_alloc: only search higher order when fallback Vlastimil Babka
2022-08-04 5:36 ` Muchun Song
2022-08-04 9:39 ` Mel Gorman
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