From: Vlastimil Babka <vbabka@suse.cz>
Date: Wed, 10 Dec 2014 23:43:07 +0000 (-0800)
Subject: mm, cma: drain single zone pcplists
X-Git-Url: https://git.stricted.de/?a=commitdiff_plain;h=510f550788b8aba5070c59ec652de8b4ab660852;p=GitHub%2FLineageOS%2FG12%2Fandroid_kernel_amlogic_linux-4.9.git

mm, cma: drain single zone pcplists

CMA allocation drains pcplists so that pages can merge back to buddy
allocator.  Since it operates on a single zone, we can reduce the
pcplists drain to the single zone, which is now possible.

The change should make CMA allocations faster and not disturbing
unrelated pcplists anymore.

Signed-off-by: Vlastimil Babka <vbabka@suse.cz>
Cc: Naoya Horiguchi <n-horiguchi@ah.jp.nec.com>
Cc: Mel Gorman <mgorman@suse.de>
Cc: Rik van Riel <riel@redhat.com>
Cc: Yasuaki Ishimatsu <isimatu.yasuaki@jp.fujitsu.com>
Cc: Zhang Yanfei <zhangyanfei@cn.fujitsu.com>
Cc: Xishi Qiu <qiuxishi@huawei.com>
Cc: Vladimir Davydov <vdavydov@parallels.com>
Cc: Joonsoo Kim <iamjoonsoo.kim@lge.com>
Cc: Michal Nazarewicz <mina86@mina86.com>
Cc: Marek Szyprowski <m.szyprowski@samsung.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
---

diff --git a/mm/page_alloc.c b/mm/page_alloc.c
index 13d5796de8f3..f3a6bf12cbc1 100644
--- a/mm/page_alloc.c
+++ b/mm/page_alloc.c
@@ -6416,7 +6416,7 @@ int alloc_contig_range(unsigned long start, unsigned long end,
 	 */
 
 	lru_add_drain_all();
-	drain_all_pages(NULL);
+	drain_all_pages(cc.zone);
 
 	order = 0;
 	outer_start = start;