From: Vlastimil Babka <vbabka@suse.cz>
Date: Wed, 10 Dec 2014 23:43:04 +0000 (-0800)
Subject: mm, page_isolation: drain single zone pcplists
X-Git-Tag: firefly_0821_release~176^2~2734^2~149
X-Git-Url: http://demsky.eecs.uci.edu/git/?a=commitdiff_plain;h=ec25af84b23b6862341b5b5b68d24be3f53b8d2c;p=firefly-linux-kernel-4.4.55.git

mm, page_isolation: drain single zone pcplists

When setting MIGRATETYPE_ISOLATE on a pageblock, pcplists are drained to
have a better chance that all pages will be successfully isolated and
not left in the per-cpu caches.  Since isolation is always concerned
with a single zone, we can reduce the pcplists drain to the single zone,
which is now possible.

The change should make memory isolation 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_isolation.c b/mm/page_isolation.c
index f2452e5116b2..72f5ac381ab3 100644
--- a/mm/page_isolation.c
+++ b/mm/page_isolation.c
@@ -68,7 +68,7 @@ out:
 
 	spin_unlock_irqrestore(&zone->lock, flags);
 	if (!ret)
-		drain_all_pages(NULL);
+		drain_all_pages(zone);
 	return ret;
 }