From: KOSAKI Motohiro <kosaki.motohiro@jp.fujitsu.com>
Date: Wed, 11 Aug 2010 01:03:02 +0000 (-0700)
Subject: memcg: sc.nr_to_reclaim should be initialized
X-Git-Tag: firefly_0821_release~9833^2~880
X-Git-Url: http://demsky.eecs.uci.edu/git/?a=commitdiff_plain;h=b8f5c5664d51776d74c84228c4b7165abfa92a18;p=firefly-linux-kernel-4.4.55.git

memcg: sc.nr_to_reclaim should be initialized

Currently, mem_cgroup_shrink_node_zone() initialize sc.nr_to_reclaim as 0.
 It mean shrink_zone() only scan 32 pages and immediately return even if
it doesn't reclaim any pages.

This patch fixes it.

Signed-off-by: KOSAKI Motohiro <kosaki.motohiro@jp.fujitsu.com>
Acked-by: KAMEZAWA Hiroyuki <kamezawa.hiroyu@jp.fujitsu.com>
Acked-by: Mel Gorman <mel@csn.ul.ie>
Cc: Balbir Singh <balbir@in.ibm.com>
Cc: Nishimura Daisuke <d-nishimura@mtf.biglobe.ne.jp>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
---

diff --git a/mm/vmscan.c b/mm/vmscan.c
index ec5ddccbf82e..4e684449bf40 100644
--- a/mm/vmscan.c
+++ b/mm/vmscan.c
@@ -1972,6 +1972,7 @@ unsigned long mem_cgroup_shrink_node_zone(struct mem_cgroup *mem,
 						struct zone *zone, int nid)
 {
 	struct scan_control sc = {
+		.nr_to_reclaim = SWAP_CLUSTER_MAX,
 		.may_writepage = !laptop_mode,
 		.may_unmap = 1,
 		.may_swap = !noswap,