[PATCH V3 2/3] memcg: fix a routine for counting pages in node

From: Ying Han <yinghan@google.com>
To: KOSAKI Motohiro <kosaki.motohiro@jp.fujitsu.com>,
	Minchan Kim <minchan.kim@gmail.com>,
	Daisuke Nishimura <nishimura@mxp.nes.nec.co.jp>,
	Balbir Singh <balbir@linux.vnet.ibm.com>,
	Tejun Heo <tj@kernel.org>, Pavel Emelyanov <xemul@openvz.org>,
	KAMEZAWA Hiroyuki <kamezawa.hiroyu@jp.fujitsu.com>,
	Andrew Morton <akpm@linux-foundation.org>,
	Li Zefan <lizf@cn.fujitsu.com>, Mel Gorman <mel@csn.ul.ie>,
	Christoph Lameter <cl@linux.com>,
	Johannes Weiner <hannes@cmpxchg.org>,
	Rik van Riel <riel@redhat.com>, Hugh Dickins <hughd@google.com>,
	Michal Hocko <mhocko@suse.cz>,
	Dave Hansen <dave@linux.vnet.ibm.com>,
	Zhu Yanhai <zhu.yanhai@gmail.com>
Cc: linux-mm@kvack.org
Subject: [PATCH V3 2/3] memcg: fix a routine for counting pages in node
Date: Thu, 19 May 2011 10:32:39 -0700	[thread overview]
Message-ID: <1305826360-2167-2-git-send-email-yinghan@google.com> (raw)
In-Reply-To: <1305826360-2167-1-git-send-email-yinghan@google.com>

The value for counter base should be initialized. If not,
this returns wrong value.

Signed-off-by: KAMEZAWA Hiroyuki <kamezawa.hiroyu@jp.fujitsu.com>
---
 mm/memcontrol.c |    2 +-
 1 files changed, 1 insertions(+), 1 deletions(-)

diff --git a/mm/memcontrol.c b/mm/memcontrol.c
index da183dc..e14677c 100644
--- a/mm/memcontrol.c
+++ b/mm/memcontrol.c
@@ -679,7 +679,7 @@ static unsigned long
 mem_cgroup_get_zonestat_node(struct mem_cgroup *mem, int nid, enum lru_list idx)
 {
 	struct mem_cgroup_per_zone *mz;
-	u64 total;
+	u64 total = 0;
 	int zid;
 
 	for (zid = 0; zid < MAX_NR_ZONES; zid++) {
-- 
1.7.3.1

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