linux-kernel - [PATCH] mm/memcg: swappiness should between 0 and 100

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Message-Id: <1341550312-6815-1-git-send-email-liwp.linux@gmail.com>
Date:	Fri,  6 Jul 2012 12:51:52 +0800
From:	Wanpeng Li <liwp.linux@...il.com>
To:	Andrew Morton <akpm@...ux-foundation.org>
Cc:	Johannes Weiner <hannes@...xchg.org>,
	Michal Hocko <mhocko@...e.cz>,
	KAMEZAWA Hiroyuki <kamezawa.hiroyu@...fujitsu.com>,
	cgroups@...r.kernel.org, linux-mm@...ck.org,
	linux-kernel@...r.kernel.org, Wanpeng Li <liwp.linux@...il.com>
Subject: [PATCH] mm/memcg: swappiness should between 0 and 100

From: Wanpeng Li <liwp@...ux.vnet.ibm.com>

Signed-off-by: Wanpeng Li <liwp.linux@...il.com>
---
 mm/memcontrol.c |    2 +-
 1 files changed, 1 insertions(+), 1 deletions(-)

diff --git a/mm/memcontrol.c b/mm/memcontrol.c
index 5e4d1ab..69a7d45 100644
--- a/mm/memcontrol.c
+++ b/mm/memcontrol.c
@@ -4176,7 +4176,7 @@ static int mem_cgroup_swappiness_write(struct cgroup *cgrp, struct cftype *cft,
 	struct mem_cgroup *memcg = mem_cgroup_from_cont(cgrp);
 	struct mem_cgroup *parent;
 
-	if (val > 100)
+	if (val > 100 || val < 0)
 		return -EINVAL;
 
 	if (cgrp->parent == NULL)
-- 
1.7.5.4

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