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

[Wanpeng Li]

From: Wanpeng Li <liwp@xxxxxxxxxxxxxxxxxx>

Signed-off-by: Wanpeng Li <liwp.linux@xxxxxxxxx>
---
 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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