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

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Date:	Fri, 6 Jul 2012 13:04:30 +0800
From:	Gavin Shan <shangw@...ux.vnet.ibm.com>
To:	Gavin Shan <shangw@...ux.vnet.ibm.com>
Cc:	Wanpeng Li <liwp.linux@...il.com>,
	Andrew Morton <akpm@...ux-foundation.org>,
	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
Subject: Re: [PATCH] mm/memcg: swappiness should between 0 and 100

On Fri, Jul 06, 2012 at 01:00:13PM +0800, Gavin Shan wrote:
>On Fri, Jul 06, 2012 at 12:51:52PM +0800, Wanpeng Li wrote:
>>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,
>
>It seems that we don't have the function in mainline.
>
>shangw@...ngw:~/sandbox/linux/mm$ grep mem_cgroup_swappiness_write -r .
>shangw@...ngw:~/sandbox/linux/mm$ 
>

Please ignore that cause my git tree has some problems and everything
in linux/mm has been cleared :-)

Thanks,
Gavin

>Thanks,
>Gavin
>
>> 	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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