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

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Message-ID: <20120706050013.GA15372@shangw>
Date:	Fri, 6 Jul 2012 13:00:13 +0800
From:	Gavin Shan <shangw@...ux.vnet.ibm.com>
To:	Wanpeng Li <liwp.linux@...il.com>
Cc:	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 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$ 

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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