linux-kernel - Re: [PATCH] memcg: mem_cgroup_shrink_usage css

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Message-Id: <20080630112704.632d2f6d.kamezawa.hiroyu@jp.fujitsu.com>
Date:	Mon, 30 Jun 2008 11:27:04 +0900
From:	KAMEZAWA Hiroyuki <kamezawa.hiroyu@...fujitsu.com>
To:	Hugh Dickins <hugh@...itas.com>
Cc:	Andrew Morton <akpm@...ux-foundation.org>,
	Balbir Singh <balbir@...ibm.com>, linux-kernel@...r.kernel.org
Subject: Re: [PATCH] memcg: mem_cgroup_shrink_usage css_put

On Sun, 29 Jun 2008 01:15:38 +0100 (BST)
Hugh Dickins <hugh@...itas.com> wrote:

> mem_cgroup_shrink_usage makes no charge: balance its css_get with a css_put.
> 
> Signed-off-by: Hugh Dickins <hugh@...itas.com>

Sorry for my mistakes

Acked-by: KAMEZAWA Hiroyuki <kamezawa.hiroyu@...fujitsu.com>


> ---
> Should follow mmotm's memcg-helper-function-for-relcaim-from-shmem.patch
> 
>  mm/memcontrol.c |    1 +
>  1 file changed, 1 insertion(+)
> 
> --- mmotm/mm/memcontrol.c	2008-06-27 13:39:20.000000000 +0100
> +++ linux/mm/memcontrol.c	2008-06-27 17:32:29.000000000 +0100
> @@ -801,6 +801,7 @@ int mem_cgroup_shrink_usage(struct mm_st
>  		progress = try_to_free_mem_cgroup_pages(mem, gfp_mask);
>  	} while (!progress && --retry);
>  
> +	css_put(&mem->css);
>  	if (!retry)
>  		return -ENOMEM;
>  	return 0;
> --
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