linux-kernel - Re: [RFC][PATCH 4/7 v2] memcg: use res_counter_uncharge_until in move

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Message-ID: <20120427182018.GI26595@google.com>
Date:	Fri, 27 Apr 2012 11:20:18 -0700
From:	Tejun Heo <tj@...nel.org>
To:	KAMEZAWA Hiroyuki <kamezawa.hiroyu@...fujitsu.com>
Cc:	Linux Kernel <linux-kernel@...r.kernel.org>,
	"linux-mm@...ck.org" <linux-mm@...ck.org>,
	"cgroups@...r.kernel.org" <cgroups@...r.kernel.org>,
	Michal Hocko <mhocko@...e.cz>,
	Johannes Weiner <hannes@...xchg.org>,
	Frederic Weisbecker <fweisbec@...il.com>,
	Glauber Costa <glommer@...allels.com>,
	Han Ying <yinghan@...gle.com>,
	"Aneesh Kumar K.V" <aneesh.kumar@...ux.vnet.ibm.com>,
	Andrew Morton <akpm@...ux-foundation.org>,
	kamezawa.hiroyuki@...il.com
Subject: Re: [RFC][PATCH 4/7 v2] memcg: use res_counter_uncharge_until in
 move_parent

On Fri, Apr 27, 2012 at 02:54:58PM +0900, KAMEZAWA Hiroyuki wrote:
> By using res_counter_uncharge_until(), we can avoid 
> unnecessary charging.
> 
> Signed-off-by: KAMEZAWA Hiroyuki <kamezawa.hiroyu@...fujitsu.com>
> ---
>  mm/memcontrol.c |   63 ++++++++++++++++++++++++++++++++++++------------------
>  1 files changed, 42 insertions(+), 21 deletions(-)
> 
> diff --git a/mm/memcontrol.c b/mm/memcontrol.c
> index 613bb15..ed53d64 100644
> --- a/mm/memcontrol.c
> +++ b/mm/memcontrol.c
> @@ -2420,6 +2420,24 @@ static void __mem_cgroup_cancel_charge(struct mem_cgroup *memcg,
>  }
>  
>  /*
> + * Cancel chages in this cgroup....doesn't propagates to parent cgroup.

             ^typo                                     ^ unnecessary s

-- 
tejun
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