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From: Tejun Heo <tj@kernel.org>
To: KAMEZAWA Hiroyuki <kamezawa.hiroyu@jp.fujitsu.com>
Cc: "linux-mm@kvack.org" <linux-mm@kvack.org>,
	"cgroups@vger.kernel.org" <cgroups@vger.kernel.org>,
	Michal Hocko <mhocko@suse.cz>,
	Johannes Weiner <hannes@cmpxchg.org>,
	Glauber Costa <glommer@parallels.com>,
	Hugh Dickins <hughd@google.com>,
	Andrew Morton <akpm@linux-foundation.org>
Subject: Re: [PATCH 6/7] memcg: remove pre_destroy()
Date: Mon, 16 Apr 2012 15:38:00 -0700	[thread overview]
Message-ID: <20120416223800.GF12421@google.com> (raw)
In-Reply-To: <4F86BCCE.5050802@jp.fujitsu.com>

Hello,

On Thu, Apr 12, 2012 at 08:30:22PM +0900, KAMEZAWA Hiroyuki wrote:
> +/*
> + * This function is called after ->destroy(). So, we cannot access cgroup
> + * of this memcg.
> + */
> +static void mem_cgroup_recharge(struct work_struct *work)

So, ->pre_destroy per-se isn't gonna go away.  It's just gonna be this
callback which cgroup core uses to unilaterally notify that the cgroup
is going away, so no need to do this cleanup asynchronously from
->destroy().  It's okay to keep doing it synchronously from
->pre_destroy().  The only thing is that it can't fail.

Thanks.

-- 
tejun

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  reply	other threads:[~2012-04-16 22:38 UTC|newest]

Thread overview: 67+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2012-04-12 11:17 [PATCH v1 0/7] memcg remove pre_destroy KAMEZAWA Hiroyuki
2012-04-12 11:20 ` [PATCH 1/7] res_counter: add a function res_counter_move_parent() KAMEZAWA Hiroyuki
2012-04-12 11:20   ` KAMEZAWA Hiroyuki
2012-04-12 13:22   ` Glauber Costa
2012-04-12 14:30     ` Frederic Weisbecker
2012-04-13  0:57       ` KAMEZAWA Hiroyuki
2012-04-13  0:57         ` KAMEZAWA Hiroyuki
2012-04-13  1:04         ` Frederic Weisbecker
2012-04-13  1:04           ` Frederic Weisbecker
2012-04-13  1:05           ` KAMEZAWA Hiroyuki
2012-04-16 22:19   ` Tejun Heo
2012-04-16 22:19     ` Tejun Heo
2012-04-18  6:59     ` KAMEZAWA Hiroyuki
2012-04-18  6:59       ` KAMEZAWA Hiroyuki
2012-04-16 22:31   ` Tejun Heo
2012-04-18  7:04     ` KAMEZAWA Hiroyuki
2012-04-18  7:04       ` KAMEZAWA Hiroyuki
2012-04-18 17:03       ` Tejun Heo
2012-04-18 17:03         ` Tejun Heo
2012-04-12 11:21 ` [PATCH 2/7] memcg: move charge to parent only when necessary KAMEZAWA Hiroyuki
2012-04-12 11:21   ` KAMEZAWA Hiroyuki
2012-04-16 22:21   ` Tejun Heo
2012-04-16 22:21     ` Tejun Heo
2012-04-18  7:01     ` KAMEZAWA Hiroyuki
2012-04-18  7:01       ` KAMEZAWA Hiroyuki
2012-04-12 11:22 ` [PATCH 3/7] memcg: move charges to root at rmdir() KAMEZAWA Hiroyuki
2012-04-12 11:22   ` KAMEZAWA Hiroyuki
2012-04-16 22:30   ` Tejun Heo
2012-04-16 22:30     ` Tejun Heo
2012-04-18  7:02     ` KAMEZAWA Hiroyuki
2012-04-12 11:24 ` [PATCH 4/7] memcg: remove 'uncharge' argument from mem_cgroup_move_account() KAMEZAWA Hiroyuki
2012-04-12 11:24   ` KAMEZAWA Hiroyuki
2012-04-12 13:27   ` Glauber Costa
2012-04-13  1:01     ` KAMEZAWA Hiroyuki
2012-04-12 11:28 ` [PATCH 5/7] memcg: divide force_empty into 2 functions, avoid memory reclaim at rmdir KAMEZAWA Hiroyuki
2012-04-12 11:28   ` KAMEZAWA Hiroyuki
2012-04-12 13:33   ` Glauber Costa
2012-04-17 17:29   ` Ying Han
2012-04-18  7:14     ` KAMEZAWA Hiroyuki
2012-04-18  7:14       ` KAMEZAWA Hiroyuki
2012-04-12 11:30 ` [PATCH 6/7] memcg: remove pre_destroy() KAMEZAWA Hiroyuki
2012-04-12 11:30   ` KAMEZAWA Hiroyuki
2012-04-16 22:38   ` Tejun Heo [this message]
2012-04-18  7:12     ` KAMEZAWA Hiroyuki
2012-04-18  7:12       ` KAMEZAWA Hiroyuki
2012-04-17 17:47   ` Ying Han
2012-04-17 17:47     ` Ying Han
2012-04-12 11:31 ` [PATCH 7/7] memcg: remove drain_all_stock_sync KAMEZAWA Hiroyuki
2012-04-12 11:31   ` KAMEZAWA Hiroyuki
2012-04-12 13:35   ` Glauber Costa
2012-04-12 13:35     ` Glauber Costa
2012-04-12 13:20 ` [PATCH v1 0/7] memcg remove pre_destroy Glauber Costa
2012-04-12 13:20   ` Glauber Costa
2012-04-12 16:06 ` Tejun Heo
2012-04-12 16:06   ` Tejun Heo
2012-04-12 18:57   ` Aneesh Kumar K.V
2012-04-12 18:57     ` Aneesh Kumar K.V
2012-04-12 23:59     ` KAMEZAWA Hiroyuki
2012-04-13  8:50       ` Michal Hocko
2012-04-13  8:50         ` Michal Hocko
2012-04-13 22:19         ` Aneesh Kumar K.V
2012-04-13 22:19           ` Aneesh Kumar K.V
2012-04-16 22:41 ` Tejun Heo
2012-04-16 22:41   ` Tejun Heo
2012-04-17 17:35 ` Ying Han
2012-04-18  7:15   ` KAMEZAWA Hiroyuki
2012-04-18  7:15     ` KAMEZAWA Hiroyuki

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