linux-kernel - Re: [RFC REPOST] cgroup: removing css reference drain wait during cgroup removal

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Message-ID: <4F6068F4.4090909@parallels.com>
Date:	Wed, 14 Mar 2012 13:46:28 +0400
From:	Glauber Costa <glommer@...allels.com>
To:	KAMEZAWA Hiroyuki <kamezawa.hiroyu@...fujitsu.com>
CC:	Tejun Heo <tj@...nel.org>, Michal Hocko <mhocko@...e.cz>,
	Johannes Weiner <hannes@...xchg.org>, <gthelen@...gle.com>,
	Hugh Dickins <hughd@...gle.com>, <linux-mm@...ck.org>,
	<linux-kernel@...r.kernel.org>, Vivek Goyal <vgoyal@...hat.com>,
	Jens Axboe <axboe@...nel.dk>, Li Zefan <lizf@...fujitsu.com>,
	<containers@...ts.linux-foundation.org>, <cgroups@...r.kernel.org>,
	Peter Zijlstra <a.p.zijlstra@...llo.nl>
Subject: Re: [RFC REPOST] cgroup: removing css reference drain wait during
 cgroup removal

On 03/14/2012 04:28 AM, KAMEZAWA Hiroyuki wrote:
> IIUC, in general, even in the processes are in a tree, in major case
> of servers, their workloads are independent.
> I think FLAT mode is the dafault. 'heararchical' is a crazy thing which
> cannot be managed.

Better pay attention to the current overall cgroups discussions being 
held by Tejun then. ([RFD] cgroup: about multiple hierarchies)

The topic of whether of adapting all cgroups to be hierarchical by 
deafult is a recurring one.

I personally think that it is not unachievable to make res_counters 
cheaper, therefore making this less of a problem.

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