linux-kernel - Re: [RFD] Merge task counter into memcg

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Message-ID: <4F863AD5.3010505@parallels.com>
Date:	Wed, 11 Apr 2012 23:15:49 -0300
From:	Glauber Costa <glommer@...allels.com>
To:	Johannes Weiner <hannes@...xchg.org>
CC:	Frederic Weisbecker <fweisbec@...il.com>,
	Hugh Dickins <hughd@...gle.com>,
	Andrew Morton <akpm@...ux-foundation.org>,
	KAMEZAWA Hiroyuki <kamezawa.hiroyu@...fujitsu.com>,
	Tejun Heo <tj@...nel.org>, Daniel Walsh <dwalsh@...hat.com>,
	"Daniel P. Berrange" <berrange@...hat.com>,
	Li Zefan <lizf@...fujitsu.com>,
	LKML <linux-kernel@...r.kernel.org>,
	Cgroups <cgroups@...r.kernel.org>,
	Containers <containers@...ts.linux-foundation.org>
Subject: Re: [RFD] Merge task counter into memcg

On 04/11/2012 10:07 PM, Johannes Weiner wrote:
> You could also twist this around and argue the same for cpu usage and
> make it part of the cpu cgroup, but it doesn't really fit in either
> subsystem, IMO.
I myself really prefer this in the cpu controller.
Besides the bytes vs objects things, Whenever you create a process, at 
some point it will end up in the runqueues to be scheduled. It is a 
natural point of accounting.

Either that, or making it a core feature of cgroups, like limiting the 
number of processes in the tasks file (just have to find a natural way 
to make it hierarchical). It will make more and more sense as people 
seem to be favoring single hierarchies these days. (granted, not a 
settled discussion, so your views may vary)


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