linux-kernel - Re: [patch 0/2] cpusets, cpu_cgroup: disallow attaching kthreadd

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Message-ID: <1334402900.2528.69.camel@twins>
Date:	Sat, 14 Apr 2012 13:28:20 +0200
From:	Peter Zijlstra <a.p.zijlstra@...llo.nl>
To:	David Rientjes <rientjes@...gle.com>
Cc:	Tejun Heo <tj@...nel.org>, Mike Galbraith <mgalbraith@...e.de>,
	Andrew Morton <akpm@...ux-foundation.org>,
	Ingo Molnar <mingo@...hat.com>,
	Paul Menage <paul@...lmenage.org>,
	LKML <linux-kernel@...r.kernel.org>,
	Li Zefan <lizefan@...wei.com>
Subject: Re: [patch 0/2] cpusets, cpu_cgroup: disallow attaching kthreadd

On Fri, 2012-04-06 at 13:46 -0700, David Rientjes wrote:
> That doesn't work, the kmem extension to memcg does not allow slab to be 
> properly accounted to threads in the root memcg.  From 
> Documentation/cgroups/memory.txt section 2.7:
> 
> "Kernel memory limits are not imposed for the root cgroup. Usage for the 
> root cgroup may or may not be accounted." 

To me that reads like: kmem/memcg is broken.
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