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Subject: Re: [PATCH 2/7] cgroups: Allow to bind a subsystem to a cgroup
 hierarchy
From: Peter Zijlstra <peterz@infradead.org>
To: Li Zefan <lizf@cn.fujitsu.com>
Cc: "akpm >> Andrew Morton" <akpm@linux-foundation.org>,
        Paul Menage <menage@google.com>, Stephane Eranian <eranian@google.com>,
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Date: Fri, 22 Oct 2010 14:47:11 +0200
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On Fri, 2010-10-22 at 16:09 +0800, Li Zefan wrote:
> For example, we can't decide a cgroup's cpuset.mems and
> cpuset.cpus automatically, so cpuset is not bindable. 

You mean to say that you cannot add cpuset to an existing hierarchy
right? Not that you cannot add perf/cpuacct to an existing cpuset
hierarchy?