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Date: Fri, 14 May 2010 02:37:38 +0530
From: Balbir Singh <balbir@linux.vnet.ibm.com>
To: Lennart Poettering <mzxreary@0pointer.de>
Cc: Paul Menage <menage@google.com>, Peter Zijlstra <peterz@infradead.org>,
       Dhaval Giani <dhaval.giani@gmail.com>,
       James Kosin <jkosin@intcomgrp.com>, linux-kernel@vger.kernel.org,
       jsafrane@redhat.com, tglx@linutronix.de
Subject: Re: [PATCH/RFC] Have sane default values for cpusets
Message-ID: <20100513210738.GV3296@balbir.in.ibm.com>
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* Lennart Poettering <mzxreary@0pointer.de> [2010-05-13 22:41:59]:

> On Thu, 13.05.10 22:36, Lennart Poettering (mzxreary@0pointer.de) wrote:
> 
> > On Thu, 13.05.10 13:06, Paul Menage (menage@google.com) wrote:
> > 
> > > 
> > > On Thu, May 13, 2010 at 7:03 AM, Lennart Poettering
> > > <mzxreary@0pointer.de> wrote:
> > > > By default systemd will create its groups in the "debug" hierarchy, (at
> > > > least for now, in the long run i'd like to see "noop" hierarchy or so,
> > > > that doesn't sound so temporary), since that controller is not useful
> > > 
> > > If you just want to track processes, mount a (named) hierarchy with no
> > > attached subsystems.
> > 
> > Oh, that is possible? How would I do that? 
> > 
> > This certainly doesn't work:
> > 
> > # mount waldo -t cgroup /tmp/xxxx -o defaults
> 
> An neither does this:
> 
> # mount waldo -t cgroup /tmp/xxxx -o name=systemd
> 
> (the mount() syscall fails with EINVAL here, the other one fails with EBUSY)
>

Can you try the command below

mount -t cgroup cgroup -o none,name=hello /cgroup/ 

Works for me.

-- 
	Three Cheers,
	Balbir