linux-kernel - Re: [PATCH/RFC] Have sane default values for cpusets

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Message-ID: <20100513210738.GV3296@balbir.in.ibm.com>
Date:	Fri, 14 May 2010 02:37:38 +0530
From:	Balbir Singh <balbir@...ux.vnet.ibm.com>
To:	Lennart Poettering <mzxreary@...inter.de>
Cc:	Paul Menage <menage@...gle.com>,
	Peter Zijlstra <peterz@...radead.org>,
	Dhaval Giani <dhaval.giani@...il.com>,
	James Kosin <jkosin@...comgrp.com>,
	linux-kernel@...r.kernel.org, jsafrane@...hat.com,
	tglx@...utronix.de
Subject: Re: [PATCH/RFC] Have sane default values for cpusets

* Lennart Poettering <mzxreary@...inter.de> [2010-05-13 22:41:59]:

> On Thu, 13.05.10 22:36, Lennart Poettering (mzxreary@...inter.de) wrote:
> 
> > On Thu, 13.05.10 13:06, Paul Menage (menage@...gle.com) wrote:
> > 
> > > 
> > > On Thu, May 13, 2010 at 7:03 AM, Lennart Poettering
> > > <mzxreary@...inter.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
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