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Date: Fri, 7 Mar 2008 00:56:33 -0800 (PST)
From: David Rientjes <rientjes@google.com>
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To: Paul Menage <menage@google.com>
cc: Balbir Singh <balbir@linux.vnet.ibm.com>,
       Andrew Morton <akpm@linux-foundation.org>,
       Pavel Emelianov <xemul@openvz.org>, Hugh Dickins <hugh@veritas.com>,
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       YAMAMOTO Takashi <yamamoto@valinux.co.jp>, lizf@cn.fujitsu.com,
       linux-kernel@vger.kernel.org, taka@valinux.co.jp, linux-mm@kvack.org,
       KAMEZAWA Hiroyuki <kamezawa.hiroyu@jp.fujitsu.com>
Subject: Re: [PATCH] Add cgroup support for enabling controllers at boot
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On Fri, 7 Mar 2008, Paul Menage wrote:

> >  Since the command line is logically delimited by spaces, you can
> >  accidently disable a subsystem if its name appears in any of your kernel
> >  options following your cgroup_disable= option.
> 
> I think that you're confusing this with things like the very early
> memory init setup parameters, which do operate on the raw commandline.
> 
> By the time anything is passed to a __setup() function, it's already
> been split into separate strings at space boundaries.
> 

Ok, so the cgroup_disable= parameter should be a list of subsystem names 
delimited by anything other than a space that the user wants disabled.  
That makes more sense, thanks.