linux-kernel - Re: [PATCH] Add cgroup support for enabling controllers at boot time

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Message-Id: <20080307135839.918a849a.kamezawa.hiroyu@jp.fujitsu.com>
Date:	Fri, 7 Mar 2008 13:58:39 +0900
From:	KAMEZAWA Hiroyuki <kamezawa.hiroyu@...fujitsu.com>
To:	balbir@...ux.vnet.ibm.com
Cc:	David Rientjes <rientjes@...gle.com>,
	Paul Menage <menage@...gle.com>,
	Andrew Morton <akpm@...ux-foundation.org>,
	Pavel Emelianov <xemul@...nvz.org>,
	Hugh Dickins <hugh@...itas.com>,
	Sudhir Kumar <skumar@...ux.vnet.ibm.com>,
	YAMAMOTO Takashi <yamamoto@...inux.co.jp>, lizf@...fujitsu.com,
	linux-kernel@...r.kernel.org, taka@...inux.co.jp,
	linux-mm@...ck.org
Subject: Re: [PATCH] Add cgroup support for enabling controllers at boot
 time

On Fri, 07 Mar 2008 10:11:17 +0530
Balbir Singh <balbir@...ux.vnet.ibm.com> wrote:

> David Rientjes wrote:
> > On Fri, 7 Mar 2008, Balbir Singh wrote:
> > 
> >> @@ -3010,3 +3020,16 @@ static void cgroup_release_agent(struct 
> >>  	spin_unlock(&release_list_lock);
> >>  	mutex_unlock(&cgroup_mutex);
> >>  }
> >> +
> >> +static int __init cgroup_disable(char *str)
> >> +{
> >> +	int i;
> >> +	for (i = 0; i < CGROUP_SUBSYS_COUNT; i++) {
> >> +		struct cgroup_subsys *ss = subsys[i];
> >> +		if (!strcmp(str, ss->name)) {
> >> +			ss->disabled = 1;
> >> +			break;
> >> +		}
> >> +	}
> >> +}
> >> +__setup("cgroup_disable=", cgroup_disable);
> > 
> > This doesn't handle spaces very well, so isn't it possible for the name of 
> > a current or future cgroup subsystem to be specified after cgroup_disable= 
> > on the command line and have it disabled by accident?
> > 
> 
Hmm, cmdline like

cgroup_disable=cpu,memory, ...

should be written as

cgroup_disable=cpu cgroup_disable=memory ....

?
Thanks,
-Kame

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