Message-ID: <4859AAF8.9060909@cn.fujitsu.com>
Date: Thu, 19 Jun 2008 08:40:24 +0800
From: Li Zefan <lizf@cn.fujitsu.com>
User-Agent: Thunderbird 2.0.0.9 (X11/20071115)
MIME-Version: 1.0
To: KAMEZAWA Hiroyuki <kamezawa.hiroyu@jp.fujitsu.com>
CC: Andrew Morton <akpm@linux-foundation.org>, Paul Menage <menage@google.com>,
       LKML <linux-kernel@vger.kernel.org>,
       "containers@lists.osdl.org" <containers@lists.osdl.org>,
       Balbir Singh <balbir@linux.vnet.ibm.com>, Paul Jackson <pj@sgi.com>
Subject: Re: [PATCH] cgroup: support checking of subsystem dependencies
References: <4858C0ED.2080905@cn.fujitsu.com> <20080619091714.320fdaa6.kamezawa.hiroyu@jp.fujitsu.com>
In-Reply-To: <20080619091714.320fdaa6.kamezawa.hiroyu@jp.fujitsu.com>
Content-Type: text/plain; charset=ISO-8859-1
Content-Transfer-Encoding: 7bit
Sender: linux-kernel-owner@vger.kernel.org
Content-Length: 932
Lines: 24

KAMEZAWA Hiroyuki wrote:
> On Wed, 18 Jun 2008 16:01:49 +0800
> Li Zefan <lizf@cn.fujitsu.com> wrote:
> 
>> This allows one subsystem to require that it only be mounted when some
>> other subsystems are also present in the proposed hierarchy.
>>
>> For example if subsystem foo depends on bar, the following will fail:
>>  # mount -t cgroup -ofoo xxx /dev/cgroup
>>
>> You should mount with both subsystems:
>>  # mount -t cgroup -ofoo,bar xxx /dev/cgroup
>>
> I'm just curious. May I ask "Is there such cgroup subsystem now ?"
> 

Currently no, but people who are developing or wants to develop new subsystems
may find this useful, for example Daisuke Nishimura-san's swap controller.

--
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@vger.kernel.org
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Please read the FAQ at  http://www.tux.org/lkml/