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From: Daisuke Nishimura <nishimura@mxp.nes.nec.co.jp>
To: Li Zefan <lizf@cn.fujitsu.com>
Cc: KAMEZAWA Hiroyuki <kamezawa.hiroyu@jp.fujitsu.com>,
	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
Date: Thu, 19 Jun 2008 11:30:58 +0900	[thread overview]
Message-ID: <20080619113058.aba69cbf.nishimura@mxp.nes.nec.co.jp> (raw)
In-Reply-To: <4859AAF8.9060909@cn.fujitsu.com>

On Thu, 19 Jun 2008 08:40:24 +0800, Li Zefan <lizf@cn.fujitsu.com> wrote:
> 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.
> 
My current version is implemented as addon to memory controller,
so it can be used by just mounting memory controller :)

But anyway, this feature might be used in future by some subsystems.


Thanks,
Daisuke Nishimura.


      reply	other threads:[~2008-06-19  2:33 UTC|newest]

Thread overview: 11+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2008-06-18  8:01 Li Zefan
2008-06-18 21:13 ` Paul Menage
2008-06-19  0:43   ` Li Zefan
2008-06-19  1:51   ` [PATCH] cgroup: support checking of subsystem dependencies (v2) Li Zefan
2008-06-20  4:51     ` Paul Menage
2008-07-01  7:51     ` Andrew Morton
2008-07-01  8:43       ` Li Zefan
2008-07-01  8:54         ` Andrew Morton
2008-06-19  0:17 ` [PATCH] cgroup: support checking of subsystem dependencies KAMEZAWA Hiroyuki
2008-06-19  0:40   ` Li Zefan
2008-06-19  2:30     ` Daisuke Nishimura [this message]

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