linux-kernel - Re: [PATCH v4 0/4] cgroups: support for module-loadable subsystems

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Message-Id: <20100107120732.97d502bd.kamezawa.hiroyu@jp.fujitsu.com>
Date:	Thu, 7 Jan 2010 12:07:32 +0900
From:	KAMEZAWA Hiroyuki <kamezawa.hiroyu@...fujitsu.com>
To:	Ben Blum <bblum@...rew.cmu.edu>
Cc:	Andrew Morton <akpm@...ux-foundation.org>, menage@...gle.com,
	containers@...ts.linux-foundation.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH v4 0/4] cgroups: support for module-loadable subsystems

On Wed, 6 Jan 2010 20:26:06 -0500
Ben Blum <bblum@...rew.cmu.edu> wrote:

> On Wed, Jan 06, 2010 at 04:04:14PM -0800, Andrew Morton wrote:
> > On Thu, 31 Dec 2009 00:10:50 -0500
> > Ben Blum <bblum@...rew.cmu.edu> wrote:
> > 
> > > This patch series implements support for building, loading, and
> > > unloading subsystems as modules, both within and outside the kernel
> > > source tree. It provides an interface cgroup_load_subsys() and
> > > cgroup_unload_subsys() which modular subsystems can use to register and
> > > depart during runtime. The net_cls classifier subsystem serves as the
> > > example for a subsystem which can be converted into a module using these
> > > changes.
> > 
> > What is the value in this?  What are the usage scenarios?  Why does the
> > benefit of this change exceed the cost/risk/etc of merging it?
> 
> As discussed in the first posting of these patches, this provides the
> ability for arbitrary subsystems to be used with cgroups.. cls_cgroup
> would have already been a module except for a lack of support from
> cgroups, and the change also allows other module-loadable classifiers
> to add subsystems of their own.

Hmm, do you have your own module in plan ?

Thanks,
-Kame

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