From: Tejun Heo <tj@kernel.org>
To: Li Zefan <lizefan@huawei.com>
Cc: glommer@parallels.com, lizf@cn.fujitsu.com,
containers@lists.linux-foundation.org, cgroups@vger.kernel.org,
linux-kernel@vger.kernel.org, fweisbec@gmail.com, rni@google.com,
ctalbott@google.com
Subject: Re: [PATCHSET] cgroup: cftype based file interface, take #2
Date: Fri, 30 Mar 2012 08:42:46 -0700 [thread overview]
Message-ID: <20120330154246.GE28934@google.com> (raw)
In-Reply-To: <4F75AA1F.9020007@huawei.com>
Hey, Li.
On Fri, Mar 30, 2012 at 08:42:07PM +0800, Li Zefan wrote:
> > This patch replaces cgroup file interface with cftype based one which
> > allows dynamic additions and removals of cftype arrays whether the
> > target subsystem is attached or not. This can be used to make subsys
> > rebinding via remount work properly but I intentionally avoided doing
> > that at the moment.
>
> What's the problem with remount?
Subsys can't be changed if any non-root cgroup exists.
> and is it important enough that it should be fixed even the feature
> is marked as deprecated?
I'm not sure. We *might* need it during multi-mount -> single-mount
transition depending on how that's implemented, so the "at the moment"
qualifier. It probably won't be fixed but I'm not fully sure.
> > This makes cgroup population simpler for controllers and will be used
> > to allow controllers to be more dynamic. e.g. blkio subsys has
> > sub-policies which may come and go while blkio subsys is attached and
> > it currently uses fixed set of files which stays blank if not in use.
>
> Dynamic cgroup files was mentioned before. The scenario in mind was blkio
> control files can be added/removed automatically as devices come and ago.
>
> So this time blkio subsystem is really going to be made more dynamic
> soon?
Patchset already posted.
http://thread.gmane.org/gmane.linux.kernel.cgroups/1376
Thanks.
--
tejun
next prev parent reply other threads:[~2012-03-30 15:42 UTC|newest]
Thread overview: 29+ messages / expand[flat|nested] mbox.gz Atom feed top
2012-03-21 22:17 [PATCHSET] cgroup: cftype based file interface, take #2 Tejun Heo
2012-03-21 22:17 ` [PATCH 01/12] cgroup: move cgroup_clear_directory() call out of cgroup_populate_dir() Tejun Heo
2012-03-21 22:17 ` [PATCH 02/12] cgroup: build list of all cgroups under a given cgroupfs_root Tejun Heo
2012-03-21 22:17 ` [PATCH 03/12] cgroup: implement cgroup_add_cftypes() and friends Tejun Heo
2012-03-21 22:17 ` [PATCH 04/12] cgroup: merge cft_release_agent cftype array into the base files array Tejun Heo
2012-03-21 22:17 ` [PATCH 05/12] cgroup: relocate cftype and cgroup_subsys definitions in controllers Tejun Heo
2012-03-21 22:17 ` [PATCH 06/12] cgroup: convert all non-memcg controllers to the new cftype interface Tejun Heo
2012-03-21 22:17 ` [PATCH 07/12] memcg: always create memsw files if CONFIG_CGROUP_MEM_RES_CTLR_SWAP Tejun Heo
2012-03-22 0:23 ` KAMEZAWA Hiroyuki
2012-03-21 22:17 ` [PATCH 08/12] cgroup: convert memcg controller to the new cftype interface Tejun Heo
2012-03-22 0:27 ` KAMEZAWA Hiroyuki
2012-03-21 22:17 ` [PATCH 09/12] cgroup: remove cgroup_add_file[s]() Tejun Heo
2012-03-21 22:17 ` [PATCH 10/12] cgroup: relocate __d_cgrp() and __d_cft() Tejun Heo
2012-03-21 22:17 ` [PATCH 11/12] cgroup: introduce struct cfent Tejun Heo
2012-03-30 20:42 ` [PATCH UPDATED " Tejun Heo
2012-03-21 22:17 ` [PATCH 12/12] cgroup: implement cgroup_rm_cftypes() Tejun Heo
2012-03-22 9:04 ` [PATCHSET] cgroup: cftype based file interface, take #2 Glauber Costa
2012-03-30 12:42 ` Li Zefan
2012-03-30 15:42 ` Tejun Heo [this message]
2012-03-31 12:56 ` Li Zefan
2012-03-31 16:30 ` Tejun Heo
2012-03-30 22:29 ` Tejun Heo
2012-03-31 12:44 ` Li Zefan
2012-03-31 16:31 ` Tejun Heo
2012-04-03 3:22 ` Glauber Costa
2012-04-03 18:47 ` Tejun Heo
2012-04-03 18:52 ` Tejun Heo
2012-04-03 20:37 ` Glauber Costa
2012-03-31 16:47 ` Tejun Heo
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