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From: Tejun Heo <tj@kernel.org>
To: Li Zefan <lizefan@huawei.com>
Cc: containers@lists.linux-foundation.org, cgroups@vger.kernel.org,
	linux-kernel@vger.kernel.org, Neil Horman <nhorman@tuxdriver.com>,
	Thomas Graf <tgraf@suug.ch>,
	"David S. Miller" <davem@davemloft.net>,
	Daniel Borkmann <dborkman@redhat.com>
Subject: Re: [PATCH 1/6] cgroup: make CONFIG_NET_CLS_CGROUP and CONFIG_NETPRIO_CGROUP bool instead of tristate
Date: Sat, 18 Jan 2014 10:10:06 -0500	[thread overview]
Message-ID: <20140118151006.GF3640@htj.dyndns.org> (raw)
In-Reply-To: <52D9D421.6040608@huawei.com>

Hey,

On Sat, Jan 18, 2014 at 09:08:49AM +0800, Li Zefan wrote:
> Cc: Daniel Borkmann <dborkman@redhat.com>
> 
> On 2014/1/18 2:11, Tejun Heo wrote:
> > net_cls and net_prio are the only cgroups which are allowed to be
> > built as modules.  The savings from allowing the two controllers to be
> > built as modules are tiny especially given that cgroup module support
> > itself adds quite a bit of complexity.
> > 
> > The following are the sizes of vmlinux with both built as module and
> > both built as part of the kernel image with cgroup module support
> > removed.
> > 
> > 	text		data		bss		dec
> > 	20292207	2411496		10784768	33488471
> > 	20293421	2412568		10784768	33490757
> > 
> > The total difference is 2286 bytes.  Given that none of other
> > controllers has much chance of being made a module and that we're
> > unlikely to add new modular controllers, the added complexity is
> > simply not justifiable.
> > 
> > As a first step to drop cgroup module support, this patch changes the
> > two config options to bool from tristate and drops module related code
> > from the two controllers.
> > 
> 
> I sugguested Daniel to do this for net_cls, and the change has been in
> net-next.
> 
> https://git.kernel.org/cgit/linux/kernel/git/davem/net-next.git/commit/?id=fe1217c4f3f7d7cbf8efdd8dd5fdc7204a1d65a8
> 
> I was planning to remove module support after that change goes into
> upstream. :)

Ooh, cool. :)

Unless there's gonna be another rc, I think it's already a bit too
late for 3.14 anyway.  I'll drop the net_cls part and rebase the
changes on top of rc1 later on.

Thanks.

-- 
tejun

  parent reply	other threads:[~2014-01-18 15:10 UTC|newest]

Thread overview: 18+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2014-01-17 18:11 [PATCHSET cgroup/for-3.14] cgroup: drop module support and cgroup_root_mutex Tejun Heo
2014-01-17 18:11 ` [PATCH 1/6] cgroup: make CONFIG_NET_CLS_CGROUP and CONFIG_NETPRIO_CGROUP bool instead of tristate Tejun Heo
2014-01-17 20:37   ` Neil Horman
2014-01-18  1:08   ` Li Zefan
2014-01-18 11:25     ` Daniel Borkmann
2014-01-18 15:10     ` Tejun Heo [this message]
2014-01-18 15:26       ` Daniel Borkmann
2014-01-18 15:28         ` Tejun Heo
2014-01-18 15:29           ` Daniel Borkmann
2014-01-18  3:10   ` David Miller
2014-01-17 18:11 ` [PATCH 2/6] cgroup: drop module support Tejun Heo
2014-01-17 18:11 ` [PATCH 3/6] cgroup: clean up cgroup_subsys names and initialization Tejun Heo
2014-01-17 20:49   ` Neil Horman
2014-01-18  3:10   ` David Miller
2014-01-20 13:13   ` Michal Hocko
2014-01-17 18:11 ` [PATCH 4/6] cgroup: rename cgroup_subsys->subsys_id to ->id Tejun Heo
2014-01-17 18:11 ` [PATCH 5/6] cgroup: update locking in cgroup_show_options() Tejun Heo
2014-01-17 18:11 ` [PATCH 6/6] cgroup: remove cgroup_root_mutex Tejun Heo

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