linux-kernel - Re: [PATCH 1/6] cgroup: make CONFIG_NET_CLS_CGROUP and CONFIG_NETPRIO

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Message-ID: <20140117203738.GE19452@hmsreliant.think-freely.org>
Date:	Fri, 17 Jan 2014 15:37:38 -0500
From:	Neil Horman <nhorman@...driver.com>
To:	Tejun Heo <tj@...nel.org>
Cc:	lizefan@...wei.com, containers@...ts.linux-foundation.org,
	cgroups@...r.kernel.org, linux-kernel@...r.kernel.org,
	Thomas Graf <tgraf@...g.ch>,
	"David S. Miller" <davem@...emloft.net>
Subject: Re: [PATCH 1/6] cgroup: make CONFIG_NET_CLS_CGROUP and
 CONFIG_NETPRIO_CGROUP bool instead of tristate

On Fri, Jan 17, 2014 at 01:11:52PM -0500, 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.
> 
> Signed-off-by: Tejun Heo <tj@...nel.org>
> Cc: Neil Horman <nhorman@...driver.com>
> Cc: Thomas Graf <tgraf@...g.ch>
> Cc: "David S. Miller" <davem@...emloft.net>
Acked-by: Neil Horman <nhorman@...driver.com>

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