Re: [PATCH 1/6] cgroup: make CONFIG_NET_CLS_CGROUP and CONFIG_NETPRIO_CGROUP bool instead of tristate

Neil Horman
2014-01-17T20:38:01Z

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@kernel.org>
> Cc: Neil Horman <nhorman@tuxdriver.com>
> Cc: Thomas Graf <tgraf@suug.ch>
> Cc: "David S. Miller" <davem@davemloft.net>
Acked-by: Neil Horman <nhorman@tuxdriver.com>