Re: [PATCH 2/2] mm, memcg: Optionally disable memcg by default using Kconfig

[Davidlohr Bueso <dave@stgolabs.net>]

On Wed, 2015-05-20 at 13:50 +0100, Mel Gorman wrote:
> +config MEMCG_DEFAULT_ENABLED
> +	bool "Automatically enable memory resource controller"
> +	default y
> +	depends on MEMCG
> +	help
> +	  The memory controller has some overhead even if idle as resource
> +	  usage must be tracked in case a group is created and a process
> +	  migrated. As users may not be aware of this and the cgroup_disable=
> +	  option, this config option controls whether it is enabled by
> +	  default. It is assumed that someone that requires the controller
> +	  can find the cgroup_enable= switch.
> +
> +	  Say N if unsure. This is default Y to preserve oldconfig and
> +	  historical behaviour.

Out of curiosity, how do you expect distros to handle this? I mean, this
is a pretty general functionality and customers won't want to be
changing kernels (they may or may not use memcg). iow, will this ever be
disabled?

Thanks,
Davidlohr