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



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