Re: [PATCH v2 1/1] mm, memcg: inline mem_cgroup_{charge/uncharge} to improve disabled memcg config

Shakeel Butt
2021-07-09T17:27:16Z

On Fri, Jul 9, 2021 at 10:15 AM Suren Baghdasaryan <surenb@google.com> wrote:
>
> Inline mem_cgroup_{charge/uncharge} and mem_cgroup_uncharge_list functions
> functions to perform mem_cgroup_disabled static key check inline before
> calling the main body of the function. This minimizes the memcg overhead
> in the pagefault and exit_mmap paths when memcgs are disabled using
> cgroup_disable=memory command-line option.
> This change results in ~0.4% overhead reduction when running PFT test
> comparing {CONFIG_MEMCG=n} against {CONFIG_MEMCG=y, cgroup_disable=memory}
> configurationon on an 8-core ARM64 Android device.
>
> Signed-off-by: Suren Baghdasaryan <surenb@google.com>

Reviewed-by: Shakeel Butt <shakeelb@google.com>