Re: [PATCH RFC 1/2] mm: kmem: optimize get_obj_cgroup_from_current()

[Shakeel Butt]

On Tue, Dec 20, 2022 at 10:28 AM Roman Gushchin
<roman.gushchin@xxxxxxxxx> wrote:
>
> Manually inline memcg_kmem_bypass() and active_memcg() to speed up
> get_obj_cgroup_from_current() by avoiding duplicate in_task() checks
> and active_memcg() readings.
>
> Also add a likely() macro to __get_obj_cgroup_from_memcg():
> obj_cgroup_tryget() should succeed at almost all times except
> a very unlikely race with the memcg deletion path.
>
> Signed-off-by: Roman Gushchin <roman.gushchin@xxxxxxxxx>

Can you please add your performance experiment setup and result of
this patch in the commit description of this patch as well?

Acked-by: Shakeel Butt <shakeelb@xxxxxxxxxx>