Re: [PATCH v1 1/5] mm: kmem: optimize get_obj_cgroup_from_current()

Johannes Weiner
2023-10-03T16:48:44Z

On Fri, Sep 29, 2023 at 11:00:51AM -0700, Roman Gushchin 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 (Cruise) <roman.gushchin@linux.dev>
> Acked-by: Shakeel Butt <shakeelb@google.com>

Acked-by: Johannes Weiner <hannes@cmpxchg.org>