Re: [PATCH RFC 4/4] mm: kmem: enable kernel memcg accounting from interrupt contexts

Shakeel Butt
2020-08-27T22:02:59Z

On Thu, Aug 27, 2020 at 10:52 AM Roman Gushchin <guro@fb.com> wrote:
>
> If a memcg to charge can be determined (using remote charging API),
> there are no reasons to exclude allocations made from an interrupt
> context from the accounting.
>
> Such allocations will pass even if the resulting memcg size will
> exceed the hard limit, but it will affect the application of the
> memory pressure and an inability to put the workload under the limit
> will eventually trigger the OOM.
>
> To use active_memcg() helper, memcg_kmem_bypass() is moved back
> to memcontrol.c.
>
> Signed-off-by: Roman Gushchin <guro@fb.com>

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