Re: [PATCH memcg 0/1] false global OOM triggered by memcg-limited task

Shakeel Butt
2021-10-18T15:07:20Z

On Mon, Oct 18, 2021 at 5:27 AM Michal Hocko <mhocko-IBi9RG/b67k@public.gmane.org> wrote:
>
> [restore the cc list]
>
> On Mon 18-10-21 15:14:26, Vasily Averin wrote:
> > On 18.10.2021 14:53, Michal Hocko wrote:
> > > On Mon 18-10-21 13:05:35, Vasily Averin wrote:
> > >> On 18.10.2021 12:04, Michal Hocko wrote:
> > >> Here we call try_charge_memcg() that return success and approve the allocation,
> > >> however then we hit into kmem limit and fail the allocation.
> > >
> > > Just to make sure I understand this would be for the v1 kmem explicit
> > > limit, correct?
> >
> > yes, I mean this limit.
>
> OK, thanks for the clarification. This is a known problem. Have a look
> at I think we consider that one to 0158115f702b ("memcg, kmem: deprecate
> kmem.limit_in_bytes"). We are reporting the deprecated and to-be removed
> status since 2019 without any actual report sugested by the kernel
> message. Maybe we should try and remove it and see whether that prompts
> some pushback.
>

Yes, I think now should be the right time to take the next step for