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

Michal Hocko
2021-10-18T12:27:31Z

[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.

--
Michal Hocko
SUSE Labs