Subject: Re: mm: mkfs.ext4 invoked oom-killer on i386 - pagecache_get_page

From: Michal Hocko <[email-masked]>
Date: Thu, 28 May 2020 17:03:10 +0200

On Fri 22-05-20 02:23:09, Naresh Kamboju wrote:
> My apology !
> As per the test results history this problem started happening from
> Bad : next-20200430 (still reproducible on next-20200519)
> Good : next-20200429
> 
> The git tree / tag used for testing is from linux next-20200430 tag and reverted
> following three patches and oom-killer problem fixed.
> 
> Revert "mm, memcg: avoid stale protection values when cgroup is above
> protection"
> Revert "mm, memcg: decouple e{low,min} state mutations from protectinn checks"
> Revert "mm-memcg-decouple-elowmin-state-mutations-from-protection-checks-fix"

The discussion has fragmented and I got lost TBH.
In http://lkml.kernel.org/r/[email-masked]
you have said that none of the added tracing output has triggered. Does
this still hold? Because I still have a hard time to understand how
those three patches could have the observed effects.
-- 
Michal Hocko
SUSE Labs