Re: upstream boot error: WARNING in mem_cgroup_css_alloc

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To: Michal Hocko <mhocko@xxxxxxxx>
Subject: Re: upstream boot error: WARNING in mem_cgroup_css_alloc
From: Johannes Weiner <hannes@xxxxxxxxxxx>
Date: Thu, 13 Aug 2020 11:26:34 -0400
Cc: syzbot <syzbot+35d35ef677516d65bdda@xxxxxxxxxxxxxxxxxxxxxxxxx>, Roman Gushchin <guro@xxxxxx>, akpm@xxxxxxxxxxxxxxxxxxxx, cgroups@xxxxxxxxxxxxxxx, linux-kernel@xxxxxxxxxxxxxxx, linux-mm@xxxxxxxxx, syzkaller-bugs@xxxxxxxxxxxxxxxx, vdavydov.dev@xxxxxxxxx
In-reply-to: <20200813104416.GE9477@dhcp22.suse.cz>
References: <00000000000019317f05acbf31bd@google.com> <20200813104416.GE9477@dhcp22.suse.cz>

On Thu, Aug 13, 2020 at 12:44:16PM +0200, Michal Hocko wrote:
> This smells like 3e38e0aaca9e ("mm: memcg: charge memcg percpu memory to
> the parent cgroup").

I just replied to the other thread on this issue here:

https://lore.kernel.org/lkml/20200813152033.GA701678@xxxxxxxxxxx/

References:
- upstream boot error: WARNING in mem_cgroup_css_alloc
  - From: syzbot
- Re: upstream boot error: WARNING in mem_cgroup_css_alloc
  - From: Michal Hocko

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