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From:   Shakeel Butt <shakeelb@google.com>
Date:   Thu, 1 Apr 2021 10:15:45 -0700
Message-ID: <CALvZod6EeDeb8S-LT8BgFP=KqUKqGS-EnRTKCy+ajAthMC2Vfw@mail.gmail.com>
Subject: Re: [External] Re: [RFC PATCH 00/15] Use obj_cgroup APIs to charge
 the LRU pages
To:     Muchun Song <songmuchun@bytedance.com>
Cc:     Johannes Weiner <hannes@cmpxchg.org>, Roman Gushchin <guro@fb.com>,
        Greg Thelen <gthelen@google.com>,
        Michal Hocko <mhocko@kernel.org>,
        Andrew Morton <akpm@linux-foundation.org>,
        Vladimir Davydov <vdavydov.dev@gmail.com>,
        LKML <linux-kernel@vger.kernel.org>,
        Linux MM <linux-mm@kvack.org>,
        Xiongchun duan <duanxiongchun@bytedance.com>
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On Thu, Apr 1, 2021 at 9:08 AM Muchun Song <songmuchun@bytedance.com> wrote:
>
[...]
> > The zombie issue is a pretty urgent concern that has caused several
> > production emergencies now. It needs a fix sooner rather than later.
>
> Thank you very much for clarifying the problem for me. I do agree
> with you. This issue should be fixed ASAP. Using objcg is a good
> choice. Dying objcg should not be a problem. Because the size of
> objcg is so small compared to memcg.
>

Just wanted to say out loud that yes this patchset will reduce the
memcg zombie issue but this is not the final destination. We should
continue the discussions on sharing/reusing scenarios.

Muchun, can you please also CC Hugh Dickins and Alex Shi in the next
version of your patchset?