linux-kernel - Re: [External] Re: [RFC PATCH 00/15] Use obj

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Message-ID: <CAMZfGtVdbu96msmft8k8+uGh4-ttYR4zyyZU_yRSpBU_vxhAcg@mail.gmail.com>
Date:   Fri, 2 Apr 2021 11:14:23 +0800
From:   Muchun Song <songmuchun@...edance.com>
To:     Shakeel Butt <shakeelb@...gle.com>
Cc:     Johannes Weiner <hannes@...xchg.org>, Roman Gushchin <guro@...com>,
        Greg Thelen <gthelen@...gle.com>,
        Michal Hocko <mhocko@...nel.org>,
        Andrew Morton <akpm@...ux-foundation.org>,
        Vladimir Davydov <vdavydov.dev@...il.com>,
        LKML <linux-kernel@...r.kernel.org>,
        Linux MM <linux-mm@...ck.org>,
        Xiongchun duan <duanxiongchun@...edance.com>
Subject: Re: [External] Re: [RFC PATCH 00/15] Use obj_cgroup APIs to charge
 the LRU pages

On Fri, Apr 2, 2021 at 1:15 AM Shakeel Butt <shakeelb@...gle.com> wrote:
>
> On Thu, Apr 1, 2021 at 9:08 AM Muchun Song <songmuchun@...edance.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.

Yeah. Reducing the zombie memcg is not the final destination.
But it is an optimization. OK. The discussions about sharing/reusing
is also welcome.

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

No problem. I will cc Alex Shi in the next version.