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Message-ID: <ZLmRlTej8Tm82kXG@slm.duckdns.org>
Date:   Thu, 20 Jul 2023 09:57:09 -1000
From:   Tejun Heo <tj@...nel.org>
To:     Johannes Weiner <hannes@...xchg.org>
Cc:     Yosry Ahmed <yosryahmed@...gle.com>,
        Andrew Morton <akpm@...ux-foundation.org>,
        Michal Hocko <mhocko@...nel.org>,
        Roman Gushchin <roman.gushchin@...ux.dev>,
        Shakeel Butt <shakeelb@...gle.com>,
        Muchun Song <muchun.song@...ux.dev>,
        "Matthew Wilcox (Oracle)" <willy@...radead.org>,
        Zefan Li <lizefan.x@...edance.com>,
        Yu Zhao <yuzhao@...gle.com>,
        Luis Chamberlain <mcgrof@...nel.org>,
        Kees Cook <keescook@...omium.org>,
        Iurii Zaikin <yzaikin@...gle.com>,
        "T.J. Mercier" <tjmercier@...gle.com>,
        Greg Thelen <gthelen@...gle.com>, linux-kernel@...r.kernel.org,
        linux-mm@...ck.org, cgroups@...r.kernel.org
Subject: Re: [RFC PATCH 0/8] memory recharging for offline memcgs

On Thu, Jul 20, 2023 at 11:35:15AM -0400, Johannes Weiner wrote:
> It could also be argued that if you don't want to lose control over a
> set of resources, then maybe don't delete their control domain while
> they are still alive and in use. For example, when restarting a
> workload, and the new instance is expected to have largely the same
> workingset, consider reusing the cgroup instead of making a new one.

Or just create a nesting layer so that there's a cgroup which represents the
persistent resources and a nested cgroup instance inside representing the
current instance.

Thanks.

-- 
tejun

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