linux-kernel - Re: [PATH v2] cgroup: add cgroup_favordynmods= command-line option

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Message-ID: <lqcl5cblo3s45afvtgqjkbz2an3zwccsckglhpe3ufyffqavjk@ui45m6itz4ne>
Date:   Thu, 7 Sep 2023 17:06:48 +0200
From:   Michal Koutný <mkoutny@...e.com>
To:     Luiz Capitulino <luizcap@...zon.com>
Cc:     tj@...nel.org, lizefan.x@...edance.com, hannes@...xchg.org,
        cgroups@...r.kernel.org, linux-kernel@...r.kernel.org,
        longman@...hat.com, lcapitulino@...il.com
Subject: Re: [PATH v2] cgroup: add cgroup_favordynmods= command-line option

On Wed, Sep 06, 2023 at 12:57:12AM +0000, Luiz Capitulino <luizcap@...zon.com> wrote:
> We have a need of using favordynmods with cgroup v1, which doesn't support
> changing mount flags during remount. Enabling CONFIG_FAVOR_DYNMODS at
> build-time is not an option because we want to be able to selectively
> enable it for certain systems.

Could this be implemented by a utility that would read /proc/cmdline
(while kernel ignores the arg) and remount respective hierarchies
accordingly? Or what do I miss?

Thanks,
Michal

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