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

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Message-ID: <ZQiNIWQe7spOwjil@slm.duckdns.org>
Date:   Mon, 18 Sep 2023 07:47:13 -1000
From:   Tejun Heo <tj@...nel.org>
To:     Luiz Capitulino <luizcap@...zon.com>
Cc:     lizefan.x@...edance.com, hannes@...xchg.org,
        cgroups@...r.kernel.org, linux-kernel@...r.kernel.org,
        longman@...hat.com, lcapitulino@...il.com,
        Michal Koutný <mkoutny@...e.com>
Subject: Re: [PATH v2] cgroup: add cgroup_favordynmods= command-line option

On Mon, Sep 18, 2023 at 10:01:13AM -0400, Luiz Capitulino wrote:
> 
> 
> On 2023-09-05 20:57, Luiz Capitulino 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.
> > 
> > This commit addresses this by introducing the cgroup_favordynmods=
> > command-line option. This option works for both cgroup v1 and v2 and
> > also allows for disabling favorynmods when the kernel built with
> > CONFIG_FAVOR_DYNMODS=y.
> > 
> > Signed-off-by: Luiz Capitulino <luizcap@...zon.com>
> 
> Ping?

Michal raised some valid concerns. I don't really mind that it's not great
on the edges tho. Michal, what do you think?

Thanks.

-- 
tejun