linux-kernel - Re: [PATCH] cgroup/cpuset: Fix a race between cpuset

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Message-ID: <20220121155705.GA2394@blackbody.suse.cz>
Date:   Fri, 21 Jan 2022 16:57:05 +0100
From:   Michal Koutný <mkoutny@...e.com>
To:     Zhang Qiao <zhangqiao22@...wei.com>
Cc:     linux-kernel@...r.kernel.org, cgroups@...r.kernel.org,
        tj@...nel.org, lizefan.x@...edance.com, hannes@...xchg.org,
        matthltc@...ibm.com, bblum@...gle.com, menage@...gle.com,
        akpm@...ux-foundation.org, longman@...hat.com,
        zhaogongyi@...wei.com
Subject: Re: [PATCH] cgroup/cpuset: Fix a race between cpuset_attach() and
 cpu hotplug

On Fri, Jan 21, 2022 at 06:12:10PM +0800, Zhang Qiao <zhangqiao22@...wei.com> wrote:
> Fixes: be367d099270 ("cgroups: let ss->can_attach and ss->attach do whole threadgroups at a time")

What a deep stratigraphy (not sure if it's this one but anything else
would likely come from eras ago too).

> Reported-by: Zhao Gongyi <zhaogongyi@...wei.com>
> Signed-off-by: Zhang Qiao <zhangqiao22@...wei.com>
> ---
>  kernel/cgroup/cpuset.c | 2 ++
>  1 file changed, 2 insertions(+)

Feel free to include
Reviewed-by: Michal Koutný <mkoutny@...e.com>