linux-kernel - Re: [Bug] race condition at rebind

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Date:   Tue, 19 Jul 2022 15:35:12 +0200
From:   Michal Koutný <mkoutny@...e.com>
To:     Jing-Ting Wu <jing-ting.wu@...iatek.com>
Cc:     Tejun Heo <tj@...nel.org>, Johannes Weiner <hannes@...xchg.org>,
        Zefan Li <lizefan.x@...edance.com>,
        Matthias Brugger <matthias.bgg@...il.com>,
        cgroups@...r.kernel.org, linux-kernel@...r.kernel.org,
        linux-arm-kernel@...ts.infradead.org,
        linux-mediatek@...ts.infradead.org,
        Shakeel Butt <shakeelb@...gle.com>, wsd_upstream@...iatek.com,
        lixiong.liu@...iatek.com, wenju.xu@...iatek.com,
        jonathan.jmchen@...iatek.com
Subject: Re: [Bug] race condition at rebind_subsystems()

On Mon, Jul 18, 2022 at 03:44:21PM +0800, Jing-Ting Wu <jing-ting.wu@...iatek.com> wrote:
> Accroding your description, is the following patch corrent?

Yes, this is what I meant (i.e. grace period before invalidating the
removed rstat_css_node).

> If the patch is correct, we will add this patch to our stability test.
> And we will continue to observe whether the problem is solved.

It'd be great to have such confirmation.

Thanks,
Michal