linux-kernel - Re: [PATCH] cgroup: rstat: Mark benign data race to silence KCSAN

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Message-ID: <YZLSfFVKVFqLj3sP@slm.duckdns.org>
Date:   Mon, 15 Nov 2021 11:34:52 -1000
From:   Tejun Heo <tj@...nel.org>
To:     Michal Koutný <mkoutny@...e.com>
Cc:     cgroups@...r.kernel.org, Johannes Weiner <hannes@...xchg.org>,
        Li Zefan <lizefan@...wei.com>, Hao Sun <sunhao.th@...il.com>,
        linux-kernel@...r.kernel.org
Subject: Re: [PATCH] cgroup: rstat: Mark benign data race to silence KCSAN

On Wed, Nov 03, 2021 at 05:58:45PM +0100, Michal Koutný wrote:
> There is a race between updaters and flushers (flush can possibly miss
> the latest update(s)). This is expected as explained in
> cgroup_rstat_updated() comment, add also machine readable annotation so
> that KCSAN results aren't noisy.
> 
> Reported-by: Hao Sun <sunhao.th@...il.com>
> Link: https://lore.kernel.org/r/CACkBjsbPVdkub=e-E-p1WBOLxS515ith-53SFdmFHWV_QMo40w@mail.gmail.com
> Suggested-by: Hao Sun <sunhao.th@...il.com>
> 
> Signed-off-by: Michal Koutný <mkoutny@...e.com>

Applied to cgroup/for-5.17.

Thanks.

-- 
tejun