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From:   Shakeel Butt <shakeelb@google.com>
Date:   Wed, 3 Nov 2021 10:39:04 -0700
Message-ID: <CALvZod5yLyuagfmG4LpAkNihMhisioYXnruKL7GA3owOTSvy-g@mail.gmail.com>
Subject: Re: [PATCH] cgroup: rstat: Mark benign data race to silence KCSAN
To:     =?UTF-8?Q?Michal_Koutn=C3=BD?= <mkoutny@suse.com>
Cc:     cgroups@vger.kernel.org, Johannes Weiner <hannes@cmpxchg.org>,
        Li Zefan <lizefan@huawei.com>, Tejun Heo <tj@kernel.org>,
        Hao Sun <sunhao.th@gmail.com>, linux-kernel@vger.kernel.org
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On Wed, Nov 3, 2021 at 9:59 AM Michal Koutn=C3=BD <mkoutny@suse.com> 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@gmail.com>
> Link: https://lore.kernel.org/r/CACkBjsbPVdkub=3De-E-p1WBOLxS515ith-53SFd=
mFHWV_QMo40w@mail.gmail.com
> Suggested-by: Hao Sun <sunhao.th@gmail.com>
>
> Signed-off-by: Michal Koutn=C3=BD <mkoutny@suse.com>

Reviewed-by: Shakeel Butt <shakeelb@google.com>