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From:   Dexuan-Linux Cui <dexuan.linux@gmail.com>
Date:   Sun, 15 Dec 2019 11:29:36 -0800
Message-ID: <CAA42JLY12Hk6UXREmyRss=DiCZ4MgK8ShB6s6Fv_KwDiuVDniA@mail.gmail.com>
Subject: Re: "rcu: React to callback overload by aggressively seeking
 quiescent states" hangs on boot
To:     paulmck@kernel.org
Cc:     Qian Cai <cai@lca.pw>,
        "Joel Fernandes (Google)" <joel@joelfernandes.org>,
        Tejun Heo <tj@kernel.org>,
        Josh Triplett <josh@joshtriplett.org>,
        Steven Rostedt <rostedt@goodmis.org>, rcu@vger.kernel.org,
        Linux Kernel Mailing List <linux-kernel@vger.kernel.org>,
        Lili Deng <Lili.Deng@microsoft.com>,
        Dexuan Cui <decui@microsoft.com>,
        Baihua Lu <Baihua.Lu@microsoft.com>
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On Sun, Dec 15, 2019 at 11:18 AM Dexuan-Linux Cui
<dexuan.linux@gmail.com> wrote:
>
> Hi,
> We're seeing the same hang issue with a recent Linux next-20191213
> kernel.  If we revert the same commit 82150cb53dcb ("rcu: React to
> callback overload by aggressively seeking quiescent states=E2=80=9D), the
> issue will go away.
>
> Note: we're running the x86-64 Linux VM Hyper-V, and the the torture
> test is not used:
Sorry for missing a "on" after the word "VM" (and typing 1 more "the") .