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Date:   Sun, 15 Dec 2019 12:18:23 -0800
From:   "Paul E. McKenney" <paulmck@kernel.org>
To:     Qian Cai <cai@lca.pw>
Cc:     Dexuan-Linux Cui <dexuan.linux@gmail.com>,
        "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>
Subject: Re: "rcu: React to callback overload by aggressively seeking
 quiescent states" hangs on boot
Message-ID: <20191215201823.GL2889@paulmck-ThinkPad-P72>
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References: <BCD69C9E-4E61-405F-A514-36096E0F34F4@lca.pw>
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On Sun, Dec 15, 2019 at 02:53:37PM -0500, Qian Cai wrote:
> > On Dec 15, 2019, at 2:18 PM, Dexuan-Linux Cui <dexuan.linux@gmail.com> wrote:
> > 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”), the
> > issue will go away.
> 
> Does this patch work for you?
> 
> https://lore.kernel.org/rcu/20191215065242.7155-1-cai@lca.pw

Same question for this one:

https://lore.kernel.org/lkml/20191215201646.GK2889@paulmck-ThinkPad-P72/

							Thanx, Paul