linux-kernel - Re: "rcu: React to callback overload by aggressively seeking quiescent states" hangs on boot

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Message-ID: <20191215201823.GL2889@paulmck-ThinkPad-P72>
Date:   Sun, 15 Dec 2019 12:18:23 -0800
From:   "Paul E. McKenney" <paulmck@...nel.org>
To:     Qian Cai <cai@....pw>
Cc:     Dexuan-Linux Cui <dexuan.linux@...il.com>,
        "Joel Fernandes (Google)" <joel@...lfernandes.org>,
        Tejun Heo <tj@...nel.org>,
        Josh Triplett <josh@...htriplett.org>,
        Steven Rostedt <rostedt@...dmis.org>, rcu@...r.kernel.org,
        Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
        Lili Deng <Lili.Deng@...rosoft.com>,
        Dexuan Cui <decui@...rosoft.com>,
        Baihua Lu <Baihua.Lu@...rosoft.com>
Subject: Re: "rcu: React to callback overload by aggressively seeking
 quiescent states" hangs on boot

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@...il.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