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Subject: Re: Hard lockups due to "tick/common: Make tick_periodic() check for
 missing ticks"
To:     Qian Cai <cai@lca.pw>, Thomas Gleixner <tglx@linutronix.de>
Cc:     "Joel Fernandes (Google)" <joel@joelfernandes.org>,
        "Paul E. McKenney" <paulmck@kernel.org>, rcu@vger.kernel.org,
        LKML <linux-kernel@vger.kernel.org>,
        Peter Zijlstra <peterz@infradead.org>,
        Will Deacon <will@kernel.org>, Ingo Molnar <mingo@kernel.org>,
        Frederic Weisbecker <fweisbec@gmail.com>
References: <CA9BD318-A8C8-4F22-828A-65C355931A5C@lca.pw>
 <F95F95DE-77D9-4A1D-AA5C-CAC165F6B4C8@lca.pw>
From:   Waiman Long <longman@redhat.com>
Organization: Red Hat
Message-ID: <68ef67a1-306f-ee87-14c8-14f8863a67a1@redhat.com>
Date:   Sun, 8 Mar 2020 17:18:21 -0400
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On 3/6/20 10:33 PM, Qian Cai wrote:
>
>> On Mar 5, 2020, at 11:06 PM, Qian Cai <cai@lca.pw> wrote:
>>
> Using this config,
>
>> https://raw.githubusercontent.com/cailca/linux-mm/master/x86.config
> Reverted the linux-next commit d441dceb5dce (=E2=80=9Ctick/common: Make=
 tick_periodic() check for missing ticks=E2=80=9D)
> fixed the lockup that could easily happen during boot.
>
I will take a look at that and get back to you ASAP.

Thanks,
Longman