linux-kernel - Re: Hard lockups due to "tick/common: Make tick

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Date:   Sun, 8 Mar 2020 17:18:21 -0400
From:   Waiman Long <longman@...hat.com>
To:     Qian Cai <cai@....pw>, Thomas Gleixner <tglx@...utronix.de>
Cc:     "Joel Fernandes (Google)" <joel@...lfernandes.org>,
        "Paul E. McKenney" <paulmck@...nel.org>, rcu@...r.kernel.org,
        LKML <linux-kernel@...r.kernel.org>,
        Peter Zijlstra <peterz@...radead.org>,
        Will Deacon <will@...nel.org>, Ingo Molnar <mingo@...nel.org>,
        Frederic Weisbecker <fweisbec@...il.com>
Subject: Re: Hard lockups due to "tick/common: Make tick_periodic() check for
 missing ticks"

On 3/6/20 10:33 PM, Qian Cai wrote:
>
>> On Mar 5, 2020, at 11:06 PM, Qian Cai <cai@....pw> wrote:
>>
> Using this config,
>
>> https://raw.githubusercontent.com/cailca/linux-mm/master/x86.config
> Reverted the linux-next commit d441dceb5dce (“tick/common: Make tick_periodic() check for missing ticks”)
> fixed the lockup that could easily happen during boot.
>
I will take a look at that and get back to you ASAP.

Thanks,
Longman