linux-kernel - Re: [PATCH] timers/nohz: Update nohz load even if tick already stopped

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Message-ID: <alpine.DEB.2.21.1911042315390.17054@nanos.tec.linutronix.de>
Date:   Mon, 4 Nov 2019 23:17:02 +0100 (CET)
From:   Thomas Gleixner <tglx@...utronix.de>
To:     Scott Wood <swood@...hat.com>
cc:     Peter Zijlstra <peterz@...radead.org>,
        Frederic Weisbecker <frederic@...nel.org>,
        Ingo Molnar <mingo@...nel.org>,
        LKML <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH] timers/nohz: Update nohz load even if tick already
 stopped

On Fri, 1 Nov 2019, Scott Wood wrote:
> On Wed, 2019-10-30 at 14:31 +0100, Peter Zijlstra wrote:
> > Oh argh! that's a bit radical of the remote tick. The normal tick runs
> > just fine on idle CPUs, so lets mirror that.
> > 
> > How's this then?

....
 
> 
> Needs to be tick_nohz_tick_stopped_cpu(cpu)
> 
> After fixing that, I get:
> 
> [    7.439068] WARNING: CPU: 20 PID: 7 at /home/root/linux/kernel/sched/core.c:3681 sched_tick_remote+0x132/0x150

So I'm going to apply Scotts patch if nobody comes up with a better idea
until tomorrow.

Thanks,

	tglx