linux-kernel - Re: [PATCH 2/2] sched/hotplug: Ensure only per-cpu kthreads run during hotplug

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Date:   Wed, 16 Sep 2020 16:07:30 +0200
From:   peterz@...radead.org
To:     Sebastian Andrzej Siewior <sebastian@...akpoint.cc>
Cc:     mingo@...nel.org, vincent.guittot@...aro.org, tglx@...utronix.de,
        linux-kernel@...r.kernel.org, dietmar.eggemann@....com,
        rostedt@...dmis.org, bristot@...hat.com, swood@...hat.com,
        valentin.schneider@....com
Subject: Re: [PATCH 2/2] sched/hotplug: Ensure only per-cpu kthreads run
 during hotplug

On Wed, Sep 16, 2020 at 03:58:17PM +0200, Sebastian Andrzej Siewior wrote:
> On 2020-09-16 14:10:20 [+0200], peterz@...radead.org wrote:
> 
> squeeze that in please:
> 
> diff --git a/kernel/sched/core.c b/kernel/sched/core.c
> index a4fe22b8b8418..bed3cd28af578 100644
> --- a/kernel/sched/core.c
> +++ b/kernel/sched/core.c
> @@ -6866,7 +6866,7 @@ static int __balance_push_cpu_stop(void *arg)
>  	raw_spin_lock_irq(&p->pi_lock);
>  	rq_lock(rq, &rf);
>  
> -	update_rq_clock();
> +	update_rq_clock(rq);
>  
>  	if (task_rq(p) == rq && task_on_rq_queued(p)) {
>  		cpu = select_fallback_rq(rq->cpu, p);
> 
> 
> and count me in :)

Duh... /me goes in search of the brown paper bag -- again!