linux-kernel - Re: [RFC][PATCH] sched: Start stopper early

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Message-ID: <20151007132403.GA24924@redhat.com>
Date:	Wed, 7 Oct 2015 15:24:03 +0200
From:	Oleg Nesterov <oleg@...hat.com>
To:	Peter Zijlstra <peterz@...radead.org>
Cc:	heiko.carstens@...ibm.com, linux-kernel@...r.kernel.org,
	Tejun Heo <tj@...nel.org>, Ingo Molnar <mingo@...nel.org>,
	Rik van Riel <riel@...hat.com>
Subject: Re: [RFC][PATCH] sched: Start stopper early

Damn sorry for noise ;)

On 10/07, Oleg Nesterov wrote:
>
> +void stop_machine_park(int cpu)
> +{
> +	struct cpu_stopper *stopper = &per_cpu(cpu_stopper, cpu);
> +
> +	spin_lock(&stopper->lock);
> +	stopper->enabled = false;
> +	spin_unlock(&stopper->lock);

Of course, it should also do kthread_park(current).

Oleg.

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