linux-kernel - Re: [PATCH 06/16] sched: SCHED

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Message-ID: <1334160442.23924.257.camel@gandalf.stny.rr.com>
Date:	Wed, 11 Apr 2012 12:07:22 -0400
From:	Steven Rostedt <rostedt@...dmis.org>
To:	Juri Lelli <juri.lelli@...il.com>
Cc:	peterz@...radead.org, tglx@...utronix.de, mingo@...hat.com,
	oleg@...hat.com, fweisbec@...il.com, darren@...art.com,
	johan.eker@...csson.com, p.faure@...tech.ch,
	linux-kernel@...r.kernel.org, claudio@...dence.eu.com,
	michael@...rulasolutions.com, fchecconi@...il.com,
	tommaso.cucinotta@...up.it, nicola.manica@...i.unitn.it,
	luca.abeni@...tn.it, dhaval.giani@...il.com, hgu1972@...il.com,
	paulmck@...ux.vnet.ibm.com, raistlin@...ux.it,
	insop.song@...csson.com, liming.wang@...driver.com
Subject: Re: [PATCH 06/16] sched: SCHED_DEADLINE push and pull logic

On Fri, 2012-04-06 at 09:14 +0200, Juri Lelli wrote:

> +static void check_preempt_equal_dl(struct rq *rq, struct task_struct *p)
> +{
> +	/*
> +	 * Current can't be migrated, useles to reschedule,

 s/useles/useless/

I feel so useles by only adding typo fixes ;-)

-- Steve

> +	 * let's hope p can move out.
> +	 */
> +	if (rq->curr->dl.nr_cpus_allowed == 1 ||
> +	    latest_cpu_find(rq->rd->span, rq->curr, NULL) == -1)
> +		return;
> +
> +	/*
> +	 * p is migratable, so let's not schedule it and
> +	 * see if it is pushed or pulled somewhere else.
> +	 */
> +	if (p->dl.nr_cpus_allowed != 1 &&
> +	    latest_cpu_find(rq->rd->span, p, NULL) != -1)
> +		return;
> +
> +	resched_task(rq->curr);
> +}
> +
> +#endif /* CONFIG_SMP */
> +

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