linux-kernel - Re: [PATCH 03/16] sched: SCHED

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Message-ID: <1335174564.28150.107.camel@twins>
Date:	Mon, 23 Apr 2012 11:49:24 +0200
From:	Peter Zijlstra <peterz@...radead.org>
To:	Juri Lelli <juri.lelli@...il.com>
Cc:	tglx@...utronix.de, mingo@...hat.com, rostedt@...dmis.org,
	cfriesen@...tel.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 03/16] sched: SCHED_DEADLINE data structures.

On Mon, 2012-04-23 at 11:47 +0200, Juri Lelli wrote:
> On 04/23/2012 11:08 AM, Peter Zijlstra wrote:
> > On Fri, 2012-04-06 at 09:14 +0200, Juri Lelli wrote:
> >> +struct sched_dl_entity {
> >> +       struct rb_node  rb_node;
> >> +       int nr_cpus_allowed;
> >
> > I think it would be all-round best to move
> > sched_rt_entity::nr_cpus_allowed out next to cpus_allowed.
> 
> You mean unify them: a single nr_cpus_allowed after
> task_struct::cpus_allowed, right?

Yes, no point in keeping that one value twice and in fact there's a
usage of p->rt.nr_cpus_allowed in sched/fair.c so its past time its
moved out of that rt specific thing.
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