linux-kernel - Re: [RFC][PATCH 05/18] sched: Provide p->on

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Date:	Wed, 05 Jan 2011 10:53:21 +0100
From:	Peter Zijlstra <a.p.zijlstra@...llo.nl>
To:	Yong Zhang <yong.zhang0@...il.com>
Cc:	Chris Mason <chris.mason@...cle.com>,
	Frank Rowand <frank.rowand@...sony.com>,
	Ingo Molnar <mingo@...e.hu>,
	Thomas Gleixner <tglx@...utronix.de>,
	Mike Galbraith <efault@....de>,
	Oleg Nesterov <oleg@...hat.com>, Paul Turner <pjt@...gle.com>,
	Jens Axboe <axboe@...nel.dk>, linux-kernel@...r.kernel.org,
	Steven Rostedt <rostedt@...dmis.org>
Subject: Re: [RFC][PATCH 05/18] sched: Provide p->on_rq

On Wed, 2011-01-05 at 16:13 +0800, Yong Zhang wrote:
> > +       if (p->on_rq && p->rt.nr_cpus_allowed > 1)
> 
> How about on_rt_rq(&p->rt) here?
> 
> Quoted from my previous reply:
> [Seems we need on_rt_rq(&p->rt) here, otherwise we enqueue the
> task to pushable list when called from rt_mutex_setprio()/
> __sched_setscheduler() etc. Thus add a little overhead.
> Though we call dequeue_pushable_task() in set_curr_task_rt()
> unconditionally.] 

Ah, sorry for loosing that reply..

Yes I think that would work, Steven?
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