linux-kernel - Re: [PATCH v4 5/5] sched: add two functions for att(det)aching a task to(from) a cfs

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Message-ID: <20150902082955.GA9387@gmail.com>
Date:	Wed, 2 Sep 2015 10:29:55 +0200
From:	Ingo Molnar <mingo@...nel.org>
To:	Peter Zijlstra <peterz@...radead.org>
Cc:	Byungchul Park <byungchul.park@....com>,
	linux-kernel@...r.kernel.org, yuyang.du@...el.com, efault@....de,
	tglx@...utronix.de
Subject: Re: [PATCH v4 5/5] sched: add two functions for att(det)aching a
 task to(from) a cfs_rq


* Peter Zijlstra <peterz@...radead.org> wrote:

> On Wed, Sep 02, 2015 at 11:33:15AM +0900, Byungchul Park wrote:
> > +++ b/kernel/sched/fair.c
> > @@ -7920,14 +7920,14 @@ prio_changed_fair(struct rq *rq, struct task_struct *p, int oldprio)
> >  
> >  static inline bool vruntime_normalized(struct task_struct *p)
> >  {
> >  	struct sched_entity *se = &p->se;
> >  
> >  	/*
> > +	 * In both TASK_ON_RQ_QUEUED case and TASK_ON_RQ_MIGRATING case,

s/         In both the TASK_ON_RQ_QUEUED and TASK_ON_RQ_MIGRATING cases,

> > +	 * the dequeue_entity(.flags=0) will already have normalized the
> > +	 * vruntime.

Thanks,

	Ingo
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