linux-kernel - Re: [PATCH v3] sched: fix first task of a task group is attached twice

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Date:	Thu, 16 Jun 2016 07:24:53 +0800
From:	Yuyang Du <yuyang.du@...el.com>
To:	Vincent Guittot <vincent.guittot@...aro.org>
Cc:	Peter Zijlstra <peterz@...radead.org>,
	Ingo Molnar <mingo@...nel.org>,
	linux-kernel <linux-kernel@...r.kernel.org>,
	Dietmar Eggemann <dietmar.eggemann@....com>
Subject: Re: [PATCH v3] sched: fix first task of a task group is attached
 twice

On Thu, Jun 16, 2016 at 09:12:58AM +0200, Vincent Guittot wrote:
> > Then, when enqueued, both cfs_rq and task will be decayed to 0, due to
> > a large gap between 1 and now, no?
> 
> yes, like it is done currently (but 1ns later) .

Well, currently, cfs_rq will be decayed to 0, but will then add the task.
So it turns out the current result is right. Attached twice, but result
is right. Correct?