linux-kernel - Re: PELT initial task load and wake_up_new

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Message-ID: <56722303.4070208@linaro.org>
Date:	Wed, 16 Dec 2015 18:50:43 -0800
From:	Steve Muckle <steve.muckle@...aro.org>
To:	Yuyang Du <yuyang.du@...el.com>
Cc:	Peter Zijlstra <peterz@...radead.org>,
	Ingo Molnar <mingo@...hat.com>,
	Morten Rasmussen <morten.rasmussen@....com>,
	Dietmar Eggemann <dietmar.eggemann@....com>,
	Patrick Bellasi <patrick.bellasi@....com>,
	Juri Lelli <Juri.Lelli@....com>,
	Vincent Guittot <vincent.guittot@...aro.org>,
	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>
Subject: Re: PELT initial task load and wake_up_new_task()

On 12/15/2015 03:55 PM, Yuyang Du wrote:
> Hope the following patch should work.

Thanks Yuyang. AFAICS it should work, though I believe the test on
last_update_time could instead go at the top of migrate_task_rq_fair()?
It'd save the fn call to remove_entity_load_avg() and two unnecessary
assignments (as p->se.avg.last_update_time and p->se.exec_start = 0 for
newly forked tasks). This worked for me.

thanks,
Steve
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