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Date:	Thu, 17 Sep 2015 10:31:41 +0800
From:	Yuyang Du <yuyang.du@...el.com>
To:	bsegall@...gle.com
Cc:	Morten Rasmussen <morten.rasmussen@....com>,
	Peter Zijlstra <peterz@...radead.org>,
	Dietmar Eggemann <dietmar.eggemann@....com>,
	Vincent Guittot <vincent.guittot@...aro.org>,
	Steve Muckle <steve.muckle@...aro.org>,
	"mingo@...hat.com" <mingo@...hat.com>,
	"daniel.lezcano@...aro.org" <daniel.lezcano@...aro.org>,
	"mturquette@...libre.com" <mturquette@...libre.com>,
	"rjw@...ysocki.net" <rjw@...ysocki.net>,
	Juri Lelli <Juri.Lelli@....com>,
	"sgurrappadi@...dia.com" <sgurrappadi@...dia.com>,
	"pang.xunlei@....com.cn" <pang.xunlei@....com.cn>,
	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH 5/6] sched/fair: Get rid of scaling utilization by
 capacity_orig

On Wed, Sep 16, 2015 at 10:06:24AM -0700, bsegall@...gle.com wrote:
> > The point really is, metrics (if not many ) need resolution, not just NICE_0_LOAD does. 
> > You can choose to either hardcode a number, like SCHED_CAPACITY_SHIFT now,
> > or you can use SCHED_RESOLUTION_SHIFT, which is even as simple as a sign to say what
> > the defined is (the scaled one with a better resolution vs. the original one).
> > I guess this is to say we now have a (no-big-deal) resolution system.
> 
> Yes they were chosen for similar reasons, but they are not conceptually
> related, and you couldn't decide to just bump up all the resolutions by
> changing SCHED_RESOLUTION_SHIFT, so doing this would just be misleading.

Yes, it appears they are made seemingly conceptually related. But probably 
it isn't worth a concern, if one knows it is just a scaled integer metric.
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