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Date:   Mon, 4 Mar 2019 18:44:53 +0100
From:   Peter Zijlstra <peterz@infradead.org>
To:     Quentin Perret <quentin.perret@arm.com>
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        <Chunyan.Zhang@unisoc.com>, Ingo Molnar <mingo@redhat.com>,
        "linux-kernel@vger.kernel.org" <linux-kernel@vger.kernel.org>,
        Chunyan Zhang <zhang.lyra@gmail.com>,
        "Rafael J. Wysocki" <rjw@rjwysocki.net>
Subject: Re: =?utf-8?B?562U5aSNOiBbUEFUQ0ggVjRdIHNj?=
 =?utf-8?Q?hed=2Fcpufreq=3A_initializ?= =?utf-8?Q?e?= iowait_boost_max and
 iowait_boost with cpu capacity
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On Mon, Mar 04, 2019 at 06:40:28PM +0100, Peter Zijlstra wrote:

> 	/*
> 	 * @util is already in capacity scale, convert iowait_boost
> 	 * into the same scale so we can compare.
> 	 */
> 	boost = (sg_cpu->iowait_boost * max) >> SCHED_CAPACITY_SHIFT;
> 	util = max(boost, util);
> 	return min(util, max);

Ah, I don't think we need that last min in this case; both terms should
already be <= SCHED_CAPACITY_SCALE.