linux-kernel - Re: [PATCH 2/2] sched: Use iowait boost policy option in schedutil

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Message-ID: <CAJWu+opaPcQA7qBkczqSybtux_6SaPCzyGNDv40JOJH8EtjBuA@mail.gmail.com>
Date:   Thu, 18 May 2017 21:56:10 -0700
From:   Joel Fernandes <joelaf@...gle.com>
To:     Viresh Kumar <viresh.kumar@...aro.org>
Cc:     Peter Zijlstra <peterz@...radead.org>,
        "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
        "Rafael J. Wysocki" <rafael@...nel.org>
Subject: Re: [PATCH 2/2] sched: Use iowait boost policy option in schedutil

On Thu, May 18, 2017 at 9:39 PM, Viresh Kumar <viresh.kumar@...aro.org> wrote:
> On Fri, May 19, 2017 at 12:00 AM, Joel Fernandes <joelaf@...gle.com> wrote:
>> If cpufreq policy has iowait boost enabled, use it. Also make it a schedutil
>> configuration from sysfs so it can be turned on/off if needed (by default use
>> the policy value).
>
> As I understand it, you want to make iowait boost optional. It may be worth
> mentioning why we want to do that in the commit somewhere. I am quite sure
> you don't want for some of the ARM platforms. Can you please elaborate?

Yes, I actually have power measurements too which I will include in v2.
This is for an arm64 based Qualcomm SoC.

thanks,

-Joel