linux-kernel - Re: [PATCH 1/7] cpufreq: remove redundant CPUFREQ

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Message-ID: <CAJZ5v0jRDFJF6_mNvE7JknuUG-Tz1mDFMXw5rOEJP4GqXZtprA@mail.gmail.com>
Date:	Thu, 10 Sep 2015 02:53:18 +0200
From:	"Rafael J. Wysocki" <rafael@...nel.org>
To:	Viresh Kumar <viresh.kumar@...aro.org>
Cc:	"Rafael J. Wysocki" <rjw@...ysocki.net>,
	Lists linaro-kernel <linaro-kernel@...ts.linaro.org>,
	"linux-pm@...r.kernel.org" <linux-pm@...r.kernel.org>,
	Dmitry Eremin-Solenikov <dbaryshkov@...il.com>,
	Fabian Frederick <fabf@...net.be>,
	Jean-Christophe Plagniol-Villard <plagnioj@...osoft.com>,
	Jonathan Corbet <corbet@....net>, Len Brown <lenb@...nel.org>,
	"open list:ACPI" <linux-acpi@...r.kernel.org>,
	"open list:DOCUMENTATION" <linux-doc@...r.kernel.org>,
	"open list:FRAMEBUFFER LAYER" <linux-fbdev@...r.kernel.org>,
	open list <linux-kernel@...r.kernel.org>,
	Nicholas Mc Guire <hofrat@...dl.org>,
	Russell King <rmk+kernel@....linux.org.uk>,
	Tomi Valkeinen <tomi.valkeinen@...com>,
	Wolfram Sang <wsa@...-dreams.de>
Subject: Re: [PATCH 1/7] cpufreq: remove redundant CPUFREQ_INCOMPATIBLE
 notifier event

Hi,

On Thu, Sep 10, 2015 at 2:39 AM, Viresh Kumar <viresh.kumar@...aro.org> wrote:
> On 10-09-15, 01:26, Rafael J. Wysocki wrote:
>> On Monday, August 03, 2015 08:36:14 AM Viresh Kumar wrote:
>> > What's being done from CPUFREQ_INCOMPATIBLE, can also be done with
>> > CPUFREQ_ADJUST. There is nothing special with CPUFREQ_INCOMPATIBLE
>> > notifier.
>>
>> The above part of the changelog is a disaster to me. :-(
>>
>> It not only doesn't explain what really goes on, but it's actively confusing.
>>
>> What really happens is that the core sends CPUFREQ_INCOMPATIBLE notifications
>> unconditionally right after sending the CPUFREQ_ADJUST ones, so the former is
>> just redundant and it's more efficient to merge the two into one.
>
> Undoubtedly this looks far better :)
>
> But, isn't this series already applied some time back ?

Right, never mind.  For some reason that patch was left in the "New" state.

The code is OK.

Thanks,
Rafael
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