linux-kernel - Re: [PATCH v2] cpufreq: allow powersave governor as the default without expert mode

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Message-ID: <1667797.SQK8nKtRUn@vostro.rjw.lan>
Date:	Sat, 08 Nov 2014 02:38:39 +0100
From:	"Rafael J. Wysocki" <rjw@...ysocki.net>
To:	Dirk Brandewie <dirk.brandewie@...il.com>
Cc:	James Geboski <jgeboski@...il.com>, dirk.j.brandewie@...el.com,
	Viresh Kumar <viresh.kumar@...aro.org>,
	linux-pm@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH v2] cpufreq: allow powersave governor as the default without expert mode

On Thursday, October 30, 2014 11:15:09 PM Dirk Brandewie wrote:
> On 10/30/2014 02:18 PM, Rafael J. Wysocki wrote:
> > On Thursday, October 16, 2014 07:37:11 AM James Geboski wrote:
> >> The intel_pstate driver only supports the performance and the powersave
> >> governors. With the performance governor ensuring the highest possible
> >> performance settings, userspace tools fail to make any lasting changes.
> >> In order to allow userspace tools to make modifications to the settings,
> >> the powersave governor must be in use. This makes having the powersave
> >> governor as the default convenient for systems where the intel_pstate
> >> driver is being employed. Having to enable expert mode in the kernel
> >> configuration is just a headache for such a trivial task.
> >>
> >> This patch applies to all kernel versions 2.6.38 or greater after the
> >> migration from CONFIG_EMBEDDED to CONFIG_EXPERT (6a108a14fa35). Most
> >> importantly, this applies to kernel versions 3.9 or greater when the
> >> intel_pstate driver was introduced.
> >>
> >> Signed-off-by: James Geboski <jgeboski@...il.com>
> >> Acked-by: Viresh Kumar <viresh.kumar@...aro.org>
> >
> > Dirk, any objections?
> 
> No objection.

OK, patch queued up for 3.19-rc1, thanks!


-- 
I speak only for myself.
Rafael J. Wysocki, Intel Open Source Technology Center.
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