linux-kernel - Re: [PATCH] cpufreq: Add scaling frequency range support

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Date:	Wed, 29 Jul 2015 02:15:02 +0200
From:	"Rafael J. Wysocki" <rjw@...ysocki.net>
To:	Pan Xinhui <xinhuix.pan@...el.com>
Cc:	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
	"linux-pm@...r.kernel.org" <linux-pm@...r.kernel.org>,
	Viresh Kumar <viresh.kumar@...aro.org>,
	"mnipxh@....com" <mnipxh@....com>,
	"yanmin_zhang@...ux.intel.com" <yanmin_zhang@...ux.intel.com>
Subject: Re: [PATCH] cpufreq: Add scaling frequency range support

On Tuesday, July 28, 2015 11:32:19 AM Pan Xinhui wrote:
> From: Pan Xinhui <xinhuix.pan@...el.com>
> 
> Userspace at most time do cpufreq tests very much inconveniently.
> Currently they have to echo min and max cpu freq separately like below:
> echo 480000  > /sys/devices/system/cpu/cpu0/cpufreq/scaling_min_freq
> echo 2240000 > /sys/devices/system/cpu/cpu0/cpufreq/scaling_max_freq

And why is this a problem?

> Add scaling_freq_range cpufreq attr to support userspace's demand.
> Therefore it's easier for testers to write readable scripts like below: 
> echo 480000-2240000 >
> /sys/devices/system/cpu/cpu0/cpufreq/scaling_freq_range

I'm not sure I agree with the statement that this is more readable.

Not applied.

Thanks,
Rafael

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