linux-kernel - Re: [PATCH] cpufreq: Fix ondemand governor powersave

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Date:	Fri, 05 Nov 2010 07:49:05 -0400
From:	Arjan van de Ven <arjan@...ux.intel.com>
To:	Youquan Song <youquan.song@...ux.intel.com>
CC:	davej@...hat.com, venki@...gle.com, youquan.song@...el.com,
	cpufreq-list@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH] cpufreq: Fix ondemand governor powersave_bias execution
 time misuse

On 11/5/2010 11:19 AM, Youquan Song wrote:
> Ondemand governor use powersave_bias tunable to do aggressive power save by
> decrease CPU average frequency. The average frequency achieve by adjust low and
> high frequency's execution time proportion during one sample time interval.
>
> Current kernel, only the high frequency executes in time proportion, but the low
> frequency wrongly execute in one whole sample time interval when powersave_bias
> is set.
>
> The patch fix it by set low frequency execution time to it deserved.
>
> Signed-off-by: Youquan Song<youquan.song@...el.com>
> ---


while your patch looks correct, I think the whole feature is wonky and 
likely ought to be removed...........

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