Re: [PATCH][2.5.32] CPU frequency and voltage scaling (0/4)

Alan Cox (alan@lxorguk.ukuu.org.uk)
29 Aug 2002 00:30:06 +0100


On Wed, 2002-08-28 at 22:08, Linus Torvalds wrote:
>
> On Wed, 28 Aug 2002, Dominik Brodowski wrote:
> >
> > "policy input" --> "frequency input" --> cpufreq core --> cpufreq driver
> > user-space | k e r n e l - s p a c e
>
> No.
>
> The "policy input" has to filter down ALL THE WAY. If you turn it into a
> frequency-only input at _any_ time, you've lost information that the
> lowest levels need.

So what you are saying is that you want to be sure that something like
"please run at a low speed to save battery" is translated by smarter
cpus into "please save battery" and on spudstop the CPU would go "umm
duh ok 300MHz"

Ok now I think I understand your gripe.

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