Messages in this thread |  | | Date | Wed, 28 Aug 2002 22:27:43 +0200 | From | Dominik Brodowski <> | Subject | Re: [PATCH][2.5.32] CPU frequency and voltage scaling (0/4) |
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On Wed, Aug 28, 2002 at 12:49:31PM -0700, Linus Torvalds wrote: > > On 28 Aug 2002, Alan Cox wrote: > > > > You might want to read the paper on the original cpufreq for ARM. It > > gives real world cases where the user -needs- to be able to control the > > policy. I think you misunderstand what the interface is about. Large > > numbers of systems benefit from usermode policy engines. > > That's not the point. > > The point is that the _policy_ (not the end result) needs to be pushed > down to the kernel, so that the kernel can do the right thing with it. > > That policy can be updated in "real time" from user space, of course. But > the fact is that you cannot just set a frequency and leave it at that, it > doesn't work.
On the long term, maybe. But cpufreq is only the driver, which lets you have such a policy engine in the kernel. And as long as this policy engine doesn't exist, why not offer the user some control over his system?
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