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Re: [Xen-devel] RFC: cpu frequency scaling

Keir Fraser wrote:

Frequency changes in dom0, please. The 'small dom0' issue is easily handled
-- create a driver domain to handle the frequency management. Or move the
potentially resource-intensive processes in dom0 out to a domU

or have a cpufreq "driver domain"...

OK, I'll take a look at how we can do these things.

I'm guessing the way to start would be having either userspace
cpufreq code polling the hypervisor for CPU load, or have a
drivers/cpufreq/cpufreq_ondemand-xen.c that gets the CPU load
information from the hypervisor.

I'm guessing something like xentop already gets the right info
from the hypervisor in a relatively efficient way, or some of
the code in libvirt.

I'll dig around to see what code to hook into...

Who do you trust?
The people with all the right answers?
Or the people with the right questions?

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