Re: [PATCH] 3/3 Dynamic cpufreq governor and updates to ACPI P-state driver

[Mattia Dongili]

On Tue, Oct 21, 2003 at 10:38:53AM +0200, Arjan van de Ven wrote:
> On Tue, 2003-10-21 at 04:56, Pallipadi, Venkatesh wrote:
> > Patch 3/3: New dynamic cpufreq driver (called 
> > DemandBasedSwitch driver), which periodically monitors CPU 
> > usage and changes the CPU frequency based on the demand.
> 
> 
> it's all nice code and such, but I still wonder why this can't be done
> by a userland policy daemon. The 2.6 kernel has the infrastructure to
> give very detailed information to userspace (eg top etc) about idle
> percentages...... I didn't see anything in this driver that couldn't be
> done from userspace.

I remember Linus forcing a kernel only policy management:
http://www.linux.org.uk/mailman/private/cpufreq/2002-August/000865.html

Also: I think the userspace governor is a workaround to allow userspace
policies.

ciao
-- 
mattia
:wq!

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