Re: 3.9.0 + CONFIG_X86_INTEL_PSTATE=y -> ThinkPad T420 with i5 lost ACPI functionality

["Toralf Förster" <toralf.foerster@gmx.de>]

On 05/28/2013 08:11 PM, Toralf Förster wrote:
> cgexec from the libcgroup-tools package (fedora name) look like it will
>> place
>> a process in a group for you.
>> 
>> https://wiki.archlinux.org/index.php/Cgroups
>> 
>> Has some useful examples.
>> 
>> --Dirk
>> 

What I'm looking for is a command telling the governor "do not increase
CPU frequency for this process (group)" - because that's the main
intention of "nice -19", right ?

Without such a simple-to-use-command/replacement-of-nice-19 a lot of
systems in the wild won't work as expected with the p-state driver in
place of acpi_cpufreq.

(And AFAICR this was one of those reasons why for ondemand the
"ignore_nice" sysfs feature was implemented)

Especially RedHat systems using the  kernel-ml will automatically switch
to p-state - pretty sure, that's not wanted by a reasonable amount of
people, or ?

-- 
MfG/Sincerely
Toralf Förster
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