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SubjectRe: [v7 PATCH 0/7]: cpuidle/x86/POWER: Cleanup idle power management code in x86, cleanup drivers/cpuidle/cpuidle.c and introduce cpuidle to POWER.
* Arun R Bharadwaj <arun@linux.vnet.ibm.com> [2009-10-06 20:54:21]:

> Hi
>
> Please consider this for inclusion into the testing tree.
>
> This patchset introduces cpuidle infrastructure to POWER, prototyping
> for pSeries, and also does a major refactoring of current x86 idle
> power management and a cleanup of cpuidle infrastructure.
>
> Earlier discussions on the same can be found at:
>
> v6 --> http://lkml.org/lkml/2009/9/22/180
> v5 --> http://lkml.org/lkml/2009/9/22/26
> v4 --> http://lkml.org/lkml/2009/9/1/133
> v3 --> http://lkml.org/lkml/2009/8/27/124
> v2 --> http://lkml.org/lkml/2009/8/26/233
> v1 --> http://lkml.org/lkml/2009/8/19/150
>
>
> Changes in this version:
> -----------------------------------------
>
> * Earlier implementation maintained a list of cpuidle devices and
> the list was traversed to disable and enable the cpuidle devices
> when switching governors. This list is not necessary and is removed.
> Now, we get the per cpu structure cpuidle_devices and disable and
> enable it for each online cpu while switching governors.
>
> * Earlier iterations were buggy w.r.t the sysfs interface of the cpuidle.
> This iteration removes the bug in PATCH 1/7.
>
> * In PATCH 7/7, smt_snooze_delay was not being updated whenever it was
> changed through the sysfs interface. Provide a helper routine to
> update it.
>
> * In PATCH 7/7, the idle loops are renamed to denote the idle states
> to avoid any confusion.
>

Also, the per-cpu nature of registration/unregistration of cpuidle
has been maintained as ACPI needs this.

>
> thanks,
> arun


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