lkml.org 
[lkml]   [2009]   [Sep]   [24]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
    /
    Date
    From
    SubjectRe: [v6 PATCH 0/7]: cpuidle/x86/POWER: Cleanup idle power management code in x86, cleanup drivers/cpuidle/cpuidle.c and introduce cpuidle to POWER.
    On Thu, 24 Sep 2009 10:42:41 +0530
    Arun R Bharadwaj <arun@linux.vnet.ibm.com> wrote:

    > * Arun R Bharadwaj <arun@linux.vnet.ibm.com> [2009-09-22 16:55:27]:
    >
    > Hi Len, (or other acpi folks),
    >
    > I had a question regarding ACPI-cpuidle interaction in the current
    > implementation.
    >
    > Currently, every cpu (i.e. acpi_processor) registers to cpuidle as
    > a cpuidle_device. So every cpu has to go through the process of
    > setting up the idle states and then registering as a cpuidle device.
    >
    > What exactly is the reason behind this?
    >

    technically a BIOS can opt to give you C states via ACPI on some cpus,
    but not on others.

    in practice when this happens it tends to be a bug.. but it's
    technically a valid configuration



    --
    Arjan van de Ven Intel Open Source Technology Centre
    For development, discussion and tips for power savings,
    visit http://www.lesswatts.org


    \
     
     \ /
      Last update: 2009-09-24 14:29    [W:3.221 / U:0.036 seconds]
    ©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site