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    SubjectRe: [PATCH] SATA / AHCI: Do not play with the link PM during suspend to RAM
    Date
    Hi Tejun,

    On Wednesday 18 August 2010, 08:12:24 Tejun Heo wrote:
    > On 08/17/2010 11:28 PM, Stephan Diestelhorst wrote:
    > > 2010/8/17 Tejun Heo <htejun@gmail.com>:
    > >> On 08/17/2010 12:51 PM, Stephan Diestelhorst wrote:
    > >>> I've also confirmed that the "XXX ahci_set_ipm" is present in
    > >>> libahci.ko. So either I've screwed up badly when compiling the initrd,
    > >>> the code is not executed or the printout does not make it into any
    > >>> logfile anymore.
    > >>
    > >> Yeah, that's weird. You're enabling IPM, right?
    >
    > You can check whether it's enabled by
    >
    > $ cat /sys/class/scsi_host/host0/link_power_management_policy
    >
    > If it says max_performance, it's disabled. If it says anything else,
    > it's enabled.

    It says "max_performance", I have not touched anyhting. So it has been
    like that all the time. Would this explain why your patch did not show
    the debug printout?

    Thanks,
    Stephan
    --
    Stephan Diestelhorst, AMD Operating System Research Center
    stephan.diestelhorst@amd.com, Tel. +49 (0)351 448 356 719

    Advanced Micro Devices GmbH Einsteinring 24 85609 Dornach
    General Managers: Alberto Bozzo, Andrew Bowd
    Registration: Dornach, Landkr. Muenchen; Registerger. Muenchen, HRB Nr. 43632



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