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    Subject[PATCH 0/2] powernow-k8: fix incorrect value reported in cpuinfo_cur_freq
    The "cpuinfo_cur_freq" value reported in /sys is incorrect.

    For example, on a 1P quad-core AMD platform (cores: 0,1,2,3) if you want the
    "cpuinfo_cur_freq" for core2, you will actually get the value for core0. The
    bug is apparent when all the cores are not at the same frequency.

    Prior to, "cpuinfo_cur_freq" used to return the correct value because
    query_current_values_with_pending_wait() obtained the P-state for core2 from
    HW, and overwrote the "currpstate" for core0 with it.

    However, that got broken with the commit:

    This patch fixes the regression by:
    - special-casing the AMD erratum 311 (discussed in the above commit) to AMD
    Family 11h processors only
    - cleaning up the way powernowk8_get() obtains the per-CPU data

    arch/x86/kernel/cpu/cpufreq/powernow-k8.c | 31 +++++++++++-----------------
    1 files changed, 12 insertions(+), 19 deletions(-)

    - naga -

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      Last update: 2009-06-11 17:29    [W:0.019 / U:47.080 seconds]
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