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    SubjectRe: CONFIG_NO_HZ: missed ticks, stall (keyb IRQ required) [2.6.18-rc4-mm1]

    * Len Brown <len.brown@intel.com> wrote:

    > So given that C3 on every known system that has shipped to date breaks
    > the LAPIC timer (and apparently this applies to C2 on these AMD
    > boxes), dynticks needs a solid story for co-existing with C3.

    check out 2.6.19-rc4-mm2: it detects this breakage and works it around
    by using the PIT as a clock-events source. That did the trick on my
    laptop which has this problem too. I agree with you that degrading the
    powersaving mode is not an option.

    we've got a question about HPET: it seems all recent hardware has it,
    but the BIOS rarely mentions it, so the Linux driver does not enable
    HPET. Is there any chance to enable HPET (in the chipset?) - this would
    probably be a higher-quality clock-events source than the PIT.

    Ingo
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