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    SubjectRE: [PATCH] x86: Export tsc related information in sysfs
    > Sorry, this is sort of mixing points
    > Again, this is mixing the discussion.

    Oops, sorry, missed that. :-}

    > Maybe something like a tsc_long_calibration=1 option would allow for
    > this?

    Sounds good to me. If it's non-obvious what value to choose for
    the new calibration, maybe specifying it in MS (per MAX_QUICK_PIT_MS
    in arch/x86/kernel/tsc.c) would be nice.

    > However, I really do like the idea of pulling the stamped value from
    > the MSR and if its close to what we quickly calibrated, use that.

    On a quick sample of two machines looking at the TSC calibration
    done by Xen (which exposes the equivalent of tsc_khz), it appears
    that the stamped value is different from the calibration by about
    1000ppm. YMMV.


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