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    SubjectRe: [KVM timekeeping 10/35] Fix deep C-state TSC desynchronization
    Am 15.09.2010 14:32, Glauber Costa wrote:
    > On Wed, Sep 15, 2010 at 10:09:33AM +0200, Jan Kiszka wrote:
    >>> In any case, I'll proceed with the forcing of unstable TSC and HPET
    >>> clocksource and see what happens.
    >>
    >> I tried that before, but it did not trigger the issue that kvm-clock
    >> guests no longer boot properly. This only happens if the TSC is marked
    >> unstable.
    >
    > even artificially marked unstable ?
    >

    Yes. As soon as I hack tsc_unstable to 1, things go wrong. When I hack
    it back to 0, guest that wants kvm-clock boots again and seem to run fine.

    This is issue #2, I guess. Issue #2 remains that the TSC is marked
    unstable. I have the feeling that this is bogus, maybe due to lacking
    suspend/resume awareness? The tsc clocksource does

    clocksource_tsc.cycle_last = 0;

    on resume...

    Jan

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