Messages in this thread | | | Date | Mon, 29 Oct 2007 23:55:28 +0100 | From | Ingo Molnar <> | Subject | Re: [PATCH] raise tsc clocksource rating |
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* Jeremy Fitzhardinge <jeremy@goop.org> wrote:
> > if it's inaccurate why are you exposing it to the guest then? Native > > only uses the TSC if it's safe and accurate to do so. > > It is used as part of the Xen clocksource as a short term > extrapolator, with correction parameters supplied by the hypervisor. > It should never be used directly.
that's totally broken then. You cannot create an SMP-safe monotonic clocksource via interpolation - native does not do it either. Good thing this problem got exposed, it needs to be fixed.
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