Messages in this thread | | | Date | Wed, 15 Sep 2010 20:27:14 +0200 | From | Jan Kiszka <> | Subject | Re: [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
[unhandled content-type:application/pgp-signature] | |