Messages in this thread | | | Date | Wed, 19 Dec 2007 19:09:48 +0200 | From | Avi Kivity <> | Subject | Re: [kvm-devel] Guest kernel hangs in smp kvm for older kernelsprior to tsc sync cleanup |
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Dor Laor wrote: >> > > >> > > vmx (and svm) allow us to add an offset to the physical tsc. We >> set it >> > > on startup to -tsc (so that an rdtsc on boot would return 0), and >> > > massage it on vcpu migration so that guest rdtsc is monotonic. >> > > >> > > The net effect is that tsc on a vcpu can experience large forward >> jumps >> > > and changes in rate, but no negative jumps. >> > >> > Changes in rate does not sound good. It's possibly what's screwing up >> > my paravirt clock implementation in smp. >> >> Do you mean in the case of VM migration, or just starting them on a >> single >> host? >> > It's the cpu preemption stuff on local host and not VM migration
No, migrating a vcpu to another cpu.
-- error compiling committee.c: too many arguments to function
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