Messages in this thread | | | Date | Wed, 19 Dec 2007 17:41:17 +0200 | From | Avi Kivity <> | Subject | Re: [kvm-devel] Guest kernel hangs in smp kvm for older kernels prior to tsc sync cleanup |
| |
Glauber de Oliveira Costa wrote: > Changes in rate does not sound good. It's possibly what's screwing up > my paravirt clock implementation in smp. >
You should renew the timebase on vcpu migration, and hook cpufreq so that changes in frequency are reflected in the timebase.
> Since the host updates guest time prior to putting vcpu to run, two > vcpus that start running at different times will have different system > values. > > Now if the vcpu that started running later probes the time first, > we'll se the time going backwards. A constant tsc rate is the only way > around > my limited mind sees around the problem (besides, obviously, _not_ > making the system time per-vcpu). >
I tried disabling frequency scaling (rmmod acpi_cpufreq) but that didn't help my present problems.
-- error compiling committee.c: too many arguments to function
| |