I've seen similar failure mode (no ping response from SMP VM, serial console dead, kvm process consumes 100% cpu).
I believe it is caused by bug(s) in kvm-clock clocksource. I've disabled it via kvm-noclock wrapper. Quoting http://permalink.gmane.org/gmane.comp.emulators.kvm.devel/51041 : "There are three issues with kvmclock due to sampling: 1) smp clock alignment may be slightly off due to timing conditions 2) kvmclock is resampled at each switch of vcpu to another pcpu 3) kvmclock granularity exceeds that of kernel timespec, which means sampling errors may show even on UP Recommend using a different clocksource (tsc is great if you have stable TSC and don't migrate across different-speed machines) until we have all the fixes in place." -- Sergey Svishchev -- To UNSUBSCRIBE, email to debian-bugs-dist-requ...@lists.debian.org with a subject of "unsubscribe". Trouble? Contact listmas...@lists.debian.org
