On 08/07/2011 05:06 PM, Thomas Fjellstrom wrote:
Occasionally when there's heavy cpu and/or io load, a kvm guest will lock up for minutes at a time, last occurrence was for about 12 minutes or so, and the guest itself reported: [1992982.639514] Clocksource tsc unstable (delta = -747307707123 ns) in dmesg after it came back. The only other hint as to what is going on is that the irq count for "local timer requests", virtio-input and virtio- requests spikes rather high. Also one of the cpu cores on the host was pegged the entire time. The last thing to cause a hang was an "aptitude upgrade" in the guest, which was a bit behind, so it had to update over 300 packages. The host is running 2.6.38-1-amd64 (2.6.38+32) from debian, qemu-kvm 0.14.0, and the guest was running 2.6.38-2-amd64 (not sure on the + number). Is this a known problem, thats hopefully fixed in newer kernels and qemu/kvm packages?
Your guest isn't using kvmclock for some reason. Is it compiled in the guest kernel? What are the contents of /sys/devices/system/clocksource/clocksource0/available_clocksource and /sys/devices/system/clocksource/clocksource0/current_clocksource (in the guest filesystem)?
-- error compiling committee.c: too many arguments to function -- To unsubscribe from this list: send the line "unsubscribe kvm" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
