I'm having trouble keeping the system clocks sync'd on a number of kvm guests. I've googled a fair bit, and found a lot of different options, many of which I've tried, to no avail. So here I am.
ntpd is out of the question (the host system runs it and the clock is always correct, but if you run it on the guests, the clock goes way out of whack).
The host is Ubuntu 9.04, kernel is 2.6.28-11-server The guests are Ubuntu 8.04, kernel 2.6.24-24-virtual
Here's the clocksource situation on the host:
# cat /sys/devices/system/clocksource/clocksource0/available_clocksource tsc hpet acpi_pm jiffies # cat /sys/devices/system/clocksource/clocksource0/current_clocksource tsc
And on the guest:
# cat /sys/devices/system/clocksource/clocksource0/available_clocksource tsc pit jiffies # cat /sys/devices/system/clocksource/clocksource0/current_clocksource pit
I've got "clock=pit divider=10" in the kernel boot parameters on the guest. It still drifts. We're not talking massive drifts, but there is some.
Any suggestions? Has anyone had this problem and dealt with it?