I ran into the problem below running 2.6.33.2:
Problem: KVM guest running Linux 2.6.33.2 with kvm_clock as the clock
source and more than 1 virtual CPU has the clock jumping forward 1 hour,
13 minutes and 17 seconds (consistently)
Hardware: AMD Athlon Dual Core 4850e @ 2511.769 MHz
I can reproduce this consistently, and it does not happen on the same
machine if I launch the same KVM guest with -smp 1.
With RTC compiled into the kernel you can see that its just clock, the
localtime was set to UTC:
Running the following in a loop:
cat /sys/class/rtc/rtc0/time ; date
You see:
18:07:49
Mon Apr 12 18:07:49 UTC 2010
18:08:21
Mon Apr 12 19:21:49 UTC 2010
18:08:21
Mon Apr 12 18:08:22 UTC 2010
The load average on the system is 0, the guest is doing nothing but
running init. It happens regardless of whether I run one guest or over
10 guests on the same system.
I can easily reproduce this issue, so if you need someone to test
patches etc, I can easily do that.
Thanks
--
John Buswell
http://www.carbonmountain.com
--
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
