On 19/08/07, Chris Tyler <chris@xxxxxxxxxxx> wrote: > > I have a KVM-based virtual machine that's been running fine for months, > but in the past week or two the realtime clock has suddenly gotten very > slow, loosing about 6 hours per day (even ntpd can't get it back on > track). I don't know of any configuration changes that have taken place > other than than normal updates of guest and host via yum. The guest is > FC6, the host is F7 on x86_64. > > Anyone else seen this? (I've got rdate fixing up the time every 60 > minutes until I figure this out!...) > > -- > Chris Tyler > http://dailypackage.fedorabook.com/ > Do you run the guest OS as root or non-root ? I have this problem too. However, I run the guest as a non-root user, where I get the following warning: $ qemu -hda kvm-disks/win2000.img -m 384 -no-acpi -win2k-hack -cdrom /dev/cdrom -boot c -usb Could not configure '/dev/rtc' to have a 1024 Hz timer. This is not a fatal error, but for better emulation accuracy either use a 2.6 host Linux kernel or type 'echo 1024 > /proc/sys/dev/rtc/max-user-freq' as root. If, however, I run qemu as root, .... or specified 1024 for /proc/sys/dev/rtc/max-user-freq as root and still run qemu as non-root, then the host OS crashes when running qemu ( Haven't tried with the latest host kernel though ). So I am left with running qemu as non-root.
