[libvirt] HELP: after host upgrade to F11, guest runs extremely slow
greno at verizon.net
Mon May 25 20:01:50 UTC 2009
Daniel P. Berrange wrote:
> On Sat, May 23, 2009 at 03:43:12PM -0400, Gerry Reno wrote:
>> I upgraded the host from F10 to F11 (x86_64) with no issues. Now when I
>> start a F10 (i386) guest it runs very very slow. I also see messages on
>> the guest boot console about "clocksource tsc unstable" and some kernel
>> oops. Once it got far enough to start network I logged in and checked
>> the clocksource and it currently is 'acpi_pm' even though the kernel
>> line says clocksource=pit. The available clocksources are acpi_pm,
>> jiffies, and tsc. I do not see 'pit' in the list. How do I fix this issue?
> If the guest runs 'extrememly' slowly then the most like thing is that
> it has fallen back to using QEMU emulation, instead of KVM hardware
> acceleration. Check the /var/log/libvirt/qemu/$GUEST.log to see if there
> is any mesage about not being able to open /dev/kvm. Also make sure that
> KVM modules are loaded, and that 'virsh capabilities' lists KVM as a valid
Ok, I checked the guest log and it says:
/dev/kvm: no such file or directory.
So how do I make this node? Shouldn't libvirt have made it for us?
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