[Pkg-libvirt-maintainers] Bug#537445: Bug#537445: restoring leaves kvm-instance in unusable state

[Guido Günther]

reassign 537445 kvm
thanks

Hi Martin,
On Sat, Jul 18, 2009 at 01:23:44PM +0200, martin f krafft wrote:
> I can use virsh to save the state of my machines just fine; at least
> there is no error reported. However, if I try to restore the
> machine, kvm starts fine and I can connect to the qemu pty, but when
> I connect to the ttyconsole, the login prompt is not there. A minute
> later, the VM reboots and then works fine.
> 
> During save, the host's kernel log shows
> 
>   kvm: 22871: cpu0 unhandled rdmsr: 0xc0010117
> 
> When I restore, I see
> 
>   kvm: 19696: cpu0 unhandled rdmsr: 0xc0010117
>   kvm: 22871: cpu0 unhandled wrmsr: 0xc0010117
>   kvm: 22871: cpu0 unhandled rdmsr: 0xc0010117
>   kvm: 22871: cpu0 unhandled rdmsr: 0xc0010117
> 
> followed by 240 of those messages:
> 
>   vcpu not ready for apic_round_robin
>   [4/second for precisely 60 seconds]
This pretty much looks like a kvm problem. Please look at
/var/log/libvirt/qemu/$vm.log for other errors. This should also show
what libvirt sends to kvm to restore the vm. Could you try to reproduce
without libvirt? You could also try to use qemu instead of kvm (they use
the same syntax for this now) to help to isolate the problem.
Cheers,
 -- Guido

P.S.: Unfortunately due to lack of manpower we're lagging a bit when it
comes to new kvm versions so retesting with a newer version isn't that
easy.