Thanks for submitting this bug and helping to make Ubuntu better.
In order to give us some more info on your system, could you please run
'apport-collect 776936'?
I wonder whether disable KSM and memballoon might help. Could you
disable memballoon by doing
virsh edit deluge
and deleting the lines:
<memballoon model='virtio'>
<address type='pci' domain='0x0000' bus='0x00' slot='0x04'
function='0x0'/>
</memballoon>
Then disable KSM by editing /etc/default/qemu-kvm and changing
KSM_ENABLED=1
to
KSM_ENABLED=0
then restarting qemu-kvm:
restart qemu-kvm
Then see if the problem still reproduces.
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https://bugs.launchpad.net/bugs/776936
Title:
Running KVM guest causes kernel panic on host
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