Serge,
I wasn't clear, sorry. The kernel messages are appearing on the guest
and it becomes unresponsive.
Here is the libvirt.xml:
<domain type='kvm'>
<name>instance-00000092</name>
<memory>8388608</memory>
<os>
<type>hvm</type>
<kernel>/var/lib/nova/instances/instance-00000092/kernel</kernel>
<cmdline>root=/dev/vda console=ttyS0</cmdline>
<initrd>/var/lib/nova/instances/instance-00000092/ramdisk</initrd>
</os>
<features>
<acpi/>
</features>
<vcpu>4</vcpu>
<devices>
<disk type='file'>
<driver type='qcow2'/>
<source file='/var/lib/nova/instances/instance-00000092/disk'/>
<target dev='vda' bus='virtio'/>
</disk>
<disk type='file'>
<driver type='qcow2'/>
<source
file='/var/lib/nova/instances/instance-00000092/disk.local'/>
<target dev='vdb' bus='virtio'/>
</disk>
<interface type='bridge'>
<source bridge='br100'/>
<mac address='02:16:3e:72:4f:bb'/>
<filterref filter="nova-instance-instance-00000092-02163e724fbb">
<parameter name="IP" value="10.0.0.27" />
<parameter name="DHCPSERVER" value="10.0.0.44" />
</filterref>
</interface>
<!-- The order is significant here. File must be defined first -->
<serial type="file">
<source
path='/var/lib/nova/instances/instance-00000092/console.log'/>
<target port='1'/>
</serial>
<console type='pty' tty='/dev/pts/2'>
<source path='/dev/pts/2'/>
<target port='0'/>
</console>
<serial type='pty'>
<source path='/dev/pts/2'/>
<target port='0'/>
</serial>
<graphics type='vnc' port='-1' autoport='yes' keymap='en-us'
listen='0.0.0.0'/>
</devices>
</domain>
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https://bugs.launchpad.net/bugs/1011925
Title:
cpu soft lockup in Centos guest using KVM 0.14.1
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