Comment # 2 on bug 1074572 from M Koyama

Thank you for reply.
Sorry, I updated to Virtualization repository, so do not use 
problem version of Libvirt and qemu.

These are problem version.(openSUSE 42.3 release package)

- your host kernel/qemu/libvirt version
kernel:4.4.103-18.41-default
qemu: 2.9.1
libvirt: 3.3.0 

- the libvirt xml you use to start the guest

<domain type='kvm'>
  <name>vm_ns</name>
  <uuid>xxxxxxxxxxxxxxxx</uuid>
  <description>debian8 64bit</description>
  <memory unit='KiB'>1048576</memory>
  <currentMemory unit='KiB'>1048576</currentMemory>
  <vcpu placement='static'>1</vcpu>
  <os>
    <type arch='x86_64' machine='pc-i440fx-1.6'>hvm</type>
    <boot dev='hd'/>
  </os>
  <features>
    <acpi/>
    <apic/>
    <pae/>
  </features>
  <clock offset='localtime'/>
  <on_poweroff>destroy</on_poweroff>
  <on_reboot>restart</on_reboot>
  <on_crash>destroy</on_crash>
  <devices>
    <emulator>/usr/bin/qemu-kvm</emulator>
  <devices>
    <emulator>/usr/bin/qemu-kvm</emulator>
    <disk type='file' device='disk'>
      <driver name='qemu' type='raw'/>
      <source file='/var/lib/libvirt/images/guest.img'/>
      <target dev='vda' bus='virtio'/>
      <address type='pci' domain='0x0000' bus='0x00' slot='0x03'
function='0x0'/>
    </disk>
    <disk type='file' device='cdrom'>
      <driver name='qemu' type='raw'/>
      <source file='/var/lib/libvirt/images/debian-8.10.0-amd64-netinst.iso'/>
      <target dev='hda' bus='ide'/>
      <readonly/>
      <address type='drive' controller='0' bus='0' target='0' unit='0'/>
    </disk>
    <controller type='usb' index='0'>
      <address type='pci' domain='0x0000' bus='0x00' slot='0x01'
function='0x2'/>
    </controller>
    <controller type='pci' index='0' model='pci-root'/>
    <controller type='ide' index='0'>
      <address type='pci' domain='0x0000' bus='0x00' slot='0x01'
function='0x1'/>
    </controller>
    <serial type='pty'>
      <target port='0'/>
    </serial>
    <console type='pty'>
      <target type='serial' port='0'/>
    </console>
   <input type='mouse' bus='ps2'/>
    <input type='keyboard' bus='ps2'/>
    <graphics type='vnc' port='-1' autoport='yes'>
      <listen type='address'/>
    </graphics>
    <video>
      <model type='cirrus' vram='16384' heads='1' primary='yes'/>
      <address type='pci' domain='0x0000' bus='0x00' slot='0x02'
function='0x0'/>
    </video>
    <hostdev mode='subsystem' type='pci' managed='yes'>
      <driver name='vfio'/>
      <source>
        <address domain='0x0000' bus='0x00' slot='0x19' function='0x0'/>
      </source>
      <address type='pci' domain='0x0000' bus='0x00' slot='0x04'
function='0x0'/>
    </hostdev>
    <memballoon model='virtio'>
      <address type='pci' domain='0x0000' bus='0x00' slot='0x06'
function='0x0'/>
    </memballoon>
  </devices>
</domain>


- the specific distribution of your guest
Debian 8(64bit)


- the libvirtd log
Sorry log missing ...

For the last one, in /etc/libvirt/libvirtd.conf, set:
log_level = 1
log_outputs="1:file:/tmp/libvirtd.log"
Then restart libvirtd and attach /tmp/libvirtd.log.

Sorry I updated to libvirt version: 3.10.0, qemu version: 2.11.0.


New version of libvirt work well, no problem.