Comment 43 for bug 818177

Quoting James Hunt (<email address hidden>):
> @Serge: what was your storage configuration when you saw the problem
> without LVs? I think I've seen the problem a couple of times simply by
> providing 2 extra raw disks to the system but at that point my udevd
> debug wasn't helpful. I have tried modifying udevd to continue
> processing events but it then hangs. I really need to be able to
> recreate the problem more reliably on a system I've got control over
> before fathoming this one out.

Here is the xml for that domain, for what it's worth. disk0.img is
raw format:

serge@sergelap:~/vms/kvm/c$ qemu-img info disk0.img
image: disk0.img
file format: raw
virtual size: 8.0G (8589934592 bytes)
disk size: 3.3G

serge@sergelap:~/vms/kvm/c$ virsh dumpxml c
<domain type='kvm' id='2'>
  <name>c</name>
  <uuid>15405141-d078-c266-ae6f-8ca6b72a08e8</uuid>
  <memory>524288</memory>
  <currentMemory>524288</currentMemory>
  <vcpu>1</vcpu>
  <os>
    <type arch='x86_64' machine='pc-0.14'>hvm</type>
    <boot dev='hd'/>
  </os>
  <features>
    <acpi/>
    <apic/>
    <pae/>
  </features>
  <clock offset='utc'/>
  <on_poweroff>destroy</on_poweroff>
  <on_reboot>restart</on_reboot>
  <on_crash>restart</on_crash>
  <devices>
    <emulator>/usr/bin/kvm</emulator>
    <disk type='file' device='disk'>
      <driver name='qemu' type='raw'/>
      <source file='/home/serge/vms/kvm/c/disk0.img'/>
      <target dev='vda' bus='virtio'/>
      <alias name='virtio-disk0'/>
      <address type='pci' domain='0x0000' bus='0x00' slot='0x04' function='0x0'/>
    </disk>
    <disk type='block' device='cdrom'>
      <driver name='qemu' type='raw'/>
      <target dev='hdc' bus='ide'/>
      <readonly/>
      <alias name='ide0-1-0'/>
      <address type='drive' controller='0' bus='1' unit='0'/>
    </disk>
    <controller type='ide' index='0'>
      <alias name='ide0'/>
      <address type='pci' domain='0x0000' bus='0x00' slot='0x01' function='0x1'/>
    </controller>
    <interface type='network'>
      <mac address='00:16:3e:26:26:74'/>
      <source network='default'/>
      <target dev='vnet0'/>
      <model type='virtio'/>
      <alias name='net0'/>
      <address type='pci' domain='0x0000' bus='0x00' slot='0x03' function='0x0'/>
    </interface>
    <serial type='pty'>
      <source path='/dev/pts/4'/>
      <target port='0'/>
      <alias name='serial0'/>
    </serial>
    <console type='pty' tty='/dev/pts/4'>
      <source path='/dev/pts/4'/>
      <target type='serial' port='0'/>
      <alias name='serial0'/>
    </console>
    <input type='mouse' bus='ps2'/>
    <graphics type='vnc' port='5900' autoport='yes'/>
    <video>
      <model type='vmvga' vram='9216' heads='1'/>
      <alias name='video0'/>
      <address type='pci' domain='0x0000' bus='0x00' slot='0x02' function='0x0'/>
    </video>
    <memballoon model='virtio'>
      <alias name='balloon0'/>
      <address type='pci' domain='0x0000' bus='0x00' slot='0x05' function='0x0'/>
    </memballoon>
  </devices>
  <seclabel type='dynamic' model='apparmor'>
    <label>libvirt-15405141-d078-c266-ae6f-8ca6b72a08e8</label>
    <imagelabel>libvirt-15405141-d078-c266-ae6f-8ca6b72a08e8</imagelabel>
  </seclabel>
</domain>

The host is a core i7 laptop with 8G ram and showing 8 cpus.