Comment 22 for bug 1546674

It's not specific to zvols after all as I just setup a new hypervisor where I hand out host's partitions to the guests like this:

    <disk type='file' device='disk'>
      <driver name='qemu' type='raw' cache='none'/>
      <source file='/dev/sda4'/>
      <target dev='vda' bus='virtio'/>
    </disk>

This is enough to get virt-aa-helper to try reading /etc/nsswitch.conf, /etc/host.conf and /etc/gai.conf.