Comment 17 for bug 832507

Serge,
  The reason for the qemu-kvm task is that we think qemu-kvm is really the ultimate right place to add a '-serial ringbuffer:640k,file=/path/to/file' flag.
  All the other attempts are more hacky, but if upstream kvm had this , libvirt could expose it, and openstack could use it.
  I do not know whether or not it would be accepted upstream.