[libvirt] implementing locking with libvirt on ubuntu

Hi I am trying to implement locking i,e two vms are not started with same disk on ubuntu. Using libvirt 0.9.7 (Installed it from source) qemu-kvm 0.14.1 kernel 3.0.0-13-server Steps followed while installing from source cd libvirt-0.9.7 ./configure make make install I found that sanlock or virtlockd (fcntl) daemons can do that,but not able implement it. I dont find virtlockd daemon running. http://www.redhat.com/archives/libvir-list/2011-July/msg00337.html it is said to create lockd directory under /var/lib/libvirt I dont find this directory after installation from source Am i missing something ? Please guide me in implementing locking on ubuntu. -- Thanks and Regards, Upendra.M