[libvirt-users] About live migration with snapshots

Hello, I'd like to live migration with snapshots. But it doesn't work. It comes out a message "cannot migrate domain with 1 snapshots" Then I try to trace the code(Libvirt 0.9.8 to 1.0.3), I find out the code in src/qemu/qemu_migration.c @ Line 1395 - 1440 (Libvirt 1.0.3) It will check the VM which has snapshots or not. I just curious about this limitation, why the VM can't live migration with snapshots? What happen if I skip this check? Does it has any suggestion way or virsh command with options to do live migration with snapshots? Thanks a lot. Hubert