Multiple guests running on the same host will currently have the same initiator name when running on KVM using iSCSI storage. This makes it impossible to use SCSI reservations without expensive Fibre Channel equipment that supports NPIV.
Putting the initiator in userspace will let users use persistent reservations with iSCSI storage. The code is already in Fedora 19, and is used in production by members of the upstream community. Libvirt support is on its way (patches posted, almost ready).
This request was resolved in Red Hat Enterprise Linux 7.0.
Contact your manager or support representative in case you have further questions about the request.