[libvirt] Bug in virsh memtune on RHEL6?

Hi all, Getting strange numbers from the virsh memtune command on RHEL 6. (git head compiled, rather than RHEL 6 packages) virsh # list Id Name State ---------------------------------- 4 Fedora_14_x64 running virsh # memtune Fedora_14_x64 hard_limit : 9007199254740991 soft_limit : 9007199254740991 swap_hard_limit: 9007199254740991 Those numbers are supposed to be kilobytes, but the host box itself only has 12GB ram. Bug? Regards and best wishes, Justin Clift