[libvirt] dommemstat won't work

Hi all. I try "virsh dommemstat <domain>" and it returns as follows :Failed to get memory statistics for domain vm_unfw :this function is not supported by the connection driver: virDomainMemoryStats So what may be the problem? I'm using CentOS release 5.5. Updated it's libvirt from 0.6.3 to 0.8.4 through "./configure; make; make install" procedure, and ran "autobuild.sh" in the directory of libvirt-0.8.4. Using "virsh version", it tells xen api version is 3.0.1, and xm version is 3.3.0 Thanks! 2010-10-27 黄亮