Here is my first pass at a patch for accessing the available memory associated with each NUMA cell through libvirt. The initial framework patch provided by Daniel Veillard is a prereq of this patch: https://www.redhat.com/archives/libvir-list/2007-September/msg00069.html I have not yet tested this. I'm just distributing for comments. A few comments/questions: 1) I think I got the versioning stuff right but that deserves a close look. 2) In Daniel's patch, libvirt.h and libvirt.h.in were identical. I assumed the patch would be before running autogen.sh, and only contain changes in libvirt.h.in, so that's how I did mine. Let me know if I misunderstand something here. 3) I had to put #ifdef PROXY around calls to virXenErrorFunc in xenHypervisorNodeGetCellsFreeMemory to get this to build. I haven't figured out how the proxy code works so am not sure if this is the right approach. -- Elizabeth Kon (Beth) IBM Linux Technology Center Open Hypervisor Team email: eak@us.ibm.com