On 2012年07月18日 15:00, Parakkal, Navin S wrote: These fields are supported by libvirt, but unfortunately qemu has disabled them for monitor command query-ballon for a critical bug, it has been for a long time. I'm not clear about how the current status is, though I guess it's still not enabled. The version of libvirt 0.9.11 on

On 2012年07月18日 17:34, Navin P wrote: All the others are disabled except "actual". See qemu commit 07b0403dfc2b2 for more details. We might have bug if can't even get 'actual', because your libvirt version is new enough to include the libvirt commit: commit 41514f7b3e4eaa18a98976c05fab771fec4ded18 Author: Osier Yang <jyang(a)redhat.com&gt; Date: Tue Jun 14 11:21:35 2011 +0800 qemu: Parse current balloon value returned by query_balloon Qemu once supported following memory stats which will returned by "query_balloon": stat_put(dict, "actual", actual); stat_put(dict, "mem_swapped_in", dev->stats[VIRTIO_BALLOON_S_SWAP_IN]); stat_put(dict, "mem_swapped_out", dev->stats[VIRTIO_BALLOON_S_SWAP_OUT]); stat_put(dict, "major_page_faults", dev->stats[VIRTIO_BALLOON_S_MAJFLT]); stat_put(dict, "minor_page_faults", dev->stats[VIRTIO_BALLOON_S_MINFLT]); stat_put(dict, "free_mem", dev->stats[VIRTIO_BALLOON_S_MEMFREE]); stat_put(dict, "total_mem", dev->stats[VIRTIO_BALLOON_S_MEMTOT]); But it later disabled all the stats except "actual" by commit 07b0403dfc2b2ac179ae5b48105096cc2d03375a. libvirt doesn't parse "actual", so user will always see a empty result with "virsh dommemstat $domain". Even qemu haven't disabled the stats, we should support parsing "actual". Regards, Osier