[libvirt] [PATCH 0/2] Avoid touching monitor when fetching guest XML or info

The virDomainGetXMLDesc and virDomainGetInfo APIs for QEMU suffer from needing to run 'query-balloon' to update the balloon level. This has caused us performance problems and even worse caused us to lock up on a dead QEMU. The following two patches to QEMU add a BALLOON_EVENT and a query-events command to QMP. With those two parts, we can avoiding running the query-balloon command at all. https://lists.gnu.org/archive/html/qemu-devel/2012-05/msg02215.html https://lists.gnu.org/archive/html/qemu-devel/2012-05/msg02255.html