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 qemu upstream commit ID: 973603a813c5d60534b4fa0313f83be40e2b9c47 https://lists.gnu.org/archive/html/qemu-devel/2012-05/msg02255.html qemu upstream commit ID: 4860853d60ecea44b65e9cdefce980de3a641dce -- libvir-list mailing list libvir-list@redhat.com https://www.redhat.com/mailman/listinfo/libvir-list
