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[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
qemu upstream commit ID: 973603a813c5d60534b4fa0313f83be40e2b9c47

https://lists.gnu.org/archive/html/qemu-devel/2012-05/msg02255.html
qemu upstream commit ID: 4860853d60ecea44b65e9cdefce980de3a641dce


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