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



On 05/16/2012 08:35 AM, Daniel P. Berrange wrote:
> 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

I like the goal of this series, but we shouldn't apply it until this has
been accepted in upstream qemu and we have a commit id to point to.
That said, I'll still review the code.

-- 
Eric Blake   eblake redhat com    +1-919-301-3266
Libvirt virtualization library http://libvirt.org

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