[please keep the list on CC for benefit of the community] On 10/16/22 09:58, Simon Fairweather wrote:

Thanks Michal, Are there any known issues with Memory Backing. We have QEMU 7.1 and libvirt 8.7.

If just Memory Backing is set the VM Freezes after a couple of hours and the allocated CPUs show 100% on the host.

Seems to happen more on AMD Platforms than Intel.

Please advise on any info you need, likely this is a QEMU issue.

<memoryBacking> <source type='memfd'/> <access mode='shared'/> </memoryBacking>

Agreed, this smells like QEMU issue. There's nothing obviously wrong with this snipped. I have a VM with just that and run it just fine. Although, I run it for couple of hours max. Michal