Problems using PaloAlto VM-Series with version 5.3

Dec 4, 2018
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We are having some problems with ver 5.3 when trying to boot PaloAlto VM-Series firewall (8.1.0), it refuses to start with the new version. (kernel panic)
Downgrading pve-qemu-kvm to the previous version 2.11.2-1 made it work again.
I tested the same image on a ubuntu 18.04 with qemu-kvm 2.12 and it works fine.

* I've used PA VM on Proxmox for a while now, this is the first time we have had issues.
 
We've been running it on Proxmox on multiple locations for a while now (we started with Proxmox 4.4)
What are the changes from 2.11 to 2.12 that could cause that ?

* I seems that disabling multi-queue on the NICs (I had it set to 6) also prevents the issue from happening.

Well, it seems that with 8.1.0 neither Debian as host nor qem-kvm 2.12 is supported. Or Ubuntu 18.04 for that matter.
https://www.paloaltonetworks.com/do...-series-on-kvm-requirements-and-prerequisites

Besides that, please be more specific and share with us the stacktrace of the kernel and any relevant journal/syslog message.