Proxmox 4.0 beta vm with iothread on virtio disk causes vm crash during vzdump

[micush]

On Proxmox 4.0 beta, a VM with iothread enabled on a virtio disk causes the VM to crash during a vzdump snapshot backup. I can reproduce it every single time on 5 different hosts backing up to either NFS or a local disk, whether it is a scheduled backup or an immediate backup.

 

[spirit]

yes currently backup don't support iothread yet, but indeed we should skip theses drives and not crash.
I'll make a patch next week when I'll come back from holiday.