[vfio-users] UEFI Win7 VM randomly does not start

[Alex Williamson]

On Sat, 2015-10-17 at 10:50 +0200, Alexander Petrenz wrote:
> Hi all,
> 
> I have the problem that my UEFI VM for a Windows 7 guest does not always
> starts properly. When it doesn´t work I have to try it again and finally it
> will work after something between 3 to 6 attempts. The only error message
> is:
> qemu-system-x86_64: Guest moved used index from 13 to 0

This is a virtio issue that ring indexes are out of sync.  If you can
come up with a reproducible scenario on latest kernel and qemu, it
should be reported to the qemu-devel mailing list.  I've seen it
occasionally, but not consistently enough to debug.  Thanks,

Alex