Comment 20 for bug 818673

Thank you, Rick.

Could you help me to narrow this problem down?

As I see, you have three virtio drivers installed on your system - block, net, and virtio serial.
Technically, anyone of them can create "trying to map MMIO memory" problem.
The best way to find a buggy driver ( or drivers) will be to isolate one from the other.
If you can, please try running only one virtio device every time to see which driver
sends incorrect scatter/gather list element to QEMU.

Another question. You said, the problem happens after every second or third restart.
Do you shutdown your VM, or just restart it? How does it work after going through
several hibernate/resume, and/or suspend/resume cycles.

Best regards,
Vadim.