[vfio-users] GPU driver crashes when running a second VM if either VM has a virtual disk stored on physical media other than the root disk. Tested on three X58 chipset MBs

[Zycorax Tokoroa]

On 14/11/17 09:10, Brian Yglesias wrote:
> To put it another way, running concurrent VMs when at least one VM has an assigned GPU will always result in a GPU driver crash, unless all VMs and all their attached media reside on the root disk.  I've been able to replicate this consistently across three motherboards, all with the X58 chipset (I don't have anything else on hand to test with, and at this point I suspect it's a problem with the chipset).

I have been using different physical disks to back different virtual
machines that ran at the same time in order to distribute IO which would
otherwise bottleneck and I have never had such issues. In fact, I think
I've never used the same disk for VM storage and for the hypervisor, so
the issue you are facing must be somewhat specific to your setup,
physical or software-wise.

Zycorax Tokoroa