[pmalynin]

I had a similar setup about a year back.

Running a Ubuntu Host with KVM, passing through an NVIDIA 970 to a Windows host. Yea...the GPU performance was fast, but everything else was so slow compared to running native. I think my biggest issue was with disk R/W, especially when memory pressure went up from the VM the system bogged down to a halt. After that, my biggest problems were with the fact that after the Windows host turned off, the GPU was stuck in the weird state where you can't reset it ( I know its a feature™ from Nvidia) and the Keyboard / Mouse would flake since I would attach the whole USB root to the VM as well.

In the end just decided to install back Windows and not have to deal with it.

[dijit]

QEMU recently got multi-threaded I/O. It used to be single threaded and that caused a lot of performance issues.

[AstralStorm]

By recently do you mean 2 to 3 years ago with a simple toggle?

Say hello to distributions not providing latest releases.