[vfio-users] Win 10 VM often freezes Linux when shutting down

[Jens Zimmermann]

Alex, yeah, I know that x8 Gen3 is not really limiting the 750 Ti, but I
plan to buy a new graphics card in some years and I am worried this will be
the bottleneck for future GPUs.
I am rebooting my host daily, so that sound issue should not be a problem.
Regarding the host drivers binding to the GPU, I am using vfio-pci. As I
understood it once the GPU has been bound to vfio-pci at boot no host
drivers can bind it. Also this connection remains until host shutdown if I
don't unbind it manually (why would I do that?). Or am I wrong here?

So for my setup I have created /etc/modprobe.d/vfio.conf: options vfio-pci
ids=10de:1380,10de:0fbc
And put this into the mkinitcpio.conf: MODULES="vfio vfio_iommu_type1
vfio_pci vfio_virqfd"
I just read your blog post again and noticed I have not put options
vfio-pci disable_vga=1 in my modprobe.d yet, would that help?

Regards,
Jens

2016-02-18 23:03 GMT+01:00 Mario Goebbels <me at tomservo.cc>:

> You can assign it to the VM if you want, altho you don't need to, if you
> don't use HDMI audio. I never assigned it to the VM and VGA passthrough
> worked fine. I'm just saying, once you've bound vfio-pci to it, leave it
> assigned to the HDMI audio device. Unbinding vfio-pci from GPU audio
> frequently caused a kernel oops or locked up the system over here.
>
> And yes, a full shutdown (holding down SHIFT while clicking on Start ->
> Shutdown) bypasses the fast startup. I'm not sure how fast startup messes
> with the shutdown sequence, but QEMU doesn't like it one bit.
>
> Regards,
> -mg
>
>
> On Thu, Feb 18, 2016 at 9:06 PM, Jens Zimmermann <
> zimmermannjens888 at gmail.com> wrote:
>
>>
>> Mario, I am using vfio-pci to bind the GPU audio and then assign it to
>> the VM. So are you suggesting to not assign it to the VM in the first place
>> or what do you do? :-)
>> Concerning Windows fast startup, I know about the option you are talking
>> about and I had searched for it before already, but it does not exist on my
>> Windows for whatever reason (maybe because it is not activated yet). If I
>> understand it correctly the full shutdown should prevent the fast startup
>> though.
>>
>>
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://listman.redhat.com/archives/vfio-users/attachments/20160220/9fa2122a/attachment.htm>