Re: [PATCH] vhost-user-scsi: implement handle_output

[Yongji Xie]

On Fri, 18 Oct 2019 at 19:14, Felipe Franciosi <address@hidden> wrote:
>
>
>
> > On Oct 18, 2019, at 3:59 AM, Yongji Xie <address@hidden> wrote:
> >
> > On Fri, 18 Oct 2019 at 01:17, Felipe Franciosi <address@hidden> wrote:
> >>
> >> Originally, vhost-user-scsi did not implement a handle_output callback
> >> as that didn't seem necessary. Turns out it is.
> >>
> >> Depending on which other devices are presented to a VM, SeaBIOS may
> >> decide to map vhost-user-scsi devices on the 64-bit range of the address
> >> space. As a result, SeaBIOS will kick VQs via the config space. Those
> >> land on Qemu (not the vhost backend) and are missed, causing the VM not
> >> to boot. This fixes the issue by getting Qemu to post the notification.
> >>
> > Should we fix this in vhost-user-blk too?
>
> I'm not sure vhost-user-blk suffers from the same problem. Certainly

Actually I found vhost-user-blk has the same problem in a mutilple
GPUs passthough environment.

Thanks,
Yongji