Linux Virtualization - Apr 2023 - [PATCH resend 1/2] vdpa/snet: support getting and setting VQ state

On Tue, Apr 4, 2023 at 3:35?PM Alvaro Karsz <alvaro.karsz at
solid-run.com> wrote:
>
> > > So it will arrive to the pci subsystem in program order, but the
pci subsystem may reorder, right?
> >
> > This is not what I read from the above doc. It said "to a
particular
> > device will arrive in program order".
>
> In this case, I can just remove the wmb and that's it, right?
But who or how to prevent the preemption?

Thanks
>
> Thanks
>
>

> > In this case, I can just remove the wmb and that's it, right?
> 
> But who or how to prevent the preemption?
We use a mutex to protect the control mechanism (snet->ctrl_lock).