[RFC] virtio: use mandatory barriers for remote processor vdevs

[Ohad Ben-Cohen]

On Thu, Dec 1, 2011 at 1:13 AM, Michael S. Tsirkin <mst at redhat.com> wrote:
> For x86, stores into memory are ordered. So I think that yes, smp_XXX
> can be selected at compile time.

But then you can't use the same kernel image for both scenarios.

It won't take long until people will use virtio on ARM for both
virtualization and for talking to devices, and having to rebuild the
kernel for different use cases is nasty.