Comment 11 for bug 1541902

I'd say we should hold off:

http://lists.nongnu.org/archive/html/qemu-devel/2016-04/msg03092.html

Includes this bit:

>> Why 64-bit math here, but 128 bit math in the region_add path?

>

> Hm. Good question. It has been copied from the common VFIO code where it was
since 7532d3cbf1, back those days I did not even think of VFIO devices
hot(un)plugging
so
> region_del() was never executed so this seems to be a bug there and here.
Yet another patch is coming then

There are other things that aren't nearly as troublesome but it certainly
feels like another round of patches are forthcoming.
I didn't get a feeling from the patchset that this was functional, no
Tested-by: or Acked-by: either.

On Thu, May 12, 2016 at 1:11 PM, Serge Hallyn <email address hidden>
wrote:

> (Make that @raharper ^ )
>
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> Title:
> [FFE] Enable DDW on qemu aiming GPU passthrough performance on Ubuntu
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