Re: [PATCH] export notifier #1

Robin Holt
2008-01-23T19:58:39Z

On Wed, Jan 23, 2008 at 11:48:43AM -0800, Christoph Lameter wrote:
> On Wed, 23 Jan 2008, Andrea Arcangeli wrote:
>
> > On Wed, Jan 23, 2008 at 04:52:47AM -0600, Robin Holt wrote:
> > > But 100 callouts holding spinlocks will not work for our implementation
> > > and even if the callouts are made with spinlocks released, we would very
> > > strongly prefer a single callout which messages the range to the other
> > > side.
> >
> > But you take the physical address and turn into mm+va with your rmap...
>
> The remote mm+va or a local mm+va?

To be more complete, the phys is pointing to a xpmem_segment+va and the
xpmem_segment points to the mm. The seg describes a window into the
source processes virtual address space. Seems somewhat analogous to the
Xen grant, but I do not know.

Thanks,
Robin