On Tue, Nov 06, 2007 at 06:39:38PM -0500, Greg Troxel wrote:
> "Steven M. Bellovin" <smb@cs.columbia.edu> writes:
> 
> > Some time back, a change was made (by Greg Troxel, I thought) so that
> > rbus was calculated automatically.  It doesn't seem to happen on
> > amd64.  I have 3GB machine; here's what happened:
> 
> That's what I'd expect - I put the heuristic in the i386 machdep code.
> If you want to add it for amd64, or a different one that matches those
> platforms, that sounds sensible.  We could also have a common ruotine
> somewhere, since i386 and amd64 seem to share a lot.
> 
> But, with amd64 having more address space, the whole notion of using 1G
> or 2G as the rbus place seems odd.

It may have more address space, but there is still a physical address
boundary at 4GB.

	David

-- 
David Laight: david@l8s.co.uk