On Sun, Dec 21, 2003 at 10:44:38PM -0500, Nathan J. Williams wrote:
> David Young <dyoung@pobox.com> writes:
> 
> > wi(4) contains no bus barriers, but lots of code could be sensitive to
> > out-of-order reads & writes. I am adding barriers where I think they are
> > called for. I will send a patch, soon. If somebody who understands the
> > fine points of bus barriers will review my patches, I would appreciate it.
> 
> All of the alpha bus-space operations currently include barriers; that
> is, they're conservative rather than permissive. Thus, I doubt that
> bus_space reordering is the problems.

Ouch. I guess I'm no nearer to fixing the bug, then.

Mel, does the panic always happen in the same place? Can you find out
the line number for me?

(BTW, is there a variable one can frob to build alpha or macppc with
permissive bus-space operations?)

Dave

-- 
David Young             OJC Technologies
dyoung@ojctech.com      Urbana, IL * (217) 278-3933