On Tue, Nov 28, 2006 at 08:22:28PM +0100, Thomas Feddersen wrote:
> Dear kern-bug-people,
> 
> the PR can be closed. It was a hardware problem:
> 
> I removed the AENEON (1Rx16 PC2-4200U-444-11) memory and 
> replaced it with KINGSTON (PC2-4200 CL4 240).
> -> The system no longer drops into debugger.
> 
> One question remains: is there a reliable memory tester? Memtest86+ wasn't
> in this case.

Well, Memtest86+ has found issue in most cases for me, but after running 
for several hours to several days. But it always was on system that did
work at one time, and stopped working; I never tried it to detect
incompatible memory like it seems to be in your case. In such situation it's
possible that concurrent RAM access (like CPU + bus-master DMA) is required
to trigger the problem, and in such cases a simple memory tester won't
be usefull.

-- 
Manuel Bouyer <bouyer@antioche.eu.org>
     NetBSD: 26 ans d'experience feront toujours la difference
--