Subject: Followup: MCHK exception in -current with MMU off
To: netbsd-macppc <>
From: Timo Schoeler <>
List: port-powerpc
Date: 04/03/2005 20:29:25
[please see for 


today i did a little testing on my G4 regarding this issue.

the point is that an _unoptimized_ kernel (i.e., building the kernel 
w/o any settings in /etc/mk.conf) crashes while booting the machine 
(please follow that URL above for details), while

i) a kernel built with mcpu=7400 and/or mtune=7400,

ii) a kernel built with -maltivec and/or -mabi=altivec, and

iii) a kernel built with -O3

as well as _any combination_ of the above mentioned optimizations lead 
to a _running_ (and rock solid) machine.

last tested with 3.99.3 from today.

if i can do anything to help fixing this, please mail me.


Timo Schoeler | |
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