On Wednesday, December 4, 2002, at 12:34 AM, Martin J. Laubach wrote:

> |  	root file system type: ffs
> |
> |    then it sits there contemplating its navel or something,
> |  and does nothing.
>
>   OK, it's "options ALTIVEC". Without, it works, with, either
> nothing or one of my test kernels yielded
>
> 	root file system type: ffs
> 	trap type 700 at 0trap type 700 at 0
>
>   Seems something dramatic has changed here?
>
> 	mjl
>
>
I don't know if you are using either the perf. monitor exceptions or 
the TAU interrupt,  but some 7400's suffer from a bug if  two eceptions 
of DEC,TAU and perf mon happen at the same time. (Typically, it tries 
to take both and trashes SRR0/1).

Also, on linux, we are trying to track down a rare hangs that seem to 
happen only on rev 2.7 7400's and that could be related to a given MM 
usage pattern. What is your CPU rev ?

Ben.