Re: kernel trap

[Michael Lorenz <macallan%netbsd.org@localhost>]

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Hello,

On May 23, 2008, at 02:10, Al - image hosting services wrote:

> trap: kernel read DSI trap @ 0xde3a5784 by 0x2e6e1c (DSISR 0x40000000,
> err=
>
> I can't get to the debugger either. I don't know if that will be  
> enough
> information to figure out what went wrong.

That's not really useful until we find out where the trap really came  
from - the panic message states the address but that can vary  
depending on the kernel image used.

To find out where it happened do this:
- - load the kernel you ran when the panic happened into gdb ( gdb / 
netbsd.whatever )
- - disassemble what's at the trap address ( disassemble 0x2e6e1c )
gdb's assembly output should then tell you which function the code at  
0x2e6e1c belongs to.

> Anyway, the system is a Blue & White 450 Mhz G3 with an ATTO UL3D  
> with 3 drives.

Hmm, maybe torture it a bit more and see if it panics again, if it  
does see if it happens at the same address. The machine is pretty  
much loaded and I'm not sure what kind of power supply the b&w G3's  
use - might be a little bit too weak for all that stuff.
So, if it traps again, always at the same address it's either a bug  
or flaky memory. If it traps again but the trap addresses appear to  
be random it might be the power supply. If it's the power supply that  
shouldn't be such a big deal - it's standard ATX but the one Apple  
used is likely only 200W.

have fun
Michael

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