PPC64 boot failure with 2.6.15

[Patrick Finnegan]

On Wednesday 25 January 2006 19:54, Benjamin Herrenschmidt wrote:
> On Wed, 2006-01-25 at 18:21 -0500, Patrick Finnegan wrote:
> > After succeeding to get 2.4.26 working on my machine (an IBM 9076-N81
> > high node), I'm trying to get 2.6 to work on it.  So far, the kernel
> > fails to boot, and the machine resets partway through bootup.  I've
> > tried compiling both an SMP and UP 2.6.15.1 kernel (unmodified
> > kernel.org sources).
> >
> > I'm compiling the kernels with gcc-4.0, on a dual-G5 running a ppc64
> > kernel, v2.6.11.7:
> > gcc-4.0 (GCC) 4.0.3 20060115 (prerelease) (Debian 4.0.2-7)
> > Linux excalibur 2.6.11.7 #1 SMP Mon Apr 18 21:31:43 EST 2005 ppc64
> > GNU/Linux
>
> I don't see why it would reset at that point.... (after the symbios
> driver message). Does it sit there for a while before the reset or not ?

Yes, it sits there for a few minutes (I didn't time it).  I've seem somewhere 
that there's a problem with the SYM53C8xx driver in uniproc mode, and with 
2.4, it didn't work unless I was running an SMP kernel with the number of 
procs setting set to at least 16.

> Do you see any other message ? (The reset itself is spewing something on
> the serial port at all ?)

All the messages I see are listed; that's the output of the serial console.  
The "E075" is what the service processor spits out when the machine resets.

> One possible thing I spot in your log is:
>
> wdrtas: couldn't get token for ibm,get-system-parameter. Trying to continue
> with a default timeout value of 300 seconds.
>
> What happens if you disable CONFIG_WATCHDOG_RTAS ?

It sits at the same location (right after the message "scsi0 : sym-2.2.1") for 
about 7 minutes, and then resets - basically the same thing as before.

Pat
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