boot problems on pseries

[Benjamin Herrenschmidt]

On Tue, 2006-08-08 at 18:36 -0700, Mark Fasheh wrote:
> Hello,
> 	So I do most of my work on some IBM JS20 powerpc blades. They
> usually run a git kernel on a stock RHEL4 distribution. The contents of
> /proc/cpuinfo is:
> 
> processor       : 0
> cpu             : PPC970, altivec supported
> clock           : 1600.000000MHz
> revision        : 2.2 (pvr 0039 0202)
> 
> processor       : 1
> cpu             : PPC970, altivec supported
> clock           : 1600.000000MHz
> revision        : 2.2 (pvr 0039 0202)
> 
> timebase        : 199837651
> platform        : pSeries
> machine         : CHRP IBM,8842-21X
> 
> 
> Recently, I discovered that newer kernels would no longer fully boot.
> There's no oops or panic message and they get through most of the kernel
> initialization before simply hanging. I spent some quality time today with
> git-bisect, and traced the badness down to this commit:

I'm just back from vacation and looking into this. 

Ben.