Re: 3.0-rc1: powerpc hangs at Kernel virtual memory layout

From: Christian Kujau
Date: Thu Jun 02 2011 - 02:17:06 EST

On Thu, 2 Jun 2011 at 08:07, RafaÅ MiÅecki wrote:
> 1) You didn't see (like Andres):
> Machine check in kernel mode.
> Caused by (from SRR1=149030): Transfer error ack signal
> Oops: Machine check, sig: 7 [#1]
> But, OK, maybe machine check requires something additional in kernel,
> I don't know...
> 2) You didn't see SSB messages
> This is confusing. You should see SSB messages that appear before my
> invalid read happens. Did you somehow disable most of the important
> logs, or sth? Having ssb messages and the end of hung boot would
> directly point you to ssb module.

BenH advised to boot with udbg-immortal and out came:
(watch it at very slow speed, as it's only 3sec long)

I've enabled[0] FB_NVIDIA and during normal booting the screen flickers
after the "... : fixmap" message and the screen clears and is filled again
from the top - maybe the messages would've been there if booted w/o the
framebuffer enabled.

Right now I'm happy that Ben's fix helped to get past this message, but
the system remains unsuable[1] with the latest -git, but more debugging
has to wait until tomorrow...


BOFH excuse #230:

Lusers learning curve appears to be fractal
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