linux-kernel - How to get backtrace? modprobe -r iwlagn; modprobe iwlagn kills kernel

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Date:	Wed, 18 May 2011 16:37:46 +0200
From:	Stevie Trujillo <stevie.trujillo@...il.com>
To:	linux-kernel@...r.kernel.org
Subject: How to get backtrace? modprobe -r iwlagn; modprobe iwlagn kills kernel

Hello,

I'm having some problem getting a backtrace. When I do "modprobe -r iwlagn; 
modprobe iwlagn" (2.6.38.6 with Intel-1030N) the kernel crashes (sometimes I 
need to try 2 or 3 times, and sometimes the modprobe -r is the one that 
crashes).
This spams my monitor with several oops/panics before it finally dies. I can 
only see bottom of the last one, which probably isn't very meaningful.
I tried loading netconsole, but I only get one or two lines before it stops 
sending/printing.
I then tried kexec+crashkernel, but I only managed to get a backtrace for the 
last panic (which I think is just a result of memory corruption or something).
Finally I tried compiling ramoops into my kernel, but it didn't want to load 
because of "No such device".

--
Stevie Trujillo
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