[CentOS] kernel panic/abort during boot

[fred smith]

On Wed, Dec 21, 2011 at 08:30:23PM -0700, Corey Henderson wrote:
> On 12/21/2011 8:23 PM, fred smith wrote:
<snip>
> 
> If you come up empty (all the same kernel modules exist in both) then 
> it's likely a bug in some kernel module. The "emergency_shell" part of 
> dracut may be useful in debug this. When you reboot, during the grub 
> menu, add this to the kernel's command line:
> 
> rdbreak=cmdline
> 
> During the boot process, you'll get dropped to a command line, and can 
> run some of the basic commands provided intisde the initramfs.
> 
> If you look at the "init" file inside the initramfs, you can see the 
> different points you'll end up with with different arguments to rdbreak; 
> ie, pre-udev, initqueue, etc.

Having gotten nowhere, so far, I tried the above. I haven't any clue
what would be helpful to do when it hits a "breakpoint", but I just
typed "exit" to drop back out of the shell, a couple of times. it
eventually got to where it said "starting udev" then a few seconds
later the dump appeard on the screen again. but there seemed to be
more of it shown so I took a photo of it. If you feel like taking a look
to see if you can figure it out, you can find it at:

http://users.rcn.com/fredricksmith/dump.jpg

I don't know what any of it means, except that it mentions modprobe,
and it appears that the stack trace has something to do with sound,
perhaps modprobe croaks when loading/munging drivers for sound.

If anyone of you can make more sense of it than I, I'd appreciate
the help.

thanks!

-- 
---- Fred Smith -- fredex at fcshome.stoneham.ma.us -----------------------------
                        The Lord is like a strong tower. 
             Those who do what is right can run to him for safety.
--------------------------- Proverbs 18:10 (niv) -----------------------------