kernel panics at google
willy tarreau
wtarreau en yahoo.fr
Vie Ene 21 01:48:19 CST 2000
> It happens a lot, but since the machines crash, and
> they don't have consoles, it's hard for us to save
> the kernel messages. But we have a few.
David, you can use the KMSGDUMP tool I developped for
this a while ago. Compile your kernel with it compiled
in and you can automatically dump all your messages
on a diskette previously inserted in the drive on a
kernel panic. You can also get into a simple text
interface in which you can scroll your messages, and
decide to dump them or print them via the parallel
port.
Please consult
http://www-miaif.lip6.fr/willy/kmsgdump/
for more info.
Since it raises only under weird circumstances (or
Alr+SysRq+d), you may experience difficulties to dump
your messages if the kernel is really stuck. I'm
working on a new release which does most of the job
at kernel startup. In this case, even a CPU reset or
triple fault could be enough to get all the messages.
Willy
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