At 02\05\24 14:52 +0200 Friday, Georg-W. Koltermann wrote:
>I got a couple of kernel panics recently, some of them "buffer not
>locked". I would like to know how I can get more information out of the
>The system's gdb does not like the dump format any more, see also
>bin/38236. There is an advertised workaround in that pr of using gdb52,
>but I couldn't get that to work ("not a core dump: File format not
>Am I missing something? How do you guys read your dumps?
There are online articles on how to get and read kernel panic dumps, at
these webpages. Also I copy parts views the articles.
System Panics, Part 1: Preparing for the Worst (21 March 2002),
by Mr. M. Lucas
Add: options DDB makeoptions DEBUG=-g to config file.
A large enough swap file is needed for the dump.
Specify in /etc/rc.conf: dumpdev="/dev/ad0s4b", the dumpdir may be
specified to be /var/crash.
System Panics, Part 2: Recovering and Debugging (4 April 2002)
savecore(8) should copy a dump of the crashed kernel to /var/crash and
created files kernel.0 and vmcore.0.
gdb -k kernel.0 vmcore.0
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