On Wed, Apr 08, 2009 at 01:31:05AM +0000, Bryan wrote: > okay, I can pop back out to the ddb> prompt if I ctrl-alt-esc again, > but nothing is > happening when I type "continue", it goes back to the blinking cursor. No > messages, but I did take a screenshot of "ps" and "trace". By the way, the > "hangman" feature is interesting... > > I uploaded them here... > http://picasaweb.google.com/brakeb/31MarchOpenBSDIssue?feat=directlink
This one is interesting, the kernel seems to hang in disksort() before you interrupt it by dropping into the debugger: http://picasaweb.google.com/brakeb/31MarchOpenBSDIssue?feat=directlink#5322148143036975074 That function has two loops in it -- maybe one of them does not terminate for some reason? > trace_2.jpg is much the same as trace_1, but there are 2 lines at the > bottom that I thought would be important. > > I did do a boot dump, and after I rebooted, I went into that "gdb" > that was talked about in crash(8), > did a "file /var/crash/bsd.0", and then "where" > > It said "No stack." You also need "target kvm /var/crash/bsd.0.core". But I'd say you won't see much different stuff then on http://picasaweb.google.com/brakeb/31MarchOpenBSDIssue?feat=directlink#5322148143036975074 That trace should already be quite helpful and should be analised by a competent person capable of asking further questions to pin-point the issue (i.e. not me). For the future: The trace you get from a crash dump won't be of much use unless you compile your kernel with debug symbols. I have a config DEBUG.MP for that which goes: include "arch/i386/conf/GENERIC.MP" makeoptions DEBUG="-g" If you use GENERIC instead of GENERIC.MP you might have to adjust this obviously. Compiling a kernel with that option will give you file called "bsd.gdb" as well as "bsd". You mus then boot that "bsd" kernel and reproduce the crash again. Don't use your old kernel, it likely won't match the bsd.gdb. bsd.gdb is not bootable, but you can pass that to the "file" command of gdb to get a meaningful stack trace from a crash dump, i.e.: file /bsd.gdb target kvm /var/crash/bsd.0.core where Stefan
