Date: Fri, 29 May 2009 14:27:04 +1000 From: David N <davidn04@gmail.com> To: freebsd-hackers@freebsd.org Subject: Debugging via DDB Message-ID: <4d7dd86f0905282127u5215979akdd8ea286c73f090e@mail.gmail.com>
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Hi, I know this might sound like a newbie question. I'm trying to debug a "Lockup" on 7.2-RELEASE. I've compiled DDB and KDB into the kernel and make installkernel. (Can this be called a deadlock?) The machine still response to pings, but it looks like all disk activity has stopped. I can break into the debugger using CTRL-ALT-ESC, but after that, i dont know what I'm looking for in particular. bt (backtrace) gives me the stuff like the keyboard mutex ( i assume it was the last thing that happened, but obviously it was the break) Should I be including WITNESS? Regards David N
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