Date: Fri, 11 May 2007 17:38:30 -0400 From: Kris Kennaway <kris@obsecurity.org> To: Roger Miranda <rmiranda@digitalrelay.ca> Cc: freebsd-stable@freebsd.org, Kris Kennaway <kris@obsecurity.org> Subject: Re: Hard Hang, nothing in logs / no panics Message-ID: <20070511213830.GA31604@xor.obsecurity.org> In-Reply-To: <200705111621.26691.rmiranda@digitalrelay.ca> References: <200705111442.52523.rmiranda@digitalrelay.ca> <20070511210002.GA29988@xor.obsecurity.org> <200705111621.26691.rmiranda@digitalrelay.ca>
next in thread | previous in thread | raw e-mail | index | archive | help
On Fri, May 11, 2007 at 04:21:25PM -0500, Roger Miranda wrote: > On Friday 11 May 2007 16:00, Kris Kennaway wrote: > > See the developers handbook chapter on kernel debugging. > > Kris, I have gone through the kernel debugging sections of the developers > handbook. The one problem is when I get a hard hang, I do not get any error > or panics. And there is no crash or dump data on reboot. Yes. I have enabled > DDB and KDB and a dumpdir (in /etc/rc.conf) > > Am I missing something in the kernel debugging section? I see "11.9 Debugging > Deadlocks" talk about Deadlocks. But at the time of the lock I have no way > of doing a ps or really anything as the system is locked up solid. You missed that the debugger is there to debug bugs (including deadlocks). Break to the debugger and obtain the necessary debugging :) Kris
Want to link to this message? Use this URL: <https://mail-archive.FreeBSD.org/cgi/mid.cgi?20070511213830.GA31604>