Date: Mon, 12 Jan 2009 19:00:10 +0000 From: Pete French <petefrench@ticketswitch.com> To: petefrench@ticketswitch.com, rwatson@FreeBSD.org Cc: freebsd-stable@freebsd.org, drosih@rpi.edu, rblayzor.bulk@inoc.net Subject: Re: Big problems with 7.1 locking up :-( Message-ID: <E1LMS1C-0002x6-Je@dilbert.ticketswitch.com>
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> I'm not sure if you've done this already, but the normal suggestions apply: > have you compiled with INVARIANTS/WITNESS/DDB/KDB/BREAK_TO_DEBUGGER, and do > any results / panics / etc result? Sometimes these debugging tools are able > to convert hangs into panics, which gives us much more ability to debug them. OK, I have now had a machine hand again, with the correct debug options in the kernel. The screen looked like this when I went to restart it: http://toybox.twisted.org.uk/~pete/71_lor2.png It had not, however, dropped into any kind of debugger. Also there appear to me console messages after the lock order reversal - is that normal ? The machine did stay up for a signifanct amount of time before doing this. I notice that it is more or less identical to the one I posted whenI had WITNESS_KDB in the kernel too, so maybe those results arent entirely suprious after all ? Given it hasnt dropped to a debugger, is there anything else I can try ? -pete.
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