Date: Sun, 23 Jul 2000 09:27:30 +0930 From: Greg Lehey <grog@lemis.com> To: Chris Hardie <chris@summersault.com> Cc: freebsd-questions@FreeBSD.ORG Subject: Re: mysterious ffs_clusteralloc kernel panics: need help! Message-ID: <20000723092730.M78588@wantadilla.lemis.com> In-Reply-To: <Pine.BSF.4.21.0007220808510.590-100000@summersault.com> References: <20000721091234.G936@wantadilla.lemis.com> <Pine.BSF.4.21.0007220808510.590-100000@summersault.com>
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On Saturday, 22 July 2000 at 8:13:45 -0500, Chris Hardie wrote:
>
>>>> OK, now do a backtrace ('bt').
>>>
>>
>> You need the kernel with debugging symbols, which you appear to have.
>> But this isn't the one. Take a look at
>> http://www.lemis.com/vinum/how-to-debug.html for further details.
>
> Sorry about that. Here's the output of a backtrace from a kernel
> compiled with debugging turned on:
>
> (kgdb) bt
> #0 0xc0163a5b in boot ()
> #1 0xc0163ce0 in at_shutdown ()
> #2 0xc015f9e0 in lockmgr ()
> <snip>
> #24 0x80480e9 in ?? ()
No, this kernel doesn't have symbols.
> I'm afraid it doesn't look much different than the one I previously
> sent, so I suspect perhaps I'm doing something wrong. I'm a little
> out of my league here. I'll attempt to recompile and install the
> kernel from scratch with debugging on, and then let you know what
> happens when it crashes next Wednesday or Thursday (crashed this
> morning at 3:30, right on "schedule", grrr).
I'd assume that you compiled with -g and then installed the stripped
version of the kernel. That's fine, you just need to find the
unstripped version, which will be in
/usr/src/sys/compile/MYKERNEL/kernel.debug, for your value of
MYKERNEL. This is described in the web page I refer to above.
Greg
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