From owner-freebsd-hackers  Sun May 26  8:30:31 2002
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Date: Sun, 26 May 2002 16:30:24 +0100
From: Ceri Davies <setantae@submonkey.net>
To: Dominic Marks <dominic_marks@btinternet.com>
Cc: hackers@FreeBSD.org
Subject: Re: Another panic in -STABLE, yesterday's tree
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	Dominic Marks <dominic_marks@btinternet.com>, hackers@FreeBSD.org
References: <20020526112641.GA396@submonkey.net> <20020526134812.A64544@host217-39-131-156.in-addr.btop>
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On Sun, May 26, 2002 at 01:48:12PM +0100, Dominic Marks wrote:
> On Sun, May 26, 2002 at 12:26:41PM +0100, Ceri Davies wrote:
> > 
> > I've had another kernel panic, this time from a cold boot (the machine had
> > been powered off overnight), with a new world and kernel built yesterday:
> > 
> > FreeBSD rhadamanth.private.submonkey.net 4.6-PRERELEASE FreeBSD 4.6-PRERELEASE #0: Wed May  1 21:59:38 BST 2002     setantae@rhadamanth.private.submonkey.net:/usr/obj/usr/src/sys/RHADAMANTH  i386
> > 
> > I've attached a backtrace - further information is available if someone
> > tells how to summon it from gdb (I won't delete vmcore this time...)
> 
> I had this problem. To get good backtraces I do the following. I don't
> know how "good" this method is, but it works for me.
> 
> After making your system with makeoptions="-g", add the following to
> /etc/rc.conf:
> 
> savecore_flags="-N /usr/obj/usr/src/sys/GALLIUM/kernel.debug"
> 
> Using the correct path for your kernel name. Then, in your crash dump
> directory (mine is /usr/crash) run gdb -k kernel.N vmcore.N and you
> should be able to get a good backtrace with symbols.

That backtrace is from a debug kernel though?
In my kernel config I have :
makeoptions     DEBUG=-g                #Build kernel with gdb(1) debug symbols

and after running "make installkernel" I just
cp /usr/obj/usr/src/sys/RHADAMANTH/kernel.debug /var/crash

Is that really not good enough (if not, I'll do it like you've suggested, but
I don't always keep /usr/obj around) ?

Thanks,

Ceri

-- 
get the cool shoe shine

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