Date: Thu, 22 Feb 2007 05:22:24 -0800 From: Jeremy Chadwick <koitsu@FreeBSD.org> To: Alexander Shikoff <minotaur@crete.org.ua> Cc: freebsd-stable@freebsd.org Subject: Re: Cannot obtain kernel dump in /var/crash Message-ID: <20070222132224.GA14615@icarus.home.lan> In-Reply-To: <20070222115644.GA55416@crete.org.ua> References: <20070222115644.GA55416@crete.org.ua>
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On Thu, Feb 22, 2007 at 01:56:44PM +0200, Alexander Shikoff wrote: > Hello, > > I've discovered reproducable kernel panic but I cannot obtain a dump. > > I have in rc.conf: > > dumpdev="/dev/ad2s1b" > savecore_flags="-f" > > ... and in kernel configuration: > > options KDB > options DDB > options KDB_UNATTENDED > makeoptions DEBUG=-g # Build kernel with gdb(1) debug symbols > > My RAM size is 768 MB and swap size is 1024 MB. > > When rebooting after a crash I see in console: > Feb 22 13:40:41 crete savecore: unable to force dump - bad magic > Feb 22 13:40:41 crete savecore: no dumps found > > Any suggestions? Thanks. Is /dev/ad2s1b the correct location? Possibly you meant ad0s1b or some other adX device? (Common mistake.) Do you have a swap device defined, particularly in /etc/fstab?o What does swapinfo say? Does the same happen if you say dumpdev="auto" or if you remove the -f flag from savecore_flags? It may be worth peeking through /etc/rc.d/dumpon and imitating some of the commands there to see if you can reproduce it. -- | Jeremy Chadwick jdc at parodius.com | | Parodius Networking http://www.parodius.com/ | | UNIX Systems Administrator Mountain View, CA, USA | | Making life hard for others since 1977. PGP: 4BD6C0CB |
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