From owner-freebsd-questions  Tue Mar  6 21:51:21 2001
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From: Mike Meyer <mwm@mired.org>
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Date: Tue, 6 Mar 2001 23:51:17 -0600
To: Trevin Chow <tmchow@sfu.ca>
Cc: questions@freebsd.org
Subject: Re: Kernel Crashing -- tail of vmcore.0
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Trevin Chow <tmchow@sfu.ca> types:
> Hi,
> 
> My kernel has been crashing like crazy at unexpected times, usually
> during heavy load (usually while I"m compiling something).
> 
> I had no idea why, but on recommendation of someone on the list I
> installed a debugging kernel and set dumpdev in my /etc/rc.conf file.
> 
> Here is the tail of my /var/crash/vmcore.0 file:

That's a bit surprising for what's in vmcore. Anyway, what you need to
do is get a stack trace from the vmcore and vmkernel
files. Information on how to do that is in the handbook section on
"kernel debugging".

	<mike

> -------------------
> mode = 0100644, inum = 450752, fs = /usr
> panic: ffs_valloc: dup alloc
> 
> syncing disks... 119 117 91 61 28 7
> done
> Uptime: 1d18h32m12s
> 
> dumping to dev #ad/0x20001, offset 163840
> dump ata0: resetting devices .. done
> 48 47 46 45 44 43 42 41 40 39 38 37 36 35 34 33 32 31 30 29 28 27 26 25 24
> 23 22 21 20 19 18 17 16 15 14 13 12 11 10 9 8 7 6 5 4 3 2
>  1
> ------------------
> 
> Does this help at all in diagnosing the cause of my crashes?
> 
> 
> Regards,
> Trevin Chow
> 
> 
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--
Mike Meyer <mwm@mired.org>			http://www.mired.org/home/mwm/
Independent WWW/Perforce/FreeBSD/Unix consultant, email for more information.

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