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Date:      Sat, 17 Oct 1998 18:02:57 -0500
From:      Tom Jackson <toj@gorilla.net>
To:        Chuck Robey <chuckr@mat.net>, freebsd-current@FreeBSD.ORG
Subject:   Re: panic
Message-ID:  <19981017180257.A21925@TOJ.org>
In-Reply-To: <Pine.BSF.4.05.9810171544170.350-100000@picnic.mat.net>; from Chuck Robey on Sat, Oct 17, 1998 at 03:50:02PM -0400
References:  <Pine.BSF.4.05.9810171544170.350-100000@picnic.mat.net>

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On Sat, Oct 17, 1998 at 03:50:02PM -0400, Chuck Robey wrote:
> I'm now getting a panic on startup, SMP kernel, on a config file that
> was working fine a few days ago.  The panic is coming in module_register
> + 14.  I'd give you the stack dump, but I can't seem to get a kernel
> dump captured yet.

I'm getting this crash, not on elf(kernel+exec)/smp/scsi but on a old
Thinkpad with a pccard ed0, a elf(kernel+exec)/up/ide. Thought since the
reference to modules that pcvt instead of sc0 might work - no such luck.
I get the panic right after the pcic is probed and before the pccard is
initialized.

>From the instruction pointer, nm /kernel | sort gives module_init.

> 
> I checked, all my LKMs are brand new.  This is a fresh build for both
> the world and the kernel from equal sources (no intervening cvsup or cvs
> actions), with all new LKMs.  Normal ELF system you'd expect.
> 
> Panic is supervisor read, page not present.  Can't tell what module it
> was trying to load without the kernel dump (I think).  Panic message
> says it's in the swapper process, but I think that's not germane here
> (is it?).  I have a fault virtual address of 8be58955, I'm not sure
> that's useful, seeing as I can't translate that to a module address.
> 
> How do I force a kernel dump?
I'm not getting any crash dumps on any of my elf systems.
> 
> ----------------------------+-----------------------------------------------
> Chuck Robey                 | Interests include any kind of voice or data 
> chuckr@glue.umd.edu         | communications topic, C programming, and Unix.
> 213 Lakeside Drive Apt T-1  |
> Greenbelt, MD 20770         | I run Journey2 and picnic (FreeBSD-current)
> (301) 220-2114              | and jaunt (NetBSD).
> ----------------------------+-----------------------------------------------
> 
> 
> 
> 
> 
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-- 
Tom

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