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Date:      Mon, 12 Oct 1998 12:46:10 -0600 (MDT)
From:      "Kenneth D. Merry" <ken@plutotech.com>
To:        regnauld@deepo.prosa.dk (Philippe Regnauld)
Cc:        freebsd-current@FreeBSD.ORG
Subject:   Re: 3.0-19981009-BETA + 2840 AHA + camcontrol stop/start = panic
Message-ID:  <199810121846.MAA25828@panzer.plutotech.com>
In-Reply-To: <19981012194716.53997@deepo.prosa.dk> from Philippe Regnauld at "Oct 12, 98 07:47:16 pm"

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Philippe Regnauld wrote...
> Conf:	486-100 16MB
> SCSI:	AHA-2840 (Vesa controller)
> 		Seagate 1GB HAWK
> 
> Symptom:
> 
> - insalled 3.0-19981009-BETA, dedicated (entire disk) partition
> - rebooted, changed to root and typed (all this with the GENERIC kernel):
> 
> 	# camcontrol stop 	(click... spin down)... 
> 	[pause]
> 
> I get the prompt back
> 
> 	# camcontrol start	(spins up)
> 	camcontrol start/stop takes 0/1 argument
> 	#
> 
> couple of seconds later: panic...
> 
> virtual address: 0x24
> code:	sup. read, page not present
> inst pointer:	0x8:0xf010553d
> stack pointer:	0x10:0xf0277ee4
> frame pointer:	0x10:0xf0277eec
> code seg:		base 0x0, limit 0xfffff, type 0x1b
> 				dpl 0, pres 1, def32 1, gran 1
> ...
> interrupt mask:	cam
> trap #: 12
> panic: page fault
> 
> syncing disks... 1 1 1 1 1 1 1 ...  1 1 giving up

Patient: "Doctor, I shot myself in the foot and it hurts!"
Doctor:  "Well then, don't do that!"

It's generally not a good idea to spin down your boot drive.  I'm not sure
what's going on here, though.

Unless you can provide a stack trace, or at least the functions around the
given instruction pointer, there's no way to know where the panic is.

Try setting up a serial console and DDB so you can get a stack trace.

Ken
-- 
Kenneth Merry
ken@plutotech.com

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