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Date:      02 May 2002 19:35:50 +0300
From:      Harald Schmalzbauer <H@Schmalzbauer.de>
To:        John Baldwin <jhb@FreeBSD.org>
Cc:        freebsd-current@FreeBSD.org
Subject:   Re: CD-Boot hangs on rootmounting MD (+DP1 crashes)
Message-ID:  <1020357351.4519.8.camel@hry.muc.wearix.com>
In-Reply-To: <XFMail.20020502104451.jhb@FreeBSD.org>
References:  <XFMail.20020502104451.jhb@FreeBSD.org>

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Am Do , 2002-05-02 um 17.44 schrieb John Baldwin:
> 
> On 02-May-2002 Harald Schmalzbauer wrote:
> > Am Do , 2002-05-02 um 13.29 schrieb Harald Schmalzbauer:
> > 
> > PXEbooting the -stable kernel.gz and mfsroot results in the same system
> > hang (mounting root from ufs:/dev/md0c).
> > 
> > DP1 crashes with the following:
> > unknown: <PNP0303> can't assign resources (port)
> > unknown: <PNP0c03> can't assign resources (memory)
> > psmcpnp0: irq resource info is missing; assuming irq 12
> > 
> > Fatal trap12: page fault while in kernel mode
> > fault virtual address = 0x0
> > fault code            = supervisor read, page not present
> > instruction pointer   = 0x8:0xc164cac1
> > stack pointer         = 0x10:0xcb931d00
> > frame pointer         = 0x10:0xcb931d1c
> > code segment          = base 0x0, limit 0xfffff, type 0x1b
> >                       DPL 0, pres 1, def32 1, gran 1
> > processor eflags      = interrupt enabled, resume, IOPL = 0
> > current process               = 27 (irq10: sn0)
> > trap number           = 12
> > panic: page fault
> 
> Can you stick ddb in this kernel adn get a traceback?  It's a NULL
> pointer dereference bug.
> 
> Actually, for DP1, isn't ddb already in the kernel?

OK, I found kernel.debug on the CD which I pxebooted and after typing
't' it gives me the following:

_end(c2521300,cdaf7d48,c2521300,c0232754,0) at 0xc252da80
fork_exit(c0232754,c2521300,cdaf7d48) at fork_exit+0x98
fork_trampoline() at fork_trampoline+0x8

Just for info: I forgot to mention the built-in Bluetooth.

Hope this helps,

-Harry

> 
> -- 
> 
> John Baldwin <jhb@FreeBSD.org>  <><  http://www.FreeBSD.org/~jhb/
> "Power Users Use the Power to Serve!"  -  http://www.FreeBSD.org/
> 
> 
> 
> 




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