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To: Jonathan Chen <jonc@pinnacle.co.nz>
cc: freebsd-questions@freebsd.org
Subject: Re: Kernel panic in 2.2.2R with ppp 
In-reply-to: Your message of "Wed, 19 Nov 1997 11:47:15 +1300."
             <Pine.SGI.3.96.971119113333.6961A-100000@tui.pinnacle.co.nz> 
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Date: Wed, 19 Nov 1997 00:54:01 +0000
From: Brian Somers <brian@awfulhak.org>
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Wow, I'm impressed :-)  This is the first time I've seen ppp cause a 
panic :-)

Seriously, as you already suspect, it can't really be ppp that's 
causing the problem.  I'd suspect a memory problem.  Is the 
instruction pointer the same each time ?  If so, the only way to 
diagnose this is to rebuild your kernel with symbols (-g), wait for 
it to crash again, and try to find out where the instruction pointer 
is pointing.

> Hi,
> 
> I've got a measly '386 with 8Mb running running FreeBSD 2.2.2 and
> ppp (latest version off http://www.freebsd.org/~brian/) -auto -alias
> onto a small network, which works fine most of the time. However, there
> have been 2 kernel panics (in the 4 months of usage), which I suspect
> happens under when memory runs very low. I'd have expected ppp to die
> instead of O/S, though.
> 
> I intend to upgrade to 2.2.5-R, when my CD arrives (it sure is taking
> a long time..), but I thought I'd bring this to the attention of
> freebsd-questions.
> 
> kakapo kernel log messages:
> > 
> > 
> > Fatal trap 12: page fault while in kernel mode
> > fault virtual address	= 0xf057a000
> > fault code		= supervisor read, page not present
> > instruction pointer	= 0x8:0xf013d087
> > stack pointer	        = 0x10:0xefbffd80
> > frame pointer	        = 0x10:0xefbffd9c
> > 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		= 24356 (ppp)
> > interrupt mask		= 
> > panic: page fault
> > 
> > syncing disks... 15 15 14 11 6 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 giving up
> 
> --
> Jonathan Chen <jonc@pinnacle.co.nz>   | "Vini, vidi, velcro...
>                                       |    I came, I saw, I stuck around"
> 

-- 
Brian <brian@Awfulhak.org>, <brian@FreeBSD.org>, <bri@OpenBSD.org>
      <http://www.Awfulhak.org>
Don't _EVER_ lose your sense of humour....