Date: Sun, 10 Feb 2002 09:52:21 -0500 From: Bill Kish <kish@coyotepoint.com> To: Terry Lambert <tlambert2@mindspring.com> Cc: hackers <freebsd-hackers@FreeBSD.ORG> Subject: Re: Debugging double page fault Message-ID: <3C668925.EFF8FA34@coyotepoint.com> References: <3C6478BE.BE6F5A70@coyotepoint.com> <3C6497EA.73CDEC64@mindspring.com>
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Hi Terry,
Nothing's changed hardware or configuration wise. Since this system handles alot
of network traffic, I was thinking it might be some kind of martian packet causing
the crash. I'd seen that happen before with RR pings from Linux systems, but at
least had a reasonable dump to work with.
I'll try swapping out the hardware and see what happens. But I'm still curious
about a methodology for analyzing such dumps.
-=BK
Terry Lambert wrote:
> Bill Kish wrote:
> > I've recently started seeing "double fault" panics on a formerly FreeBSD
> > 2.2.8 based system (It's running 2.2.8 as a somewhat embedded OS, so please
> > don't flame me about being back rev!)
> [ ... ]
> > My rough understanding is that double faults are usually the result of
> > running out of stack, and that the underlying cause of the panic can probably
> > be uncovered if I can find the previous stack .
> >
> > Can anyone point me towards some hints for debugging this sort of crash. Any
> > advice greatly appreciated.
>
> It's very old.
>
> This makes me think that it used to work, and now it
> doesn't.
>
> What did you change just before it stopped working?
>
> If nothing, then it's likely a hardware problem.
>
> -- Terry
--
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Bill Kish Ph: 650.969.6000
Chief Engineer, 12 S. First Street, Suite 616
Coyote Point Systems Inc. San Jose, CA 95113
Email: kish@coyotepoint.com http://www.coyotepoint.com/
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