From owner-freebsd-stable@FreeBSD.ORG  Wed Oct 17 08:57:51 2007
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To: stable@freebsd.org
From: Bengt Ahlgren <bengta@sics.se>
In-Reply-To: <20071015203202.GA17964@pp.htv.fi> (Esa Karkkainen's message of
	"Mon, 15 Oct 2007 23:32:02 +0300")
References: <20071004165755.GA1049@pp.htv.fi> <47120D83.1010703@FreeBSD.org>
	<20071015203202.GA17964@pp.htv.fi>
Date: Wed, 17 Oct 2007 10:26:12 +0200
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Subject: Re: Reproducable, possibly NFS related, fatal double fault in
 6.2-R-p7
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Esa Karkkainen <ejk@iki.fi> writes:

> On Sun, Oct 14, 2007 at 02:37:23PM +0200, Kris Kennaway wrote:
>> Esa Karkkainen wrote:
>> >	I get "Fatal double fault" error when writing to a filesystem
>> >mounted from NFS server.
>
> I got an offlist reply in which he suggested that the problem might be
> in nve driver.

That was me.  I indeed got the same fault when running NFS over nve.
Switching to nfe solved the problem for me.  The on-screen backtrace
reveals the true location of the problem.  See:

http://www.sics.se/~bengta/FBSD/DSC00585.JPG

I do have a dump, but for some reason kgdb is not able to show the
same information.

Regards,

Bengt