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Date: Sun, 28 Nov 2004 16:43:08 +0100
From: Arjan Van Leeuwen <avleeuwen@gmail.com>
To: Robert Watson <rwatson@freebsd.org>
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References: <d86b48730411091641640ce546@mail.gmail.com>
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cc: freebsd-stable@freebsd.org
Subject: Re: Panic in 5.3, related to network traffic
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Just a small update: disabling SACK is a good workaround for this one, too.

Arjan

On Sat, 13 Nov 2004 21:38:31 +0100, Arjan Van Leeuwen
<avleeuwen@gmail.com> wrote:
> On Wed, 10 Nov 2004 16:42:01 +0000 (GMT), Robert Watson
> 
> 
> <rwatson@freebsd.org> wrote:
> >
> > On Wed, 10 Nov 2004, Arjan Van Leeuwen wrote:
> >
> > > > Could you send a copy of your dmesg?  Could you also use gdb on a kernel
> > > > with debug symbols or addr2line to convert the function+offsets in the
> > > > trace to file and line number in the source?  This is a NULL pointer
> > > > dereference, so presumably somewhere there is a poor assumption about
> > > > memory allocation or the like.
> > >
> > > dmesg is attached.
> >
> > Could you say a little about how ipfilter is being used on the box; would
> > it be possible to test with it disabled?
> 
> I've converted my ipfilter/ipnat system to ipfw/natd, and now the
> problem is "solved".
> 
> However, your patch still gives me a *lot* of icmp_error: n_spare != n
> messages. I also noticed that if I ping from that system, it pings
> every 2 seconds instead of every second. The clock doesn't seem to be
> affected, and changing kern.timecounter.hardware doesn't change the
> situation.
> 
> Arjan
> 
> 
> 
> >
> >
> >
> > Robert N M Watson             FreeBSD Core Team, TrustedBSD Projects
> > robert@fledge.watson.org      Principal Research Scientist, McAfee Research
> >
> >
>