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Date:      Tue, 13 Jul 2004 15:42:09 -0400 (EDT)
From:      Robert Watson <rwatson@FreeBSD.org>
To:        Daniel Lang <dl@leo.org>
Cc:        current@FreeBSD.org
Subject:   Re: panic: m_copym, length > size of mbuf chain
Message-ID:  <Pine.NEB.3.96L.1040713154136.88111H-100000@fledge.watson.org>
In-Reply-To: <20040711100553.GA64553@atrbg11.informatik.tu-muenchen.de>

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On Sun, 11 Jul 2004, Daniel Lang wrote:

> referring to your first answer, the 'len' parameter in the tcp_output.c
> frame is 1460, offset is 737. The sum is obviously greater than 975, the
> value of so->so_snd.sb_cc. 
> 
> So the suggested assertion from Robert would have been triggered. I
> consider now adding the SOCKBUF_DEBUG value. However, with SACK
> disabled, the machine is still up and running now. 

Is it possible to get the box running with SACK again for debugging
purposes?  Resolving this issue would be a very good thing.  Thanks!

Robert N M Watson             FreeBSD Core Team, TrustedBSD Projects
robert@fledge.watson.org      Principal Research Scientist, McAfee Research




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