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Date:      Thu, 7 Dec 2006 16:16:41 +0000 (GMT)
From:      Robert Watson <rwatson@FreeBSD.org>
To:        Paolo Pisati <piso@freebsd.org>
Cc:        Gleb Smirnoff <glebius@freebsd.org>, Andre Oppermann <andre@freebsd.org>, Perforce Change Reviews <perforce@freebsd.org>
Subject:   Re: PERFORCE change 111230 for review
Message-ID:  <20061207161434.O50906@fledge.watson.org>
In-Reply-To: <20061207142254.GA1195@tin.it>
References:  <200612062319.kB6NJgsq031755@repoman.freebsd.org> <20061207110225.GU32700@FreeBSD.org> <4578070A.2030609@freebsd.org> <20061207142254.GA1195@tin.it>

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On Thu, 7 Dec 2006, Paolo Pisati wrote:

> Then, after a discussion on irc, pull the plug on any present (and future) 
> hackery & half-baked solution, and declare in kernel libalias incompatible 
> with tso.

This seems silly -- why is it not compatible?  Perhaps I misunderstand, but I 
thought TSO passed down valid TCP/IP packets, they just happen to be really 
long, and will be post-processed by the hardware into a series of shorter 
segments with the same header properties.  Imagine the ethernet device as a 
"router" that's performing TCP fragmentation for you, rather than IP 
fragmentation.

Robert N M Watson
Computer Laboratory
University of Cambridge



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