From owner-freebsd-net@FreeBSD.ORG  Sat Jun 20 10:52:53 2009
Return-Path: <owner-freebsd-net@FreeBSD.ORG>
Delivered-To: net@freebsd.org
Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2001:4f8:fff6::34])
	by hub.freebsd.org (Postfix) with ESMTP id 1537C106566C;
	Sat, 20 Jun 2009 10:52:53 +0000 (UTC)
	(envelope-from freebsd-listen@fabiankeil.de)
Received: from smtprelay04.ispgateway.de (smtprelay04.ispgateway.de
	[80.67.31.27]) by mx1.freebsd.org (Postfix) with ESMTP id C8D798FC1B;
	Sat, 20 Jun 2009 10:52:52 +0000 (UTC)
	(envelope-from freebsd-listen@fabiankeil.de)
Received: from [62.143.132.243] (helo=localhost)
	by smtprelay04.ispgateway.de with esmtpsa (TLSv1:AES128-SHA:128)
	(Exim 4.68) (envelope-from <freebsd-listen@fabiankeil.de>)
	id 1MHxvq-00085n-OJ; Sat, 20 Jun 2009 12:36:24 +0200
Date: Sat, 20 Jun 2009 12:36:57 +0200
From: Fabian Keil <freebsd-listen@fabiankeil.de>
To: Jeff Roberson <jroberson@jroberson.net>
Message-ID: <20090620123657.21728020@fabiankeil.de>
In-Reply-To: <alpine.BSF.2.00.0906182307470.1025@desktop>
References: <alpine.BSF.2.00.0906182307470.1025@desktop>
X-Mailer: Claws Mail 3.7.1 (GTK+ 2.16.2; i386-portbld-freebsd8.0)
X-PGP-KEY-URL: http://www.fabiankeil.de/gpg-keys/freebsd-listen-2008-08-18.asc
Mime-Version: 1.0
Content-Type: text/plain; charset=US-ASCII
Content-Transfer-Encoding: 7bit
X-Df-Sender: 775067
Cc: current@freebsd.org, net@freebsd.org
Subject: Re: mbuf layout optimizations
X-BeenThere: freebsd-net@freebsd.org
X-Mailman-Version: 2.1.5
Precedence: list
List-Id: Networking and TCP/IP with FreeBSD <freebsd-net.freebsd.org>
List-Unsubscribe: <http://lists.freebsd.org/mailman/listinfo/freebsd-net>,
	<mailto:freebsd-net-request@freebsd.org?subject=unsubscribe>
List-Archive: <http://lists.freebsd.org/pipermail/freebsd-net>
List-Post: <mailto:freebsd-net@freebsd.org>
List-Help: <mailto:freebsd-net-request@freebsd.org?subject=help>
List-Subscribe: <http://lists.freebsd.org/mailman/listinfo/freebsd-net>,
	<mailto:freebsd-net-request@freebsd.org?subject=subscribe>
X-List-Received-Date: Sat, 20 Jun 2009 10:52:53 -0000

Jeff Roberson <jroberson@jroberson.net> wrote:

> http://people.freebsd.org/~jeff/mbuf2.diff

> This is a call for testers and feedback on my mbuf layout improvements. 
> I'm trying to decide whether I will push to have these included in 8.0. 
> After reducing the scope slightly from my last patch, I have not 
> encountered any problems.  Kip Macy has also been using it for the past 
> few weeks without issue.
> 
> You should not expect any functional changes from this patch.  The goal 
> is mostly to pave the way fors more sensible mbuf handling in the
> future, although it does offer a few performance benefits.

So far I haven't been able to reproduce the em-related panic I
reported with an earlier version of the patch. I'm not sure if
it was reproducible back then, though.

Fabian