From owner-freebsd-arch@FreeBSD.ORG  Mon Mar 24 14:53:37 2008
Return-Path: <owner-freebsd-arch@FreeBSD.ORG>
Delivered-To: arch@freebsd.org
Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2001:4f8:fff6::34])
	by hub.freebsd.org (Postfix) with ESMTP id A7066106566B;
	Mon, 24 Mar 2008 14:53:37 +0000 (UTC)
	(envelope-from petri@helenius.fi)
Received: from silver.he.iki.fi (helenius.fi [83.150.107.219])
	by mx1.freebsd.org (Postfix) with ESMTP id 5C5158FC18;
	Mon, 24 Mar 2008 14:53:37 +0000 (UTC)
	(envelope-from petri@helenius.fi)
Received: from localhost (localhost [127.0.0.1])
	by silver.he.iki.fi (Postfix) with ESMTP id 69359DF49;
	Mon, 24 Mar 2008 16:31:00 +0200 (EET)
Received: from silver.he.iki.fi ([127.0.0.1])
	by localhost (silver.he.iki.fi [127.0.0.1]) (amavisd-new, port 10024)
	with ESMTP id ymvqJQKR1Yfl; Mon, 24 Mar 2008 16:30:53 +0200 (EET)
Received: from [83.150.107.194] (d194.helenius.fi [83.150.107.194])
	by silver.he.iki.fi (Postfix) with ESMTP;
	Mon, 24 Mar 2008 16:30:53 +0200 (EET)
Message-ID: <47E7BB1C.4020703@helenius.fi>
Date: Mon, 24 Mar 2008 16:30:52 +0200
From: Petri Helenius <petri@helenius.fi>
User-Agent: Thunderbird 2.0.0.12 (Windows/20080213)
MIME-Version: 1.0
To: Robert Watson <rwatson@FreeBSD.org>
References: <20080317133029.GA19369@sub.vaned.net>	<20080317134335.A3253@fledge.watson.org>	<20080324140623.GA14941@sub.vaned.net>
	<20080324141334.T7797@fledge.watson.org>
In-Reply-To: <20080324141334.T7797@fledge.watson.org>
Content-Type: text/plain; charset=ISO-8859-1; format=flowed
Content-Transfer-Encoding: 7bit
Cc: arch@freebsd.org, freebsd-current@freebsd.org, net@freebsd.org
Subject: Re: HEADS UP: zerocopy bpf commits impending
X-BeenThere: freebsd-arch@freebsd.org
X-Mailman-Version: 2.1.5
Precedence: list
List-Id: Discussion related to FreeBSD architecture <freebsd-arch.freebsd.org>
List-Unsubscribe: <http://lists.freebsd.org/mailman/listinfo/freebsd-arch>,
	<mailto:freebsd-arch-request@freebsd.org?subject=unsubscribe>
List-Archive: <http://lists.freebsd.org/pipermail/freebsd-arch>
List-Post: <mailto:freebsd-arch@freebsd.org>
List-Help: <mailto:freebsd-arch-request@freebsd.org?subject=help>
List-Subscribe: <http://lists.freebsd.org/mailman/listinfo/freebsd-arch>,
	<mailto:freebsd-arch-request@freebsd.org?subject=subscribe>
X-List-Received-Date: Mon, 24 Mar 2008 14:53:38 -0000


Pardon the basic question, but is the current patchset "zero copy" or 
"one copy"? The paper I saw a link to described a mechanism to eliminate 
one of the two copies the traditional bpf approach makes but I haven't 
taken a look into the actual code.

Pete