From owner-freebsd-net@FreeBSD.ORG  Mon Sep 20 19:57:41 2004
Return-Path: <owner-freebsd-net@FreeBSD.ORG>
Delivered-To: freebsd-net@freebsd.org
Received: from mx1.FreeBSD.org (mx1.freebsd.org [216.136.204.125])
	by hub.freebsd.org (Postfix) with ESMTP
	id 0E5CE16A4CE; Mon, 20 Sep 2004 19:57:41 +0000 (GMT)
Received: from silver.he.iki.fi (helenius.fi [193.64.42.241])
	by mx1.FreeBSD.org (Postfix) with ESMTP
	id D603C43D41; Mon, 20 Sep 2004 19:57:39 +0000 (GMT)
	(envelope-from pete@he.iki.fi)
Received: from [193.64.42.134] (h86.vuokselantie10.fi [193.64.42.134])
	by silver.he.iki.fi (8.12.10/8.11.4) with ESMTP id i8KJvbm1007926;
	Mon, 20 Sep 2004 22:57:37 +0300 (EEST)
	(envelope-from pete@he.iki.fi)
Message-ID: <414F3636.1040807@he.iki.fi>
Date: Mon, 20 Sep 2004 22:57:42 +0300
From: Petri Helenius <pete@he.iki.fi>
User-Agent: Mozilla/5.0 (Windows; U; Windows NT 5.1; en-US;
	rv:1.7.2) Gecko/20040803
X-Accept-Language: en-us, en
MIME-Version: 1.0
To: Andre Oppermann <andre@freebsd.org>
References: <20040905121111.GA78276@cell.sick.ru>
	<4140834C.3000306@freebsd.org> <20040909171018.GA11540@cell.sick.ru>
	<4140A8F5.92E4A2DF@freebsd.org>
In-Reply-To: <4140A8F5.92E4A2DF@freebsd.org>
Content-Type: text/plain; charset=us-ascii; format=flowed
Content-Transfer-Encoding: 7bit
cc: Gleb Smirnoff <glebius@freebsd.org>
cc: net@freebsd.org
Subject: pfil question
X-BeenThere: freebsd-net@freebsd.org
X-Mailman-Version: 2.1.1
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: Mon, 20 Sep 2004 19:57:41 -0000

Andre Oppermann wrote:

>BTW: You may be better off using pfil_hooks instead of netgraph for your
>tool.  You'll save one m_copym and m_freem for each packet.
>
>  
>
Is pfil zero copy or one copy by default? If the driver supports it, 
does a packet get directly DMA'd in mbufs and passed over the pf which 
then drops the packet if applicable?

Also, did the locking work for network stack in 5.3 make pf fully 
parallel so packets arriving can be processed by multiple CPU's? Do 
these need to be coming in from multiple interfaces or can even packets 
from one interface be distributed among multiple CPU's?

Pete