From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id ; Thu, 3 Oct 2002 07:16:38 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id ; Thu, 3 Oct 2002 07:16:38 -0400 Received: from pizda.ninka.net ([216.101.162.242]:7889 "EHLO pizda.ninka.net") by vger.kernel.org with ESMTP id ; Thu, 3 Oct 2002 07:16:36 -0400 Date: Thu, 03 Oct 2002 04:14:49 -0700 (PDT) Message-Id: <20021003.041449.58450031.davem@redhat.com> To: linux_learning@yahoo.co.uk Cc: linux-kernel@vger.kernel.org, linux-c-programming@vger.kernel.org Subject: Re: this code does not get called in dev.c so do we need it? From: "David S. Miller" In-Reply-To: <20021003111356.51794.qmail@web13101.mail.yahoo.com> References: <20021002.171042.42890215.davem@redhat.com> <20021003111356.51794.qmail@web13101.mail.yahoo.com> X-FalunGong: Information control. X-Mailer: Mew version 2.1 on Emacs 21.1 / Mule 5.0 (SAKAKI) Mime-Version: 1.0 Content-Type: Text/Plain; charset=us-ascii Content-Transfer-Encoding: 7bit Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org From: will fitzgerald Date: Thu, 3 Oct 2002 12:13:56 +0100 (BST) you say that fast routing occurs in the device driver level. how does it send a packet from router eth0 to router eth1? is it on the bus? (is this like zero copy jumping from one device directly to another?) It passes the packet directly to the output method of the target device for the route. Just like I said in my original email, nothing more nothing less. if fast routing saves time in not having to go to the ip layer why is it not used alll the time? Because it is used only by a limited number of people and it makes drivers harder to maintain since very few people have the setups necessary to test this feature properly. is it buggy? No.