From owner-freebsd-net@FreeBSD.ORG Tue Nov 11 22:45:40 2003 Return-Path: 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 ACDD416A4CE for ; Tue, 11 Nov 2003 22:45:40 -0800 (PST) Received: from silver.he.iki.fi (helenius.fi [193.64.42.241]) by mx1.FreeBSD.org (Postfix) with ESMTP id 3D80E43FAF for ; Tue, 11 Nov 2003 22:45:39 -0800 (PST) (envelope-from pete@he.iki.fi) Received: from he.iki.fi (localhost [127.0.0.1]) by silver.he.iki.fi (8.12.9p2/8.11.4) with ESMTP id hAC6jZgr013529; Wed, 12 Nov 2003 08:45:36 +0200 (EET) (envelope-from pete@he.iki.fi) Message-ID: <3FB1D6F5.8020403@he.iki.fi> Date: Wed, 12 Nov 2003 08:45:09 +0200 From: Petri Helenius User-Agent: Mozilla/5.0 (Windows; U; Windows NT 5.1; en-US; rv:1.5) Gecko/20031007 X-Accept-Language: en-us, en MIME-Version: 1.0 To: popsong old References: <20031112024507.89398.qmail@web10007.mail.yahoo.com> In-Reply-To: <20031112024507.89398.qmail@web10007.mail.yahoo.com> Content-Type: text/plain; charset=us-ascii; format=flowed Content-Transfer-Encoding: 7bit cc: freebsd-net@freebsd.org Subject: Re: tcp hostcache and ip fastforward for review X-BeenThere: freebsd-net@freebsd.org X-Mailman-Version: 2.1.1 Precedence: list List-Id: Networking and TCP/IP with FreeBSD List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Wed, 12 Nov 2003 06:45:40 -0000 popsong old wrote: >Ah, my fault. I didn't read your patch carefully and assumed that ip >fastforward do flow caching as ip_flow does. However, I think ip flow >caching is a good thing and maybe implementing it in ip fastforward is >a good idea. > > > Caching flows has mixed results, it works for you if you have to keep flow-based state like in firewalling situations but usually takes performance in generic packet forwarding because of the great number of flows per host in current public Internet. Pete