Date: Sat, 17 Nov 2001 14:17:32 -0800 From: "George V. Neville-Neil" <gnn@neville-neil.com> To: Julian Elischer <julian@elischer.org> Cc: Peter Wemm <peter@wemm.org>, Julian Elischer <julian@vicor-nb.com>, current@FreeBSD.ORG, net@FreeBSD.ORG, wollman@FreeBSD.ORG Subject: Re: re-entrancy and the IP stack. Message-ID: <200111172215.OAA421007@meer.meer.net> In-Reply-To: Message from Julian Elischer <julian@elischer.org> of "Fri, 16 Nov 2001 16:13:41 PST." <Pine.BSF.4.21.0111161611270.6632-100000@InterJet.elischer.org>
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I recommend you all look at The Click Modular router http://www.pdos.lcs.mit.edu/click/ which is a step in the right direction. Of course given the current architecture it may be very hard to adapt it to this kind of model. I led/worked on a project at Wind River Systems to do a multi-instance stack based off of the 4.4 BSD lite code. I can tell you that without quite a bit of rearchitecting what you get is always a hack. There are (were?) over 100 global variables in the 4.4BSD lite code. I've not counted on 4.4 or -CURRENT so I can't say. There are also the issues of the locks though I suspect in -CURRENT (since the kernel is MP) you have handled these in some way. An extensible, multi-threaded TCP/IP would NOT look like the 4.4BSD-Lite code. Is this a goal of FreeBSD now? I am working on some things to make this possible but it is independent of FreeBSD and very very early days as yet. Later, George To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-net" in the body of the message
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