From owner-freebsd-arch@FreeBSD.ORG Thu Sep 2 17:23:16 2004 Return-Path: Delivered-To: freebsd-arch@freebsd.org Received: from mx1.FreeBSD.org (mx1.freebsd.org [216.136.204.125]) by hub.freebsd.org (Postfix) with ESMTP id 535D916A4D0; Thu, 2 Sep 2004 17:23:16 +0000 (GMT) Received: from odin.ac.hmc.edu (Odin.AC.HMC.Edu [134.173.32.75]) by mx1.FreeBSD.org (Postfix) with ESMTP id 3176243D2D; Thu, 2 Sep 2004 17:23:16 +0000 (GMT) (envelope-from brdavis@odin.ac.hmc.edu) Received: from odin.ac.hmc.edu (localhost.localdomain [127.0.0.1]) by odin.ac.hmc.edu (8.13.0/8.13.0) with ESMTP id i82HNkSH020920; Thu, 2 Sep 2004 10:23:46 -0700 Received: (from brdavis@localhost) by odin.ac.hmc.edu (8.13.0/8.13.0/Submit) id i82HNjrL020919; Thu, 2 Sep 2004 10:23:45 -0700 Date: Thu, 2 Sep 2004 10:23:45 -0700 From: Brooks Davis To: "M. Warner Losh" Message-ID: <20040902172345.GB3801@odin.ac.hmc.edu> References: <20040901193445.GC12483@odin.ac.hmc.edu> <41364415.9040708@elischer.org> <20040902000637.GA4120@odin.ac.hmc.edu> <20040902.020500.26961549.imp@bsdimp.com> Mime-Version: 1.0 Content-Type: multipart/signed; micalg=pgp-sha1; protocol="application/pgp-signature"; boundary="98e8jtXdkpgskNou" Content-Disposition: inline In-Reply-To: <20040902.020500.26961549.imp@bsdimp.com> User-Agent: Mutt/1.4.1i X-Virus-Scanned: by amavisd-new X-Spam-Status: No, hits=0.0 required=8.0 tests=none autolearn=no version=2.63 X-Spam-Checker-Version: SpamAssassin 2.63 (2004-01-11) on odin.ac.hmc.edu cc: arch@freebsd.org cc: scottl@freebsd.org cc: julian@elischer.org cc: julian@freebsd.FreeBSD.ORG Subject: Re: if_data size issues X-BeenThere: freebsd-arch@freebsd.org X-Mailman-Version: 2.1.1 Precedence: list List-Id: Discussion related to FreeBSD architecture List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Thu, 02 Sep 2004 17:23:16 -0000 --98e8jtXdkpgskNou Content-Type: text/plain; charset=us-ascii Content-Disposition: inline Content-Transfer-Encoding: quoted-printable On Thu, Sep 02, 2004 at 02:05:00AM -0600, M. Warner Losh wrote: > In message: <20040902000637.GA4120@odin.ac.hmc.edu> > Brooks Davis writes: > : - After 5.3 is released, declare that upgrades to 6.0 from releases > : other then 4.x (x>=3D11) and 5.y (y>=3D3) require special handling a= nd > : allow if_data to grow as demand requires. >=20 > There have long been plans to remove support to upgrade to 6.0 from > 4.x, and I plan on moving forward with those plans after the 5.3 > branch. There are a large number of hacks in place to allow upgrading > all the way back to the 4.0 branch point, and these hacks have been > the source of a lot of frustration and gnashing of teeth over the > years. By right of conquest (eg writing the legacy library and > working with both sides of this issue for litterally years), and by > general consensus of the folks that do the grunt work to make it > possible to upgrade, I think that desupporting upgrade to 6.0 from > anything less than 5.2 (or maybe 5.1 for a time) is a reasonable path > to follow. Given that the rest of the build system support for > upgrades will be limited, I'm not sure the benefit of supporting the > upgrade from 4.11 to 6. We never really supported upgrading from > 3.5.1 to 5.0-Release, for example. Note that a change of the size of struct if_data doesn't totally break ugprades from old versions, it just requires a bit of pre-planning if your upgrade process requires ifconfig or if you need the ability to roll back. -- Brooks --=20 Any statement of the form "X is the one, true Y" is FALSE. PGP fingerprint 655D 519C 26A7 82E7 2529 9BF0 5D8E 8BE9 F238 1AD4 --98e8jtXdkpgskNou Content-Type: application/pgp-signature Content-Disposition: inline -----BEGIN PGP SIGNATURE----- Version: GnuPG v1.2.1 (GNU/Linux) iD8DBQFBN1cgXY6L6fI4GtQRAnhZAJ9L+GVTBZ+6cPVQW5zdONmIaVQYzQCfXV7b tsZGHfaaev3iVN/bwbDNGSU= =PFLS -----END PGP SIGNATURE----- --98e8jtXdkpgskNou--