Date: Thu, 2 Sep 2004 10:23:45 -0700 From: Brooks Davis <brooks@one-eyed-alien.net> To: "M. Warner Losh" <imp@bsdimp.com> Cc: julian@freebsd.FreeBSD.ORG Subject: Re: if_data size issues Message-ID: <20040902172345.GB3801@odin.ac.hmc.edu> In-Reply-To: <20040902.020500.26961549.imp@bsdimp.com> References: <20040901193445.GC12483@odin.ac.hmc.edu> <41364415.9040708@elischer.org> <20040902000637.GA4120@odin.ac.hmc.edu> <20040902.020500.26961549.imp@bsdimp.com>
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--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 <brooks@one-eyed-alien.net> 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--
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