From owner-freebsd-current@FreeBSD.ORG Tue Apr 10 09:11:54 2007 Return-Path: X-Original-To: freebsd-current@freebsd.org Delivered-To: freebsd-current@freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [69.147.83.52]) by hub.freebsd.org (Postfix) with ESMTP id 959CB16A400; Tue, 10 Apr 2007 09:11:54 +0000 (UTC) (envelope-from ivoras@fer.hr) Received: from pinus.cc.fer.hr (pinus.cc.fer.hr [161.53.73.18]) by mx1.freebsd.org (Postfix) with ESMTP id 352FC13C4BB; Tue, 10 Apr 2007 09:11:53 +0000 (UTC) (envelope-from ivoras@fer.hr) Received: from [161.53.72.113] (lara.cc.fer.hr [161.53.72.113]) by pinus.cc.fer.hr (8.12.2/8.12.2) with ESMTP id l3A9JwLT027089; Tue, 10 Apr 2007 11:19:58 +0200 (MEST) Message-ID: <461B54B6.60404@fer.hr> Date: Tue, 10 Apr 2007 11:11:18 +0200 From: Ivan Voras User-Agent: Thunderbird 1.5.0.10 (X11/20060911) MIME-Version: 1.0 Newsgroups: gmane.os.freebsd.current, gmane.os.freebsd.devel.file-systems, gmane.os.solaris.opensolaris.zfs To: Wilko Bulte References: <20070406025700.GB98545@garage.freebsd.pl> <46177881.3090509@wcborstel.com> <20070407141736.GC4058@freebie.xs4all.nl> In-Reply-To: <20070407141736.GC4058@freebie.xs4all.nl> X-Enigmail-Version: 0.94.2.0 Content-Type: multipart/signed; micalg=pgp-sha1; protocol="application/pgp-signature"; boundary="------------enig91D3EF91FDFA3344064F76AE" Cc: freebsd-fs@freebsd.org, zfs-discuss@opensolaris.org, Jorn Argelo , Pawel Jakub Dawidek , freebsd-current@freebsd.org Subject: Re: [zfs-discuss] ZFS committed to the FreeBSD base. X-BeenThere: freebsd-current@freebsd.org X-Mailman-Version: 2.1.5 Precedence: list List-Id: Discussions about the use of FreeBSD-current List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Tue, 10 Apr 2007 09:11:54 -0000 This is an OpenPGP/MIME signed message (RFC 2440 and 3156) --------------enig91D3EF91FDFA3344064F76AE Content-Type: text/plain; charset=UTF-8; format=flowed Content-Transfer-Encoding: quoted-printable Wilko Bulte wrote: > On Sat, Apr 07, 2007 at 12:54:57PM +0200, Jorn Argelo wrote.. >> Rich Teer wrote: >>> This is fantastic news! At the risk of raking over ye olde arguments= , >>> as the old saying goes: "Dual licensing? We don't need no stinkeen >>> dual licensing!". :-) >>> >>> =20 >> First of all, thanks a lot for all the hard work of both the FreeBSD=20 >> developers as the ZFS developers. I can't wait to give it a go. >> >> That leads me to one question though: Why is *BSD able to bring it int= o=20 >> the OS as where Linux has licensing problems with the CDDL? AFAIK Linu= x=20 >> users can only run it in userland mode and not in kernel mode because = of=20 >> the licenses. >=20 > My guess(!) is that they do not want non-GPL-ed code in the standard ke= rnel. Sorry if I'm reiterating what someone maybe already explained, but I=20 don't see it on the lists I read: FreeBSD can include GPL'ed code due to a "technicality" (literally): As=20 long as the code is in a separate kernel module and not in the default=20 shipped GENERIC kernel, it's considered "bundled" and not a part of the=20 kernel. As soon as the user loads a GPLed kernel module, presto-changeo! = his kernel "automagically" becomes GPLed. I believe the same holds for=20 CDDL. (I have no idea how to resolve the licensing issues of a kernel=20 with both GPL and CDDL parts :) ). This is less inconvenient than it=20 seems since kernel modules can be (pre)loaded at the same time the=20 kernel loads, and so we can have a ZFS root partition, etc. The problem with DTrace in FreeBSD is twofold: 1. It's much more intertwined with the kernel. 2. Much of its usability comes from it being available in the default=20 shipped kernel - so that users can use it to troubleshoot problems "on=20 the fly" without having to recompile and install a new kernel (involves=20 rebooting). AFAIK (not involved with its development), most of dtrace can reside in=20 a kernel module but some parts need to be in the kernel proper to=20 support this mode of operation, and *this* is where the licensing comes=20 in. Just a few files (AFAIK: mostly header files!) need to be=20 dual-licensed so they can be included in the default kernel build, and=20 the rest can be in the CDDL licensed kernel module. --------------enig91D3EF91FDFA3344064F76AE Content-Type: application/pgp-signature; name="signature.asc" Content-Description: OpenPGP digital signature Content-Disposition: attachment; filename="signature.asc" -----BEGIN PGP SIGNATURE----- Version: GnuPG v1.4.5 (GNU/Linux) Comment: Using GnuPG with SUSE - http://enigmail.mozdev.org iD8DBQFGG1S8ldnAQVacBcgRAoNyAJ4mGKdfVa7EBCjxaq+vstSfN2YxoACeMAlM K2zXWIRJqR5gI/wRUzNTASs= =AeqS -----END PGP SIGNATURE----- --------------enig91D3EF91FDFA3344064F76AE--