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([2607:fb90:8378:20a7:f9af:9b65:229f:93f7]) by smtp.gmail.com with ESMTPSA id a1sm14679529pfn.26.2019.02.20.10.32.46 (version=TLS1_2 cipher=ECDHE-RSA-AES128-GCM-SHA256 bits=128/128); Wed, 20 Feb 2019 10:32:46 -0800 (PST) Content-Type: text/plain; charset=utf-8 Mime-Version: 1.0 (1.0) Subject: Re: svn commit: r344316 - head/sys/cddl/contrib/opensolaris/uts/common/fs/zfs From: Enji Cooper X-Mailer: iPhone Mail (16D57) In-Reply-To: <201902201711.x1KHBeiQ016158@pdx.rh.CN85.dnsmgr.net> Date: Wed, 20 Feb 2019 10:32:45 -0800 Cc: Alexey Dokuchaev , Shawn Webb , Pawel Jakub Dawidek , svn-src-head@freebsd.org, svn-src-all@freebsd.org, src-committers@freebsd.org Content-Transfer-Encoding: quoted-printable Message-Id: <2E31FED5-0E0B-4624-AF11-2178C7E84308@gmail.com> References: <201902201711.x1KHBeiQ016158@pdx.rh.CN85.dnsmgr.net> To: rgrimes@freebsd.org X-Rspamd-Queue-Id: D9B3D8D083 X-Spamd-Bar: ------ Authentication-Results: mx1.freebsd.org X-Spamd-Result: default: False [-6.89 / 15.00]; NEURAL_HAM_MEDIUM(-1.00)[-0.999,0]; NEURAL_HAM_SHORT(-0.90)[-0.896,0]; REPLY(-4.00)[]; NEURAL_HAM_LONG(-1.00)[-1.000,0] X-BeenThere: svn-src-all@freebsd.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: "SVN commit messages for the entire src tree \(except for " user" and " projects" \)" List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Wed, 20 Feb 2019 18:32:49 -0000 On Feb 20, 2019, at 09:11, Rodney W. Grimes = wrote: > One can personally link ZoL into your own kernel, and a company/corporate > can even do this and run it on 1000's of servers, you just can not > distribute it to anyone else, which in the end is not really a big > deal, unless your in the Linux distribution business. Very little organizations roll their own Linux kernels in the grand scheme o= f things (run of the mill sysadmins aren=E2=80=99t hackers), and making Linu= x VFS work with ZFS is a nontrivial job (ZoL might work with a kernel versio= n, but it won=E2=80=99t work with all target kernel versions). Groups like Fa= cebook, Google, Oracle, etc, do it because they have the developer manpower a= nd it=E2=80=99s in their vested interest to run a custom kernel config/kerne= l with backports/enhancements. Plus, they don=E2=80=99t need to release thei= r changes, as their server platforms won=E2=80=99t be productized (thus skat= ing around the GPLv2). I couldn=E2=80=99t find gregkh@=E2=80=98s diatribe about Linux kernel compat= ibility, but it was basically (put nicely), =E2=80=9Cput your code in the ke= rnel tree, cause we won=E2=80=99t necessarily provide backwards compatibilit= y, as we need to break interfaces from time to time.=E2=80=9D Given that zfs is licensed under the CDDL (a viral license to Linux), that c= ode will never, ever, hit the mainline tree. This is one of the code reasons why, over time, btrfs has evolved into the f= ile system that it is: it fills a niche that ext4 couldn=E2=80=99t and zfs d= id, while being licensed under an acceptable kernel license (GPLv2). -Enji=