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Marchesi" , Beau Belgrave , Jens Remus , Linus Torvalds , Andrew Morton , tech-board-discuss@lists.linuxfoundation.org Subject: Re: [RFC PATCH 2/5] unwind: Export unwind_user symbol to GPL modules Message-ID: References: <20250709212556.32777-1-mathieu.desnoyers@efficios.com> <20250709212556.32777-3-mathieu.desnoyers@efficios.com> <20250711065742.00d6668b@gandalf.local.home> <20250714062724.6febd9fb@gandalf.local.home> <20250714075426.36bdda0b@gandalf.local.home> Precedence: bulk X-Mailing-List: tech-board-discuss@lists.linux.dev List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20250714075426.36bdda0b@gandalf.local.home> X-SRS-Rewrite: SMTP reverse-path rewritten from by bombadil.infradead.org. See http://www.infradead.org/rpr.html On Mon, Jul 14, 2025 at 07:54:26AM -0400, Steven Rostedt wrote: > On Mon, 14 Jul 2025 04:38:33 -0700 > Christoph Hellwig wrote: > > > On Mon, Jul 14, 2025 at 06:27:24AM -0400, Steven Rostedt wrote: > > > This has nothing to do with Mathieu being a friend. He's a long time Linux > > > kernel contributor and has played a key role in developing a new feature > > > that will help both perf and ftrace, but without the EXPORT_SYMBOL_GPL(), > > > LTTng can't use it. It's basically saying "thank you Mathieu for helping us > > > with this new feature, now go F*** off!" > > > > You don't have to be as explicit, but otherwise that's exactly how > > it works. No one gets a free ride just because they are nice and/or > > contributed something. > > Why is that? Why would it be any different? We have a clear reason both for technical reasons, and to get code upstream. Making exceptions for vaguely defined friends and family defeats the entire purpose. If you want to help Mathieu or others do that by putting your effort behind the cause instead of making up exceptions. > How would you recommend getting LTTng into the kernel? It's a relatively > large project that has 75K of lines of code with development that lasted > around 20 years. I honestly don't care. Not my business. And you're probably also asking the wrong question, as those giant old out of tree projects tend to be a mess because of that. The right question is really what functionality does LTTng have that we want in the kernel and work on that.