From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from casper.infradead.org (casper.infradead.org [90.155.50.34]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id ADDAD250BF6; Fri, 21 Feb 2025 19:57:24 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=90.155.50.34 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1740167846; cv=none; b=ty0tXuFg8kf0ip1zHY0XZjjr5qHIIG1pkHZ2sMJxNsY8mDcael7GuVG8x/KLMmuZiCb5vrHPxqVHIsW4xEdUJ8a17ZO/UL6hmeXkFhAlzci3xc07n2dZ4TD9+pxtrgegnBCQBOEcAIFayj8vuaRLXyfGRCOnztxYYcJtANxMlnU= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1740167846; c=relaxed/simple; bh=hL9ZIhAp39JgGtPt+XHHRB4UdgOeBbU7cs9PT+4BMkc=; h=Date:From:To:Cc:Subject:Message-ID:References:MIME-Version: Content-Type:Content-Disposition:In-Reply-To; b=NZ9b0BW8HHbpMplSPkg/6m0J266Rzi402REaSwOcuJO2aRx/E41CmJITPEhMpc8THXM3GN5X0mRBh5PgjMkAMQl9ilh/XQ+FR99Hh2tv3LzDzq3RZNnL8TzYhI7dsVwK/H486GlQYZHeze+I/BfDT/3BLb2gDDQ5J9B2ahVIo4Q= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dmarc=none (p=none dis=none) header.from=infradead.org; spf=none smtp.mailfrom=infradead.org; dkim=pass (2048-bit key) header.d=infradead.org header.i=@infradead.org header.b=SWBFReg0; arc=none smtp.client-ip=90.155.50.34 Authentication-Results: smtp.subspace.kernel.org; dmarc=none (p=none dis=none) header.from=infradead.org Authentication-Results: smtp.subspace.kernel.org; spf=none smtp.mailfrom=infradead.org Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=infradead.org header.i=@infradead.org header.b="SWBFReg0" DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=infradead.org; s=casper.20170209; h=In-Reply-To:Content-Type:MIME-Version: References:Message-ID:Subject:Cc:To:From:Date:Sender:Reply-To: Content-Transfer-Encoding:Content-ID:Content-Description; bh=hL9ZIhAp39JgGtPt+XHHRB4UdgOeBbU7cs9PT+4BMkc=; b=SWBFReg0sTydDxWqutWzxPGrwu NCNVu3eNqj4Wt32yqzHXNXYFq/dyOvrIqMmx44qGbwLyeQjR2PiHTvWcoK78xp3M3gO4sngFAoY4b bhz8pezCZQ/FJZVr1Dfyv0Xqz0aUAEFM8f1T4xTF59hDfzdDFRBQR4XOHEM4NJWYhAM1JlKpM+jkY /LyjZAzTtQ5xy+u8UuzTbqQNAvW3R457uwsDz8neQExG1oIzKAwOTTeUjOQYj40xQkX4o4qm6iUKv k6N9ywqwLf4oA5kqSN0cGZdINzvC1l3Kh+v38htfNQKSGlOPsClxI4Xm6LW1YBxkMj0bnuzJq/k67 MbwoCBXw==; Received: from 77-249-17-252.cable.dynamic.v4.ziggo.nl ([77.249.17.252] helo=noisy.programming.kicks-ass.net) by casper.infradead.org with esmtpsa (Exim 4.98 #2 (Red Hat Linux)) id 1tlZ96-0000000Ew9O-2QH2; Fri, 21 Feb 2025 19:57:12 +0000 Received: by noisy.programming.kicks-ass.net (Postfix, from userid 1000) id C10D730066A; Fri, 21 Feb 2025 20:57:11 +0100 (CET) Date: Fri, 21 Feb 2025 20:57:11 +0100 From: Peter Zijlstra To: Marco Elver Cc: "Paul E. McKenney" , Alexander Potapenko , Bart Van Assche , Bill Wendling , Boqun Feng , Dmitry Vyukov , Frederic Weisbecker , Greg Kroah-Hartman , Ingo Molnar , Jann Horn , Joel Fernandes , Jonathan Corbet , Josh Triplett , Justin Stitt , Kees Cook , Mark Rutland , Mathieu Desnoyers , Miguel Ojeda , Nathan Chancellor , Neeraj Upadhyay , Nick Desaulniers , Steven Rostedt , Thomas Gleixner , Uladzislau Rezki , Waiman Long , Will Deacon , kasan-dev@googlegroups.com, linux-kernel@vger.kernel.org, llvm@lists.linux.dev, rcu@vger.kernel.org, linux-crypto@vger.kernel.org Subject: Re: [PATCH RFC 15/24] rcu: Support Clang's capability analysis Message-ID: <20250221195711.GG7373@noisy.programming.kicks-ass.net> References: <20250206181711.1902989-16-elver@google.com> <3f255ebb-80ca-4073-9d15-fa814d0d7528@paulmck-laptop> <772d8ec7-e743-4ea8-8d62-6acd80bdbc20@paulmck-laptop> <20250221185220.GA7373@noisy.programming.kicks-ass.net> Precedence: bulk X-Mailing-List: linux-crypto@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: On Fri, Feb 21, 2025 at 08:46:45PM +0100, Marco Elver wrote: > Anything else you see as urgent? Re-entrant locks support a deal breaker? Most actual locks are not recursive -- RCU being the big exception here. As to this being deal breakers, I don't think so. We should just start with the bits we can do and chip away at stuff. Raise the LLVM version requirement every time new stuff gets added.