From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id 61268C43334 for ; Wed, 20 Jul 2022 17:45:40 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S231207AbiGTRpi (ORCPT ); Wed, 20 Jul 2022 13:45:38 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:42938 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S230280AbiGTRph (ORCPT ); Wed, 20 Jul 2022 13:45:37 -0400 Received: from dfw.source.kernel.org (dfw.source.kernel.org [IPv6:2604:1380:4641:c500::1]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 7C2AC3244C; Wed, 20 Jul 2022 10:45:36 -0700 (PDT) Received: from smtp.kernel.org (relay.kernel.org [52.25.139.140]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by dfw.source.kernel.org (Postfix) with ESMTPS id 0829B6151C; Wed, 20 Jul 2022 17:45:36 +0000 (UTC) Received: by smtp.kernel.org (Postfix) with ESMTPSA id 48216C3411E; Wed, 20 Jul 2022 17:45:33 +0000 (UTC) Date: Wed, 20 Jul 2022 13:45:31 -0400 From: Steven Rostedt To: Daniel Bristot de Oliveira Cc: Wim Van Sebroeck , Guenter Roeck , Jonathan Corbet , Ingo Molnar , Thomas Gleixner , Peter Zijlstra , Will Deacon , Catalin Marinas , Marco Elver , Dmitry Vyukov , "Paul E. McKenney" , Shuah Khan , Gabriele Paoloni , Juri Lelli , Clark Williams , Tao Zhou , Randy Dunlap , linux-doc@vger.kernel.org, linux-kernel@vger.kernel.org, linux-trace-devel@vger.kernel.org Subject: Re: [PATCH V6 02/16] rv: Add runtime reactors interface Message-ID: <20220720134531.400b87af@gandalf.local.home> In-Reply-To: References: <4b5f93e3186b067073c1692d4c2b50d0b42101d5.1658244826.git.bristot@kernel.org> <20220720124133.3cdd2c44@gandalf.local.home> <20220720130209.65f501b1@gandalf.local.home> X-Mailer: Claws Mail 3.17.8 (GTK+ 2.24.33; x86_64-pc-linux-gnu) MIME-Version: 1.0 Content-Type: text/plain; charset=US-ASCII Content-Transfer-Encoding: 7bit Precedence: bulk List-ID: X-Mailing-List: linux-trace-devel@vger.kernel.org On Wed, 20 Jul 2022 19:37:58 +0200 Daniel Bristot de Oliveira wrote: > > That has logic that looks to require a lock to protect things from changing > > from underneath. > > ack, so the only variable I see we can use READ_ONCE/WRITE_ONCE is the reacting_on... WRITE_ONCE() does not supply memory barriers, which you may need. I'm only at patch 3, I'm not sure what the full requirements of that is. -- Steve