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[23.128.96.37]) by mx.google.com with ESMTPS id l187-20020a25ccc4000000b00d9ae4be45adsi2777370ybf.393.2023.10.27.07.42.52 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Fri, 27 Oct 2023 07:43:00 -0700 (PDT) Received-SPF: pass (google.com: domain of linux-kernel-owner@vger.kernel.org designates 23.128.96.37 as permitted sender) client-ip=23.128.96.37; Authentication-Results: mx.google.com; dkim=pass header.i=@kernel.org header.s=k20201202 header.b=mywJLKmT; spf=pass (google.com: domain of linux-kernel-owner@vger.kernel.org designates 23.128.96.37 as permitted sender) smtp.mailfrom=linux-kernel-owner@vger.kernel.org; dmarc=pass (p=NONE sp=NONE dis=NONE) header.from=kernel.org Received: from out1.vger.email (depot.vger.email [IPv6:2620:137:e000::3:0]) by snail.vger.email (Postfix) with ESMTP id 0711A804E81F; Fri, 27 Oct 2023 07:41:08 -0700 (PDT) X-Virus-Status: Clean X-Virus-Scanned: clamav-milter 0.103.10 at snail.vger.email Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1345772AbjJ0OlE (ORCPT + 25 others); Fri, 27 Oct 2023 10:41:04 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:51456 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S231627AbjJ0OlD (ORCPT ); Fri, 27 Oct 2023 10:41:03 -0400 Received: from smtp.kernel.org (relay.kernel.org [52.25.139.140]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 90883C4; Fri, 27 Oct 2023 07:41:00 -0700 (PDT) Received: by smtp.kernel.org (Postfix) with ESMTPSA id 5322DC433BB; Fri, 27 Oct 2023 14:40:57 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1698417660; bh=2vJeqFrics6fc78kHY5YdWmhThNCY0QoEBQ/4MZcNew=; h=From:To:Cc:Subject:Date:From; b=mywJLKmT3DdKLlNO9j9rzeGAwa0y142m4eFgcv5wonr70a4Y9SHDzaZDaLM+N1MLc wWr0Tn9nxV/shiabf1M/DOhjlwjXiGPYVywXa9OekjiseeK5kqBt26PDdMxq5HLBcb e9CnVnIsqUmxskNL/4y/4VhxiJScWvR+L47mEuiRLF0jo6CQMsJF5tN1d1G+jB09Nq u9iTTooTtKeg/n6wrthw8OnksTRT4L8JpoM0TIZQa/8jLS/TNfoNc3KJW8pGdl7l4z hIJoSquufh9WqXxiiV2/hu2sKzwfNQBC4IfH83O14RkL3l2M59KFPtaX44nTrMGfx8 RXb8aq4hGxJOw== From: Frederic Weisbecker To: LKML Cc: Frederic Weisbecker , Steven Rostedt , rcu , Uladzislau Rezki , Neeraj Upadhyay , Mathieu Desnoyers , Boqun Feng , "Paul E . McKenney" , Joel Fernandes , Josh Triplett , Zqiang , "Liam R . Howlett" , Peter Zijlstra Subject: [PATCH 0/4] rcu: Fix PF_IDLE related issues v3 Date: Fri, 27 Oct 2023 16:40:46 +0200 Message-Id: <20231027144050.110601-1-frederic@kernel.org> X-Mailer: git-send-email 2.34.1 MIME-Version: 1.0 X-Spam-Status: No, score=-2.1 required=5.0 tests=BAYES_00,DKIMWL_WL_HIGH, DKIM_SIGNED,DKIM_VALID,DKIM_VALID_AU,DKIM_VALID_EF, RCVD_IN_DNSWL_BLOCKED,SPF_HELO_NONE,SPF_PASS autolearn=ham autolearn_force=no version=3.4.6 X-Spam-Checker-Version: SpamAssassin 3.4.6 (2021-04-09) on lindbergh.monkeyblade.net Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org X-Greylist: Sender passed SPF test, not delayed by milter-greylist-4.6.4 (snail.vger.email [0.0.0.0]); Fri, 27 Oct 2023 07:41:08 -0700 (PDT) X-getmail-retrieved-from-mailbox: INBOX X-GMAIL-THRID: 1780920122733936172 X-GMAIL-MSGID: 1780920122733936172 Hi, The modification of PF_IDLE semantics lately to fix a bug in rcutiny eventually introduced new bugs in RCU-tasks. This v3 carries the following changes: * Use per_cpu_ptr() to correctly handle the remote CPU on [1/4] (Thanks Zqiang) * Test is_idle_task() even for non-idle task (idle injection) [2/4] (Thanks Peterz) * No need to use WRITE_ONCE() / READ_ONCE() on PF_IDLE modification [4/4] (Thanks Peterz) git://git.kernel.org/pub/scm/linux/kernel/git/frederic/linux-dynticks.git rcu/tasks-dev HEAD: afb666ef0fcde0b2ec30b007b0b30e5622ea30f0 Thanks, Frederic Acked-by: Peter Zijlstra (Intel) --- Frederic Weisbecker (4): rcu: Introduce rcu_cpu_online() rcu/tasks: Handle new PF_IDLE semantics rcu/tasks-trace: Handle new PF_IDLE semantics sched: Exclude CPU boot code from PF_IDLE area kernel/cpu.c | 4 ++++ kernel/rcu/rcu.h | 2 ++ kernel/rcu/tasks.h | 32 +++++++++++++++++++++++++++++--- kernel/rcu/tree.c | 7 +++++++ kernel/sched/idle.c | 1 - 5 files changed, 42 insertions(+), 4 deletions(-)