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 X-Spam-Level: X-Spam-Status: No, score=-12.5 required=3.0 tests=BAYES_00,DKIMWL_WL_HIGH, DKIM_SIGNED,DKIM_VALID,DKIM_VALID_AU,INCLUDES_PATCH,MAILING_LIST_MULTI, SPF_HELO_NONE,SPF_PASS autolearn=unavailable autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id 879AEC6377C for ; Wed, 21 Jul 2021 20:20:45 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 733C961244 for ; Wed, 21 Jul 2021 20:20:45 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S235858AbhGUTkI (ORCPT ); Wed, 21 Jul 2021 15:40:08 -0400 Received: from mail.kernel.org ([198.145.29.99]:49528 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S229751AbhGUTkG (ORCPT ); Wed, 21 Jul 2021 15:40:06 -0400 Received: by mail.kernel.org (Postfix) with ESMTPSA id C703161241; Wed, 21 Jul 2021 20:20:42 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1626898842; bh=3ZwnJC2bCANAQgpR4BBA8w9DHAKAugVN42u+uvp+bzs=; h=Date:From:To:Cc:Subject:Reply-To:From; b=PMCSb840lHp7D8bZp/vCyUeGZHHbFwU1cXzqw9sr9yIK05SNXNhUJPec34ojv8URE bFXkkgsbP77RJgENBzxHiI81+CXn8QlEpFAqrRer7EVRrkwH6bXE+P2ga/CkWToTdQ RW6AKI8EHDTpYdmy63WMVfoMxI8aQMV2fdlkvam2tZm/9VeM8x22iFRAzF7nINzQ8e 3pruwKCyUJ7o/QcYoqqCJhaWBZTusSDOvWJB8zcWjcnxPxOqbama2dfK5bsUUheJRk QqPg8ymTqxOfpgld7LAACr7K4EELSdCGq/YraIadlqXSX7meqazS8Vfpc8O6KVjkjS ILKDuftl7RDyA== Received: by paulmck-ThinkPad-P17-Gen-1.home (Postfix, from userid 1000) id 8649D5C09A4; Wed, 21 Jul 2021 13:20:42 -0700 (PDT) Date: Wed, 21 Jul 2021 13:20:42 -0700 From: "Paul E. McKenney" To: rcu@vger.kernel.org Cc: linux-kernel@vger.kernel.org, kernel-team@fb.com, mingo@kernel.org, jiangshanlai@gmail.com, akpm@linux-foundation.org, mathieu.desnoyers@efficios.com, josh@joshtriplett.org, tglx@linutronix.de, peterz@infradead.org, rostedt@goodmis.org, dhowells@redhat.com, edumazet@google.com, fweisbec@gmail.com, oleg@redhat.com, joel@joelfernandes.org Subject: [PATCH rcu 0/18] Miscellaneous fixes for v5.15 Message-ID: <20210721202042.GA1472052@paulmck-ThinkPad-P17-Gen-1> Reply-To: paulmck@kernel.org MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Hello! This series provides miscellaneous fixes: 1. Fix to include first blocked task in stall warning, courtesy of Yanfei Xu. 2. Fix stall-warning deadlock due to non-release of rcu_node ->lock, courtesy of Yanfei Xu. 3. Remove special bit at the bottom of the ->dynticks counter, courtesy of "Joel Fernandes (Google)". 4. Weaken ->dynticks accesses and updates. 5. Mark accesses to ->rcu_read_lock_nesting. 6. Unify documentation about missing list_empty_rcu(), courtesy of Julian Wiedmann. 7. Handle VM stoppage in stall detection, courtesy of Sergey Senozhatsky. 8. Do not disable GP stall detection in rcu_cpu_stall_reset(), courtesy of Sergey Senozhatsky. 9. Start timing stall repetitions after warning complete. 10. Mark read-side data races. 11. Mark lockless ->qsmask read in rcu_check_boost_fail(). 12. Make rcu_gp_init() and rcu_gp_fqs_loop noinline to conserve stack. 13. Remove trailing spaces and tabs, courtesy of Zhen Lei. 14. Mark accesses in tree_stall.h. 15. Remove useless "ret" update in rcu_gp_fqs_loop(), courtesy of Liu Song. 16. Use per_cpu_ptr to get the pointer of per_cpu variable, courtesy of Liu Song. 17. Explain why rcu_all_qs() is a stub in preemptible TREE RCU, courtesy of Frederic Weisbecker. 18. Print human-readable message for schedule() in RCU reader. Thanx, Paul ------------------------------------------------------------------------ b/include/linux/rculist.h | 35 +++++++------- b/include/linux/rcupdate.h | 2 b/include/linux/rcutiny.h | 3 - b/include/linux/srcutiny.h | 8 +-- b/kernel/rcu/srcutiny.c | 2 b/kernel/rcu/tasks.h | 2 b/kernel/rcu/tree.c | 77 +++++--------------------------- b/kernel/rcu/tree.h | 2 b/kernel/rcu/tree_plugin.h | 9 ++- b/kernel/rcu/tree_stall.h | 4 - b/kernel/sched/core.c | 11 ++++ kernel/rcu/tree.c | 62 ++++++++++++++++---------- kernel/rcu/tree_plugin.h | 2 kernel/rcu/tree_stall.h | 107 ++++++++++++++++++++++++++++----------------- 14 files changed, 165 insertions(+), 161 deletions(-)