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=-2.6 required=3.0 tests=DKIMWL_WL_HIGH,DKIM_SIGNED, DKIM_VALID,DKIM_VALID_AU,MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS, USER_AGENT_SANE_1 autolearn=no 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 2A146C3F68F for ; Sat, 15 Feb 2020 00:18:20 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id EE1E52082F for ; Sat, 15 Feb 2020 00:18:19 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1581725900; bh=zBkIaXyCDkP0NHhzcS+nOpVULeLBaNTeUYV5b4mTysY=; h=Date:From:To:Cc:Subject:Reply-To:List-ID:From; b=TMShNjs9xnU6/qMJgyvRuh2hrsRFSAE3/WFDeQHWu2OUj2zjfgzJNjn2pdFPaH03t YVBf/LLDrnCcQTyqlvDSTd0QpzXrN6wRg2GfX22CkwmkJDxNJTEAiQY1jo9cyp36H/ RMp5CyKbMz7Skmrpl32Q5hMqwRI9xukgannA1FE8= Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1727798AbgBOAST (ORCPT ); Fri, 14 Feb 2020 19:18:19 -0500 Received: from mail.kernel.org ([198.145.29.99]:43044 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1726079AbgBOAST (ORCPT ); Fri, 14 Feb 2020 19:18:19 -0500 Received: from paulmck-ThinkPad-P72.home (unknown [62.84.152.189]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPSA id 58089207FF; Sat, 15 Feb 2020 00:18:18 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1581725898; bh=zBkIaXyCDkP0NHhzcS+nOpVULeLBaNTeUYV5b4mTysY=; h=Date:From:To:Cc:Subject:Reply-To:From; b=Ay7eKa0NhKknq7r8n5VMKeW8J10mV+eaVAPGJsR74nCIxhqxwkGOoLRjdDqyLp7vK VUZytnkm9+XtrNGeiZeVTvJ3xJwhp9+Nj8UeQBvuG3ZtQuBtGGzAnBRbtg6bmK9jy5 r9CX3wW7FHxub6psEs8uArKQ3bGe2Bu6btKhDCT0= Received: by paulmck-ThinkPad-P72.home (Postfix, from userid 1000) id B6B023520D46; Fri, 14 Feb 2020 16:18:16 -0800 (PST) Date: Fri, 14 Feb 2020 16:18:16 -0800 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, dipankar@in.ibm.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 tip/core/rcu 0/5] Callback-overload update for v5.7 Message-ID: <20200215001816.GA15284@paulmck-ThinkPad-P72> Reply-To: paulmck@kernel.org MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline User-Agent: Mutt/1.9.4 (2018-02-28) Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Hello! This series contains updates to handling of callback-overload condiitons. 1. Clear ->core_needs_qs at GP end or self-reported QS. 2. React to callback overload by aggressively seeking quiescent states. 3. React to callback overload by boosting RCU readers. 4. Fix spelling mistake "leval" -> "level". 5. Update __call_rcu() comments. Thanx, Paul ------------------------------------------------------------------------ Documentation/admin-guide/kernel-parameters.txt | 9 ++ kernel/rcu/tree.c | 97 ++++++++++++++++++++---- kernel/rcu/tree.h | 4 kernel/rcu/tree_plugin.h | 6 - 4 files changed, 99 insertions(+), 17 deletions(-)