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 36609C433EF for ; Mon, 14 Mar 2022 13:38:10 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S241894AbiCNNjR (ORCPT ); Mon, 14 Mar 2022 09:39:17 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:33076 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S241387AbiCNNjG (ORCPT ); Mon, 14 Mar 2022 09:39:06 -0400 Received: from dfw.source.kernel.org (dfw.source.kernel.org [139.178.84.217]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 3FD152AFD for ; Mon, 14 Mar 2022 06:37:54 -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 D65F261188 for ; Mon, 14 Mar 2022 13:37:53 +0000 (UTC) Received: by smtp.kernel.org (Postfix) with ESMTPSA id 364F2C340EC; Mon, 14 Mar 2022 13:37:51 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1647265073; bh=Xewr86FT1fxMXD/lR5Uk6hSR4R6PnTnxz6+DRYq4q9Q=; h=From:To:Cc:Subject:Date:From; b=DztILwG16Y+xQGFHYcMh6Dd47J05+4UC61DIPOHiT+8V/xB0cVScURQGIXu5qxhe7 beOMtD160iKkmUG7T3mGHWCCqkommUH7y6zRdL1GpvcUMt6SlZT6cnjmTZjHB2Zdc4 Or1sgZKCxDVQuL0qC2HtPUwOZLu+ymfmN7lrXtnrPjdKqmEGtgHiHNCL6XqBGchDhM PZtd+x7cypyW/o4rgjF0apr1A8KO5L70R+Ytbpg7ydc/wUIqCkQ90Boahl9QM8E0el Z8L9SKrEWLf5HB3o6JGA3/F4anDXtf+fHf8HyEYSuuoaiyTnhOtN791aJNOe3IprkO nE/rL8zJl0sCQ== From: Frederic Weisbecker To: "Paul E . McKenney" Cc: LKML , Frederic Weisbecker , Peter Zijlstra , Marco Elver , Neeraj Upadhyay , Valentin Schneider , Boqun Feng , Uladzislau Rezki , Joel Fernandes Subject: [PATCH 0/3] rcu: synchronize_rcu[_expedited]() related fixes Date: Mon, 14 Mar 2022 14:37:35 +0100 Message-Id: <20220314133738.269522-1-frederic@kernel.org> X-Mailer: git-send-email 2.25.1 MIME-Version: 1.0 Content-Transfer-Encoding: 8bit Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org A few fixes especially for expedited GP polling causing a stall on TREE07, as reported by Paul. We may still want to optimize start_poll_synchronize_rcu_expedited() on UP-no-preempt but I think Paul may be implying this while doing other fixes. git://git.kernel.org/pub/scm/linux/kernel/git/frederic/linux-dynticks.git rcu/dev HEAD: 6e5fd7e614fd5c8f0fffeaa140b7ea697bfeb096 Thanks, Frederic --- Frederic Weisbecker (2): rcu: Fix expedited GP polling against UP/no-preempt environment rcu: Fix preemption mode check on synchronize_rcu[_expedited]() Valentin Schneider (1): preempt/dynamic: Introduce preempt mode accessors include/linux/sched.h | 16 +++++++++++++++ kernel/rcu/tree.c | 2 +- kernel/rcu/tree_exp.h | 57 +++++++++++++++++++++++++++++++-------------------- kernel/sched/core.c | 11 ++++++++++ 4 files changed, 63 insertions(+), 23 deletions(-)