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=-19.0 required=3.0 tests=BAYES_00,DKIMWL_WL_HIGH, DKIM_SIGNED,DKIM_VALID,DKIM_VALID_AU,INCLUDES_PATCH,MAILING_LIST_MULTI, MENTIONS_GIT_HOSTING,SPF_HELO_NONE,SPF_PASS,USER_AGENT_GIT autolearn=ham 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 18891C433ED for ; Thu, 1 Apr 2021 23:47:18 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id CC03261107 for ; Thu, 1 Apr 2021 23:47:17 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S236058AbhDAXrQ (ORCPT ); Thu, 1 Apr 2021 19:47:16 -0400 Received: from mail.kernel.org ([198.145.29.99]:50782 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S233677AbhDAXrM (ORCPT ); Thu, 1 Apr 2021 19:47:12 -0400 Received: by mail.kernel.org (Postfix) with ESMTPSA id B4BC0601FB; Thu, 1 Apr 2021 23:47:10 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1617320832; bh=hQpws+350Uvap6ebEPGY4mqBornP8+cVYTRGADWkfyM=; h=From:To:Cc:Subject:Date:From; b=IpgwrqB0DfeelYwCgnoCS0JdZOJdgNzrWHekQLJpPmlkiUByWmzyEhZOaTgnjALKy S563f8F+flH3VJ5YokytzTL70FuzWcEqkWJYXYvxHUJFwwiYwPJzRSxxcao+aAEoiS NcpC0TMOVJ2wQC4jSamCs62qqa1pCC7r6Yw+pJoYstt+zkPQ/RtxEo0sbg2JzeBmXb WjUZCtDTjswUrSLAdZsKY/sKtrXBrdyyGkujUjavt77PveQCy3Yt7FbtRZoepN/uG9 9Y2Td2L4ADUbbSan+pf5fzhM++h1QKhhmD3/vtogYyTjf4zUAZNnrTVzEvIQAinNIZ 54DdifjQUUeoQ== From: Frederic Weisbecker To: "Paul E . McKenney" Cc: LKML , Frederic Weisbecker , Uladzislau Rezki , Boqun Feng , Lai Jiangshan , Neeraj Upadhyay , Josh Triplett , Joel Fernandes Subject: [PATCH 0/3] srcu: Fix boot stall Date: Fri, 2 Apr 2021 01:47:01 +0200 Message-Id: <20210401234704.125498-1-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 This is a fix for a boot stall that can be reproduced with "rcupdate.rcu_self_test=1" and CONFIG_PROVE_RCU=y. It should be easy to trigger if you set CONFIG_MAXSMP=y and you don't actually have thousands of CPUs. git://git.kernel.org/pub/scm/linux/kernel/git/frederic/linux-dynticks.git rcu/dev HEAD: 6390b2aa1295f79150fac8f5ff60177eea5d8f8b Thanks, Frederic --- Frederic Weisbecker (3): srcu: Remove superfluous ssp initialization on deferred work queue srcu: Remove superfluous sdp->srcu_lock_count zero filling srcu: Fix broken node geometry after early ssp init include/linux/srcutree.h | 1 + kernel/rcu/srcutree.c | 81 +++++++++++++++++++++++++++++++++++++----------- 2 files changed, 64 insertions(+), 18 deletions(-)