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=-11.8 required=3.0 tests=HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_PATCH,MAILING_LIST_MULTI, MENTIONS_GIT_HOSTING,SIGNED_OFF_BY,SPF_HELO_NONE,SPF_PASS 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 DB903C2D0DB for ; Sat, 25 Jan 2020 10:45:49 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id B907524125 for ; Sat, 25 Jan 2020 10:45:49 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1729410AbgAYKps (ORCPT ); Sat, 25 Jan 2020 05:45:48 -0500 Received: from Galois.linutronix.de ([193.142.43.55]:44251 "EHLO Galois.linutronix.de" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1729486AbgAYKnG (ORCPT ); Sat, 25 Jan 2020 05:43:06 -0500 Received: from [5.158.153.53] (helo=tip-bot2.lab.linutronix.de) by Galois.linutronix.de with esmtpsa (TLS1.2:DHE_RSA_AES_256_CBC_SHA256:256) (Exim 4.80) (envelope-from ) id 1ivIu7-00007L-W4; Sat, 25 Jan 2020 11:43:04 +0100 Received: from [127.0.1.1] (localhost [IPv6:::1]) by tip-bot2.lab.linutronix.de (Postfix) with ESMTP id A5A2A1C1A88; Sat, 25 Jan 2020 11:42:51 +0100 (CET) Date: Sat, 25 Jan 2020 10:42:51 -0000 From: "tip-bot2 for Paul E. McKenney" Reply-to: linux-kernel@vger.kernel.org To: linux-tip-commits@vger.kernel.org Subject: [tip: core/rcu] rcutorture: Dynamically allocate rcu_fwds structure Cc: "Paul E. McKenney" , x86 , LKML MIME-Version: 1.0 Message-ID: <157994897148.396.4031348139577445630.tip-bot2@tip-bot2> X-Mailer: tip-git-log-daemon Robot-ID: Robot-Unsubscribe: Contact to get blacklisted from these emails Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: 7bit X-Linutronix-Spam-Score: -1.0 X-Linutronix-Spam-Level: - X-Linutronix-Spam-Status: No , -1.0 points, 5.0 required, ALL_TRUSTED=-1,SHORTCIRCUIT=-0.0001 Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org The following commit has been merged into the core/rcu branch of tip: Commit-ID: 5155be9994e557618a8312389fb4e52dfbf28a3c Gitweb: https://git.kernel.org/tip/5155be9994e557618a8312389fb4e52dfbf28a3c Author: Paul E. McKenney AuthorDate: Wed, 06 Nov 2019 08:35:08 -08:00 Committer: Paul E. McKenney CommitterDate: Mon, 09 Dec 2019 13:00:29 -08:00 rcutorture: Dynamically allocate rcu_fwds structure This commit switches from static structure to dynamic allocation for rcu_fwds as another step towards providing multiple call_rcu() forward-progress kthreads. Signed-off-by: Paul E. McKenney --- kernel/rcu/rcutorture.c | 13 ++++++++----- 1 file changed, 8 insertions(+), 5 deletions(-) diff --git a/kernel/rcu/rcutorture.c b/kernel/rcu/rcutorture.c index 394baac..f77f4d8 100644 --- a/kernel/rcu/rcutorture.c +++ b/kernel/rcu/rcutorture.c @@ -1686,7 +1686,7 @@ struct rcu_fwd { unsigned long rcu_launder_gp_seq_start; }; -struct rcu_fwd rcu_fwds; +struct rcu_fwd *rcu_fwds; bool rcu_fwd_emergency_stop; static void rcu_torture_fwd_cb_hist(struct rcu_fwd *rfp) @@ -1952,7 +1952,7 @@ static void rcu_torture_fwd_prog_cr(struct rcu_fwd *rfp) static int rcutorture_oom_notify(struct notifier_block *self, unsigned long notused, void *nfreed) { - struct rcu_fwd *rfp = &rcu_fwds; + struct rcu_fwd *rfp = rcu_fwds; WARN(1, "%s invoked upon OOM during forward-progress testing.\n", __func__); @@ -2010,7 +2010,7 @@ static int rcu_torture_fwd_prog(void *args) /* If forward-progress checking is requested and feasible, spawn the thread. */ static int __init rcu_torture_fwd_prog_init(void) { - struct rcu_fwd *rfp = &rcu_fwds; + struct rcu_fwd *rfp; if (!fwd_progress) return 0; /* Not requested, so don't do it. */ @@ -2026,12 +2026,15 @@ static int __init rcu_torture_fwd_prog_init(void) WARN_ON(1); /* Make sure rcutorture notices conflict. */ return 0; } - spin_lock_init(&rfp->rcu_fwd_lock); - rfp->rcu_fwd_cb_tail = &rfp->rcu_fwd_cb_head; if (fwd_progress_holdoff <= 0) fwd_progress_holdoff = 1; if (fwd_progress_div <= 0) fwd_progress_div = 4; + rfp = kzalloc(sizeof(*rfp), GFP_KERNEL); + if (!rfp) + return -ENOMEM; + spin_lock_init(&rfp->rcu_fwd_lock); + rfp->rcu_fwd_cb_tail = &rfp->rcu_fwd_cb_head; return torture_create_kthread(rcu_torture_fwd_prog, rfp, fwd_prog_task); }