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=-10.1 required=3.0 tests=DKIMWL_WL_HIGH,DKIM_SIGNED, DKIM_VALID,DKIM_VALID_AU,INCLUDES_PATCH,MAILING_LIST_MULTI,SIGNED_OFF_BY, 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 1F449C43603 for ; Tue, 10 Dec 2019 03:42:50 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id E68F120828 for ; Tue, 10 Dec 2019 03:42:49 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1575949370; bh=N05EpPtOSrQbn7yOfFXBkRpyGIkc4d3k4nuvgRfYoEo=; h=From:To:Cc:Subject:Date:In-Reply-To:References:List-ID:From; b=qRaycaeMIAiRDVNzpATNNu7IDB2Lk1QvUq90Qf4vbTyivDDgD0iB/JPwveTS+h2lG 4OtE2tHYmwR5c8B9nVY5gmAUxHWsLEPMBhgJr3PaJ4o8saPU9KCCZgtOJJM9m4sP6L 32HDmJlWfr8/Yl01JUcpO9JS2Ontn7h4s80MaCdk= Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1727268AbfLJDmt (ORCPT ); Mon, 9 Dec 2019 22:42:49 -0500 Received: from mail.kernel.org ([198.145.29.99]:32772 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1727119AbfLJDm1 (ORCPT ); Mon, 9 Dec 2019 22:42:27 -0500 Received: from paulmck-ThinkPad-P72.home (199-192-87-166.static.wiline.com [199.192.87.166]) (using TLSv1.2 with cipher ECDHE-RSA-AES128-GCM-SHA256 (128/128 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPSA id 7D86324653; Tue, 10 Dec 2019 03:42:26 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1575949347; bh=N05EpPtOSrQbn7yOfFXBkRpyGIkc4d3k4nuvgRfYoEo=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=GYX5ME9vOZrQ+/TABwsJndz0ec0HVgdi5OlgvvD4dn5+r/fMYNfUj5jk7P+P9O+/W la4QMGcUaKxepqB/udVmOAI9EyxH5ILUYEBl9QgT8EXy6sUgM5HMmIli8V7GoE135+ QpF1M1TtPcv1YCxjh80Zj5ZSMZs2EyiMvXjoWZ0g= From: paulmck@kernel.org 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, "Paul E. McKenney" Subject: [PATCH tip/core/rcu 10/12] rcutorture: Dynamically allocate rcu_fwds structure Date: Mon, 9 Dec 2019 19:42:15 -0800 Message-Id: <20191210034217.405-10-paulmck@kernel.org> X-Mailer: git-send-email 2.9.5 In-Reply-To: <20191210034119.GA32711@paulmck-ThinkPad-P72> References: <20191210034119.GA32711@paulmck-ThinkPad-P72> Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org From: "Paul E. McKenney" 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); } -- 2.9.5