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=unavailable 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 8FE16C433DF for ; Tue, 23 Jun 2020 00:38:21 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 6862920738 for ; Tue, 23 Jun 2020 00:38:21 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1592872701; bh=/Q26VqU3580OaRfSBl2rt+MzXRjW79zb8l2uahSHUUU=; h=From:To:Cc:Subject:Date:In-Reply-To:References:List-ID:From; b=uAk0CbiUd4JuN356FjyVGUiSXnJKBqhcWuZHMo0zA12trYcnLuxL2S/+WbmH7vNZh xHljjAJnWT+jzO5YHDYlzDJqNh9goF5O7m7m+J9E4frSsCJxI4rTAH4+ms72RmRgKX eoNHBmng9R3yOtF6JaajrsMoy5kSCPiHgzoxNdwk= Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1732172AbgFWAh6 (ORCPT ); Mon, 22 Jun 2020 20:37:58 -0400 Received: from mail.kernel.org ([198.145.29.99]:33820 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1732151AbgFWAh5 (ORCPT ); Mon, 22 Jun 2020 20:37:57 -0400 Received: from paulmck-ThinkPad-P72.home (50-39-105-78.bvtn.or.frontiernet.net [50.39.105.78]) (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 BABCA208D5; Tue, 23 Jun 2020 00:37:56 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1592872676; bh=/Q26VqU3580OaRfSBl2rt+MzXRjW79zb8l2uahSHUUU=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=YXP5QBaekfO4eV1jqMW3efbjJVIt9lQmNvLSb8SV5RCYOD3vU0M4BPmQ1NYgJmbE1 CrEEEyrX0N4CJrbHo/13M8zX4pzPM50OA2+Mu//fNbSys9tSy71qTjt5CSrQjuypVv IRbsHiFWDwUitzHG7Ei/vL6x409pwfq/Un0YnUsI= 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 14/23] rcutorture: Check for unwatched readers Date: Mon, 22 Jun 2020 17:37:43 -0700 Message-Id: <20200623003752.26872-14-paulmck@kernel.org> X-Mailer: git-send-email 2.9.5 In-Reply-To: <20200623003731.GA26717@paulmck-ThinkPad-P72> References: <20200623003731.GA26717@paulmck-ThinkPad-P72> Sender: rcu-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: rcu@vger.kernel.org From: "Paul E. McKenney" RCU is supposed to be watching all non-idle kernel code and also all softirq handlers. This commit adds some teeth to this statement by adding a WARN_ON_ONCE(). Signed-off-by: Paul E. McKenney --- kernel/rcu/rcutorture.c | 1 + 1 file changed, 1 insertion(+) diff --git a/kernel/rcu/rcutorture.c b/kernel/rcu/rcutorture.c index 37455a1..9c31001 100644 --- a/kernel/rcu/rcutorture.c +++ b/kernel/rcu/rcutorture.c @@ -1377,6 +1377,7 @@ static bool rcu_torture_one_read(struct torture_random_state *trsp) struct rt_read_seg *rtrsp1; unsigned long long ts; + WARN_ON_ONCE(!rcu_is_watching()); newstate = rcutorture_extend_mask(readstate, trsp); rcutorture_one_extend(&readstate, newstate, trsp, rtrsp++); started = cur_ops->get_gp_seq(); -- 2.9.5