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=-13.1 required=3.0 tests=BAYES_00,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 C41E2C433E7 for ; Mon, 31 Aug 2020 18:03:53 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 902FB20866 for ; Mon, 31 Aug 2020 18:03:53 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1598897033; bh=SqcLCzy/pd6sy2To5gbz8hyUj0ALD01FMFdhcisgvcs=; h=From:To:Cc:Subject:Date:In-Reply-To:References:List-ID:From; b=LS7v3864VdsJm1uOHyVMre2tkCCEMLFKt4HZlsDxoZ5aKIGhYmHeNtup7HRNTIBDE LPgg5QHWtqDIt5+DjUnds8CEZ3zVvr6qKwWUw6vGLQWJS1rk6pUvjHJuzYga+utLlY PAHDV8UDNwziAq4UPB2rOsnOmnprxecjVTkjR1oc= Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1729325AbgHaSDv (ORCPT ); Mon, 31 Aug 2020 14:03:51 -0400 Received: from mail.kernel.org ([198.145.29.99]:35820 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1728418AbgHaSBW (ORCPT ); Mon, 31 Aug 2020 14:01:22 -0400 Received: from paulmck-ThinkPad-P72.home (unknown [50.45.173.55]) (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 4CE2221532; Mon, 31 Aug 2020 18:01:21 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1598896881; bh=SqcLCzy/pd6sy2To5gbz8hyUj0ALD01FMFdhcisgvcs=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=uk/QvhUuTt7wLN4MziZldXUz4KVANAnVezdI/mU72BD1tEIGfLsc1E6sUqWJ0GiKE 9mtHejoFB1dj86UV6tFO91Ms+mcSDUn6B6dcUtOJkECoVuiAxMU7ugwb0A3GtlcN+x jXJ3mR5841Q45xUvATFQp3gxhwsE8qtSqlU+iQQk= 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 07/24] nocb: Clarify RCU nocb CPU error message Date: Mon, 31 Aug 2020 11:00:59 -0700 Message-Id: <20200831180116.32690-7-paulmck@kernel.org> X-Mailer: git-send-email 2.9.5 In-Reply-To: <20200831180050.GA32590@paulmck-ThinkPad-P72> References: <20200831180050.GA32590@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" A message of the form "rcu: !!! lDTs ." can be tracked down, but doing so is not trivial. This commit therefore eases this process by adding text so that this error message now reads as follows: "rcu: nocb GP activity on CB-only CPU!!! lDTs ." Signed-off-by: Paul E. McKenney --- kernel/rcu/tree_plugin.h | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/kernel/rcu/tree_plugin.h b/kernel/rcu/tree_plugin.h index 982fc5b..bbc0c07 100644 --- a/kernel/rcu/tree_plugin.h +++ b/kernel/rcu/tree_plugin.h @@ -2417,7 +2417,7 @@ static void show_rcu_nocb_state(struct rcu_data *rdp) !waslocked && !wastimer && !wassleep) return; /* Nothing untowards. */ - pr_info(" !!! %c%c%c%c %c\n", + pr_info(" nocb GP activity on CB-only CPU!!! %c%c%c%c %c\n", "lL"[waslocked], "dD"[!!rdp->nocb_defer_wakeup], "tT"[wastimer], -- 2.9.5