From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1752214Ab3HTCv0 (ORCPT ); Mon, 19 Aug 2013 22:51:26 -0400 Received: from e33.co.us.ibm.com ([32.97.110.151]:35749 "EHLO e33.co.us.ibm.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751876Ab3HTCvY (ORCPT ); Mon, 19 Aug 2013 22:51:24 -0400 From: "Paul E. McKenney" To: linux-kernel@vger.kernel.org Cc: mingo@elte.hu, laijs@cn.fujitsu.com, dipankar@in.ibm.com, akpm@linux-foundation.org, mathieu.desnoyers@polymtl.ca, josh@joshtriplett.org, niv@us.ibm.com, tglx@linutronix.de, peterz@infradead.org, rostedt@goodmis.org, dhowells@redhat.com, edumazet@google.com, darren@dvhart.com, fweisbec@gmail.com, sbw@mit.edu, "Paul E. McKenney" Subject: [PATCH tip/core/rcu 5/5] rcu: Make rcutorture emit online failures if verbose Date: Mon, 19 Aug 2013 19:51:14 -0700 Message-Id: <1376967074-32530-5-git-send-email-paulmck@linux.vnet.ibm.com> X-Mailer: git-send-email 1.8.1.5 In-Reply-To: <1376967074-32530-1-git-send-email-paulmck@linux.vnet.ibm.com> References: <20130818022453.GA3475@linux.vnet.ibm.com> <1376967074-32530-1-git-send-email-paulmck@linux.vnet.ibm.com> X-TM-AS-MML: No X-Content-Scanned: Fidelis XPS MAILER x-cbid: 13082002-2398-0000-0000-000001A4784C Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org From: "Paul E. McKenney" Although rcutorture counts CPU-hotplug online failures, it does not explicitly record which CPUs were having trouble coming online. This commit therefore emits a console message when online failure occurs. Signed-off-by: Paul E. McKenney Reviewed-by: Josh Triplett --- kernel/rcutorture.c | 8 +++++++- 1 file changed, 7 insertions(+), 1 deletion(-) diff --git a/kernel/rcutorture.c b/kernel/rcutorture.c index 869dac2..a4a73d4 100644 --- a/kernel/rcutorture.c +++ b/kernel/rcutorture.c @@ -1434,7 +1434,13 @@ rcu_torture_onoff(void *arg) torture_type, cpu); starttime = jiffies; n_online_attempts++; - if (cpu_up(cpu) == 0) { + ret = cpu_up(cpu); + if (ret) { + if (verbose) + pr_alert("%s" TORTURE_FLAG + "rcu_torture_onoff task: online %d failed: errno %d\n", + torture_type, cpu, ret); + } else { if (verbose) pr_alert("%s" TORTURE_FLAG "rcu_torture_onoff task: onlined %d\n", -- 1.8.1.5