From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S967038AbaFTSeQ (ORCPT ); Fri, 20 Jun 2014 14:34:16 -0400 Received: from e36.co.us.ibm.com ([32.97.110.154]:40017 "EHLO e36.co.us.ibm.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1757272AbaFTSdc (ORCPT ); Fri, 20 Jun 2014 14:33:32 -0400 From: "Paul E. McKenney" To: linux-kernel@vger.kernel.org Cc: mingo@kernel.org, laijs@cn.fujitsu.com, dipankar@in.ibm.com, akpm@linux-foundation.org, mathieu.desnoyers@efficios.com, josh@joshtriplett.org, niv@us.ibm.com, tglx@linutronix.de, peterz@infradead.org, rostedt@goodmis.org, dhowells@redhat.com, edumazet@google.com, dvhart@linux.intel.com, fweisbec@gmail.com, oleg@redhat.com, sbw@mit.edu, "Paul E. McKenney" , Andi Kleen , Christoph Lameter , Mike Galbraith , Eric Dumazet Subject: [PATCH RFC tip/core/rcu 4/5] rcutorture: Suppress spurious RCU CPU stall warnings Date: Fri, 20 Jun 2014 11:33:22 -0700 Message-Id: <1403289203-6371-4-git-send-email-paulmck@linux.vnet.ibm.com> X-Mailer: git-send-email 1.8.1.5 In-Reply-To: <1403289203-6371-1-git-send-email-paulmck@linux.vnet.ibm.com> References: <20140620183249.GA6325@linux.vnet.ibm.com> <1403289203-6371-1-git-send-email-paulmck@linux.vnet.ibm.com> X-TM-AS-MML: disable X-Content-Scanned: Fidelis XPS MAILER x-cbid: 14062018-3532-0000-0000-0000029C8147 Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org From: "Paul E. McKenney" Because rcutorture runs CPU-bound in the kernel, it can prevent grace periods from being reported. In RCU_COND_RESCHED_QS=y builds, the cond_resched() calls handle this reporting. This commit therefore forces RCU_COND_RESCHED_QS=y for the TREE01 rcutorture configuration, which is otherwise prone to spurious RCU CPU stall warnings. Signed-off-by: Paul E. McKenney Cc: Josh Triplett Cc: Andi Kleen Cc: Christoph Lameter Cc: Mike Galbraith Cc: Eric Dumazet --- tools/testing/selftests/rcutorture/configs/rcu/TREE01 | 1 + 1 file changed, 1 insertion(+) diff --git a/tools/testing/selftests/rcutorture/configs/rcu/TREE01 b/tools/testing/selftests/rcutorture/configs/rcu/TREE01 index 9c827ec59a97..82e70bc38125 100644 --- a/tools/testing/selftests/rcutorture/configs/rcu/TREE01 +++ b/tools/testing/selftests/rcutorture/configs/rcu/TREE01 @@ -4,6 +4,7 @@ CONFIG_PREEMPT_NONE=n CONFIG_PREEMPT_VOLUNTARY=n CONFIG_PREEMPT=y #CHECK#CONFIG_TREE_PREEMPT_RCU=y +CONFIG_RCU_COND_RESCHED_QS=y CONFIG_HZ_PERIODIC=n CONFIG_NO_HZ_IDLE=y CONFIG_NO_HZ_FULL=n -- 1.8.1.5