Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1754960AbZIMQPO (ORCPT ); Sun, 13 Sep 2009 12:15:14 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1754886AbZIMQPH (ORCPT ); Sun, 13 Sep 2009 12:15:07 -0400 Received: from e4.ny.us.ibm.com ([32.97.182.144]:44717 "EHLO e4.ny.us.ibm.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1754852AbZIMQPG (ORCPT ); Sun, 13 Sep 2009 12:15:06 -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, dvhltc@us.ibm.com, niv@us.ibm.com, tglx@linutronix.de, peterz@infradead.org, rostedt@goodmis.org, Valdis.Kletnieks@vt.edu, "Paul E. McKenney" Subject: [PATCH tip/core/rcu 1/4] Kconfig help needs to say that TREE_PREEMPT_RCU scales down Date: Sun, 13 Sep 2009 09:15:08 -0700 Message-Id: <12528585112362-git-send-email-> X-Mailer: git-send-email 1.5.2.5 In-Reply-To: <20090913161438.GA32550@linux.vnet.ibm.com> References: <20090913161438.GA32550@linux.vnet.ibm.com> Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org To quote Valdis: This leaves somebody who has a laptop wondering which choice is best for a system with only one or two cores that has CONFIG_PREEMPT defined. One choice says it scales down nicely, the other explicitly has a 'depends on PREEMPT' attached to it... So add "scales down nicely" to TREE_PREEMPT_RCU to match that of TREE_RCU. Suggested-by: Valdis Kletnieks Signed-off-by: Paul E. McKenney --- init/Kconfig | 3 ++- 1 files changed, 2 insertions(+), 1 deletions(-) diff --git a/init/Kconfig b/init/Kconfig index 8e8b76d..4c2c936 100644 --- a/init/Kconfig +++ b/init/Kconfig @@ -331,7 +331,8 @@ config TREE_PREEMPT_RCU This option selects the RCU implementation that is designed for very large SMP systems with hundreds or thousands of CPUs, but for which real-time response - is also required. + is also required. It also scales down nicely to + smaller systems. endchoice -- 1.5.2.5 -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/