Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1759409AbaGXO6w (ORCPT ); Thu, 24 Jul 2014 10:58:52 -0400 Received: from mail-wi0-f177.google.com ([209.85.212.177]:38887 "EHLO mail-wi0-f177.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1758976AbaGXO6v (ORCPT ); Thu, 24 Jul 2014 10:58:51 -0400 Date: Thu, 24 Jul 2014 16:58:45 +0200 From: Frederic Weisbecker To: "Paul E. McKenney" Cc: linux-kernel@vger.kernel.org, mingo@kernel.org, laijs@cn.fujitsu.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, dvhart@linux.intel.com, oleg@redhat.com, bobby.prani@gmail.com Subject: Re: [PATCH RFC tip/core/rcu 2/2] Don't track sysidle state if no nohz_full= CPUs Message-ID: <20140724145842.GB25788@localhost.localdomain> References: <20140723162851.GA17665@linux.vnet.ibm.com> <20140723162951.GA17743@linux.vnet.ibm.com> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20140723162951.GA17743@linux.vnet.ibm.com> User-Agent: Mutt/1.5.23 (2014-03-12) Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On Wed, Jul 23, 2014 at 09:29:51AM -0700, Paul E. McKenney wrote: > If there are no nohz_full= CPUs, then there is currently no reason to > track sysidle state. This commit therefore short-circuits this state > tracking if !tick_nohz_full_enabled(). > > Note that these checks will need to be revisited if nohz_full= state > can ever be changed at runtime. > > Signed-off-by: Paul E. McKenney Acked-by: Frederic Weisbecker -- 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/