Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1756680Ab3ILURq (ORCPT ); Thu, 12 Sep 2013 16:17:46 -0400 Received: from e37.co.us.ibm.com ([32.97.110.158]:37353 "EHLO e37.co.us.ibm.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1756567Ab3ILURl (ORCPT ); Thu, 12 Sep 2013 16:17:41 -0400 Date: Thu, 12 Sep 2013 13:17:17 -0700 From: "Paul E. McKenney" To: Mike Travis , Peter Zijlstra , Paul Mackerras , Ingo Molnar , Arnaldo Carvalho de Melo , Jason Wessel , "H. Peter Anvin" , Thomas Gleixner , Andrew Morton , Dimitri Sivanich , x86@kernel.org, linux-kernel@vger.kernel.org Subject: Re: [PATCH 9/9] x86/UV: Add ability to disable UV NMI handler Message-ID: <20130912201717.GX3966@linux.vnet.ibm.com> Reply-To: paulmck@linux.vnet.ibm.com References: <20130905225032.879120272@asylum.americas.sgi.com> <20130905225034.343366161@asylum.americas.sgi.com> <20130909124349.GY31370@twins.programming.kicks-ass.net> <522E0037.3090107@sgi.com> <20130910090349.GN26785@twins.programming.kicks-ass.net> <20130912172731.GR3966@linux.vnet.ibm.com> <52320F18.4040407@sgi.com> <20130912194833.GW8742@dangermouse.emea.sgi.com> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20130912194833.GW8742@dangermouse.emea.sgi.com> User-Agent: Mutt/1.5.21 (2010-09-15) X-TM-AS-MML: No X-Content-Scanned: Fidelis XPS MAILER x-cbid: 13091220-7164-0000-0000-00000195A03A Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 1039 Lines: 27 On Thu, Sep 12, 2013 at 08:48:33PM +0100, Hedi Berriche wrote: > On Thu, Sep 12, 2013 at 19:59 Mike Travis wrote: > | On 9/12/2013 10:27 AM, Paul E. McKenney wrote: > | > | > But what is it that you are looking for? If you want to silence it > | > completely, the rcu_cpu_stall_suppress boot/sysfs parameter is what > | > you want to use. > | > | We have by default rcutree.rcu_cpu_stall_suppress=1 on the kernel > | cmdline. I'll double check if it was set during my testing. > > FWIW, for recent enough kernels the correct boot parameter is > rcupdate.rcu_cpu_stall_suppress. > > It used to be rcutree.rcu_cpu_stall_suppress, but that has changed after > commit 6bfc09e. Good point, Hedi! That change happened when rcutiny gained RCU CPU stall warning capability. Thanx, Paul -- 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/