From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1753686AbZAEEvt (ORCPT ); Sun, 4 Jan 2009 23:51:49 -0500 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1752295AbZAEEvk (ORCPT ); Sun, 4 Jan 2009 23:51:40 -0500 Received: from one.firstfloor.org ([213.235.205.2]:43774 "EHLO one.firstfloor.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1752278AbZAEEvj (ORCPT ); Sun, 4 Jan 2009 23:51:39 -0500 Date: Mon, 5 Jan 2009 06:05:29 +0100 From: Andi Kleen To: "Paul E. McKenney" Cc: linux-kernel@vger.kernel.org, mingo@elte.hu, andi@firstfloor.org, snakebyte@gmx.de, akpm@linux-foundation.org, dvhltc@us.ibm.com, niv@us.ibm.com, manfred@colorfullife.com, laijs@cn.fujitsu.com Subject: Re: [PATCH] Fix rcutree grace-period-latency bug on small systems Message-ID: <20090105050529.GH496@one.firstfloor.org> References: <20090105043006.GA22049@linux.vnet.ibm.com> Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20090105043006.GA22049@linux.vnet.ibm.com> User-Agent: Mutt/1.4.2.1i Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org > The following patch properly updates the ->signaled field for the > "small"-system case (no more than 32 CPUs for 32-bit kernels and no more > than 64 CPUs for 64-bit kernels). > > I believe that this patch should be included for 2.6.29. Yes, it's really needed. One of my test system takes forever to boot without it when tree rcu is enabled. Thanks Paul for the debugging work. -Andi