Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1764578AbXFRR6g (ORCPT ); Mon, 18 Jun 2007 13:58:36 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1761397AbXFRR62 (ORCPT ); Mon, 18 Jun 2007 13:58:28 -0400 Received: from e3.ny.us.ibm.com ([32.97.182.143]:32845 "EHLO e3.ny.us.ibm.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1760566AbXFRR62 (ORCPT ); Mon, 18 Jun 2007 13:58:28 -0400 Date: Mon, 18 Jun 2007 23:36:57 +0530 From: Srivatsa Vaddagiri To: "Paul E. McKenney" Cc: Ingo Molnar , Thomas Gleixner , Dinakar Guniguntala , Dmitry Adamushko , suresh.b.siddha@intel.com, pwil3058@bigpond.net.au, clameter@sgi.com, linux-kernel@vger.kernel.org, akpm@linux-foundation.org Subject: Re: v2.6.21.4-rt11 Message-ID: <20070618180657.GC21037@linux.vnet.ibm.com> Reply-To: vatsa@linux.vnet.ibm.com References: <20070613184741.GC8125@linux.vnet.ibm.com> <20070613185522.GA27335@elte.hu> <20070613233910.GJ8125@linux.vnet.ibm.com> <20070615144535.GA12078@elte.hu> <20070615151452.GC9301@linux.vnet.ibm.com> <20070615195545.GA28872@elte.hu> <20070616011605.GH9301@linux.vnet.ibm.com> <20070616084434.GG2559@linux.vnet.ibm.com> <20070616161213.GA2994@linux.vnet.ibm.com> <20070618151215.GA9750@linux.vnet.ibm.com> Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20070618151215.GA9750@linux.vnet.ibm.com> User-Agent: Mutt/1.5.11 Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 735 Lines: 20 On Mon, Jun 18, 2007 at 08:42:15PM +0530, Srivatsa Vaddagiri wrote: > If you don't have CONFIG_NUMA enabled, > then we won't have cross-node (i.e cross-cpu) load balancing. Mmm ..that is not correct. I found that disabling CONFIG_NUMA leads to better load balance on the problem system (i.e w/o any patches applied 2.6.22-rc4-mm2 leads to good distribution of rcu readers on all 4 cpus). Anyway, the patch is still needed for scenarios like you originally tested with. -- Regards, vatsa - 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/