Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1752864AbbGIBYt (ORCPT ); Wed, 8 Jul 2015 21:24:49 -0400 Received: from mail-ig0-f171.google.com ([209.85.213.171]:37946 "EHLO mail-ig0-f171.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1752655AbbGIBYk (ORCPT ); Wed, 8 Jul 2015 21:24:40 -0400 Date: Wed, 8 Jul 2015 18:24:37 -0700 (PDT) From: David Rientjes X-X-Sender: rientjes@chino.kir.corp.google.com To: Nishanth Aravamudan cc: Michael Ellerman , Peter Zijlstra , linux-kernel@vger.kernel.org, Paul Mackerras , Anton Blanchard , linuxppc-dev@lists.ozlabs.org Subject: Re: [RFC,1/2] powerpc/numa: fix cpu_to_node() usage during boot In-Reply-To: <20150708231623.GB44862@linux.vnet.ibm.com> Message-ID: References: <20150702230202.GA2807@linux.vnet.ibm.com> <20150708040056.948A1140770@ozlabs.org> <20150708231623.GB44862@linux.vnet.ibm.com> User-Agent: Alpine 2.10 (DEB 1266 2009-07-14) MIME-Version: 1.0 Content-Type: TEXT/PLAIN; charset=US-ASCII Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 762 Lines: 18 On Wed, 8 Jul 2015, Nishanth Aravamudan wrote: > > It looks like the symptom is that the per-cpu areas are all allocated on node > > 0, is that all that goes wrong? > > Yes, that's the symptom. I cc'd a few folks to see if they could help > indicate the performance implications of such a setup -- sorry, I should > have been more explicit about that. > Yeah, not sure it's really a bugfix but rather a performance optimization since cpu_to_node() with CONFIG_USE_PERCPU_NUMA_NODE_ID is only about performance. -- 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/