Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1755901AbZJTHMB (ORCPT ); Tue, 20 Oct 2009 03:12:01 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1755443AbZJTHMA (ORCPT ); Tue, 20 Oct 2009 03:12:00 -0400 Received: from gw1.cosmosbay.com ([212.99.114.194]:54352 "EHLO gw1.cosmosbay.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1755366AbZJTHL7 (ORCPT ); Tue, 20 Oct 2009 03:11:59 -0400 Message-ID: <4ADD62AA.8060503@gmail.com> Date: Tue, 20 Oct 2009 09:11:38 +0200 From: Eric Dumazet User-Agent: Thunderbird 2.0.0.23 (Windows/20090812) MIME-Version: 1.0 To: Ingo Molnar CC: Jiri Kosina , Jeff Mahoney , Peter Zijlstra , Linux Kernel Mailing List , Tony Luck , Fenghua Yu , linux-ia64@vger.kernel.org Subject: Re: Commit 34d76c41 causes linker errors on ia64 with NR_CPUS=4096 References: <4ADB967A.4080707@suse.com> <20091020061557.GE8550@elte.hu> <20091020063555.GJ8550@elte.hu> In-Reply-To: <20091020063555.GJ8550@elte.hu> Content-Type: text/plain; charset=ISO-8859-1 Content-Transfer-Encoding: 8bit X-Greylist: Sender IP whitelisted, not delayed by milter-greylist-1.6 (gw1.cosmosbay.com [0.0.0.0]); Tue, 20 Oct 2009 09:11:39 +0200 (CEST) Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 787 Lines: 23 Ingo Molnar a ?crit : > Still looks like a bug if it causes a breakage (linker error) on IA64, > and if the 'fix' (i'd call it a workaround) causes a (small but nonzero) > performance regression on other architectures. > True, but this also save some amount of ram for some distro kernels. If we keep this static NR_CPUS thing, we might be able to free the end of table, for other per_cpu users ? if (nr_cpus_ids < NR_CPUS) { per_cpu_free_static_zone(&update_shares_data[nr_cpus_ids], sizeof(long)*(NR_CPUS - nr_cpus_ids)); } -- 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/