From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1760618AbZANLUZ (ORCPT ); Wed, 14 Jan 2009 06:20:25 -0500 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1755087AbZANLUJ (ORCPT ); Wed, 14 Jan 2009 06:20:09 -0500 Received: from mx2.mail.elte.hu ([157.181.151.9]:37894 "EHLO mx2.mail.elte.hu" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1754234AbZANLUH (ORCPT ); Wed, 14 Jan 2009 06:20:07 -0500 Date: Wed, 14 Jan 2009 12:19:49 +0100 From: Ingo Molnar To: Mike Travis Cc: Yinghai Lu , "H. Peter Anvin" , Thomas Gleixner , "linux-kernel@vger.kernel.org" Subject: Re: [PATCH] x86: arch_probe_nr_irqs Message-ID: <20090114111949.GO2913@elte.hu> References: <496AD835.6000509@kernel.org> <20090112091952.GI26750@elte.hu> <20090112092613.GA1822@elte.hu> <496B9FC3.7080306@kernel.org> <496BCD14.3020201@sgi.com> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <496BCD14.3020201@sgi.com> User-Agent: Mutt/1.5.18 (2008-05-17) X-ELTE-VirusStatus: clean X-ELTE-SpamScore: 1.0 X-ELTE-SpamLevel: s X-ELTE-SpamCheck: no X-ELTE-SpamVersion: ELTE 2.0 X-ELTE-SpamCheck-Details: score=1.0 required=5.9 tests=BAYES_50 autolearn=no SpamAssassin version=3.2.3 1.0 BAYES_50 BODY: Bayesian spam probability is 40 to 60% [score: 0.4998] Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org * Mike Travis wrote: > Yinghai Lu wrote: > > Impact: save RAM with large NR_CPUS, get smaller nr_irqs > > > > Signed-off-by: Yinghai Lu > > Built and tested on an 8-core intel system. Great reduction > in NR_IRQS: > > [ 0.000000] NR_IRQS:33024 nr_irqs:320 > > Thanks Yinghai! > > Ingo - shall I push this one as well? (If not, then you > can add my: > > Acked-by: Mike Travis yes, please pick it up and i can pull it from you. Please also add a longer changelog about the precise effects and perhaps some estimations about what the before and after situation is, and perhaps also some bits about how it affects normal Linux users as well. Ingo