Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1758931AbYKWPP1 (ORCPT ); Sun, 23 Nov 2008 10:15:27 -0500 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1758254AbYKWPPT (ORCPT ); Sun, 23 Nov 2008 10:15:19 -0500 Received: from mx2.mail.elte.hu ([157.181.151.9]:60725 "EHLO mx2.mail.elte.hu" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1758242AbYKWPPS (ORCPT ); Sun, 23 Nov 2008 10:15:18 -0500 Date: Sun, 23 Nov 2008 16:15:07 +0100 From: Ingo Molnar To: Richard Kennedy Cc: tglx@linutronix.de, lkml , "H. Peter Anvin" Subject: Re: [PATCH] irq.h remove padding from irq_desc on 64bits Message-ID: <20081123151507.GE3224@elte.hu> References: <1227450883.2970.11.camel@castor.localdomain> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <1227450883.2970.11.camel@castor.localdomain> User-Agent: Mutt/1.5.18 (2008-05-17) X-ELTE-VirusStatus: clean X-ELTE-SpamScore: -1.5 X-ELTE-SpamLevel: X-ELTE-SpamCheck: no X-ELTE-SpamVersion: ELTE 2.0 X-ELTE-SpamCheck-Details: score=-1.5 required=5.9 tests=BAYES_00 autolearn=no SpamAssassin version=3.2.3 -1.5 BAYES_00 BODY: Bayesian spam probability is 0 to 1% [score: 0.0000] Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 714 Lines: 23 * Richard Kennedy wrote: > struct irq_desc : reorder to remove padding on 64bits > > shrinks irq_desc to 128 bytes which saves data space & cache lines > > On a generic x86_64/SMP build this reduces the reported data size by > 64k. > > Signed-off-by: Richard Kennedy > > ---- > This patch is against 2.628-rc6, built & tested on AMD 64x2 desktop. nice one - applied to tip/irq/core, thanks Richard! Ingo -- 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/