Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1757979AbZAMDVr (ORCPT ); Mon, 12 Jan 2009 22:21:47 -0500 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1752949AbZAMDVi (ORCPT ); Mon, 12 Jan 2009 22:21:38 -0500 Received: from one.firstfloor.org ([213.235.205.2]:48138 "EHLO one.firstfloor.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1752801AbZAMDVh (ORCPT ); Mon, 12 Jan 2009 22:21:37 -0500 Date: Tue, 13 Jan 2009 04:36:08 +0100 From: Andi Kleen To: Ingo Molnar Cc: Mike Travis , Frederik Deweerdt , andi@firstfloor.org, tglx@linutronix.de, hpa@zytor.com, linux-kernel@vger.kernel.org Subject: Re: [patch] tlb flush_data: replace per_cpu with an array Message-ID: <20090113033608.GN23848@one.firstfloor.org> References: <20090112213539.GA10720@gambetta> <496BCA21.2010709@sgi.com> <20090112235156.GC10720@gambetta> <496BD8FB.1050101@sgi.com> <20090113000112.GA10368@elte.hu> Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20090113000112.GA10368@elte.hu> User-Agent: Mutt/1.4.2.1i Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 571 Lines: 18 > > (And was it determined yet, that a cacheline has to be tossed around as > > well?) > > No, that assertion of Andi is wrong. For the IPI you always have to toss one cache line around to pass the information. Anyways the padding is just to avoid false sharing. -Andi -- ak@linux.intel.com -- Speaking for myself only. -- 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/