From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S932793AbWKMTJx (ORCPT ); Mon, 13 Nov 2006 14:09:53 -0500 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1755338AbWKMTJx (ORCPT ); Mon, 13 Nov 2006 14:09:53 -0500 Received: from mx2.mail.elte.hu ([157.181.151.9]:2475 "EHLO mx2.mail.elte.hu") by vger.kernel.org with ESMTP id S1755333AbWKMTJw (ORCPT ); Mon, 13 Nov 2006 14:09:52 -0500 Date: Mon, 13 Nov 2006 20:08:57 +0100 From: Ingo Molnar To: Andi Kleen Cc: "Siddha, Suresh B" , Andrew Morton , linux-kernel@vger.kernel.org, ashok.raj@intel.com Subject: Re: [patch] genapic: optimize & fix APIC mode setup Message-ID: <20061113190857.GA29904@elte.hu> References: <20061111151414.GA32507@elte.hu> <200611131529.46464.ak@suse.de> <20061113150415.GA20321@elte.hu> <200611131710.13285.ak@suse.de> <20061113163216.GA3480@elte.hu> Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20061113163216.GA3480@elte.hu> User-Agent: Mutt/1.4.2.2i X-ELTE-SpamScore: -2.8 X-ELTE-SpamLevel: X-ELTE-SpamCheck: no X-ELTE-SpamVersion: ELTE 2.0 X-ELTE-SpamCheck-Details: score=-2.8 required=5.9 tests=ALL_TRUSTED,AWL,BAYES_50 autolearn=no SpamAssassin version=3.0.3 -3.3 ALL_TRUSTED Did not pass through any untrusted hosts 0.5 BAYES_50 BODY: Bayesian spam probability is 40 to 60% [score: 0.5000] -0.0 AWL AWL: From: address is in the auto white-list X-ELTE-VirusStatus: clean Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org * Ingo Molnar wrote: > [...] If something is cheap then other costs added to (such as > cpu-mask scanning, and passing around the cpumask) definitely do > matter. btw., i dont claim this is a big issue - we could solve this for the common case even in physical delivery mode by adding a 'single IPI delivery' callback to the genapic methods. That could be used by the reschedule IPI for example. Ingo