From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1756425Ab0AMVqh (ORCPT ); Wed, 13 Jan 2010 16:46:37 -0500 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1756041Ab0AMVqg (ORCPT ); Wed, 13 Jan 2010 16:46:36 -0500 Received: from one.firstfloor.org ([213.235.205.2]:58439 "EHLO one.firstfloor.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1756039Ab0AMVqg (ORCPT ); Wed, 13 Jan 2010 16:46:36 -0500 To: Yinghai Lu Cc: Suresh Siddha , Linus Torvalds , "ananth@in.ibm.com" , Ingo Molnar , Thomas Gleixner , "H. Peter Anvin" , Andrew Morton , "linux-kernel@vger.kernel.org" Subject: Re: [PATCH -v2 5/5] x86: use dmi check to treat disabled cpus as hotplug cpus. From: Andi Kleen References: <1263338274-6485-1-git-send-email-yinghai@kernel.org> <1263338274-6485-5-git-send-email-yinghai@kernel.org> <1263340563.2854.1011.camel@sbs-t61.sc.intel.com> <4B4D0E39.10200@kernel.org> Date: Wed, 13 Jan 2010 22:46:31 +0100 In-Reply-To: <4B4D0E39.10200@kernel.org> (Yinghai Lu's message of "Tue, 12 Jan 2010 16:05:13 -0800") Message-ID: <87tyupfzk8.fsf@basil.nowhere.org> User-Agent: Gnus/5.1008 (Gnus v5.10.8) Emacs/22.3 (gnu/linux) MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Yinghai Lu writes: > > so you want to treat those disabled cpus in the those system as hotplug cpus or not? Why not? It's not that a hotplug cpu is particularly expensive. It's just a bunch of memory and not even very much of it. White and blacklists just to save a small amount of memory seem like a bad idea. -Andi -- ak@linux.intel.com -- Speaking for myself only.