From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S262116AbTLCWkf (ORCPT ); Wed, 3 Dec 2003 17:40:35 -0500 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S262119AbTLCWkf (ORCPT ); Wed, 3 Dec 2003 17:40:35 -0500 Received: from holomorphy.com ([199.26.172.102]:65230 "EHLO holomorphy") by vger.kernel.org with ESMTP id S262116AbTLCWk3 (ORCPT ); Wed, 3 Dec 2003 17:40:29 -0500 Date: Wed, 3 Dec 2003 14:40:23 -0800 From: William Lee Irwin III To: Ethan Weinstein Cc: linux-kernel@vger.kernel.org Subject: Re: HT apparently not detected properly on 2.4.23 Message-ID: <20031203224023.GV8039@holomorphy.com> Mail-Followup-To: William Lee Irwin III , Ethan Weinstein , linux-kernel@vger.kernel.org References: <3FCE2F8E.90104@stinkfoot.org> Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <3FCE2F8E.90104@stinkfoot.org> Organization: The Domain of Holomorphy User-Agent: Mutt/1.5.4i Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org On Wed, Dec 03, 2003 at 01:46:38PM -0500, Ethan Weinstein wrote: > With 2.4.22, my Supermicro X5DPL-iGM-O (E7501 chipset) with 2 > xeons@2.4ghz and hypertherading enabled shows 4 cpu's in > /proc/cpuinfo|proc/interrupts, with: > CONFIG_ACPI=y > CONFIG_ACPI_HT_ONLY=y > The same config with 2.4.23 only shows 2 cpus, even with: > CONFIG_NR_CPUS=4 > Also, I believe this has been reported before, but the system only seems > to interrupt on CPU0 with either kernel, unless I apply a patch I found > here: > http://www.hardrock.org/kernel/2.4.22/irqbalance-2.4.22-MRC.patch > or run the `irqbalance' program.. which I don't care to do. This > problem _seems_ to be isolated to the Supermicro, as HT does seem > properly detected on several other SMP systems I have at work (compaq > ML370/ML380) with 2.4.23 You probably have sparse physical APIC ID's. -- wli