Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id ; Sat, 21 Sep 2002 17:48:57 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id ; Sat, 21 Sep 2002 17:48:57 -0400 Received: from duck.doc.ic.ac.uk ([146.169.1.46]:53008 "EHLO duck.doc.ic.ac.uk") by vger.kernel.org with ESMTP id ; Sat, 21 Sep 2002 17:48:56 -0400 Date: Sat, 21 Sep 2002 22:54:04 +0100 (BST) From: Guido Arenstedt To: James Cleverdon cc: linux-kernel@vger.kernel.org Subject: Re: Hyperthreading in -ac series In-Reply-To: <200209201547.59508.jamesclv@us.ibm.com> Message-ID: MIME-Version: 1.0 Content-Type: TEXT/PLAIN; charset=US-ASCII Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 1091 Lines: 30 On Fri, 20 Sep 2002, James Cleverdon wrote: >On Friday 20 September 2002 03:36 pm, Guido Arenstedt wrote: >> Hyperthreading does not seem to work in the -ac series >> it works fine with a stock 2.4.19 kernel >> >> during bootup i only get the message: >> WARNING: No sibling found for CPU 0. >> WARNING: No sibling found for CPU 1. >> >> or is this done on purpose? > >The latter. Hyperthreading _is_ working in the kernel, but it is not finding >"sibling" CPUs to match the real ones. (Or, as we prefer to call them, >DiVitos to match the Schwartzenegers. ;^) > >Check your BIOS. Some turn off hyperthreading by default. (Notably, IBM's >x440....) no hyperthreading is on in the bios my problem is that hyperthreading does not work with an -ac kernel (i have check 2.4.19-ac4 and 2.4.20-pre5-ac4) whereas a stock kernel is working fine. - 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/