From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1751702AbWBWKBB (ORCPT ); Thu, 23 Feb 2006 05:01:01 -0500 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1751703AbWBWKBB (ORCPT ); Thu, 23 Feb 2006 05:01:01 -0500 Received: from mail14.syd.optusnet.com.au ([211.29.132.195]:60119 "EHLO mail14.syd.optusnet.com.au") by vger.kernel.org with ESMTP id S1751701AbWBWKBA convert rfc822-to-8bit (ORCPT ); Thu, 23 Feb 2006 05:01:00 -0500 From: Con Kolivas To: Emmanuel Pacaud Subject: Re: isolcpus weirdness Date: Thu, 23 Feb 2006 21:00:45 +1100 User-Agent: KMail/1.9.1 Cc: Frederik Deweerdt , linux-kernel@vger.kernel.org References: <1140614487.13155.20.camel@localhost.localdomain> <20060222211817.GA13488@silenus.home.res> <1140688532.8314.10.camel@localhost.localdomain> In-Reply-To: <1140688532.8314.10.camel@localhost.localdomain> MIME-Version: 1.0 Content-Type: text/plain; charset="iso-8859-1" Content-Transfer-Encoding: 8BIT Content-Disposition: inline Message-Id: <200602232100.46551.kernel@kolivas.org> Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org On Thursday 23 February 2006 20:55, Emmanuel Pacaud wrote: > Le mercredi 22 février 2006 à 22:18 +0100, Frederik Deweerdt a écrit : > > On Wed, Feb 22, 2006 at 02:21:27PM +0100, Emmanuel Pacaud wrote: > > > What's wrong ? > > > > Are you able to reproduce the same behaviour after disabling HT in > > the kernel config? > > I think HT is disabled in kernel config, since I only see 2 cpus. > > In fact, I've tried to enable HT, but did'nt succeed. HT is enabled in > BIOS, but I'm not sure about exact things I must set at kernel config > level for hyperthreading. I've tried to set/unset CONFIG_SCHED_SMT, but > that changes nothing (no hyperthreading, isolated cpu is always cpu0). > > Here's attached my config file. CONFIG_ACPI is not set You need ACPI to enumerate hyperthread siblings. That's why HT never gets enabled for you. Cheers, Con