Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1030320AbWHOOjp (ORCPT ); Tue, 15 Aug 2006 10:39:45 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1030321AbWHOOjp (ORCPT ); Tue, 15 Aug 2006 10:39:45 -0400 Received: from rtr.ca ([64.26.128.89]:35256 "EHLO mail.rtr.ca") by vger.kernel.org with ESMTP id S1030320AbWHOOjo (ORCPT ); Tue, 15 Aug 2006 10:39:44 -0400 Message-ID: <44E1DCAE.9020803@rtr.ca> Date: Tue, 15 Aug 2006 10:39:42 -0400 From: Mark Lord User-Agent: Thunderbird 1.5.0.5 (X11/20060719) MIME-Version: 1.0 To: Alan Cox Cc: Jan Engelhardt , Linux Kernel Mailing List Subject: Re: HT not active References: <1155558984.24077.191.camel@localhost.localdomain> In-Reply-To: <1155558984.24077.191.camel@localhost.localdomain> Content-Type: text/plain; charset=ISO-8859-1; format=flowed Content-Transfer-Encoding: 7bit Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 703 Lines: 18 Alan Cox wrote: > > Hyperthreading must be BIOS enabled, its not something Linux can "turn > on". The "ht" flag merely indicates that the processor supports > hyperthreading not that it is enabled. Not quite. Even non-HT CPUs report the ht flag (I have one here). As somebody else said, ht just means the system supports querying the number of ht "siblings", even though that number might be zero. Somewhat misleading, though technically accurate. Cheers - 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/