From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1751413AbVH3MUa (ORCPT ); Tue, 30 Aug 2005 08:20:30 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1751419AbVH3MUa (ORCPT ); Tue, 30 Aug 2005 08:20:30 -0400 Received: from smtp4.wanadoo.fr ([193.252.22.27]:42578 "EHLO smtp4.wanadoo.fr") by vger.kernel.org with ESMTP id S1751413AbVH3MU3 (ORCPT ); Tue, 30 Aug 2005 08:20:29 -0400 X-ME-UUID: 20050830122026309.4B9DD1C0017F@mwinf0408.wanadoo.fr Date: Tue, 30 Aug 2005 14:24:16 +0200 From: Philippe Elie To: Chase Venters Cc: linux-kernel@vger.kernel.org Subject: Re: Second "CPU" of 1-core HyperThreading CPU not found in 2.6.13 Message-ID: <20050830122416.GD848@zaniah> References: <200508292303.52735.chase.venters@clientec.com> Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <200508292303.52735.chase.venters@clientec.com> User-Agent: Mutt/1.4.2.1i Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org On Mon, 29 Aug 2005 at 23:03 +0000, Chase Venters wrote: > Greetings kind hackers... > I recently switched to 2.6.13 on my desktop. I noticed that the second > "CPU" (is there a better term to use in this HyperThreading scenario?) that > used to be listed in /proc/cpuinfo is no longer present. Browsing over the > archives, it appears as if someone else had this problem... their solution > was to enable CONFIG_PM, but I already have CONFIG_PM enabled. > I have to boot with 'noapic' because I have my CD-Writer hanging off an > aic7xxx, and that driver goes into a nice error loop if I boot without it. > I'll include some lspci output below in case it is useful. There's one more > thing I noticed in the transition to 2.6.13, but I'm really not sure where I > could start diagnosing it, and so any suggestions would be marvelous. > As I mentioned, this machine is my desktop. In the past, I've been able to > run compilers / other intensive tasks while listening to music in XMMS - the > playback is never disrupted (indeed, on this P4 3.2ghz XMMS takes virtually > none of the processor). Yet I've noticed enough momentary stops in sound > output now to begin to suspect I've got some kind of problem. > Last kernels that were functional in both regards were 2.6.12.4 and 2.6.11.7. > Please note that I have not compiled with the new default tick rate of 250Hz > - I'm running 1000Hz, and I have also enabled the Preemptible kernel and BKL > Preemption as I have in earlier kernels. I needed CONFIG_PM=y and CONFIG_ACPI=y to get ht working on 2.6.13. regards, Philippe Elie