From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S263129AbVG3T2g (ORCPT ); Sat, 30 Jul 2005 15:28:36 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S263115AbVG3T0S (ORCPT ); Sat, 30 Jul 2005 15:26:18 -0400 Received: from silver.veritas.com ([143.127.12.111]:42166 "EHLO silver.veritas.com") by vger.kernel.org with ESMTP id S263117AbVG3TZk (ORCPT ); Sat, 30 Jul 2005 15:25:40 -0400 Date: Sat, 30 Jul 2005 20:27:24 +0100 (BST) From: Hugh Dickins X-X-Sender: hugh@goblin.wat.veritas.com To: Frank van Maarseveen cc: Andrew Morton , Len Brown , linux-kernel@vger.kernel.org Subject: Re: 2.6.13-rc4: no hyperthreading and idr_remove() stack traces In-Reply-To: <20050729162006.GA18866@janus> Message-ID: References: <20050729162006.GA18866@janus> MIME-Version: 1.0 Content-Type: TEXT/PLAIN; charset=US-ASCII X-OriginalArrivalTime: 30 Jul 2005 19:25:39.0927 (UTC) FILETIME=[7853EE70:01C5953C] Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org On Fri, 29 Jul 2005, Frank van Maarseveen wrote: > 2.6.13-rc4 does not recognize the second CPU of a 3GHz HT P4: I think your problem is this: HT has depended on CONFIG_ACPI for some while, and now in 2.6.13-rc CONFIG_ACPI depends on CONFIG_PM. You don't have CONFIG_PM set in your .config (nor had I), so you don't get ACPI, so you don't get HT. I don't know why CONFIG_ACPI now depends on CONFIG_PM: it seemed gratuitous when it first hit me, looked like someone just felt it was a nice arrangement. But seems particularly unhelpful for HT. On the other hand, I can well understand Len wanting to simplify the ACPI config interdependencies, which have caused breakage after breakage after breakage. Hugh