Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1759688AbYALTse (ORCPT ); Sat, 12 Jan 2008 14:48:34 -0500 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1752706AbYALTs0 (ORCPT ); Sat, 12 Jan 2008 14:48:26 -0500 Received: from twinlark.arctic.org ([208.69.40.136]:39267 "EHLO twinlark.arctic.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751260AbYALTsZ (ORCPT ); Sat, 12 Jan 2008 14:48:25 -0500 Date: Sat, 12 Jan 2008 11:48:24 -0800 (PST) From: dean gaudet To: linux-kernel@vger.kernel.org Subject: nosmp/maxcpus=0 or 1 -> TSC unstable Message-ID: User-Agent: Alpine 0.999999 (DEB 847 2007-12-06) MIME-Version: 1.0 Content-Type: TEXT/PLAIN; charset=US-ASCII Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 748 Lines: 18 if i boot an x86 64-bit 2.6.24-rc7 kernel with nosmp, maxcpus=0 or 1 it still disables TSC :) Marking TSC unstable due to TSCs unsynchronized this is an opteron 2xx box which does have two cpus and no clock-divide in halt or cpufreq enabled so TSC should be fine with only one cpu. pretty sure this is the culprit is that num_possible_cpus() > 1, which would mean cpu_possible_map contains the second cpu... but i'm not quite sure what the right fix is... or perhaps this is all intended. -dean -- 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/