From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S964903AbVLIXtL (ORCPT ); Fri, 9 Dec 2005 18:49:11 -0500 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S964904AbVLIXtL (ORCPT ); Fri, 9 Dec 2005 18:49:11 -0500 Received: from smtp1.Stanford.EDU ([171.67.16.123]:25484 "EHLO smtp1.Stanford.EDU") by vger.kernel.org with ESMTP id S964903AbVLIXtK (ORCPT ); Fri, 9 Dec 2005 18:49:10 -0500 Subject: 2.6.14-rt22 From: Fernando Lopez-Lezcano To: linux-kernel@vger.kernel.org, Thomas Gleixner , Steven Rostedt , Ingo Molnar , john stultz Cc: nando@ccrma.Stanford.EDU Content-Type: text/plain Date: Fri, 09 Dec 2005 15:48:25 -0800 Message-Id: <1134172105.12624.27.camel@cmn3.stanford.edu> Mime-Version: 1.0 X-Mailer: Evolution 2.2.3 (2.2.3-2.fc4) Content-Transfer-Encoding: 7bit Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org Hi all, I'm running 2.6.14-rt22 and just noticed something strange. I have not installed it in all machines yet, but in some of them (same hardware as others that seems to work fine) the TSC was selected as the main clock for the kernel. Remember this is one of the Athlon X2 machines in which the TCS's drift... dmesg shows this: PM-Timer running at invalid rate: 2172% of normal - aborting. and after that the tsc is selected as the timing source. Time: tsc clocksource has been installed. The strange thing is that this is the same hardware as on other machines. I have to install this kernel on more machines, will report then... This is what's available after the boot: # cat /sys/devices/system/clocksource/clocksource0/available_clocksource jiffies tsc pit So I selected by hand: # cat /sys/devices/system/clocksource/clocksource0/current_clocksource pit On the machine that's not selecting tsc the options are: # cat /sys/devices/system/clocksource/clocksource0/available_clocksource acpi_pm jiffies tsc pi (and acpi_pm is selected, of course). I think TSC's should never be selected on this hardware and it is known not to work. -- Fernando