From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1759997AbYEILcf (ORCPT ); Fri, 9 May 2008 07:32:35 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1752544AbYEILc1 (ORCPT ); Fri, 9 May 2008 07:32:27 -0400 Received: from web32605.mail.mud.yahoo.com ([68.142.207.232]:46739 "HELO web32605.mail.mud.yahoo.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with SMTP id S1752931AbYEILc1 (ORCPT ); Fri, 9 May 2008 07:32:27 -0400 X-YMail-OSG: y0XWH24VM1mBeNN0Y_2o8t3lPanDyAjoCIx.3l1G23xDrrJDlPRAHEdMNgH7G_f4jzna6Yy7581Sr8AXVi3lWfQbMW4fV5TV6oe8j2S7sSrC1a4Y0Nweyo2uZ3zWmC.DLVJV8ieRpbUnTio- X-Mailer: YahooMailRC/975.23 YahooMailWebService/0.7.185 Date: Fri, 9 May 2008 04:32:26 -0700 (PDT) From: Martin Knoblauch Subject: Re: 2.6.25.2 - Jiffies/Time jumping back and forth (Regereesion from 2.6.24) To: Thomas Gleixner Cc: Gabriel C , Bart Van Assche , linux-kernel@vger.kernel.org, hmh@hmh.eng.br, John Stultz MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Message-ID: <156547.88374.qm@web32605.mail.mud.yahoo.com> Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org ------------------------------------------------------ Martin Knoblauch email: k n o b i AT knobisoft DOT de www: http://www.knobisoft.de ----- Original Message ---- > From: Thomas Gleixner > To: Martin Knoblauch > Cc: Gabriel C ; Bart Van Assche ; linux-kernel@vger.kernel.org; hmh@hmh.eng.br > Sent: Thursday, May 8, 2008 4:13:55 PM > Subject: Re: 2.6.25.2 - Jiffies/Time jumping back and forth (Regereesion from 2.6.24) > > On Thu, 8 May 2008, Martin Knoblauch wrote: > > on two different systems running 2.6.25.2: > > > > ibm x3650(2xDualCore) > > ------------------------------------- > > [root@lpsdm60 ~]# cat > /sys/devices/system/clocksource/clocksource0/available_clocksource > > tsc hpet acpi_pm jiffies > > [root@lpsdm60 ~]# cat > /sys/devices/system/clocksource/clocksource0/current_clocksource > > tsc > > > > HP Proliant DL-380G4 (2xSingleCore) > > ------------------------------------------------------------ > > [root@lpsdm52 ~]# cat > /sys/devices/system/clocksource/clocksource0/available_clocksource > > tsc hpet acpi_pm jiffies > > [root@lpsdm52 ~]# cat > /sys/devices/system/clocksource/clocksource0/current_clocksource > > tsc > > > > and on the DL380G4 running 2.6.24: > > --------------------------------------------------------- > > [root@lpsdm52 ~]# cat > /sys/devices/system/clocksource/clocksource0/available_clocksource > > hpet acpi_pm jiffies tsc > > [root@lpsdm52 ~]# cat > /sys/devices/system/clocksource/clocksource0/current_clocksource > > hpet > > So on 2.6.24 the TSC is declared unstable at some point and 2.6.25 > thinks it works fine. Is this the same kernel config (aside of the 24/25 fuzz) ? > > Thanks, > tglx Just for documentation, I have opened: http://bugzilla.kernel.org/show_bug.cgi?id=10656 Cheers Martin