Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1757964AbZGKARb (ORCPT ); Fri, 10 Jul 2009 20:17:31 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1756833AbZGKARX (ORCPT ); Fri, 10 Jul 2009 20:17:23 -0400 Received: from smtp3.Stanford.EDU ([171.67.219.83]:44820 "EHLO smtp3.stanford.edu" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1756810AbZGKARW (ORCPT ); Fri, 10 Jul 2009 20:17:22 -0400 Subject: Re: [ANNOUNCE] 2.6.29.6-rt23 From: Fernando Lopez-Lezcano To: Thomas Gleixner Cc: nando@ccrma.Stanford.EDU, LKML , rt-users , Ingo Molnar , Steven Rostedt , Peter Zijlstra , Carsten Emde , Clark Williams , Frank Rowand , Robin Gareus , Gregory Haskins , Philippe Reynes , Will Schmidt , Darren Hart , Jan Blunck , Sven-Thorsten Dietrich , Jon Masters In-Reply-To: References: <1247249002.18898.11.camel@localhost.localdomain> Content-Type: text/plain Date: Fri, 10 Jul 2009 17:17:26 -0700 Message-Id: <1247271446.18898.28.camel@localhost.localdomain> Mime-Version: 1.0 X-Mailer: Evolution 2.24.5 (2.24.5-2.fc10) Content-Transfer-Encoding: 7bit Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 2116 Lines: 54 On Fri, 2009-07-10 at 20:29 +0200, Thomas Gleixner wrote: > On Fri, 10 Jul 2009, Fernando Lopez-Lezcano wrote: > > On Thu, 2009-07-09 at 20:25 +0200, Thomas Gleixner wrote: > > > We are pleased to announce the next update to our new preempt-rt > > > series. > > > > > > - update to 2.6.29.6 > > > > > > - compile fixes (Wu Zhangjin) > > > > > > - powerpc highmem fix > > > > > > - hwlat smp_processor_id() fix (Carsten) > > > > > > - ktime_get* speedups (Martin) > > > > I'm getting slightly weird behavior from rt23 in an intel quad core > > machine (my T61 laptop is fine), rt22 was fine. It is some timer issue, > > if I type continuously I get (every few seconds) repeated keys. Nothing > > in the logs, nothing in dmesg that is (significantly) different from an > > rt22 boot. > > Hmm. The only change which touches timer related stuff is the ktime* > speedups. Can you please apply the revert patch below and check > whether that changes anything? If not, then we need to look at the > 2.6.29.5 -> .6 delta. The bad behavior is gone with the patch reverted. But life is not so simple :-) I rebooted into the newer kernel and the problem was gone. Then I rebooted into the older (unreverted) kernel and the problem was not there either! Sigh. Then I powered down the machine, powered up in the older kernel and the problem was there. Powered down, powered up in the newer kernel and the problem was gone. Warm boot into the older kernel and the problem is _not_ there. So it would seem there's something getting screwed up at the hardware level that the reverted patch "fixes"... When the problem happens it is very obvious. And also affects the screensaver, of course. I don't see it in my laptop and on another P4 based machine running fc11 (as opposed to fc10 in the others) and a different build. Thanks! -- Fernando -- 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/