From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1758007AbYDGMZk (ORCPT ); Mon, 7 Apr 2008 08:25:40 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1754086AbYDGMZa (ORCPT ); Mon, 7 Apr 2008 08:25:30 -0400 Received: from viefep18-int.chello.at ([213.46.255.22]:15684 "EHLO viefep14-int.chello.at" rhost-flags-OK-OK-OK-FAIL) by vger.kernel.org with ESMTP id S1753842AbYDGMZa (ORCPT ); Mon, 7 Apr 2008 08:25:30 -0400 Subject: Re: [rc8] Regression: key repeats and skips in music during compilation From: Peter Zijlstra To: Frans Pop Cc: linux-kernel@vger.kernel.org, Dhaval Giani , "Rafael J. Wysocki" , Ingo Molnar , Srivatsa Vaddagiri In-Reply-To: <200804071403.59500.elendil@planet.nl> References: <200804041222.35025.elendil@planet.nl> <200804071229.27113.rjw@sisk.pl> <20080407112459.GA11532@linux.vnet.ibm.com> <200804071403.59500.elendil@planet.nl> Content-Type: text/plain Date: Mon, 07 Apr 2008 14:25:15 +0200 Message-Id: <1207571115.15579.26.camel@twins> Mime-Version: 1.0 X-Mailer: Evolution 2.22.0 Content-Transfer-Encoding: 7bit Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On Mon, 2008-04-07 at 14:03 +0200, Frans Pop wrote: > On Monday 07 April 2008, Dhaval Giani wrote: > > On Mon, Apr 07, 2008 at 12:29:26PM +0200, Rafael J. Wysocki wrote: > > > On Monday, 7 of April 2008, Frans Pop wrote: > > > > On Monday 07 April 2008, Rafael J. Wysocki wrote: > > > > > On Sunday, 6 of April 2008, Rafael J. Wysocki wrote: > > > > > > On Friday, 4 of April 2008, Frans Pop wrote: > > > > > > > While compiling glibc I am getting frequent short skips in > > > > > > > music play anddddddddddddddddd I have now three times seen key > > > > > > > repeats (as in this sentence). When there is a skip in the > > > > > > > music, there is also a delay in characters being typed > > > > > > > appearing on the screen. > > > > > > > > > > > > Can you test with CONFIG_GROUP_SCHED unset, please? > > > > > > > > > > I was able to reproduce this issue with -rc8 on one of my test > > > > > systems, > > > > > > > > In the mean time I have verified that the issue also existed in rc6, > > > > so it's not a recent regression. > > > > > > > > > but I'm not any more with the current Linus' tree and > > > > > CONFIG_GROUP_SCHED unset, FWIW. > > > > > > > > Hmm. Does that mean that you _can_ reproduce it with git HEAD and > > > > CONFIG_GROUP_SCHED set? That would mean it is still an issue in HEAD > > > > and group scheduling is the culprit. > > > > > > Well, CONFIG_GROUP_SCHED is known to cause problems, AFAICS, and some > > > fixes are scheduled for the 2.6.26 time frame. > > > > I thought we had most of the issues ironed out. > > Note that I can also reproduce the issue with a kernel that does *not* have > CONFIG_GROUP_SCHED set. I still get the music skips (maybe less frequently, > but that's hard to measure), and I've have also seen key repeats once. > > Anything I can do to provide additional info on this? Could you try -rc5 !GROUP ?