From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1757877AbYDGMEQ (ORCPT ); Mon, 7 Apr 2008 08:04:16 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1755048AbYDGMED (ORCPT ); Mon, 7 Apr 2008 08:04:03 -0400 Received: from hpsmtp-eml11.kpnxchange.com ([213.75.38.111]:44829 "EHLO hpsmtp-eml11.kpnxchange.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1754450AbYDGMED (ORCPT ); Mon, 7 Apr 2008 08:04:03 -0400 From: Frans Pop To: linux-kernel@vger.kernel.org Subject: Re: [rc8] Regression: key repeats and skips in music during compilation Date: Mon, 7 Apr 2008 14:03:58 +0200 User-Agent: KMail/1.9.9 Cc: Dhaval Giani , "Rafael J. Wysocki" , Ingo Molnar , Srivatsa Vaddagiri , Peter Zijlstra References: <200804041222.35025.elendil@planet.nl> <200804071229.27113.rjw@sisk.pl> <20080407112459.GA11532@linux.vnet.ibm.com> In-Reply-To: <20080407112459.GA11532@linux.vnet.ibm.com> MIME-Version: 1.0 Content-Type: text/plain; charset="iso-8859-1" Content-Transfer-Encoding: 7bit Content-Disposition: inline Message-Id: <200804071403.59500.elendil@planet.nl> X-OriginalArrivalTime: 07 Apr 2008 12:04:00.0209 (UTC) FILETIME=[76EA5C10:01C898A7] Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org 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? Cheers, FJP # CONFIG_CGROUPS is not set # CONFIG_GROUP_SCHED is not set (config otherwise identical to my initial mail)