Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S932398AbXE1VqP (ORCPT ); Mon, 28 May 2007 17:46:15 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1752749AbXE1Vp5 (ORCPT ); Mon, 28 May 2007 17:45:57 -0400 Received: from www.osadl.org ([213.239.205.134]:58937 "EHLO mail.tglx.de" rhost-flags-OK-OK-OK-FAIL) by vger.kernel.org with ESMTP id S1752349AbXE1Vpz (ORCPT ); Mon, 28 May 2007 17:45:55 -0400 Subject: Re: b44: regression in 2.6.22 (resend) From: Thomas Gleixner To: Maximilian Engelhardt Cc: Michael Buesch , linux-kernel , linux-wireless , Stephen Hemminger , Arnaldo Carvalho de Melo , Jeff Garzik , Gary Zambrano , netdev@vger.kernel.org, Andrew Morton In-Reply-To: <200705282255.56490.maxi@daemonizer.de> References: <20070525172431.60affaca@freepuppy> <200705281944.05030.maxi@daemonizer.de> <1180380230.3657.3.camel@chaos> <200705282255.56490.maxi@daemonizer.de> Content-Type: text/plain Date: Mon, 28 May 2007 23:45:52 +0200 Message-Id: <1180388752.3657.13.camel@chaos> Mime-Version: 1.0 X-Mailer: Evolution 2.10.1 (2.10.1-4.fc7) Content-Transfer-Encoding: 7bit Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 1613 Lines: 39 On Mon, 2007-05-28 at 22:55 +0200, Maximilian Engelhardt wrote: > > > I additionally built my 2.6.22-rc2-mm1 kernel without High Resolution > > > Timer, but the high ping problem is still there. > > > > Hmm, that's mysterious. Wild guess is that highres exposes the hidden > > "feature" in a different way than rc2-mm1 does. > > I think the bug in 2.6.21/22-rc3 is a different one that the one in > 2.6.22-rc2-mm1, but that's also only a wild guess :) > > I'll explain this a bit: > In 2.6.21/22-rc3 is the same b44 driver that has been in the stock kernels for > some time. With this driver and High Resolution Timer turned on I get > problems using iperf. The problems are that the systems becomes really slow > and unresponsive. Michael Buesch thought this could be an IRQ storm which > sounds logical to me. This bug did never happen to me before I startet the > iperf test. Can you please apply http://www.tglx.de/projects/hrtimers/2.6.22-rc3/patch-2.6.22-rc3-hrt1.patch on top of rc3 and check, whether it has any effect on your problem. > The other issue happens only with 2.6.22-rc2-mm1 which includes the b44 ssb > spilt. It's independed wether High Resolution Timer is turned on or off I > always get very varying and high ping times. The iperf-test doesn't show the > problems from 2.6.21/22-rc3. Neither with nor without highres ? tglx - 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/