From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1754014AbYICTHI (ORCPT ); Wed, 3 Sep 2008 15:07:08 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1754417AbYICTGo (ORCPT ); Wed, 3 Sep 2008 15:06:44 -0400 Received: from perninha.conectiva.com.br ([200.140.247.100]:45839 "EHLO perninha.conectiva.com.br" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1753537AbYICTGn (ORCPT ); Wed, 3 Sep 2008 15:06:43 -0400 Date: Wed, 3 Sep 2008 16:07:05 -0300 From: "Luiz Fernando N. Capitulino" To: Thomas Gleixner Cc: Dmitry Nezhevenko , herton@mandriva.com.br, Mikhail Kshevetskiy , LKML Subject: Re: 2.6.27-rc5 doesn't boot on a Pavilion laptop Message-ID: <20080903160705.0efd7308@doriath.conectiva> In-Reply-To: References: <20080902163532.436f8fbd@doriath.conectiva> <20080902175544.131bc54e@doriath.conectiva> <20080903104132.7a736282@doriath.conectiva> <20080903164415.GA24442@laptop.local> <20080903143653.68bb58df@doriath.conectiva> Organization: Mandriva X-Mailer: Claws Mail 3.5.0 (GTK+ 2.13.7; i586-mandriva-linux-gnu) Mime-Version: 1.0 Content-Type: text/plain; charset=US-ASCII Content-Transfer-Encoding: 7bit Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Em Wed, 3 Sep 2008 20:40:55 +0200 (CEST) Thomas Gleixner escreveu: | > As the dmesg has various WARN_ON() outputs I'm attaching it, this is | > the first one: | > | > """ | > PCI: Using ACPI for IRQ routing | > DMAR:parse DMAR table failure. | > hpet0: at MMIO 0xfed00000, IRQs 2, 8, 31 | > hpet0: 3 32-bit timers, 25000000 Hz | > Switched to high resolution mode on CPU 0 | > | > tick_broadcast_set_event is stuck f09fa64 f0a01e4 | | Hmm, so we fail to force program that HPET with the standard minimum | delta. | | I now see why this is happening and it is happening only on systems | with a fast HPET. Your's running 25MHz, so the delta is only 1.92 | usec. I was staring at lots of those bugreports without noticing the | frequency. | | Sigh. The idea to take a fixed number of HPET cycles as the minimum | was not really brilliant it seems. | | Does the patch below help ? Keep the debug patch applied, as we can | see whether the check triggers or not. Yeah, it works. I have booted three times with no warnings. I will revert the debug patch and test again just to be sure, if this is of any help: Tested-by: Luiz Fernando N. Capitulino By the way, is this the definitive fix? -- Luiz Fernando N. Capitulino