From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S932203AbXCVNmi (ORCPT ); Thu, 22 Mar 2007 09:42:38 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S932370AbXCVNmh (ORCPT ); Thu, 22 Mar 2007 09:42:37 -0400 Received: from mailout.stusta.mhn.de ([141.84.69.5]:37944 "EHLO mailhub.stusta.mhn.de" rhost-flags-OK-OK-OK-FAIL) by vger.kernel.org with ESMTP id S932203AbXCVNmg (ORCPT ); Thu, 22 Mar 2007 09:42:36 -0400 Date: Thu, 22 Mar 2007 14:42:38 +0100 From: Adrian Bunk To: Ray Lee Cc: LKML , Thomas Gleixner , Ingo Molnar , john stultz , Len Brown , Andi Kleen , linux-acpi@vger.kernel.org Subject: Re: 2.6.21-rc[123] regression with NOAPIC Message-ID: <20070322134238.GY752@stusta.de> References: <4601573A.8070602@madrabbit.org> MIME-Version: 1.0 Content-Type: text/plain; charset=utf-8 Content-Disposition: inline In-Reply-To: <4601573A.8070602@madrabbit.org> User-Agent: Mutt/1.5.13 (2006-08-11) Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org On Wed, Mar 21, 2007 at 09:03:06AM -0700, Ray Lee wrote: > Hey Thomas, Ingo, et al. > > I'm having a problem, and tracked it down to what looks like a harmless > commit of yours. I didn't quite believe the bisect at first, so tested > it multiple times. > > The original problem report, when I boot with NOAPIC on the command line > on my x86_64 box, the boot hangs and the system is totally unresponsive: > > > For me, this is a minor regression as I no longer need to boot with > > NOAPIC, it just happened to still be the default when I tried 2.6.21-rc3. > > > > During boot, the computer wedges, hard. It's unresponsive to SysRq > > combos, or ctrl-alt-del, but the fan kicks in pretty quickly, so I'm > > guessing the CPU is still going wild. > > > > The boot locks right before, or during, or immediately after the ** line > > below: > > > > [ 15.020037] ACPI: CPU0 (power states: C1[C1] C3[C3]) > > ** [ 15.020221] ACPI: Processor [C000] (supports 8 throttling states) > > [ 15.036059] ACPI: Thermal Zone [TZ1] (66 C) > > [ 15.041893] ACPI: Thermal Zone [TZ2] (53 C) > > [ 15.051285] ACPI: Thermal Zone [TZ3] (33 C) > > [ 15.054922] ACPI: Thermal Zone [TZ4] (34 C) > > > > This is an x86-64 system, HP/Compaq nx6125, ATI chipset (sigh). Booting > > with NOAPIC worked in 2.6.20, fails in 2.6.21-rc1 (and 2, and 3). > (& UP, not compiled for SMP.) > > Starting with head as of yesterday and reverting two commits (that are > duplicates of each other -- the same commit came into Linus's tree via > two different paths) 'fixes' the problem for me. I'll let those with the > big brains decide just why. > > The two commits are 5c95d3f5783ab184f64b7848f0a871352c35c3cf and > 3434933b17fa64adddf83059603c61296f6e1ee2 . The net reverse diff of those > two is below. >... Thanks for tracking it down. It's quite possible that these commits trigger your problem. Does it work if you do _not_ revert the commits, and instead replace in drivers/acpi/processor_idle.c the #ifdef ARCH_APICTIMER_STOPS_ON_C3 with an #if 0 ? > Ray >... cu Adrian -- "Is there not promise of rain?" Ling Tan asked suddenly out of the darkness. There had been need of rain for many days. "Only a promise," Lao Er said. Pearl S. Buck - Dragon Seed