Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1752381Ab1EDIht (ORCPT ); Wed, 4 May 2011 04:37:49 -0400 Received: from www.linutronix.de ([62.245.132.108]:33293 "EHLO Galois.linutronix.de" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751966Ab1EDIhr (ORCPT ); Wed, 4 May 2011 04:37:47 -0400 Date: Wed, 4 May 2011 10:37:37 +0200 (CEST) From: Thomas Gleixner To: Christian Hoffmann cc: john stultz , Linux Kernel Mailing List Subject: Re: Long timeout when booting >= 2.6.38 In-Reply-To: <4DC100D0.1030302@christianhoffmann.info> Message-ID: References: <4DBEFCBA.3070501@christianhoffmann.info> <1304363375.3226.5.camel@work-vm> <4DBF1725.3030800@christianhoffmann.info> <1304372955.3226.15.camel@work-vm> <4DBF2FB4.8000304@christianhoffmann.info> <1304470839.3037.12.camel@work-vm> <4DC100D0.1030302@christianhoffmann.info> User-Agent: Alpine 2.02 (LFD 1266 2009-07-14) MIME-Version: 1.0 Content-Type: TEXT/PLAIN; charset=US-ASCII X-Linutronix-Spam-Score: -1.0 X-Linutronix-Spam-Level: - X-Linutronix-Spam-Status: No , -1.0 points, 5.0 required, ALL_TRUSTED=-1,SHORTCIRCUIT=-0.0001 Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 1412 Lines: 38 On Wed, 4 May 2011, Christian Hoffmann wrote: > In fact, switching to acpi_pm doesn't seem to work: > > $ dmesg | grep clock > > [ 0.000000] Command line: BOOT_IMAGE=/vmlinuz-2.6.39-rc5-ch-broken+ > root=/dev/mapper/vg-root ro quiet splash vt.handoff=7 clocksource=acpi_pm > [ 0.000000] Kernel command line: BOOT_IMAGE=/vmlinuz-2.6.39-rc5-ch-broken+ > root=/dev/mapper/vg-root ro quiet splash vt.handoff=7 clocksource=acpi_pm > [ 0.000000] hpet clockevent registered > [ 1.413835] Switching to clocksource hpet > [ 1.420762] Override clocksource acpi_pm is not HRT compatible. Cannot > switch while in HRT/NOHZ mode Huch. There is something badly wrong. Can you provide the output of cat /sys/devices/system/clocksource/clocksource0/available_clocksource please ? > [ 147.940143] Refined TSC clocksource calibration: 2809.409 MHz. > [ 147.940147] Switching to clocksource tsc I just looked at the two boot logs you provided. So the main difference is that TSC gets installed way later. Can you please boot the "working" kernel with clocksource=hpet on the commandline and verify whether the boot hang appears there as well? Thanks, 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/