Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1755518Ab1EDTkR (ORCPT ); Wed, 4 May 2011 15:40:17 -0400 Received: from christianhoffmann.info ([88.175.101.52]:41347 "EHLO christianhoffmann.info" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1752226Ab1EDTkP (ORCPT ); Wed, 4 May 2011 15:40:15 -0400 Message-ID: <4DC1AB9B.8080501@christianhoffmann.info> Date: Wed, 04 May 2011 21:40:11 +0200 From: Christian Hoffmann User-Agent: Mozilla/5.0 (X11; U; Linux x86_64; en-US; rv:1.9.2.15) Gecko/20110419 Lightning/1.0b2 Thunderbird/3.1.9 MIME-Version: 1.0 To: Thomas Gleixner CC: john stultz , Linux Kernel Mailing List Subject: Re: Long timeout when booting >= 2.6.38 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> <4DC1832E.5030806@christianhoffmann.info> In-Reply-To: Content-Type: text/plain; charset=ISO-8859-1; format=flowed Content-Transfer-Encoding: 7bit Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 1432 Lines: 40 > > Hmm. So I really wonder why it refuses to switch to acpi_pm when you > select it on the kernel command line. > > Does "echo acpi_pm> /sys/devices/system/clocksource/clocksource0/current_clocksource" > work ? Yes, that seems to work: root@c3po:~# echo acpi_pm > /sys/devices/system/clocksource/clocksource0/current_clocksource root@c3po:~# dmesg | grep clocksource [ 0.000000] Command line: BOOT_IMAGE=/vmlinuz-2.6.39-rc5-ch+ 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+ root=/dev/mapper/vg-root ro quiet splash vt.handoff=7 clocksource=acpi_pm [ 1.463754] Switching to clocksource tsc [ 1.470700] Override clocksource acpi_pm is not HRT compatible. Cannot switch while in HRT/NOHZ mode [ 125.808622] Switching to clocksource acpi_pm > > Ok. That excludes HPET. So the only difference left is the late > registration of TSC which happens _AFTER_ the hang. > > Can you boot the non working kernel with "lpj=28098860" on the kernel > command line ? The dmesg output with lpj is here (and it still hangs): http://pastebin.com/raw.php?i=wZWrbc7Z Kind regards, Chris -- 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/