Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1756005AbYBYQ5I (ORCPT ); Mon, 25 Feb 2008 11:57:08 -0500 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1750748AbYBYQ44 (ORCPT ); Mon, 25 Feb 2008 11:56:56 -0500 Received: from ug-out-1314.google.com ([66.249.92.175]:22974 "EHLO ug-out-1314.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1750706AbYBYQ4z (ORCPT ); Mon, 25 Feb 2008 11:56:55 -0500 DomainKey-Signature: a=rsa-sha1; c=nofws; d=googlemail.com; s=gamma; h=message-id:date:from:user-agent:mime-version:to:cc:subject:references:in-reply-to:content-type:content-transfer-encoding; b=TNXWR3iIrcmuT/7sQnERslWOAY90DMQUzWzoBVpY37/k4ovrGpw78TjbO5lkiRFCMaCCVKFz2mFTzg7JcOfhbnRGK9VXMa6AQtWYAxo+WR1+wtNRQC3+AZvvXiLn/wwn4tfs8TWpscdbBaY3nOgpYfB0Innh3GtSkDJZSyF9Vu4= Message-ID: <47C2F350.1060107@googlemail.com> Date: Mon, 25 Feb 2008 17:56:48 +0100 From: Gabriel C User-Agent: Thunderbird 2.0.0.9 (X11/20071204) MIME-Version: 1.0 To: Thomas Gleixner CC: Robert Hancock , Linux Kernel Mailing List , Gabriel C Subject: Re: Clocksource tsc is always unstable with 2.6.25-* kernels and CONFIG_NO_HZ=y on my box References: <47C24517.7010204@shaw.ca> In-Reply-To: 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 Content-Length: 1561 Lines: 56 Thomas Gleixner wrote: > On Sun, 24 Feb 2008, Robert Hancock wrote: >> Gabriel C wrote: >>> Hi, >>> >>> I noticed tsc is always marked unstable on my box with 2.6.25* , 2.6.24 is >>> fine. >>> >>> .. >>> >>> [ 0.825760] ACPI: PCI Interrupt 0000:03:0e.0[A] -> GSI 22 (level, low) -> >>> IRQ 22 >>> [ 0.805755] Switched to high resolution mode on CPU 1 >>> [ 0.794244] Switched to high resolution mode on CPU 2 >>> [ 0.766968] Switched to high resolution mode on CPU 3 >>> [ 1.083944] Switched to high resolution mode on CPU 0 >>> [ 15.388792] Clocksource tsc unstable (delta = 9373391604 ns) > > Doh, this looks like the acpi_pm timer is not working at all. > >>> [ 15.714648] Time: acpi_pm clocksource has been installed. >>> .. >>> >>> Booting nohz=off fixes that. >>> >>> Another strange thing is when I try to boot that kernel with >>> clocksource=acpi_pm it just hangs. > > Which confirms the above. > >>> config is attached. >>> >>> Please let me know if you need more infos / want me to try patches or >>> anything else. >> Please post your full dmesg output. > > Yes please. dmesg's from 2.6.25-rc3 witch nohz={on,off} , lspci , dmidecode and the used config for this kernel can be found there : http://frugalware.org/~crazy/dmesg/lara/ > > Thanks, > tglx > Regards, Gabriel -- 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/