Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1756810Ab1CAQI5 (ORCPT ); Tue, 1 Mar 2011 11:08:57 -0500 Received: from mail-fx0-f46.google.com ([209.85.161.46]:55873 "EHLO mail-fx0-f46.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1753070Ab1CAQIz (ORCPT ); Tue, 1 Mar 2011 11:08:55 -0500 DomainKey-Signature: a=rsa-sha1; c=nofws; d=gmail.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=uw5XB3nvRbU0SNI07AKGWYivjWgl+KD85uZE2DDbBPorrbHZA8sz4jLgJpgVKxxUIN 6ho3HZdF95zcu7LkkVdyFEGycT1lTx1s5GZTswjC6el77r3yahq69/qWHJkVIbZ5TZg0 Csk2od2fl0YshLMJH3Vrsc04WTMa3FgnYD/lY= Message-ID: <4D6D1A0B.3050903@gmail.com> Date: Tue, 01 Mar 2011 19:08:43 +0300 From: Cyrill Gorcunov User-Agent: Mozilla/5.0 (X11; U; Linux x86_64; en-US; rv:1.9.2.13) Gecko/20101208 Thunderbird/3.1.7 MIME-Version: 1.0 To: denys@visp.net.lb CC: Thomas Gleixner , Ingo Molnar , "H. Peter Anvin" , x86@kernel.org, linux-kernel@vger.kernel.org Subject: Re: NMI received for unknown reason, 2.6.38-rc6 regression? References: <950d04b27ce43565cdef24e4072d7e71@visp.net.lb> In-Reply-To: <950d04b27ce43565cdef24e4072d7e71@visp.net.lb> Content-Type: text/plain; charset=UTF-8; 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: 1860 Lines: 36 On 03/01/2011 06:03 PM, denys@visp.net.lb wrote: > I upgrade around 140 hosts (from 2.6.33 till 2.6.37), and got on many of them error/warining, flooding kernel log. Here is short snapshot: > > [ 1882.057474] Uhhuh. NMI received for unknown reason 3c on CPU 0. > [ 1882.057576] Do you have a strange power saving mode enabled? > [ 1882.057672] Dazed and confused, but trying to continue > [ 2421.419732] Uhhuh. NMI received for unknown reason 3c on CPU 0. > [ 2421.419835] Do you have a strange power saving mode enabled? > [ 2421.419930] Dazed and confused, but trying to continue > [ 2636.016831] Uhhuh. NMI received for unknown reason 2c on CPU 1. > [ 2636.016934] Do you have a strange power saving mode enabled? > [ 2636.017003] Dazed and confused, but trying to continue > > Full dmesg from 2 machines: > http://www.nuclearcat.com/dmesg1.txt > http://www.nuclearcat.com/dmesg2.txt > I can provide more, if required. > > It seems nmi_watchdog is enabled by default, and it is causing issue. I am checking now with nmi_watchdog=0, but i need more time to confirm that. > Also i am experiencing some problem with ppp users(all of them is pppoe servers), but i am not sure it is related to that, so maybe this NMI warning is just cosmetic regression. > > All systems is x86, same kernel config. > If you need more information - let me know. > nmi_watchdog=0 should help here, actually a nit was fixed by https://patchwork.kernel.org/patch/566611/ which is not in 2.6.38-rc6 but I rather suspect it'll be in -rc7 or final .38. If you have an ability to pickup it and test -- this would be great! -- Cyrill -- 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/