From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1753325AbZC0Va3 (ORCPT ); Fri, 27 Mar 2009 17:30:29 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1751434AbZC0VaV (ORCPT ); Fri, 27 Mar 2009 17:30:21 -0400 Received: from mail-bw0-f169.google.com ([209.85.218.169]:63198 "EHLO mail-bw0-f169.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1750863AbZC0VaU (ORCPT ); Fri, 27 Mar 2009 17:30:20 -0400 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:x-enigmail-version:content-type :content-transfer-encoding; b=ZgnpncpzqJ3FuW/pATE8tvsummIsKLSC6xwwGvXoQ7elQgIWMwJx6voQhdHHrW3Eok qDoKULIz6R00c2We0b/D+mN7EmU/LCZgMnyXdJhez0Ns5ialWUkO8yfmMVXJ8V9hpgFZ aOtwDXz0fAiTLsvQDuxUgRgpwbGBz/tJGHgJ8= Message-ID: <49CD4565.2090509@gmail.com> Date: Fri, 27 Mar 2009 22:30:13 +0100 From: Jiri Slaby User-Agent: Mozilla/5.0 (X11; U; Linux x86_64; cs-CZ; rv:1.9.1b3pre) Gecko/20090223 SUSE/3.0b2-8.1 Thunderbird/3.0b2 MIME-Version: 1.0 To: Fabio Coatti CC: linux-kernel@vger.kernel.org Subject: Re: server lockups - task blocked for more than 120 seconds References: <200903261543.35383.cova@ferrara.linux.it> In-Reply-To: <200903261543.35383.cova@ferrara.linux.it> X-Enigmail-Version: 0.96a Content-Type: text/plain; charset=ISO-8859-1 Content-Transfer-Encoding: 7bit Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On 03/26/2009 03:43 PM, Fabio Coatti wrote: > Hi all, as we are experiencing several lockups on productions servers, we > activated some kernel debug options in order to look into causes. One thing > that we have found on kernel log is the message " task blocked for more than > 120 seconds", just before the lockup.I don't know if this is a symptom useful Hmm, could you try to turn on LOCKDEP?