Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1760042AbXKDNkz (ORCPT ); Sun, 4 Nov 2007 08:40:55 -0500 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1756409AbXKDNkq (ORCPT ); Sun, 4 Nov 2007 08:40:46 -0500 Received: from rayleigh.systella.fr ([213.41.184.253]:56922 "EHLO rayleigh.systella.fr" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1755803AbXKDNkp (ORCPT ); Sun, 4 Nov 2007 08:40:45 -0500 Message-ID: <472DCBBB.1040806@systella.fr> Date: Sun, 04 Nov 2007 14:40:11 +0100 From: =?ISO-8859-1?Q?BERTRAND_Jo=EBl?= User-Agent: Mozilla/5.0 (X11; U; Linux sparc64; fr-FR; rv:1.8.1.6) Gecko/20070802 Iceape/1.1.4 (Debian-1.1.4-1) MIME-Version: 1.0 To: Justin Piszcz CC: linux-kernel@vger.kernel.org, linux-raid@vger.kernel.org Subject: Re: 2.6.23.1: mdadm/raid5 hung/d-state References: In-Reply-To: Content-Type: text/plain; charset=ISO-8859-1; format=flowed Content-Transfer-Encoding: 7bit X-Greylist: Sender succeeded SMTP AUTH, not delayed by milter-greylist-3.1.8 (rayleigh.systella.fr [192.168.254.1]); Sun, 04 Nov 2007 14:40:19 +0100 (CET) Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 1123 Lines: 25 Justin Piszcz wrote: > # ps auxww | grep D > USER PID %CPU %MEM VSZ RSS TTY STAT START TIME COMMAND > root 273 0.0 0.0 0 0 ? D Oct21 14:40 [pdflush] > root 274 0.0 0.0 0 0 ? D Oct21 13:00 [pdflush] > > After several days/weeks, this is the second time this has happened, > while doing regular file I/O (decompressing a file), everything on the > device went into D-state. Same observation here (kernel 2.6.23). I can see this bug when I try to synchronize a raid1 volume over iSCSI (each element is a raid5 volume), or sometimes only with a 1,5 TB raid5 volume. When this bug occurs, md subsystem eats 100% of one CPU and pdflush remains in D state too. What is your architecture ? I use two 32-threads T1000 (sparc64), and I'm trying to determine if this bug is arch specific. Regards, JKB - 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/