From: Holger Kiehl Subject: Re: Performance of ext4 Date: Thu, 12 Jun 2008 19:50:35 +0000 (GMT) Message-ID: References: <20080611105945.GB9008@skywalker> <18563.1213215457@alphaville.zko.hp.com> <18513.345.553912.449710@frecb006361.adech.frec.bull.fr> <20080612131928.GB18229@mit.edu> <20080612180605.GD22481@skywalker> Mime-Version: 1.0 Content-Type: TEXT/PLAIN; charset=US-ASCII; format=flowed Cc: Theodore Tso , Solofo.Ramangalahy@bull.net, Nick Dokos , linux-ext4@vger.kernel.org, linux-kernel To: "Aneesh Kumar K.V" Return-path: Received: from dwdmx4.dwd.de ([141.38.3.230]:59606 "EHLO dwdmx4.dwd.de" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1754346AbYFLTun (ORCPT ); Thu, 12 Jun 2008 15:50:43 -0400 Received: from localhost (localhost [127.0.0.1]) by node5.dwd.de (Postfix) with ESMTP id 46F3A3303F6 for ; Thu, 12 Jun 2008 19:50:42 +0000 (UTC) Received: from localhost ([127.0.0.1]) by localhost (node5.csg-cluster.lan [127.0.0.1]) (amavisd-new, port 2525) with SMTP id 09896-64 for ; Thu, 12 Jun 2008 19:50:42 +0000 (UTC) In-Reply-To: <20080612180605.GD22481@skywalker> Sender: linux-ext4-owner@vger.kernel.org List-ID: On Thu, 12 Jun 2008, Aneesh Kumar K.V wrote: > On Thu, Jun 12, 2008 at 02:07:30PM +0000, Holger Kiehl wrote: >> This time there is no OOPS and system is still up running without any >> problem (except any process wanting to write something to this filesystem >> gets stuck forever). >> >> What can I do to help find the problem? The system is still up with all those >> process hanging in D-state. >> > > if you can login to the system get the dmesg output after > > echo t > /proc/sysrq-trigger > Unfortunately I have not set CONFIG_MAGIC_SYSRQ. Tomorrow I will try to reproduce this with a kernel that has CONFIG_MAGIC_SYSRQ set. Holger