Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1753396AbYANBry (ORCPT ); Sun, 13 Jan 2008 20:47:54 -0500 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1753308AbYANBrD (ORCPT ); Sun, 13 Jan 2008 20:47:03 -0500 Received: from smtp.ustc.edu.cn ([202.38.64.16]:38684 "HELO ustc.edu.cn" rhost-flags-OK-OK-OK-FAIL) by vger.kernel.org with SMTP id S1755915AbYANBrA (ORCPT ); Sun, 13 Jan 2008 20:47:00 -0500 Message-ID: <400275229.00373@ustc.edu.cn> X-EYOUMAIL-SMTPAUTH: wfg@mail.ustc.edu.cn Date: Sun, 13 Jan 2008 19:59:33 +0800 From: Fengguang Wu To: Joerg Platte Cc: Peter Zijlstra , Ingo Molnar , linux-kernel@vger.kernel.org, "linux-ext4@vger.kernel.org" Subject: Re: regression: 100% io-wait with 2.6.24-rcX References: <200801071151.11200.lists@naasa.net> <200801130905.44855.jplatte@naasa.net> <400212488.11031@ustc.edu.cn> <200801131049.33111.jplatte@naasa.net> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <200801131049.33111.jplatte@naasa.net> X-GPG-Fingerprint: 53D2 DDCE AB5C 8DC6 188B 1CB1 F766 DA34 8D8B 1C6D User-Agent: Mutt/1.5.12-2006-07-14 Message-Id: Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 1061 Lines: 32 On Sun, Jan 13, 2008 at 10:49:31AM +0100, Joerg Platte wrote: > register_jprobe(ext2_writepage) = 0 > register_jprobe(requeue_io) = 0 > register_kprobe(submit_bio) = 0 > requeue_io: > inode 114019(sda7/.kde) count 2,2 size 0 pages 1 > 0 2 0 U____ > requeue_io: > inode 114025(sda7/cache-ibm) count 2,1 size 0 pages 1 > 0 2 0 U____ > requeue_io: > inode 114029(sda7/socket-ibm) count 2,3 size 0 pages 1 > 0 2 0 U____ > requeue_io: > inode 114017(sda7/0266584877) count 3,6 size 0 pages 1 > 0 2 0 U____ It helps. Thank you, Joerg! The .kde/cache-ibm/socket-ibm/0266584877 above are directories. It's weird that dirs would have their own mappings in ext2. In particular this bug is triggered because the dir mapping page has PAGECACHE_TAG_DIRTY set and PG_dirty cleared, staying in an inconsistent state. Fengguang -- 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/