Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1755775AbYANDzK (ORCPT ); Sun, 13 Jan 2008 22:55:10 -0500 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1754400AbYANDy6 (ORCPT ); Sun, 13 Jan 2008 22:54:58 -0500 Received: from smtp.ustc.edu.cn ([202.38.64.16]:34783 "HELO ustc.edu.cn" rhost-flags-OK-OK-OK-FAIL) by vger.kernel.org with SMTP id S1754290AbYANDy5 (ORCPT ); Sun, 13 Jan 2008 22:54:57 -0500 Message-ID: <400282904.32255@ustc.edu.cn> X-EYOUMAIL-SMTPAUTH: wfg@mail.ustc.edu.cn Date: Mon, 14 Jan 2008 11:54:39 +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> <20080113115933.GA11045@mail.ustc.edu.cn> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20080113115933.GA11045@mail.ustc.edu.cn> 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: 1339 Lines: 37 On Sun, Jan 13, 2008 at 07:59:33PM +0800, Fengguang Wu wrote: > 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 Oh, ext2 dirs have their own mapping pages. Not the same with ext3. > particular this bug is triggered because the dir mapping page has > PAGECACHE_TAG_DIRTY set and PG_dirty cleared, staying in an > inconsistent state. Just found that a deleted dir will enter that inconsistent state when someone still have reference to it... -- 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/