From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1760279AbXGOKV4 (ORCPT ); Sun, 15 Jul 2007 06:21:56 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1756864AbXGOKVr (ORCPT ); Sun, 15 Jul 2007 06:21:47 -0400 Received: from pentafluge.infradead.org ([213.146.154.40]:36784 "EHLO pentafluge.infradead.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1757587AbXGOKVp (ORCPT ); Sun, 15 Jul 2007 06:21:45 -0400 Subject: Re: [EXT4 set 5][PATCH 1/1] expand inode i_extra_isize to support features in larger inode From: Peter Zijlstra To: Zach Brown Cc: Andrew Morton , cmm@us.ibm.com, linux-fsdevel@vger.kernel.org, linux-kernel@vger.kernel.org, linux-ext4@vger.kernel.org, Andy Whitcroft In-Reply-To: <20070713214746.GH23255@mami.zabbo.net> References: <1183275482.4010.133.camel@localhost.localdomain> <20070710163247.5c8bfa3f.akpm@linux-foundation.org> <20070713020529.1486491f.akpm@linux-foundation.org> <1184333621.20032.85.camel@twins> <20070713121259.20066d5b.akpm@linux-foundation.org> <20070713214746.GH23255@mami.zabbo.net> Content-Type: text/plain Date: Sun, 15 Jul 2007 12:21:21 +0200 Message-Id: <1184494881.5284.92.camel@lappy> Mime-Version: 1.0 X-Mailer: Evolution 2.10.1 Content-Transfer-Encoding: 7bit Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org On Fri, 2007-07-13 at 14:47 -0700, Zach Brown wrote: > Peter, do you have any interest in seeing how far we can get > at tracking lock_page()? I'm not holding my breath, but any little bit > would probably help. I ran headfirst into the fact the unlock_page() need not be called by the same task that did lock_page(). Esp IO-completion interrupts love to unlock pages they did not lock themselves. Not at all sure that is fixable, it seems to be the nature of the async structure of the problem :-(