Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1751284AbWEMP3s (ORCPT ); Sat, 13 May 2006 11:29:48 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1751321AbWEMP3s (ORCPT ); Sat, 13 May 2006 11:29:48 -0400 Received: from stat9.steeleye.com ([209.192.50.41]:10981 "EHLO hancock.sc.steeleye.com") by vger.kernel.org with ESMTP id S1751284AbWEMP3r (ORCPT ); Sat, 13 May 2006 11:29:47 -0400 Message-ID: <4465FB5C.6070808@steeleye.com> Date: Sat, 13 May 2006 11:29:32 -0400 From: Paul Clements User-Agent: Thunderbird 1.5 (X11/20051201) MIME-Version: 1.0 To: Andrew Morton CC: Neil Brown , linux-raid@vger.kernel.org, linux-kernel@vger.kernel.org Subject: Re: [PATCH 008 of 8] md/bitmap: Change md/bitmap file handling to use bmap to file blocks. References: <20060512160121.7872.patches@notabene> <1060512060809.8099@suse.de> <20060512104750.0f5cb10a.akpm@osdl.org> <17509.22160.118149.49714@cse.unsw.edu.au> <20060512235934.4f609019.akpm@osdl.org> In-Reply-To: <20060512235934.4f609019.akpm@osdl.org> Content-Type: text/plain; charset=ISO-8859-1; format=flowed Content-Transfer-Encoding: 7bit Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 722 Lines: 19 Andrew Morton wrote: > The loss of pagecache coherency seems sad. I assume there's never a > requirement for userspace to read this file. Actually, there is. mdadm reads the bitmap file, so that would be broken. Also, it's just useful for a user to be able to read the bitmap (od -x, or similar) to figure out approximately how much more he's got to resync to get an array in-sync. Other than reading the bitmap file, I don't know of any way to determine that. -- Paul - 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/