Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1757893Ab1DHURR (ORCPT ); Fri, 8 Apr 2011 16:17:17 -0400 Received: from zeniv.linux.org.uk ([195.92.253.2]:41743 "EHLO ZenIV.linux.org.uk" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1757877Ab1DHURQ (ORCPT ); Fri, 8 Apr 2011 16:17:16 -0400 Date: Fri, 8 Apr 2011 13:17:04 -0700 From: Joel Becker To: Mingming Cao Cc: djwong@us.ibm.com, "Theodore Ts'o" , Andreas Dilger , linux-ext4 , linux-kernel Subject: Re: [PATCH 0/2] Add inode checksum support to ext4 Message-ID: <20110408201703.GC17677@noexit> Mail-Followup-To: Mingming Cao , djwong@us.ibm.com, Theodore Ts'o , Andreas Dilger , linux-ext4 , linux-kernel References: <20110406224410.GB24354@tux1.beaverton.ibm.com> <1302290868.4461.7.camel@mingming-laptop> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <1302290868.4461.7.camel@mingming-laptop> X-Burt-Line: Trees are cool. X-Red-Smith: Ninety feet between bases is perhaps as close as man has ever come to perfection. User-Agent: Mutt/1.5.20 (2009-06-14) Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 865 Lines: 24 On Fri, Apr 08, 2011 at 12:27:48PM -0700, Mingming Cao wrote: > We had some discussion about this week at SF (at the ext4 bof at the > linux colloboration summit). Beyond checksumming the inode itself, it > would be more useful to checksum the extent indexing blocks, as the ext3 > corruption actually happen at the indirect block. You want to checksum all metadata. ocfs2 takes advantage of this because we can just EIO any bad metadata and continue to serve the rest of the filesystem. Joel -- "Time is an illusion, lunchtime doubly so." -Douglas Adams http://www.jlbec.org/ jlbec@evilplan.org -- 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/