From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from relay.sgi.com (relay3.corp.sgi.com [198.149.34.15]) by oss.sgi.com (8.12.11.20060308/8.12.11/SuSE Linux 0.7) with ESMTP id mB31NWIO001916 for ; Tue, 2 Dec 2008 19:23:33 -0600 Received: from estes.americas.sgi.com (estes.americas.sgi.com [128.162.236.10]) by relay3.corp.sgi.com (Postfix) with ESMTP id D035CAC002 for ; Tue, 2 Dec 2008 17:23:28 -0800 (PST) Date: Tue, 2 Dec 2008 19:28:59 -0600 From: "Bill O'Donnell" Subject: Re: [PATCH 5/9] add support for large btree blocks with CRCs and additional RAS information Message-ID: <20081203012859.GA16811@sgi.com> References: <20080925225633.GF9822@lst.de> MIME-Version: 1.0 Content-Disposition: inline In-Reply-To: <20080925225633.GF9822@lst.de> List-Id: XFS Filesystem from SGI List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Sender: xfs-bounces@oss.sgi.com Errors-To: xfs-bounces@oss.sgi.com To: Christoph Hellwig Cc: xfs@sgi.com On Fri, Sep 26, 2008 at 12:56:33AM +0200, Christoph Hellwig wrote: | Add support for larger btree blocks that contains a CRC32C checksum, a | filesystem uuid and block number for detecting filesystem consistency | and out of place writes. The use of these blocks is triggered by the | crc superblock patches just added. | | Note that we currently do not log the crc of the block, but re-created | it during log recovery. With the pending patch to also checksum the log | this should be safe against filesystem corruption but doesn't really | follow the end to end argument. Also poking into the buffer to find | out whether this is a btree buffer during log recovery is not a very | clean way to implement this. I'll look into how well adding crcs | to the buffer log items for every btree is going to work and hope | I can switch to that variant for the next version. looks good... will need to put this through the QA wringer. -- Bill O'Donnell SGI billodo@sgi.com _______________________________________________ xfs mailing list xfs@oss.sgi.com http://oss.sgi.com/mailman/listinfo/xfs