From mboxrd@z Thu Jan 1 00:00:00 1970 From: Dave Chinner Subject: [ANNOUNCE] xfs: Supporting Host Aware SMR Drives Date: Mon, 16 Mar 2015 17:00:20 +1100 Message-ID: <20150316060020.GB28557@dastard> Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii Cc: linux-fsdevel@vger.kernel.org To: xfs@oss.sgi.com Return-path: Received: from ipmail04.adl6.internode.on.net ([150.101.137.141]:54832 "EHLO ipmail04.adl6.internode.on.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1750844AbbCPGAY (ORCPT ); Mon, 16 Mar 2015 02:00:24 -0400 Content-Disposition: inline Sender: linux-fsdevel-owner@vger.kernel.org List-ID: Hi Folks, As I told many people at Vault last week, I wrote a document outlining how we should modify the on-disk structures of XFS to support host aware SMR drives on the (long) plane flights to Boston. TL;DR: not a lot of change to the XFS kernel code is required, no specific SMR awareness is needed by the kernel code. Only relatively minor tweaks to the on-disk format will be needed and most of the userspace changes are relatively straight forward, too. The source for that document can be found in this git tree here: git://git.kernel.org/pub/scm/fs/xfs/xfs-documentation in the file design/xfs-smr-structure.asciidoc. Alternatively, pull it straight from cgit: https://git.kernel.org/cgit/fs/xfs/xfs-documentation.git/tree/design/xfs-smr-structure.asciidoc Or there is a pdf version built from the current TOT on the xfs.org wiki here: http://xfs.org/index.php/Host_Aware_SMR_architecture Happy reading! Cheers, Dave. -- Dave Chinner david@fromorbit.com