From: Alasdair G Kergon Subject: Re: [dm-devel] Ext4 and xfs problems in dm-thin on allocation and discard Date: Tue, 19 Jun 2012 15:43:16 +0100 Message-ID: <20120619144316.GD14208@agk-dp.fab.redhat.com> References: <4FDF9EBE.2030809@shiftmail.org> <20120619141933.GC10637@thunk.org> Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii Cc: =?utf-8?B?THVrw6HFoQ==?= Czerner , linux-ext4@vger.kernel.org, xfs@oss.sgi.com, Spelic To: device-mapper development Return-path: Received: from mx1.redhat.com ([209.132.183.28]:1026 "EHLO mx1.redhat.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1754409Ab2FSOnZ (ORCPT ); Tue, 19 Jun 2012 10:43:25 -0400 Content-Disposition: inline In-Reply-To: <20120619141933.GC10637@thunk.org> Sender: linux-ext4-owner@vger.kernel.org List-ID: On Tue, Jun 19, 2012 at 10:19:33AM -0400, Ted Ts'o wrote: > One of the things which would be nice to be able to easily set up is a > configuration where we get the benefits of thin provisioning with > respect to snapshost, but where the underlying block device used by > the file system is contiguous. We're tracking this requirement (for lvm2) here: https://bugzilla.redhat.com/show_bug.cgi?id=814737 Alasdair