Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S932290AbWAUAOE (ORCPT ); Fri, 20 Jan 2006 19:14:04 -0500 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S932292AbWAUAOE (ORCPT ); Fri, 20 Jan 2006 19:14:04 -0500 Received: from gate.in-addr.de ([212.8.193.158]:14223 "EHLO mx.in-addr.de") by vger.kernel.org with ESMTP id S932293AbWAUAOC (ORCPT ); Fri, 20 Jan 2006 19:14:02 -0500 Date: Sat, 21 Jan 2006 01:13:11 +0100 From: Lars Marowsky-Bree To: Heinz Mauelshagen Cc: Neil Brown , Phillip Susi , Jan Engelhardt , "Lincoln Dale (ltd)" , Michael Tokarev , linux-raid@vger.kernel.org, linux-kernel@vger.kernel.org, "Steinar H. Gunderson" Subject: Re: [PATCH 000 of 5] md: Introduction Message-ID: <20060121001311.GA22163@marowsky-bree.de> References: <17358.52476.290687.858954@cse.unsw.edu.au> <43D00FFA.1040401@cfl.rr.com> <17360.5011.975665.371008@cse.unsw.edu.au> <43D02033.4070008@cfl.rr.com> <17360.9233.215291.380922@cse.unsw.edu.au> <20060120183621.GA2799@redhat.com> <20060120225724.GW22163@marowsky-bree.de> <20060121000142.GR2801@redhat.com> <20060121000344.GY22163@marowsky-bree.de> <20060121000806.GT2801@redhat.com> Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20060121000806.GT2801@redhat.com> X-Ctuhulu: HASTUR User-Agent: Mutt/1.5.9i Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 966 Lines: 26 On 2006-01-21T01:08:06, Heinz Mauelshagen wrote: > > A dm-md wrapper would give you the same? > No, we'ld need to stack more complex to achieve mappings. > Think lvm2 and logical volume level raid5. How would you not get that if you had a wrapper around md which made it into an dm personality/target? Besides, stacking between dm devices so far (ie, if I look how kpartx does it, or LVM2 on top of MPIO etc, which works just fine) is via the block device layer anyway - and nothing stops you from putting md on top of LVM2 LVs either. I use the regularly to play with md and other stuff... So I remain unconvinced that code duplication is worth it for more than "hark we want it so!" ;-) - 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/