From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1752093AbaCYDaZ (ORCPT ); Mon, 24 Mar 2014 23:30:25 -0400 Received: from mail-yh0-f52.google.com ([209.85.213.52]:34311 "EHLO mail-yh0-f52.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751957AbaCYDaX (ORCPT ); Mon, 24 Mar 2014 23:30:23 -0400 Message-ID: <5330F84C.8090803@bjorling.me> Date: Mon, 24 Mar 2014 20:30:20 -0700 From: Matias Bjorling User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:24.0) Gecko/20100101 Thunderbird/24.3.0 MIME-Version: 1.0 To: Bart Van Assche , device-mapper development CC: snitzer@redhat.com, linux-kernel@vger.kernel.org, linux-fsdevel@vger.kernel.org, agk@redhat.com, Takashi HOSHINO Subject: Re: [dm-devel] [PATCH RFC v1 01/01] dm-lightnvm: An open FTL for open firmware SSDs References: <1395383538-18019-1-git-send-email-m@bjorling.me> <1395383538-18019-2-git-send-email-m@bjorling.me> <20140321153749.GA17155@infradead.org> <532FCCFB.7010007@acm.org> In-Reply-To: <532FCCFB.7010007@acm.org> Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 7bit Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On 03/23/2014 11:13 PM, Bart Van Assche wrote: > On 03/21/14 16:37, Christoph Hellwig wrote: >> Just curious: why do you think implementing this as a block remapper >> inside device mapper is a better idea than as a blk-mq driver? >> >> At the request layer you already get a lot of infrastructure for all the >> queueing infrastructure for free, as well as all kinds of other helpers. >> And the driver never remaps bios anyway but always submits new ones as >> far as I can tell. >> >> Does it even make sense to expose the underlying devices as block >> devices? It surely would help to send this together with a driver >> that you plan to use it on top of. > > There might be some overlap between the functionality available in the > lightnvm driver and the WalB driver announced last year. That last > driver might have a wider user base and hence may have received more > testing. See also http://thread.gmane.org/gmane.linux.file-systems/75124. > Hi Bart, Thanks! There seems to be a little bit that can be reused. It does seem from the github page that there haven't been any development since its been posted. Maybe the development is moved elsewhere? > Bart. >