From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S964977AbaCUQnA (ORCPT ); Fri, 21 Mar 2014 12:43:00 -0400 Received: from mail-pb0-f42.google.com ([209.85.160.42]:46514 "EHLO mail-pb0-f42.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1760765AbaCUQm5 (ORCPT ); Fri, 21 Mar 2014 12:42:57 -0400 Message-ID: <532C6C0E.3040608@bjorling.me> Date: Fri, 21 Mar 2014 09:42:54 -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: Richard Weinberger CC: snitzer@redhat.com, agk@redhat.com, dm-devel@redhat.com, NeilBrown , linux-fsdevel , LKML Subject: Re: [PATCH RFC v1 00/01] dm-lightnvm introduction References: <1395383538-18019-1-git-send-email-m@bjorling.me> In-Reply-To: Content-Type: text/plain; charset=ISO-8859-1 Content-Transfer-Encoding: 8bit Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On 03/21/2014 08:32 AM, Richard Weinberger wrote: > On Fri, Mar 21, 2014 at 7:32 AM, Matias Bjørling wrote: > > This sounds very interesting! > > Is there also a way to expose the flash directly as MTD device? > I'm thinking of UBI. Maybe both projects can benefit from each others. > Hi Richard, Yes, mostly. It's different from MTD, in that all flash is exposed through a linear address space, from which the FTL is layered on top. This allows the device to still do some work, such as ECC, RAID, etc. if it choose to, but also allows the host to do it. I think UBI could be a good choice for maintaining each of the flash "partitions" as there's a lot of small subtle details that have to be taken care of. - Matias