From mboxrd@z Thu Jan 1 00:00:00 1970 From: Matias Bjorling Subject: Re: [PATCH 1/5 v2] blk-mq: Add prep/unprep support Date: Sun, 19 Apr 2015 20:12:58 +0200 Message-ID: <5533F02A.6020208@bjorling.me> References: <1429101284-19490-1-git-send-email-m@bjorling.me> <1429101284-19490-2-git-send-email-m@bjorling.me> <20150417063439.GB389@infradead.org> <5530C132.30107@bjorling.me> <20150417174630.GA10249@infradead.org> <5531FD7F.8070809@bjorling.me> <20150418201610.GB20311@infradead.org> Mime-Version: 1.0 Content-Type: text/plain; charset=windows-1252; format=flowed Content-Transfer-Encoding: 7bit Cc: keith.busch@intel.com, javier@paletta.io, linux-kernel@vger.kernel.org, linux-nvme@lists.infradead.org, axboe@fb.com, linux-fsdevel@vger.kernel.org To: Christoph Hellwig Return-path: Received: from mail-la0-f50.google.com ([209.85.215.50]:35489 "EHLO mail-la0-f50.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751764AbbDSSND (ORCPT ); Sun, 19 Apr 2015 14:13:03 -0400 Received: by labbd9 with SMTP id bd9so112122152lab.2 for ; Sun, 19 Apr 2015 11:13:01 -0700 (PDT) In-Reply-To: <20150418201610.GB20311@infradead.org> Sender: linux-fsdevel-owner@vger.kernel.org List-ID: > On Sat, Apr 18, 2015 at 08:45:19AM +0200, Matias Bjorling wrote: >> The reason it shouldn't be under the a single block device, is that a target >> should be able to provide a global address space. >> That allows the address >> space to grow/shrink dynamically with the disks. Allowing a continuously >> growing address space, where disks can be added/removed as requirements grow >> or flash ages. Not on a sector level, but on a flash block level. > > I don't understand what you mean with a single block device here, but I > suspect we're talking past each other somehow. Sorry. I meant that several block devices should form a single address space (exposed as a single block device), consisting of all the flash blocks. Applications could then get/put from that. Thanks for your feedback. I'll push the pieces around and make the integration self-contained outside of the block layer.