From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1031125AbbEEUUq (ORCPT ); Tue, 5 May 2015 16:20:46 -0400 Received: from bombadil.infradead.org ([198.137.202.9]:34655 "EHLO bombadil.infradead.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751057AbbEEUUp (ORCPT ); Tue, 5 May 2015 16:20:45 -0400 Date: Tue, 5 May 2015 13:20:45 -0700 From: Christoph Hellwig To: Jens Axboe Cc: Christoph Hellwig , linux-kernel@vger.kernel.org, linux-fsdevel@vger.kernel.org, adilger@dilger.ca, david@fromorbit.com Subject: Re: [PATCH v2] Support for write stream IDs Message-ID: <20150505202045.GA25695@infradead.org> References: <1430856181-19568-1-git-send-email-axboe@fb.com> <20150505200757.GA23902@infradead.org> <55492411.1010806@fb.com> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <55492411.1010806@fb.com> User-Agent: Mutt/1.5.23 (2014-03-12) X-SRS-Rewrite: SMTP reverse-path rewritten from by bombadil.infradead.org See http://www.infradead.org/rpr.html Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On Tue, May 05, 2015 at 02:12:01PM -0600, Jens Axboe wrote: > We can't merge the NVMe bits until the proposal is included/finalized. But > this is a problem. I don't want to add this to the Facebook kernel until we > know the API is stable, while I have no problem adding experimental NVMe > changes since those can be easily updated without impacting applications. > The latter is not true for the user interface. They might never be finalized, and even if they are mere mortals might never get this hardware. Merging infrastructure without any users is a bad idea in general, and merging infrastructure with no user that exposes untestable user interface and bloats core data structures is even worse. I don't think this has any merit at all at this point.