From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S934195AbcIOM17 (ORCPT ); Thu, 15 Sep 2016 08:27:59 -0400 Received: from bombadil.infradead.org ([198.137.202.9]:33175 "EHLO bombadil.infradead.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S933940AbcIOM14 (ORCPT ); Thu, 15 Sep 2016 08:27:56 -0400 Date: Thu, 15 Sep 2016 05:27:53 -0700 From: Christoph Hellwig To: Wouter Verhelst Cc: Christoph Hellwig , "nbd-general@lists.sourceforge.net" , linux-block@vger.kernel.org, Josef Bacik , "linux-kernel@vger.kernel.org" , Markus Pargmann , kernel-team@fb.com Subject: Re: [Nbd] [RESEND][PATCH 0/5] nbd improvements Message-ID: <20160915122753.GA26310@infradead.org> References: <20160909200203.phhvodsfs7ymukfp@grep.be> <20160915104935.ohuwgq2chsedz6fl@grep.be> <27B346AF-F144-4770-BE38-446A66E71326@alex.org.uk> <20160915112936.vb7zxe7k6rvczosg@grep.be> <20160915114005.GC23259@infradead.org> <20160915115217.GB6411@infradead.org> <20160915120159.2o5lb7rvkjndzayh@grep.be> <20160915122008.GB1155@infradead.org> <20160915122631.7wus5o6qin6o7uz5@grep.be> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20160915122631.7wus5o6qin6o7uz5@grep.be> User-Agent: Mutt/1.6.1 (2016-04-27) 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 Thu, Sep 15, 2016 at 02:26:31PM +0200, Wouter Verhelst wrote: > Yes. I think the kernel nbd driver should probably filter out FUA on > READ. It has no meaning in the case of nbd, and whatever expectations > the kernel may have cannot be provided for by nbd anyway. The kernel never sets FUA on reads - I just pointed out that other protocols have defined (although horrible) semantics for it.