From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S933680Ab3BLSG2 (ORCPT ); Tue, 12 Feb 2013 13:06:28 -0500 Received: from mx1.redhat.com ([209.132.183.28]:13788 "EHLO mx1.redhat.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S933475Ab3BLSG1 (ORCPT ); Tue, 12 Feb 2013 13:06:27 -0500 Message-ID: <511A8491.5030407@redhat.com> Date: Tue, 12 Feb 2013 19:06:09 +0100 From: Paolo Bonzini User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:17.0) Gecko/20130110 Thunderbird/17.0.2 MIME-Version: 1.0 To: Alex Bligh CC: linux-kernel@vger.kernel.org, nbd-general@lists.sf.net, Paul Clements , Andrew Morton Subject: Re: [PATCH 1/3] nbd: support FLUSH requests References: <1360685171-3792-1-git-send-email-pbonzini@redhat.com> <1360685171-3792-2-git-send-email-pbonzini@redhat.com> <115932E2-48BE-406E-9E75-61D12EB5937A@alex.org.uk> In-Reply-To: <115932E2-48BE-406E-9E75-61D12EB5937A@alex.org.uk> Content-Type: text/plain; charset=ISO-8859-1 Content-Transfer-Encoding: 7bit Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Il 12/02/2013 18:37, Alex Bligh ha scritto: > For my education, why remove the FUA stuff? Because I had no way to test it. >>> > > Hmmm... the underlying storage could be md/dm RAIDs in which case FUA >>> > > should be cheaper than FLUSH. >> > >> > If someone ever wrote a virtio-blk backend that sits directly ontop >> > of the Linux block layer that would be true. > In this case we don't know what the backend is sitting on top of > a-priori. It might be the current nbd server code, but it might > not be. Do you know of any other NBD server than the "official" one and qemu-nbd? Paolo