From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1757463Ab2BIMSh (ORCPT ); Thu, 9 Feb 2012 07:18:37 -0500 Received: from e06smtp10.uk.ibm.com ([195.75.94.106]:51220 "EHLO e06smtp10.uk.ibm.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1757333Ab2BIMSe convert rfc822-to-8bit (ORCPT ); Thu, 9 Feb 2012 07:18:34 -0500 In-Reply-To: <4F3390FB.80107@redhat.com> References: <4F30F4EE.4080607@redhat.com> <4F311154.9080407@de.ibm.com> <4F3119A0.7080005@redhat.com> <4F312492.1040002@de.ibm.com> <4F313526.2050907@redhat.com> <4F3390FB.80107@redhat.com> To: Paolo Bonzini Cc: BORNTRAE@linux.vnet.ibm.com, James Bottomley , kvm@vger.kernel.org, linux-kernel@vger.kernel.org, linux-scsi@vger.kernel.org, mst@redhat.com, rusty@rustcorp.com.au MIME-Version: 1.0 Subject: Re: Pe: [PATCH v5 1/3] virtio-scsi: first version X-KeepSent: DF7B0B80:B44589BA-C125799F:00410C52; type=4; name=$KeepSent X-Mailer: Lotus Notes Release 8.5.2FP3 Aug 10, 2010 Message-ID: From: Christian Hoff Date: Thu, 9 Feb 2012 13:18:21 +0100 X-MIMETrack: S/MIME Sign by Notes Client on Christian Hoff/Germany/IBM(Release 8.5.2FP3|Aug 10, 2010) at 09/02/2012 13:18:25, Serialize by Notes Client on Christian Hoff/Germany/IBM(Release 8.5.2FP3|Aug 10, 2010) at 09/02/2012 13:18:25, Serialize complete at 09/02/2012 13:18:25, S/MIME Sign failed at 09/02/2012 13:18:25: The cryptographic key was not found, Serialize by Router on D06MC042/06/M/IBM(Release 8.5.2FP3|July 10, 2011) at 09/02/2012 13:18:23, Serialize complete at 09/02/2012 13:18:23 Content-Type: text/plain; charset="ISO-8859-1" Content-Transfer-Encoding: 8BIT x-cbid: 12020912-4966-0000-0000-000001687E54 Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Paolo Bonzini wrote: > James, will you include virtio-scsi in 3.4? The key arguments from my side for inclusion of virtio-scsi are: - Support for SCSI multipathing, which can optionally be done on the host operating system. - We can now use other SCSI(non-block) devices and make them accessible to the guest. For example we were able to virtualize a SCSI FCP tape using virtio-scsi. One of the biggest constraints of virtio-block is that it is limited to block devices, while virtio-scsi presents you with a more generic solution. So I consider virtio-scsi to be the cleaner approach to do virtualization of SCSI commands. This is supported by the fact that virtio-block has a maintenance problem and has to change its protocol from time to time to support new features introduced by a new version of the SCSI standard. So please consider including virtio-scsi into the mainline kernel tree. This is good and conceptually clean code, and it has proven to work very well in our internal testing. Mit freundlichen Grüßen / Kind regards Christian Hoff Student - Applied Computer Science Phone: 49-16098976-950 IBM Deutschland E-Mail: christian.hoff@de.ibm.com Am Fichtenberg 1 71083 Herrenberg Germany IBM Deutschland GmbH / Vorsitzender des Aufsichtsrats: Martin Jetter Geschäftsführung: Martina Koederitz (Vorsitzende), Reinhard Reschke, Dieter Scholz, Gregor Pillen, Joachim Heel, Christian Noll Sitz der Gesellschaft: Ehningen / Registergericht: Amtsgericht Stuttgart, HRB 14562 / WEEE-Reg.-Nr. DE 99369940