From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-0.8 required=3.0 tests=DKIMWL_WL_HIGH,DKIM_SIGNED, DKIM_VALID,DKIM_VALID_AU,HEADER_FROM_DIFFERENT_DOMAINS,MAILING_LIST_MULTI, SPF_HELO_NONE,SPF_PASS,UNPARSEABLE_RELAY autolearn=no autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id 6F9E7C33C99 for ; Fri, 10 Jan 2020 05:34:23 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 420472073A for ; Fri, 10 Jan 2020 05:34:23 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (2048-bit key) header.d=oracle.com header.i=@oracle.com header.b="n1Zn+uUK" Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1726671AbgAJFeW (ORCPT ); Fri, 10 Jan 2020 00:34:22 -0500 Received: from aserp2120.oracle.com ([141.146.126.78]:50342 "EHLO aserp2120.oracle.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1726096AbgAJFeW (ORCPT ); Fri, 10 Jan 2020 00:34:22 -0500 Received: from pps.filterd (aserp2120.oracle.com [127.0.0.1]) by aserp2120.oracle.com (8.16.0.27/8.16.0.27) with SMTP id 00A5NNMX031215; Fri, 10 Jan 2020 05:33:41 GMT DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=oracle.com; h=to : cc : subject : from : references : date : in-reply-to : message-id : mime-version : content-type; s=corp-2019-08-05; bh=IY5ypyWB8E0NmjrXstQmSbrKj69APzR1aWp/wYV3cCM=; b=n1Zn+uUKIbGajBv+fxV0zAXxrdFGkcPLS5xYgLavxm4mmAnjqQ0PgL5ryM6p7aXpgq37 hEPh1k96klPemk7mZ8fDXrR+cU1C+OWj2JjeU3npupNb6rA7uo7jEpWvvZK86QW4ZwUh s6JwpoT4q5dPR5Ln4WgCknvgueVVorv+c/uF2ViQJBcpMvwOxwkTFw3F4lFUgI1JlaFJ pOVMkDjP3CqLHRDJYg9P9LfKlTe5ST/cvz433esof96u3kCogSV5q1vjNUhgsetRe8vC 65NJXlD0hY/OltdB4kCs0eyY8HxoJQmQ7pEEQq7ZjPpPKZhFO8k3g6j726OZYC1P6DgE vg== Received: from userp3030.oracle.com (userp3030.oracle.com [156.151.31.80]) by aserp2120.oracle.com with ESMTP id 2xajnqfq75-1 (version=TLSv1.2 cipher=ECDHE-RSA-AES256-GCM-SHA384 bits=256 verify=OK); Fri, 10 Jan 2020 05:33:41 +0000 Received: from pps.filterd (userp3030.oracle.com [127.0.0.1]) by userp3030.oracle.com (8.16.0.27/8.16.0.27) with SMTP id 00A5Oge4175226; Fri, 10 Jan 2020 05:33:40 GMT Received: from userv0121.oracle.com (userv0121.oracle.com [156.151.31.72]) by userp3030.oracle.com with ESMTP id 2xeh8yxj4f-1 (version=TLSv1.2 cipher=ECDHE-RSA-AES256-GCM-SHA384 bits=256 verify=OK); Fri, 10 Jan 2020 05:33:40 +0000 Received: from abhmp0020.oracle.com (abhmp0020.oracle.com [141.146.116.26]) by userv0121.oracle.com (8.14.4/8.13.8) with ESMTP id 00A5XVT1011528; Fri, 10 Jan 2020 05:33:32 GMT Received: from ca-mkp.ca.oracle.com (/10.159.214.123) by default (Oracle Beehive Gateway v4.0) with ESMTP ; Thu, 09 Jan 2020 21:33:31 -0800 To: Bart Van Assche Cc: Chaitanya Kulkarni , "linux-block\@vger.kernel.org" , "linux-scsi\@vger.kernel.org" , "linux-nvme\@lists.infradead.org" , "dm-devel\@redhat.com" , "lsf-pc\@lists.linux-foundation.org" , "axboe\@kernel.dk" , "hare\@suse.de" , "Martin K. Petersen" , Keith Busch , Christoph Hellwig , Stephen Bates , "msnitzer\@redhat.com" , "mpatocka\@redhat.com" , "zach.brown\@ni.com" , "roland\@purestorage.com" , "rwheeler\@redhat.com" , "frederick.knight\@netapp.com" , Matias Bjorling Subject: Re: [LSF/MM/BFP ATTEND] [LSF/MM/BFP TOPIC] Storage: Copy Offload From: "Martin K. Petersen" Organization: Oracle Corporation References: Date: Fri, 10 Jan 2020 00:33:27 -0500 In-Reply-To: (Bart Van Assche's message of "Wed, 8 Jan 2020 19:18:54 -0800") Message-ID: User-Agent: Gnus/5.13 (Gnus v5.13) Emacs/26.1.92 (gnu/linux) MIME-Version: 1.0 Content-Type: text/plain X-Proofpoint-Virus-Version: vendor=nai engine=6000 definitions=9495 signatures=668685 X-Proofpoint-Spam-Details: rule=notspam policy=default score=0 suspectscore=0 malwarescore=0 phishscore=0 bulkscore=0 spamscore=0 mlxscore=0 mlxlogscore=999 adultscore=0 classifier=spam adjust=0 reason=mlx scancount=1 engine=8.0.1-1911140001 definitions=main-2001100047 X-Proofpoint-Virus-Version: vendor=nai engine=6000 definitions=9495 signatures=668685 X-Proofpoint-Spam-Details: rule=notspam policy=default score=0 priorityscore=1501 malwarescore=0 suspectscore=0 phishscore=0 bulkscore=0 spamscore=0 clxscore=1011 lowpriorityscore=0 mlxscore=0 impostorscore=0 mlxlogscore=999 adultscore=0 classifier=spam adjust=0 reason=mlx scancount=1 engine=8.0.1-1911140001 definitions=main-2001100047 Sender: linux-block-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-block@vger.kernel.org Bart, > * Copying must be supported not only within a single storage device but > also between storage devices. Identifying which devices to permit copies between has been challenging. That has since been addressed in T10. > * VMware, which uses XCOPY (with a one-byte length ID, aka LID1). I don't think LID1 vs LID4 is particularly interesting for the Linux use case. It's just an additional command tag since the copy manager is a third party. > * Microsoft, which uses ODX (aka LID4 because it has a four-byte length > ID). Microsoft uses the token commands. -- Martin K. Petersen Oracle Linux Engineering