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=-1.2 required=3.0 tests=DKIMWL_WL_HIGH,DKIM_SIGNED, DKIM_VALID,DKIM_VALID_AU,HEADER_FROM_DIFFERENT_DOMAINS,MAILING_LIST_MULTI, SPF_PASS,UNPARSEABLE_RELAY autolearn=ham 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 7EC6AC43441 for ; Thu, 11 Oct 2018 01:58:36 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 3D24D20870 for ; Thu, 11 Oct 2018 01:58:36 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (2048-bit key) header.d=oracle.com header.i=@oracle.com header.b="qpb5/pB1" DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org 3D24D20870 Authentication-Results: mail.kernel.org; dmarc=fail (p=none dis=none) header.from=oracle.com Authentication-Results: mail.kernel.org; spf=none smtp.mailfrom=linux-kernel-owner@vger.kernel.org Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1726525AbeJKJXa (ORCPT ); Thu, 11 Oct 2018 05:23:30 -0400 Received: from aserp2120.oracle.com ([141.146.126.78]:57514 "EHLO aserp2120.oracle.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1725971AbeJKJXa (ORCPT ); Thu, 11 Oct 2018 05:23:30 -0400 Received: from pps.filterd (aserp2120.oracle.com [127.0.0.1]) by aserp2120.oracle.com (8.16.0.22/8.16.0.22) with SMTP id w9B1so5g032186; Thu, 11 Oct 2018 01:58:29 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-2018-07-02; bh=YrffBd6yVKUn2MDdxdq1tLEj3VMrRSytXeHAJhWE4cU=; b=qpb5/pB1qyM4Cz6pUtQbsiRIOz63GKghjnaxNI0IbsF3UjjbGya/2nBDBTMuwwmzSueD fc4HtwIKi1hwxodQESZbVMjQv0U35kZXRetjgWnk8IZVOu/dDCKmNOMVmTonFxzrtBat RGDE/qqZbBA3BZk1rchHb9uPJ55eB0cTeezYqQl5j3p8FetXOOMiypZF7qG1/FydZl0d HncvY315OYeNrkIQ11dDUGNnpoW4vmRBcIpwQbzQ/azIcYeL0AtGKdkLeUhAMpTtaXE6 fJzgbFIwkRgB8nEopIgLXVdFyW5AkCEUZYG4J4VSAOik4Sp2NQdyPeeKBwEMlVgjCo7D mw== Received: from userv0022.oracle.com (userv0022.oracle.com [156.151.31.74]) by aserp2120.oracle.com with ESMTP id 2mxn0q7hk2-1 (version=TLSv1.2 cipher=ECDHE-RSA-AES256-GCM-SHA384 bits=256 verify=OK); Thu, 11 Oct 2018 01:58:29 +0000 Received: from aserv0122.oracle.com (aserv0122.oracle.com [141.146.126.236]) by userv0022.oracle.com (8.14.4/8.14.4) with ESMTP id w9B1wRYk006515 (version=TLSv1/SSLv3 cipher=DHE-RSA-AES256-GCM-SHA384 bits=256 verify=OK); Thu, 11 Oct 2018 01:58:28 GMT Received: from abhmp0006.oracle.com (abhmp0006.oracle.com [141.146.116.12]) by aserv0122.oracle.com (8.14.4/8.14.4) with ESMTP id w9B1wRfu032442; Thu, 11 Oct 2018 01:58:27 GMT Received: from ca-mkp.ca.oracle.com (/10.159.214.123) by default (Oracle Beehive Gateway v4.0) with ESMTP ; Thu, 11 Oct 2018 01:58:27 +0000 To: John Garry Cc: , , , , Subject: Re: [PATCH 0/7] hisi_sas: Misc bugfixes and an optimisation patch From: "Martin K. Petersen" Organization: Oracle Corporation References: <1537801594-207139-1-git-send-email-john.garry@huawei.com> Date: Wed, 10 Oct 2018 21:58:25 -0400 In-Reply-To: <1537801594-207139-1-git-send-email-john.garry@huawei.com> (John Garry's message of "Mon, 24 Sep 2018 23:06:27 +0800") Message-ID: User-Agent: Gnus/5.13 (Gnus v5.13) Emacs/25.3 (gnu/linux) MIME-Version: 1.0 Content-Type: text/plain X-Proofpoint-Virus-Version: vendor=nai engine=5900 definitions=9042 signatures=668706 X-Proofpoint-Spam-Details: rule=notspam policy=default score=0 suspectscore=0 malwarescore=0 phishscore=0 bulkscore=0 spamscore=0 mlxscore=0 mlxlogscore=512 adultscore=0 classifier=spam adjust=0 reason=mlx scancount=1 engine=8.0.1-1807170000 definitions=main-1810110017 Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org John, > However it does block us in future from enabling SCSI MQ in the driver. We're going to remove the legacy I/O path so I'm not particularly keen on merging something that's going in the opposite direction. > This is because the IPTT index must be a unique value per HBA. However, > if we switched to SCSI MQ, the block layer tag becomes unique per queue, > and not per HBA. That doesn't sound right. -- Martin K. Petersen Oracle Linux Engineering