From mboxrd@z Thu Jan 1 00:00:00 1970 From: "Martin K. Petersen" Subject: Re: [PATCH 1/1] scsi: storvsc: Always use blk-mq Date: Wed, 19 Dec 2018 21:51:04 -0500 Message-ID: References: <1545243282-10573-1-git-send-email-mikelley@microsoft.com> Mime-Version: 1.0 Content-Type: text/plain Return-path: In-Reply-To: <1545243282-10573-1-git-send-email-mikelley@microsoft.com> (Michael Kelley's message of "Wed, 19 Dec 2018 18:40:49 +0000") Sender: linux-kernel-owner@vger.kernel.org To: Michael Kelley Cc: KY Srinivasan , Stephen Hemminger , "martin.petersen@oracle.com" , Long Li , "James.Bottomley@hansenpartnership.com" , "emilne@redhat.com" , "devel@linuxdriverproject.org" , "linux-kernel@vger.kernel.org" , "linux-scsi@vger.kernel.org" List-Id: linux-scsi@vger.kernel.org Michael, > With high IOPS storage being increasingly prevalent for guests > on Hyper-V and in Azure, make blk-mq the default so that the > full performance of the storage can be realized without having > to tweak other configuration settings. The legacy I/O path will be gone in 4.21 so this patch isn't needed. -- Martin K. Petersen Oracle Linux Engineering 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 BC2F4C43387 for ; Thu, 20 Dec 2018 02:51:35 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 8499C20866 for ; Thu, 20 Dec 2018 02:51:35 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (2048-bit key) header.d=oracle.com header.i=@oracle.com header.b="buNUAy44" Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1728705AbeLTCve (ORCPT ); Wed, 19 Dec 2018 21:51:34 -0500 Received: from userp2130.oracle.com ([156.151.31.86]:49008 "EHLO userp2130.oracle.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1726604AbeLTCve (ORCPT ); Wed, 19 Dec 2018 21:51:34 -0500 Received: from pps.filterd (userp2130.oracle.com [127.0.0.1]) by userp2130.oracle.com (8.16.0.22/8.16.0.22) with SMTP id wBK2nlwj103787; Thu, 20 Dec 2018 02:51:10 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=9HTrMzNBGTglOr/lTFke6xIbnrhEmNC7kCuXn+zAMj0=; b=buNUAy44SknDSMPb7f2QshoCZScTbVD3cl0e7BTjp9wASbXOy8W27+OX+Y/54osyaYNA lfs1PgNrh9HBBXqJvppJmE+v48z38rYu2smjgolktLLXDAEsETkpJUD8yn/bZaUyRr3E rhFedHl7/iuvMn49aC/DOHfTzC9Wout593h/aRuxctIb7oo6rXck6YvzTv3SprHp7+TG rGEKxNUZ+ZeELI9nBlt2gyMJ0bchWqMCr+l4rJpHBB37jUmSvivKEwdMtQVX+2aUk9Tp QGGYofQmolNybW6Y84dCBCUWGOJikAYFSHSS4OGKBBj8UjsGh+Egak28MIV+PXIDcJWK rg== Received: from aserv0022.oracle.com (aserv0022.oracle.com [141.146.126.234]) by userp2130.oracle.com with ESMTP id 2pfh3a4wt5-1 (version=TLSv1.2 cipher=ECDHE-RSA-AES256-GCM-SHA384 bits=256 verify=OK); Thu, 20 Dec 2018 02:51:09 +0000 Received: from userv0122.oracle.com (userv0122.oracle.com [156.151.31.75]) by aserv0022.oracle.com (8.14.4/8.14.4) with ESMTP id wBK2p81d006750 (version=TLSv1/SSLv3 cipher=DHE-RSA-AES256-GCM-SHA384 bits=256 verify=OK); Thu, 20 Dec 2018 02:51:08 GMT Received: from abhmp0002.oracle.com (abhmp0002.oracle.com [141.146.116.8]) by userv0122.oracle.com (8.14.4/8.14.4) with ESMTP id wBK2p7mD005096; Thu, 20 Dec 2018 02:51:07 GMT Received: from ca-mkp.ca.oracle.com (/10.159.214.123) by default (Oracle Beehive Gateway v4.0) with ESMTP ; Wed, 19 Dec 2018 18:51:07 -0800 To: Michael Kelley Cc: KY Srinivasan , Stephen Hemminger , "martin.petersen\@oracle.com" , Long Li , "James.Bottomley\@hansenpartnership.com" , "emilne\@redhat.com" , "devel\@linuxdriverproject.org" , "linux-kernel\@vger.kernel.org" , "linux-scsi\@vger.kernel.org" Subject: Re: [PATCH 1/1] scsi: storvsc: Always use blk-mq From: "Martin K. Petersen" Organization: Oracle Corporation References: <1545243282-10573-1-git-send-email-mikelley@microsoft.com> Date: Wed, 19 Dec 2018 21:51:04 -0500 In-Reply-To: <1545243282-10573-1-git-send-email-mikelley@microsoft.com> (Michael Kelley's message of "Wed, 19 Dec 2018 18:40:49 +0000") Message-ID: User-Agent: Gnus/5.13 (Gnus v5.13) Emacs/26.1 (gnu/linux) MIME-Version: 1.0 Content-Type: text/plain X-Proofpoint-Virus-Version: vendor=nai engine=5900 definitions=9112 signatures=668680 X-Proofpoint-Spam-Details: rule=notspam policy=default score=0 suspectscore=0 malwarescore=0 phishscore=0 bulkscore=0 spamscore=0 mlxscore=0 mlxlogscore=297 adultscore=0 classifier=spam adjust=0 reason=mlx scancount=1 engine=8.0.1-1810050000 definitions=main-1812200020 Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Michael, > With high IOPS storage being increasingly prevalent for guests > on Hyper-V and in Azure, make blk-mq the default so that the > full performance of the storage can be realized without having > to tweak other configuration settings. The legacy I/O path will be gone in 4.21 so this patch isn't needed. -- Martin K. Petersen Oracle Linux Engineering