Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1758647AbeAIXFB (ORCPT + 1 other); Tue, 9 Jan 2018 18:05:01 -0500 Received: from mail-by2nam03on0103.outbound.protection.outlook.com ([104.47.42.103]:47360 "EHLO NAM03-BY2-obe.outbound.protection.outlook.com" rhost-flags-OK-OK-OK-FAIL) by vger.kernel.org with ESMTP id S1752504AbeAIXE7 (ORCPT ); Tue, 9 Jan 2018 18:04:59 -0500 From: Long Li To: "Martin K. Petersen" , Christoph Hellwig CC: KY Srinivasan , Haiyang Zhang , "devel@linuxdriverproject.org" , "linux-scsi@vger.kernel.org" , "linux-kernel@vger.kernel.org" , "stable@vger.kernel.org" Subject: RE: [PATCH] storvsc: do not assume SG list is continuous when doing bounce buffers (for 4.1 stable only) Thread-Topic: [PATCH] storvsc: do not assume SG list is continuous when doing bounce buffers (for 4.1 stable only) Thread-Index: AQHTGwgeCzSYTgLBr0SPYmQRSrcKyKKP6bqAgADTlUCAAMLWgIAAkR91gNr0IDA= Date: Tue, 9 Jan 2018 23:04:55 +0000 Message-ID: References: <1503379905-18908-1-git-send-email-longli@exchange.microsoft.com> <20170822062841.GA1061@infradead.org> <20170823064319.GA19373@infradead.org> In-Reply-To: Accept-Language: en-US Content-Language: en-US X-MS-Has-Attach: X-MS-TNEF-Correlator: x-originating-ip: [2001:4898:80e8:8::2e0] x-ms-publictraffictype: Email x-microsoft-exchange-diagnostics: 1;MWHPR21MB0832;7:B2oPUH2Jr/4F37Hu0Wmmu1KI1n/EfY0J/BHZVpKJ4mIjVIFkFUCM+yr54cuK4HT45D3nYacieDrvCzydtB1PThFnt0E6aKuq5G53FHIo1OpXyoNTyiFM0fQ8vD1pPeCKNorViHc6Lz2Kh+Y/GS9lcRyd2BjckKXxTWErNBVQJ1sL3ZZL9ihLVbVUsaniR48vWzNsETpF/a0KjT/H1LQcYN35zRxMr1Ax/5ALFBiwCb73RdyKnUIJQtjVmJu0RG07 x-ms-exchange-antispam-srfa-diagnostics: SSOS;SSOR; x-forefront-antispam-report: SFV:SKI;SCL:-1;SFV:NSPM;SFS:(10019020)(39860400002)(376002)(39380400002)(366004)(346002)(396003)(199004)(189003)(25786009)(7696005)(102836004)(110136005)(54906003)(76176011)(2900100001)(6506007)(59450400001)(6116002)(316002)(53936002)(97736004)(2950100002)(4326008)(106356001)(55016002)(5250100002)(5660300001)(2906002)(86362001)(105586002)(6246003)(22452003)(93886005)(33656002)(6436002)(478600001)(229853002)(7736002)(74316002)(99286004)(10290500003)(9686003)(8676002)(305945005)(68736007)(3280700002)(10090500001)(8990500004)(8936002)(81166006)(81156014)(14454004)(86612001)(3660700001);DIR:OUT;SFP:1102;SCL:1;SRVR:MWHPR21MB0832;H:MWHPR21MB0846.namprd21.prod.outlook.com;FPR:;SPF:None;PTR:InfoNoRecords;A:1;MX:1;LANG:en; x-ms-office365-filtering-correlation-id: 475d12dd-99a5-4c4a-c8e1-08d557b56625 x-ms-office365-filtering-ht: Tenant x-microsoft-antispam: UriScan:;BCL:0;PCL:0;RULEID:(7020042)(4652020)(4534072)(4602075)(4627168)(201703031133081)(201702281549075)(5600026)(4604075)(3008032)(48565401081)(2017052603307)(7193020);SRVR:MWHPR21MB0832; x-ms-traffictypediagnostic: MWHPR21MB0832: authentication-results: spf=none (sender IP is ) smtp.mailfrom=longli@microsoft.com; x-microsoft-antispam-prvs: x-exchange-antispam-report-test: UriScan:(146099531331640); x-exchange-antispam-report-cfa-test: BCL:0;PCL:0;RULEID:(61425038)(6040470)(2401047)(5005006)(8121501046)(3231023)(944501115)(93006095)(93001095)(10201501046)(3002001)(6055026)(61426038)(61427038)(6041268)(20161123560045)(20161123564045)(20161123558120)(20161123562045)(201703131423095)(201702281528075)(20161123555045)(201703061421075)(201703061406153)(6072148)(201708071742011);SRVR:MWHPR21MB0832;BCL:0;PCL:0;RULEID:(100000803124)(100110400117);SRVR:MWHPR21MB0832; x-forefront-prvs: 0547116B72 x-microsoft-antispam-message-info: 9PBDkKagvf0Fipf+EX0IN7wVxjanrLbMXsF2yc6ozCjT4otRRkHNdOS0yphqMlotYozppNYWlBRn1gQHclTJLA== spamdiagnosticoutput: 1:99 spamdiagnosticmetadata: NSPM Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 8BIT MIME-Version: 1.0 X-OriginatorOrg: microsoft.com X-MS-Exchange-CrossTenant-Network-Message-Id: 475d12dd-99a5-4c4a-c8e1-08d557b56625 X-MS-Exchange-CrossTenant-originalarrivaltime: 09 Jan 2018 23:04:55.6191 (UTC) X-MS-Exchange-CrossTenant-fromentityheader: Hosted X-MS-Exchange-CrossTenant-id: 72f988bf-86f1-41af-91ab-2d7cd011db47 X-MS-Exchange-Transport-CrossTenantHeadersStamped: MWHPR21MB0832 Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Return-Path: > Christoph, > > > Ok. If the stable maintainers are ok with your small fix I'm not > > going to complain too loudly. But I'm always worried about stable > > trees divering too much from mainline. > > The seemingly innocuous transition from SG_GAPS to virt boundary has > caused several data corruption regressions in the distro kernels. So has the > corresponding conversion of storvsc. > > As a result, getting the current upstream code into 4.1 would mean > backporting and testing a significant amount of both block layer and driver > code. I don't think it's worth the risk. This patch is simple and the path of least > resistance. > > Acked-by: Martin K. Petersen Sorry to bring up this patch again. It seems it hasn't made it to stable branches. Please take a look. > > -- > Martin K. Petersen Oracle Linux Engineering