Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S932944AbcLGUrH (ORCPT ); Wed, 7 Dec 2016 15:47:07 -0500 Received: from mail-bn3nam01on0138.outbound.protection.outlook.com ([104.47.33.138]:13952 "EHLO NAM01-BN3-obe.outbound.protection.outlook.com" rhost-flags-OK-OK-OK-FAIL) by vger.kernel.org with ESMTP id S932808AbcLGUrF (ORCPT ); Wed, 7 Dec 2016 15:47:05 -0500 From: KY Srinivasan To: Olaf Hering CC: "vkuznets@redhat.com" , "gregkh@linuxfoundation.org" , "linux-kernel@vger.kernel.org" , "devel@linuxdriverproject.org" Subject: RE: move hyperv CHANNELMSG_UNLOAD from crashed kernel to kdump kernel Thread-Topic: move hyperv CHANNELMSG_UNLOAD from crashed kernel to kdump kernel Thread-Index: AQHSUGcX2rMR2fVQK0y/0wJ0y+Ek/aD8lNrQgAAMiQCAAAVI4IAAA+WAgAAA0ECAAATjgIAAGN3Q Date: Wed, 7 Dec 2016 18:11:04 +0000 Message-ID: References: <20161207085110.GC1618@aepfle.de> <7CEFFEF3-911A-4D37-AC37-DF8C6A3395BF@aepfle.de> <20161207161929.GD1618@aepfle.de> <20161207163953.GE1618@aepfle.de> In-Reply-To: <20161207163953.GE1618@aepfle.de> Accept-Language: en-US Content-Language: en-US X-MS-Has-Attach: X-MS-TNEF-Correlator: authentication-results: spf=none (sender IP is ) smtp.mailfrom=kys@microsoft.com; x-originating-ip: [131.107.174.254] x-ms-office365-filtering-correlation-id: f23427da-d75f-48fa-2ce4-08d41ecc68f3 x-microsoft-antispam: UriScan:;BCL:0;PCL:0;RULEID:(22001);SRVR:DM5PR03MB2490; x-microsoft-exchange-diagnostics: 1;DM5PR03MB2490;7:TcS7ObyggWFWWKDKiMyPnwbHwpyhv8IXGSzs/YdU3ZNH2fJsXpNOEwDUBGpdiH9H9jKoqtQC5pQTvQUzc5zx53/i1VMMth47ptutM0IpU3nkA8ZkDav+zvTLsMnu19qy8Qp+C62tPO+NBsRCC2rqD4Tw7OCATJ6aNcQrZl3DxK4aS5gmrIOo57ghymJYksLyhQ3qtFcvDH/LdKE8mgQEVwqTGM+TABNpPCrm8aJJ5lEIp91xuYBvXLvegYOgpYVTdls9WHDXIs4Rtj/OxEXjNcrFdiqXTeIuPA+7JhNDeRNUWoea5zF+6VON++xQFiKWqA1Llu16MelrYiwlCvYXRnU7oy/APX8/sZOjnN4H1xGar0wbY31/6222BixhNNioefnt89RAE0sxPgSZVPvX8S0x+1JvKKFOQQrcFwuq+NNvOHYDVmTxByHyC7p6g7kdnTAaGU0B6g2VPsTgpoHeW44OvCtRmt5nZgjqnn4JkOs= x-o365eop-header: O365_EOP: Allow for Unauthenticated Relay x-o365ent-eop-header: Message processed by - O365_ENT: Allow from ranges (Engineering ONLY) x-microsoft-antispam-prvs: x-exchange-antispam-report-test: UriScan:(9452136761055); x-exchange-antispam-report-cfa-test: BCL:0;PCL:0;RULEID:(61425038)(6040375)(601004)(2401047)(8121501046)(5005006)(10201501046)(3002001)(6055026)(61426038)(61427038)(6041248)(20161123564025)(20161123562025)(20161123555025)(20161123560025)(20161123558021)(6047074)(6072148);SRVR:DM5PR03MB2490;BCL:0;PCL:0;RULEID:;SRVR:DM5PR03MB2490; x-forefront-prvs: 01494FA7F7 x-forefront-antispam-report: SFV:NSPM;SFS:(10019020)(6009001)(7916002)(24454002)(13464003)(189002)(199003)(377454003)(101416001)(39840400001)(7846002)(9686002)(39410400001)(8676002)(39450400002)(6116002)(77096006)(102836003)(86612001)(305945005)(74316002)(38730400001)(7736002)(8936002)(122556002)(86362001)(3846002)(81156014)(81166006)(54356999)(106356001)(76176999)(106116001)(99286002)(76576001)(5660300001)(105586002)(2900100001)(50986999)(92566002)(66066001)(229853002)(2950100002)(110136003)(68736007)(189998001)(97736004)(8990500004)(3660700001)(7696004)(6916009)(10090500001)(4326007)(3280700002)(2906002)(5005710100001)(10290500002)(33656002)(6506006)(39860400001)(93886004)(39850400001);DIR:OUT;SFP:1102;SCL:1;SRVR:DM5PR03MB2490;H:DM5PR03MB2490.namprd03.prod.outlook.com;FPR:;SPF:None;PTR:InfoNoRecords;MX:1;A:1;LANG:en; spamdiagnosticoutput: 1:99 spamdiagnosticmetadata: NSPM Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 X-OriginatorOrg: microsoft.com X-MS-Exchange-CrossTenant-originalarrivaltime: 07 Dec 2016 18:11:04.7460 (UTC) X-MS-Exchange-CrossTenant-fromentityheader: Hosted X-MS-Exchange-CrossTenant-id: 72f988bf-86f1-41af-91ab-2d7cd011db47 X-MS-Exchange-Transport-CrossTenantHeadersStamped: DM5PR03MB2490 Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Transfer-Encoding: 8bit X-MIME-Autoconverted: from base64 to 8bit by mail.home.local id uB7KlHt0019332 Content-Length: 947 Lines: 27 > -----Original Message----- > From: Olaf Hering [mailto:olaf@aepfle.de] > Sent: Wednesday, December 7, 2016 8:40 AM > To: KY Srinivasan > Cc: vkuznets@redhat.com; gregkh@linuxfoundation.org; linux- > kernel@vger.kernel.org; devel@linuxdriverproject.org > Subject: Re: move hyperv CHANNELMSG_UNLOAD from crashed kernel to > kdump kernel > > On Wed, Dec 07, KY Srinivasan wrote: > > > May be a better solution might be to have a new mechanism to indicate > > to the host that all state of the previous incarnation of the kernel > > needs to be cleaned up. This will be close to what we have on > > hardware. > > That would be cool, but until this appears and until its deployed in > Azure and elsewhere I will likely lose the remaining hairs. I think the code we have upstream works; I have not seen any issues reported. I will try to get the host guys to implement this - hopefully it won't be too late! K. Y > > Olaf