Received-SPF: pass (google.com: domain of linux-kernel-owner@vger.kernel.org designates 2620:137:e000::1:20 as permitted sender) client-ip=2620:137:e000::1:20;
From:   "Tian, Kevin" <kevin.tian@intel.com>
To:     Christoph Hellwig <hch@lst.de>, Jason Gunthorpe <jgg@ziepe.ca>
CC:     "Rao, Lei" <lei.rao@intel.com>,
        "kbusch@kernel.org" <kbusch@kernel.org>,
        "axboe@fb.com" <axboe@fb.com>, "kch@nvidia.com" <kch@nvidia.com>,
        "sagi@grimberg.me" <sagi@grimberg.me>,
        "alex.williamson@redhat.com" <alex.williamson@redhat.com>,
        "cohuck@redhat.com" <cohuck@redhat.com>,
        "yishaih@nvidia.com" <yishaih@nvidia.com>,
        "shameerali.kolothum.thodi@huawei.com" 
        <shameerali.kolothum.thodi@huawei.com>,
        "mjrosato@linux.ibm.com" <mjrosato@linux.ibm.com>,
        "linux-kernel@vger.kernel.org" <linux-kernel@vger.kernel.org>,
        "linux-nvme@lists.infradead.org" <linux-nvme@lists.infradead.org>,
        "kvm@vger.kernel.org" <kvm@vger.kernel.org>,
        "Dong, Eddie" <eddie.dong@intel.com>,
        "Li, Yadong" <yadong.li@intel.com>,
        "Liu, Yi L" <yi.l.liu@intel.com>,
        "Wilk, Konrad" <konrad.wilk@oracle.com>,
        "stephen@eideticom.com" <stephen@eideticom.com>,
        "Yuan, Hang" <hang.yuan@intel.com>
Subject: RE: [RFC PATCH 5/5] nvme-vfio: Add a document for the NVMe device
Thread-Topic: [RFC PATCH 5/5] nvme-vfio: Add a document for the NVMe device
Thread-Index: AQHZCTfYyny4e3N+rkKvPkqEmu3jSa5gZMsAgABvfICAAAEagIAD/L5A
Date:   Fri, 9 Dec 2022 02:05:21 +0000
Message-ID: <BN9PR11MB5276EBF06791EF7B39648FA48C1C9@BN9PR11MB5276.namprd11.prod.outlook.com>
References: <20221206055816.292304-1-lei.rao@intel.com>
 <20221206055816.292304-6-lei.rao@intel.com> <20221206062604.GB6595@lst.de>
 <Y48+AaG5rSCviIhl@ziepe.ca> <20221206130901.GB24358@lst.de>
In-Reply-To: <20221206130901.GB24358@lst.de>
Accept-Language: en-US
Content-Language: en-US
x-ms-exchange-antispam-messagedata-chunkcount: 1
x-ms-exchange-antispam-messagedata-0: =?us-ascii?Q?kyDbP2W+3Vo8BqxmCNyNYViXzIF4ECaa1yt+du5cOknQ3Lv9Kev7y2z0SpU+?=
 =?us-ascii?Q?AIWsVuMUpB83i/VmMIblEk5PcsNYyPDTDwGNCWLXhl1OidLVxSLUcuEedaf2?=
 =?us-ascii?Q?OK+ZULKYhpUg76G/P4kcVub+x/3ywoXEe3QfIMYgGnl36/QeHkSyMSu6kHX6?=
 =?us-ascii?Q?4nyvSmrPNbNBiwVHhBzHF8v/yGaZFffHnEI77yMyJZHdVcnbDBCbZJTprQCd?=
 =?us-ascii?Q?7E7adNP5DsnE+wCFdPJGNFA4FXycsDPtGlT6d2A5A02GP2VFWYO+6fkECiJ+?=
 =?us-ascii?Q?6Cm0PzOLv/3VvfJejUE2vPji0q6S/kX3VXDWs2m8QaJOtzSAY5XtgrIc7m65?=
 =?us-ascii?Q?BDAcuFho4HICyDcsaIG1y/LUQ1wYFWEnlG4QG/L9lFdMiRBP3wTtmGXDuLHE?=
 =?us-ascii?Q?Ckfin+OP1Z2MCJnrAnv6iJ4plxxfLi2hbUtf6Qap7komK0M0kiGAgBRuVX+p?=
 =?us-ascii?Q?coqcsP1wvNewBu8Hncpqp6XCxSJMzmVVEjMA0SsaQMNMr2KNlLqKNt901euS?=
 =?us-ascii?Q?DwRPyX21hJ6UPKBdmA8mS3x3hE8s5Ig9fnb65qYvKoNyuhqIbQqsrp5ov1gl?=
 =?us-ascii?Q?Dl2+7UsC5I2f19cx3a/setxVH6t1dlOaW4Nzc0yelfw+gmrAOcv4BHKV7yOj?=
 =?us-ascii?Q?ggMNGRmiOguy71NTx3KGRGh0kihnPNLjPKcC+PMoS4YnuR1zL75edbzBruhg?=
 =?us-ascii?Q?7m4Gpw9LzhBROVr4xnPHgDdJZvsORVNS2/jAXSfPfTntAQlW8BffqUHS/Tq9?=
 =?us-ascii?Q?kvTl8ZYimF9er0e85a1fmGZN0vfJiz4UpuATnH/ifBay0ajJIrCu9iWHU7a3?=
 =?us-ascii?Q?6Il/xMbAZr8CTIzBDpHuVpoFqZeRIjFD1f2zUPnBZBIkFGh1/i37y/9ZAvoD?=
 =?us-ascii?Q?jITI2CKoNWvz8OTA/AiA4per15yABPxwG+jtNtgqwX9nLEpGCKNM8Q5ScL2z?=
 =?us-ascii?Q?o3CM5YrTPjPCS3hgPDtFgjZ8kddzcVlNMuvlMY4fDUlzUDwthPisU9kc8BIg?=
 =?us-ascii?Q?pOcsL+UrYa8GsOZvE4Wp2/SOtRzn4lZpDFqu1dY6hUXauh2s5M3WEklc+rvU?=
 =?us-ascii?Q?iKk+PEZaPCtjplYHPkhbAKvvpxVAOnXY7ym+9ZnGbC7XQomJj5ffEqUOMAo8?=
 =?us-ascii?Q?M5cmzrO7CrRxbWRkIpDmwd9zLuAPgS3uB+x7bl1yEtgfkMt/B8bHCnz2pD7h?=
 =?us-ascii?Q?9obqW3IbmXFqCdnRFZ2Ec+mw06PRUe+GSIcKiQT+0QdpgkVoWyaRvTX7KjHw?=
 =?us-ascii?Q?H5QvaB9QVEE/p1efmOpMVXKGFKsitaP2IEa67p76nRFwKd3HUx7s0a0yQjKz?=
 =?us-ascii?Q?c5BSLe0RnAsDUX3nnuvN//1rG1QwBF0vwgndZaKHra2t6d4+YsIRuckkpba4?=
 =?us-ascii?Q?TQXuxdARfZGa+3WT7o8efX5Nj2BMj4U3ZyIJtzDAITzQPsqszWJWeA9hSO46?=
 =?us-ascii?Q?OjYduNHhWdjn6phNhTfixIiT0usmL0y5VgJHGCMbqyUbPZzCdGwSiZ+e4N5p?=
 =?us-ascii?Q?g6jM30RTR9a2rY9QGtI8CSLO1JsXW4WI5gmBBFlbOJ/yg9CRetkjIee+6wly?=
 =?us-ascii?Q?lq2INdw6gYMvdU0YPoyix0ttzfRwFpovthrzDjaW?=
Content-Type: text/plain; charset="us-ascii"
Content-Transfer-Encoding: quoted-printable
MIME-Version: 1.0
X-MS-Exchange-CrossTenant-AuthAs: Internal
X-MS-Exchange-CrossTenant-AuthSource: BN9PR11MB5276.namprd11.prod.outlook.com
X-MS-Exchange-CrossTenant-Network-Message-Id: e7ef241e-86c2-431a-8042-08dad989d3bd
X-MS-Exchange-CrossTenant-originalarrivaltime: 09 Dec 2022 02:05:21.1879
 (UTC)
X-MS-Exchange-CrossTenant-fromentityheader: Hosted
X-MS-Exchange-CrossTenant-id: 46c98d88-e344-4ed4-8496-4ed7712e255d
X-MS-Exchange-CrossTenant-mailboxtype: HOSTED
X-MS-Exchange-CrossTenant-userprincipalname: f57J5OgO1P00yX9vbq1jJu6WRX4UnTtX8VBm74OpgAVo1oawU1Vfwq/Z83+75hLkuLUqlBItl77pN7MNT4aMrg==
X-MS-Exchange-Transport-CrossTenantHeadersStamped: MW5PR11MB5908
X-OriginatorOrg: intel.com
X-Spam-Status: No, score=-4.4 required=5.0 tests=BAYES_00,DKIMWL_WL_HIGH,
        DKIM_SIGNED,DKIM_VALID,DKIM_VALID_AU,DKIM_VALID_EF,RCVD_IN_DNSWL_MED,
        SPF_HELO_NONE,SPF_NONE autolearn=ham autolearn_force=no version=3.4.6
X-Spam-Checker-Version: SpamAssassin 3.4.6 (2021-04-09) on
        lindbergh.monkeyblade.net
Precedence: bulk
List-ID: <linux-kernel.vger.kernel.org>
X-Mailing-List: linux-kernel@vger.kernel.org

> From: Christoph Hellwig <hch@lst.de>
> Sent: Tuesday, December 6, 2022 9:09 PM
>=20
>=20
> > I don't think we know enough about this space at the moment to fix a
> > specification to one path or the other, so I hope the TPAR will settle
> > on something that can support both models in SW and people can try
> > things out.
>=20
> I've not seen anyone from Intel actually contributing to the live
> migration TPAR, which is almost two month old by now.

Not a NVMe guy but obviously Intel should join. I have forwarded this
to internal folks to check the actual status.

And I also asked them to prepare a document explaining how this
opaque cmd actually works to address your concerns.