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Shutemov" CC: "linux-mm@kvack.org" , "linux-kernel@vger.kernel.org" , Jerome Glisse , Paolo Bonzini , "aarcange@redhat.com" Subject: RE: [RFC PATCH v1 4/4] mm/gup: flag to limit follow_page() to transhuge pages Thread-Topic: [RFC PATCH v1 4/4] mm/gup: flag to limit follow_page() to transhuge pages Thread-Index: AdWwBRVo97ip28i7RLG6c8GTBoWkWgANoD+AAAKKloA= Date: Wed, 11 Dec 2019 17:13:57 +0000 Message-ID: References: <20191211155645.pkxphc4uo7ir6pbb@box> In-Reply-To: <20191211155645.pkxphc4uo7ir6pbb@box> 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=mcirjaliu@bitdefender.com; x-originating-ip: [91.199.104.6] x-ms-publictraffictype: Email x-ms-office365-filtering-correlation-id: 45e8d451-3932-4f22-0f9c-08d77e5d8228 x-ms-traffictypediagnostic: DB7PR02MB4137:|DB7PR02MB4137:|DB7PR02MB4137: x-microsoft-antispam-prvs: x-ms-exchange-transport-forked: True x-ms-oob-tlc-oobclassifiers: OLM:4502; x-forefront-prvs: 024847EE92 x-forefront-antispam-report: SFV:NSPM;SFS:(10019020)(346002)(376002)(39860400002)(396003)(366004)(136003)(199004)(189003)(52536014)(26005)(478600001)(4326008)(66446008)(6506007)(76116006)(186003)(54906003)(7696005)(2906002)(66946007)(33656002)(81156014)(64756008)(81166006)(9686003)(55016002)(71200400001)(8936002)(8676002)(86362001)(6916009)(4744005)(66556008)(66476007)(5660300002)(316002);DIR:OUT;SFP:1102;SCL:1;SRVR:DB7PR02MB4137;H:DB7PR02MB3979.eurprd02.prod.outlook.com;FPR:;SPF:None;LANG:en;PTR:InfoNoRecords;A:1;MX:1; received-spf: None (protection.outlook.com: bitdefender.com does not designate permitted sender hosts) x-ms-exchange-senderadcheck: 1 x-microsoft-antispam: BCL:0; x-microsoft-antispam-message-info: zczQ7k16rOHvgTahbCgOOw1H2SX8stGwsQJ5E7x5HzpcgDX8ARPl7kvys9XRKzJemDiFpjaZ0DOztTYyTM/uGy5Bfsnbx95D4RXhJstJ3VPkbmw7SCXcSmQXnVC5R26w3gi8rA8snDp5ESgXQkypo4uGAqWVbfVYmDTRmrtguIPXMBMlQWM+vQ4zTN5tncheXKZZThCqLvkNaRUwlAzInLQy+h2HTc3WvqYTMxpYr39VX5cUh9buF+yJ/fk/MI4IUQE/ZmEYTbSCIi3dGST8/mjsZ7V2WaoYbZwFCmyiqfMHRDcAN46viieF9stJ0phiOOetGYibbaremMinjPB4/S1BHTgaeb47SSRvOMMxofw5+uy8obuZ1KToWA0fAKYJiIv+bYzH+iNtAHBteR9BeVSCYK0iaBARCgKHHAYdQfYz8q2MjkpGBwtU0CspU0VF Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: quoted-printable MIME-Version: 1.0 X-OriginatorOrg: bitdefender.com X-MS-Exchange-CrossTenant-Network-Message-Id: 45e8d451-3932-4f22-0f9c-08d77e5d8228 X-MS-Exchange-CrossTenant-originalarrivaltime: 11 Dec 2019 17:13:57.6546 (UTC) X-MS-Exchange-CrossTenant-fromentityheader: Hosted X-MS-Exchange-CrossTenant-id: 487baf29-f1da-469a-9221-243f830c36f3 X-MS-Exchange-CrossTenant-mailboxtype: HOSTED X-MS-Exchange-CrossTenant-userprincipalname: vonPK8VLoQgAHL/5Sgsgt8aAD87wTMVQhBWADdcfZC+KnCsxZIJvYk9OL+lEmjQmZz8FMO6fJo9Odn5LlvrxyFbTbSKXiSSs7XSvOiMGodQ= X-MS-Exchange-Transport-CrossTenantHeadersStamped: DB7PR02MB4137 X-Bogosity: Ham, tests=bogofilter, spamicity=0.000018, version=1.2.4 Sender: owner-linux-mm@kvack.org Precedence: bulk X-Loop: owner-majordomo@kvack.org List-ID: > On Wed, Dec 11, 2019 at 09:29:19AM +0000, Mircea CIRJALIU - MELIU wrote: > > Sometimes the user needs to look up a transhuge page mapped at a given > address. >=20 > There is no such examples in the current kernel, right? This is a helper patch for remote mapping main patch. It helps to establish an exact mirror of another process page table. And exact also involves huge mappings. >=20 > -- > Kirill A. Shutemov >=20 > ________________________ > This email was scanned by Bitdefender