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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 3/4] thp: fix huge page zapping for special PMDs Thread-Topic: [RFC PATCH v1 3/4] thp: fix huge page zapping for special PMDs Thread-Index: AdWwBRVdoL1dw8xpR1utr5q5yXwQBwANjjkAAAKGGBA= Date: Wed, 11 Dec 2019 17:08:36 +0000 Message-ID: References: <20191211155444.nx4o363rlskmvyhr@box> In-Reply-To: <20191211155444.nx4o363rlskmvyhr@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: 7ef84b4a-ade8-4f20-4322-08d77e5cc2c5 x-ms-traffictypediagnostic: DB7PR02MB5100:|DB7PR02MB5100:|DB7PR02MB5100: x-microsoft-antispam-prvs: x-ms-exchange-transport-forked: True x-ms-oob-tlc-oobclassifiers: OLM:2803; x-forefront-prvs: 024847EE92 x-forefront-antispam-report: SFV:NSPM;SFS:(10019020)(39860400002)(396003)(346002)(376002)(366004)(136003)(199004)(189003)(66476007)(8676002)(66446008)(478600001)(4744005)(76116006)(66946007)(52536014)(81156014)(6916009)(81166006)(5660300002)(64756008)(66556008)(54906003)(86362001)(55016002)(4326008)(186003)(71200400001)(2906002)(8936002)(7696005)(6506007)(26005)(33656002)(316002)(9686003)(14583001);DIR:OUT;SFP:1102;SCL:1;SRVR:DB7PR02MB5100;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: 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 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: 7ef84b4a-ade8-4f20-4322-08d77e5cc2c5 X-MS-Exchange-CrossTenant-originalarrivaltime: 11 Dec 2019 17:08:36.5473 (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: W5AbOuECrJo9U0W3Vh1mLeN4N49NFgQHm6dPFa9Av/UeXX/KQHTt91YOLR1VAocuEvAIqZI8JN95K2TQNmCBarnMjuZsKd6j2JB3R56lZew= X-MS-Exchange-Transport-CrossTenantHeadersStamped: DB7PR02MB5100 X-Bogosity: Ham, tests=bogofilter, spamicity=0.000000, 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 09:29:20AM +0000, Mircea CIRJALIU - MELIU wrote: > > When calling zap_vma_ptes() on VM_PFNMAP VMAs involving huge > mappings, >=20 > Do we have such VMAs? I have such VMAs in the remote mapping feature. Any reason why these VMAs are dangerous? >=20 > -- > Kirill A. Shutemov >=20 > ________________________ > This email was scanned by Bitdefender