Received-SPF: pass (google.com: domain of linux-kernel-owner@vger.kernel.org designates 2620:137:e000::3:6 as permitted sender) client-ip=2620:137:e000::3:6;
From:   Christophe Leroy <christophe.leroy@csgroup.eu>
To:     Ryan Roberts <ryan.roberts@arm.com>, Peter Xu <peterx@redhat.com>
CC:     Matthew Wilcox <willy@infradead.org>,
        Christoph Hellwig <hch@infradead.org>,
        "linux-kernel@vger.kernel.org" <linux-kernel@vger.kernel.org>,
        "linux-mm@kvack.org" <linux-mm@kvack.org>,
        Andrea Arcangeli <aarcange@redhat.com>,
        James Houghton <jthoughton@google.com>,
        Lorenzo Stoakes <lstoakes@gmail.com>,
        David Hildenbrand <david@redhat.com>,
        Vlastimil Babka <vbabka@suse.cz>,
        John Hubbard <jhubbard@nvidia.com>,
        Yang Shi <shy828301@gmail.com>,
        Rik van Riel <riel@surriel.com>,
        Hugh Dickins <hughd@google.com>,
        Jason Gunthorpe <jgg@nvidia.com>,
        Axel Rasmussen <axelrasmussen@google.com>,
        "Kirill A . Shutemov" <kirill@shutemov.name>,
        Andrew Morton <akpm@linux-foundation.org>,
        "linuxppc-dev@lists.ozlabs.org" <linuxppc-dev@lists.ozlabs.org>,
        Mike Rapoport <rppt@kernel.org>,
        Mike Kravetz <mike.kravetz@oracle.com>
Subject: Re: [PATCH RFC 06/12] mm/gup: Drop folio_fast_pin_allowed() in hugepd
 processing
Thread-Topic: [PATCH RFC 06/12] mm/gup: Drop folio_fast_pin_allowed() in
 hugepd processing
Thread-Index: AQHaGCxakejDChMrKU+uwfinjAsKCLCC5iYAgAIQ84CAAQxzAIACFO2AgAAaXYCAAB5+gIAACegAgADfT4CAAHXcgIAJyEQAgAQxj4CAAWqrAIAAA94A
Date:   Mon, 4 Dec 2023 11:25:16 +0000
Message-ID: <97c21205-f3e6-4634-82e6-c7bbd81d1835@csgroup.eu>
References: <20231116012908.392077-7-peterx@redhat.com>
 <ZVsYMMJpmFV2T/Zc@infradead.org> <ZVzT5_3Zn-Y-6xth@x1n>
 <ZV21GCbG48nTLDzn@infradead.org> <ZV90JcnQ1RGud/0R@casper.infradead.org>
 <ZV-KQ0e0y9BTsHGv@x1n> <d2313c1d-1e50-49b7-bed7-840431af799a@arm.com>
 <ZV-sJsdFfXiCkylv@x1n> <510adc26-9aed-4745-8807-dba071fadbbe@arm.com>
 <ZWDKV0XNjplc_vUP@x1n> <ZWj_EgljG3NwS5r1@x1n>
 <283da12c-14f1-4255-b3c4-ab933f3373c4@csgroup.eu>
 <01aad92f-b1e0-4f31-b905-8b1c2012ebab@arm.com>
In-Reply-To: <01aad92f-b1e0-4f31-b905-8b1c2012ebab@arm.com>
Accept-Language: fr-FR, en-US
Content-Language: fr-FR
user-agent: Mozilla Thunderbird
x-ms-exchange-antispam-messagedata-chunkcount: 1
x-ms-exchange-antispam-messagedata-0: =?utf-8?B?ejc2b3kyakZmM0c0U0tnRzg2UWZLTjM3TjhaaWJnMHhFRFp2dUtoWnJsQVF3?=
 =?utf-8?B?NXVxd05vajFBWVBWcXpjKzVIdzFHQjFaKzFEYmpUZThQcVA1dCt0UlEwZ25U?=
 =?utf-8?B?ODlrSE5EaHNtM2FsdlNXaWEwQTVLRTJ6OGErQjFRMVp5NzBvdmJvS084azJJ?=
 =?utf-8?B?bHJub1hmVWc4TkhVQ3A4YVNSSXRENDBPdzFBcWVMRmdYSWYzZ0NsSWNwYVEy?=
 =?utf-8?B?ZXc5VkprejJoYWhDL2lrcWE1VkV3K2tVU2hZbzBHenFXb1d6b3JxOEkydlhZ?=
 =?utf-8?B?WE9GNzM0SVpGbG5pMjFKMUI4bEEwTUxaQUFZZE13cnZITms3b3VueTU4VDJP?=
 =?utf-8?B?Q2x1VzdtZWlDNXJoZytPMGhFd2pCb29XSStMZ3I2bGprem1ITmppSExMb0Vi?=
 =?utf-8?B?NGJmc0ZCMjNkaXlGVHNFR21BanhRQUcwMDBNWS8ycUpHU0J5Yy8xSlB2ZDQ3?=
 =?utf-8?B?Rm5pK0pzbFduTzNkVkVDdThwaUpRTnRabXdMTFlsTlJXSnRvSFpkK3czdHU0?=
 =?utf-8?B?eFRIUWJaT1dveGtCUVo2QTBZcU50R2ZIMENTd3BEbWdZaHdrZUxqU0ZYM203?=
 =?utf-8?B?TnhuZnZwMjdSOEwvL2pkM2RUNDJNRXk0SmJoR215c0hwUDJGMFZLUWZFczhS?=
 =?utf-8?B?dzVvN2E2aEZua0RBT1crRHhZYnZtQmpnbTRFTWZiYXFzTnhySHVQajV1em5E?=
 =?utf-8?B?QVU1akdEU1VKdjBpSHFiZk1XZk9lOEt5Y21uUSs0RGFrUGE4UExYb3duNXBN?=
 =?utf-8?B?UERSM0xoeFEzaFVvN2w2aysrZ2MzS24wMFVhWUNBblcrZ2FYVHovMXFOQ2Nh?=
 =?utf-8?B?Ujd4dS9ncjFvdis1Q2cvellpSlBzRS84R1MydGdwdzRFZ283c0tzdDNMSjla?=
 =?utf-8?B?QUNQTlF3NzlBYTgwcFJMRW0vbUtqeWl0ZjA5dmE3d1NjaEJCa0RMbVVOY0c2?=
 =?utf-8?B?SUVUamZIV29IWnZ6U3pjeTQ0S1RJcmI0MjZoQmozKzg4QXBnL2lYTWRmVWp2?=
 =?utf-8?B?dVVZME90YnRoWmRuaHBBSEY0UlNNQU5KWVFaa2pyUUQwODd3OElBMkZGU2Rj?=
 =?utf-8?B?c3ZaRFRaV2ptZ2VXaFpqV2NyeXhPVmhKUS9YWGNqOTZXVG82SWxjTnRzTnJt?=
 =?utf-8?B?THMvaVFFbFRVR2VqTVhTRFVFdFhEeklYVkE1Q1BIUVpKN0FVL1VIbVp3Q0pP?=
 =?utf-8?B?d3Q5aXYyZVA1ZzZmYmtRVTVrV3QydExBdjFLanE2WXJKcGpFS0d0Kzg5WHVi?=
 =?utf-8?B?c2dIem8veTk1ZklvRnY4cWZSZmNWSnlWZk9nV1hId0pVZW4rUHdROURRVTFq?=
 =?utf-8?B?K0NWdnNWa3NlY2FSbVArUGtweTdYU0grNDI0WGRVRkNmMXpUeUFidjlXaXJ4?=
 =?utf-8?B?d1AyOUlLTGN5ZmNvOGpBcmtFRFROU2VTdlRyY0F6b3RyZWdOa2dJbDdoQWJF?=
 =?utf-8?B?MkFrZ2pYYkFwZm5yb3lobmFhYmh2cndDdG9IcEdneGswRlI2cVBBdkJNNFRW?=
 =?utf-8?B?R05Ed0JmazBxQW81clRqaFFhSUs0VzE1eGttWEQ0SGZ5NFc4RFU4V2RFcUN4?=
 =?utf-8?B?U005Z05iZGo5T1lKVDhSczhBZWxKZlZEV09UT2RVK3ZHTmo3NGIreWVxNmtw?=
 =?utf-8?B?L0pwcVlHcTY3RGlUV3BqUTBxd0VsRWw0U0JUOFJTZ0ZlU25QcVFMaG5WWFp4?=
 =?utf-8?B?WlQ2T3cvMXE3cGdueWlIK1g4VVJ2QlBlSGhNSkdsTnRTbGZzTGt3NHBnSzJZ?=
 =?utf-8?B?WE9tNVFiRVpVeEJ2Z1E5VnlWODRseWVrK3ZWc29WdG5KTUhESXBqMk10NXgw?=
 =?utf-8?B?dFRmcGhBN3BmT01qQW54TDlRWnl6TytlMldpaGFCeWVFNG1zaERyY1hETExG?=
 =?utf-8?B?RkVkYlU2YkpjL1BMUUhkYm5rVW5NczJNNlRKMmkvNytLb0dvbW5xOGNjSk1G?=
 =?utf-8?B?T2dVUkJ6bWNsZ2Qra1BScU15TnpoYmEvNjJBenZaVDJEWjVIcGtoaUw5TlNu?=
 =?utf-8?B?cVhkZDFBYXhhblNYUzAwUGhodm1lWTJ0ejdxNVlZSHQ0Vi82ekRZVUdIbTB6?=
 =?utf-8?B?ekxiWmZvd0lWWW9SMTJUVEF0TzBQeXUxTWFyN1JpZFBoN29FanB3Qmt1Tndt?=
 =?utf-8?Q?/T6H8/Hyq0b2UgqFySzXNxcb2?=
Content-Type: text/plain; charset="utf-8"
Content-ID: <59C220F1B3AADF4AB80CE87554E6D85C@FRAP264.PROD.OUTLOOK.COM>
Content-Transfer-Encoding: base64
MIME-Version: 1.0
X-OriginatorOrg: csgroup.eu
X-MS-Exchange-CrossTenant-AuthAs: Internal
X-MS-Exchange-CrossTenant-AuthSource: MRZP264MB2988.FRAP264.PROD.OUTLOOK.COM
X-MS-Exchange-CrossTenant-Network-Message-Id: c55db98d-1336-4dd1-fed6-08dbf4bbb0e5
X-MS-Exchange-CrossTenant-originalarrivaltime: 04 Dec 2023 11:25:16.6896
 (UTC)
X-MS-Exchange-CrossTenant-fromentityheader: Hosted
X-MS-Exchange-CrossTenant-id: 9914def7-b676-4fda-8815-5d49fb3b45c8
X-MS-Exchange-CrossTenant-mailboxtype: HOSTED
X-MS-Exchange-CrossTenant-userprincipalname: u3nLdSzOW0Z5kv4Pkvjm7qMjhncmp58c8dveYUJJEDeglsD7H/RntAh14l7ukxIMwj3YfRTPmVMqjnh+RVo8QaZd8dM5MKpR3ZPHWHE0+8U=
X-MS-Exchange-Transport-CrossTenantHeadersStamped: MR1P264MB3298
X-Spam-Status: No, score=-0.9 required=5.0 tests=DKIM_SIGNED,DKIM_VALID,
	DKIM_VALID_AU,HEADER_FROM_DIFFERENT_DOMAINS,MAILING_LIST_MULTI,
	SPF_HELO_NONE,SPF_PASS,T_SCC_BODY_TEXT_LINE autolearn=unavailable
	autolearn_force=no version=3.4.6
X-Spam-Checker-Version: SpamAssassin 3.4.6 (2021-04-09) on pete.vger.email
Precedence: bulk
List-ID: <linux-kernel.vger.kernel.org>
X-Mailing-List: linux-kernel@vger.kernel.org
X-Greylist: Sender passed SPF test, not delayed by milter-greylist-4.6.4 (pete.vger.email [0.0.0.0]); Mon, 04 Dec 2023 03:55:04 -0800 (PST)
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