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Howlett" , Vlastimil Babka , Jann Horn , Pedro Falcato , Barry Song , Dev Jain , linux-mm@kvack.org, linux-kernel@vger.kernel.org, Ryan Roberts Subject: Re: [PATCH HOTFIX 6.17] mm/mremap: avoid expensive folio lookup on mremap folio pte batch Message-ID: <44956337-9162-4831-8f59-e4abd80cc683@lucifer.local> References: <20250807185819.199865-1-lorenzo.stoakes@oracle.com> <158e6422-fc82-4d6c-a442-2ebe956a66da@redhat.com> <3fc75720-8da7-4f6c-bdce-1e1280b8e28f@lucifer.local> Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: X-ClientProxiedBy: AM0PR02CA0090.eurprd02.prod.outlook.com (2603:10a6:208:154::31) To DM4PR10MB8218.namprd10.prod.outlook.com (2603:10b6:8:1cc::16) MIME-Version: 1.0 X-MS-PublicTrafficType: Email X-MS-TrafficTypeDiagnostic: DM4PR10MB8218:EE_|PH8PR10MB6597:EE_ X-MS-Office365-Filtering-Correlation-Id: d714c382-2037-467a-c9e9-08ddd5f5a024 X-MS-Exchange-SenderADCheck: 1 X-MS-Exchange-AntiSpam-Relay: 0 X-Microsoft-Antispam: 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Or what's the point of > folio_pte_batch()? > > Why don't they matter here? I thought they did? (Discussed with David off-list - it turns out get_and_clear_ptes() handles this anyway, so it's not a concern).