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Byungchul Park , Gregory Price , Ying Huang , Alistair Popple Subject: Re: [PATCH] mm/migrate: remove the -EEXIST conversion for move_pages() Date: Mon, 07 Jul 2025 13:44:48 -0400 X-Mailer: MailMate (2.0r6272) Message-ID: <2647B6D8-4275-4108-BAB9-987FC4F0D86E@nvidia.com> In-Reply-To: <20250707065711.18056-1-richard.weiyang@gmail.com> References: <20250707065711.18056-1-richard.weiyang@gmail.com> Content-Type: text/plain X-ClientProxiedBy: MN2PR15CA0048.namprd15.prod.outlook.com (2603:10b6:208:237::17) To DS7PR12MB9473.namprd12.prod.outlook.com (2603:10b6:8:252::5) MIME-Version: 1.0 X-MS-PublicTrafficType: Email X-MS-TrafficTypeDiagnostic: DS7PR12MB9473:EE_|DM3PR12MB9352:EE_ X-MS-Office365-Filtering-Correlation-Id: 186cf8b8-0046-4820-8869-08ddbd7df983 X-MS-Exchange-SenderADCheck: 1 X-MS-Exchange-AntiSpam-Relay: 0 X-Microsoft-Antispam: BCL:0;ARA:13230040|1800799024|366016|7416014|376014|7053199007; X-Microsoft-Antispam-Message-Info: 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conversion is introduced in commit 65462462ffb2 ("mm/gup: > follow_pfn_pte(): -EEXIST cleanup"), since follow_page() may call > follow_pfn_pte() which may return -EEXIST. > > But after commit 7dff875c9436 ("mm/migrate: convert > add_page_for_migration() from follow_page() to folio_walk"), it use > folio_walk instead. This limit the error code and won't return -EEXIST. > > Remove the error code conversion here. > > Signed-off-by: Wei Yang > Cc: John Hubbard > Cc: David Hildenbrand > Cc: Zi Yan > Cc: Matthew Brost > Cc: Joshua Hahn > Cc: Rakie Kim > Cc: Byungchul Park > Cc: Gregory Price > Cc: Ying Huang > Cc: Alistair Popple > --- > mm/migrate.c | 7 ------- > 1 file changed, 7 deletions(-) > Reviewed-by: Zi Yan Best Regards, Yan, Zi