From mboxrd@z Thu Jan 1 00:00:00 1970 Authentication-Results: smtp.subspace.kernel.org; arc=pass header.oldest-pass=0 smtp.remote-ip=40.93.198.70 ARC-Seal: i=2; d=subspace.kernel.org; s=arc20261015; a=rsa-sha256; cv=pass; t=1793156322; b=01vCk2l9CvPum4QRkqnFOZx3TNtvf3pZEv+0OS0cJxuG1v1NUylbLBe7SVQS8VgyIXDV sNRh/uZtZh6rFwellA0P/zmVWv68eAaRfQsdWcYEEVQSHqeozqzWk3jLyYf9A0RTAMV1H OsSs7Ji0sALcBkaQ97ud53SFAtb/fZv6v36Vf8mhKOmjTC478G/0B+/VqTxFHBXfISHaf duEiY4LtD9qE66Wk+KwoDl+pn4mWK7BUIAXsArv+vOfilV2iAULl760xdj+aflBlUsekz DRpWGDhrXTlnK0WdGTC8nkfCxqCLuzOyQ0U9avKwhaWW3wH0Zw0tT4c5o9CvFfVENtQ== ARC-Message-Signature: i=2; d=subspace.kernel.org; s=arc20261015; a=rsa-sha256; c=relaxed/relaxed; t=1793156322; h=DMARC-Filter:DKIM-Signature:Received:Received: Content-Transfer-Encoding:Content-Type:Date:Message-Id:Subject:Cc:To: From:X-Mailer:References:In-Reply-To:X-ClientProxiedBy:MIME-Version: X-MS-PublicTrafficType:X-MS-TrafficTypeDiagnostic: X-MS-Office365-Filtering-Correlation-Id:X-MS-Exchange-SenderADCheck: X-MS-Exchange-AntiSpam-Relay:X-Microsoft-Antispam: X-Microsoft-Antispam-Message-Info:X-Forefront-Antispam-Report: X-MS-Exchange-AntiSpam-MessageData-ChunkCount: X-MS-Exchange-AntiSpam-MessageData-0:X-OriginatorOrg: X-MS-Exchange-CrossTenant-Network-Message-Id: X-MS-Exchange-CrossTenant-AuthSource:X-MS-Exchange-CrossTenant-AuthAs: X-MS-Exchange-CrossTenant-OriginalArrivalTime: X-MS-Exchange-CrossTenant-FromEntityHeader: X-MS-Exchange-CrossTenant-Id:X-MS-Exchange-CrossTenant-MailboxType: X-MS-Exchange-CrossTenant-UserPrincipalName: X-MS-Exchange-Transport-CrossTenantHeadersStamped; bh=70+ae3ZTqtj1+07muayYl3ANIB+dyOWYDBZ5+RJCHYs=; b=OED74frYz+KjVh0h0h6jBqIHJY9yXn+mo5a9Som3dMbYhKin6AQl4VwyVOuML2A5FJjE KbeQvQJo9xIf9VdKG/+gClZhMfcUs3uZ4r663uuywlHD+vzfV+dCZEw50+zF1Riy2gfPO OOjBaFkW1zMhizMFCh14oeZN4mFO2GWYo9NnmZbQ4XUPs3klwxsq3JkRkA7t8W1z/9UCg 8HapUDFBWUvWh9oBMkhdRoA3pSDYXVOL8XypHEPgmEQciyiDOWMglYDAKZyo7PAY15GK8 +v2nGSrtGZakJ6YgLTybk2vuQbw38z14qCfU7/jUmkOi4YsfKxdCaUfdPzr2/V23nJw== ARC-Authentication-Results: i=2; smtp.subspace.kernel.org; dmarc=pass header.from=nvidia.com; spf=fail smtp.mailfrom=nvidia.com; dkim=pass header.d=Nvidia.com header.i=@Nvidia.com header.a=rsa-sha256 header.s=selector2 header.b=HZUJT375; arc=pass header.oldest-pass=0 smtp.remote-ip=40.93.198.70 Received: from CY7PR03CU001.outbound.protection.outlook.com (mail-westcentralusazon11010070.outbound.protection.outlook.com [40.93.198.70]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange ECDHE (secp384r1) server-signature ECDSA (prime256v1) server-digest SHA256) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id D83C6606A31A; Wed, 28 Oct 2026 02:58:41 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.4.2 smtp.subspace.kernel.org D83C6606A31A Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=reject dis=none) header.from=nvidia.com Authentication-Results: smtp.subspace.kernel.org; spf=fail smtp.mailfrom=nvidia.com Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key, unprotected) header.d=Nvidia.com header.i=@Nvidia.com header.a=rsa-sha256 header.s=selector2 header.b=HZUJT375 ARC-Seal: i=1; a=rsa-sha256; s=arcselector10001; d=microsoft.com; cv=none; b=LxkpL9B2OJrBuU388imPmmPuuXNOqaciLWhgvSkeDv3iNPSeTaDwKTXLYYTbchoQZfIFjaXnJL17JT9+tyRzyM1WBmHv5swwyidIUWtPuvu4P2cJkhqcfNHvKNlGT/DNQZbKfaj/SQMP+DDriUh0Nid4fP3Rthn8ccoqUIq+bbD6IBgQJaO/evVbe1HZgPu6I1dZofSrkJqCo+JFD97uEyjSzSdsatAhelh4Qqe6TZwWaGy/ECJxwqG9oNd5K995HJ5YGvhG/EKngGH7P4OY8HKWW5virxa0UMQwiCFs8n/KCZc/k5ku6sxV0k0ZChHfAT0hcit/0ZbEh58DKJ2+EA== ARC-Message-Signature: i=1; a=rsa-sha256; c=relaxed/relaxed; d=microsoft.com; s=arcselector10001; h=From:Date:Subject:Message-ID:Content-Type:MIME-Version:X-MS-Exchange-AntiSpam-MessageData-ChunkCount:X-MS-Exchange-AntiSpam-MessageData-0:X-MS-Exchange-AntiSpam-MessageData-1; bh=70+ae3ZTqtj1+07muayYl3ANIB+dyOWYDBZ5+RJCHYs=; b=NwFAtlQ1KDLnYi/zSlcDXnvGiVhKnp8KwAHvV/QGayYFh102vSmQWqQ5V8Les5u0L90hJqhNHgCUGYwAwSPyIKV0xwWmZyI0jxRMbBr0qcjMy8o85B5EDdjXA9Phsb9Ipw5YIpg8V4UIeM4QeteQMqVNjLUXJkDODXLTkPg2zlPPvstr9bqwL64XDT2orEa8hOWco7op7ASdzvFFY/OgvPcMncJmOAnWH6lOacWYSIcq3hvZ7SrtGBQdBpuSSDxPji5PunB18b3WRzUL/QaWJ2+WjkUhmprED7QrGlJ6O5KZkhFEY5w59F2xdMzyHJ7j9tO10Ny7gtnPK2jdSujGUA== ARC-Authentication-Results: i=1; mx.microsoft.com 1; spf=pass smtp.mailfrom=nvidia.com; dmarc=pass action=none header.from=nvidia.com; dkim=pass header.d=nvidia.com; arc=none DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=Nvidia.com; s=selector2; h=From:Date:Subject:Message-ID:Content-Type:MIME-Version:X-MS-Exchange-SenderADCheck; bh=70+ae3ZTqtj1+07muayYl3ANIB+dyOWYDBZ5+RJCHYs=; b=HZUJT375SpdVAF7Sp9FPnfiCDV9dEWNoMq3y8My/RrO/kwzjh2ji0fwylBheC/blH4oLA+2wqy+58cOL4nIsJVR9UEyFQq5vf6qozzyO2BoA8WtX21lNXE+4GYMTULUlw+NEUFliTdIMqY2cAQQ1DsdQLaZoYvAKBX4ya9ZE7hsCLv43lUXOIbbJaC8+rG3/uurvPM7gwnwxu1O4qtUK6hxAuJnFvO9l0WwCGywcP9h/0VIdK5mXoPl0f5qvkNNXW0Qi3ea+Mt6Lm/aqVC0IamDWgd4K1gmnyB4z5XkCxiP5gcBSG8ORfvaPAT0Aue2tJ6clppftcFmEkAMGrdzH7Q== Authentication-Results: mx.microsoft.com 1; dkim=none (message not signed) header.d=none;dmarc=none action=none header.from=nvidia.com; Received: from IA0PR12MB8374.namprd12.prod.outlook.com (2603:10b6:208:40e::7) by DM6PR12MB4155.namprd12.prod.outlook.com (2603:10b6:5:221::15) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id 15.21.546.22; Wed, 28 Oct 2026 02:58:32 +0000 Received: from IA0PR12MB8374.namprd12.prod.outlook.com ([fe80::d85f:4c87:ae84:3f16]) by IA0PR12MB8374.namprd12.prod.outlook.com ([fe80::d85f:4c87:ae84:3f16%6]) with mapi id 15.21.0546.021; Wed, 28 Oct 2026 02:58:32 +0000 Content-Transfer-Encoding: quoted-printable Content-Type: text/plain; charset=UTF-8 Date: Tue, 27 Oct 2026 22:58:30 -0400 Message-Id: Subject: Re: [PATCH 14/46] mm/huge_memory: fix zapping migration entries for device-private THPs Cc: , , , , , , "Chris Mason" , To: "David Hildenbrand (Arm)" , "Andrew Morton" , "Johannes Weiner" , "Michal Hocko" , "Qi Zheng" , "Shakeel Butt" , "Lorenzo Stoakes" , "Kairui Song" , "Barry Song" , "Axel Rasmussen" , "Yuanchu Xie" , "Wei Xu" , "Baoquan He" , "Baolin Wang" , "Liam R. Howlett" , "Vlastimil Babka" , "Mike Rapoport" , "Suren Baghdasaryan" , "Michal Hocko" , "Kees Cook" , "Peter Zijlstra" , "Jann Horn" , "Pedro Falcato" , "Hugh Dickins" , "Pasha Tatashin" , "Pratyush Yadav" , "Matthew Wilcox (Oracle)" , "Jan Kara" , "Lance Yang" , "Rik van Riel" , "Harry Yoo" , "Alistair Popple" , "Nico Pache" , "Ryan Roberts" , "Dev Jain" , "Usama Arif" , "Kiryl Shutsemau" , "Matthew Brost" , "John Hubbard" , "Peter Xu" , "Will Deacon" , "Aneesh Kumar K.V" , "Nick Piggin" , "Oscar Salvador" , "Minchan Kim" , "Muchun Song" , "Xu Xin" , "Chengming Zhou" , "Chris Li" , "Kemeng Shi" , "Nhat Pham" , "Youngjun Park" , "Gregory Price" , "Joshua Hahn" , "Rakie Kim" , "Ying Huang" , "Jason Gunthorpe" From: "Zi Yan" X-Mailer: aerc 0.22.0 References: <20261027-fixes_core-v1-0-6f74bec9a5bb@kernel.org> <20261027-fixes_core-v1-14-6f74bec9a5bb@kernel.org> In-Reply-To: <20261027-fixes_core-v1-14-6f74bec9a5bb@kernel.org> X-ClientProxiedBy: MN0PR03CA0023.namprd03.prod.outlook.com (2603:10b6:208:52f::22) To IA0PR12MB8374.namprd12.prod.outlook.com (2603:10b6:208:40e::7) X-Mailing-List: linux-arch@vger.kernel.org List-Id: List-Post: List-Help: List-Subscribe: List-Unsubscribe: List-Owner: Precedence: list MIME-Version: 1.0 X-MS-PublicTrafficType: Email X-MS-TrafficTypeDiagnostic: IA0PR12MB8374:EE_|DM6PR12MB4155:EE_ X-MS-Office365-Filtering-Correlation-Id: c6663443-d9fc-4b67-c97e-08df349f59d5 X-MS-Exchange-SenderADCheck: 1 X-MS-Exchange-AntiSpam-Relay: 0 X-Microsoft-Antispam: BCL:0;ARA:13230040|366016|7416014|376014|1800799024|23010399003|921020|4143699003|11063799006|10067099003|261026121527099003|261021123027099003|261021121427099003|261022075727099003|261009223027099003|56012099006|22082099003|18002099003|6133799003; X-Microsoft-Antispam-Message-Info: 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 X-Forefront-Antispam-Report: CIP:255.255.255.255;CTRY:;LANG:en;SCL:1;SRV:;IPV:NLI;SFV:NSPM;H:IA0PR12MB8374.namprd12.prod.outlook.com;PTR:;CAT:NONE;SFS:(13230040)(366016)(7416014)(376014)(1800799024)(23010399003)(921020)(4143699003)(11063799006)(10067099003)(261026121527099003)(261021123027099003)(261021121427099003)(261022075727099003)(261009223027099003)(56012099006)(22082099003)(18002099003)(6133799003);DIR:OUT;SFP:1101; X-MS-Exchange-AntiSpam-MessageData-ChunkCount: 1 X-MS-Exchange-AntiSpam-MessageData-0: =?utf-8?B?RHp3NHVXOEJvNVFaemhtQjgybDFNdVFPbVRNNytmTGE3MHJaQzgwbzBnY2Jy?= =?utf-8?B?NllmZmU5NFIzV0xhZEdZSm9Ibi9aeTM4OFMrMC9FVHJXVnE2NWsrMTJoeERX?= =?utf-8?B?MTdJNW1qRzdnVXhER3lOd05LcW1ydEllKzUxSzVWcnlSdzVidEdhYm9nMEFR?= =?utf-8?B?OWx0NVArYWY3alE0SCtMYlRROTRiTEZJM3Y5RUF2b2ZtVkVQL092UWtzNHA3?= =?utf-8?B?Vm9GY2RHZUtweFpMMXNjMWtmczNrZzllMXExSlVBUjFXODRLTlNpVy9EMnlH?= =?utf-8?B?bXJOSUgxR25mb24zaVBIenF6TzYvZzlIdDlPVHhZTkQvWTdQMm1xSFF0Q2Ex?= =?utf-8?B?K0ZjODE0Qnk2MjlJOVdTMk5wcUhLNStWenNUL3hscnNSekdXeksxTVlmSmxu?= =?utf-8?B?WGZsUTQ1MjJDQVNieHY0cENkWk5ZaXB5amZNMGh4OEFPS3FscWMrcStWdjdZ?= =?utf-8?B?OXltdTZtVm9BQThWV21CL2crY2JydUptN21XMUdkckp3Zld6eWc0eVNLUnlx?= =?utf-8?B?L3JpT3hTTmJjYmdkWURhNEQ4cDYxZE1nMWhYdnpYK0EzbGJxdkdNeHNUcDhm?= =?utf-8?B?Zk5xVVFUVFFFbjdQV01OdVhUU2xRbzNTY3IwdVlFZE1HVjBROUxiWXdqVWpp?= =?utf-8?B?WWlxWEIrSXZvU2dSZnlFWTNlR1g3OUtNdUZ5ZVByV21iWXpqVnlLc3hOWkRM?= =?utf-8?B?Q0JvWDU1cUZIMTVZNXduME5SYkNEUXdiY25EVmFMZk5wOEVUMFpoaWQvVDBi?= =?utf-8?B?eWxzWmF2RytoZ1NVbTBVUHBCWHI0THdKVmFCb2Zkdy9Ic0laZXdVdVBxK3hF?= =?utf-8?B?aFdEVTloMXcrM3EvYUgxbDNlU0RIaDZZT3lndWR2Y25DQnVweWpEczRpbW1R?= =?utf-8?B?YVVlckZkcTJLdmtnbnJlWklSdVZ6bFNULzhPdEdYaWhlaWxOZ3daMXpSWEJD?= =?utf-8?B?ZW54UUdPVExPK0w3Q3FpTGF4UmV3cW9wUWVxckFaRTFXYkU0TzhXWkx3akR3?= =?utf-8?B?OWlTVytINFMwTlZld3ZiT3hMT0F0UHN0bHlkQS9PVWViTGNDR1NPeVVVMlJ1?= =?utf-8?B?RjB0SUNMMTVMK2lRNS9BajRDQlEvcm93djBkZ3VicUM1QnJZV2ZBTU42TUZ1?= =?utf-8?B?aW1DS1d2dlR6RGhidEIzdzFlVnlWaXhncDJZczFzTlE4RVZRN3hPQ1hia1Ro?= =?utf-8?B?RFBwNm5jcSthdFk1bVZTWmxtMFlLR0lkU0FXZytROVN0Y0toTysyUEtGOHJm?= =?utf-8?B?eEM0MUF5TU5ub2RwVUF6SHRFS2VoaWhPc093QnViRTVpS0pOdFBLcHRWSmlC?= =?utf-8?B?L3JFYmJ1Q1ArRkpZUDY1V21XMkQwMm9vZVNibW1TMnBhaXN1LzJXWjRnTjds?= =?utf-8?B?YzFoSlAvWjFnMnlvbmxPa2lGWEtOVlp3S1lKVGtYbEZhMDZvT0xJNi9DTTRE?= =?utf-8?B?UlB6K1hnSDJuNUc5bC90UExCMDRDT3hORTFJMG9IMnViSldLTm85dmNCdWFs?= =?utf-8?B?WmkyZWt2cGp4WUZQL0NUOUNqR015Rk05TkhQZ2ZvdDkzemY4UFNGNzhXd0tu?= =?utf-8?B?ZzA4V3gzem1TMmhxY2U1cDVvbGc5R002QzZrWnJsYkVZUjV3QWkyU3RIc1pq?= =?utf-8?B?Z3FVWlNrd1E1WmRtUzE0L2toUXFiam52Zy9YOU1HeEU2OFhtVDlSK0hMSWEr?= =?utf-8?B?UDB1bHlZcTR4SVRENjVTMHorNXhNanNjWDd4OE1UckFSeFJ0QnFYWFdWOXUw?= =?utf-8?B?Unl2RHJ3a3p3cncwOXRMejNFQ1k5bHl0dGZ0T2lvUExjQUY0Ny9iRUJCU21a?= =?utf-8?B?ZUgzL2NOUWRzYzVLYk5uZHhxa1VkOGJIUVc5WWtncFBES0ZrKzZORngzOUJB?= =?utf-8?B?T3I2M3d2d2lGSEs1SmhYVkwzV2dJSSsxekFRcGNhSWp0WWZLSmpSdWN3VVFp?= =?utf-8?B?RjhDei9EbG9FQ3AvVnFoQXRYOHRJTFFyeWl4c3UvRTk4dm9CTEJHOTN0b3lq?= =?utf-8?B?a0d5SE5sNkVrNjVFYzA3bm14c1ZQd3dGeFlLcmNZaUs5ZDZCNkR5UlVZdXJi?= =?utf-8?B?enhZd3huZVo4b0JUaFVBcGMySmw2eldzZnpFOGQvMmpyNmxSMk1jaC9MVXB2?= =?utf-8?B?UVBibW04OTNwSnRRSVpVSkIzRTdFcVAzZk9rNXVuOUdKVFpOOWIrdWhhODhr?= =?utf-8?B?ZXZMRlJ1TE1nZnU4azJocFM1cHZYeDdYTlFINW8yKy9TK2ZsRkJqcUZBeG5N?= =?utf-8?B?UkZRc0hONlJDRDFlN3RHZEFXS1NhWW83NmxXamhDL1BDRGk4Ym55VkFucmFP?= =?utf-8?Q?K2a7+abisiieuFtvEq?= X-OriginatorOrg: Nvidia.com X-MS-Exchange-CrossTenant-Network-Message-Id: c6663443-d9fc-4b67-c97e-08df349f59d5 X-MS-Exchange-CrossTenant-AuthSource: IA0PR12MB8374.namprd12.prod.outlook.com X-MS-Exchange-CrossTenant-AuthAs: Internal X-MS-Exchange-CrossTenant-OriginalArrivalTime: 28 Oct 2026 02:58:32.2679 (UTC) X-MS-Exchange-CrossTenant-FromEntityHeader: Hosted X-MS-Exchange-CrossTenant-Id: 43083d15-7273-40c1-b7db-39efd9ccc17a X-MS-Exchange-CrossTenant-MailboxType: HOSTED X-MS-Exchange-CrossTenant-UserPrincipalName: Wk1su8W9IPs55MRRIgbk0V82MMl9tHWF7iAM3t5q1yKThc1ixgS5czsHLTkO5VY5 X-MS-Exchange-Transport-CrossTenantHeadersStamped: DM6PR12MB4155 On Mon Oct 26, 2026 at 7:17 PM EDT, David Hildenbrand (Arm) wrote: > From: Chris Mason > > A PMD migration entry can refer to a device-private folio. Right, set_pmd_migration_entry() does that when a device private folio is migrated back to system memory. > zap_huge_pmd_folio() checks the folio type instead of the entry type, > so it treats such a migration entry as a device-private entry. > > Installing the migration entry already removed the reverse mapping and > dropped the mapping reference. Zapping it must not repeat those > operations. Concurrent MADV_DONTNEED during migration back to system > memory can trigger this. > > Check the PMD entry type using pmd_is_device_private_entry(). > > Fix generated by an LLM and sent by Chris Mason in private. > > Fixes: 368076f52ebe ("mm/huge_memory: add device-private THP support to P= MD operations") > Cc: stable@vger.kernel.org > Signed-off-by: Chris Mason > [ david: simplify description ] > Signed-off-by: David Hildenbrand (Arm) > --- > mm/huge_memory.c | 2 +- > 1 file changed, 1 insertion(+), 1 deletion(-) > Reviewed-by: Zi Yan --=20 Best Regards, Yan, Zi