From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from kanga.kvack.org (kanga.kvack.org [205.233.56.17]) by smtp.lore.kernel.org (Postfix) with ESMTP id CDFDDC02180 for ; Tue, 14 Jan 2025 02:05:33 +0000 (UTC) Received: by kanga.kvack.org (Postfix) id 1A4006B0083; Mon, 13 Jan 2025 21:05:33 -0500 (EST) Received: by kanga.kvack.org (Postfix, from userid 40) id 17ACD6B0085; Mon, 13 Jan 2025 21:05:33 -0500 (EST) X-Delivered-To: int-list-linux-mm@kvack.org Received: by kanga.kvack.org (Postfix, from userid 63042) id F0F4D6B0088; Mon, 13 Jan 2025 21:05:32 -0500 (EST) X-Delivered-To: linux-mm@kvack.org Received: from relay.hostedemail.com (smtprelay0013.hostedemail.com [216.40.44.13]) by kanga.kvack.org (Postfix) with ESMTP id D36866B0083 for ; Mon, 13 Jan 2025 21:05:32 -0500 (EST) Received: from smtpin13.hostedemail.com (a10.router.float.18 [10.200.18.1]) by unirelay02.hostedemail.com (Postfix) with ESMTP id 768D2120589 for ; Tue, 14 Jan 2025 02:05:32 +0000 (UTC) X-FDA: 83004415704.13.64E1131 Received: from mgamail.intel.com (mgamail.intel.com [192.198.163.11]) by imf13.hostedemail.com (Postfix) with ESMTP id 7069C20003 for ; Tue, 14 Jan 2025 02:05:28 +0000 (UTC) Authentication-Results: imf13.hostedemail.com; dkim=pass header.d=intel.com header.s=Intel header.b=K2NIeq9w; arc=reject ("signature check failed: fail, {[1] = sig:microsoft.com:reject}"); spf=pass (imf13.hostedemail.com: domain of dan.j.williams@intel.com designates 192.198.163.11 as permitted sender) smtp.mailfrom=dan.j.williams@intel.com; dmarc=pass (policy=none) header.from=intel.com ARC-Message-Signature: i=2; a=rsa-sha256; c=relaxed/relaxed; d=hostedemail.com; s=arc-20220608; t=1736820329; h=from:from:sender:reply-to:subject:subject:date:date: message-id:message-id:to:to:cc:cc:mime-version:mime-version: content-type:content-type:content-transfer-encoding: in-reply-to:in-reply-to:references:references:dkim-signature; bh=8NEY3NWfhnrns8LRudAGMFE0YBKi6OdCt6jmummqaf8=; b=F/1vwJUDYgGhW9hGeXgDUwCms/EYo1UelB7jaAbHEZyesUAftISFLmuRa6KcNpuHp38R9D qWlSTm21O3PVBf7LGQy4AuDzEa2YtOh1s5E9cz+ml2Yca1Bo344PCXzmjSLUOSlAZYutYT Ek0zBWuVqC/X8YIQtni9GMow6cPf9RY= ARC-Seal: i=2; s=arc-20220608; d=hostedemail.com; t=1736820329; a=rsa-sha256; cv=fail; b=V2yylk8gE4EIKmE/4COuelMSdDRhvoIV/mv53j0CLA02wEa7xN2PLg/oxZo8tm+qisIR0p o8Ytzo1Rzxktg0OyEK6IrJOCu+mBYx6qwNH2JJv3GSVZvokzHahw8GWVFx7zR0zkT7oMhv ULJ3qcdaHs5fKGeWa1Hd1ubC1wzHX+U= ARC-Authentication-Results: i=2; imf13.hostedemail.com; dkim=pass header.d=intel.com header.s=Intel header.b=K2NIeq9w; arc=reject ("signature check failed: fail, {[1] = sig:microsoft.com:reject}"); spf=pass (imf13.hostedemail.com: domain of dan.j.williams@intel.com designates 192.198.163.11 as permitted sender) smtp.mailfrom=dan.j.williams@intel.com; dmarc=pass (policy=none) header.from=intel.com DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=intel.com; i=@intel.com; q=dns/txt; s=Intel; t=1736820328; x=1768356328; h=date:from:to:cc:subject:message-id:references: in-reply-to:mime-version; bh=4iHFmlua39Pop6qs2IjIfo/PP6Rd1K2uRIiRWqSdJhg=; b=K2NIeq9wpq7qbK0knt0U2n6z9YeyXIhYrQFVElDD70imwPsrqsNJhVuh H3/Z+LfgA/mIoqqjnNpXxYYg8EF5aBj1FtRYGMHJOuk4Wb0W50x1GV+WL HLIao+2jtoVeohr4WkGPlbyH9VwqAYnSUuVMU5uT+uF8BKAPbcGiob26+ 7D29uxNf5GojRk9Uj/yxiyXctlO7VE710L/wX/sswK+GluU8Kmj3CFRix Qg3i4VEbJR7uUgoxuMVNihJgmx4aEwNyRtoHsQ5qMCcTUFBmFsPpV5+tP UPDnhCsgrR3ftwSnM8eeABzM08sBMK+aQHOF1b4NCVEJuOrALwYCLDtb6 A==; X-CSE-ConnectionGUID: 5a9IIPrsTDKlX+u9TGC2jw== X-CSE-MsgGUID: Kx00zs/DRhuk5ugKHLVOlA== X-IronPort-AV: E=McAfee;i="6700,10204,11314"; a="47681585" X-IronPort-AV: E=Sophos;i="6.12,312,1728975600"; d="scan'208";a="47681585" Received: from fmviesa009.fm.intel.com ([10.60.135.149]) by fmvoesa105.fm.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 13 Jan 2025 18:05:26 -0800 X-CSE-ConnectionGUID: B2BETHLMQ3+FGc5aoO7bIw== X-CSE-MsgGUID: Ux3Q26DMTmOf6YFB+odsTw== X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="6.12,312,1728975600"; d="scan'208";a="105226518" Received: from orsmsx603.amr.corp.intel.com ([10.22.229.16]) by fmviesa009.fm.intel.com with ESMTP/TLS/AES256-GCM-SHA384; 13 Jan 2025 18:05:09 -0800 Received: from orsmsx601.amr.corp.intel.com (10.22.229.14) by ORSMSX603.amr.corp.intel.com (10.22.229.16) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256) id 15.1.2507.44; Mon, 13 Jan 2025 18:05:05 -0800 Received: from orsedg603.ED.cps.intel.com (10.7.248.4) by orsmsx601.amr.corp.intel.com (10.22.229.14) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256) id 15.1.2507.44 via Frontend Transport; Mon, 13 Jan 2025 18:05:05 -0800 Received: from NAM10-BN7-obe.outbound.protection.outlook.com (104.47.70.43) by edgegateway.intel.com (134.134.137.100) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id 15.1.2507.44; Mon, 13 Jan 2025 18:05:03 -0800 ARC-Seal: i=1; a=rsa-sha256; s=arcselector10001; d=microsoft.com; cv=none; b=Mqx/9HGMZ8FUNCf9y41cRaJg9jEejp2f26FjYIKuB2rJuVzoACRN/16MneaxXeaSNP5osQIGWG2e3g3cNaD/gUwsmnpL3arE+DLZkesOPQmwKIndk8fDWuiFjRkficTFYtkhrjeujOucG6Q65up2IotLgzVuKaB6uBcAKom1rWZRGG0LZBIVtWFGoXRDsd4CJFsg7CqMUUvC2pbQLV0T2fzxTtves4mPJs6axe37xH/TGcNtfp+eThSlM+TMlc3tXyZtCv9M3748bkWHF3SIH6l494nSDJRRzZZn5eiiDmA5OlHQ1DNjvliZta115EOW5R6iAwJCyFHRO8MHrxKndQ== 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=8NEY3NWfhnrns8LRudAGMFE0YBKi6OdCt6jmummqaf8=; b=hOgsHRj12QE4nNikWg4sJMw02V0u3yJjt9TO7wEwuOE6+W67D3gtNxbGV0j7s5vMEZy7m+av0A7LY8w8JzEAA1qsE3xVbFNUIX/kTvtmeOoNIlRfZcROYpHVLfIbZeU2dhNEbcDiTbZeGlEAWUeEWiDEKDqZ7PaBfXzxoySTxkBaLiTETBTLL5FlylQCs8xotKz75TcRPEVyeDKpVsW8e7Sr/7r/8nowUljYk9Q7JXqDD34Iv+7lWcuqYnnK5HiguaJdoqtQ6SyV7wRmtTWTK7iS7e6DoX821xPyUEVzjl6RIlmJq1UlB9VZr0tZBSXAtiZd4anbi7LlcNC9YawYuA== ARC-Authentication-Results: i=1; mx.microsoft.com 1; spf=pass smtp.mailfrom=intel.com; dmarc=pass action=none header.from=intel.com; dkim=pass header.d=intel.com; arc=none Received: from PH8PR11MB8107.namprd11.prod.outlook.com (2603:10b6:510:256::6) by DS7PR11MB7781.namprd11.prod.outlook.com (2603:10b6:8:e1::7) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id 15.20.8335.18; Tue, 14 Jan 2025 02:04:20 +0000 Received: from PH8PR11MB8107.namprd11.prod.outlook.com ([fe80::6b05:74cf:a304:ecd8]) by PH8PR11MB8107.namprd11.prod.outlook.com ([fe80::6b05:74cf:a304:ecd8%5]) with mapi id 15.20.8335.011; Tue, 14 Jan 2025 02:04:19 +0000 Date: Mon, 13 Jan 2025 18:04:14 -0800 From: Dan Williams To: Alistair Popple , , , CC: , Alistair Popple , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , Subject: Re: [PATCH v6 16/26] huge_memory: Add vmf_insert_folio_pmd() Message-ID: <6785c61e79bb5_20fa294f9@dwillia2-xfh.jf.intel.com.notmuch> References: <02216c30a733ecc84951f9aeb1130cef7497125d.1736488799.git-series.apopple@nvidia.com> Content-Type: text/plain; charset="us-ascii" Content-Disposition: inline In-Reply-To: <02216c30a733ecc84951f9aeb1130cef7497125d.1736488799.git-series.apopple@nvidia.com> X-ClientProxiedBy: MW4P220CA0003.NAMP220.PROD.OUTLOOK.COM (2603:10b6:303:115::8) To PH8PR11MB8107.namprd11.prod.outlook.com (2603:10b6:510:256::6) MIME-Version: 1.0 X-MS-PublicTrafficType: Email X-MS-TrafficTypeDiagnostic: PH8PR11MB8107:EE_|DS7PR11MB7781:EE_ X-MS-Office365-Filtering-Correlation-Id: 515e4374-cbbe-423a-22fb-08dd343fc18e X-LD-Processed: 46c98d88-e344-4ed4-8496-4ed7712e255d,ExtAddr X-MS-Exchange-SenderADCheck: 1 X-MS-Exchange-AntiSpam-Relay: 0 X-Microsoft-Antispam: BCL:0;ARA:13230040|366016|1800799024|7416014|376014|7053199007; X-Microsoft-Antispam-Message-Info: =?us-ascii?Q?9FWd1uVY8wsDyzzVGG4bLZL3CGoUT/qcjQR9YBmfuoS2A3EPP1E/IoIg843n?= =?us-ascii?Q?gNSNtEivJEDZH7q9x/1L8O4jqvJdOMC6gAv/mHPIpVroVdGrHFiaK4foJm0h?= =?us-ascii?Q?yi/CNOsy+OSoJTNfSWMhq1nEJNgYTDp8PD9n3xkaQOpivx7pJIM+ZJeS1wBG?= =?us-ascii?Q?3Icl9Q987BYKLQQpZEdFEWl0+K1/1cbz6+hEb8Uj/BTI6oFDARvf91tm8hlA?= =?us-ascii?Q?Nb+cGX7G4cTlK/meZXpMG8c3G2JgqxsoocOGY3zZbS0MGeyxBQ+B2oPKbwu3?= =?us-ascii?Q?YDt84rZbO49mPCe+jjHF37axvgWY27KhTKWj0ZNtVqWJBPyUpoz9Jpbj57Mm?= =?us-ascii?Q?a8uO0/C4e4xB0cq6SwoBTGNsLLR7IrCNlIbo64fpCUP0gCBQK51hHe/c8bTF?= =?us-ascii?Q?nSIWFmt5RkyvqBzZj0dCAqSFe4Lrk/hqh2ucePH85DD9cPvzNwr5tuLtJeDk?= =?us-ascii?Q?aO2yHF9IXY5bOUXYfxCji8V2C+2TWWnuelALY4260a2zoI/pec+pAzHqjuET?= =?us-ascii?Q?cowedQvFk5wdM33kDYsC1tKE53pZFRoNhXUXyv9S/lI8O3KIHnM9MBU5wOyp?= =?us-ascii?Q?1PIfJaqE4EqyHiq1a5YUB/v/rGHWF5koAAk0mwIIXtLjHaG0XWN+2pJdIVVJ?= =?us-ascii?Q?O8iDQhNpLSA2SUIA8j7Z/pqXv1iRopX0SunbiuiY2wlH4f3l7tu9/qoX4HNW?= =?us-ascii?Q?K/8IJAV7mkbqCkxa+9p/WlQjy2TJmA4MzVkz6/NKQ/rCLClGUlcNPLj6Qprw?= =?us-ascii?Q?34bSGdqgbIWRMcWoGvXoZJYl9y2s67MjwzObP9kMi0+yiTHWaqDCUC9qAlJB?= =?us-ascii?Q?g9vEpPmuQDzooOjNmxXXExpTDo+nqLW4cWSAljPorNFzRCLrVsZb4ikz31SU?= =?us-ascii?Q?xGZmBKjCP3YPovd0196An8uY6MqWjVJjpSN/l6hXx9kO38Q8rVJAsRfupEZc?= =?us-ascii?Q?5ZyJ4Xf+mq/X8wZHJBJfZSAotm3BLtyWjDVsmyF9J4+SL1nyL+5LrQnRod3b?= =?us-ascii?Q?zkUEoDMLsDA35NRGWudvf1tPRpiginCdw+UPejul2X8Qp+B1Bl+4hAx1zNbu?= =?us-ascii?Q?o4Zvm5Pf1CknfJECzElJ94HsDtp6UMEqwmRB/fDDP29P/KYuG7SGVTTXJWvu?= =?us-ascii?Q?bnj69wcSgNTzZHb5OVYWB+hjLdGgPafNo+MSscee5Z6f/iTpe0isrdC9h5z9?= =?us-ascii?Q?2++p8q3dY+wKR2oSSDgFBiY0st8kgvB/Dp1Nc1hJfscYjrBgXdCK+5RJNeQX?= =?us-ascii?Q?ePwEDAnzFLc3+NyQiZL814Zwj7CdH5K2XAmYJrEB2rXxaymHUcdu/dfZ3AL+?= =?us-ascii?Q?Hp4wnLzfn0YB6c6VDwx8Z1lSZXQZIqjq6qD2dzJnNhcmgZ+8XgWL/2GgILv1?= =?us-ascii?Q?ZG0ony0vtWlYwLcOt+knGK4uARvy?= X-Forefront-Antispam-Report: CIP:255.255.255.255;CTRY:;LANG:en;SCL:1;SRV:;IPV:NLI;SFV:NSPM;H:PH8PR11MB8107.namprd11.prod.outlook.com;PTR:;CAT:NONE;SFS:(13230040)(366016)(1800799024)(7416014)(376014)(7053199007);DIR:OUT;SFP:1101; X-MS-Exchange-AntiSpam-MessageData-ChunkCount: 1 X-MS-Exchange-AntiSpam-MessageData-0: =?us-ascii?Q?eyJwgWVDdUUmpVLs7IQR/ZGD6Ryy6zAgmctZxPYQEKVYOz6mhpEg0ma5CC0D?= =?us-ascii?Q?j1hwBcorttqENBwWkWbZcycwi72iYsjE+wEwDV6EFeDEz6hbVc6MDKCHW1Hd?= =?us-ascii?Q?aoa9vbkHazLIa+HohFha+tvzUySKOXoIUQbA7pDZMj/2CQ/NfxC807/GZD1n?= =?us-ascii?Q?nBlyafBhm4/R/JZOGCP30aBPKKwBoqOXbUn6sNBY+aSfyMp/nhitD8dkbHis?= =?us-ascii?Q?sgVpeH8Vwtb6U+Qwj1zvfMvtT0ZSZywYHjhsHe+qMnIy11nlN1SKLaQtZ6Hp?= =?us-ascii?Q?mOACl5cY3slMJZQHu5vgNEA5i+15cqN3tb/sRx2MubmOYOQ8YjO6WEmQVG/a?= =?us-ascii?Q?uQM1d7Ef237anFKxDMqMWw5+PGXbGbSJZlY37I4PwmBWnmI4pOJoc/I/MWHU?= =?us-ascii?Q?g1BYS5MHiWorh2VB4FkG346mgAjyZ+hePtZDZntLPMl4XiHce0w59tCDsNUq?= =?us-ascii?Q?tRU4w1z44BfPmOXV/nZlURPSlG/R7nZ5AcvmHSflDg2Xv2Y8aevjUUXIovYF?= =?us-ascii?Q?KEqXmpJUEulAczRyHUxn5gRZOr5TmniIBlHo/JD39uOI2SWakEBRSnNt2QrI?= =?us-ascii?Q?ZytPzQQAGAyKkgj/HB9bvtyqe/tqV+kvVW8ERvbk4tVNqYIgccE/biw9iouS?= =?us-ascii?Q?88N7qqS377LUnAKAlKREgrTRWAUW4NlgAP5GdFOwvZZDQsqVEfmiKRwT2dyi?= =?us-ascii?Q?3Hhmc4qXFzULSJjE77RPUlC4WHxOTBOuqDselwr37//oIqnAqQYfUrbXtfIJ?= =?us-ascii?Q?oNLmqk4QbcQM/7qSlcIHkDvU8yIbMKFJJY+XPjMPxGE0v449eLD4gfWe14zO?= =?us-ascii?Q?1XRfucYh7q+i0x+j7H1MJ/QoUlyfnquGN7cQTpgKIS9I7ecdvt99gGakq4y6?= =?us-ascii?Q?5un4SvfRDnxtlzZLrUtDxgtBitoHoLkBiBz8yg+q90ALl+i+4awaJhxSk37T?= =?us-ascii?Q?LzyClImWj07nwQfZXDHSO/+deNQFLBQ2BVqrt+Mkuo4gXuKUuGxua+mcPvx2?= =?us-ascii?Q?0F6hLWYkJm2+226tDdOFljsLvu7PA3fBAVuKwAVz0G3NcNnOePHHMXu5gZw1?= =?us-ascii?Q?cwcxPB9Wy93X19W2B73GDfdETV4o2FZXRwrOLH/IBR0g81JQ4veHaF0s6UpE?= =?us-ascii?Q?piAsQIcZStfmiA/JOPqREckyMu3qKmfz7q8UP33PSbgUJ/0gGb6+bC52BwUD?= =?us-ascii?Q?/rrNc+vqujkrXG5dV0RipWY4uFGQ4ClfRxv7vKnbBum6YkRN+Bf4/cZnOvya?= =?us-ascii?Q?nVYPaNYLm981yTB70cfHGNyNoxL9MZpQG4kAtrecws4Jo+pqDNFsaZmYFMHf?= =?us-ascii?Q?3GVSouUG0GRxqS1Ak93WY5IL5hI/yQvE98W7f5NQ0wM+xGoFrB2w4IfQPw2u?= =?us-ascii?Q?z6IJtmgM5KFt0DcEUuUTbAJXIBNIZSXto/rvrgBVvyTi0BGpaY42HmItpu/l?= =?us-ascii?Q?SBjZQAvU43p5NZp6/g1XNrnR6msLBZbEz/prYE6VOGo81LBvuU9tGpxHDlMQ?= =?us-ascii?Q?ckrBoaId162K+spFtKpr+5ZBXXsCfMCXBbxARwAuqJhGOEvfA7HHMJhLQXP2?= =?us-ascii?Q?SP2Awb/j0/fVvd+HVSG8KujKMARnL0HaeLFflIX3v0ekEbdvQoBsWFE1rJVc?= =?us-ascii?Q?QA=3D=3D?= X-MS-Exchange-CrossTenant-Network-Message-Id: 515e4374-cbbe-423a-22fb-08dd343fc18e X-MS-Exchange-CrossTenant-AuthSource: PH8PR11MB8107.namprd11.prod.outlook.com X-MS-Exchange-CrossTenant-AuthAs: Internal X-MS-Exchange-CrossTenant-OriginalArrivalTime: 14 Jan 2025 02:04:19.3758 (UTC) X-MS-Exchange-CrossTenant-FromEntityHeader: Hosted X-MS-Exchange-CrossTenant-Id: 46c98d88-e344-4ed4-8496-4ed7712e255d X-MS-Exchange-CrossTenant-MailboxType: HOSTED X-MS-Exchange-CrossTenant-UserPrincipalName: lQszmjVNr7m1aLdBg51qUXMa7Z5cqLw1UNFkN5swqnlE3N6XeiAzIbbwnQTECX63RaaxtczsyLVlFBEeWIQcrMPL/8QK35ZmPJOieY/UtzM= X-MS-Exchange-Transport-CrossTenantHeadersStamped: DS7PR11MB7781 X-OriginatorOrg: intel.com X-Rspamd-Server: rspam02 X-Rspamd-Queue-Id: 7069C20003 X-Stat-Signature: f61kis894bqf3hjhrzzkec7q6sqmq9xf X-Rspam-User: X-HE-Tag: 1736820328-365302 X-HE-Meta: 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 yfStiA4Y 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 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: List-Subscribe: List-Unsubscribe: Alistair Popple wrote: > Currently DAX folio/page reference counts are managed differently to > normal pages. To allow these to be managed the same as normal pages > introduce vmf_insert_folio_pmd. This will map the entire PMD-sized folio > and take references as it would for a normally mapped page. > > This is distinct from the current mechanism, vmf_insert_pfn_pmd, which > simply inserts a special devmap PMD entry into the page table without > holding a reference to the page for the mapping. > > Signed-off-by: Alistair Popple > > --- > > Changes for v5: > - Minor code cleanup suggested by David > --- > include/linux/huge_mm.h | 1 +- > mm/huge_memory.c | 54 ++++++++++++++++++++++++++++++++++-------- > 2 files changed, 45 insertions(+), 10 deletions(-) > > diff --git a/include/linux/huge_mm.h b/include/linux/huge_mm.h > index 5bd1ff7..3633bd3 100644 > --- a/include/linux/huge_mm.h > +++ b/include/linux/huge_mm.h > @@ -39,6 +39,7 @@ int change_huge_pmd(struct mmu_gather *tlb, struct vm_area_struct *vma, > > vm_fault_t vmf_insert_pfn_pmd(struct vm_fault *vmf, pfn_t pfn, bool write); > vm_fault_t vmf_insert_pfn_pud(struct vm_fault *vmf, pfn_t pfn, bool write); > +vm_fault_t vmf_insert_folio_pmd(struct vm_fault *vmf, struct folio *folio, bool write); > vm_fault_t vmf_insert_folio_pud(struct vm_fault *vmf, struct folio *folio, bool write); > > enum transparent_hugepage_flag { > diff --git a/mm/huge_memory.c b/mm/huge_memory.c > index 256adc3..d1ea76e 100644 > --- a/mm/huge_memory.c > +++ b/mm/huge_memory.c > @@ -1381,14 +1381,12 @@ static void insert_pfn_pmd(struct vm_area_struct *vma, unsigned long addr, > { > struct mm_struct *mm = vma->vm_mm; > pmd_t entry; > - spinlock_t *ptl; > > - ptl = pmd_lock(mm, pmd); Apply this comment to the previous patch too, but I think this would be more self-documenting as: lockdep_assert_held(pmd_lock(mm, pmd)); ...to make it clear in this diff and into the future what the locking constraints of this function are. After that you can add: Reviewed-by: Dan Williams