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]) (using TLSv1 with cipher DHE-RSA-AES256-SHA (256/256 bits)) (No client certificate requested) by smtp.lore.kernel.org (Postfix) with ESMTPS id 7DAD7CAC581 for ; Mon, 8 Sep 2025 11:12:19 +0000 (UTC) Received: by kanga.kvack.org (Postfix) id D72948E001A; Mon, 8 Sep 2025 07:12:18 -0400 (EDT) Received: by kanga.kvack.org (Postfix, from userid 40) id D23638E0019; Mon, 8 Sep 2025 07:12:18 -0400 (EDT) X-Delivered-To: int-list-linux-mm@kvack.org Received: by kanga.kvack.org (Postfix, from userid 63042) id B9D578E001A; Mon, 8 Sep 2025 07:12:18 -0400 (EDT) X-Delivered-To: linux-mm@kvack.org Received: from relay.hostedemail.com (smtprelay0011.hostedemail.com [216.40.44.11]) by kanga.kvack.org (Postfix) with ESMTP id 9E3A98E0019 for ; Mon, 8 Sep 2025 07:12:18 -0400 (EDT) Received: from smtpin11.hostedemail.com (a10.router.float.18 [10.200.18.1]) by unirelay03.hostedemail.com (Postfix) with ESMTP id 4AF96BCCFD for ; Mon, 8 Sep 2025 11:12:18 +0000 (UTC) X-FDA: 83865819156.11.DB153C8 Received: from mx0b-00069f02.pphosted.com (mx0b-00069f02.pphosted.com [205.220.177.32]) by imf15.hostedemail.com (Postfix) with ESMTP id 03334A000D for ; Mon, 8 Sep 2025 11:12:14 +0000 (UTC) Authentication-Results: imf15.hostedemail.com; dkim=pass header.d=oracle.com header.s=corp-2025-04-25 header.b=V2ELfmPU; dkim=pass header.d=oracle.onmicrosoft.com header.s=selector2-oracle-onmicrosoft-com header.b=kaNCp8a8; spf=pass (imf15.hostedemail.com: domain of lorenzo.stoakes@oracle.com designates 205.220.177.32 as permitted sender) smtp.mailfrom=lorenzo.stoakes@oracle.com; dmarc=pass (policy=reject) header.from=oracle.com; arc=pass ("microsoft.com:s=arcselector10001:i=1") ARC-Message-Signature: i=2; a=rsa-sha256; c=relaxed/relaxed; d=hostedemail.com; s=arc-20220608; t=1757329935; 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:content-transfer-encoding: in-reply-to:in-reply-to:references:references:dkim-signature; bh=9v/S0HijuZx48o0CV+CH9/1aWShLqW/UqAjNwlpndr8=; b=yFiF9lwW/Vsy4k6V7n10DTvDAafAu6lFkVJQgrC1Yxrgv+4uBWPNoS4nOoqmH/HKHD2f/8 eJ6e/GVu69oDfLuL8IUxoIejvCpw8oRnE/MMDBXG/pcJ55R1uJSEKIrf1Gk1BjDw3+ny+l GCMilx2UAP+WOxQ234Qc3Z6+x9QKb7Q= ARC-Authentication-Results: i=2; imf15.hostedemail.com; dkim=pass header.d=oracle.com header.s=corp-2025-04-25 header.b=V2ELfmPU; dkim=pass header.d=oracle.onmicrosoft.com header.s=selector2-oracle-onmicrosoft-com header.b=kaNCp8a8; spf=pass (imf15.hostedemail.com: domain of lorenzo.stoakes@oracle.com designates 205.220.177.32 as permitted sender) smtp.mailfrom=lorenzo.stoakes@oracle.com; dmarc=pass (policy=reject) header.from=oracle.com; arc=pass ("microsoft.com:s=arcselector10001:i=1") ARC-Seal: i=2; s=arc-20220608; d=hostedemail.com; t=1757329935; a=rsa-sha256; cv=pass; b=Yqix7p+FtLskSFwB1ODypyvARaWKc1mWPRLR1I1zIUzHmxmbhg89vwfy6ctGt0dnpqK35/ sPAjXHXttG0CEFDkX5I0MO9YymDh98MMCZDCXb2PE0N/KMp6rd45+Dt2pie38bknyjrrRP ZpMPl7wD6p238dld7rEeJ+pEcFf05rU= Received: from pps.filterd (m0333520.ppops.net [127.0.0.1]) by mx0b-00069f02.pphosted.com (8.18.1.2/8.18.1.2) with ESMTP id 588B9NC9008176; Mon, 8 Sep 2025 11:11:59 GMT DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=oracle.com; h=cc :content-transfer-encoding:content-type:date:from:in-reply-to :message-id:mime-version:references:subject:to; s= corp-2025-04-25; bh=9v/S0HijuZx48o0CV+CH9/1aWShLqW/UqAjNwlpndr8=; b= V2ELfmPU2kY/LUCNvzouSkcKBlKHVNkj3Ui8Fq5fscRnhAVIPU17McfztqFD+/qF wyI9s0snYYFRnXY2fuWqa4miH4Opd9QHTY+PURAtg/mP4XmK+DkPY5a6HE7Ir+jY KVb397+xRqjPJ6V+TrwFp4Y7EbaN1wrrTmK+kfr41a8/iv5apimJ2lJ3N6qIgVQs szWc1+YdTuS9fIV9FdabOA4zJi1tBHJfm1pqjhzGkgXsnUIBdzS6EDcFRhHdJXfl VwvNXQCqiIlzQ3a/y4h57PHAsrgmSSK3iggFwQffIzmRaGfPukif8dvLur9/7xUP FAuqts23rAEWOEKfWAvJ0w== Received: from iadpaimrmta03.imrmtpd1.prodappiadaev1.oraclevcn.com (iadpaimrmta03.appoci.oracle.com [130.35.103.27]) by mx0b-00069f02.pphosted.com (PPS) with ESMTPS id 491x16g04h-1 (version=TLSv1.2 cipher=ECDHE-RSA-AES256-GCM-SHA384 bits=256 verify=OK); Mon, 08 Sep 2025 11:11:58 +0000 (GMT) Received: from pps.filterd (iadpaimrmta03.imrmtpd1.prodappiadaev1.oraclevcn.com [127.0.0.1]) by iadpaimrmta03.imrmtpd1.prodappiadaev1.oraclevcn.com (8.18.1.2/8.18.1.2) with ESMTP id 588AV27I002883; Mon, 8 Sep 2025 11:11:57 GMT Received: from nam04-mw2-obe.outbound.protection.outlook.com (mail-mw2nam04on2088.outbound.protection.outlook.com [40.107.101.88]) by iadpaimrmta03.imrmtpd1.prodappiadaev1.oraclevcn.com (PPS) with ESMTPS id 490bdej0pt-1 (version=TLSv1.2 cipher=ECDHE-RSA-AES256-GCM-SHA384 bits=256 verify=OK); Mon, 08 Sep 2025 11:11:57 +0000 ARC-Seal: i=1; a=rsa-sha256; s=arcselector10001; d=microsoft.com; cv=none; b=H5b3v8Fqla5Op8JSTQKU1rTpLCQUs/vZ6Lq1l1bAyjLkyxockwR/cp7+Q2K1slXKmUb5Irk92LC3MA11mM4eI+UvsGz71/fux63JemtoGhcZpg70EbetUDF5XVR+Eg1BCPm3jOyMd/amzFUknLewdfsIXfQXjIl9SXmvFdYNo4CSIOc8EGiDd4ZKOR+4cwF/Up9rrKhAJsL9A36wnqbz0cjWFEgiFJhqlqWmltOu9dYOJfnHmZ2Y/L+7VpaS22zqM23IFEVfEX0p+jOKY7SFMfbgw8BDQBVDi3oX72dSpg9Wg/dJ3tPjwJqyJn6ml/cUqPhpfJcngFFiItRMYpuvsg== 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=9v/S0HijuZx48o0CV+CH9/1aWShLqW/UqAjNwlpndr8=; b=Y8Z/18NLFaiQdW3Tz/Kqn7XRlpHh4nEFs/KOMfyEH+rOPgTUoRdtyj5E9elejhZwdTubhmijP+5L/TOAynDD6SgWKFOPKsA76v8uYm3dWZrOlbpSNYe/L8GbtrX1q5ERK/Irjw2v8+Xhnaezl/r+qEx8Ms+vvISh1mEjJ2MpLi8eD+fhZ3yMKYAqP/DlvbDyZbiXm1MrFeFJMCnLJLdwJJcBMe1T/b5AgFS1TDVRoLlIYHmH5x7Vxfz3ZBcyf0N6p+qgJNFINiYeo75XCCZy3xJ6dDXFUeusC082mtEs5xKuJZscnPwkrg3NG+0Q7SYjweJW7R9XLRuRkpfsCZCLmQ== ARC-Authentication-Results: i=1; mx.microsoft.com 1; spf=pass smtp.mailfrom=oracle.com; dmarc=pass action=none header.from=oracle.com; dkim=pass header.d=oracle.com; arc=none DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=oracle.onmicrosoft.com; s=selector2-oracle-onmicrosoft-com; h=From:Date:Subject:Message-ID:Content-Type:MIME-Version:X-MS-Exchange-SenderADCheck; bh=9v/S0HijuZx48o0CV+CH9/1aWShLqW/UqAjNwlpndr8=; b=kaNCp8a8JGqXKwH4BQ+uxVi1BKupXTjR1nSLJTnlokQ9rIAim1KZBT1oUZNsTLskQAWz6c9SpD5t0gnUwQ/to5FewrgJgqh5M4SVDLlXRRuv7ZK1rZ70kM0wJqh3nKzPm+BYg/xQl0l3O0ddPt7D4v5nJdH+iHmIBGZSXJLkLhA= Received: from DM4PR10MB8218.namprd10.prod.outlook.com (2603:10b6:8:1cc::16) by CY8PR10MB6588.namprd10.prod.outlook.com (2603:10b6:930:57::21) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id 15.20.9094.19; Mon, 8 Sep 2025 11:11:48 +0000 Received: from DM4PR10MB8218.namprd10.prod.outlook.com ([fe80::2650:55cf:2816:5f2]) by DM4PR10MB8218.namprd10.prod.outlook.com ([fe80::2650:55cf:2816:5f2%5]) with mapi id 15.20.9094.018; Mon, 8 Sep 2025 11:11:47 +0000 From: Lorenzo Stoakes To: Andrew Morton Cc: Jonathan Corbet , Matthew Wilcox , Guo Ren , Thomas Bogendoerfer , Heiko Carstens , Vasily Gorbik , Alexander Gordeev , Christian Borntraeger , Sven Schnelle , "David S . Miller" , Andreas Larsson , Arnd Bergmann , Greg Kroah-Hartman , Dan Williams , Vishal Verma , Dave Jiang , Nicolas Pitre , Muchun Song , Oscar Salvador , David Hildenbrand , Konstantin Komarov , Baoquan He , Vivek Goyal , Dave Young , Tony Luck , Reinette Chatre , Dave Martin , James Morse , Alexander Viro , Christian Brauner , Jan Kara , "Liam R . Howlett" , Vlastimil Babka , Mike Rapoport , Suren Baghdasaryan , Michal Hocko , Hugh Dickins , Baolin Wang , Uladzislau Rezki , Dmitry Vyukov , Andrey Konovalov , Jann Horn , Pedro Falcato , linux-doc@vger.kernel.org, linux-kernel@vger.kernel.org, linux-fsdevel@vger.kernel.org, linux-csky@vger.kernel.org, linux-mips@vger.kernel.org, linux-s390@vger.kernel.org, sparclinux@vger.kernel.org, nvdimm@lists.linux.dev, linux-cxl@vger.kernel.org, linux-mm@kvack.org, ntfs3@lists.linux.dev, kexec@lists.infradead.org, kasan-dev@googlegroups.com, Jason Gunthorpe Subject: [PATCH 12/16] mm: update resctl to use mmap_prepare, mmap_complete, mmap_abort Date: Mon, 8 Sep 2025 12:10:43 +0100 Message-ID: X-Mailer: git-send-email 2.51.0 In-Reply-To: References: Content-Transfer-Encoding: 8bit Content-Type: text/plain X-ClientProxiedBy: GVZP280CA0006.SWEP280.PROD.OUTLOOK.COM (2603:10a6:150:273::12) To DM4PR10MB8218.namprd10.prod.outlook.com (2603:10b6:8:1cc::16) MIME-Version: 1.0 X-MS-PublicTrafficType: Email X-MS-TrafficTypeDiagnostic: DM4PR10MB8218:EE_|CY8PR10MB6588:EE_ X-MS-Office365-Filtering-Correlation-Id: eed5b1b8-e6ea-4d3f-dd40-08ddeec880a7 X-MS-Exchange-SenderADCheck: 1 X-MS-Exchange-AntiSpam-Relay: 0 X-Microsoft-Antispam: BCL:0;ARA:13230040|366016|1800799024|7416014|376014; X-Microsoft-Antispam-Message-Info: =?us-ascii?Q?smSZkV50Tz4r5m+JGVasLtnD63A381c4uH2h22Bxp9UUpvC3pDTXFFJQO9/B?= =?us-ascii?Q?j9kLMJIEa5H60C04DZu0Zm7zxBImu25m99AD7sB1diap0sR30WwWRVBKp33E?= =?us-ascii?Q?p0Ik2jY0+z4GTCcgvCzrhJ9U9IJjJ/exaF4NakR2KlXlAvN9JhHmfqcUuz6z?= =?us-ascii?Q?MonsJBbaitHdjgxMc79jXGMwoCd5+jqCFNGIWQkxV7mHrv4GSPkdQeNjF8h2?= =?us-ascii?Q?b3RYf5zZ3WZIqlig6jkxjL6StIjA324G8PgO3eib2drg+4tLt5L7Qk+9hJLD?= =?us-ascii?Q?SixXLZIXnmkgY5YzOXPV76If7tsz+Kg5OQylGPuqup5YNt+vmDJstQ9x+T79?= =?us-ascii?Q?rOclpFysbMdRBYXWY5hQiDFWUIDK3rAJrp0tdgZiryNiItVa2C/YVI2iMBFk?= =?us-ascii?Q?DzrBPuAuXJQpgo9yPx2u0Ozh7pfY+VZ/aGu3RbtHFTQZmjjwGRUbfUqyLvja?= =?us-ascii?Q?DlLLjgcq8D6VcPiUFMvDMvtnXucNHn9I2nCGLQ98fhNsDwh4pI1IIZ1kVDRK?= =?us-ascii?Q?rWzdQ/5PxrasSmpIAoiulfsoker/8QbvnMqOwNzym6zs+E7xJLSPB0owNKqz?= =?us-ascii?Q?AcpL0dXTagX7+yLXttAoLZoAoh+hq80zNs/YKj0B6nX//FOBIQC//XufHPXY?= =?us-ascii?Q?pX+KEHU93J92Br6WG6XNSwnPRhNZHu4BH66zyori7jalk5z7MU8zpjIa0Zo8?= =?us-ascii?Q?Gz5AolD4yRgCMEfGeCMqGGOaoP3e7NXXWVBgDxewbh85Ebavpmcl1Hv77Uml?= =?us-ascii?Q?0XgAm/cvq+hLyc1mZzxKB51t3Uj9TagDunQPmUkVujO0BvJharJlx445dxIY?= =?us-ascii?Q?XaQZwq2ahXBkFeAyngLAk+r305+wKa+Vve1K2vjWqOSDY3N+TN/LJ12jKAsQ?= =?us-ascii?Q?9HSbxAXsx560x+DP0BTrg53d+9em6+Iemz9lDs7z5PVWUyhOVAiC5gA5jaeA?= =?us-ascii?Q?pWJ0RuYcwPSDta8BU8UitfEjFgJBOYI9NrqYb4yzdwwjLUEQfeR5TOLjLn2F?= =?us-ascii?Q?rEo1Fjj+byX5P7oNzG2mY2ffA10aSV7aX7TSdIoHG1lU4JXYYoZIghhw4UNN?= =?us-ascii?Q?238AarrQlL8AI4Y4BTLAtYs5hy0sVBQNBrshHBhoK8COa8F4qUv2VkEJpCPn?= =?us-ascii?Q?fsv+kQpjoQmKAYTkhT/+u5Rf8Un8hMUn9qe3IleBIN1kdZjPTNpkG5ZfpAdL?= =?us-ascii?Q?9Zxutq5jaBI7B4eE3JDwQsh/p/vNxstjkcX8eFU/WD3fxmQj8bWj7DBuoxjS?= =?us-ascii?Q?vLCSPdMpQY0cBHj+6zIiPHB+Am89UcyUQVTSF5eNMwA7Gw8SwYM/kUShKtvZ?= =?us-ascii?Q?jpwDxpB9ZqKn8rMqELN8FH04AzvFpgV2sklXrj2khfCjF6TsKjLj5pZkeyht?= =?us-ascii?Q?gWKWnC+JZzjCeFHbI0biCBVheTp6q4meUBSlsu6yzSfjxj1xlnWK6e33BtoJ?= =?us-ascii?Q?7u37vjPlI3o=3D?= X-Forefront-Antispam-Report: CIP:255.255.255.255;CTRY:;LANG:en;SCL:1;SRV:;IPV:NLI;SFV:NSPM;H:DM4PR10MB8218.namprd10.prod.outlook.com;PTR:;CAT:NONE;SFS:(13230040)(366016)(1800799024)(7416014)(376014);DIR:OUT;SFP:1101; X-MS-Exchange-AntiSpam-MessageData-ChunkCount: 1 X-MS-Exchange-AntiSpam-MessageData-0: =?us-ascii?Q?tba97pnUb3SXA8JlAETIHZjtb+G7nlp5yNiCayFMmCheIScmbwH0TubckHQl?= =?us-ascii?Q?4p56xnkTk4hu4FAZTcsVP0sxpv8vHxWYR1doL8wByCCwPS3Sk2MMXI2/ApfJ?= =?us-ascii?Q?wTjUiO+/HgnJPQSCMtVR2inLtz250S16Ur4N/9aHgmJiGllXRT+FaDLbUVFF?= =?us-ascii?Q?NenBEo5QTZy0W5Zn0xBNCknqYujN61DeOENduZ+G45TNcE5MTG1J1+OfUB/i?= =?us-ascii?Q?JFTWQ+oZoKLJ1z+VMcFq2iOgZjizBsshoKF7q2aZzK3dBaBMIrlWb/Qb26P7?= =?us-ascii?Q?kaT3X/9OdS6uGKRM5uDC6xM8NlxEqC6G6jS0CYcEGY9eZZpOdO0XlNqSTwax?= =?us-ascii?Q?Qu9IjgLZvggH8EJXI8N+qolSRbcQzFD4bDP3v/40O6P+XDBsDCUmMHluxD3P?= =?us-ascii?Q?rbYG3inM6x0LX6hN4J0UcKcnvziY8qo/08PLNz2GY4q07BThdkqQlhNmKUd9?= =?us-ascii?Q?SFWrnGLVwPUXVj9tHhhIuAi+INcl5t1/G4/2mhJ8Oa0+qn5aIc6hrYxrxkGG?= =?us-ascii?Q?jCeB381JL0fAofo4snS9pmjJ3qe5aZBJ2nak89i6W2Utt/iw1FaUPkj2otmO?= =?us-ascii?Q?EulHT8uyWAaX1E7daV4EfXocOQqa4IeYWHbekCtnFkaaTXHYn5pzsMKMKDLg?= =?us-ascii?Q?uk5KhA7eeobAbEXZ0xgjiH2T0prSFtVZ/BFDK+nA/S5rgZAjXrBehzEmkq5Q?= =?us-ascii?Q?4q0447QQvQIOCbq3/IWMMUatdJiFjTeqV8Kxlmb8o8exRDmVASA6XzFf6l7t?= =?us-ascii?Q?6fVjtpKAVhGnptC0mMlGKXg7iGasPWcyIB958gJtf+u2nYcdwuNRvpghjUrN?= =?us-ascii?Q?5D4R4HkJIR7vBrOpJa5x0K9hIWJGsa2QKweVpLjleEdvHNjqja4O8kGAUlNs?= =?us-ascii?Q?McHCq/43cQg99uwEZ2p2PRfcM8Y8AW9/TvIBYoKRAlGm38z39bV79B17PHet?= =?us-ascii?Q?yqGKP5k7kZqKZaDpGUgODnnbDI+K+sjXuW6xFLHybVTg16FQ7DVmXepv5Ms3?= =?us-ascii?Q?kUbGF+LdsJJh3FwMY8nFWY3AkhQL6Nu8gWuI0eUQ14JHROY5rN6lfdtgmIFL?= =?us-ascii?Q?5zERDZS6yLrSMIoBPjE6S++lfvu+0OMKSp7Qfy19EC351Q6odYZb9YsLlewM?= =?us-ascii?Q?fgYagqgVUqCfQfW96TegbEk/Pbcq79ZgKtHfyuFlCFvFtmY/DOs34V4mRK8S?= =?us-ascii?Q?tAZXchLCqDnlxY1ogKghN2OubZjdKF5grlYcYXjRYaLT68Q163h2711EGUqW?= =?us-ascii?Q?2VI5DVCTJi7lXJjk3xVtrNePDT+iqEuuLNliqIS6Dr/l1ZP28ZzkSts8CENo?= =?us-ascii?Q?MHir+BXETraFQtC2xgnu3lf2S7IcbhIY0H8EpEOa1zMxS3Njusu5n3MmBxLs?= =?us-ascii?Q?Vk14Zf6SR+q5XnVMKZEFEyY/FtYW4s1BF5nw9A8Gjy+/eDevwwwQ+7LrKQOc?= =?us-ascii?Q?px4syMKnD5atEH932iOZhoa5JWPWb16vMTt81vnFzSV7vXOrt8ffLb3E0WLg?= =?us-ascii?Q?sCXfzqZnOvsiuG3fZMXeroBmETmTtE8Ul5aDN1hpHL1R5k/ucsIo6SV/v4xo?= =?us-ascii?Q?RFo7Wtaj3r9qIJ7pK5l4yWeGfVrZWTuzND7Wz0F7SJ+7fYV7ilOtFAPy1o02?= =?us-ascii?Q?hw=3D=3D?= X-MS-Exchange-AntiSpam-ExternalHop-MessageData-ChunkCount: 1 X-MS-Exchange-AntiSpam-ExternalHop-MessageData-0: 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 X-OriginatorOrg: oracle.com X-MS-Exchange-CrossTenant-Network-Message-Id: eed5b1b8-e6ea-4d3f-dd40-08ddeec880a7 X-MS-Exchange-CrossTenant-AuthSource: DM4PR10MB8218.namprd10.prod.outlook.com X-MS-Exchange-CrossTenant-AuthAs: Internal X-MS-Exchange-CrossTenant-OriginalArrivalTime: 08 Sep 2025 11:11:47.7638 (UTC) X-MS-Exchange-CrossTenant-FromEntityHeader: Hosted X-MS-Exchange-CrossTenant-Id: 4e2c6054-71cb-48f1-bd6c-3a9705aca71b X-MS-Exchange-CrossTenant-MailboxType: HOSTED X-MS-Exchange-CrossTenant-UserPrincipalName: MkD8+sCiAxO0EG56FY/W61YI/t5QnwZniGkk/Uz8TKh77S8jhoHgqz8UJnNBljgZwKBXucX9Er8rdVL68gKdKm/NsjEBICwDjJbmWdN27aA= X-MS-Exchange-Transport-CrossTenantHeadersStamped: CY8PR10MB6588 X-Proofpoint-Virus-Version: vendor=baseguard engine=ICAP:2.0.293,Aquarius:18.0.1117,Hydra:6.1.9,FMLib:17.12.80.40 definitions=2025-09-08_04,2025-09-08_01,2025-03-28_01 X-Proofpoint-Spam-Details: rule=notspam policy=default score=0 spamscore=0 adultscore=0 suspectscore=0 bulkscore=0 mlxscore=0 mlxlogscore=999 phishscore=0 malwarescore=0 classifier=spam adjust=0 reason=mlx scancount=1 engine=8.12.0-2508110000 definitions=main-2509080113 X-Authority-Analysis: v=2.4 cv=ULPdHDfy c=1 sm=1 tr=0 ts=68beb9fe b=1 cx=c_pps a=qoll8+KPOyaMroiJ2sR5sw==:117 a=qoll8+KPOyaMroiJ2sR5sw==:17 a=6eWqkTHjU83fiwn7nKZWdM+Sl24=:19 a=z/mQ4Ysz8XfWz/Q5cLBRGdckG28=:19 a=lCpzRmAYbLLaTzLvsPZ7Mbvzbb8=:19 a=wKuvFiaSGQ0qltdbU6+NXLB8nM8=:19 a=Ol13hO9ccFRV9qXi2t6ftBPywas=:19 a=xqWC_Br6kY4A:10 a=yJojWOMRYYMA:10 a=GoEa3M9JfhUA:10 a=yPCof4ZbAAAA:8 a=myPxDGlX7jRLdnKhP7EA:9 cc=ntf awl=host:12069 X-Proofpoint-Spam-Details-Enc: AW1haW4tMjUwOTA4MDExMiBTYWx0ZWRfX1IzPi2/mzBSH NQLTB73zSYiMOqMev356n6xD93bUFENUh4Uj0WLSsNVj+FY+1Za4Y0O4c8AEhD4hSI11JQOFuks rEJ3JXYNz90+mz8LaFWbBm13ECQJSKBhcClWyctfxS8idUmD5avu0Kc5Gz4OzSobJztwxIpELtZ 2vUuPOOI/YsOFbOKM81shVVuIEngO3S4pWCXYXssYI2u99xorw2JmRyo9MAlTYwmQjLY61z1uZA bTMfsT681ov0Us2wAh0PdNSS8iRPp/ZMCGWzvLWCCAvaTJ0hLnbbr7enzzp7QOKoJKvTXcM/9R5 XAaAGeqVmD0Y55oTaTtJ6CXshkGYxCvpEUuSyOHn19mBtFBEIfKB5Aj/huIwhK7ygK/s6LOqWdZ h+yKbHhzxdJPeDegLfkQkhb0CrV+cA== X-Proofpoint-GUID: 62qJ_PJK6dKNARN2HkIbo2Fmi-nXKqvL X-Proofpoint-ORIG-GUID: 62qJ_PJK6dKNARN2HkIbo2Fmi-nXKqvL X-Rspamd-Server: rspam02 X-Rspamd-Queue-Id: 03334A000D X-Stat-Signature: bztupwpg7y99srawuyg8ffkxuko9tteg X-Rspam-User: X-HE-Tag: 1757329934-590845 X-HE-Meta: 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 NRQaChBR 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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: resctl uses remap_pfn_range(), but holds a mutex over the operation. Therefore, establish the mutex in mmap_prepare(), release it in mmap_complete() and release it in mmap_abort() should the operation fail. Otherwise, we simply make use of the remap_pfn_range_[prepare/complete]() remap PFN range variants in an ordinary way. Signed-off-by: Lorenzo Stoakes --- fs/resctrl/pseudo_lock.c | 56 +++++++++++++++++++++++++++++++--------- 1 file changed, 44 insertions(+), 12 deletions(-) diff --git a/fs/resctrl/pseudo_lock.c b/fs/resctrl/pseudo_lock.c index 87bbc2605de1..6d18ffde6a94 100644 --- a/fs/resctrl/pseudo_lock.c +++ b/fs/resctrl/pseudo_lock.c @@ -995,7 +995,8 @@ static const struct vm_operations_struct pseudo_mmap_ops = { .mremap = pseudo_lock_dev_mremap, }; -static int pseudo_lock_dev_mmap(struct file *filp, struct vm_area_struct *vma) +static int pseudo_lock_dev_mmap_complete(struct file *filp, struct vm_area_struct *vma, + const void *context) { unsigned long vsize = vma->vm_end - vma->vm_start; unsigned long off = vma->vm_pgoff << PAGE_SHIFT; @@ -1004,6 +1005,40 @@ static int pseudo_lock_dev_mmap(struct file *filp, struct vm_area_struct *vma) unsigned long physical; unsigned long psize; + rdtgrp = filp->private_data; + plr = rdtgrp->plr; + + physical = __pa(plr->kmem) >> PAGE_SHIFT; + psize = plr->size - off; + + memset(plr->kmem + off, 0, vsize); + + if (remap_pfn_range_complete(vma, vma->vm_start, physical + vma->vm_pgoff, + vsize, vma->vm_page_prot)) { + mutex_unlock(&rdtgroup_mutex); + return -EAGAIN; + } + + mutex_unlock(&rdtgroup_mutex); + return 0; +} + +static void pseudo_lock_dev_mmap_abort(const struct file *filp, + const void *vm_private_data, + const void *context) +{ + mutex_unlock(&rdtgroup_mutex); +} + +static int pseudo_lock_dev_mmap_prepare(struct vm_area_desc *desc) +{ + unsigned long vsize = vma_desc_size(desc); + unsigned long off = desc->pgoff << PAGE_SHIFT; + struct file *filp = desc->file; + struct pseudo_lock_region *plr; + struct rdtgroup *rdtgrp; + unsigned long psize; + mutex_lock(&rdtgroup_mutex); rdtgrp = filp->private_data; @@ -1031,7 +1066,6 @@ static int pseudo_lock_dev_mmap(struct file *filp, struct vm_area_struct *vma) return -EINVAL; } - physical = __pa(plr->kmem) >> PAGE_SHIFT; psize = plr->size - off; if (off > plr->size) { @@ -1043,7 +1077,7 @@ static int pseudo_lock_dev_mmap(struct file *filp, struct vm_area_struct *vma) * Ensure changes are carried directly to the memory being mapped, * do not allow copy-on-write mapping. */ - if (!(vma->vm_flags & VM_SHARED)) { + if (!(desc->vm_flags & VM_SHARED)) { mutex_unlock(&rdtgroup_mutex); return -EINVAL; } @@ -1053,15 +1087,11 @@ static int pseudo_lock_dev_mmap(struct file *filp, struct vm_area_struct *vma) return -ENOSPC; } - memset(plr->kmem + off, 0, vsize); + /* No CoW allowed so don't need to specify pfn. */ + remap_pfn_range_prepare(desc, 0); + desc->vm_ops = &pseudo_mmap_ops; - if (remap_pfn_range(vma, vma->vm_start, physical + vma->vm_pgoff, - vsize, vma->vm_page_prot)) { - mutex_unlock(&rdtgroup_mutex); - return -EAGAIN; - } - vma->vm_ops = &pseudo_mmap_ops; - mutex_unlock(&rdtgroup_mutex); + /* mutex will be release in mmap_complete or mmap_abort. */ return 0; } @@ -1071,7 +1101,9 @@ static const struct file_operations pseudo_lock_dev_fops = { .write = NULL, .open = pseudo_lock_dev_open, .release = pseudo_lock_dev_release, - .mmap = pseudo_lock_dev_mmap, + .mmap_prepare = pseudo_lock_dev_mmap_prepare, + .mmap_complete = pseudo_lock_dev_mmap_complete, + .mmap_abort = pseudo_lock_dev_mmap_abort, }; int rdt_pseudo_lock_init(void) -- 2.51.0