From nobody Sat Feb 7 05:57:29 2026 Received: from mx0a-00069f02.pphosted.com (mx0a-00069f02.pphosted.com [205.220.165.32]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id DD1733A9012 for ; Wed, 21 Jan 2026 16:51:59 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=fail smtp.client-ip=205.220.165.32 ARC-Seal: i=2; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1769014321; cv=fail; b=PM83oJJlX9D6PSovKNPQzzaG/A9dFmncQfDuymz2FhaPr6MH2ZjqP/jb5k8cyEXNCFBuCvLF5O7LykwkNwDws3MT8f+jkaj9H8KsplWDZiRqX614cS0FH2wB6bfb6sj2ZkWUNN4lrqH4k4pmX9XhgvxyoyDRBJb2HrMHxb+fpwg= ARC-Message-Signature: i=2; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1769014321; c=relaxed/simple; bh=Yn8Vzp/G95al4LSQWWPOjBVCY62IpS5i2Z8dWP1bhaQ=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: Content-Type:MIME-Version; b=dwoF0uAv/SX3Yoxi9Vnj1J1z8ti2rt2IShqQod8j32BNo0DF+2tv/XrWJ58DxVhh/Z1H0/gkjUCseEvgZlQZg+IR3PjfKwo9UjerrKAeAQCp7+kk+Le6AKJ1qF4nxPQaMlzYqL+EmCoYCntbC3pywJal+eO+KzLSnF92tpwuGb0= ARC-Authentication-Results: i=2; smtp.subspace.kernel.org; dmarc=pass (p=reject dis=none) header.from=oracle.com; spf=pass smtp.mailfrom=oracle.com; dkim=pass (2048-bit key) header.d=oracle.com header.i=@oracle.com header.b=VmTaOgl+; dkim=pass (1024-bit key) header.d=oracle.onmicrosoft.com header.i=@oracle.onmicrosoft.com header.b=nLVVJRwr; arc=fail smtp.client-ip=205.220.165.32 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=reject dis=none) header.from=oracle.com Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=oracle.com Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=oracle.com header.i=@oracle.com header.b="VmTaOgl+"; dkim=pass (1024-bit key) header.d=oracle.onmicrosoft.com header.i=@oracle.onmicrosoft.com header.b="nLVVJRwr" Received: from pps.filterd (m0333521.ppops.net [127.0.0.1]) by mx0b-00069f02.pphosted.com (8.18.1.11/8.18.1.11) with ESMTP id 60LFIpPa3264903; Wed, 21 Jan 2026 16:50:59 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=vy3h/3dMA1JkUw6OcY2FbjpfJW8L8hjcjTXe8NStvfw=; b= VmTaOgl+xpDRz+Xd1CITyHG8Vc2omtlL13nMkCbBZw4OuQ3CUMaHUAiRK0jsg1y2 bSd8NOD85iRXnWw4oJEjSzVyrskKf7AlbVDLMzLroUJXb9cQ3tTmQUhoyT3qUUoc da3jieHzAeUWwluRQ1C7bbeqUPgwhzdP83ISlIUzzur8yeHFfatHoY6Qt3kObQPl +Flv1m073FLCVdXiysE4M6bK7JafaS0JLpkHwNb4j/MvwFkVEyC7Qpsy+LinTlSL 6Y+e2EYXen59VakhHzBauMRxGOo/E0JfvdYYK+IBE12z3WjoENO7QSmQZorStKy/ CYRAjDVq7ppQupLPlJRBOw== Received: from phxpaimrmta02.imrmtpd1.prodappphxaev1.oraclevcn.com (phxpaimrmta02.appoci.oracle.com [147.154.114.232]) by mx0b-00069f02.pphosted.com (PPS) with ESMTPS id 4br1b8e8j8-1 (version=TLSv1.2 cipher=ECDHE-RSA-AES256-GCM-SHA384 bits=256 verify=OK); Wed, 21 Jan 2026 16:50:59 +0000 (GMT) Received: from pps.filterd (phxpaimrmta02.imrmtpd1.prodappphxaev1.oraclevcn.com [127.0.0.1]) by phxpaimrmta02.imrmtpd1.prodappphxaev1.oraclevcn.com (8.18.1.2/8.18.1.2) with ESMTP id 60LG5fpF007822; Wed, 21 Jan 2026 16:50:59 GMT Received: from co1pr03cu002.outbound.protection.outlook.com (mail-westus2azon11010046.outbound.protection.outlook.com [52.101.46.46]) by phxpaimrmta02.imrmtpd1.prodappphxaev1.oraclevcn.com (PPS) with ESMTPS id 4br0vbhj7c-1 (version=TLSv1.2 cipher=ECDHE-RSA-AES256-GCM-SHA384 bits=256 verify=OK); Wed, 21 Jan 2026 16:50:58 +0000 ARC-Seal: i=1; a=rsa-sha256; s=arcselector10001; d=microsoft.com; cv=none; b=Fmtq93XkfYT0PU25obS19CsM6/qX0WQTO1bf7IQjNEGm+S5J1gSV08rg0XA/T1D3OFuFjqYi2q25dCyZiRgwd0yOfUvu9J+bg9M4Q6PF3yFNtnVrCbc9ztKZNiMC9m7it+3/gR07l/TVi+pAF6pquKOdAXDoxdm2wWv/qKcBnA4rAJ4UGy4mELTCyIfATvsWOqbgpQSGxxsW6mW9goaeBgLH00DgLc/IWmvqJNOIIKRHiZtvvJHjeYWtsDN/wyL15u0Z0PpiTQKld18PyN98+rNvnAZrbKkQB1eECCmBk0/dcew3kr7Y9C9zDeQO9/mPplHyb4F7wpm8EATlGOpuIg== 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=vy3h/3dMA1JkUw6OcY2FbjpfJW8L8hjcjTXe8NStvfw=; b=FCLpZXDx+Cktz98J3ZLGwUa/9f5qDfZERyTLATgCxRH5uFjftL0a8O09pVS2MBQowxzyYiS7vbIw+4cyj2EvmZMjwh9kEhxY1A+DDKx/AqExTB88Xz+gTnbjyXNmEPUUgWJmZVbOOE6TTGmVIkGh1jMfdT6P4quGs0r7i0ql6OQD+U3gkcac1JNcUdJoayonV01977MAnzKpIIWMLQJUY4wBDtFwScACEjXOl4/g+/oR36d7rxmDuKWdKquxWR7mUIl3A1ugs/pYcZ8yZAp0oxMPgzEmKj+PhCKgkEFgVEiPK8gv5L5P5CbLZ31k1kG01q8tFi/kpEuxlGrDT9rJDQ== 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=vy3h/3dMA1JkUw6OcY2FbjpfJW8L8hjcjTXe8NStvfw=; b=nLVVJRwrjZJsb2zmDDkQyq+yAnA9KPlE6OZjq1IUIHFY2Pg/btE1yvBGge89LvziX22OzGKfrDrydSACHLxWala/Y/3u8aEdijJ158Lt0H48t1O0oKzFeYU2Co9IB+7Bva7BiMm4UB9cneygkxoEHBcA7daTJz7uAP/BHmroWuY= Received: from PH0PR10MB5777.namprd10.prod.outlook.com (2603:10b6:510:128::16) by MN2PR10MB4255.namprd10.prod.outlook.com (2603:10b6:208:1d2::17) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id 15.20.9542.10; Wed, 21 Jan 2026 16:50:55 +0000 Received: from PH0PR10MB5777.namprd10.prod.outlook.com ([fe80::4b84:e58d:c708:c8ce]) by PH0PR10MB5777.namprd10.prod.outlook.com ([fe80::4b84:e58d:c708:c8ce%4]) with mapi id 15.20.9542.008; Wed, 21 Jan 2026 16:50:55 +0000 From: "Liam R. Howlett" To: Andrew Morton Cc: linux-mm@kvack.org, linux-kernel@vger.kernel.org, Suren Baghdasaryan , Lorenzo Stoakes , Pedro Falcato , David Hildenbrand , Vlastimil Babka , Michal Hocko , Jann Horn , shikemeng@huaweicloud.com, kasong@tencent.com, nphamcs@gmail.com, bhe@redhat.com, baohua@kernel.org, chrisl@kernel.org, Matthew Wilcox , "Liam R. Howlett" Subject: [PATCH v3 05/11] mm/memory: Add tree limit to free_pgtables() Date: Wed, 21 Jan 2026 11:49:40 -0500 Message-ID: <20260121164946.2093480-6-Liam.Howlett@oracle.com> X-Mailer: git-send-email 2.47.3 In-Reply-To: <20260121164946.2093480-1-Liam.Howlett@oracle.com> References: <20260121164946.2093480-1-Liam.Howlett@oracle.com> Content-Transfer-Encoding: quoted-printable X-ClientProxiedBy: YT4PR01CA0319.CANPRD01.PROD.OUTLOOK.COM (2603:10b6:b01:10a::22) To PH0PR10MB5777.namprd10.prod.outlook.com (2603:10b6:510:128::16) Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 X-MS-PublicTrafficType: Email X-MS-TrafficTypeDiagnostic: PH0PR10MB5777:EE_|MN2PR10MB4255:EE_ X-MS-Office365-Filtering-Correlation-Id: 9e926548-11a7-4247-a8fc-08de590d3e60 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?3H3j+OuOV8L8qZfwf/G8am2QGZW3VOrfsp3kdjdlUiBV4ICmfLpIlqGj/J60?= =?us-ascii?Q?84PHB7ELWuFOy9tLcjhiKWjdtNnR/idTUS4aVt+4CE+HIxnWSse+RgeTN1ly?= =?us-ascii?Q?ziCTY8tivnyHUPOeLoHkFg4Fikt+P0+fErq1solrgJ7qQc5URuVPOA9/vlX0?= =?us-ascii?Q?+BhprYpje+mm5yJhIeHNyWd3kS3/pdQiCKClz+gc3WNdShTPKLgt9wQk+fGE?= =?us-ascii?Q?x/Zzp5V0D5pgUqnJQLkVT/k6JnjMgXaq8AjUGDq7em6WhzkW2WuxjVlHGmc2?= =?us-ascii?Q?J1pfGuwFjVLI1z35jVvbDkmWHptXtoqo4dXxPOaataUUlHR1dFm5iFG+pT23?= =?us-ascii?Q?Am4xTgbChYRy8xxhbHnQ7sAXZn2aWn+Ol4BBKmyNL4Wes3FFMNQzcGZjNIJH?= =?us-ascii?Q?12uOEO1Rv2Der3IhtbBDPtZcXTwDJqbBv8jK4KOShfM03XLyivHwWupkU8Le?= =?us-ascii?Q?jD0XTzL4+uo4hmnZ59w7HvGfcvq0IiDTgVJLjEEuiT0wrv0Z37eo+WWeMjnt?= =?us-ascii?Q?xRl2fiZ+KkQiDu9b4uj5hq2Y+afmoqoAXACITW4aziVe/5F+UhurPHPq0f8n?= =?us-ascii?Q?CjMrn7ktboWU49AVAhqouDCKT9pMLFEjSVLTQYacd9TdLC/8A9esBporWL30?= =?us-ascii?Q?tv3w0qwZi52HYipmvBrtlGRJqF5MEacPvMhLHAl3GdOp4CZzk7l7ecNXiLn3?= =?us-ascii?Q?hCabVeEy4g65WOzMcmyHCEuHXoev3svXp+8o5OQb61ABsYwUud5cO8Lh21sN?= =?us-ascii?Q?ZpkedHCCqUdepugeJHFaTonXo7GCmjZi9eLkql4B6f+G0XXBPHlewQfV2ja4?= =?us-ascii?Q?WFqRs6DmQSg6Qz+usA2KmN+MihuFkUqHAYUWTV6JJmyLcRumnPXC4cPbJiuF?= =?us-ascii?Q?o+NDBSy3KTn2q8vB4JX4kgQ60kGE1S4XwzDFyCSLjrduOpuzlFyqOGtdJmeR?= =?us-ascii?Q?a/c7w+lauCDtiDF5HkQR8BIVqR96pRjU4VEC0H52r1uyTLynUnM6FyaUMMhm?= =?us-ascii?Q?QbDIyzOmiEMjLNn3yYTyOCtgcTTvihMUEFCGRoqXLmSwoDL5HGY7kptHnhOx?= =?us-ascii?Q?VsrpZ4Y8aY7zsuQMxXarD+nOkC/fomOlQDjbrG7ewWbACuKhwWGB8hYVxXZr?= =?us-ascii?Q?bTRJaohPFPH46aQfvOPela/YDVhpYaDFRkuGjOWJaxihKBkZ8TCo65kFOEfX?= =?us-ascii?Q?6AZpIbXIX70prlGi16QZUfm/K9GOA4/qyqZ3we/fgXUaZ125bOFcS39t9KmH?= =?us-ascii?Q?g1ttWu7lIXmsCDc5pqi2Jy7GdHfCTFXPAu+xOjvN9idfT7gBqCDtVm5MmLIc?= =?us-ascii?Q?vsTVX3Yp9Jv1UH5BxgnvS+dYC0HRU+6kGybINkivoZjmQW3ld62WjkJsFrB4?= =?us-ascii?Q?h54JEQjXducnb4Y8XxJu4SYNCVDT+N66cXPa35OWOQ/v0njzufRatuKAk7aL?= =?us-ascii?Q?5Bd/mPRte7lUPk2U2Xv/EV9HhEVIIcki380MQ/UcdA2Rb7asLoI/bG26YZem?= =?us-ascii?Q?IbJjTkCCG0pck5LXV+wSR72bqDPGLej62nEJ2XBc8vMXjAR7nfCLnkNyX9P7?= =?us-ascii?Q?H6m5odxmlWkXLpIjrBg=3D?= X-Forefront-Antispam-Report: CIP:255.255.255.255;CTRY:;LANG:en;SCL:1;SRV:;IPV:NLI;SFV:NSPM;H:PH0PR10MB5777.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?72gKkNUCQDwiEdFELJYHbfHuQfmspa5ya+KCCqja0NAL7ujybEpoueG6FGKv?= =?us-ascii?Q?0mSZ3+Nj6kY9D9cBNLhzjgszjfo6nUNm9B/EbKXRbq8O8qLChtoFkKcD4one?= =?us-ascii?Q?Ipbmwy2QkN/dy3GoZ3ayh8bm+Sqn404VCj6eNRQSYkbLMZhDcB/5UOJdXqlE?= =?us-ascii?Q?KN2eaPWrr/4E7azOauIwC5Fyr3/ammHvnmcXUonPEsN6EM7QigPlEtYzEdXY?= =?us-ascii?Q?gYdtFHswk4Qqh6eHbQH/3YmBi16OCVGDaQMbvZl82eokuSk3mieDM0phCmOW?= =?us-ascii?Q?iFNoDBa8FHp0x9jzbMBB7dxj28IGr0q0x7PV0ow+cqRqrILlkh681CgDuzAh?= =?us-ascii?Q?E/R5jEC1CcixJRKGzV3UsOmUcPh6saSWmOYIa4a5MPo3jO35f6i6oHJQ1q3E?= =?us-ascii?Q?UHEX4HZqLon93eYWXdJR89V/wuHz5OwTBhyYTroOGUSMVFHmrNX0jpzaW/hP?= =?us-ascii?Q?3wkz8qwiEVG1enGBgssFG+K5gvKVqEoFsHq7edcHwsk5GXC3/jHgAMC1DpOG?= =?us-ascii?Q?WtubPCGKOhG/UjCsOGSsYQv+PCsDU3r+8pURAa15EYODlcS+q+wT2vyMhxZc?= =?us-ascii?Q?tWyMBZZbWUXK8M06UnCM9SUinELJJ0OPKXbJ/oZ1xNJ50JwPr39QlVMspd+V?= =?us-ascii?Q?DurQlSBstDPayp+4a7QXryvsBNLdkwnG/iEtp3vm/G7rhmnuJf1YT6qQzfOO?= =?us-ascii?Q?SQH739kD6/q6KmtRgC2KAmFCBJIXe6gMbKiFtgbAFp0gvkSbntsyYGB7NaNp?= =?us-ascii?Q?irRiJggI+wJkG/CykryD9SIn/FXakOTigQ+yTwXhvAmg25pvBVIzsQbz4TGF?= =?us-ascii?Q?lC+2tqTwHZZbXn7fjaFG/qeZXp1oHf00ESQOE6ukcBq9OqBhDdyNCpuBNZMH?= =?us-ascii?Q?Q2ZHtgn1xeBymLpQoS+OyHhNNMlTVpkhocyPK3IrT6CnCllnM2gXiruwcOkg?= =?us-ascii?Q?FBP8QzZzQsiPoA/bWZgh8KCezU6YKRnK8yXu43Fjp3dN8mMiYXjxLrIrc+p3?= =?us-ascii?Q?wP5zPhuIKETE6D29mEqQRvDZmD418LAPsIMT3BNlouacPRuDtUwyj9+5oBqM?= =?us-ascii?Q?yQlSAr9xxr6+qF6dECr4IEyD1gpY+XZ71+YE+4ESDKqMHxVEHXdpZ5q4OpyN?= =?us-ascii?Q?WVyUMrlfrOA3ZEXAA8+TMYsceU97BFbqU4KchQyGsqqeylAtD/IF9FLzweM3?= =?us-ascii?Q?QkbWFNGc4Vh2k4I2WAOWwmNgtSxvwL0sDyTL/MFlRV5QOgNCmPalbHj2vOEX?= =?us-ascii?Q?dnC8XL88UrOxlUO5Jbnpl3wRf1Xh+sTKQRPH12kt4IxWCChvOPMWc4Z2mnPb?= =?us-ascii?Q?BRGBH0tA+1GM3tI5yg8SAP1jXJcdLzpotfWxhxpdXJ0gelIozsj7fR4dKUXP?= =?us-ascii?Q?SSHv154ZwMVcsRMWffp3mGf4xYVGNPHLT4WE0XDeI31IHoxz/HOtZ02NuwFX?= =?us-ascii?Q?mQqG8SNgiBPEtN5BLmFvKKMD9UTyHj2U2QGZNxFAKhzyB6/F7ED0uI9UzGHa?= =?us-ascii?Q?cfQWly8ck3nKPZkHSunkBPbA57Rsp11lYlffyUeu+1x6r4OFAc4xbnOvFDKV?= =?us-ascii?Q?XcFdm4sgAEyq1oVAILgiN8ei5az5B5XNsYD/g4t8fX+XVl3dkLvm2PZjzggl?= =?us-ascii?Q?NXMdnDar46isg1JBYhyZySIEtj3muoXNRl0mPvTlgw8rr55HfWciqnrheBZG?= =?us-ascii?Q?SGe8sWFSIGWCQiSn/ibae/Y7VPAgN/O4Gv/oBMFUp4CQFjzPcH4XtZATce5f?= =?us-ascii?Q?3WL+SUithg=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: 9e926548-11a7-4247-a8fc-08de590d3e60 X-MS-Exchange-CrossTenant-AuthSource: PH0PR10MB5777.namprd10.prod.outlook.com X-MS-Exchange-CrossTenant-AuthAs: Internal X-MS-Exchange-CrossTenant-OriginalArrivalTime: 21 Jan 2026 16:50:54.9959 (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: XZSU4y5Lc9U06CkzX0zTlbAE2rt/XHnGTpDuFbDoHlAeOQjnBf9su2ai9hcG5V3haMAZlJqhC65L66Ear4Vgpw== X-MS-Exchange-Transport-CrossTenantHeadersStamped: MN2PR10MB4255 X-Proofpoint-Virus-Version: vendor=baseguard engine=ICAP:2.0.293,Aquarius:18.0.1121,Hydra:6.1.20,FMLib:17.12.100.49 definitions=2026-01-21_02,2026-01-20_01,2025-10-01_01 X-Proofpoint-Spam-Details: rule=notspam policy=default score=0 mlxlogscore=999 mlxscore=0 spamscore=0 malwarescore=0 bulkscore=0 adultscore=0 phishscore=0 suspectscore=0 classifier=spam adjust=0 reason=mlx scancount=1 engine=8.12.0-2601150000 definitions=main-2601210142 X-Authority-Analysis: v=2.4 cv=WbcBqkhX c=1 sm=1 tr=0 ts=697103f3 cx=c_pps a=OOZaFjgC48PWsiFpTAqLcw==:117 a=OOZaFjgC48PWsiFpTAqLcw==:17 a=6eWqkTHjU83fiwn7nKZWdM+Sl24=:19 a=z/mQ4Ysz8XfWz/Q5cLBRGdckG28=:19 a=lCpzRmAYbLLaTzLvsPZ7Mbvzbb8=:19 a=xqWC_Br6kY4A:10 a=vUbySO9Y5rIA:10 a=GoEa3M9JfhUA:10 a=VkNPw1HP01LnGYTKEx00:22 a=yPCof4ZbAAAA:8 a=jQEhaW4UhibMOa9XUgMA:9 X-Proofpoint-Spam-Details-Enc: AW1haW4tMjYwMTIxMDE0MiBTYWx0ZWRfX4WXRtadflHFL AyOdVlb875Ra5hwSm+8y8s1Im7Mdqg4YquCMrBsnry0pQPtenMbFF+5/kllHuMEx1CoNV9eUKyL 1YiM6mIHM5rzL4JTqTd7lBXMs5k+fHnVuzigFgmPDCPPrZocOd0fRymWGS9SVc57D514O4O3kQ7 EjZVDz5WhfndJ3dOqg7Z2jshg/jgiT0IPE7dl/AdQBQNhNo65GVWQDraCp3AZ7AP5qxke8BCAzm KwKkIjHBYCw0cVwnk+WK1P34rd7bWhtD0PRClwnGYRJ0l27MTrvfALpJ30mKsqh+/AcCivJt2/p VM3P5398tnfrmyMp9v91sA97GwTl4zquivsvN4+FsDjl0gC30d7aabUhw0g/4angbhdwhN0d5lk THe098MAqmBnkNUtZ4qQnbU4zW2CDG2X4BXTu+slKG5aQYHZCq8nVwYpuVi/va5Luc3bQ4d74R0 6Z3sMdvMH8Ob/hRkNVg== X-Proofpoint-ORIG-GUID: li-1dbrwQ7NkKOOhUQ-lo5aMfhNDguNK X-Proofpoint-GUID: li-1dbrwQ7NkKOOhUQ-lo5aMfhNDguNK Content-Type: text/plain; charset="utf-8" The ceiling and tree search limit need to be different arguments for the future change in the failed fork attempt. The ceiling and floor variables are not very descriptive, so change them to pg_start/pg_end. Adding a new variable for the vma_end to the function as it will differ from the pg_end in the later patches in the series. Add a kernel doc about the free_pgtables() function. Test code also updated. No functional changes intended. Reviewed-by: Lorenzo Stoakes Reviewed-by: Pedro Falcato Signed-off-by: Liam R. Howlett --- mm/internal.h | 6 +++-- mm/memory.c | 42 +++++++++++++++++++++++++------- mm/mmap.c | 2 +- mm/vma.c | 3 ++- tools/testing/vma/vma_internal.h | 3 ++- 5 files changed, 42 insertions(+), 14 deletions(-) diff --git a/mm/internal.h b/mm/internal.h index 5afe55751fe08..2cdc5c9396f10 100644 --- a/mm/internal.h +++ b/mm/internal.h @@ -510,8 +510,10 @@ void deactivate_file_folio(struct folio *folio); void folio_activate(struct folio *folio); =20 void free_pgtables(struct mmu_gather *tlb, struct ma_state *mas, - struct vm_area_struct *start_vma, unsigned long floor, - unsigned long ceiling, bool mm_wr_locked); + struct vm_area_struct *vma, unsigned long pg_start, + unsigned long pg_end, unsigned long vma_end, + bool mm_wr_locked); + void pmd_install(struct mm_struct *mm, pmd_t *pmd, pgtable_t *pte); =20 struct zap_details; diff --git a/mm/memory.c b/mm/memory.c index 4b0790c8fa48e..9043cfda65b94 100644 --- a/mm/memory.c +++ b/mm/memory.c @@ -370,23 +370,47 @@ void free_pgd_range(struct mmu_gather *tlb, } while (pgd++, addr =3D next, addr !=3D end); } =20 +/** + * free_pgtables() - Free a range of page tables + * @tlb: The mmu gather + * @mas: The maple state + * @vma: The first vma + * @pg_start: The lowest page table address (floor) + * @pg_end: The highest page table address (ceiling) + * @vma_end: The highest vma tree search address + * @mm_wr_locked: boolean indicating if the mm is write locked + * + * Note: pg_start and pg_end are provided to indicate the absolute range o= f the + * page tables that should be removed. This can differ from the vma mappi= ngs on + * some archs that may have mappings that need to be removed outside the v= mas. + * Note that the prev->vm_end and next->vm_start are often used. + * + * The vma_end differs from the pg_end when a dup_mmap() failed and the tr= ee has + * unrelated data to the mm_struct being torn down. + */ void free_pgtables(struct mmu_gather *tlb, struct ma_state *mas, - struct vm_area_struct *vma, unsigned long floor, - unsigned long ceiling, bool mm_wr_locked) + struct vm_area_struct *vma, unsigned long pg_start, + unsigned long pg_end, unsigned long vma_end, + bool mm_wr_locked) { struct unlink_vma_file_batch vb; =20 + /* + * Note: USER_PGTABLES_CEILING may be passed as the value of pg_end and + * may be 0. Underflow is expected in this case. Otherwise the + * pagetable end is exclusive. + * vma_end is exclusive. + * The last vma address should never be larger than the pagetable end. + */ + WARN_ON_ONCE(vma_end - 1 > pg_end - 1); + tlb_free_vmas(tlb); =20 do { unsigned long addr =3D vma->vm_start; struct vm_area_struct *next; =20 - /* - * Note: USER_PGTABLES_CEILING may be passed as ceiling and may - * be 0. This will underflow and is okay. - */ - next =3D mas_find(mas, ceiling - 1); + next =3D mas_find(mas, vma_end - 1); if (unlikely(xa_is_zero(next))) next =3D NULL; =20 @@ -406,7 +430,7 @@ void free_pgtables(struct mmu_gather *tlb, struct ma_st= ate *mas, */ while (next && next->vm_start <=3D vma->vm_end + PMD_SIZE) { vma =3D next; - next =3D mas_find(mas, ceiling - 1); + next =3D mas_find(mas, vma_end - 1); if (unlikely(xa_is_zero(next))) next =3D NULL; if (mm_wr_locked) @@ -417,7 +441,7 @@ void free_pgtables(struct mmu_gather *tlb, struct ma_st= ate *mas, unlink_file_vma_batch_final(&vb); =20 free_pgd_range(tlb, addr, vma->vm_end, - floor, next ? next->vm_start : ceiling); + pg_start, next ? next->vm_start : pg_end); vma =3D next; } while (vma); } diff --git a/mm/mmap.c b/mm/mmap.c index 9c8adc505d3de..827a64cdcc681 100644 --- a/mm/mmap.c +++ b/mm/mmap.c @@ -1308,7 +1308,7 @@ void exit_mmap(struct mm_struct *mm) mt_clear_in_rcu(&mm->mm_mt); vma_iter_set(&vmi, vma->vm_end); free_pgtables(&tlb, &vmi.mas, vma, FIRST_USER_ADDRESS, - USER_PGTABLES_CEILING, true); + USER_PGTABLES_CEILING, USER_PGTABLES_CEILING, true); tlb_finish_mmu(&tlb); =20 /* diff --git a/mm/vma.c b/mm/vma.c index 0c35cdc0d3b7b..b2b9e7b3284f3 100644 --- a/mm/vma.c +++ b/mm/vma.c @@ -484,6 +484,7 @@ void unmap_region(struct ma_state *mas, struct vm_area_= struct *vma, unmap_vmas(&tlb, mas, vma, vma_start, vma_end, vma_end); mas_set(mas, vma->vm_end); free_pgtables(&tlb, mas, vma, prev ? prev->vm_end : FIRST_USER_ADDRESS, + next ? next->vm_start : USER_PGTABLES_CEILING, next ? next->vm_start : USER_PGTABLES_CEILING, /* mm_wr_locked =3D */ true); tlb_finish_mmu(&tlb); @@ -1275,7 +1276,7 @@ static inline void vms_clear_ptes(struct vma_munmap_s= truct *vms, mas_set(mas_detach, 1); /* start and end may be different if there is no prev or next vma. */ free_pgtables(&tlb, mas_detach, vms->vma, vms->unmap_start, - vms->unmap_end, mm_wr_locked); + vms->unmap_end, vms->unmap_end, mm_wr_locked); tlb_finish_mmu(&tlb); vms->clear_ptes =3D false; } diff --git a/tools/testing/vma/vma_internal.h b/tools/testing/vma/vma_inter= nal.h index 7fa56dcc53a6b..f50b8ddee6120 100644 --- a/tools/testing/vma/vma_internal.h +++ b/tools/testing/vma/vma_internal.h @@ -1139,7 +1139,8 @@ static inline void unmap_vmas(struct mmu_gather *tlb,= struct ma_state *mas, =20 static inline void free_pgtables(struct mmu_gather *tlb, struct ma_state *= mas, struct vm_area_struct *vma, unsigned long floor, - unsigned long ceiling, bool mm_wr_locked) + unsigned long ceiling, unsigned long tree_max, + bool mm_wr_locked) { } =20 --=20 2.47.3