From nobody Mon Feb 9 20:31:50 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 BF70A34B413 for ; Fri, 14 Nov 2025 17:53:51 +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=1763142839; cv=fail; b=EogrQcInTplz1d56rI15+UBvXIHru0pfc9SOfHzRjEimi1iYB7X93cjQKJ6iqNzD+5QQStoR/7HTR1g0K40WL+3hLDGEDhDmp5unk9EsPtt/a/2rvdK5klsX2gbwZjAwVonf3KAcPSglPMtWKErXHpMISr75Br0f7x8ZdKRj0Ok= ARC-Message-Signature: i=2; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1763142839; c=relaxed/simple; bh=g0WOYeHbl3JQ7rhobkQvwVKD6D7WPN89mheorHIGrDM=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: Content-Type:MIME-Version; b=LreYgoiR95bXP3bCXaYyadQC9GOI3rct7Prf4otPKptMHAGH03hQf4qDFEeR/laUMQLKHVC+5YghspE+pR444BKpJLnPTS5Aj04De/pwDET3xaYS4GRYdDZoDgH4vaMTNap/PVjx2LXafRdonr1ZvDS09eiqlG7FYGsGH5FeVQM= 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=UaJuxD5k; dkim=pass (1024-bit key) header.d=oracle.onmicrosoft.com header.i=@oracle.onmicrosoft.com header.b=C7uPhGB5; 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="UaJuxD5k"; dkim=pass (1024-bit key) header.d=oracle.onmicrosoft.com header.i=@oracle.onmicrosoft.com header.b="C7uPhGB5" Received: from pps.filterd (m0333521.ppops.net [127.0.0.1]) by mx0b-00069f02.pphosted.com (8.18.1.2/8.18.1.2) with ESMTP id 5AEGuH39017649; Fri, 14 Nov 2025 17:53:35 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=NrWdGOIrshezQTxDd3WyrJPk3onlEWepiFpUHZn6BSw=; b= UaJuxD5krQ2IfGbMsbTQmw/BVgPsQhUKBk2Lajr7uPSgMGJwVnLIp2P9YFaBfDCF zYPQuGGviTtwbp4E3z+NLHdj/WLLLi0WNlgRqZV8SPZPPCgdz8ta1gVpDl7LvqHC 6V054w36B9N0d+CEdjq6o93ebQ+sAsG5QH05d0vpUeXDVISh4Bp3lS9Wpq5bf8u3 OFivZDhFwahSISQlz08wg4yBjm0ThGFPPI++dpubQCCE2XkbMW1S9/v0BkPLtI18 iWInw+GCKtZuTMTHwTFuYZB3XExhpdClqTTXhTcYDnRlhuCTTuwr70IwuSibC5EN C3UkBwQRv7HntspxPlXkOg== Received: from phxpaimrmta03.imrmtpd1.prodappphxaev1.oraclevcn.com (phxpaimrmta03.appoci.oracle.com [138.1.37.129]) by mx0b-00069f02.pphosted.com (PPS) with ESMTPS id 4adr8s9p46-1 (version=TLSv1.2 cipher=ECDHE-RSA-AES256-GCM-SHA384 bits=256 verify=OK); Fri, 14 Nov 2025 17:53:35 +0000 (GMT) Received: from pps.filterd (phxpaimrmta03.imrmtpd1.prodappphxaev1.oraclevcn.com [127.0.0.1]) by phxpaimrmta03.imrmtpd1.prodappphxaev1.oraclevcn.com (8.18.1.2/8.18.1.2) with ESMTP id 5AEGhAmY022020; Fri, 14 Nov 2025 17:53:34 GMT Received: from dm1pr04cu001.outbound.protection.outlook.com (mail-centralusazon11010040.outbound.protection.outlook.com [52.101.61.40]) by phxpaimrmta03.imrmtpd1.prodappphxaev1.oraclevcn.com (PPS) with ESMTPS id 4a9vadu0x2-1 (version=TLSv1.2 cipher=ECDHE-RSA-AES256-GCM-SHA384 bits=256 verify=OK); Fri, 14 Nov 2025 17:53:34 +0000 ARC-Seal: i=1; a=rsa-sha256; s=arcselector10001; d=microsoft.com; cv=none; b=XgIoVBNgWdP3BRcK7CJbgKk7f32IGRfUud8Iy3Qr+FUfjugM6flpTauLOvFi6odamhPxHKMSbhmCIROVr7rnWmUjZHsbwS8C1rjhLA48mgEgpgCcTN4ClpXw5zknd76KghZtk5r4scpucR0i9M+adMKa/oRujwYAioiTcncniNNc8LXQHQb1ZN9lwqm5MYCao8mbBOnwtm32y1F3X8UiJD9B4UYuldl6RXZbS96P2Agg4QAoRabT8gcLdQI3rbormqX1pLX1R5eKy8IDAhYwlRpMQE3OgCe53l+iTaegWG8xpEIAXVCHiJQpjbYDNXkwnNOiMYO89pOG5GhiKXyV8A== 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=NrWdGOIrshezQTxDd3WyrJPk3onlEWepiFpUHZn6BSw=; b=Rp7OlxhpnCP60va/qMCUnai4kBGtiqVV7nVTY+Boj9iY9m0xRQf4rGCVR9tpsBpZk5p+N377QBznHTWhzzzzkmPlVtLTSlOiN30barXs0fQUwl0z2gujxZ+yFKeAalDNHgMt2wJLTkRiOs78Hi+9KExztq1EeyyTcjz+esuYa0T8po9qnLfwlsZFDnz77VhgkNZSlf0i6m5q9TfS2CfZcHhzXclT8kzj3HatlgtsJrI9XoO90PKT7e8BuWdKy+wG7BhK44XQGNuMwjwDzv8mA4d5xiKRtOO/lT57N/HQdnk6gtJTycaTdsc1g0P+vJI6nPBrGeihTbw+eww7ng+yjA== 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=NrWdGOIrshezQTxDd3WyrJPk3onlEWepiFpUHZn6BSw=; b=C7uPhGB5R6xld+8Dzpq4+XvyTr6HIInsp3mIgqzLXBoZmtknPd2C5QGXwGKoS9Fws8/BKPJtId40xRQPCqI3iT/Ge/qoqkqYR5BSAR4Nj8SZiIxPPRnCbQTZ5ooEYabNvYZlqGTK+vSvQPvY2H+T+glg/NcX+/i5TkQ4JiplYuA= Received: from DM4PR10MB8218.namprd10.prod.outlook.com (2603:10b6:8:1cc::16) by CH3PR10MB7164.namprd10.prod.outlook.com (2603:10b6:610:123::8) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id 15.20.9320.16; Fri, 14 Nov 2025 17:53:29 +0000 Received: from DM4PR10MB8218.namprd10.prod.outlook.com ([fe80::2650:55cf:2816:5f2]) by DM4PR10MB8218.namprd10.prod.outlook.com ([fe80::2650:55cf:2816:5f2%7]) with mapi id 15.20.9320.013; Fri, 14 Nov 2025 17:53:29 +0000 From: Lorenzo Stoakes To: Andrew Morton Cc: David Hildenbrand , "Liam R . Howlett" , Vlastimil Babka , Mike Rapoport , Suren Baghdasaryan , Michal Hocko , Jann Horn , Pedro Falcato , linux-mm@kvack.org, linux-kernel@vger.kernel.org Subject: [PATCH 2/2] testing/selftests/mm: add soft-dirty merge self-test Date: Fri, 14 Nov 2025 17:53:19 +0000 Message-ID: <0db6aeb73d42876756ba73163cc0cc6e7e8c6100.1763142412.git.lorenzo.stoakes@oracle.com> X-Mailer: git-send-email 2.51.0 In-Reply-To: References: Content-Transfer-Encoding: quoted-printable X-ClientProxiedBy: LO4P123CA0387.GBRP123.PROD.OUTLOOK.COM (2603:10a6:600:18f::14) To DM4PR10MB8218.namprd10.prod.outlook.com (2603:10b6:8:1cc::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: DM4PR10MB8218:EE_|CH3PR10MB7164:EE_ X-MS-Office365-Filtering-Correlation-Id: ac0b4fac-7693-462e-7865-08de23a6b7e1 X-MS-Exchange-SenderADCheck: 1 X-MS-Exchange-AntiSpam-Relay: 0 X-Microsoft-Antispam: BCL:0;ARA:13230040|366016|7416014|376014|1800799024; X-Microsoft-Antispam-Message-Info: =?us-ascii?Q?dKAc5/QmWB6SJE0P71J9afnA6mS5geyotthRQKGNns2f7dC0pI28GOTdptL4?= =?us-ascii?Q?6bQBG7Pqrezscx3C78yCXlHP1QXrETtSHVWe4kr5dwU9DBmnYRyeLIoGj1Gy?= =?us-ascii?Q?6InhEYancjn4ufXLw9dPxqSa3XX62u4oWLBB8/R/WGM4RqIF57izaOh1f/Yv?= =?us-ascii?Q?7NufBw0NFjgdQeRJCiG8WHlCAYjsVnvxX8WCl+qIRFTJ4WlZFeOi3eK/5Y5J?= =?us-ascii?Q?XAkcYlwHNWXrBdToU6o2TMql33mKeSzpGMozKBfVxcLhelNeTyjAKHKFZUSx?= =?us-ascii?Q?mwbDGh6g8ziGbK80vdtJXdtnpdp9IVxvlm5ExGzpQF6DNk5ImaA+z+smBTEB?= =?us-ascii?Q?8xbNgWelWg4z+5xV13hXcQ9QFBqngz3sY33l5Qb2/u1OuOl4c+LL7xQnZCJE?= =?us-ascii?Q?0SucUQ4q/5y84PlXIEfMPFH3EksH18P1bLpJ4e9nBGB2bm2/ah2ihMkRTOra?= =?us-ascii?Q?VS9PZCO/adU3BqkYdwrmNH6nARVyBQtX6Svgo7ZvgYfQ2NaCIzZ9hYrlocbQ?= =?us-ascii?Q?UMFUYtuIIxivQY51Lcy7qV9KpzEjp36DQP6sxGHQTEf/zvIVF4iMNywVLPgf?= =?us-ascii?Q?hj8o6pswmJLb3s0uQVQYhkPNt+yVGG/2ZInjNAXYGP5KeaFLs2lRRXWUHq7w?= =?us-ascii?Q?7o0QwXoqJUPLn4odQHDBR+h5WLgr3ypt1ydZgGV4CySBgVsxtmgJR9+zhUq7?= =?us-ascii?Q?FAeBmuAnQ3CkbynHfpv3mFbHZ8JEwBDGf7nMXF3RzUzrkkw2GdiayhG7pZ9S?= =?us-ascii?Q?ahogmph7wnO+0WAHRRwRYLdb/P5rzwqpR/SY7nONYYSPa18NjXs/0BLzD2xv?= =?us-ascii?Q?VNwgmIhWiWoA6JJ+ZzXrSQCJ7180cb62+hxqBc4GDuS84nr8RdUSQGtlzsrw?= =?us-ascii?Q?kv1GEtaZ+/F5jKtDTnS0ac9zRaw0FxOF6FwZSxvToCqds4rHNrJy+dD0Zc27?= =?us-ascii?Q?lv4Y2O95qY3P8C5vkn29fx/GYQJeIZxE15KOaUEFfsT4zhuLW0Mmll0bbZY/?= =?us-ascii?Q?tlTggV7ZKprK0+H9GrTT+5PmK0EbARCaELCcmQZtSHARcbxwLCYz5FN+2hor?= =?us-ascii?Q?MhVakqxno/+GVX77dixVlEP23WQlX6H4wHl/ILQJjhOwdHCEBvYbohuVsoGQ?= =?us-ascii?Q?4Girksbl7qyRncHu5zks7V0I3B+x6M6VWjJUiYGfguYesZ9GTt46MljMRghC?= =?us-ascii?Q?8+cS7F83Ibc6UglArePv2lsEtt38KIhMYBVXeuHMHwggqxqSh5nK7hUK6i/p?= =?us-ascii?Q?u1M7NIWPJzngXR2BpVvpmXDs7b+JI7yUALLcJ3AgHDF/TgFKJKhEinP5zWmH?= =?us-ascii?Q?7ciXFn6Rfe05Jr9HqCX15WsM4XhY2lLj78SeCRxg1VmOOZWRcjENz71UzCOU?= =?us-ascii?Q?ScqwcYhZHcTn+SG/SUepmSrd0MDVutTZKAMlRDICUwKXdfLeG8/0XTesbwrk?= =?us-ascii?Q?c4/GiFt9KJPYicxTyOLnmthWXrfq6W9V?= 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)(7416014)(376014)(1800799024);DIR:OUT;SFP:1101; X-MS-Exchange-AntiSpam-MessageData-ChunkCount: 1 X-MS-Exchange-AntiSpam-MessageData-0: =?us-ascii?Q?nSdBz8aQJYkuqo9okyemYOtYNa+xaHA2odx174nOyAB3D0zqeizSmroyhp6N?= =?us-ascii?Q?WKmh736RVC4+2QXIe5yh3T9NBRSLS2ZEEzKi/rOx6g28VkdYIUx4snN3o1e3?= =?us-ascii?Q?jlX3r4Z3G53H9N3sMxwKt+XfLJd09o46RWw95XxGJff6SsAKjoPR6VMymJnb?= =?us-ascii?Q?pDNJBLz9vgDk9a9vWSglNTcf3bLH6XbIFqB8jdCU7/GmFX4ryg8sQ9fU4cVI?= =?us-ascii?Q?KTIztgjluPrbQCNLKUZo/imE9v/nQZhnEvTF6MgJhqmmg71kBAP6t0zPH5If?= =?us-ascii?Q?Ie6r3Fjt5Kjo2zXOP9rzDefXM3wT5iWNmtH7i6JNUY6ghYkyzC9NNCQPCm/x?= =?us-ascii?Q?+7TkLGU9rtO4R9zNeys53LrOGVrvOhjKwbBBYk0k8M5yZkWr4P/0Dj9vSEL9?= =?us-ascii?Q?+OWP+0YLlXZBvXFnRHCZLPOGlrFyshUfktKpVOsiT3QNCfthj9I+6K0OEaQP?= =?us-ascii?Q?z1YyuBGTU4BRnug/pncxrmvhH9E0TKK/3QtaES7ALHJbt3Pq6s4g+i3NDT8w?= =?us-ascii?Q?JvgChpU0qZFr0FnKIZCpAwtenfk+CxAO+3zuU+zKpGDp+O3Ce3CQNedyZ6U+?= =?us-ascii?Q?j4oC/C1QicOuc8rlH0ZhQ24li22HtbvqUq3vMvuXHLdzbphQvQ6CI8G1k/YV?= =?us-ascii?Q?Y58dTmpfTTWz/D0nppGl/cBh6Ogn74UbdcpwHYEzrfBeuFX8cEp9xVmVoTQ7?= =?us-ascii?Q?BwuNroXSUzihnrCRjCYkhqNu1PeYIczlTsJSfAmzm/vmAy4cKFLtW8wo/DpS?= =?us-ascii?Q?PWf4b0GQ+Db0k1J9PtcfnO1xnehGsrwkq/LoFUbD3qvuhgujZxUc4YaClTLF?= =?us-ascii?Q?++Yz/CP0P+hkOqMWeZDPzvnRoxpm9f0ixMVVtVqOya5jouTf4b7j1YsydODL?= =?us-ascii?Q?peCsK84labFpDocPEGbYFy5JWrGGQMhpBdeMOFmmyd7jE4KkQjifCXBeqNi5?= =?us-ascii?Q?pjk7nUaBmbLJdkAkyJiZRnOsYTYDKEvV5dfdnhKN+ptTdTqPAnGJxoAWOCNQ?= =?us-ascii?Q?kUw5DCVAblAQWBV8liehTCZQcNVGdsj1S2uxH9TV7TD1feVuRp5AIBsS2Jo/?= =?us-ascii?Q?YA9a4wv7MbQzfi1kuZ4E0aaUTD+3OZNZcJ61/o8N2iOCK4lNpfc0CudBpFXe?= =?us-ascii?Q?pWnhBkCIf0E0lfHMLiVKc+XO0x9Go5ugP5dqtn6xyIOFRKMpp6CPVQ5Ry4FV?= =?us-ascii?Q?RE7yV/LbgGgPhJqyzFX6HfMThr7xklHD+x/BRg58sgpGP7knoh2DJM3hbpNV?= =?us-ascii?Q?JcyhR9edf2NnsP+Ua9MQYyeYE7tmVv9Cx43fwFtsYjZD5hM3FYbe7/1S6bkD?= =?us-ascii?Q?lsIMXh3BJ5hw3Wucb2dS1GdcHWR1tDHCgrnZJzdiMXj/4POguq3vQeDJvLsP?= =?us-ascii?Q?2ZsrytAPZI/L3kn2gaKdvYPk2WxDTWsL05icp5B6Iu90TsFQ0UOPx6bPduxL?= =?us-ascii?Q?Mdz9oNR/DQyqv3utFZ4lxzETjnzQCzDs5gGIdvKETAMc/aMtx/M3x5/pRt+M?= =?us-ascii?Q?BWLPKkF6k906fPr+ZHOU0/OOyw81S3/l3CuI6dsNsfw2BHZuO5ePRhM98XNt?= =?us-ascii?Q?JLklEcn0OyeYXHxq20tPiqni5PqdZytyPuimjNAHawoYB+1hLv945Q+1bFXp?= =?us-ascii?Q?Xg=3D=3D?= X-MS-Exchange-AntiSpam-ExternalHop-MessageData-ChunkCount: 1 X-MS-Exchange-AntiSpam-ExternalHop-MessageData-0: tCnCNM0DT1mhT6vtXaRpc9oxu0rp2KXNBrQBPFTZmcDJdzyIYniWDXpjILLJA+KklbIxyAVG5lVCE+GWy9woymZ67GczBTs6hisG5nOipAR5NeZnrzTMEvin9CyAasnsLTguO/ldsrlXWaqSY2HrbiLjHkgvAmMH/6/4ig5QAOnEg/5UHGMV5FsRpGaq1BpzP+AUmhwNtJqRNL7Li0rvPSY3Je1GvQRPLYan63c/fWVZTnS0vUtIN4I1r8IfJLJKggIr7TpVa85inAOWpSoQUK5+WVvasBhnASvRrhWaTW5rNYUllsjjiRbmyY8iDomq6nJ5W6Z/Ci5+b6CIxVponR3mK8EdgOW6VL9E+BOSx0jm96fvfNAn+kyaYRw6JbcfqFuXN/0+5FoxkVirGcRBiOvWUxTJgDs2/P9xHf9BV60DYsuJDa1JL1BpvAvyjBkHoYETOqcL1gfdkHVodrUo3dP/oYsBioH6qCC7jRZWdyS7I/u81wtkJlmOgLjYizjq7gNL9P3C67hRhCin0HdsF4bH0GPCt+RAfN7ifVI78JUL6HHskb4WUPATtlc8/9oXPS5auxECDTo3rZ/9tzNgIkI1ZtIuDi3t8AlsA2V21kI= X-OriginatorOrg: oracle.com X-MS-Exchange-CrossTenant-Network-Message-Id: ac0b4fac-7693-462e-7865-08de23a6b7e1 X-MS-Exchange-CrossTenant-AuthSource: DM4PR10MB8218.namprd10.prod.outlook.com X-MS-Exchange-CrossTenant-AuthAs: Internal X-MS-Exchange-CrossTenant-OriginalArrivalTime: 14 Nov 2025 17:53:29.0367 (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: KkXVka/s8w+xFslivZ1k8YjnGprLeGqGf0/D2QUyYSdUHqQwMeiFqu7N5bkKdhlzWD5PYVcbjJ4CL8CV7NBvfehjJrhrBgWwteD6Ms1jH6o= X-MS-Exchange-Transport-CrossTenantHeadersStamped: CH3PR10MB7164 X-Proofpoint-Virus-Version: vendor=baseguard engine=ICAP:2.0.293,Aquarius:18.0.1121,Hydra:6.1.9,FMLib:17.12.100.49 definitions=2025-11-14_05,2025-11-13_02,2025-10-01_01 X-Proofpoint-Spam-Details: rule=notspam policy=default score=0 adultscore=0 mlxscore=0 phishscore=0 mlxlogscore=965 spamscore=0 suspectscore=0 bulkscore=0 malwarescore=0 classifier=spam adjust=0 reason=mlx scancount=1 engine=8.12.0-2510240000 definitions=main-2511140144 X-Authority-Analysis: v=2.4 cv=VqQuwu2n c=1 sm=1 tr=0 ts=69176c9f b=1 cx=c_pps a=WeWmnZmh0fydH62SvGsd2A==:117 a=WeWmnZmh0fydH62SvGsd2A==:17 a=6eWqkTHjU83fiwn7nKZWdM+Sl24=:19 a=z/mQ4Ysz8XfWz/Q5cLBRGdckG28=:19 a=lCpzRmAYbLLaTzLvsPZ7Mbvzbb8=:19 a=xqWC_Br6kY4A:10 a=6UeiqGixMTsA:10 a=GoEa3M9JfhUA:10 a=VkNPw1HP01LnGYTKEx00:22 a=yPCof4ZbAAAA:8 a=-rSKcG2lC8jYhIwHPvgA:9 X-Proofpoint-ORIG-GUID: 1k-SB-o1-xALc8EnZOUmmjGZaFRosST8 X-Proofpoint-Spam-Details-Enc: AW1haW4tMjUxMTEzMDE3OCBTYWx0ZWRfXwGL8sr8nSDcH Dmr7ZVwpv7lsIbzRQ+yzvEXcuKd3kb9yX9yPy90p7iZ9CmHsAk4YrlnVQbgbyAhSgdHwTQfRzet Qy/OXGBsX9ufqVhQpRaG9kKMYkMNGcqnYja2XLWaBp8BACnV21pRcOXcZusplre2wncBwpJQjz1 57kC31hVu/XcXcbWYm9XJbCysNWl6jTCZnA6AdkY6p5JNK+6SjdaELoAAMa7oyhBAaIqi6m0Hwb ZA59iwvSHpQXUrP4H4psIXjjRuZ8YwjAvXMVPA66Dr+l1TToZbumqVnh7VeTWK+D87YqwU+MBvl NgWY2nr654GRwBqmUhwLZJ/KE7U63Q9/f48xtvPfpeeryMbh60MQko/GKXRzsrZVimDD2du4LmA BHGpniNScbNkMHveKrE0hsth4w7NCg== X-Proofpoint-GUID: 1k-SB-o1-xALc8EnZOUmmjGZaFRosST8 Content-Type: text/plain; charset="utf-8" Assert that we correctly merge VMAs containing VM_SOFTDIRTY flags now that we correctly handle these as sticky. In order to do so, we have to account for the fact the pagemap interface checks soft dirty PTEs and additionally that newly merged VMAs are marked VM_SOFTDIRTY. To account for this we use unfaulted anon VMAs, mapping one VMA in and clearing soft-dirty, then another separate from the first which will be marked soft-dirty which we then mremap() into place. Signed-off-by: Lorenzo Stoakes --- tools/testing/selftests/mm/soft-dirty.c | 51 ++++++++++++++++++++++++- 1 file changed, 50 insertions(+), 1 deletion(-) diff --git a/tools/testing/selftests/mm/soft-dirty.c b/tools/testing/selfte= sts/mm/soft-dirty.c index 4ee4db3750c1..bb29edb1e2a3 100644 --- a/tools/testing/selftests/mm/soft-dirty.c +++ b/tools/testing/selftests/mm/soft-dirty.c @@ -184,6 +184,54 @@ static void test_mprotect(int pagemap_fd, int pagesize= , bool anon) close(test_fd); } =20 +static void test_merge(int pagemap_fd, int pagesize) +{ + char *reserved, *map, *map2; + + /* Reserve space. */ + reserved =3D mmap(NULL, 4 * pagesize, PROT_NONE, + MAP_ANON | MAP_PRIVATE, -1, 0); + if (reserved =3D=3D MAP_FAILED) + ksft_exit_fail_msg("mmap failed\n"); + munmap(reserved, 4 * pagesize); + + /* Map a page. */ + map =3D mmap(&reserved[pagesize], pagesize, PROT_READ | PROT_WRITE, + MAP_ANON | MAP_PRIVATE | MAP_FIXED, -1, 0); + if (map =3D=3D MAP_FAILED) + ksft_exit_fail_msg("mmap failed\n"); + + /* This will clear VM_SOFTDIRTY too. */ + clear_softdirty(); + + /* + * Now place a new mapping which will be marked VM_SOFTDIRTY. Away from + * map. + */ + map2 =3D mmap(&reserved[3 * pagesize], pagesize, PROT_READ | PROT_WRITE, + MAP_ANON | MAP_PRIVATE | MAP_FIXED, -1, 0); + if (map2 =3D=3D MAP_FAILED) + ksft_exit_fail_msg("mmap failed\n"); + + /* + * Now remap it immediately adjacent to map, if the merge correctly + * propagates VM_SOFTDIRTY, we should then observe the VMA as a whole + * being marked soft-dirty. + */ + map2 =3D mremap(map2, pagesize, pagesize, MREMAP_FIXED | MREMAP_MAYMOVE, + &reserved[2 * pagesize]); + if (map2 =3D=3D MAP_FAILED) + ksft_exit_fail_msg("mremap failed\n"); + ksft_test_result(pagemap_is_softdirty(pagemap_fd, map) =3D=3D 1, + "Test %s-anon soft-dirty after merge 1st pg\n", + __func__); + ksft_test_result(pagemap_is_softdirty(pagemap_fd, map2) =3D=3D 1, + "Test %s-anon soft-dirty after merge 2nd pg\n", + __func__); + + munmap(map, 2 * pagesize); +} + static void test_mprotect_anon(int pagemap_fd, int pagesize) { test_mprotect(pagemap_fd, pagesize, true); @@ -204,7 +252,7 @@ int main(int argc, char **argv) if (!softdirty_supported()) ksft_exit_skip("soft-dirty is not support\n"); =20 - ksft_set_plan(15); + ksft_set_plan(17); pagemap_fd =3D open(PAGEMAP_FILE_PATH, O_RDONLY); if (pagemap_fd < 0) ksft_exit_fail_msg("Failed to open %s\n", PAGEMAP_FILE_PATH); @@ -216,6 +264,7 @@ int main(int argc, char **argv) test_hugepage(pagemap_fd, pagesize); test_mprotect_anon(pagemap_fd, pagesize); test_mprotect_file(pagemap_fd, pagesize); + test_merge(pagemap_fd, pagesize); =20 close(pagemap_fd); =20 --=20 2.51.0