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 65003C7EE30 for ; Tue, 1 Jul 2025 06:15:00 +0000 (UTC) Received: by kanga.kvack.org (Postfix) id E0F2F6B009A; Tue, 1 Jul 2025 02:14:59 -0400 (EDT) Received: by kanga.kvack.org (Postfix, from userid 40) id DE72C6B009B; Tue, 1 Jul 2025 02:14:59 -0400 (EDT) X-Delivered-To: int-list-linux-mm@kvack.org Received: by kanga.kvack.org (Postfix, from userid 63042) id CAF696B009C; Tue, 1 Jul 2025 02:14:59 -0400 (EDT) X-Delivered-To: linux-mm@kvack.org Received: from relay.hostedemail.com (smtprelay0015.hostedemail.com [216.40.44.15]) by kanga.kvack.org (Postfix) with ESMTP id B9EF66B009A for ; Tue, 1 Jul 2025 02:14:59 -0400 (EDT) Received: from smtpin15.hostedemail.com (a10.router.float.18 [10.200.18.1]) by unirelay10.hostedemail.com (Postfix) with ESMTP id 304ADC02F7 for ; Tue, 1 Jul 2025 06:14:59 +0000 (UTC) X-FDA: 83614682718.15.F791F88 Received: from mx0a-00069f02.pphosted.com (mx0a-00069f02.pphosted.com [205.220.165.32]) by imf25.hostedemail.com (Postfix) with ESMTP id AACC6A0003 for ; Tue, 1 Jul 2025 06:14:55 +0000 (UTC) Authentication-Results: imf25.hostedemail.com; dkim=pass header.d=oracle.com header.s=corp-2025-04-25 header.b=Xhgwbh35; dkim=pass header.d=oracle.onmicrosoft.com header.s=selector2-oracle-onmicrosoft-com header.b=lVHpd38K; spf=pass (imf25.hostedemail.com: domain of harry.yoo@oracle.com designates 205.220.165.32 as permitted sender) smtp.mailfrom=harry.yoo@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=1751350496; 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=PbfbYLOOcrwxczaz3qyfDXe2R6eZYjAiNcshTcUs88k=; b=aesey7ehHXeJHSWT5Azxn/hifXNzg6OMp9zJ5+e/AKdb8h5zIQVMbck3qmemSZx5C7XVtz ems7Fm8oMruIipXPJd7wo5PKN7J4/6A6QUPjTKggT7CM6M+XKRvJb6UxHzdoUPx49F/3ky tywo9w/M3+liANsJkxZ/dI3Nv6zmeFM= ARC-Authentication-Results: i=2; imf25.hostedemail.com; dkim=pass header.d=oracle.com header.s=corp-2025-04-25 header.b=Xhgwbh35; dkim=pass header.d=oracle.onmicrosoft.com header.s=selector2-oracle-onmicrosoft-com header.b=lVHpd38K; spf=pass (imf25.hostedemail.com: domain of harry.yoo@oracle.com designates 205.220.165.32 as permitted sender) smtp.mailfrom=harry.yoo@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=1751350496; a=rsa-sha256; cv=pass; b=aJt3+kF2J1WTlctYlTsN9HncozhvvoFxruBXqkCoDEO898NmZcCb2IR88PAD1ABqgmuySZ lrnmLJZ3xKKvMAqg7zOwtfTVatnH2kwiKJ60kvlD8rcgMUITFxBP5AvWO9KvQIPrxT2gGt KxyKJpkYGoe1iPLOXUZ5RMQpwtH3HHo= 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 5611Msor005251; Tue, 1 Jul 2025 06:14:06 GMT DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=oracle.com; h=cc :content-type:date:from:in-reply-to:message-id:mime-version :references:subject:to; s=corp-2025-04-25; bh=PbfbYLOOcrwxczaz3q yfDXe2R6eZYjAiNcshTcUs88k=; b=Xhgwbh35zys/WyC6nKCCKQpGET+1CpHyAx SDLeLs6KP1dN6E1kP+7UQDYEyG8l7ejEhAE51eT4xkjpNYQ3xDS25qUesCJzn6q5 hD2ICdrXkR+AX7kkAD4ulY3G/5cAsNMYsrqoqpAaczlGQjnG4JKQnZsh4sSlA1V/ Uutc7vZtEDDQHx7LPt9F6ZOnrrYwPlkqJ6Qn+yRh2LlsYTP+gp1ZvoaaCq/GrIM8 7XIC8p/oN3B0uSIgviUi2FU2DEImm2IHk2fyaVmfKu+VEJBDV7JzmTWrT92GhwUk vT+cgUlOP3bv5ed5SD3RHwOGmWZz1kPuhrPwOabQPYCEX4Ev9c3g== Received: from phxpaimrmta02.imrmtpd1.prodappphxaev1.oraclevcn.com (phxpaimrmta02.appoci.oracle.com [147.154.114.232]) by mx0b-00069f02.pphosted.com (PPS) with ESMTPS id 47j7af3y0x-1 (version=TLSv1.2 cipher=ECDHE-RSA-AES256-GCM-SHA384 bits=256 verify=OK); Tue, 01 Jul 2025 06:14:06 +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 5615Te27025811; Tue, 1 Jul 2025 06:14:05 GMT Received: from nam12-bn8-obe.outbound.protection.outlook.com (mail-bn8nam12on2078.outbound.protection.outlook.com [40.107.237.78]) by phxpaimrmta02.imrmtpd1.prodappphxaev1.oraclevcn.com (PPS) with ESMTPS id 47j6u9aj88-1 (version=TLSv1.2 cipher=ECDHE-RSA-AES256-GCM-SHA384 bits=256 verify=OK); Tue, 01 Jul 2025 06:14:05 +0000 ARC-Seal: i=1; a=rsa-sha256; s=arcselector10001; d=microsoft.com; cv=none; b=stlltpYK3liyYmIIo1kjLcGC9p94gjCiz3Ye4vTZWsw5tWzQlrg8z/Y9RB0sFER+y34QgsSb05x1tXIREAr0W3gnRK8Np3avSqGXhGvIgWZZyYtNzOZ3fMNxdW7ktu9YaFPDIDZ8KN7Xcuu06A8gRLiXp0awRkhufNYKRHKmoflP3tZOXJ0h3WBnkVhKnMiv/ZfRgm57ICPbtiWYirq1G43tMburo2Xk7hPmrSfMGWsEDCva+11F+mC+ns/qCED3OigmLRF/LtWewwWkqRRdJiAw4JXhoPuR57LcnN1uFfX/dMmnTvQOQGeUBJEV3jRK9RSHZ+5pCqDmRxlu5QhovQ== 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=PbfbYLOOcrwxczaz3qyfDXe2R6eZYjAiNcshTcUs88k=; b=ZvkWBf77tOkfogmwvtnT2dWmxJbwrqXs17WQ0WsuKydZLkEtJ5XLaQoAjsKqCZAs1yqHQdHD1eS9VBOeDnDMjNoJ/KAP1JaxHFeDg98CeiZ4DRZN0ytfobBIO9fBv5Zui6+gze30XoU3lWUmD9fY887uezFcLN4H8IMrDmdDIh4k4bo6IGVOlv+n1knUQPZ5iXf1+VmYOFarha4VZUxtGV9q2a9vSg0LxCPyShUHoWg2jfTdhuC959a3kA7/Qe0HAU+wM9S5l2qick+Qv9QjRorFCbq9kh+pOOMY1jY8Huvye7Q4ktlPqcv/jaFurpEqVsuIIic8iMIQhPaTorTLLQ== 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=PbfbYLOOcrwxczaz3qyfDXe2R6eZYjAiNcshTcUs88k=; b=lVHpd38K7JbVTeaV9ewDgdI4cwSkgccxe/fOnFjTdWFCcoHymm9NyVisQGmRvhSvdQeHEUw6azkxc/upRm3CaasJN5piu0vC6cBl4n+CekSE3BDpi+RyQYK+z24jmRjhWV1dKqaHwoN1ueAo/KQy6ROlOlLMwMp1PAoZ46RRq/o= Received: from CH3PR10MB7329.namprd10.prod.outlook.com (2603:10b6:610:12c::16) by DS0PR10MB7067.namprd10.prod.outlook.com (2603:10b6:8:145::16) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id 15.20.8880.29; Tue, 1 Jul 2025 06:13:57 +0000 Received: from CH3PR10MB7329.namprd10.prod.outlook.com ([fe80::c2a4:fdda:f0c2:6f71]) by CH3PR10MB7329.namprd10.prod.outlook.com ([fe80::c2a4:fdda:f0c2:6f71%6]) with mapi id 15.20.8880.029; Tue, 1 Jul 2025 06:13:56 +0000 Date: Tue, 1 Jul 2025 15:13:43 +0900 From: Harry Yoo To: Zi Yan Cc: Lorenzo Stoakes , David Hildenbrand , linux-kernel@vger.kernel.org, linux-mm@kvack.org, linux-doc@vger.kernel.org, linuxppc-dev@lists.ozlabs.org, virtualization@lists.linux.dev, linux-fsdevel@vger.kernel.org, Andrew Morton , Jonathan Corbet , Madhavan Srinivasan , Michael Ellerman , Nicholas Piggin , Christophe Leroy , Jerrin Shaji George , Arnd Bergmann , Greg Kroah-Hartman , "Michael S. Tsirkin" , Jason Wang , Xuan Zhuo , Eugenio =?iso-8859-1?Q?P=E9rez?= , Alexander Viro , Christian Brauner , Jan Kara , Matthew Brost , Joshua Hahn , Rakie Kim , Byungchul Park , Gregory Price , Ying Huang , Alistair Popple , "Liam R. Howlett" , Vlastimil Babka , Mike Rapoport , Suren Baghdasaryan , Michal Hocko , "Matthew Wilcox (Oracle)" , Minchan Kim , Sergey Senozhatsky , Brendan Jackman , Johannes Weiner , Jason Gunthorpe , John Hubbard , Peter Xu , Xu Xin , Chengming Zhou , Miaohe Lin , Naoya Horiguchi , Oscar Salvador , Rik van Riel , Qi Zheng , Shakeel Butt Subject: Re: [PATCH v1 05/29] mm/balloon_compaction: make PageOffline sticky until the page is freed Message-ID: References: <20250630130011.330477-1-david@redhat.com> <20250630130011.330477-6-david@redhat.com> <6a6cde69-23de-4727-abd7-bae4c0918643@lucifer.local> <595C96DA-C652-455F-91DB-F7893B95124B@nvidia.com> Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <595C96DA-C652-455F-91DB-F7893B95124B@nvidia.com> X-ClientProxiedBy: SEWP216CA0007.KORP216.PROD.OUTLOOK.COM (2603:1096:101:2b4::13) To CH3PR10MB7329.namprd10.prod.outlook.com (2603:10b6:610:12c::16) MIME-Version: 1.0 X-MS-PublicTrafficType: Email X-MS-TrafficTypeDiagnostic: CH3PR10MB7329:EE_|DS0PR10MB7067:EE_ X-MS-Office365-Filtering-Correlation-Id: 21c701ed-01c5-40f7-4ce7-08ddb8667601 X-MS-Exchange-SenderADCheck: 1 X-MS-Exchange-AntiSpam-Relay: 0 X-Microsoft-Antispam: BCL:0;ARA:13230040|366016|1800799024|376014|7416014|7053199007; X-Microsoft-Antispam-Message-Info: =?us-ascii?Q?AXySWg5FyTCbUF1Q7ax/tNvzvz4FVig0jNcY1gZgeg7LzggXlqOY9E+ai3xj?= =?us-ascii?Q?gT6m26S77RngcKTvLoYt4ewwtEi3og6b+XyvVuxyF1BrDr+PIFdMXRnkXwyM?= =?us-ascii?Q?xSkLEMxXRcg4FFO+NtS8+ssQ0mGCVKK0RiWbJKPrySlDEYtT4vjciVuq0rjl?= =?us-ascii?Q?tmkQGLojAS7JfBU7FQkPy2doHcSfPM8IsQtRqCuFWUIaMLiBwKAP6ScUiEd9?= =?us-ascii?Q?dRUEZXrFDgj0q3ylY6khv5KpJK+HKGCi8cULOWKe6TI2lbzr6wiJ2pY5JBp7?= =?us-ascii?Q?Wads4gV11/g4VPypvZX10c+7DV4kkJBolIsmEfI6Bjt3m2YNYdjmRlYm/btz?= =?us-ascii?Q?02ZdUCLoDXFTuIGp+oiZiA3/X0ycI8a9fo4NGLVLEeHPgp1iVwOZeLs7Wq0D?= =?us-ascii?Q?xv0pLr/t/eHXmySnugjoPEpPmuhrSa3KNq9ary+b+QbpoFX9FXPgUha90dz3?= =?us-ascii?Q?ZnC2gPSjdv4Qgq3xuSZ5+9QCiL9n3ej66MNcz/0g/Si5wqTgnYkaRfApECAN?= =?us-ascii?Q?dEQq1C2s1YoEOkbmh5n/JLcv8UbIJAoVxexs+nxLk0qW2D+ZWlLpbUkxmBjd?= =?us-ascii?Q?8d3sb41kx3l5/PShhFD3QdwdhiRL+1mM3HY1hPUXUTf7k7fLnECBC+QbFKJA?= =?us-ascii?Q?dS4+g2AV4PEspPZRfApkjgv+20Z5Rs6OxArZw+/Hi5RMDZ1dfSh74YEl3L8o?= =?us-ascii?Q?88NoX586ZjWDicmHIB4Uk9UXiiw+x1MKITxdjp/RcS3DLWGTYU9V7s4DzYng?= =?us-ascii?Q?pTcI8AWAWnSJ0iC8r9X/z0YB+UwZrW8UehqrjIlqbYLMJmJHjGRqMRQkveUU?= =?us-ascii?Q?/AM1/bwX7asSuYxbrh1OIwg/T4CxGingu8NBdsogjAIkMIiz2CS2vP7gC0wh?= =?us-ascii?Q?hHE5dvgUZo/9EAVIxz0+BXJ3fkFUpAVmE7e9MYkAakobFZLGzHnzFplVB8/U?= =?us-ascii?Q?n2d0fnlXx8MRSRZEbEbMYjnXIE1zfRk//jQJQmB6e4Pioca2bsRVZ5Ei/SBC?= =?us-ascii?Q?iVu3QQZe7NXHk7AwrcW+CXBxo2SJnJrDrlkzzieGbsVp/pPYGX2hhEO0RlWd?= =?us-ascii?Q?09PukKIEJR+cz6hBdVYxKOY70KPliqKm8+OzEoNAl7BuU8WydIxzWCuBDWhf?= =?us-ascii?Q?eoW5h4XGLGZECMjqUQfVjf09bHcCJHtA0ZgkBy59IHHxlzq/eF3xu6PFywyo?= =?us-ascii?Q?DxTR+Arkl4h9eJZvO3awvoXC12U9fEnaCHQCiQO0NhZClUfne1fTf6lcc3Z6?= =?us-ascii?Q?dcwjptSz6NmA3zL4lP4i1QI7KdYUorn/Gyhf1rCx0YX2Qsh59mP9PuM8y0Eg?= =?us-ascii?Q?QUpmBGQyOaLaDlgMEOGjInsNRgiaW0WelIooBhcdlsVwt5r+BYRMWfo/EvbP?= =?us-ascii?Q?qVmud7U=3D?= X-Forefront-Antispam-Report: CIP:255.255.255.255;CTRY:;LANG:en;SCL:1;SRV:;IPV:NLI;SFV:NSPM;H:CH3PR10MB7329.namprd10.prod.outlook.com;PTR:;CAT:NONE;SFS:(13230040)(366016)(1800799024)(376014)(7416014)(7053199007);DIR:OUT;SFP:1101; X-MS-Exchange-AntiSpam-MessageData-ChunkCount: 1 X-MS-Exchange-AntiSpam-MessageData-0: =?us-ascii?Q?AFhk87y/MGa6HAFjKtdlRx0KRQEXwa2vl3gEKK8DueXJf7vZimZSDFVzHaYR?= =?us-ascii?Q?VOp4UHqR7OMpE+itiqUOLTRrfb9AnkbW+ZbetFUzLWUceQW6uOApHqHEJbHf?= =?us-ascii?Q?/kRrURNzRvKGJvgVyKUkVKBrBbYnnVq9Y/O6dpYCX5kMjBG1BYFPZ0eK2fpw?= =?us-ascii?Q?dMaJByxkAHwd2f9H2aGZf2fSxQWzFdLwU9Xe7QuGLoqlt6YN3BoMK/Gi72xL?= =?us-ascii?Q?0PXJo4R+UEhWX16Vgvt4NJ4Ry0UY4hZX9Gxov+5e/61H+Xu0giRx6HzqdIOt?= =?us-ascii?Q?Te8Z4v3bVqQCW6YEUR4OYcsxq3OoCDDCmuW6SI020M51iDkNUqOvHtrldHlE?= =?us-ascii?Q?3NIp/+9s3xaUsIR2XoYwOWT79XKIADR5paPkF5JaujUG9vevhPH+XfnnnN6y?= =?us-ascii?Q?K10oq/vMC7jFeP9KmcE/nIiVFODO4dCQ4CAx30L4CFyuAYiP+aPs9XXDRVDK?= =?us-ascii?Q?TgH+qOQJVlOIxb/sytUfb/q7hniBPo40PR+GVMtPw1sP0HMSDgPAvRX5zkkZ?= =?us-ascii?Q?QJs6glrbTACydSkrpU54N550y7W3JrQhKvlFd0AV1eDIVnKnS90qb9jHEu7k?= =?us-ascii?Q?mEBXz8Hlpv51+qPNwHRvvz0dV8PpSK30CYPN0Gzvp2engtnIwso6awJNBePT?= =?us-ascii?Q?Q/dAPMIb+R0FfbQQerbzIJ5d879iRYihilAmBNilYQ/k1eOZTtEMq0iUs6Qf?= =?us-ascii?Q?Lo/CazAcHh+CJpK3emxH5Ix27TNLTDUu1qe8RtvlaBQNOd3DpyyCzCy0RUUe?= =?us-ascii?Q?hwPgxZqHR4n8DjVA7213BEe8z2g+cylJ0zFkXJqJvQkC892mdprBgCuTwoRi?= =?us-ascii?Q?xyNc/xobM8PZHLkl+kUjQpOVsirRgKYNREkp8b/yBATOBY3d67lNW4V+L7fL?= =?us-ascii?Q?96DIFIFZJKLZeCZNUl53sl+hLZaD97tNZtCSDH0kEUgrfHMZw1Qp3hPzkkd0?= =?us-ascii?Q?XAn0gBeqqQjeF0Jn2jI1I7iZx8TqZLnrKF6G4Uh2lftI3t7/sve7zT+tJEEP?= =?us-ascii?Q?axvrDOHcPqZN4uUH8GBFV5Pk5mCo023UXCZx25QU1ZUL6h1Ox1hzNoJwhtZJ?= =?us-ascii?Q?woSgaOrGZDgDTJYMBaI+4WLYk5Zh2ofTi7GC1kcqK09p3MvrdTkedRZpI0YF?= =?us-ascii?Q?uUW25nX9WI8ha/lAx2L5sFYhUzGWtUTSpsCQHZ9HMesT1DpRmFvkJAxED2fY?= =?us-ascii?Q?MIbG5TaHoaV/Jb1Y/JfS4nnZ5HPX3fRfOBPMxWvdPN2WJm1SZGQ8EpC5ge7C?= =?us-ascii?Q?E1sLB2okuYAfkj1fz/vLDUc5tq/JPpvj71a1MlIqZW8xivhkuu2VVWhomEJH?= =?us-ascii?Q?dZYCyNzyYTCpRFJdFxwDwIesLCUt726/puDMF7ME2/9JFtzWhmlNpznJ2vuR?= =?us-ascii?Q?RMhwcY2YLFr5/daFujGn0SWWa8TyqmTT0dkRNEv3yKZdgcn2CZik7S9xtqRI?= =?us-ascii?Q?6SkNClTggm0yli8fJ+DyfALdRQbvYsRL7JryUUEYQF9qNtcY2mHHCZtkxgOZ?= =?us-ascii?Q?COezoP8OCQH7V66qQ7wPeW0k34Gxc7A7WVD0ZGcIIxQkm2ZAEJymJ8ot/vfc?= =?us-ascii?Q?DkwKCmH4orEXBtrZ2x8iYTh34MGELqLdFpzarSrP?= 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: 21c701ed-01c5-40f7-4ce7-08ddb8667601 X-MS-Exchange-CrossTenant-AuthSource: CH3PR10MB7329.namprd10.prod.outlook.com X-MS-Exchange-CrossTenant-AuthAs: Internal X-MS-Exchange-CrossTenant-OriginalArrivalTime: 01 Jul 2025 06:13:56.4250 (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: elZ9teS7DsRuzfEst3XIOWsTL/lUKyoE58hZOBu1svF/RlL6HAr8TRD1xYpVxhsL7ke71zoE+zZ5XZx+uq0nfA== X-MS-Exchange-Transport-CrossTenantHeadersStamped: DS0PR10MB7067 X-Proofpoint-Virus-Version: vendor=baseguard engine=ICAP:2.0.293,Aquarius:18.0.1099,Hydra:6.1.7,FMLib:17.12.80.40 definitions=2025-07-01_01,2025-06-27_01,2025-03-28_01 X-Proofpoint-Spam-Details: rule=notspam policy=default score=0 malwarescore=0 spamscore=0 adultscore=0 mlxlogscore=999 phishscore=0 suspectscore=0 mlxscore=0 bulkscore=0 classifier=spam adjust=0 reason=mlx scancount=1 engine=8.12.0-2505160000 definitions=main-2507010032 X-Proofpoint-ORIG-GUID: h9LeWkKDtOFU4G5ZSme9-D4p_wCm6mrj X-Proofpoint-GUID: h9LeWkKDtOFU4G5ZSme9-D4p_wCm6mrj X-Proofpoint-Spam-Details-Enc: AW1haW4tMjUwNzAxMDAzMiBTYWx0ZWRfX7lccg4u2qGpq 6bE7lXEX+sgHDB1iRVsl51S0AYgadQfHWUj6bxeQdYb1dg8I1esNWpqwfCP64zeU9dlZDHDgPRL opetPrGhCnngl6TM0iGikCCrdhB+Pcktht5Gl6jyNV2j3IUUCq1W0TtaYMSfv01CK0VUCl1tAvI CVKVlZ13drvi2U+MHerruA5oEHHJhaw92YfoiR3leqPityoIvt9BLjf4p1aHHo6nTXzLiSQerz3 iSC0YxSqQAh/uee0H0JYVzfz6+tjNU3x0GjjxSJ+D7z/Id8mpjt9EcaZs82GLxaotb8UkegznE8 BvAEqZDT0tII1p7Re6gIK2/kkD3HQ66P5b5fq+4akC3PNoxtTIK1ORPFc6OkUppSUCCE8bYLngy iYYPK53giHN3nHk7WuDbDypyYzCNrKUpdcCh0yO3WUcPRFJAK/vjuq9VspaGd6N0Ag7/qsTx X-Authority-Analysis: v=2.4 cv=b5Cy4sGx c=1 sm=1 tr=0 ts=68637cae cx=c_pps a=OOZaFjgC48PWsiFpTAqLcw==:117 a=OOZaFjgC48PWsiFpTAqLcw==:17 a=6eWqkTHjU83fiwn7nKZWdM+Sl24=:19 a=lCpzRmAYbLLaTzLvsPZ7Mbvzbb8=:19 a=wKuvFiaSGQ0qltdbU6+NXLB8nM8=:19 a=Ol13hO9ccFRV9qXi2t6ftBPywas=:19 a=xqWC_Br6kY4A:10 a=kj9zAlcOel0A:10 a=Wb1JkmetP80A:10 a=GoEa3M9JfhUA:10 a=P-IC7800AAAA:8 a=Ikd4Dj_1AAAA:8 a=yPCof4ZbAAAA:8 a=20KFwNOVAAAA:8 a=Yjkf2zvtm9G3cYgrPQ0A:9 a=CjuIK1q_8ugA:10 a=d3PnA9EDa4IxuAV0gXij:22 X-Rspam-User: X-Rspamd-Server: rspam05 X-Rspamd-Queue-Id: AACC6A0003 X-Stat-Signature: 1juiy8m318cafapgbjpmf7u7s6ic3odm X-HE-Tag: 1751350495-757305 X-HE-Meta: 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 j7Hj2p9t 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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: On Mon, Jun 30, 2025 at 12:14:01PM -0400, Zi Yan wrote: > On 30 Jun 2025, at 12:01, Lorenzo Stoakes wrote: > > > On Mon, Jun 30, 2025 at 02:59:46PM +0200, David Hildenbrand wrote: > >> Let the page freeing code handle clearing the page type. > > > > Why is this advantageous? We want to keep the page marked offline for longer? > > > >> > >> Acked-by: Zi Yan > >> Acked-by: Harry Yoo > >> Signed-off-by: David Hildenbrand > > > > On assumption this UINT_MAX stuff is sane :)) I mean this is straightforward I > > guess: > > This is how page type is cleared. > See: https://elixir.bootlin.com/linux/v6.15.4/source/include/linux/page-flags.h#L1013. > > I agree with you that patch 4 should have a comment in free_pages_prepare() > about what the code is for and why UINT_MAX is used. Or instead of comment, maybe something like this: /* Clear any page type */ static __always_inline void __ClearPageType(struct page *page) { VM_WARN_ON_ONCE_PAGE(!page_has_type(page), page); page->page_type = UINT_MAX; } in patch 4: if (unlikely(page_has_type(page))) __ClearPageType(page); -- Cheers, Harry / Hyeonggon