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 lists.ozlabs.org (lists.ozlabs.org [112.213.38.117]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.lore.kernel.org (Postfix) with ESMTPS id 519C7C83013 for ; Wed, 2 Jul 2025 11:58:15 +0000 (UTC) Received: from boromir.ozlabs.org (localhost [127.0.0.1]) by lists.ozlabs.org (Postfix) with ESMTP id 4bXJLs4qBLz30T9; Wed, 2 Jul 2025 21:58:13 +1000 (AEST) Authentication-Results: lists.ozlabs.org; arc=pass smtp.remote-ip=205.220.165.32 arc.chain=microsoft.com ARC-Seal: i=2; a=rsa-sha256; d=lists.ozlabs.org; s=201707; t=1751457493; cv=pass; b=HC/DRHgO5iDu4LD/npSHuwyEvz3xuyZPwnL+M16ZJ+9okyk09fGg/zuRlK+CJ8jMfkfDZ2o3X8e81cig4KE9k+bGgrY9QURExraGVI17VZCMFSsELAaa7MCCTtzIjYez2tdTTClYSbm33TeC5YQIsBtk6XEF7esNCO2gZTF10oUL9qtgNFHhyHszAopDxaHU7QImTsLu8iLYFXzq0MezRUEBaqQ6KXsVNP2OuSsPMJi+NDAZCURD0nMdsoPzfmFoPC/3OJHRibHa5S3TasCQeyEHOHaTxywvIYvdCfRuvfYt8tIcWwV20v9NdImBnr6hxuewPejLrMJlF+Z31WkigQ== ARC-Message-Signature: i=2; a=rsa-sha256; d=lists.ozlabs.org; s=201707; t=1751457493; c=relaxed/relaxed; bh=/bVOOtHPPJs9mUJ6eZEIhHMUA/ujG9hcW1nkWFHOWe0=; h=Date:From:To:Cc:Subject:Message-ID:References:Content-Type: Content-Disposition:In-Reply-To:MIME-Version; b=ke1sJqqnpIYfqcd7wPbSnWy3NcpCf4TPh2pOvQgXK+Ma4LdsLI8T8PnvM4CAvAfy/cvKLCaCULVyfAvaQHDzFsngADhfyNwRyzbsz9y5L7gAgwfh+wmzzetIsOiC6VKTD397N8e+UUyx1Gtn1c39l9dQdOHPdJyyKdLPEl6cj0/1UoyoABb1gBdpXfqfIz6E7M88ZxzvqtcJzM/TGwWc0svqR1ZU6SwSAZ//7PA0HNu8pEiZSlOmhFDwnTs+9Wn1aqqqWgplWTIp2kqCQQY+EcIJeJrOufDeMm3Qekoay/O+7qVGwIGWNkajhGeEkVSoov7MOObSGODaxLss5eLGGA== ARC-Authentication-Results: i=2; lists.ozlabs.org; dmarc=pass (p=reject dis=none) header.from=oracle.com; dkim=pass (2048-bit key; unprotected) header.d=oracle.com header.i=@oracle.com header.a=rsa-sha256 header.s=corp-2025-04-25 header.b=UP4B0+tk; dkim=pass (1024-bit key; unprotected) header.d=oracle.onmicrosoft.com header.i=@oracle.onmicrosoft.com header.a=rsa-sha256 header.s=selector2-oracle-onmicrosoft-com header.b=hs/4mjrb; dkim-atps=neutral; spf=pass (client-ip=205.220.165.32; helo=mx0a-00069f02.pphosted.com; envelope-from=harry.yoo@oracle.com; receiver=lists.ozlabs.org) smtp.mailfrom=oracle.com Authentication-Results: lists.ozlabs.org; dmarc=pass (p=reject dis=none) header.from=oracle.com Authentication-Results: lists.ozlabs.org; dkim=pass (2048-bit key; unprotected) header.d=oracle.com header.i=@oracle.com header.a=rsa-sha256 header.s=corp-2025-04-25 header.b=UP4B0+tk; dkim=pass (1024-bit key; unprotected) header.d=oracle.onmicrosoft.com header.i=@oracle.onmicrosoft.com header.a=rsa-sha256 header.s=selector2-oracle-onmicrosoft-com header.b=hs/4mjrb; dkim-atps=neutral Authentication-Results: lists.ozlabs.org; spf=pass (sender SPF authorized) smtp.mailfrom=oracle.com (client-ip=205.220.165.32; helo=mx0a-00069f02.pphosted.com; envelope-from=harry.yoo@oracle.com; receiver=lists.ozlabs.org) 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 lists.ozlabs.org (Postfix) with ESMTPS id 4bXJLr68jYz2ypV for ; Wed, 2 Jul 2025 21:58:12 +1000 (AEST) Received: from pps.filterd (m0246629.ppops.net [127.0.0.1]) by mx0b-00069f02.pphosted.com (8.18.1.2/8.18.1.2) with ESMTP id 562BjAk4021594; Wed, 2 Jul 2025 11:57:21 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=/bVOOtHPPJs9mUJ6eZ EIhHMUA/ujG9hcW1nkWFHOWe0=; b=UP4B0+tkmfq66oSYA2jLM4hcGQksTWPh8x eTPChNCn6ZVm5HDUQfcurF0dNfD6QdvQTclOtDx52gmFgbRGVnPpXaV5EdhywcXU liNY3UjAzDdYwL6fKfP/1fSZ5klZZckG+3vLV4UwpfyxvWKSIe3r7vnzNXym/ehq SsPgRIggIB/kwb7yNYBSpebyc2AYLEthoHTfdCjlV7pF9zdFqrQzZAlR4jSty5EC BC0/1H7GaiQ5wSMGKT7NqtTuISys+gtCS9og6ujZR64Q6WF3GPxtO+na8nduh93Z 8pg3kdPcZ7+cavE73bSN/cItVycE9CuGYBZEi7u9pc9EGMHfE/bw== Received: from iadpaimrmta02.imrmtpd1.prodappiadaev1.oraclevcn.com (iadpaimrmta02.appoci.oracle.com [147.154.18.20]) by mx0b-00069f02.pphosted.com (PPS) with ESMTPS id 47jum7x1qr-1 (version=TLSv1.2 cipher=ECDHE-RSA-AES256-GCM-SHA384 bits=256 verify=OK); Wed, 02 Jul 2025 11:57:20 +0000 (GMT) Received: from pps.filterd (iadpaimrmta02.imrmtpd1.prodappiadaev1.oraclevcn.com [127.0.0.1]) by iadpaimrmta02.imrmtpd1.prodappiadaev1.oraclevcn.com (8.18.1.2/8.18.1.2) with ESMTP id 5629tDMO030342; Wed, 2 Jul 2025 11:57:19 GMT Received: from nam10-bn7-obe.outbound.protection.outlook.com (mail-bn7nam10on2085.outbound.protection.outlook.com [40.107.92.85]) by iadpaimrmta02.imrmtpd1.prodappiadaev1.oraclevcn.com (PPS) with ESMTPS id 47j6ub59t3-1 (version=TLSv1.2 cipher=ECDHE-RSA-AES256-GCM-SHA384 bits=256 verify=OK); Wed, 02 Jul 2025 11:57:19 +0000 ARC-Seal: i=1; a=rsa-sha256; s=arcselector10001; d=microsoft.com; cv=none; b=u82SavNTPdpt3Yw06rj6k8xbawWCXDh/7YS0GpfTIt18TBEW7iYZEZqGsfN3qMfFuGlehyx3CrxcZWaWDd0NLYO+lHsByas7SayJ2/shHu9gA/nBDJgKcL1KQH6swPHYopDxo2gwSwZx21HDP4Qv1vDw3+yvuk+i1RSObvtTBrhVVyVeFtW17UeqoBvQ8433WaEMkYxpz/eB4Z60uDVv3PMBlxqY9EeleM5R1AIWmbNzsx9IQqPfZfX+Rejbxes9NHrIzpJe+RfkxEO637unCVNY8+mItLB2EMR9GrGvwF2TcUopR2YV92IgH4i81qguOxeD8EnRgOzp7BIloHB8SQ== 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=/bVOOtHPPJs9mUJ6eZEIhHMUA/ujG9hcW1nkWFHOWe0=; b=u8YnlcelBE+fHRBF6/zJBXJgYpFhFc2Ulqwb7Jau9zyVlRkTIlcdYarYtKD3VvfUhacwPYfnklaw7W3z8qoVMh0FMM+uxPyzYBSgURtxgS4CfK6ngVr0n3Nd3gBK6tjZpXFRNcVue+WTyNl0+PcQWapDdaH9oarVtxynO+uQuh+LeKHvYgePLd95QTf6AOaeesuim0zdHOO2QqaAsO0gSquyWuWV/k7UOpDqOTeagqbypbIG7O4Mfx/nvgOOIkIIPXEKzvRH70yPOnNgi2HMIYxb2HKgPeu3EsSGuTs3VvKdUFgqaxsIkDgFWJB7wS72PU40SoQJdbXeBVzXSaKCjA== 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=/bVOOtHPPJs9mUJ6eZEIhHMUA/ujG9hcW1nkWFHOWe0=; b=hs/4mjrb1Q597PmG298dHOj8szIC3pxqIcqsKsx4+naE3bhBM8SteCC4ikyKYWAJmMlhefEpcghS6apiKs8iaG5TUjl1NjL0DrsokI+q2QECJm8MILhlQOHlAbnJP81B6vbk14b5iUq40t3GDcCCQkn68gi6NgJnuGGtW8dPChw= Received: from CH3PR10MB7329.namprd10.prod.outlook.com (2603:10b6:610:12c::16) by PH0PR10MB5778.namprd10.prod.outlook.com (2603:10b6:510:12b::13) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id 15.20.8880.16; Wed, 2 Jul 2025 11:57:16 +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; Wed, 2 Jul 2025 11:57:16 +0000 Date: Wed, 2 Jul 2025 20:57:03 +0900 From: Harry Yoo To: David Hildenbrand Cc: 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 , Zi Yan , Matthew Brost , Joshua Hahn , Rakie Kim , Byungchul Park , Gregory Price , Ying Huang , Alistair Popple , Lorenzo Stoakes , "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 19/29] mm: stop storing migration_ops in page->mapping Message-ID: References: <20250630130011.330477-1-david@redhat.com> <20250630130011.330477-20-david@redhat.com> <819b61fb-ebb0-4ded-a104-01ab133b6a41@redhat.com> Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: X-ClientProxiedBy: SEWP216CA0062.KORP216.PROD.OUTLOOK.COM (2603:1096:101:2ba::16) To CH3PR10MB7329.namprd10.prod.outlook.com (2603:10b6:610:12c::16) X-Mailing-List: linuxppc-dev@lists.ozlabs.org List-Id: List-Help: List-Owner: List-Post: List-Archive: , List-Subscribe: , , List-Unsubscribe: Precedence: list MIME-Version: 1.0 X-MS-PublicTrafficType: Email X-MS-TrafficTypeDiagnostic: CH3PR10MB7329:EE_|PH0PR10MB5778:EE_ X-MS-Office365-Filtering-Correlation-Id: 4604a645-7131-41ba-bfb6-08ddb95f96c8 X-MS-Exchange-SenderADCheck: 1 X-MS-Exchange-AntiSpam-Relay: 0 X-Microsoft-Antispam: BCL:0;ARA:13230040|366016|376014|7416014|1800799024|7053199007; X-Microsoft-Antispam-Message-Info: =?us-ascii?Q?nPwCuax2q33pEjJLvXIAAAv++4L6S0lJ7zu8Esh790JO9d5oT+OGXczG/6+n?= =?us-ascii?Q?CX7oYUqQug8cho3TymqFoqNVjs5qzpT60u8oYknc64L1Qf5AGR88F76Z41g3?= =?us-ascii?Q?yStkxyUCeI0vRcXQKupWLzsezrsxFEClEQMIGy3EkQWFhG9+oMJYVsaJcPY5?= =?us-ascii?Q?zRsdjlg+jZ8U1vA9okrWhLk35Y3RWiOYXe6j+isT3V4JJbMWpnPtRsUKQ+No?= =?us-ascii?Q?bb78wlse1wy7sJAkLt453TTn1Z8ZlzZh6xdOt9rrtSs8Wv9RkoQbgXPQLb/z?= =?us-ascii?Q?8iSwKTncA1W9DbMP0EN6X4L0mwP1rgoHQwelay7vYU6zQ86suEWEmVETh1LC?= =?us-ascii?Q?ay6U/P2TE2obpPpyniGUrImTcTGnrzeKGCEK803p1REd1MWe4QlLvvqqh1Kc?= =?us-ascii?Q?e1Gwo5EOhmF0UoCN+C/2/NsU4z4EgjYAPMR2dyWhDQTUjcj2HWv0XEpSAKTf?= =?us-ascii?Q?GLWS9Hwzj5S4zQiqOPt73207s9TSIOhiG4GnKy7/rvRplmD5Af+rMDsBG9+Z?= =?us-ascii?Q?or1u/gfDNHyBV252fxNKekJXpiQU+Uwkinr+/XKKqyuFOKSNX8b/LZJz1b4P?= =?us-ascii?Q?A29RNKEqFkbtllw5TA7hnRy2Q5bbB8WrXOVgDd4MktxhG+OJT/Fi/LIMY/Sh?= =?us-ascii?Q?UByYkK9MvYtElosZYofMnFNSEJdD9GeKou9q5Lg6UqAiAVIwwlrFM+tmkafd?= =?us-ascii?Q?TH7iceC1bDudXSUZys3BP713pmsSWBtCCmrdooo4FEVKKzLCywi+Y2ugAm9f?= =?us-ascii?Q?+ODIY5tAP8YdE18OB4j307mzEGE4TjS7i/IBVD/ZzRanv7GwPG73U4aANTZ3?= =?us-ascii?Q?/iFOnzx9+UoUB3fjLnkbFBogfjtok6oQsIuv2O8ll8XutOeCjQXtBYKz8me3?= =?us-ascii?Q?/aGGBZKthRQX38LORQM6HnSgw4MaFjoGBZyp9PsbIfWDq/80mh3tzncz1hb3?= =?us-ascii?Q?kOJZCuMsTpOWae0Z+qeWWUzS0Hv9vsHXJnzVnrxYF/33FG2kwkXKmtN65wqZ?= =?us-ascii?Q?cnSVor71XiLfbyCC2i27OizP3KV5/EENJK+E7j6AdyMnrrnL9uOJM5I0+ury?= =?us-ascii?Q?vUTkV9usLI8DX7mZhptwAA+TB6cas/smYZvGZ4UbJCop0lWyq2+Tl12fBgZj?= =?us-ascii?Q?79JYd//WWEbkX+uSZZ89/VbXVkfuZIPE2bSGGOgkVbX6TDD1j9vHnMBXAIKi?= =?us-ascii?Q?0eRrLUQyVL6tTqqKvD7+vvHypcFNfFJ2oC6stLsDv6IfUqOPa18xmu/vcf9C?= =?us-ascii?Q?lnwSEAzQXZQrhrIUzxxBvDJzKyQ5QshxtP6lrop/zq810g2h4cw1aiZTWw4J?= =?us-ascii?Q?ShWcTRm7RCPDsfTcSVekU1ebEJGJL6piOyu++Kxya5QhT+lHwK4cO+GIbcG5?= =?us-ascii?Q?ePHn+vMc92KVXDQorlhIKdUTaNN0kRrn2P5a/C3nhxruBQiS9LZqiNpp721S?= =?us-ascii?Q?L54GLogt3u8=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)(376014)(7416014)(1800799024)(7053199007);DIR:OUT;SFP:1101; X-MS-Exchange-AntiSpam-MessageData-ChunkCount: 1 X-MS-Exchange-AntiSpam-MessageData-0: =?us-ascii?Q?6yAukfR4jT8u5uvUkECvtD28C9YvBnHRqfIVhzwgGxy86L7nTo9BFpeZMeso?= =?us-ascii?Q?8eG40lAocEss4jDX8xj/ffqxMo1LXCkIOOiHhOYw6xLDSiJ6rgSiTSgI463u?= =?us-ascii?Q?TxCme3EhsjqfnvDE9qM/mZeKEOnWpDBjzYqNj1ZM4qH0gd86vXb7P4wbqQ6o?= =?us-ascii?Q?RrrXPV1m/x5ZFmsxsXFm7DxL6MdWGSocerEirNcukYoc3+tlRjKOL5EVax4r?= =?us-ascii?Q?GNSXgsAY0NytkElyh/9nZH7kGUvfeCfWVr/P5jg3+NhnAmvuJ2KZhwX5s/69?= =?us-ascii?Q?llANDw6rrQU20g8oVv8ot4ecqk2qRkrzAf+QsqSc6Srl/UnmOupKJ9EcW5jo?= =?us-ascii?Q?BCMl/YyphANDLGY9k94lZgB9hZyR9oXaPH2yRyjK8Req4HyxqNGjIrnGJP8h?= =?us-ascii?Q?VAFVxHQHebVIvlHDY2h9FqsXm/Ou5OFhC+SCoVwYT9BPI3niFpwtFdtykxyW?= =?us-ascii?Q?PycVPLT3aSCt2TBcYoanRfvWZQQXJKYiqi32V5ywY7DOJ6zdxhNRGeaUpu+v?= =?us-ascii?Q?5eGJRyouMS7qWxJBGrxlRgvG3p8w738gWkGu+aezCD60VMwwkZqdEUQ9OZMK?= =?us-ascii?Q?XDlQCwwlerVgq+9HH+XakITaEp0p3NeCiR8sRUer0QLjm1y4YxCAvvhTtCAL?= =?us-ascii?Q?5bvC6el0EPOMV3i8aBgSoREIs06ZV5LIl9P8d4xl5MP3AnkPJloBPHQeoDUG?= =?us-ascii?Q?7vSQdp2bB79u7yXExIRP3xG7k0cf3QCsLlgaPGnvHhddPmjJDMjyd2ah9Lvx?= =?us-ascii?Q?lazbiVUkHoOsFet3PmtTpOXdSqEsaOeOetBGIqV33rV3LvHoCUy3hPxQ1lLk?= =?us-ascii?Q?TrdVxhlTldlaFzt70I+aV9pjqgXJMK82fH5Ueo03bKoyBC9M4UowbOQX1KQU?= =?us-ascii?Q?8l5IzivII8dJITlJlN3J6X3BumNDw4yuRLcBd5yupob8WJ7KmbL/CjKA9Wty?= =?us-ascii?Q?IO6WfuLYTT4n0qQwu1gqbk+05hJleR1lP6bfNgiiGX7aohJ+BW8sMMt6iUNC?= =?us-ascii?Q?ew5SSDpQlI+nw1sfJAcKb+xiRRtma9i6eC7nEtgoTkGLXA6gDsZ7BwgI9x98?= =?us-ascii?Q?0O7+5iueRF9tkkGxBu6zBOO8KH+zQ/ktePPCn1mYzmF1lzmXBNaIWj7arRw9?= =?us-ascii?Q?Pjkt+6K/rg6vqTpebB0lpOIFhwimS9Fea1osfPsOSdMMWne+k3i3Cd5P9Wr7?= =?us-ascii?Q?m3kni3E+0HWiApIWpr4WNMUX2KPVa16554iaY0oY/oNXArnzdOZ5TvU7+mop?= =?us-ascii?Q?m9Rcv7rzXb+YMsZ71eeBR00lmM+8zAjuoKfRb4Jfo98Ts+/+Fe3G24Ok3uqF?= =?us-ascii?Q?rZVUW/F8qFc/QmIzk0U/uwbOQ2nj1hdUohKqLl0wlgwDTyLjnaKhmfkzC7WI?= =?us-ascii?Q?p2JGw8mnmPYG0THB8DVVjBFGkz8KQUuQCT4n3jZQUqKX2xXkdFjlUNzLUgiZ?= =?us-ascii?Q?Y52ngoqllCSf+RmFlDp8KMIa0llS6G+EPsMr5RPYMEOA/NOT/hPMWNf+TFTY?= =?us-ascii?Q?NOXrfniDgx7y0QBWuoFYrJ2yLpJUNIoGBCsyJimquYn1t2cjSi0GvxC1V3Cn?= =?us-ascii?Q?5Bad4AYjClW5sdYsZWBtxcDNmQ4RVcpWCs3Mk0JM?= 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: 4604a645-7131-41ba-bfb6-08ddb95f96c8 X-MS-Exchange-CrossTenant-AuthSource: CH3PR10MB7329.namprd10.prod.outlook.com X-MS-Exchange-CrossTenant-AuthAs: Internal X-MS-Exchange-CrossTenant-OriginalArrivalTime: 02 Jul 2025 11:57:16.1133 (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: HYAzg/lF5g58akbp/VucO4/UV6SkQG3W09B6rm7pUNcfNpmBFLvH0JBiXgCoknf08rv4Pfr6o8tu827nj/Ix5w== X-MS-Exchange-Transport-CrossTenantHeadersStamped: PH0PR10MB5778 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=2025-07-02_01,2025-06-27_01,2025-03-28_01 X-Proofpoint-Spam-Details: rule=notspam policy=default score=0 bulkscore=0 spamscore=0 suspectscore=0 phishscore=0 mlxlogscore=999 mlxscore=0 adultscore=0 malwarescore=0 classifier=spam adjust=0 reason=mlx scancount=1 engine=8.12.0-2505160000 definitions=main-2507020096 X-Proofpoint-Spam-Details-Enc: AW1haW4tMjUwNzAyMDA5NyBTYWx0ZWRfX9A4I6mHpoiaA U2emza/08a+MXY4WYIPmxNPjKWFDaEhuja0M8ZRh6UUAn1tjt4cNy5vIl1d9stuprWbdH1ZHXl8 wOU5z9pNSMj9L8r02YGZVdcSGqtVFGz6yV8E8PfqPrhJ698mDRU5q70ke7oPYsQq08Svl31HuSK 7x1ZqdwOAxTVkFtVDpiDo/ho5sht9LKrE7HKfqaV8MlIxFa7s+Ud0qvOGN/cu4y2pF3jMsvpd5+ weK19T+/YyO61cQKq1M1GY1mWhzTWBbb7Yip0+9khaZ2xD2hM3gi8xU2FnGyTJCkaOPwfIPtEWy dLmP7aDfCt22Iix90u8Qq1bEEgLJhal3E//xaA6cwoOndsyetnDL5ZDSYO+nHrUCWNE4uUIhOaq ylk33WjPKVykk1RwRxotIN3U+lNoIMA6J3tkJb1Aq9Q+Elb+BfwfObai1D9GwqHX1h5KuwHq X-Authority-Analysis: v=2.4 cv=MvBS63ae c=1 sm=1 tr=0 ts=68651ea1 b=1 cx=c_pps a=e1sVV491RgrpLwSTMOnk8w==:117 a=e1sVV491RgrpLwSTMOnk8w==: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=Ikd4Dj_1AAAA:8 a=20KFwNOVAAAA:8 a=qijfBcOE5NdOuzqw85cA:9 a=CjuIK1q_8ugA:10 cc=ntf awl=host:14723 X-Proofpoint-ORIG-GUID: 70aEA4Lfcb19cXT-MDWHB59-mKqDsk1S X-Proofpoint-GUID: 70aEA4Lfcb19cXT-MDWHB59-mKqDsk1S On Wed, Jul 02, 2025 at 01:51:52PM +0200, David Hildenbrand wrote: > On 02.07.25 13:43, Harry Yoo wrote: > > On Wed, Jul 02, 2025 at 01:04:05PM +0200, David Hildenbrand wrote: > > > On 02.07.25 12:34, Harry Yoo wrote: > > > > On Mon, Jun 30, 2025 at 03:00:00PM +0200, David Hildenbrand wrote: > > > > > ... instead, look them up statically based on the page type. Maybe in the > > > > > future we want a registration interface? At least for now, it can be > > > > > easily handled using the two page types that actually support page > > > > > migration. > > > > > > > > > > The remaining usage of page->mapping is to flag such pages as actually > > > > > being movable (having movable_ops), which we will change next. > > > > > > > > > > Reviewed-by: Zi Yan > > > > > Signed-off-by: David Hildenbrand > > > > > --- > > > > > > > > > +static const struct movable_operations *page_movable_ops(struct page *page) > > > > > +{ > > > > > + VM_WARN_ON_ONCE_PAGE(!page_has_movable_ops(page), page); > > > > > + > > > > > + /* > > > > > + * If we enable page migration for a page of a certain type by marking > > > > > + * it as movable, the page type must be sticky until the page gets freed > > > > > + * back to the buddy. > > > > > + */ > > > > > +#ifdef CONFIG_BALLOON_COMPACTION > > > > > + if (PageOffline(page)) > > > > > + /* Only balloon compaction sets PageOffline pages movable. */ > > > > > + return &balloon_mops; > > > > > +#endif /* CONFIG_BALLOON_COMPACTION */ > > > > > +#if defined(CONFIG_ZSMALLOC) && defined(CONFIG_COMPACTION) > > > > > + if (PageZsmalloc(page)) > > > > > + return &zsmalloc_mops; > > > > > +#endif /* defined(CONFIG_ZSMALLOC) && defined(CONFIG_COMPACTION) */ > > > > > > > > What happens if: > > > > CONFIG_ZSMALLOC=y > > > > CONFIG_TRANSPARENT_HUGEPAGE=n > > > > CONFIG_COMPACTION=n > > > > CONFIG_MIGRATION=y > > > > > > Pages are never allocated from ZONE_MOVABLE/CMA and > > > > I don't understand how that's true, neither zram nor zsmalloc clears > > __GFP_MOVABLE when CONFIG_COMPACTION=n? > > > > ...Or perhaps I'm still missing some pieces ;) > > You might have found a bug in zsmalloc then :) Without support for compaction, we > must clear __GFP_MOVABLE in alloc_zpdesc() I assume. > > Do you have the capacity to look into that and send a fix if really broken? I'll add that to somehwere in my TODO list :) 1) confirming if it's really broken and 2) fixing it if so. > In balloon compaction code we properly handle that. -- Cheers, Harry / Hyeonggon