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 C3A5BC76196 for ; Thu, 6 Apr 2023 21:33:02 +0000 (UTC) Received: by kanga.kvack.org (Postfix) id 466366B0071; Thu, 6 Apr 2023 17:33:02 -0400 (EDT) Received: by kanga.kvack.org (Postfix, from userid 40) id 415FD6B0074; Thu, 6 Apr 2023 17:33:02 -0400 (EDT) X-Delivered-To: int-list-linux-mm@kvack.org Received: by kanga.kvack.org (Postfix, from userid 63042) id 269A46B0075; Thu, 6 Apr 2023 17:33:02 -0400 (EDT) X-Delivered-To: linux-mm@kvack.org Received: from relay.hostedemail.com (smtprelay0010.hostedemail.com [216.40.44.10]) by kanga.kvack.org (Postfix) with ESMTP id 16D906B0071 for ; Thu, 6 Apr 2023 17:33:02 -0400 (EDT) Received: from smtpin10.hostedemail.com (a10.router.float.18 [10.200.18.1]) by unirelay02.hostedemail.com (Postfix) with ESMTP id DAC0D121398 for ; Thu, 6 Apr 2023 21:33:00 +0000 (UTC) X-FDA: 80652266520.10.46CF2AE Received: from mx0a-00069f02.pphosted.com (mx0a-00069f02.pphosted.com [205.220.165.32]) by imf02.hostedemail.com (Postfix) with ESMTP id 6DF9680026 for ; Thu, 6 Apr 2023 21:32:57 +0000 (UTC) Authentication-Results: imf02.hostedemail.com; dkim=pass header.d=oracle.com header.s=corp-2022-7-12 header.b=eJTvOCzY; dkim=pass header.d=oracle.onmicrosoft.com header.s=selector2-oracle-onmicrosoft-com header.b=RD2hJxMG; dmarc=pass (policy=none) header.from=oracle.com; spf=pass (imf02.hostedemail.com: domain of mike.kravetz@oracle.com designates 205.220.165.32 as permitted sender) smtp.mailfrom=mike.kravetz@oracle.com; arc=pass ("microsoft.com:s=arcselector9901:i=1") ARC-Message-Signature: i=2; a=rsa-sha256; c=relaxed/relaxed; d=hostedemail.com; s=arc-20220608; t=1680816777; 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=HDSXSayFepoXOS6vggL7BR2L4CmDkkTvc4TLVlMRtNM=; b=3+Nee2SnZnHG6H+ibc0FMunXkVw+CJE6AarqmFWkUcQZG5RGXjlNPa1Q69sJwAnCLCUaLU aQzcQYY45pDp6oKvlAUYbJ2dJkbft6Nudmf7gxJrdfMFxGXVnnzt0mnegxNdqFd1Vq7c2B e5h06K8wf0/UK7BRF7XaleLut9+zAeo= ARC-Authentication-Results: i=2; imf02.hostedemail.com; dkim=pass header.d=oracle.com header.s=corp-2022-7-12 header.b=eJTvOCzY; dkim=pass header.d=oracle.onmicrosoft.com header.s=selector2-oracle-onmicrosoft-com header.b=RD2hJxMG; dmarc=pass (policy=none) header.from=oracle.com; spf=pass (imf02.hostedemail.com: domain of mike.kravetz@oracle.com designates 205.220.165.32 as permitted sender) smtp.mailfrom=mike.kravetz@oracle.com; arc=pass ("microsoft.com:s=arcselector9901:i=1") ARC-Seal: i=2; s=arc-20220608; d=hostedemail.com; t=1680816777; a=rsa-sha256; cv=pass; b=ZxYJi4gx5kdZMCe8IBiFmkL460oxWJJvjImgnU3CFBwz6y+1xZwjThNYNSS4YxNO5T4Kt5 qVQDd1neXKH3ulYKGk/U2V3d/tMKs+zG5INQATDnWSOT9tIJWcvw21FxuAS9moMjii8t/z AUF1pnSON+LdfMiwHGH0uvmaVLhQ+Z0= Received: from pps.filterd (m0246627.ppops.net [127.0.0.1]) by mx0b-00069f02.pphosted.com (8.17.1.19/8.17.1.19) with ESMTP id 336FC6Aq004169; Thu, 6 Apr 2023 21:32:40 GMT DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=oracle.com; h=date : from : to : cc : subject : message-id : references : content-type : in-reply-to : mime-version; s=corp-2022-7-12; bh=HDSXSayFepoXOS6vggL7BR2L4CmDkkTvc4TLVlMRtNM=; b=eJTvOCzY+GyGdZ39+1qIB+Lnh1T9Ky65A38h6xDzygqvWtwbMjdC1IONBwXGvnIOGL08 7k1VNEEXL0VIRcQkfhRKPIjLP4qHD4UyJ33nYqc4gAh1gUpH5EJm0pv100khIxpOBi8x Y0PwSUgwQ5vpm/GE9Wer14cr3RqaQAz28aUloXhvamTkYNwKLHBgMdOvsBS1AYUb0IcF qaCQ511ZrnQeGmBeru53F+TayKgC0s2YR+PJ4uGYNP8J9xjUj3SuG8PF852eBg+EFBTD 5tFgQ0xvpjafuNef26FA6uUqYo0e6CeJde52mo5YQG9dsh0BgWWXBAD/4CXrPWnx2pQK og== Received: from phxpaimrmta03.imrmtpd1.prodappphxaev1.oraclevcn.com (phxpaimrmta03.appoci.oracle.com [138.1.37.129]) by mx0b-00069f02.pphosted.com (PPS) with ESMTPS id 3ppb71v1ae-1 (version=TLSv1.2 cipher=ECDHE-RSA-AES256-GCM-SHA384 bits=256 verify=OK); Thu, 06 Apr 2023 21:32:40 +0000 Received: from pps.filterd (phxpaimrmta03.imrmtpd1.prodappphxaev1.oraclevcn.com [127.0.0.1]) by phxpaimrmta03.imrmtpd1.prodappphxaev1.oraclevcn.com (8.17.1.19/8.17.1.19) with ESMTP id 336Kp6S1008979; Thu, 6 Apr 2023 21:32:39 GMT Received: from nam12-mw2-obe.outbound.protection.outlook.com (mail-mw2nam12lp2044.outbound.protection.outlook.com [104.47.66.44]) by phxpaimrmta03.imrmtpd1.prodappphxaev1.oraclevcn.com (PPS) with ESMTPS id 3ppt3kmhu7-1 (version=TLSv1.2 cipher=ECDHE-RSA-AES256-GCM-SHA384 bits=256 verify=OK); Thu, 06 Apr 2023 21:32:39 +0000 ARC-Seal: i=1; a=rsa-sha256; s=arcselector9901; d=microsoft.com; cv=none; b=H9kTl2JbkCCtG7GJL4bG0XbO/BpYmPDO/AErXQIAEOuH202agQBSdMDp+Sp+Dk6d5U1w6c91Q0lnOLRAATTHELd2/Mf3Hj4DYPavVk4PvSqBQ5AzHyyYxe2n/d56f4aTA3IxsFfk53nsBfUuNt4WI7iQvhE3DkF9ehO+EsjUiwXBBRdE/QphmroqPtlcwHApWwABS94tfwjc5Vd+0kh2SL9G3M5XXAxIbxLKrXCIVC6/R4t1xh2wcLgTaWCd2fWNhN/JZoJHC6kPnv7hUEdhowHxQ103HRkHY+dbB2RZM2l9ZJMrUJyKoFDHj0equ6A6y+xYrjM0f84qYtVmBaupSw== ARC-Message-Signature: i=1; a=rsa-sha256; c=relaxed/relaxed; d=microsoft.com; s=arcselector9901; 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=HDSXSayFepoXOS6vggL7BR2L4CmDkkTvc4TLVlMRtNM=; b=jNEQXOx4CQRguWmVoZS+XR2XBCl3NT9H7Zfe3oN5Cu1DZtitW9OMG79fc+YxRCOWdq167ByWwHClh5UeBCCnEdv2w9/WWeYvRbCI6moA7hdvHpjXTk2bYScQOtQSmJQFbR1kRr7qenfvxsaFiDbi9J2nqHGuK+vJEerwUjeEjweqaXaZCT+5EqIN++3BCGj5FkqCZvfyJlEJuEKc4v2vNiAoAHJ203w9OItZd+f7bW5FCULyFq3TYoaxgs1r0Lu8K173S/b3J/wzRoTbnpsCdKn9g7pys9EEjRgxfrX2XnwmsLgcEVR4mjzRJZQC2dTcO6ogXqQgALm5TBBg5XZnWg== 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=HDSXSayFepoXOS6vggL7BR2L4CmDkkTvc4TLVlMRtNM=; b=RD2hJxMG6G7NYARupJUiduJYWWBSn97DyVToSifUWtZfmu19BAn6kWz7ZyKHrhFvozdg6PM5/vWaRxwg+gJEXSXbUsFDL97zODU63U8JD/wHYPTrdlwbhPU/d6GuGtkI0qB4x6s3AosiTVWDEfWz2ZIdwl8IttsBEqPsDUpwLmg= Received: from BY5PR10MB4196.namprd10.prod.outlook.com (2603:10b6:a03:20d::23) by BLAPR10MB5220.namprd10.prod.outlook.com (2603:10b6:208:324::16) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id 15.20.6277.30; Thu, 6 Apr 2023 21:32:37 +0000 Received: from BY5PR10MB4196.namprd10.prod.outlook.com ([fe80::ffb:de39:b76b:52eb]) by BY5PR10MB4196.namprd10.prod.outlook.com ([fe80::ffb:de39:b76b:52eb%3]) with mapi id 15.20.6277.030; Thu, 6 Apr 2023 21:32:36 +0000 Date: Thu, 6 Apr 2023 14:32:33 -0700 From: Mike Kravetz To: Peng Zhang Cc: linux-mm@kvack.org, linux-kernel@vger.kernel.org, akpm@linux-foundation.org, willy@infradead.org, sidhartha.kumar@oracle.com, vishal.moola@gmail.com, muchun.song@linux.dev, wangkefeng.wang@huawei.com, sunnanyong@huawei.com Subject: Re: [PATCH v5 2/6] userfaultfd: use kmap_local_page() in copy_huge_page_from_user() Message-ID: <20230406213233.GC14244@monkey> References: <20230331093937.945725-1-zhangpeng362@huawei.com> <20230331093937.945725-3-zhangpeng362@huawei.com> Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20230331093937.945725-3-zhangpeng362@huawei.com> X-ClientProxiedBy: MW4PR04CA0118.namprd04.prod.outlook.com (2603:10b6:303:83::33) To BY5PR10MB4196.namprd10.prod.outlook.com (2603:10b6:a03:20d::23) MIME-Version: 1.0 X-MS-PublicTrafficType: Email X-MS-TrafficTypeDiagnostic: BY5PR10MB4196:EE_|BLAPR10MB5220:EE_ X-MS-Office365-Filtering-Correlation-Id: 0e756c38-2ff8-4511-a600-08db36e670a3 X-MS-Exchange-SenderADCheck: 1 X-MS-Exchange-AntiSpam-Relay: 0 X-Microsoft-Antispam: BCL:0; X-Microsoft-Antispam-Message-Info: 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 X-Forefront-Antispam-Report: CIP:255.255.255.255;CTRY:;LANG:en;SCL:1;SRV:;IPV:NLI;SFV:NSPM;H:BY5PR10MB4196.namprd10.prod.outlook.com;PTR:;CAT:NONE;SFS:(13230028)(7916004)(376002)(366004)(136003)(346002)(396003)(39860400002)(451199021)(83380400001)(33656002)(86362001)(33716001)(38100700002)(478600001)(6486002)(316002)(966005)(41300700001)(8936002)(5660300002)(44832011)(8676002)(4744005)(4326008)(6916009)(2906002)(66556008)(66946007)(66476007)(186003)(1076003)(26005)(6666004)(6506007)(53546011)(6512007)(9686003)(14583001);DIR:OUT;SFP:1101; X-MS-Exchange-AntiSpam-MessageData-ChunkCount: 1 X-MS-Exchange-AntiSpam-MessageData-0: =?us-ascii?Q?WtRmT8YGJXUx+YW+2Jw2DgO8VRzSPAH0IyqqpAXJYslr8g4gFwSSySF9feoG?= =?us-ascii?Q?5G/WBH3M5LwXrn9eb5syuAAGm6cnlyDahiqH6+VGYNUdyIZwrV2CX4/Oyddl?= =?us-ascii?Q?HtDWyrCjzg3Zqj4E1EMV8he15dxwy1YX000W/LqcDit59R2dLkOs0CD/OpCx?= =?us-ascii?Q?KTMpanC4s35MxR4ziNkWaSw3b+3L+iN0SYewsVUtsrfyS9YBwZvcK0ZNtms8?= =?us-ascii?Q?JO7lihu/4StcBNVaAe2qWwRNv8ac+tC7JlCNYcYge/uei+oTGiT9Drw7OUbB?= =?us-ascii?Q?ghDEqXX6BqYmnJMJnjF9Of/yCCxtGpbszF0jb5xmv/LZ3KCHFbQnEju4nr7X?= =?us-ascii?Q?o6FVIN8NVG2vHkCOOpu/fmH1mXvUfq8L8Qa6yGMbX22hkyE9+ZsJwWq5dbTT?= =?us-ascii?Q?2ANGFmBjhMQyzPjbnAZdh3iVsg+C1EAbfBuXhZKtNf43JJDZJlsl//C5q6Xr?= =?us-ascii?Q?ZOr4pMNCfa+SU2/lB26PhRy+dya7d7kQZCYUYSSlSonvWsykOvN377Vrp4q8?= =?us-ascii?Q?h3H50qBVg/LBdDRIG940vRNzncV1gKtYBVzdDTfL493DMuo1Z++axbxSM9QM?= =?us-ascii?Q?7BjUiB62uDsoRtzjqNwhVI1tuYv7R7W10J2eIWV8oADNRF6vB1kZcM6P0GVj?= =?us-ascii?Q?JUQsQ333xi4qOsyp17Qk5MelpUQnFXEydQpYrhtmFgeZI7yrYZwNmj9m7jnQ?= =?us-ascii?Q?Am/+wprInc4G6OI0GR6HrK+3IVyuLcSPsRYt8XEkzsytZ6vi4l15G76TLhfm?= =?us-ascii?Q?DZepHPRw5d8tMFP4uDMFzkwN9oUL1G9fx4Kst6z6bFizDMz+LYtWZSVJxU7W?= =?us-ascii?Q?W12Rks8SIhKR6Ni4IZc+Pu0+mqoKC1A6OCCVWdeLyZC+xPUpZt3kqoc917dD?= =?us-ascii?Q?q2ZzbS3JEuoPWnYZsrFAB9kOcKSXQlR+hYbeRczZ//H/E3muYPIGDW9BiBmK?= =?us-ascii?Q?hZdIvI325BEbPghE/7h0OUT6H2Prl5Dys8C5qDvkRZfGJOUlCypcvnnuLEEp?= =?us-ascii?Q?j0xhXuSjaZ4Gt2BhCXEWdLZwByaYiKwNcuV7vrAksa9OeOLVQrZt9Iv2SOge?= =?us-ascii?Q?U3YAOSgBIWnRXPr/Sp06kbjFmlS2Le6kTu6HUdzTkc39CD3N6HPvrCFSMI52?= =?us-ascii?Q?3KhTZG5N6jUV9cdF/vQyluEHGnZxO/LJa25y9vCdlIG897UZo8c7ob5xCVl3?= =?us-ascii?Q?MRHjZ4kjfjy6waHA0tSLg42Z4mkeVJe5fbEp++2fzdWvYaKvKsWNZyo3d4Va?= =?us-ascii?Q?+GVRtEleauI2v90CILN5bTadJyJdDSuTK9U+b5OB1ag/NpwJKhDP6MmAz+4I?= =?us-ascii?Q?gNNYLt3ubCMp4vLqXaygQxDydPBcX6n8VUrx2gq45cK6/7v+UU5WDT2uvOKM?= =?us-ascii?Q?sjSce08djA69NxqD7hzDMzl0kdUAX6LarnrqGJW7jLD92BNZu+VvZoSF+uhf?= =?us-ascii?Q?YJtXv06zg4gvhjbCNrYx1tuPWieBWruV0MFk59hJg/2D3wxu9R9dwRmUWk3G?= =?us-ascii?Q?hIwrMxM23+bxmxudUq5vn3//V2oXYOaQqYnZIPi5MEhy9QzCyLkVkqSAp6FE?= =?us-ascii?Q?jKeXPn4D5p3v1lXh3npdIi0xgtouhpu0DenjM26PhLeJ8thglL/+o2MrozIt?= =?us-ascii?Q?FA=3D=3D?= X-MS-Exchange-AntiSpam-ExternalHop-MessageData-ChunkCount: 1 X-MS-Exchange-AntiSpam-ExternalHop-MessageData-0: =?us-ascii?Q?ECXZil5UpgP3pJDtiMQEuWTAaK0yN/Zk8zLc4bhMj6kpG2/XloxivrqoCPyR?= =?us-ascii?Q?esL/hlR69JaiUdsqPcJNype+6M4eWZGndOatIjB2e8j5DW0SSovXKXH1seqC?= =?us-ascii?Q?9ZpnVL3OI2Y+4RehcvU+X2szeNenWYQc6ujJK8gskvvOmkbb8dRr4BXXNaWT?= =?us-ascii?Q?4eqTpbrsp8MHOtp+XeVXL6CRu9/lBQQhn4u4nM5jnOCEQpahLS4x346bRKnZ?= =?us-ascii?Q?fmqwx/y3G3WzVbMvq7ieLyCJ1h6AJaF61jhBaj02hu4bAyYM8hrFIxPe52ID?= =?us-ascii?Q?TASpXempuBUO/Y6+9tgwst59zJK2lvRZn+Kc61BFVJ59x2mMXX9ROPTkLTds?= =?us-ascii?Q?2izOH+158mQj/Yu/Jri1tX8f/WZ+f+Y5goBhgyDGyrGEuyWe2Nzk/tAAZE6L?= =?us-ascii?Q?i7mZ+PxeCrv+p1M4MVpKItfXsrvJnMlHB+A4itkYWcypHegAUk4fWxsazkFb?= =?us-ascii?Q?8bZulfLgakJwnCKv+2nuzsNwR4sJoEF44DGkcAC/FWN+K0qdd5HOu9lKN0fI?= =?us-ascii?Q?ljCQx3IdMp9gvF1XB9PBkOAVBPEW9kVIAWcz+kjtHw2R72Wl00ioMt6Ke02d?= =?us-ascii?Q?mVUN555E75fae8O4IS4dY1kQ+Fd5W9jQv4JaHwIWnmcbzeSzcw6QXauUEIp7?= =?us-ascii?Q?2pfpIYyd9SOZeoNv2kHkwSgu/Ftps+t0nvDn7hUAczwmh/fWuGHHhxUcZpKO?= =?us-ascii?Q?oOLrCJfsgt74hAopNkkb3N7nfrUOJzufE95TjGkTi1DFztp796ewRcxL19rc?= =?us-ascii?Q?XkRQWB715S2VwWPn6X8GNrMQOjMxKeNfO7QX6h6uzr3tpAIwf0Fc299fN7lk?= =?us-ascii?Q?spfhQ3cX6A+30JLauwXyPhjo9BasrhN+A+p0ptGJ8bnbhJEewWYtyuZLojkU?= =?us-ascii?Q?vgQk4M+6IC5cQzHOQdID2QXm/zoudvQmpSw9ugcv7n7LK6jmTq5W68mIAE42?= =?us-ascii?Q?9iV8cBaTSEZXVZy/MjNiXA=3D=3D?= X-OriginatorOrg: oracle.com X-MS-Exchange-CrossTenant-Network-Message-Id: 0e756c38-2ff8-4511-a600-08db36e670a3 X-MS-Exchange-CrossTenant-AuthSource: BY5PR10MB4196.namprd10.prod.outlook.com X-MS-Exchange-CrossTenant-AuthAs: Internal X-MS-Exchange-CrossTenant-OriginalArrivalTime: 06 Apr 2023 21:32:36.5138 (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: 7xbyZEbCeJTHG4Ku5sLraIrIdTwOJNlEbKd+shwlg3agG+bZfUaAGqcCmtK/xDZkNAj7tfd7/X4Ai2uX4efCAA== X-MS-Exchange-Transport-CrossTenantHeadersStamped: BLAPR10MB5220 X-Proofpoint-Virus-Version: vendor=baseguard engine=ICAP:2.0.254,Aquarius:18.0.942,Hydra:6.0.573,FMLib:17.11.170.22 definitions=2023-04-06_12,2023-04-06_03,2023-02-09_01 X-Proofpoint-Spam-Details: rule=notspam policy=default score=0 mlxlogscore=999 mlxscore=0 adultscore=0 suspectscore=0 spamscore=0 malwarescore=0 phishscore=0 bulkscore=0 classifier=spam adjust=0 reason=mlx scancount=1 engine=8.12.0-2303200000 definitions=main-2304060190 X-Proofpoint-ORIG-GUID: FpGMA8u83IwNb2zP2FHxbKKb-oQn6HdK X-Proofpoint-GUID: FpGMA8u83IwNb2zP2FHxbKKb-oQn6HdK X-Rspam-User: X-Rspamd-Server: rspam02 X-Rspamd-Queue-Id: 6DF9680026 X-Stat-Signature: mx5ncqf1zn1qfrin3u934qc95mjrtc7e X-HE-Tag: 1680816777-515890 X-HE-Meta: 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 SOL1DEW9 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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: On 03/31/23 17:39, Peng Zhang wrote: > From: ZhangPeng > > kmap() and kmap_atomic() are being deprecated in favor of > kmap_local_page() which is appropriate for any thread local context.[1] > > Let's replace the kmap() and kmap_atomic() with kmap_local_page() in > copy_huge_page_from_user(). When allow_pagefault is false, disable page > faults to prevent potential deadlock.[2] > > [1] https://lore.kernel.org/all/20220813220034.806698-1-ira.weiny@intel.com/ > [2] https://lkml.kernel.org/r/20221025220136.2366143-1-ira.weiny@intel.com > > Signed-off-by: ZhangPeng > --- > mm/memory.c | 14 ++++++-------- > 1 file changed, 6 insertions(+), 8 deletions(-) Thanks, Reviewed-by: Mike Kravetz -- Mike Kravetz