From patchwork Tue Jan 17 02:34:21 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: "Liam R. Howlett" X-Patchwork-Id: 13104104 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 AB97AC54EBE for ; Tue, 17 Jan 2023 02:35:22 +0000 (UTC) Received: by kanga.kvack.org (Postfix) id AD10D6B00AC; Mon, 16 Jan 2023 21:35:11 -0500 (EST) Received: by kanga.kvack.org (Postfix, from userid 40) id A0A5F6B00AE; Mon, 16 Jan 2023 21:35:11 -0500 (EST) X-Delivered-To: int-list-linux-mm@kvack.org Received: by kanga.kvack.org (Postfix, from userid 63042) id 6897C6B00B0; Mon, 16 Jan 2023 21:35:11 -0500 (EST) X-Delivered-To: linux-mm@kvack.org Received: from relay.hostedemail.com (smtprelay0017.hostedemail.com [216.40.44.17]) by kanga.kvack.org (Postfix) with ESMTP id 1D6266B00AA for ; Mon, 16 Jan 2023 21:35:11 -0500 (EST) Received: from smtpin11.hostedemail.com (a10.router.float.18 [10.200.18.1]) by unirelay03.hostedemail.com (Postfix) with ESMTP id EC12EA0AD3 for ; Tue, 17 Jan 2023 02:35:10 +0000 (UTC) X-FDA: 80362723980.11.A68104C Received: from mx0a-00069f02.pphosted.com (mx0a-00069f02.pphosted.com [205.220.165.32]) by imf20.hostedemail.com (Postfix) with ESMTP id 87CA31C000A for ; Tue, 17 Jan 2023 02:35:07 +0000 (UTC) Authentication-Results: imf20.hostedemail.com; dkim=pass header.d=oracle.com header.s=corp-2022-7-12 header.b=pnatHnwa; dkim=pass header.d=oracle.onmicrosoft.com header.s=selector2-oracle-onmicrosoft-com header.b=ZCzTNAIz; spf=pass (imf20.hostedemail.com: domain of liam.howlett@oracle.com designates 205.220.165.32 as permitted sender) smtp.mailfrom=liam.howlett@oracle.com; dmarc=pass (policy=none) header.from=oracle.com; arc=pass ("microsoft.com:s=arcselector9901:i=1") ARC-Seal: i=2; s=arc-20220608; d=hostedemail.com; t=1673922907; a=rsa-sha256; cv=pass; b=ql6UPGWD8koiZak/CC8S+oY1NYpJENGX3b2XaVbtjJXBTDtgKxNXAYR2zUmwZuA7nrkv4y LBecFAK08TveEyPea8INyUQMbI6noELnqd6nC/aIffQT2dSHJOD6nvClnYzDmZSo9woip1 lJVuDKwZuKCaNmJF0TJU70DCCfImIsQ= ARC-Authentication-Results: i=2; imf20.hostedemail.com; dkim=pass header.d=oracle.com header.s=corp-2022-7-12 header.b=pnatHnwa; dkim=pass header.d=oracle.onmicrosoft.com header.s=selector2-oracle-onmicrosoft-com header.b=ZCzTNAIz; spf=pass (imf20.hostedemail.com: domain of liam.howlett@oracle.com designates 205.220.165.32 as permitted sender) smtp.mailfrom=liam.howlett@oracle.com; dmarc=pass (policy=none) header.from=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=1673922907; 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:content-transfer-encoding: in-reply-to:in-reply-to:references:references:dkim-signature; bh=pJ/7ZC+ntmfdKF++qbytFnfm14yjKCOCTjz8I9jpD0k=; b=trNrnHnE7HYQ/2QKikTUztkz0WiJWvu9WcJoPLED0IB+N+0NPKjpLLG8ZUSTyfR2Bb+Qzo 8uW7j/kGMq2eQ3LvOP2G2Fr806wbYwbTO/mMHckpiHrG70R4oA7KiesPptQxtdZxZbEfCI ROYJniv7rn/F7pg231HO6M8ce3uaDFY= Received: from pps.filterd (m0246629.ppops.net [127.0.0.1]) by mx0b-00069f02.pphosted.com (8.17.1.19/8.17.1.19) with ESMTP id 30H09ZsE005646; Tue, 17 Jan 2023 02:35:06 GMT DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=oracle.com; h=from : to : cc : subject : date : message-id : references : in-reply-to : content-type : content-transfer-encoding : mime-version; s=corp-2022-7-12; bh=pJ/7ZC+ntmfdKF++qbytFnfm14yjKCOCTjz8I9jpD0k=; b=pnatHnwak/ocu9rJ8w3MILxfpTH/Io/KHrgzIds0JmnAi12m/O3l7BKqH7Ml3CB15Bhq PGQ2bvb1VatYAJrbqLxnQq5nwCRq0LbHwwMQvOsU1dQWcdGRiAXwvg7c0fqTZnUF4Ifr kW66lDUE0X9Kih09QRv70GQuUChMOAkDeDcA2iF64oJ63MDDitg706ASNsrnu6zmWPBS pHDNwt8kVu4gtIQkezWbt6CZzk7l0THNUqb9+vxNFN94XJreD5otZk0r/zo04yduN6Hh r6k4dd0ZYTesIPg2P4Mk882FhRvT+Bk/i3gT6WBSE3dKyOXUarXwI/pna0Dg4cVc75tp lw== Received: from iadpaimrmta02.imrmtpd1.prodappiadaev1.oraclevcn.com (iadpaimrmta02.appoci.oracle.com [147.154.18.20]) by mx0b-00069f02.pphosted.com (PPS) with ESMTPS id 3n40mdb5ew-1 (version=TLSv1.2 cipher=ECDHE-RSA-AES256-GCM-SHA384 bits=256 verify=OK); Tue, 17 Jan 2023 02:35:06 +0000 Received: from pps.filterd (iadpaimrmta02.imrmtpd1.prodappiadaev1.oraclevcn.com [127.0.0.1]) by iadpaimrmta02.imrmtpd1.prodappiadaev1.oraclevcn.com (8.17.1.5/8.17.1.5) with ESMTP id 30GNCpCW004918; Tue, 17 Jan 2023 02:35:00 GMT Received: from nam12-mw2-obe.outbound.protection.outlook.com (mail-mw2nam12lp2041.outbound.protection.outlook.com [104.47.66.41]) by iadpaimrmta02.imrmtpd1.prodappiadaev1.oraclevcn.com (PPS) with ESMTPS id 3n4qyy10ss-9 (version=TLSv1.2 cipher=ECDHE-RSA-AES256-GCM-SHA384 bits=256 verify=OK); Tue, 17 Jan 2023 02:35:00 +0000 ARC-Seal: i=1; a=rsa-sha256; s=arcselector9901; d=microsoft.com; cv=none; b=WrqArGU//fnl/6OH6OPwctsJYNbeYHHi57X2JPp3GoaozKgYtY4q3fVwdH1b/4X6pJPZFBOuWlSN7MwdmfNAvZJ8JT32DibkOtZIOBk9YaeTmG/bOnyBMP+H3sYoH0n8Ns6IMzNXxw3+OYUQsOdVRFC26q7kCCLSbbj2dTosY66btYcbAdX3rqF6LfvOH5G/g91MLB9GmzyLjSvBH7Hiowf6i5xL5vu9G7geRwiBG1xbZEnXdTeafLyWo39xX59hvpQJicG3VhVDLrk95KkcXzD7xCloiIcSdM/I/spsK3XkUQio3FTC9Ggm1aEajrlu5ZzdssYV/GSgiA1lnEvUrw== 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=pJ/7ZC+ntmfdKF++qbytFnfm14yjKCOCTjz8I9jpD0k=; b=bDgageNsmCJtpl69Mc+Qmn00sW8E6phnttop+kE0tGBVZeB2vjLKz7x2XcQgRBQePNRc2dX9jHUAfuh/2qn6tzexg2xseQlFo9177mvna4FcXSK4Z0jGhy2eiCZoY6mx6gV5GKcTLirERMr9Qmdt8mmrSXwVt6pQpi4V15sBYeBX//E30CQ62c2ro98QTkeyxCgmtzlD0ok9OBz09SfJZyQ2KKK2jp37EH8pO15gevo09hMtKJUfo15PMQnoCoKZ+kTeRpaXgLYvySudJiLIN2SHN+ou2toyJMLwxf3A9jtOrGNuxnSpoZt2ncPuSLwi2UJo2vyjpbf59AdQL0wWEA== 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=pJ/7ZC+ntmfdKF++qbytFnfm14yjKCOCTjz8I9jpD0k=; b=ZCzTNAIz1ebl8jiLP1hdEbiCaUwHkRJKcNAMov4JnZTJ7fn9aDHUnjiO0jGkTwB6Jwku1H1zN9EHbaDbQKeTwMre1mv1FlIW85b0k8fALyssPZElXDAlR5JIIiRYrhRYkd+u2b7NCCqOjWN6/JZVhLFdaC2tnH/2R5y0C0AJs4A= Received: from SN6PR10MB3022.namprd10.prod.outlook.com (2603:10b6:805:d8::25) by CO6PR10MB5538.namprd10.prod.outlook.com (2603:10b6:303:135::11) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id 15.20.6002.9; Tue, 17 Jan 2023 02:34:58 +0000 Received: from SN6PR10MB3022.namprd10.prod.outlook.com ([fe80::a02:2ac8:ee3e:682]) by SN6PR10MB3022.namprd10.prod.outlook.com ([fe80::a02:2ac8:ee3e:682%4]) with mapi id 15.20.6002.012; Tue, 17 Jan 2023 02:34:58 +0000 From: Liam Howlett To: "linux-mm@kvack.org" , "linux-kernel@vger.kernel.org" , Andrew Morton , "maple-tree@lists.infradead.org" CC: Liam Howlett , Liam Howlett Subject: [PATCH v3 38/48] mm: Change munmap splitting order and move_vma() Thread-Topic: [PATCH v3 38/48] mm: Change munmap splitting order and move_vma() Thread-Index: AQHZKhw010/t6IOVzkK9qaSgGgYYIQ== Date: Tue, 17 Jan 2023 02:34:21 +0000 Message-ID: <20230117023335.1690727-39-Liam.Howlett@oracle.com> References: <20230117023335.1690727-1-Liam.Howlett@oracle.com> In-Reply-To: <20230117023335.1690727-1-Liam.Howlett@oracle.com> Accept-Language: en-US Content-Language: en-US X-MS-Has-Attach: X-MS-TNEF-Correlator: x-mailer: git-send-email 2.35.1 x-ms-publictraffictype: Email x-ms-traffictypediagnostic: SN6PR10MB3022:EE_|CO6PR10MB5538:EE_ x-ms-office365-filtering-correlation-id: f70e9818-ceec-4ec4-33ad-08daf8336d52 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:SN6PR10MB3022.namprd10.prod.outlook.com;PTR:;CAT:NONE;SFS:(13230022)(366004)(346002)(396003)(136003)(376002)(39860400002)(451199015)(36756003)(91956017)(86362001)(8676002)(6512007)(64756008)(4326008)(186003)(76116006)(66946007)(66556008)(41300700001)(2616005)(66446008)(26005)(66476007)(316002)(71200400001)(478600001)(6666004)(38070700005)(6506007)(54906003)(110136005)(107886003)(6486002)(44832011)(122000001)(38100700002)(2906002)(5660300002)(83380400001)(8936002)(1076003);DIR:OUT;SFP:1101; x-ms-exchange-antispam-messagedata-chunkcount: 1 x-ms-exchange-antispam-messagedata-0: =?iso-8859-1?q?Vd1gBlzoFWI+Z44eQeT4qqG?= =?iso-8859-1?q?JN7x5Il3A60HRCH01bjK2sdzGcCmYFsuZpwGYvfRGlgRUE/jD6+xMgDazrFJ?= =?iso-8859-1?q?VquO67bDFR1T5acVUtV/DB9NxpGEPWJ+6TlJfAGp4xHT9nMehW2GbLb39SkL?= =?iso-8859-1?q?/s9L6iq5gdklbTSLu8caTUfnJMdfno1ECk55qvTZyA74qKrGEvpidC8Bwwqr?= =?iso-8859-1?q?c3CDXw1AUzuJcsj6k8p/8zlHjucIHGxtLwcNSYxht4xnjw3awjf/Uuz1f1cQ?= =?iso-8859-1?q?HktGLZIA4qMd0kP276QFMSaEGsq3ap35vrpDl68+L9fFd9PkfVAz5dV6vDs7?= =?iso-8859-1?q?ijq9Z54kn2pPtyfRP3CssId0vx9lJIR0Mkx7oogCvKGfbpCO9KUo86+4tiXN?= =?iso-8859-1?q?wWjpoBUCdjUpSccepBTUdCPHsfayKthomoN4tGyzR9aNwNlbw8n2M9QI7IdA?= =?iso-8859-1?q?FhX4KWp5uVEjlqUwEmgdNKTi+WePB9TMZkmH+xUY6WVWeM9IdiDpEB605yXB?= =?iso-8859-1?q?iCf7BtOT4YFNyeX2uCiXEo9MHkNR1Kt5bUhhg84NhnX9D22cru6oa4355uF6?= =?iso-8859-1?q?8vpvGfAbVSDP1rwRtwMrZuBBjFP2Iew2n/dx9o+cI/Vtb1TvFlAz9cPiF47A?= =?iso-8859-1?q?0p2DF/IVkbHP/ccgFUkvpcLglWRBhZgTEw6Xws2uiPOnOL4S7J3WaZ5KJEnD?= =?iso-8859-1?q?lfPr2POQDP24Z6s6DxokW3q5yduF6/6CH7gOeB1Py9YSGk2qmdsRIDzCcq3J?= =?iso-8859-1?q?eN7193LK22rKevPWTA4PUm069mMP6Rw2IfaT1QLeg+11pzKZSLijyXVyVMKz?= =?iso-8859-1?q?RDIdk3LobqbE2kpx3s5y8qbzpB1vUHrdshYZ1yEQP3OA5dj9EypuH2Eu0mkC?= =?iso-8859-1?q?tHqydDcTw3rZyabA9fV3TrmqIT1mXfTU73kxmusmWvH2bJCSjalppoz+gFxc?= =?iso-8859-1?q?l1nAvzLHPa21nYrXbc2chvaRMWWlldaRmTmRGmnDQU9HW6peWfsDzuYHQpsG?= =?iso-8859-1?q?wE4Qje8bLI6fU/zKYhLUY5pYSWA0+I8IvTZe90JrzsXMEy9DMz+JMsEJ8Bau?= =?iso-8859-1?q?Gi0OIIiOePeKsgq9XWmPqizIuc8+gvNvr7HukKKVZryBDk9lUFl9gvOZA+Pk?= =?iso-8859-1?q?3bViRQfDVMBY9p3zTLyIbSnMitvdZppjwTt8ABThIhxGzwz/yhvJfSxwyNly?= =?iso-8859-1?q?JxZ91EEc86VX+lRLyL0J1FJ6Xz84yrh4RyS//JBXV3zoMqRCTgU0F64KvfbI?= =?iso-8859-1?q?iXNnzoc2ixD3zm5sUgmbZXorTp3vj4zJu1hWONwNiVWzl5kGK5cIsw9mVuRz?= =?iso-8859-1?q?Qoyi/wgC0hrAmTba3pMrg7IWuPpyikhdK00z1pI9qwU9am8SWAXbgw3uJ0YD?= =?iso-8859-1?q?M0Al0HOWoq58MURnxQchBfeqTWQJJ36WJ/oCkqx0e0ho/FXel799i3umTMQc?= =?iso-8859-1?q?aq5cOz96ktBh/t6leDDe8wP5ycongD4L9zBWscufY5YEkDy0z8OfAyfbPLTQ?= =?iso-8859-1?q?VKfpIWFNd1X21FCLjcy9kmJfXEPAQc1lzUHadr6n39/l7GBJ7HrCRjKFEXn7?= =?iso-8859-1?q?4TG6kZ8grDFYmXzaLUF9lJOYxIC1U3BxRf18Zt3pFcPhnQyCOHPAdsSjRc1f?= =?iso-8859-1?q?OcGYjJT/ivXxZTbZ7QxcEautg3UcsauhNrupCyQ=3D=3D?= MIME-Version: 1.0 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-AuthAs: Internal X-MS-Exchange-CrossTenant-AuthSource: SN6PR10MB3022.namprd10.prod.outlook.com X-MS-Exchange-CrossTenant-Network-Message-Id: f70e9818-ceec-4ec4-33ad-08daf8336d52 X-MS-Exchange-CrossTenant-originalarrivaltime: 17 Jan 2023 02:34:21.8589 (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: LXgVqPXP3K2TKSljjUJV1I1hecFqkXi9XblDz2gFlEEFv5Ks3MIETG3xiDq2mCneMGU5NxWi8WkELBBNlCNztw== X-MS-Exchange-Transport-CrossTenantHeadersStamped: CO6PR10MB5538 X-Proofpoint-Virus-Version: vendor=baseguard engine=ICAP:2.0.219,Aquarius:18.0.923,Hydra:6.0.562,FMLib:17.11.122.1 definitions=2023-01-16_18,2023-01-13_02,2022-06-22_01 X-Proofpoint-Spam-Details: rule=notspam policy=default score=0 adultscore=0 malwarescore=0 phishscore=0 suspectscore=0 spamscore=0 bulkscore=0 mlxlogscore=999 mlxscore=0 classifier=spam adjust=0 reason=mlx scancount=1 engine=8.12.0-2212070000 definitions=main-2301170017 X-Proofpoint-ORIG-GUID: 8sBs_7mJaU3KoUu7LHY8UI3VelJ1mHmQ X-Proofpoint-GUID: 8sBs_7mJaU3KoUu7LHY8UI3VelJ1mHmQ X-Rspam-User: X-Rspamd-Queue-Id: 87CA31C000A X-Rspamd-Server: rspam01 X-Stat-Signature: h31rbd1czikw18fh6fi5euowh3nahk5b X-HE-Tag: 1673922907-970850 X-HE-Meta: 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 c+mIqBcG Z/a+YWe5ghUYtlIdG8ouAtHqqA978Wv88nXtgCCGg3qtNVzg3u4hNLjy/MO/LkaF/w1kj/VQ0Ju+eTiC9ImgSCUCX6zJq0jlaDTNarjnZPyh6AwfWxZ8El01IRSbRLa7hPqwjvR5494G+jBOsQsDuq1o4AA== 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: From: "Liam R. Howlett" Splitting can be more efficient when the order is not of concern. Change do_vmi_align_munmap() to reduce walking of the tree during split operations. move_vma() must also be altered to remove the dependency of keeping the original VMA as the active part of the split. Transition to using vma iterator to look up the prev and/or next vma after munmap. Signed-off-by: Liam R. Howlett --- mm/mmap.c | 18 ++---------------- mm/mremap.c | 27 ++++++++++++++++----------- 2 files changed, 18 insertions(+), 27 deletions(-) diff --git a/mm/mmap.c b/mm/mmap.c index 01988db478e1..434020155f8a 100644 --- a/mm/mmap.c +++ b/mm/mmap.c @@ -2328,21 +2328,9 @@ do_vmi_align_munmap(struct vma_iterator *vmi, struct vm_area_struct *vma, for_each_vma_range(*vmi, next, end) { /* Does it split the end? */ if (next->vm_end > end) { - struct vm_area_struct *split; - - error = __split_vma(vmi, next, end, 1); + error = __split_vma(vmi, next, end, 0); if (error) goto end_split_failed; - - split = vma_prev(vmi); - error = munmap_sidetree(split, &mas_detach); - if (error) - goto munmap_sidetree_failed; - - count++; - if (vma == next) - vma = split; - break; } error = munmap_sidetree(next, &mas_detach); if (error) @@ -2355,9 +2343,7 @@ do_vmi_align_munmap(struct vma_iterator *vmi, struct vm_area_struct *vma, #endif } - if (!next) - next = vma_next(vmi); - + next = vma_next(vmi); if (unlikely(uf)) { /* * If userfaultfd_unmap_prep returns an error the vmas diff --git a/mm/mremap.c b/mm/mremap.c index 00845aec5441..98f27d466265 100644 --- a/mm/mremap.c +++ b/mm/mremap.c @@ -580,11 +580,12 @@ static unsigned long move_vma(struct vm_area_struct *vma, unsigned long vm_flags = vma->vm_flags; unsigned long new_pgoff; unsigned long moved_len; - unsigned long excess = 0; + unsigned long account_start = 0; + unsigned long account_end = 0; unsigned long hiwater_vm; - int split = 0; int err = 0; bool need_rmap_locks; + VMA_ITERATOR(vmi, mm, old_addr); /* * We'd prefer to avoid failure later on in do_munmap: @@ -662,10 +663,10 @@ static unsigned long move_vma(struct vm_area_struct *vma, /* Conceal VM_ACCOUNT so old reservation is not undone */ if (vm_flags & VM_ACCOUNT && !(flags & MREMAP_DONTUNMAP)) { vma->vm_flags &= ~VM_ACCOUNT; - excess = vma->vm_end - vma->vm_start - old_len; - if (old_addr > vma->vm_start && - old_addr + old_len < vma->vm_end) - split = 1; + if (vma->vm_start < old_addr) + account_start = vma->vm_start; + if (vma->vm_end > old_addr + old_len) + account_end = vma->vm_end; } /* @@ -700,11 +701,11 @@ static unsigned long move_vma(struct vm_area_struct *vma, return new_addr; } - if (do_munmap(mm, old_addr, old_len, uf_unmap) < 0) { + if (do_vmi_munmap(&vmi, mm, old_addr, old_len, uf_unmap, false) < 0) { /* OOM: unable to split vma, just get accounts right */ if (vm_flags & VM_ACCOUNT && !(flags & MREMAP_DONTUNMAP)) vm_acct_memory(old_len >> PAGE_SHIFT); - excess = 0; + account_start = account_end = 0; } if (vm_flags & VM_LOCKED) { @@ -715,10 +716,14 @@ static unsigned long move_vma(struct vm_area_struct *vma, mm->hiwater_vm = hiwater_vm; /* Restore VM_ACCOUNT if one or two pieces of vma left */ - if (excess) { + if (account_start) { + vma = vma_prev(&vmi); + vma->vm_flags |= VM_ACCOUNT; + } + + if (account_end) { + vma = vma_next(&vmi); vma->vm_flags |= VM_ACCOUNT; - if (split) - find_vma(mm, vma->vm_end)->vm_flags |= VM_ACCOUNT; } return new_addr;