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 X-Spam-Level: X-Spam-Status: No, score=-18.8 required=3.0 tests=BAYES_00,DKIM_SIGNED, DKIM_VALID,DKIM_VALID_AU,HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_CR_TRAILER, INCLUDES_PATCH,MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS,USER_AGENT_GIT autolearn=unavailable autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id A893BC4338F for ; Tue, 17 Aug 2021 15:55:23 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 92D0260FD7 for ; Tue, 17 Aug 2021 15:55:23 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S240839AbhHQPzx (ORCPT ); Tue, 17 Aug 2021 11:55:53 -0400 Received: from mx0b-00069f02.pphosted.com ([205.220.177.32]:29980 "EHLO mx0b-00069f02.pphosted.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S240332AbhHQPtD (ORCPT ); Tue, 17 Aug 2021 11:49:03 -0400 Received: from pps.filterd (m0246632.ppops.net [127.0.0.1]) by mx0b-00069f02.pphosted.com (8.16.0.43/8.16.0.43) with SMTP id 17HFjTxb006859; Tue, 17 Aug 2021 15:48:06 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-2021-07-09; bh=2nAYhm9Z8cGDBge+bfJCbS5/JgpnKvcScZgWzRNowhw=; b=zSOoGil+vA7Fzo/nv+4/3GDVNN4r+5AAh/o+1CRnbe5cUsLM81+pE76HZp/UmiEx0qKV lafImcLut3Er96ZvcBv/OEg6VaKSgTqQUk6yRyOJy/x4Tqxt1y6o+2RxVP/waaVvZvQ/ wUM3UD+R/Dz8/sDaX9CnyXV7NMzwkJe6tGJjS7n63CWrhRAXDN38i7GpvQs6LcnijAdL m2fzK/EHOAUw9/YZlt0qhG74bJMDzQlf/tPM7AQQeTykK1r1ruZAML1pkY1Y56LUnQIN el3608kN9PFP2arAtpe4PA9fXJeJLR18+5IAkjvG6a03UD10WhVGiDHLfr0KkNys6c2h mw== 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-2020-01-29; bh=2nAYhm9Z8cGDBge+bfJCbS5/JgpnKvcScZgWzRNowhw=; b=jeYA/t6hFj3zXQ0IvZiZxPPUtDWYxskS75Q9wu/pwR1/CLF0bKaUUNJCGrZQcNSYHVsx JH9cv1ca0K6lL0yzVm1c5RFBuUQ0Xm4kvI/MOf+XnrcJX97tzDwkKQ5ntah8jGZnNlbu OiT8pmJnc0pPNzFbLzLHl9FcnrzaHqJ/CQM9YK70PzxW+jqbao2sFolkW3tLSpMY/nr7 EIqZGRUiwdNI98+hwTbFzH+bj2qHDosPvkc1UtchVbJk1VjFhP4Uv5cbXOMc4Tmexumq VrmWD76/Vgl5z6umeMCI35IstyBGQgLaAlVOktgepwe8UJUD4723N2b47NKSi/UxBMsV fg== Received: from userp3030.oracle.com (userp3030.oracle.com [156.151.31.80]) by mx0b-00069f02.pphosted.com with ESMTP id 3afgmbc9wv-1 (version=TLSv1.2 cipher=ECDHE-RSA-AES256-GCM-SHA384 bits=256 verify=OK); Tue, 17 Aug 2021 15:48:06 +0000 Received: from pps.filterd (userp3030.oracle.com [127.0.0.1]) by userp3030.oracle.com (8.16.0.42/8.16.0.42) with SMTP id 17HFj3Oe174039; Tue, 17 Aug 2021 15:48:04 GMT Received: from nam11-co1-obe.outbound.protection.outlook.com (mail-co1nam11lp2176.outbound.protection.outlook.com [104.47.56.176]) by userp3030.oracle.com with ESMTP id 3ae2y0d2vn-3 (version=TLSv1.2 cipher=ECDHE-RSA-AES256-GCM-SHA384 bits=256 verify=OK); Tue, 17 Aug 2021 15:48:04 +0000 ARC-Seal: i=1; a=rsa-sha256; s=arcselector9901; d=microsoft.com; cv=none; b=RINROcSh0FdTd8HaHiupHaCUgxU6DKzrIY+5LdoccbpoE9+Jxe6xBMWz5RGZscKRQND646wfDnfMbdKUXW/m3xfjZwhfh2v4Xkp6NMJhmf2dGh+dcl2RGvP2SWkFA3zbNIzB1JXx1r6qoREnXuoMgTieOuGVnXW5GZbnIFpvV/8Mf4yU2R9y8/qa0UeY6rufLQrXqpN/O5fpSAP5jM9Qa0CdxB275iqlsu57HUe1OyvIslTbnLTJk18Bs2hyCPnledZpbnQtrdycpO8oyqHbrhkfOeFZg6tANwnEAwVBwtfiNb+V11Qx9GFGDGtUGfEerQF7nj0lnzeYHqGYcUon3w== 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-SenderADCheck; bh=2nAYhm9Z8cGDBge+bfJCbS5/JgpnKvcScZgWzRNowhw=; b=mGyjopym9YLpUDEWXca8JcXrjd8mMbpzYbxsTj/aoLfXIdvJ/RSm5cNDFBNTRiw7mjGg735b0KTL883iq/fIPjXXjW/7G6eK1N+tDNlNu1YknZ0d13eKFC6BEWrXVwTulrbkhjW3WWw/K5zkr8DASI/DFKkZxXhKZ5kYLJm4kt43xp+NrdE1AlXM+HVCATCqFv6apr+eaNLAqmc50kE4MWmtkqdR3tc7zGYziuWT6CH9XwIVgk5q1jZshW/vuCdccoMUZ7a1sHHRwXTk+h2dpwPmELCC8FKvZuUB+wycBI5DTPj4IuDhQmy6okeZ1gtHxbYne2SPekX/+QHX3kQFig== 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=2nAYhm9Z8cGDBge+bfJCbS5/JgpnKvcScZgWzRNowhw=; b=zj8fdHUvFxbkeb61gDxw/FiiMMQoiRcVW0E3+Ta4dmiLSr8rwvSdUieoUYt10TkplSih61OR0AdGP8h6P/QhmuuvI7H+bOKYixrb4WGFvll0b8yXf1ksi+LVBuKD+ivbl4ixzWTE+DKZLW1JATl0K3ywSg2MhUWBvupPSyuVZ44= Received: from DM6PR10MB4380.namprd10.prod.outlook.com (2603:10b6:5:223::19) by DM6PR10MB3580.namprd10.prod.outlook.com (2603:10b6:5:156::31) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id 15.20.4415.17; Tue, 17 Aug 2021 15:47:57 +0000 Received: from DM6PR10MB4380.namprd10.prod.outlook.com ([fe80::585:1aa0:6582:92f3]) by DM6PR10MB4380.namprd10.prod.outlook.com ([fe80::585:1aa0:6582:92f3%6]) with mapi id 15.20.4415.024; Tue, 17 Aug 2021 15:47:57 +0000 From: Liam Howlett To: "maple-tree@lists.infradead.org" , "linux-mm@kvack.org" , "linux-kernel@vger.kernel.org" , Andrew Morton CC: Song Liu , Davidlohr Bueso , "Paul E . McKenney" , Matthew Wilcox , Laurent Dufour , David Rientjes , Axel Rasmussen , Suren Baghdasaryan , Vlastimil Babka , Rik van Riel , Peter Zijlstra , Michel Lespinasse , Liam Howlett Subject: [PATCH v2 52/61] mm/mempolicy: Use maple tree iterators instead of vma linked list Thread-Topic: [PATCH v2 52/61] mm/mempolicy: Use maple tree iterators instead of vma linked list Thread-Index: AQHXk38w+kCOBwzH/EGkIuQTPUOe/Q== Date: Tue, 17 Aug 2021 15:47:31 +0000 Message-ID: <20210817154651.1570984-53-Liam.Howlett@oracle.com> References: <20210817154651.1570984-1-Liam.Howlett@oracle.com> In-Reply-To: <20210817154651.1570984-1-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 2.30.2 authentication-results: lists.infradead.org; dkim=none (message not signed) header.d=none;lists.infradead.org; dmarc=none action=none header.from=oracle.com; x-ms-publictraffictype: Email x-ms-office365-filtering-correlation-id: eaa40bdd-a193-416b-246b-08d9619662b2 x-ms-traffictypediagnostic: DM6PR10MB3580: x-ms-exchange-transport-forked: True x-microsoft-antispam-prvs: x-ms-oob-tlc-oobclassifiers: OLM:5797; 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:DM6PR10MB4380.namprd10.prod.outlook.com;PTR:;CAT:NONE;SFS:(346002)(376002)(39860400002)(366004)(136003)(396003)(38070700005)(6506007)(6512007)(2906002)(83380400001)(4326008)(5660300002)(71200400001)(6666004)(44832011)(8936002)(64756008)(66556008)(66476007)(76116006)(478600001)(66446008)(2616005)(66946007)(91956017)(36756003)(6486002)(1076003)(7416002)(107886003)(186003)(38100700002)(26005)(122000001)(316002)(54906003)(110136005)(8676002)(86362001);DIR:OUT;SFP:1101; x-ms-exchange-antispam-messagedata-chunkcount: 1 x-ms-exchange-antispam-messagedata-0: =?iso-8859-1?Q?rRrWyr/sIi1KsGfxGG1TtQdqJOsEkgK1JxfwTdpg1DeXxPIojtGeJ7MCgR?= =?iso-8859-1?Q?+I4T/7nAK4A3Ubkmj6c2UgedEeC+gfKP7H1ohDPO7KriNUb3v3p7KwYoRl?= =?iso-8859-1?Q?kmu6LUtGL5ma+Ihc5ilb+BtfAdhgj+Bpzo9AleK1A1hl8Upp+FHHxvj3A7?= =?iso-8859-1?Q?cy8Bj2jfhfiL2TtmIB3+fRTm+On5LUZmK1LkHr5TQGWOMuwtN9GtwzfyMD?= =?iso-8859-1?Q?nLqqw+S01vIcBvYeUYJJtw3D8CUnegwfj/HG8A29COudHLSeqLFgDahU54?= =?iso-8859-1?Q?Zj1QjxJ+zvvsyojmYioQAQOEJ+73O43l0ISOF+/9vImk3MF9B2Zhfi2i9j?= =?iso-8859-1?Q?oyIIYr2Aup0v0/X+QChHIhtYDIONpk0T9BaRUklGz0O69GT0ge1O0nQId/?= =?iso-8859-1?Q?Djqf0LDIpoPCcybL6j+XaPCEvDCcxPPPl85QWbkw9R8dyp7xBKRkuoyzjf?= =?iso-8859-1?Q?wQeHQXljYXWjzzWPVcjRrVv7ndDxlj3ElfZop/Zxcf48bO5ckQe2y4GzUK?= =?iso-8859-1?Q?i2h7c8T08RW/0KY4xmzyQqo8pL4ruRmphpHwR+hlY1NeptRQ5AKY6ciF+O?= =?iso-8859-1?Q?9FfoH5uxnX7O1S0thXkxizj1kwOXjNHFGD7t4ReUBN2IuCTRp29j/kBznq?= =?iso-8859-1?Q?vDjShSPoIg+Ry4XrywZwStkdi9mMk98npiJAlucf3ksgSchS7n/ElG7ndS?= =?iso-8859-1?Q?ycN9rUn5mnb+haop+OG2e16Aboa7KMTeSyhgQtNPSSD/9HhLrGrvtR9+E3?= =?iso-8859-1?Q?iXhHZD4Xu9MI2zw0qRp81kdRSSx6WRHdzZeXzH9n+tVUZD6JQYfsEhRhWo?= =?iso-8859-1?Q?xvuOmouvu1saGVvgZvhWFrU31xMHfxUedzA0VyxMPyhxUgYMeQjgZfsau6?= =?iso-8859-1?Q?F7Oib2X3Azcj5v17BTihr6hRDz9Jgfar/OLZtt1kAuwnAwuUYGDABNn8t1?= =?iso-8859-1?Q?cLJkm9hrlaVD8Sx7zDMy0VBcuc/GOOkqZSKh+Y7Wm6lWHlH0fdddQTqQ5i?= =?iso-8859-1?Q?bhqzI1lZiHKnJ5Ww67tfpT+s8/TX4CwDIbbpxY4ghw3quLsfL96YgwK15o?= =?iso-8859-1?Q?AE7nSputRX8EtuJl4unIXy4A1BDzwuZe9bJSMdN27P83q7yltx1I1kOV7J?= =?iso-8859-1?Q?SBHQGnxKlaXj6bcKLbUTD0yN5H6SA6fmKrlbdiaT4uO7x34XYLVouDUWPi?= =?iso-8859-1?Q?9v+BISGe/yGWPUzEOVojHI5RT0leSMiJCsA9GSaJ/DBlyuqGWTSGDgJu7E?= =?iso-8859-1?Q?ylRMG3dF2/IPtQK8z4QBn5XiKpavmvbD6vfqoyLHpQAWGB2sjutWfCTKPP?= =?iso-8859-1?Q?pzmSLxv5kneC7tE+Cum/SMcqxmWYv8qIoqNRGjuzSu7cw+KELvQlBisYXN?= =?iso-8859-1?Q?q7P+Fc0+qK?= Content-Type: text/plain; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable MIME-Version: 1.0 X-OriginatorOrg: oracle.com X-MS-Exchange-CrossTenant-AuthAs: Internal X-MS-Exchange-CrossTenant-AuthSource: DM6PR10MB4380.namprd10.prod.outlook.com X-MS-Exchange-CrossTenant-Network-Message-Id: eaa40bdd-a193-416b-246b-08d9619662b2 X-MS-Exchange-CrossTenant-originalarrivaltime: 17 Aug 2021 15:47:31.9073 (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: 4BzVF0AgMuIPgS//hnVp8g46TfvwPV6xKemj60fHKNrHL5NypEnucdQYWS1c/sRBqqr7iXnWOaT/kGUsS9dYyA== X-MS-Exchange-Transport-CrossTenantHeadersStamped: DM6PR10MB3580 X-Proofpoint-Virus-Version: vendor=nai engine=6200 definitions=10079 signatures=668682 X-Proofpoint-Spam-Details: rule=notspam policy=default score=0 bulkscore=0 spamscore=0 adultscore=0 suspectscore=0 phishscore=0 mlxlogscore=999 malwarescore=0 mlxscore=0 classifier=spam adjust=0 reason=mlx scancount=1 engine=8.12.0-2107140000 definitions=main-2108170097 X-Proofpoint-ORIG-GUID: 1XsF3aEJqBkITLVpkSz6OjYryGcFrN3m X-Proofpoint-GUID: 1XsF3aEJqBkITLVpkSz6OjYryGcFrN3m Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org From: "Liam R. Howlett" Signed-off-by: Liam R. Howlett --- mm/mempolicy.c | 41 +++++++++++++++++++++++++---------------- 1 file changed, 25 insertions(+), 16 deletions(-) diff --git a/mm/mempolicy.c b/mm/mempolicy.c index 9d3afa015fac..c8ded4c7dc93 100644 --- a/mm/mempolicy.c +++ b/mm/mempolicy.c @@ -377,10 +377,13 @@ void mpol_rebind_task(struct task_struct *tsk, const = nodemask_t *new) void mpol_rebind_mm(struct mm_struct *mm, nodemask_t *new) { struct vm_area_struct *vma; + MA_STATE(mas, &mm->mm_mt, 0, 0); =20 mmap_write_lock(mm); - for (vma =3D mm->mmap; vma; vma =3D vma->vm_next) + mas_lock(&mas); + mas_for_each(&mas, vma, ULONG_MAX) mpol_rebind_policy(vma->vm_policy, new); + mas_unlock(&mas); mmap_write_unlock(mm); } =20 @@ -652,7 +655,7 @@ static unsigned long change_prot_numa(struct vm_area_st= ruct *vma, static int queue_pages_test_walk(unsigned long start, unsigned long end, struct mm_walk *walk) { - struct vm_area_struct *vma =3D walk->vma; + struct vm_area_struct *next, *vma =3D walk->vma; struct queue_pages *qp =3D walk->private; unsigned long endvma =3D vma->vm_end; unsigned long flags =3D qp->flags; @@ -667,9 +670,10 @@ static int queue_pages_test_walk(unsigned long start, = unsigned long end, /* hole at head side of range */ return -EFAULT; } + next =3D vma_next(vma->vm_mm, vma); if (!(flags & MPOL_MF_DISCONTIG_OK) && ((vma->vm_end < qp->end) && - (!vma->vm_next || vma->vm_end < vma->vm_next->vm_start))) + (!next || vma->vm_end < next->vm_start))) /* hole at middle or tail of range */ return -EFAULT; =20 @@ -783,28 +787,28 @@ static int vma_replace_policy(struct vm_area_struct *= vma, static int mbind_range(struct mm_struct *mm, unsigned long start, unsigned long end, struct mempolicy *new_pol) { - struct vm_area_struct *next; struct vm_area_struct *prev; struct vm_area_struct *vma; int err =3D 0; pgoff_t pgoff; unsigned long vmstart; unsigned long vmend; + unsigned long index =3D start; =20 - vma =3D find_vma(mm, start); + rcu_read_lock(); + vma =3D find_vma_intersection(mm, start, end); VM_BUG_ON(!vma); =20 - prev =3D vma->vm_prev; + prev =3D vma_prev(mm, vma); if (start > vma->vm_start) prev =3D vma; =20 - for (; vma && vma->vm_start < end; prev =3D vma, vma =3D next) { - next =3D vma->vm_next; + mt_for_each(&mm->mm_mt, vma, index, end - 1) { vmstart =3D max(start, vma->vm_start); vmend =3D min(end, vma->vm_end); =20 if (mpol_equal(vma_policy(vma), new_pol)) - continue; + goto next; =20 pgoff =3D vma->vm_pgoff + ((vmstart - vma->vm_start) >> PAGE_SHIFT); @@ -813,7 +817,6 @@ static int mbind_range(struct mm_struct *mm, unsigned l= ong start, new_pol, vma->vm_userfaultfd_ctx); if (prev) { vma =3D prev; - next =3D vma->vm_next; if (mpol_equal(vma_policy(vma), new_pol)) continue; /* vma_merge() joined vma && vma->next, case 8 */ @@ -829,13 +832,16 @@ static int mbind_range(struct mm_struct *mm, unsigned= long start, if (err) goto out; } - replace: +replace: err =3D vma_replace_policy(vma, new_pol); if (err) goto out; +next: + prev =3D vma; } =20 - out: +out: + rcu_read_unlock(); return err; } =20 @@ -1063,6 +1069,7 @@ static int migrate_to_node(struct mm_struct *mm, int = source, int dest, int flags) { nodemask_t nmask; + struct vm_area_struct *vma; LIST_HEAD(pagelist); int err =3D 0; struct migration_target_control mtc =3D { @@ -1078,8 +1085,9 @@ static int migrate_to_node(struct mm_struct *mm, int = source, int dest, * need migration. Between passing in the full user address * space range and MPOL_MF_DISCONTIG_OK, this call can not fail. */ + vma =3D find_vma(mm, 0); VM_BUG_ON(!(flags & (MPOL_MF_MOVE | MPOL_MF_MOVE_ALL))); - queue_pages_range(mm, mm->mmap->vm_start, mm->task_size, &nmask, + queue_pages_range(mm, vma->vm_start, mm->task_size, &nmask, flags | MPOL_MF_DISCONTIG_OK, &pagelist); =20 if (!list_empty(&pagelist)) { @@ -1208,14 +1216,15 @@ static struct page *new_page(struct page *page, uns= igned long start) { struct vm_area_struct *vma; unsigned long address; + MA_STATE(mas, ¤t->mm->mm_mt, start, start); =20 - vma =3D find_vma(current->mm, start); - while (vma) { + rcu_read_lock(); + mas_for_each(&mas, vma, ULONG_MAX) { address =3D page_address_in_vma(page, vma); if (address !=3D -EFAULT) break; - vma =3D vma->vm_next; } + rcu_read_unlock(); =20 if (PageHuge(page)) { return alloc_huge_page_vma(page_hstate(compound_head(page)), --=20 2.30.2