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=-16.5 required=3.0 tests=BAYES_00,DKIM_INVALID, DKIM_SIGNED,HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_CR_TRAILER,INCLUDES_PATCH, MAILING_LIST_MULTI,MSGID_FROM_MTA_HEADER,SPF_HELO_NONE,SPF_PASS,URIBL_BLOCKED, USER_AGENT_GIT autolearn=ham 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 075ACC433ED for ; Fri, 9 Apr 2021 20:53:46 +0000 (UTC) Received: from kanga.kvack.org (kanga.kvack.org [205.233.56.17]) by mail.kernel.org (Postfix) with ESMTP id A29E8610E7 for ; Fri, 9 Apr 2021 20:53:45 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org A29E8610E7 Authentication-Results: mail.kernel.org; dmarc=fail (p=none dis=none) header.from=oracle.com Authentication-Results: mail.kernel.org; spf=pass smtp.mailfrom=owner-linux-mm@kvack.org Received: by kanga.kvack.org (Postfix) id 455D96B0075; Fri, 9 Apr 2021 16:53:45 -0400 (EDT) Received: by kanga.kvack.org (Postfix, from userid 40) id 406856B0078; Fri, 9 Apr 2021 16:53:45 -0400 (EDT) X-Delivered-To: int-list-linux-mm@kvack.org Received: by kanga.kvack.org (Postfix, from userid 63042) id 1E2AA6B007B; Fri, 9 Apr 2021 16:53:45 -0400 (EDT) X-Delivered-To: linux-mm@kvack.org Received: from forelay.hostedemail.com (smtprelay0228.hostedemail.com [216.40.44.228]) by kanga.kvack.org (Postfix) with ESMTP id 0220A6B0075 for ; Fri, 9 Apr 2021 16:53:44 -0400 (EDT) Received: from smtpin12.hostedemail.com (10.5.19.251.rfc1918.com [10.5.19.251]) by forelay02.hostedemail.com (Postfix) with ESMTP id C1930BF0A for ; Fri, 9 Apr 2021 20:53:44 +0000 (UTC) X-FDA: 78014029968.12.36202FB Received: from aserp2130.oracle.com (aserp2130.oracle.com [141.146.126.79]) by imf26.hostedemail.com (Postfix) with ESMTP id 19DBD40002D2 for ; Fri, 9 Apr 2021 20:53:39 +0000 (UTC) Received: from pps.filterd (aserp2130.oracle.com [127.0.0.1]) by aserp2130.oracle.com (8.16.0.42/8.16.0.42) with SMTP id 139KnFd7028850; Fri, 9 Apr 2021 20:53:29 GMT DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=oracle.com; h=from : to : cc : subject : date : message-id : in-reply-to : references : content-transfer-encoding : content-type : mime-version; s=corp-2020-01-29; bh=KFsTE2vrECjTbvsLeSvgSWewsuDLc2psH6Wi8Zq6GX0=; b=bdCLvTDkwnT2gkxHrV/rx6N6JOkiT6K82v6hnBI/8gF/suiSb22M/640DKc44wlI1zyg fyR85ZLR8t353UGIbdipAhG1HByNzLKTA1GULTWLVQzdq7y63VJndJGEFyOiSz0dKgYI 973dHMly9Ec/2op0MPhk7fODlz7HUNk2PQW7rW9SOvov3/IKz06v1n6UpR18c+NGX6hc /pVGBv3zXpUDSvJeYPkImMJ91FfmuaeTA1FQeWCfUA61mxpdnrwPNyZoB1UrdxxpSDaJ 8Gr/gmJvZo/xoBlhP3D+TK0I+4tsCxZXsVJULg5K0CtORUG7dTjW/ARwBd4+X/rkBfRy dg== Received: from aserp3030.oracle.com (aserp3030.oracle.com [141.146.126.71]) by aserp2130.oracle.com with ESMTP id 37rvawaqb7-1 (version=TLSv1.2 cipher=ECDHE-RSA-AES256-GCM-SHA384 bits=256 verify=OK); Fri, 09 Apr 2021 20:53:29 +0000 Received: from pps.filterd (aserp3030.oracle.com [127.0.0.1]) by aserp3030.oracle.com (8.16.0.42/8.16.0.42) with SMTP id 139KkEYQ178858; Fri, 9 Apr 2021 20:53:29 GMT Received: from nam02-dm3-obe.outbound.protection.outlook.com (mail-dm3nam07lp2048.outbound.protection.outlook.com [104.47.56.48]) by aserp3030.oracle.com with ESMTP id 37rvbj1prb-1 (version=TLSv1.2 cipher=ECDHE-RSA-AES256-GCM-SHA384 bits=256 verify=OK); Fri, 09 Apr 2021 20:53:29 +0000 ARC-Seal: i=1; a=rsa-sha256; s=arcselector9901; d=microsoft.com; cv=none; b=Mq+zzwwjgZ/unbmpKVAKWnkIbQJ2/1ybWlSZ3YTjEn/5TDouNWS+0DttqdYGc7zn8RzCnjO+4b+Gql37NcuvDo/mHkgoXV3Avkr1qzPlDHRcv0X4mvbWOR10J22IQjg4zPJYWNKK2oARnCNncxZcdq4IS5r22P97rsrnPs4H7nGUN1/6k3iQWVtZBU4jhWtNkG+MeLadpq1D0fz054wu/HbWtVzIJRL4Arf6WVZoVf08Cpo2DR1ejlYIs8C6e5yr4HK654TPTOtc5mGh+vwsb6SzgTRZ+q7b4kiK0VKMyEYKDVU5rwhu2DWKZn9IZsLKE9ErpQTL4O7GX1nz63kNyw== 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=KFsTE2vrECjTbvsLeSvgSWewsuDLc2psH6Wi8Zq6GX0=; b=Wk2U3chVzi1/ryDo/4VsaP4Pu9bmb3ibN3/cmfnPYIaSNLZqH3kTDR0Ljo7UuhUe6hVgNqK8y9OcTQFJ+7xNRYFIk5t2EZkU5sa1Kk9f4E2VTHEY0rcNEjP0qPkKHLe4YqVnkTTBlsy723c2RWm6OE+VF3QOSkh3zQsXcpPOPkb1w91DKiHyNZVwNUvsiwA5wAVRpx1dmMEkSAuRtOiDf3Y3I0r5w67vurejbzJCKi/5/QemTJVNOdoUt654oMamgXY8VTx1PvT3xs3BBgqVh1SPle35zyv6TSM2p7+BH2dNtX3qsZ4jBJ4KVPPqEos6uTKzq9b+T90ko5RxXjdfQg== 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=KFsTE2vrECjTbvsLeSvgSWewsuDLc2psH6Wi8Zq6GX0=; b=oHUhXfS3Xwx7OtuFSMepKrsPNlNmxF4C1VRXqVHEocbDXEh5IiSD761AzaATFcZDW6E+zegyYa6zZjdUomYUVx4TthNvPrTi56n98wIExWH+8sA+kHGph48MjJF4gzjf8vDNjZyaM8mvWwe3ANeSn0QUvVlCM6Vca5L1pupIx7E= Authentication-Results: kvack.org; dkim=none (message not signed) header.d=none;kvack.org; dmarc=none action=none header.from=oracle.com; Received: from BY5PR10MB4196.namprd10.prod.outlook.com (2603:10b6:a03:20d::23) by BY5PR10MB3988.namprd10.prod.outlook.com (2603:10b6:a03:1b1::28) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id 15.20.4020.17; Fri, 9 Apr 2021 20:53:27 +0000 Received: from BY5PR10MB4196.namprd10.prod.outlook.com ([fe80::980e:61ba:57d2:47ee]) by BY5PR10MB4196.namprd10.prod.outlook.com ([fe80::980e:61ba:57d2:47ee%7]) with mapi id 15.20.4020.018; Fri, 9 Apr 2021 20:53:27 +0000 From: Mike Kravetz To: linux-mm@kvack.org, linux-kernel@vger.kernel.org, Andrew Morton Cc: Roman Gushchin , Michal Hocko , Shakeel Butt , Oscar Salvador , David Hildenbrand , Muchun Song , David Rientjes , Miaohe Lin , Peter Zijlstra , Matthew Wilcox , HORIGUCHI NAOYA , "Aneesh Kumar K . V" , Waiman Long , Peter Xu , Mina Almasry , Hillf Danton , Joonsoo Kim , Barry Song , Will Deacon , Mike Kravetz Subject: [PATCH v5 8/8] hugetlb: add lockdep_assert_held() calls for hugetlb_lock Date: Fri, 9 Apr 2021 13:52:54 -0700 Message-Id: <20210409205254.242291-9-mike.kravetz@oracle.com> X-Mailer: git-send-email 2.30.2 In-Reply-To: <20210409205254.242291-1-mike.kravetz@oracle.com> References: <20210409205254.242291-1-mike.kravetz@oracle.com> Content-Type: text/plain X-Originating-IP: [50.38.35.18] X-ClientProxiedBy: CO1PR15CA0050.namprd15.prod.outlook.com (2603:10b6:101:1f::18) To BY5PR10MB4196.namprd10.prod.outlook.com (2603:10b6:a03:20d::23) MIME-Version: 1.0 X-MS-Exchange-MessageSentRepresentingType: 1 Received: from monkey.oracle.com (50.38.35.18) by CO1PR15CA0050.namprd15.prod.outlook.com (2603:10b6:101:1f::18) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id 15.20.4020.16 via Frontend Transport; Fri, 9 Apr 2021 20:53:26 +0000 X-MS-PublicTrafficType: Email X-MS-Office365-Filtering-Correlation-Id: 2d0f73a3-cb30-4cc4-19d2-08d8fb9985e8 X-MS-TrafficTypeDiagnostic: BY5PR10MB3988: X-MS-Exchange-Transport-Forked: True X-Microsoft-Antispam-PRVS: X-MS-Oob-TLC-OOBClassifiers: OLM:4303; X-MS-Exchange-SenderADCheck: 1 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:(376002)(346002)(396003)(136003)(366004)(39860400002)(7416002)(478600001)(8936002)(107886003)(83380400001)(36756003)(956004)(6486002)(52116002)(8676002)(2616005)(44832011)(4326008)(38100700001)(38350700001)(2906002)(86362001)(66946007)(26005)(66556008)(7696005)(16526019)(6666004)(186003)(316002)(1076003)(6916009)(54906003)(5660300002)(66476007);DIR:OUT;SFP:1101; X-MS-Exchange-AntiSpam-MessageData: =?us-ascii?Q?cyRA/lTHwt/ZUdGIrnmjgdTbz1rkN9ZCzUMx8EHZjMcbmFUiaQwZaSXFtdMp?= =?us-ascii?Q?bJhWKBhqm8J1s3oXxOzmuhTEpNrVyFXzj8I0B5kNFcw19shCsKgUVAeoWYZA?= =?us-ascii?Q?trW3RJ7MC1PZVoXw3DUCyrqlCuul4uVRVvQ6of8u5aHqA7JXgKLxgNIsEx3d?= =?us-ascii?Q?MoexMaSlAgTYUp+TjmkwPoKq7xHD9qgo/I21EWHXJ/Yp+5wySVcpeoydMgUB?= =?us-ascii?Q?ddSGrzWmRW5C5P1nCVcKO53SkfKrw1OWgonXnXep/Y4DhidoJaulqkmDD9tX?= =?us-ascii?Q?TIdPDueupr0qM0B27sqCarV7tNKe7SZ+l4l77eRyHPuWlKal5HGCknmxr6CB?= =?us-ascii?Q?adfrvyAL3ILWHkDJJHDOZq5VvDlz2E8EkKTAkK7OHM54rVeaPEVir7Ia5Z0n?= =?us-ascii?Q?Uc67H0U2kkLvzz8XSvsU8vkaGR6Xr2dZ5zoMNd0u6TLWfu0CHRDDH7URk/pB?= =?us-ascii?Q?obQc5G+MUrmSEQKJsgdxjO3oZ8IUpORuYLGuPVML0xrqNdUGekqjg/PR5eDf?= =?us-ascii?Q?ILZ3vHp4QBF38C6+DWybrFVNKRrbbuolz5yh6kYeMkrCvD7CTQ9TVKCeu0f4?= =?us-ascii?Q?iAsX12hw/k6OoJaHUm1PnR46MFSEA8K8zZwaIPWCU3ZKnmjNTwfhIuN+VkAq?= =?us-ascii?Q?iPoLqwiiXXx6qA5nq614EwPfCGxEcMiyIqsd4tAP7xxHykOOhtRI86MU/UY6?= =?us-ascii?Q?OgYNn+cQB22nnIgSXEq8aEtftcRFPnYVNIJNvDG9bmMZK4M7d9wrpzvTbobu?= =?us-ascii?Q?hl4pQuhnxE0yXWlqx3RFiu+GxtHtTxY9Tc9veNth73a+FzGghF+gcwAp3w1h?= =?us-ascii?Q?p25NGgjco+amp3glnqxVu4CvQkSggUSj6Ke27PpiKK3NjgnayoFsjBWz+bHj?= =?us-ascii?Q?fOaMxggsoL89zDdvD2yVSCeqQ8FvE1nPGyyQ0xInL6tgKgkxKcxMKoxkD4T6?= =?us-ascii?Q?g3+aTy9Zt6Qa1M9/wvfpUThgigM+Nf8ixSf+a1290eaoggXanh1g35WowHNQ?= =?us-ascii?Q?LmEMhmBE2jxZLImZdDdhFbMEY/pG30kHSfbALPcqiDuNquoKcCYj5JwFLuLl?= =?us-ascii?Q?bRi145TGaiw4RF8emJRBwkOZVHTDkXl7jPqDMIQyRYifvYWDh79K3THe9x6e?= =?us-ascii?Q?jl4vAKFc5esNS9X5NVEdMAI2+UeIeVhY6GGK7mS4DY5/9G9Y4dUTfyxuaehz?= =?us-ascii?Q?84RC6UDIHwxUGfc8nLwy5Lu5ee3E3usy6aTz4aB40Au/YrnWUDzsxO2s23hX?= =?us-ascii?Q?SgPQiFDT4yPqJeEXDy4/YRiKlhS9N/TFF1VE+2PEBOhCxcKX6jBMNzq9SlpM?= =?us-ascii?Q?bLV3waZ7vnm8XKWa88zCqwSk?= X-OriginatorOrg: oracle.com X-MS-Exchange-CrossTenant-Network-Message-Id: 2d0f73a3-cb30-4cc4-19d2-08d8fb9985e8 X-MS-Exchange-CrossTenant-AuthSource: BY5PR10MB4196.namprd10.prod.outlook.com X-MS-Exchange-CrossTenant-AuthAs: Internal X-MS-Exchange-CrossTenant-OriginalArrivalTime: 09 Apr 2021 20:53:26.9771 (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: 3Lc1KW/iyas++eVDh/ESSZxRaQRzFVlw0BaHgUHtTYBNLCo/dacUiK/uw1KMQpeTGgyQkupq+Kfuz2gO6SYAAA== X-MS-Exchange-Transport-CrossTenantHeadersStamped: BY5PR10MB3988 X-Proofpoint-Virus-Version: vendor=nai engine=6200 definitions=9949 signatures=668683 X-Proofpoint-Spam-Details: rule=notspam policy=default score=0 adultscore=0 mlxlogscore=999 malwarescore=0 mlxscore=0 phishscore=0 spamscore=0 bulkscore=0 suspectscore=0 classifier=spam adjust=0 reason=mlx scancount=1 engine=8.12.0-2104060000 definitions=main-2104090152 X-Proofpoint-ORIG-GUID: kzBVHzZqU5QGTFo6kwtiGUmyHpnJ3dXw X-Proofpoint-GUID: kzBVHzZqU5QGTFo6kwtiGUmyHpnJ3dXw X-Proofpoint-Virus-Version: vendor=nai engine=6200 definitions=9949 signatures=668683 X-Proofpoint-Spam-Details: rule=notspam policy=default score=0 lowpriorityscore=0 priorityscore=1501 suspectscore=0 phishscore=0 mlxlogscore=999 spamscore=0 malwarescore=0 mlxscore=0 bulkscore=0 impostorscore=0 adultscore=0 clxscore=1015 classifier=spam adjust=0 reason=mlx scancount=1 engine=8.12.0-2104060000 definitions=main-2104090152 X-Rspamd-Queue-Id: 19DBD40002D2 X-Stat-Signature: 3mxaraimgm5n49fw9b5t4s1nf5wtzdx5 X-Rspamd-Server: rspam02 Received-SPF: none (oracle.com>: No applicable sender policy available) receiver=imf26; identity=mailfrom; envelope-from=""; helo=aserp2130.oracle.com; client-ip=141.146.126.79 X-HE-DKIM-Result: pass/pass X-HE-Tag: 1618001619-274638 Content-Transfer-Encoding: quoted-printable 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: After making hugetlb lock irq safe and separating some functionality done under the lock, add some lockdep_assert_held to help verify locking. Signed-off-by: Mike Kravetz Acked-by: Michal Hocko Reviewed-by: Miaohe Lin Reviewed-by: Muchun Song Reviewed-by: Oscar Salvador --- mm/hugetlb.c | 9 +++++++++ 1 file changed, 9 insertions(+) diff --git a/mm/hugetlb.c b/mm/hugetlb.c index 049ca0bccfcc..5cf2b7e5ca50 100644 --- a/mm/hugetlb.c +++ b/mm/hugetlb.c @@ -1062,6 +1062,8 @@ static bool vma_has_reserves(struct vm_area_struct = *vma, long chg) static void enqueue_huge_page(struct hstate *h, struct page *page) { int nid =3D page_to_nid(page); + + lockdep_assert_held(&hugetlb_lock); list_move(&page->lru, &h->hugepage_freelists[nid]); h->free_huge_pages++; h->free_huge_pages_node[nid]++; @@ -1073,6 +1075,7 @@ static struct page *dequeue_huge_page_node_exact(st= ruct hstate *h, int nid) struct page *page; bool pin =3D !!(current->flags & PF_MEMALLOC_PIN); =20 + lockdep_assert_held(&hugetlb_lock); list_for_each_entry(page, &h->hugepage_freelists[nid], lru) { if (pin && !is_pinnable_page(page)) continue; @@ -1344,6 +1347,7 @@ static void remove_hugetlb_page(struct hstate *h, s= truct page *page, VM_BUG_ON_PAGE(hugetlb_cgroup_from_page(page), page); VM_BUG_ON_PAGE(hugetlb_cgroup_from_page_rsvd(page), page); =20 + lockdep_assert_held(&hugetlb_lock); if (hstate_is_gigantic(h) && !gigantic_page_runtime_supported()) return; =20 @@ -1694,6 +1698,7 @@ static struct page *remove_pool_huge_page(struct hs= tate *h, int nr_nodes, node; struct page *page =3D NULL; =20 + lockdep_assert_held(&hugetlb_lock); for_each_node_mask_to_free(h, nr_nodes, node, nodes_allowed) { /* * If we're returning unused surplus pages, only examine @@ -1943,6 +1948,7 @@ static int gather_surplus_pages(struct hstate *h, l= ong delta) long needed, allocated; bool alloc_ok =3D true; =20 + lockdep_assert_held(&hugetlb_lock); needed =3D (h->resv_huge_pages + delta) - h->free_huge_pages; if (needed <=3D 0) { h->resv_huge_pages +=3D delta; @@ -2036,6 +2042,7 @@ static void return_unused_surplus_pages(struct hsta= te *h, struct page *page; LIST_HEAD(page_list); =20 + lockdep_assert_held(&hugetlb_lock); /* Uncommit the reservation */ h->resv_huge_pages -=3D unused_resv_pages; =20 @@ -2524,6 +2531,7 @@ static void try_to_free_low(struct hstate *h, unsig= ned long count, int i; LIST_HEAD(page_list); =20 + lockdep_assert_held(&hugetlb_lock); if (hstate_is_gigantic(h)) return; =20 @@ -2565,6 +2573,7 @@ static int adjust_pool_surplus(struct hstate *h, no= demask_t *nodes_allowed, { int nr_nodes, node; =20 + lockdep_assert_held(&hugetlb_lock); VM_BUG_ON(delta !=3D -1 && delta !=3D 1); =20 if (delta < 0) { --=20 2.30.2