Received: by 2002:a05:6358:3188:b0:123:57c1:9b43 with SMTP id q8csp4365177rwd; Tue, 23 May 2023 06:54:36 -0700 (PDT) X-Google-Smtp-Source: ACHHUZ6UhZ+78a4q9HXMapbTQRTbX00hXsYj+7TJbWpbtiPRO+FGJemAx0/OuYYkMAFd8brM6CDO X-Received: by 2002:a17:90a:760c:b0:253:38bf:9757 with SMTP id s12-20020a17090a760c00b0025338bf9757mr13308704pjk.43.1684850076008; Tue, 23 May 2023 06:54:36 -0700 (PDT) ARC-Seal: i=2; a=rsa-sha256; t=1684850075; cv=pass; d=google.com; s=arc-20160816; b=vzxiFHrE+Cpx+wGJY9taCpvY1OAPuQOQX4WMfrio0CyxPYfMsinhG5x6tndnsa/fsM ql8H5QMMphu69eoRPZbhWDyhkJwQABJZ+3KrRfW10kYSmyeC8oiWPyCd1YgDlN60e+fa eUM/7c8qnk24Fzm2o4Vj5hQS6ApZc5mhM+h3XGNcAnhEG0N7eg/HTM8PMu5EZSJvKKlQ i2YINYKLwZh2+pU6MxmRjsFVG+D0jAifhCW20GRs6GtoiLZ4bIoFpMtr04LyATUZdbP8 o10NVLA0iGws+dB4628rB3qmzq6JqKv9bXZPS/kPuIqZ4bFRUdrB90HkXqJqJng/bpaP hGsQ== ARC-Message-Signature: i=2; a=rsa-sha256; c=relaxed/relaxed; d=google.com; s=arc-20160816; h=list-id:precedence:mime-version:user-agent:in-reply-to :content-disposition:references:mail-followup-to:message-id:subject :cc:to:from:date:dkim-signature:dkim-signature; bh=bMdioD16BwgetLPc71Xpo1uIYyHFuG/uxMXnxB9Z4fE=; b=F3FsosYkKl4sHQObmocQl41OOdTMKuvGRu7NuzC90se0Ig8cAqod5cucErKIiOZ83V 4QY8r0uxXHuyWp621ZzWYXbZZPLgzrwJsGthKMjcemOPFYquF07ITE1QRGmWtDA07+cS dVtZTOugN+j27lLCACGKAlFJSdM7izpmBaO/dxocxxmpfJYJzuWIRrNXoDJTLpPjgnC6 JuHl9g4s01LEm6QnFoscF75imh51Y6+wYjksD6NCJ/SMwDc5GxrF/pS4bCVlFkr2lPE1 ua2iny1iAY05o7oN1X4EY40ZHinCM+XuXQOc2/+g0TxcVnh74KT+TPwi4VxXY7x4usSc XOgQ== ARC-Authentication-Results: i=2; mx.google.com; dkim=pass header.i=@oracle.com header.s=corp-2023-03-30 header.b=nO43qutB; dkim=pass header.i=@oracle.onmicrosoft.com header.s=selector2-oracle-onmicrosoft-com header.b=SRnk0RM5; arc=pass (i=1 spf=pass spfdomain=oracle.com dkim=pass dkdomain=oracle.com dmarc=pass fromdomain=oracle.com); spf=pass (google.com: domain of linux-kernel-owner@vger.kernel.org designates 2620:137:e000::1:20 as permitted sender) smtp.mailfrom=linux-kernel-owner@vger.kernel.org; dmarc=pass (p=NONE sp=NONE dis=NONE) header.from=oracle.com Return-Path: Received: from out1.vger.email (out1.vger.email. [2620:137:e000::1:20]) by mx.google.com with ESMTP id c192-20020a6335c9000000b0053eefa04db9si1387912pga.48.2023.05.23.06.54.22; Tue, 23 May 2023 06:54:35 -0700 (PDT) Received-SPF: pass (google.com: domain of linux-kernel-owner@vger.kernel.org designates 2620:137:e000::1:20 as permitted sender) client-ip=2620:137:e000::1:20; Authentication-Results: mx.google.com; dkim=pass header.i=@oracle.com header.s=corp-2023-03-30 header.b=nO43qutB; dkim=pass header.i=@oracle.onmicrosoft.com header.s=selector2-oracle-onmicrosoft-com header.b=SRnk0RM5; arc=pass (i=1 spf=pass spfdomain=oracle.com dkim=pass dkdomain=oracle.com dmarc=pass fromdomain=oracle.com); spf=pass (google.com: domain of linux-kernel-owner@vger.kernel.org designates 2620:137:e000::1:20 as permitted sender) smtp.mailfrom=linux-kernel-owner@vger.kernel.org; dmarc=pass (p=NONE sp=NONE dis=NONE) header.from=oracle.com Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S236968AbjEWNrY (ORCPT + 99 others); Tue, 23 May 2023 09:47:24 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:35704 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S234307AbjEWNrX (ORCPT ); Tue, 23 May 2023 09:47:23 -0400 Received: from mx0b-00069f02.pphosted.com (mx0b-00069f02.pphosted.com [205.220.177.32]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id A8C1DCA for ; Tue, 23 May 2023 06:47:21 -0700 (PDT) Received: from pps.filterd (m0333520.ppops.net [127.0.0.1]) by mx0b-00069f02.pphosted.com (8.17.1.19/8.17.1.19) with ESMTP id 34NDi05T011762; Tue, 23 May 2023 13:46:53 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-2023-03-30; bh=bMdioD16BwgetLPc71Xpo1uIYyHFuG/uxMXnxB9Z4fE=; b=nO43qutBWF0Q34r9ihGGl7T6awPiLoUdzo82LP32hTmqw/Du0sic3ZERvX3E9JLAwV30 cdXHY1d0MwI8DKriJ/QTQ9TzxrxMXg9gYqWYL3mNShBrM+p1QDilxrH+Y0UU+j350S5v Y/JjDDj3MMvMhU1sVz1nBFCKHGqUIB+laj8hsl87RlFRBT9+2mp4XlMYT8PlY5NiRrxe aPkH5edy0PViMCcH4P0gJZsRwiJZDwuBatJ4/2+tchDG5DKaR0bf2YMP2fsJzMqI6LAA w6LBBmEqUpe6fbsf1xVuxhy7F3wlTbl++xZaivsS2sOe0A4VjWPOmhE8t7bgGv+PmEvL FQ== Received: from phxpaimrmta02.imrmtpd1.prodappphxaev1.oraclevcn.com (phxpaimrmta02.appoci.oracle.com [147.154.114.232]) by mx0b-00069f02.pphosted.com (PPS) with ESMTPS id 3qpp8cd72a-1 (version=TLSv1.2 cipher=ECDHE-RSA-AES256-GCM-SHA384 bits=256 verify=OK); Tue, 23 May 2023 13:46:52 +0000 Received: from pps.filterd (phxpaimrmta02.imrmtpd1.prodappphxaev1.oraclevcn.com [127.0.0.1]) by phxpaimrmta02.imrmtpd1.prodappphxaev1.oraclevcn.com (8.17.1.19/8.17.1.19) with ESMTP id 34NDMLBA028913; Tue, 23 May 2023 13:46:51 GMT Received: from nam11-co1-obe.outbound.protection.outlook.com (mail-co1nam11lp2169.outbound.protection.outlook.com [104.47.56.169]) by phxpaimrmta02.imrmtpd1.prodappphxaev1.oraclevcn.com (PPS) with ESMTPS id 3qqk2auq8u-1 (version=TLSv1.2 cipher=ECDHE-RSA-AES256-GCM-SHA384 bits=256 verify=OK); Tue, 23 May 2023 13:46:51 +0000 ARC-Seal: i=1; a=rsa-sha256; s=arcselector9901; d=microsoft.com; cv=none; b=C6wqmeoARKEIPbQGJzcoTzXsr+O42wwubTUrw290FbYqJbfjRTN65V1Rwjygn3oiSKoD9NNQs/F5xq6sfjimNxT2E/7sdvwtVWuNaDSjIIdtg9ita5Iov4VhnnNnTgjSpHS+ZdTkr1DXUBUEKgXKUh49ajpfzrJXLm6gUyMdr3l2aMbIBkZXT80D/BfjYRH/mFDM2gR06rHp8t9rap2iik+4EUkAF9wm69RzIfKcm4RKeMzmnC0kl7xRDQUmQpN0siqtBQW4Kq4hDE0pVeUzThbEg6iicq6Ss++FKHZ6lw7tJktLKiY1q7Q2cYPC7MEhS/3R0MR5FHxFUg9RGMcn/g== 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=bMdioD16BwgetLPc71Xpo1uIYyHFuG/uxMXnxB9Z4fE=; b=iofW4MjsvYrFm5ImyHgchKjm/sJY0/fSm3X2W+jpsRzWEHqYrD4fl8rV4UKPQzG7JQkmwlD4/LwqZUiYfDXjYE/VOjecZynVUAT+Jqn2d4hGD+bZcxtiBG2EflQx371QlbcDki8Pi3YltVrnbiEGYEGPpuJ3ynZ/ug3pbBoDntQF56r8/2692KReEbmD5rZTm5Qm7tHWK5KC1/S11DSwRBNfCRuvBrTSqgs2BMltP/C28SCtyB+12sBI+BvrGtAzwQSoDG0viH2wLHon3xphUwf0Xvr6ptM4i8EhMee0eCRWKzG4MD2qlA2buVomaIwshB5IgSUAvRQzD+tm7aglNQ== 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=bMdioD16BwgetLPc71Xpo1uIYyHFuG/uxMXnxB9Z4fE=; b=SRnk0RM51sZAhS+cnogSPxiR11xw3cP8nAncVD1ay7GmczMU5CGhUhoBonPc89we/pSyyuZVXBbVmrL2nzRv+XzgHU6H1W9mULBE1AcGFCZ4wocdlIikn7BBiS5vEZoBjnShvK9/MG57tc+yOjD8srkVHE0Chsql+v6Bs3lGrqU= Received: from SN6PR10MB3022.namprd10.prod.outlook.com (2603:10b6:805:d8::25) by BY5PR10MB4180.namprd10.prod.outlook.com (2603:10b6:a03:211::9) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id 15.20.6411.29; Tue, 23 May 2023 13:46:49 +0000 Received: from SN6PR10MB3022.namprd10.prod.outlook.com ([fe80::998f:d221:5fb6:c67d]) by SN6PR10MB3022.namprd10.prod.outlook.com ([fe80::998f:d221:5fb6:c67d%7]) with mapi id 15.20.6411.027; Tue, 23 May 2023 13:46:49 +0000 Date: Tue, 23 May 2023 09:46:46 -0400 From: "Liam R. Howlett" To: Thomas Gleixner Cc: LKML , Matthew Wilcox , linux-mm@kvack.org, Shanker Donthineni Subject: Re: your mail Message-ID: <20230523134646.gelsru64qvny3fi7@revolver> Mail-Followup-To: "Liam R. Howlett" , Thomas Gleixner , LKML , Matthew Wilcox , linux-mm@kvack.org, Shanker Donthineni References: <87mt2cxb7y.ffs@tglx> <20230515192708.sypitem5hzycdois@revolver> <875y8r7v1i.ffs@tglx> Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <875y8r7v1i.ffs@tglx> User-Agent: NeoMutt/20220429 X-ClientProxiedBy: YT4P288CA0031.CANP288.PROD.OUTLOOK.COM (2603:10b6:b01:d3::9) To SN6PR10MB3022.namprd10.prod.outlook.com (2603:10b6:805:d8::25) MIME-Version: 1.0 X-MS-PublicTrafficType: Email X-MS-TrafficTypeDiagnostic: SN6PR10MB3022:EE_|BY5PR10MB4180:EE_ X-MS-Office365-Filtering-Correlation-Id: 37bdaa74-2ec9-4140-78af-08db5b942848 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:(13230028)(7916004)(376002)(39860400002)(366004)(346002)(136003)(396003)(451199021)(41300700001)(66556008)(66476007)(66946007)(2906002)(26005)(1076003)(186003)(478600001)(6486002)(316002)(4326008)(6666004)(6916009)(5660300002)(54906003)(6512007)(7116003)(8936002)(8676002)(9686003)(6506007)(83380400001)(86362001)(3480700007)(33716001)(38100700002);DIR:OUT;SFP:1101; X-MS-Exchange-AntiSpam-MessageData-ChunkCount: 1 X-MS-Exchange-AntiSpam-MessageData-0: =?us-ascii?Q?oE8t3QzvgduvTFvKphFBXOZKgAs8ueQYLUhFM92577vuVsXukR0kitWNnXbB?= =?us-ascii?Q?Q+3xWEjdCPsFCLrS6AxfE8t2VW09qP6/YAF4nwANKdukzGzYNYevDkYazsyX?= =?us-ascii?Q?aVUd9FmeYViEPwl0PikpslgFg9fN3xpJh7FjfHXOA88uN8gk4Al0o04jWWcf?= =?us-ascii?Q?i+nVtuVTgFecfjZ19QIdoWrKy/Qht0kTX+lY5KY84AKTFPUqZyH2cnim4GHI?= =?us-ascii?Q?lDirY2J/7wGghHeDyuygak9Lg6eVrG1iesfkmO4ZOvL1/n/DK6x/tNlitlVm?= =?us-ascii?Q?QrZua5afHRnQxZ4CuZfYl8I2crd7yjbd+bjAtfGd0Q661VJeBSWY40CH3M3Z?= =?us-ascii?Q?asU3xRc632FF80mgje6KmIyBYPlfglTzAOrb/OPu/bZ4nd5ECYtd3/i06yCA?= =?us-ascii?Q?Ma/gf3fNy9yHDhznh+mQXlaEt+TUGzwNofc5NCwMomcwXsZi3Ep2f2heMdjS?= =?us-ascii?Q?V65zrMfE4/4hvsG+g1RN1ZkXKUjmctscm7+Zb9bkvYAACZ2lktYCRsv+hiqt?= =?us-ascii?Q?4OmjQa2nJgTXN6GvwKOIisH/rQNZU/YasEls5Ina+nyRe1RsJ4fjnJZMoEEZ?= =?us-ascii?Q?+wZT4byZ1u75AeKonO63Pta7/s6Qg0+FVdsbjDLxV3uzlOTQpHI+PpexMstU?= =?us-ascii?Q?h9QV8y39Kj9PLTHNL4j/lSqNDkeYwZhG7Yz1TRT0dCM2XLmSNv+y2kl2ah16?= =?us-ascii?Q?2CVtMqVi+Gkp3bBhLINMYsPNdAnbvWK2f60JMQ9aBTRpwmWIrDcQ7WM0pjQ3?= =?us-ascii?Q?V+1sJp2o6lQ2A4IVooGxeuYxl952hr39dk1gwcfe00gWu9Kch0IPqjNSOgfM?= =?us-ascii?Q?AU7BuH2hjPtOa8tSyk7k1pV9Y1GX575kkb141Zcz8X5Iev+tJ/oFPFC6RK3K?= =?us-ascii?Q?RxBgNu70Flf/k9no/Cnjpj2uBCY+x8nzDndXYlRm5lQ+P6vYL0XtGlhb1pvi?= =?us-ascii?Q?VIKsFeMNylU+mW4XfP+KHi8Msdue99OlOu0qz+1Zgh7kdwtHQQFWspRRcy23?= =?us-ascii?Q?9Qw4UNZTYokvhORInN21Dl3kp/tB4kFLwfU+ueuBGCrm/ZOr8s1bwHjFax3r?= =?us-ascii?Q?yildSEeIswRfi6qofa+DakbdDOqSt9NDsYH5+I5/e7lQIyAFM4q7unA4nNQa?= =?us-ascii?Q?vg3rO+sNqp7xkK9DN/E7rzwnZzZHNZYzrx7LgYy8z+TlSLR1wrgIDymHHovH?= =?us-ascii?Q?Z+W+sOdzEaK2fo7+D9kqb4rNreeO4KBq3/ox5wAcJrU27eEzzi0hrEQ7AQnq?= =?us-ascii?Q?cFCaVSqTsIeXJTwCIQNP4EWGDzUiMNzQyp92VARhHHfGI4Hmsw0ybvjvTFw2?= =?us-ascii?Q?Re0uchCD4Vn8z6I9JdKzfoA9EztFXaa7tz3HrFKCYUL4nxxhlaBn7vyPSK67?= =?us-ascii?Q?kpGENkUggkmwrKlx5GHSKYo19OZEL0ZeByg6desUmluDEdEAbzunNnqY1p1u?= =?us-ascii?Q?okVAgP4tiKAEagV4W3u0w5jOZ6FsJSTWu9qiyI3WjJ5iCarndXcfmDAQZcJg?= =?us-ascii?Q?ZGtBHXhLjQztnvEK36W6QfaG/Lt4voju+ROQbzEU2+RuWJDdoKfY9CXUs7Jh?= =?us-ascii?Q?imtMFhbXQmbvV87K4OvdR3wPU8XKFO0RqBp1PEivZsaYRwomvtGtusmBtlBb?= =?us-ascii?Q?Vg=3D=3D?= 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: 37bdaa74-2ec9-4140-78af-08db5b942848 X-MS-Exchange-CrossTenant-AuthSource: SN6PR10MB3022.namprd10.prod.outlook.com X-MS-Exchange-CrossTenant-AuthAs: Internal X-MS-Exchange-CrossTenant-OriginalArrivalTime: 23 May 2023 13:46:49.3810 (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: oOCFlOFayXazoBuwO1qit3Z6Nek8AaZHVLxLfTjxlTYSF+GF9agJyb2g0MXRlxU0ggo2Y2OFraRXVZ0aIOUzQQ== X-MS-Exchange-Transport-CrossTenantHeadersStamped: BY5PR10MB4180 X-Proofpoint-Virus-Version: vendor=baseguard engine=ICAP:2.0.254,Aquarius:18.0.957,Hydra:6.0.573,FMLib:17.11.176.26 definitions=2023-05-23_09,2023-05-23_02,2023-05-22_02 X-Proofpoint-Spam-Details: rule=notspam policy=default score=0 malwarescore=0 mlxscore=0 mlxlogscore=410 phishscore=0 bulkscore=0 suspectscore=0 adultscore=0 spamscore=0 classifier=spam adjust=0 reason=mlx scancount=1 engine=8.12.0-2304280000 definitions=main-2305230107 X-Proofpoint-ORIG-GUID: TzRzx1KV93_NBUuYta4zMhOYJ5KRIkoy X-Proofpoint-GUID: TzRzx1KV93_NBUuYta4zMhOYJ5KRIkoy X-Spam-Status: No, score=-2.8 required=5.0 tests=BAYES_00,DKIM_SIGNED, DKIM_VALID,DKIM_VALID_AU,DKIM_VALID_EF,RCVD_IN_DNSWL_LOW,SPF_HELO_NONE, SPF_NONE,T_SCC_BODY_TEXT_LINE autolearn=ham autolearn_force=no version=3.4.6 X-Spam-Checker-Version: SpamAssassin 3.4.6 (2021-04-09) on lindbergh.monkeyblade.net Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org * Thomas Gleixner [230516 18:48]: > On Mon, May 15 2023 at 15:27, Liam R. Howlett wrote: > > * Thomas Gleixner [230510 15:01]: > >> The documentation of mt_next() claims that it starts the search at the > >> provided index. That's incorrect as it starts the search after the provided > >> index. > >> > >> The documentation of mt_find() is slightly confusing. "Handles locking" is > >> not really helpful as it does not explain how the "locking" works. > > > > More locking notes can be found in Documentation/core-api/maple_tree.rst > > which lists mt_find() under the "Takes RCU read lock" list. I'm okay > > with duplicating the comment of taking the RCU read lock in here. > > Without a reference to the actual locking documentation such comments > are not super helpful. Noted. A reference to the larger document should probably be added. Thanks. > > >> Fix similar issues for mt_find_after() and mt_prev(). > >> > >> Remove the completely confusing and pointless "Note: Will not return the > >> zero entry." comment from mt_for_each() and document @__index correctly. > > > > The zero entry concept is an advanced API concept which allows you to > > store something that cannot be seen by the mt_* family of users, so it > > will not be returned and, instead, it will return NULL. Think of it as > > a reservation for an entry that isn't fully initialized. Perhaps it > > should read "Will not return the XA_ZERO_ENTRY" ? > >> > >> - * > >> - * Note: Will not return the zero entry. > > > > This function "will not return the zero entry", meaning it will return > > NULL if xa_is_zero(entry). > > If I understand correctly, this translates to: > > This iterator skips entries, which have been reserved for future use > but have not yet been fully initialized. > > Right? Well, that's one use of using the XA_ZERO_ENTRY, but it's really up to the user to decide why they are adding something that returns NULL in a specific range for the not-advanced API. It might be worth adding the XA_ZERO_ENTRY in here, since that's the only special value right now? > > >> @@ -6487,9 +6493,14 @@ EXPORT_SYMBOL(mtree_destroy); > >> * mt_find() - Search from the start up until an entry is found. > >> * @mt: The maple tree > >> * @index: Pointer which contains the start location of the search > >> - * @max: The maximum value to check > >> + * @max: The maximum value of the search range > >> + * > >> + * Takes RCU read lock internally to protect the search, which does not > >> + * protect the returned pointer after dropping RCU read lock. > >> * > >> - * Handles locking. @index will be incremented to one beyond the range. > >> + * In case that an entry is found @index contains the index of the found > >> + * entry plus one, so it can be used as iterator index to find the next > >> + * entry. > > > > What about: > > "In case that an entry is found @index contains the last index of the > > found entry plus one" > > Still confusing to the casual reader like me :) > > "In case that an entry is found @index is updated to point to the next > possible entry independent whether the found entry is occupying a > single index or a range if indices." > > Hmm? That makes sense to me. Thanks, Liam