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 4CCE3C433EF for ; Thu, 31 Mar 2022 00:31:02 +0000 (UTC) Received: by kanga.kvack.org (Postfix) id BD3DC6B0072; Wed, 30 Mar 2022 20:31:01 -0400 (EDT) Received: by kanga.kvack.org (Postfix, from userid 40) id B83698D0002; Wed, 30 Mar 2022 20:31:01 -0400 (EDT) X-Delivered-To: int-list-linux-mm@kvack.org Received: by kanga.kvack.org (Postfix, from userid 63042) id 9AE818D0001; Wed, 30 Mar 2022 20:31:01 -0400 (EDT) X-Delivered-To: linux-mm@kvack.org Received: from relay.hostedemail.com (relay.hostedemail.com [64.99.140.26]) by kanga.kvack.org (Postfix) with ESMTP id 8C5186B0072 for ; Wed, 30 Mar 2022 20:31:01 -0400 (EDT) Received: from smtpin07.hostedemail.com (a10.router.float.18 [10.200.18.1]) by unirelay11.hostedemail.com (Postfix) with ESMTP id 54EFA8092D for ; Thu, 31 Mar 2022 00:31:01 +0000 (UTC) X-FDA: 79302801522.07.05E4DF5 Received: from mx0a-00082601.pphosted.com (mx0a-00082601.pphosted.com [67.231.145.42]) by imf03.hostedemail.com (Postfix) with ESMTP id 868B620004 for ; Thu, 31 Mar 2022 00:31:00 +0000 (UTC) Received: from pps.filterd (m0109333.ppops.net [127.0.0.1]) by mx0a-00082601.pphosted.com (8.16.1.2/8.16.1.2) with ESMTP id 22UHKYBU006003; Wed, 30 Mar 2022 17:30:42 -0700 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=fb.com; h=from : to : cc : subject : date : message-id : references : in-reply-to : content-type : content-id : content-transfer-encoding : mime-version; s=facebook; bh=Kh29WqFbhvqVECD5EvAbJxPCk6ykQOAJR1vi5RxYJVo=; b=I9cTPkj7Y2nxqMTsxWRbdYLzaxadNfJDZBg0WMPuveGrhy953srqEpJj0JdDvhtgAR3Q mv+xR2HiCIecUHB2CJjoTmV9z5e5o6RY72YxESmKZae4WhbnIFa8NgqBlBN8c9KqzJSw UDIak7Dv14UQjJFmsQ+AHMIxURdA8dPUgk0= Received: from nam11-dm6-obe.outbound.protection.outlook.com (mail-dm6nam11lp2174.outbound.protection.outlook.com [104.47.57.174]) by mx0a-00082601.pphosted.com (PPS) with ESMTPS id 3f4r984j6p-1 (version=TLSv1.2 cipher=ECDHE-RSA-AES256-GCM-SHA384 bits=256 verify=NOT); Wed, 30 Mar 2022 17:30:41 -0700 ARC-Seal: i=1; a=rsa-sha256; s=arcselector9901; d=microsoft.com; cv=none; b=YG62M9/ZcyKzBjzdvME71ON6KkU4DH0Mot+kNvsmgBQCRly3w6ckBSuJuSIbEO7CmeTeRBSJNdwsGFJl8Tvf8Z4HCoZJa9KZjQzXS0vTkquoRucOY6BH7LFNT7DbVZMdHCcMD58Kosn9JQoOguqGGCFhgT1omQxJQaCaVLcK9jt/y5KHPmRZ0bzaL/J6yupqAvE1rSmhpyrAW95fMiQ4W48JDEb6NKzBVF8MP4qsUb3HPAP6pUyPtScG/QoMCmko0vVYySNkQbDOnwQJJozHQsIaUxubwWa7hEcXCoDu9wYDus8C1g2lWnRWah/4n93c1zNmOMX/m5uzNYNLSs773Q== 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=Kh29WqFbhvqVECD5EvAbJxPCk6ykQOAJR1vi5RxYJVo=; b=V0IwMQ6BppEUoyEKdV6yxqn/rfkyML6tMLgVlPkF/f8SU5Pbhnx98VAZ6i9AoiwntK42eRzIHsE1Zg2iaLTReREmepYl0uP3L04E6d8X+YGrwxucgIFkM7cvr9AfTOJJL+15UTseRTs7BfY2myO1MG4Vl3Aeh4IJmFpAUnayh+c3a0AduJAhPQzYwXCwbbdcDTj0PNCl/jMkgUXOnBQdMVEhwDsWFBVW8urI208/QNkQ+gLu50NS4ZKzym1E0lGqpXvw7gON/f6hJrJPTeIyA6oByrkDGkVFABUhOiEcJli5ehYLujgWISgdJXkGd2JHXLUXKfzlZvCq9saz4gCQcA== ARC-Authentication-Results: i=1; mx.microsoft.com 1; spf=pass smtp.mailfrom=fb.com; dmarc=pass action=none header.from=fb.com; dkim=pass header.d=fb.com; arc=none Received: from PH0PR15MB5117.namprd15.prod.outlook.com (2603:10b6:510:c4::8) by SA1PR15MB4840.namprd15.prod.outlook.com (2603:10b6:806:1e3::8) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id 15.20.5102.26; Thu, 31 Mar 2022 00:30:40 +0000 Received: from PH0PR15MB5117.namprd15.prod.outlook.com ([fe80::e487:483c:b214:c999]) by PH0PR15MB5117.namprd15.prod.outlook.com ([fe80::e487:483c:b214:c999%3]) with mapi id 15.20.5123.021; Thu, 31 Mar 2022 00:30:40 +0000 From: Song Liu To: Thomas Gleixner CC: Song Liu , "linux-mm@kvack.org" , "bpf@vger.kernel.org" , "netdev@vger.kernel.org" , "x86@kernel.org" , "ast@kernel.org" , "daniel@iogearbox.net" , "andrii@kernel.org" , Kernel Team , "akpm@linux-foundation.org" , "pmenzel@molgen.mpg.de" , "rick.p.edgecombe@intel.com" Subject: Re: [PATCH bpf 3/4] x86: select HAVE_ARCH_HUGE_VMALLOC_FLAG for X86_64 Thread-Topic: [PATCH bpf 3/4] x86: select HAVE_ARCH_HUGE_VMALLOC_FLAG for X86_64 Thread-Index: AQHYRIo9WDUGkE+Iz0SpJuLdkfmnTKzYmggAgAAJ+4A= Date: Thu, 31 Mar 2022 00:30:39 +0000 Message-ID: <66367845-0FB5-499A-B0E6-93A3209FE1CE@fb.com> References: <20220330225642.1163897-1-song@kernel.org> <20220330225642.1163897-4-song@kernel.org> <87tubfm1wv.ffs@tglx> In-Reply-To: <87tubfm1wv.ffs@tglx> Accept-Language: en-US Content-Language: en-US X-MS-Has-Attach: X-MS-TNEF-Correlator: x-mailer: Apple Mail (2.3693.60.0.1.1) x-ms-publictraffictype: Email x-ms-office365-filtering-correlation-id: 73760ece-1f87-4f0c-b226-08da12adaef4 x-ms-traffictypediagnostic: SA1PR15MB4840:EE_ x-microsoft-antispam-prvs: x-fb-source: Internal 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:PH0PR15MB5117.namprd15.prod.outlook.com;PTR:;CAT:NONE;SFS:(13230001)(366004)(54906003)(2906002)(38070700005)(64756008)(66946007)(66556008)(66446008)(8676002)(8936002)(76116006)(316002)(66476007)(4326008)(38100700002)(122000001)(6916009)(71200400001)(86362001)(5660300002)(6486002)(508600001)(6512007)(83380400001)(2616005)(53546011)(186003)(36756003)(4744005)(7416002)(6506007)(33656002)(14583001)(45980500001);DIR:OUT;SFP:1102; x-ms-exchange-antispam-messagedata-chunkcount: 1 x-ms-exchange-antispam-messagedata-0: =?us-ascii?Q?rAPqznC5etCBB2aBlifnwOhfIhDEM8Um8rSoCI3FecxOSp1qx9ww2BwSstRK?= =?us-ascii?Q?ndRMbHiggNEZEZXSdT0opO/ILANxtAllG9s6d0kGy1KwCNNfwUV1OMFSNSvh?= =?us-ascii?Q?lm0H5Pw6WlsVex9+yRyDGM009aXwXk4gvCj5cUdw84BzvsJsSLjz2W5JAYqR?= =?us-ascii?Q?sAW5DJm0ZoSgHu6VOv8Yy/2WrgdUGi0CHQz1T8wQeVVknTVg9jwkS6UhkAyd?= =?us-ascii?Q?uUoXmHXR85YjAs5im0vZohyXprBDvZj6lnrfyupnr+pjUObmW5Hqc6LJM7SH?= =?us-ascii?Q?0GGv+S+lvFZzKHT3IJqklufbr4Pl9ARNyOEqdtGgFDfyZUgHxGd2b5lHUAuz?= =?us-ascii?Q?WPLu5Tm3/ippgYBE7TgLksvsFJSLD7zP1/R06YsD1Qe6juZE8IV6PTRiHbab?= =?us-ascii?Q?UL7kLgjEKpwRJVXQa4riUnN46t7I1zk9ewj6HjoqtqaqKF32OU4qwK9gnrQa?= =?us-ascii?Q?l6ptxeTWvtDg45G4CGdY6+LfCSWtNPj5aODghz8M5nAPkelQzWznT6NmEpQo?= =?us-ascii?Q?WpUNZETzKwvnZKuwN+rkAvjGHFPCqWktP5GB3Ck9DXBfxDA+q0EU2HJ7qcah?= =?us-ascii?Q?De1Z0saj4rtx0F37NWgfnKI/eVzE2P/ax+bxWNEhv1hIpK+yBOZusEB5ohel?= =?us-ascii?Q?krJuseg5OuEBGWmKJ6JOQADxRIdtqDvWw5bJr5ecqUYPcdibpjcf41dHVJV3?= =?us-ascii?Q?IY5lWDKg5gFFbwuZ5ew7fpxz/62UlHx6+vjXhHjIn0g6INxXINGrPmPlkoWz?= =?us-ascii?Q?5n338vEcxCH0aQfV3g3FNG1oQ28V53GQ46zWD73YYBFvYoTO5QtmyeIjNhXh?= =?us-ascii?Q?ZkIoS3yusBEt9gn0wsFXDkLHWe25FOrmWSDOBrEeehisoK/HcZIHlVjpBCuW?= =?us-ascii?Q?IQomB8sKxh9TAKHhp5dKQ7+wF0D4HyMF8XM4HALJ0d/CfhFd4Kzjl0n3hMJg?= =?us-ascii?Q?RTgVpSG2JRpnhuKxSDyqQJoETUnwg+c8S5ZV5YSAigaNezeTt7ldVfRGxcu8?= =?us-ascii?Q?cE692ZbHHx1qk0Ox1mB31+IR44sAaRosHYLFW2uQtgufFG/aQ0M4k1op/sRI?= =?us-ascii?Q?cg/5fk37uy8bM6olVrPcZd/qYra6n22y/iuQk/4PvDnnbAGwQMVLa8crd9jh?= =?us-ascii?Q?ql039eOdfbvxyHDe3PYVBvAmqm2iZMSVLf2c04DtyTdlIHfpziaQAlS76AqV?= =?us-ascii?Q?5Io1Ryn5eqRrfFQfsTw2TxPdfd+NxnTALOlpZKBl4C0io/amXZRYMlx46K+9?= =?us-ascii?Q?t3vFPAPGxRBtujfDc/18BHbAZGYEvcZHeaHR34PQ2MxphRl7eGhgpFPZApAY?= =?us-ascii?Q?C7ulV08Y6g71fmx+8NBjDhtaIRXu7bb5panveLext9SbQCRMqvp4V1jcV8K1?= =?us-ascii?Q?xbuwoe0/I69S+3cBsdfazxqO1ySDHS9L2PQ39tdprPBSeCcP3nG25NzxmHOw?= =?us-ascii?Q?HPVEXGOq8RVb3o9tPa1z+Em/5+HhZKoxzYAtuQOtRS5OiCCF6bQiD9cWNCKh?= =?us-ascii?Q?DIWGWl/fwQKWa6Bz5NMGpZYvW7F3+c3tpb+kSRDkirvy2A9hbE/HuCAEj8VI?= =?us-ascii?Q?Ic/LWRG8g3B95wnb1kpvhS/tQJ54QBaJ10tquCLaR+UcPXBEanCUK6ftkdS3?= =?us-ascii?Q?xHBy03UQxgOfxDKcuT+o7zffNVPzNlS7XYlWb0asYE7WB1HWAjmdo0sB9i7z?= =?us-ascii?Q?/gdsk7U+X6DdZ65eCrTxXe7wZspGpk2gxUNkRmdZPLWNLRpj3FZ8pJA5An+I?= =?us-ascii?Q?phwn/TVDEhZmIU0WRvGrht6ylaC8Syf/qRHOfuMWNoJ4vjStOO1k?= Content-Type: text/plain; charset="us-ascii" Content-ID: Content-Transfer-Encoding: quoted-printable MIME-Version: 1.0 X-OriginatorOrg: fb.com X-MS-Exchange-CrossTenant-AuthAs: Internal X-MS-Exchange-CrossTenant-AuthSource: PH0PR15MB5117.namprd15.prod.outlook.com X-MS-Exchange-CrossTenant-Network-Message-Id: 73760ece-1f87-4f0c-b226-08da12adaef4 X-MS-Exchange-CrossTenant-originalarrivaltime: 31 Mar 2022 00:30:39.9167 (UTC) X-MS-Exchange-CrossTenant-fromentityheader: Hosted X-MS-Exchange-CrossTenant-id: 8ae927fe-1255-47a7-a2af-5f3a069daaa2 X-MS-Exchange-CrossTenant-mailboxtype: HOSTED X-MS-Exchange-CrossTenant-userprincipalname: Xv6WPr8S32NazzZHD7ZKLRABz+CePv708Sbv0zTtPHe7yhDXrVU++OVlOjOQ3bOymyeBoZFUJ8CNrnFDir+hfw== X-MS-Exchange-Transport-CrossTenantHeadersStamped: SA1PR15MB4840 X-Proofpoint-ORIG-GUID: VamlgDWZ2PAi2EjedPSitHWIQlVsOxUK X-Proofpoint-GUID: VamlgDWZ2PAi2EjedPSitHWIQlVsOxUK X-Proofpoint-Virus-Version: vendor=baseguard engine=ICAP:2.0.205,Aquarius:18.0.850,Hydra:6.0.425,FMLib:17.11.64.514 definitions=2022-03-30_06,2022-03-30_01,2022-02-23_01 X-Stat-Signature: 4eq5sshhi4g9s1hi7i5uoxojzhgad7n8 Authentication-Results: imf03.hostedemail.com; dkim=pass header.d=fb.com header.s=facebook header.b=I9cTPkj7; spf=none (imf03.hostedemail.com: domain of "prvs=5089574f48=songliubraving@fb.com" has no SPF policy when checking 67.231.145.42) smtp.mailfrom="prvs=5089574f48=songliubraving@fb.com"; dmarc=pass (policy=reject) header.from=fb.com X-Rspam-User: X-Rspamd-Server: rspam02 X-Rspamd-Queue-Id: 868B620004 X-HE-Tag: 1648686660-130265 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 Mar 30, 2022, at 4:54 PM, Thomas Gleixner wrote: >=20 > On Wed, Mar 30 2022 at 15:56, Song Liu wrote: >> As HAVE_ARCH_HUGE_VMALLOC is not ready for X86_64, enable >> HAVE_ARCH_HUGE_VMALLOC_FLAG to allow bpf_prog_pack to allocate huge >> pages. >=20 > Despite HAVE_ARCH_HUGE_VMALLOC being not ready for X86_64 enable it > nevertheless? These are two different flags: HAVE_ARCH_HUGE_VMALLOC allows vmalloc to try to allocate huge pages for size >=3D PMD_SIZE, unless it is disabled with nohugeiomap or VM_NO_HUGE_VM= AP. HAVE_ARCH_HUGE_VMALLOC_FLAG allows vmalloc to try to allocate huge pages for size >=3D PMD_SIZE, only when the user specifies VM_TRY_HUGE_VMAP.=20 Recommendations for better naming will be highly appreciated.. Song >=20 > I assume you wanted to say something like this: >=20 > The shortcomings of huge vmalloc allocations have been fixed in the > memory management core code, so reenable HAVE_ARCH_HUGE_VMALLOC. >=20 > Thanks, >=20 > tglx