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=-1.1 required=3.0 tests=DKIMWL_WL_HIGH,DKIMWL_WL_MED, DKIM_SIGNED,DKIM_VALID,DKIM_VALID_AU,HEADER_FROM_DIFFERENT_DOMAINS, MAILING_LIST_MULTI,SPF_PASS 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 E2646C43381 for ; Wed, 13 Mar 2019 18:26:13 +0000 (UTC) Received: from kanga.kvack.org (kanga.kvack.org [205.233.56.17]) by mail.kernel.org (Postfix) with ESMTP id 96B1121019 for ; Wed, 13 Mar 2019 18:26:13 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (1024-bit key) header.d=fb.com header.i=@fb.com header.b="mziFIS8O"; dkim=pass (1024-bit key) header.d=fb.onmicrosoft.com header.i=@fb.onmicrosoft.com header.b="B0BG1qry" DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org 96B1121019 Authentication-Results: mail.kernel.org; dmarc=fail (p=none dis=none) header.from=fb.com Authentication-Results: mail.kernel.org; spf=pass smtp.mailfrom=owner-linux-mm@kvack.org Received: by kanga.kvack.org (Postfix) id 3DE4E8E0003; Wed, 13 Mar 2019 14:26:13 -0400 (EDT) Received: by kanga.kvack.org (Postfix, from userid 40) id 39B338E0001; Wed, 13 Mar 2019 14:26:13 -0400 (EDT) X-Delivered-To: int-list-linux-mm@kvack.org Received: by kanga.kvack.org (Postfix, from userid 63042) id 230B08E0003; Wed, 13 Mar 2019 14:26:13 -0400 (EDT) X-Delivered-To: linux-mm@kvack.org Received: from mail-pf1-f197.google.com (mail-pf1-f197.google.com [209.85.210.197]) by kanga.kvack.org (Postfix) with ESMTP id D963B8E0001 for ; Wed, 13 Mar 2019 14:26:12 -0400 (EDT) Received: by mail-pf1-f197.google.com with SMTP id u19so3103762pfn.1 for ; Wed, 13 Mar 2019 11:26:12 -0700 (PDT) X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:dkim-signature:dkim-signature:from:to:cc:subject :thread-topic:thread-index:date:message-id:references:in-reply-to :accept-language:content-language:content-id :content-transfer-encoding:mime-version; bh=ud6/U5sLaNyQXgEDX4pHtMm5ih1hKxAeLoRbN2lxZms=; b=BslmPGCO67qmGLorlmQx8kpv3RB9h744u5j1iuNIDZdmGH489gdNkXUv/ZqgBkrhJc xTOApA6X9/HpBRS8B3ygh5yG9QK4JiMEzlc85wbaG88a00wnIl+5FPhVcUYvTT3cKlpJ AkgSaqu5a5BHu4WSal6Jxf52RxQ6RbEVkY8cdFUivtzos0zeGh1FyH//Q0AYecsJDoA1 Zzd3A2TRso/9NmDcJkoPTDJW7YJH3auOE9xtKPMBIuwxJ7u8MLFvk4b9HzhYBNLZ3iSE uwDZp3SAAjirWblaMRITh9JC/YFhnjU1HV1EH16uOWrkFtprwTA/VwUaE3blK+ThRjk0 Cg3A== X-Gm-Message-State: APjAAAW3YaJH+kqrPo9NsvcXjZbAtjh583G5emrbQSAEUIhXTgcsooeb 9m6bGlA4Lr72GjB8oz+AEqwIGLtS/YrGacHWlGDVD27KZ0iCeczvTMgkvaMrDHutk2OkDxiWwys TM+gE/PLdT98EeTKw55OovpICHFyjoxRwXzqP/e+mfNbeCvseUPioKFZnwUjA90jh1A== X-Received: by 2002:aa7:81c5:: with SMTP id c5mr46493930pfn.217.1552501572458; Wed, 13 Mar 2019 11:26:12 -0700 (PDT) X-Google-Smtp-Source: APXvYqxANCCqmR8bYIrdYdnIqdMGdNHBRIwXcAFiy8fOAxpAt+sYMPFdKP467G6RnZG1MaBZXzZR X-Received: by 2002:aa7:81c5:: with SMTP id c5mr46493884pfn.217.1552501571625; Wed, 13 Mar 2019 11:26:11 -0700 (PDT) ARC-Seal: i=1; a=rsa-sha256; t=1552501571; cv=none; d=google.com; s=arc-20160816; b=Vug+2DN5X5e+XkS1edqsNU12wxKNmfh/PxY+X5QKp1qmdbR6MYlU9PODRErgm9JUuS KDrWmGCBQOjlptjtWktka1134SrAiZ56mG6vRsZk26c1O/CV+lmTZmAGZ4WPKOKKJGa5 gFtyaRDWW6O5RKJSlwYwPoUKPDgpiiJ96B3t6Wnv0UTQks87BSK4ol8edUJdOsOQYopz arqC3qJiX6BE7UdLa1i85uiAlNp2mvMItwOHDSSsb1wIFg/5GhX6KlQCVWnZXUtPsDat TDLygG+wYsYudJTjsX6xlwBbEutToHupdKmk8plapUq3h1gm7TxI31uM5+vgeUIR2x7q /IDg== ARC-Message-Signature: i=1; a=rsa-sha256; c=relaxed/relaxed; d=google.com; s=arc-20160816; h=mime-version:content-transfer-encoding:content-id:content-language :accept-language:in-reply-to:references:message-id:date:thread-index :thread-topic:subject:cc:to:from:dkim-signature:dkim-signature; bh=ud6/U5sLaNyQXgEDX4pHtMm5ih1hKxAeLoRbN2lxZms=; b=H4pyNn1MS+4D6PAebP8HqsWjqbU1jf09qNEBIky4e2+Mi1hqDZyZHGO///DXBevOcP AZ2qOt65xDl/athLRIQeL5rQtdLgm8iBVDODPWa03bYFCY1aOi4eOFWn/90aeFn2B7AG BiJDgktq+hUgFeF3t8f2nkkrK1x/FZfYaUKe4YxQwUbIoBudiym3cYbV4WO/ASztAZv0 OUbq8EHmqtcglUmcAaeeD1046OfS2fFY31pqE08GFwRzT2JQafHebVXPsDIvv+pJgXOj ocndbBaJW97ZHgNrCkUoJghKoQYpbRpsO7knRDGvZTJ4AqEmCSY6i1ysxCvpYTKUqLJx FVBQ== ARC-Authentication-Results: i=1; mx.google.com; dkim=pass header.i=@fb.com header.s=facebook header.b=mziFIS8O; dkim=pass header.i=@fb.onmicrosoft.com header.s=selector1-fb-com header.b=B0BG1qry; spf=pass (google.com: domain of prvs=8975a33d68=guro@fb.com designates 67.231.145.42 as permitted sender) smtp.mailfrom="prvs=8975a33d68=guro@fb.com"; dmarc=pass (p=NONE sp=NONE dis=NONE) header.from=fb.com Received: from mx0a-00082601.pphosted.com (mx0a-00082601.pphosted.com. [67.231.145.42]) by mx.google.com with ESMTPS id n1si10260712pgv.545.2019.03.13.11.26.11 for (version=TLS1_2 cipher=ECDHE-RSA-AES128-GCM-SHA256 bits=128/128); Wed, 13 Mar 2019 11:26:11 -0700 (PDT) Received-SPF: pass (google.com: domain of prvs=8975a33d68=guro@fb.com designates 67.231.145.42 as permitted sender) client-ip=67.231.145.42; Authentication-Results: mx.google.com; dkim=pass header.i=@fb.com header.s=facebook header.b=mziFIS8O; dkim=pass header.i=@fb.onmicrosoft.com header.s=selector1-fb-com header.b=B0BG1qry; spf=pass (google.com: domain of prvs=8975a33d68=guro@fb.com designates 67.231.145.42 as permitted sender) smtp.mailfrom="prvs=8975a33d68=guro@fb.com"; dmarc=pass (p=NONE sp=NONE dis=NONE) header.from=fb.com Received: from pps.filterd (m0109333.ppops.net [127.0.0.1]) by mx0a-00082601.pphosted.com (8.16.0.27/8.16.0.27) with SMTP id x2DIJp60006331; Wed, 13 Mar 2019 11:26:09 -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=ud6/U5sLaNyQXgEDX4pHtMm5ih1hKxAeLoRbN2lxZms=; b=mziFIS8OmcB2Is91py7AUWN/UQz/Ls1qbwNhOrXSSsvF7DDruapGvastyLrSznxvm546 yZRl/JHVjpWDgmR46CCVDi8S1Mk+x/icnHhB1e+lYa2BBkc7V8rpUU60bBSrhStn4YQ4 8m7ZSKZmOknxa9KDASU8fwppT2LybCnBhF4= Received: from mail.thefacebook.com ([199.201.64.23]) by mx0a-00082601.pphosted.com with ESMTP id 2r771wg1js-11 (version=TLSv1.2 cipher=ECDHE-RSA-AES256-SHA384 bits=256 verify=NOT); Wed, 13 Mar 2019 11:26:09 -0700 Received: from prn-mbx03.TheFacebook.com (2620:10d:c081:6::17) by prn-hub02.TheFacebook.com (2620:10d:c081:35::126) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_CBC_SHA384) id 15.1.1713.5; Wed, 13 Mar 2019 11:23:53 -0700 Received: from prn-hub05.TheFacebook.com (2620:10d:c081:35::129) by prn-mbx03.TheFacebook.com (2620:10d:c081:6::17) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_CBC_SHA384) id 15.1.1713.5; Wed, 13 Mar 2019 11:23:53 -0700 Received: from NAM01-BY2-obe.outbound.protection.outlook.com (192.168.54.28) by o365-in.thefacebook.com (192.168.16.29) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_CBC_SHA384) id 15.1.1713.5 via Frontend Transport; Wed, 13 Mar 2019 11:23:53 -0700 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=fb.onmicrosoft.com; s=selector1-fb-com; h=From:Date:Subject:Message-ID:Content-Type:MIME-Version:X-MS-Exchange-SenderADCheck; bh=ud6/U5sLaNyQXgEDX4pHtMm5ih1hKxAeLoRbN2lxZms=; b=B0BG1qryZKvLbkk6UtpBeut4ET96MlB4oTZu5rak8GF5wTZ5mcyoyWdNktcyf2timix7VwAiEVaQgJP9GuifI5MV24UhRBujxyLL68icPybzbN+Ssc0hTeLLfRQ022LO4t6KKBcIgSfwUvSz48ftxSsSFOKI+cXNu8TgiYZDGBw= Received: from BYAPR15MB2631.namprd15.prod.outlook.com (20.179.156.24) by BYAPR15MB3192.namprd15.prod.outlook.com (20.179.56.94) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id 15.20.1709.13; Wed, 13 Mar 2019 18:23:35 +0000 Received: from BYAPR15MB2631.namprd15.prod.outlook.com ([fe80::790e:7294:b086:9ded]) by BYAPR15MB2631.namprd15.prod.outlook.com ([fe80::790e:7294:b086:9ded%2]) with mapi id 15.20.1686.021; Wed, 13 Mar 2019 18:23:35 +0000 From: Roman Gushchin To: Johannes Weiner CC: Roman Gushchin , "linux-mm@kvack.org" , Kernel Team , "linux-kernel@vger.kernel.org" , Tejun Heo , Rik van Riel , Michal Hocko Subject: Re: [PATCH v2 6/6] mm: refactor memcg_hotplug_cpu_dead() to use memcg_flush_offline_percpu() Thread-Topic: [PATCH v2 6/6] mm: refactor memcg_hotplug_cpu_dead() to use memcg_flush_offline_percpu() Thread-Index: AQHU2SPHfXxtM9jIQ0KuYqpravz+paYJu4eAgAAl6oA= Date: Wed, 13 Mar 2019 18:23:35 +0000 Message-ID: <20190313182330.GB7336@castle.DHCP.thefacebook.com> References: <20190312223404.28665-1-guro@fb.com> <20190312223404.28665-8-guro@fb.com> <20190313160749.GB31891@cmpxchg.org> In-Reply-To: <20190313160749.GB31891@cmpxchg.org> Accept-Language: en-US Content-Language: en-US X-MS-Has-Attach: X-MS-TNEF-Correlator: x-clientproxiedby: MWHPR06CA0024.namprd06.prod.outlook.com (2603:10b6:301:39::37) To BYAPR15MB2631.namprd15.prod.outlook.com (2603:10b6:a03:152::24) x-ms-exchange-messagesentrepresentingtype: 1 x-originating-ip: [2620:10d:c090:180::f5e6] x-ms-publictraffictype: Email x-ms-office365-filtering-correlation-id: 078580ba-439e-4445-d3d0-08d6a7e1018c x-microsoft-antispam: BCL:0;PCL:0;RULEID:(2390118)(7020095)(4652040)(8989299)(4534185)(4627221)(201703031133081)(201702281549075)(8990200)(5600127)(711020)(4605104)(2017052603328)(7153060)(7193020);SRVR:BYAPR15MB3192; x-ms-traffictypediagnostic: BYAPR15MB3192: x-microsoft-antispam-prvs: x-forefront-prvs: 09752BC779 x-forefront-antispam-report: SFV:NSPM;SFS:(10019020)(376002)(39860400002)(366004)(136003)(396003)(346002)(189003)(199004)(1076003)(6116002)(4744005)(6486002)(256004)(86362001)(316002)(6246003)(7736002)(305945005)(5660300002)(186003)(25786009)(229853002)(52116002)(4326008)(386003)(9686003)(6506007)(76176011)(6916009)(102836004)(81156014)(6436002)(71190400001)(478600001)(53936002)(8676002)(99286004)(97736004)(8936002)(446003)(46003)(14454004)(105586002)(106356001)(476003)(33656002)(11346002)(486006)(6512007)(81166006)(68736007)(2906002)(54906003)(71200400001);DIR:OUT;SFP:1102;SCL:1;SRVR:BYAPR15MB3192;H:BYAPR15MB2631.namprd15.prod.outlook.com;FPR:;SPF:None;LANG:en;PTR:InfoNoRecords;MX:1;A:1; received-spf: None (protection.outlook.com: fb.com does not designate permitted sender hosts) x-ms-exchange-senderadcheck: 1 x-microsoft-antispam-message-info: W4ZXKtGqonpn34CApX3WoIFNatmGsbukFbmxlANWRngoEECNmSisUrnXJIgSu8EmHqLF5ewi4pj3btJZCN6eS5PhhH/Vyl+QcUC0TfKuri+F6ryrEP4RL2lLlA40LIQtkS914W0Hn23QTUyLTHuB3PEe2YIIwtz8Reqz7EnKf0KBGgUuWMDc6hIp2dcGQekvn3eABJLPYT4zdY/hFlusj8k8bIsqf3WHQ98JaDngosO//ZJydinyGS3ZUsAJxVQALbX4u6LLAozXZ09WBSI3da0FCviiwolu8gn/eekKyG6xcy7Y7CRjE70ox8UcJDvW0ZBzO8YvOa7G5vC1K+lz3fn6vc6qxBW+T6jrEAjY2+TdL7dTF/P0Frtc7WwEoDRrLuLekcQsRPK4eTKS3C+7vPOV4xmT2+yIaKWycLuzwLU= Content-Type: text/plain; charset="us-ascii" Content-ID: <65B672453086894D9C2E74DC37F97FB3@namprd15.prod.outlook.com> Content-Transfer-Encoding: quoted-printable MIME-Version: 1.0 X-MS-Exchange-CrossTenant-Network-Message-Id: 078580ba-439e-4445-d3d0-08d6a7e1018c X-MS-Exchange-CrossTenant-originalarrivaltime: 13 Mar 2019 18:23:35.7732 (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-Transport-CrossTenantHeadersStamped: BYAPR15MB3192 X-OriginatorOrg: fb.com X-Proofpoint-Virus-Version: vendor=fsecure engine=2.50.10434:,, definitions=2019-03-13_11:,, signatures=0 X-Proofpoint-Spam-Reason: safe X-FB-Internal: Safe 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 Wed, Mar 13, 2019 at 12:07:49PM -0400, Johannes Weiner wrote: > On Tue, Mar 12, 2019 at 03:34:04PM -0700, Roman Gushchin wrote: > > @@ -2180,50 +2179,8 @@ static int memcg_hotplug_cpu_dead(unsigned int c= pu) > > + for_each_mem_cgroup(memcg) > > + memcg_flush_offline_percpu(memcg, get_cpu_mask(cpu)); >=20 > cpumask_of(cpu) is the official API function, with kerneldoc and > everything. I think get_cpu_mask() is just an implementation helper. >=20 > [hannes@computer linux]$ git grep cpumask_of | wc -l > 400 > [hannes@computer linux]$ git grep get_cpu_mask | wc -l > 20 >=20 > Otherwise, looks good to me! Fixed in v3. Thank you!