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=-4.2 required=3.0 tests=DKIMWL_WL_HIGH,DKIM_SIGNED, DKIM_VALID,DKIM_VALID_AU,HEADER_FROM_DIFFERENT_DOMAINS,MAILING_LIST_MULTI, SIGNED_OFF_BY,SPF_PASS 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 5F633C282D7 for ; Mon, 11 Feb 2019 13:59:31 +0000 (UTC) Received: from kanga.kvack.org (kanga.kvack.org [205.233.56.17]) by mail.kernel.org (Postfix) with ESMTP id 04325222B0 for ; Mon, 11 Feb 2019 13:59:30 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (1024-bit key) header.d=oneplus.com header.i=@oneplus.com header.b="K37Akkwh" DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org 04325222B0 Authentication-Results: mail.kernel.org; dmarc=fail (p=quarantine dis=none) header.from=oneplus.com Authentication-Results: mail.kernel.org; spf=pass smtp.mailfrom=owner-linux-mm@kvack.org Received: by kanga.kvack.org (Postfix) id 8BB298E00E7; Mon, 11 Feb 2019 08:59:30 -0500 (EST) Received: by kanga.kvack.org (Postfix, from userid 40) id 86D0D8E00C3; Mon, 11 Feb 2019 08:59:30 -0500 (EST) X-Delivered-To: int-list-linux-mm@kvack.org Received: by kanga.kvack.org (Postfix, from userid 63042) id 735308E00E7; Mon, 11 Feb 2019 08:59:30 -0500 (EST) X-Delivered-To: linux-mm@kvack.org Received: from mail-yw1-f71.google.com (mail-yw1-f71.google.com [209.85.161.71]) by kanga.kvack.org (Postfix) with ESMTP id 465248E00C3 for ; Mon, 11 Feb 2019 08:59:30 -0500 (EST) Received: by mail-yw1-f71.google.com with SMTP id c67so7846457ywe.5 for ; Mon, 11 Feb 2019 05:59:30 -0800 (PST) X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state: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=plqnq+mHjOEE737ALXRa4tmLV3eyhKjFtL2auSVXIPk=; b=DXag17QANjY5tVuM1wWMeM1/GamvE4bZLOyJ2xHkoLrriXqdFH850VqzxGrB+UxLDl Ol65APtTgG6LeH0TXrsF/hlYzv7MPE04dzCCn1/+JcV4zJubTSh3dLPLECYhRWeSsf/E TrWx0jQqQfn6eVr+qfUGdwEDJaKf1JOyjh5gUunLlIR08R0Rs1iCIYR6iciJlcXQyaZB kJv0eMFO+tXqSK/zulh3Ec7VbqX7DSTkuEDVnFeW6U8DSLsGAFK8n4yu3k4e+dKWmR0E m9zjWEEhiLC2URnAAWXPpq3qVzB22p3oZ3gMvqefmtRDagNF5Q7qjS1Nn1bDD0Wp13gl E53A== X-Gm-Message-State: AHQUAuZGBbTXqk7ads1bla6dnpBevPLFmD1BqJroGSlQzRD2qscn/yDM dOUQIymS0EEazqbq7SnoygwyAfj6wJZ131Q6RZLH8/7EQ4EQc38qP7VonXHlGa9YP+aEJwZdDc+ DTyQ3j9s9GLqbsWPUEjVYco0JwyBZpNgW60ydhw0pVWy09Q+TgQPeRMj8NYJ6CVw0lg== X-Received: by 2002:a25:804b:: with SMTP id a11mr27351265ybn.342.1549893569864; Mon, 11 Feb 2019 05:59:29 -0800 (PST) X-Google-Smtp-Source: AHgI3IZPi7UWxnrII1m4BUPXXnYDA2Vv92W9HJ3xfG1ECk0P3uDDcGSBSFJh1SP0l6q4SG3No7c4 X-Received: by 2002:a25:804b:: with SMTP id a11mr27351231ybn.342.1549893569183; Mon, 11 Feb 2019 05:59:29 -0800 (PST) ARC-Seal: i=1; a=rsa-sha256; t=1549893569; cv=none; d=google.com; s=arc-20160816; b=ELnUsjfQJ08cVn/0AG9Dcdy0zxn0BgA2SbSxN7S04N7E/4paJWDvBKDD7SXBWm/AJ3 n4VJ5CZIAxNtlTYu26xBpvV5kIIkox1CDXb28pkq6GawZTwxtfcJTo34qjftG6VQtfjk OEG3oaQaXqR7KKQMmIhH/TbXU1W91FFGYG90upAsfetWV2jWDfCLRkSb3TMRMXWDd8Bv PDYuHESMCKutIgmIX7j2QFycci295QGMq9YGMLGakS1ZfDbfpeVA3EcCKNiNvkgUWrMJ upa/XtGweYheNBpv+YBKzaVxfSke/oeaXXYURySPICLSZnXRjE8rOVPXZKdYYnJg/qYL RZJg== 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; bh=plqnq+mHjOEE737ALXRa4tmLV3eyhKjFtL2auSVXIPk=; b=TpLfLzJqy30jUQHi0vW8tX+Vt6y94SNxDH43SmpHls3r5fShLduviM4CmQKJkykjw8 N4c5ufskN5nD0zpsGX3lPTDqXJw06F2G7E4eJ9/xoHWVm2fayWyvx5L0kM6hNCKnLX4a fBCmted3BegVCaMFFpOxRk508Fspvrs/5y1Ue1mqC1SUy2L8LScf1yhfXt/UE8ld9nic m2gT7agdWc0DkOjpYllI/D1SKhc0ghaXLioso3g1l78TjXGcChj+R3CsFSMRb1A22cdC 7BwXVf8/5bJS5oWV/sMVbL1NOyhbBCm53W3cV0lRN25t7u1Fa/zQdy3yGy7w0NMJz2Mt Y77w== ARC-Authentication-Results: i=1; mx.google.com; dkim=pass header.i=@oneplus.com header.s=selector1 header.b=K37Akkwh; spf=pass (google.com: domain of linux.upstream@oneplus.com designates 40.107.129.118 as permitted sender) smtp.mailfrom=linux.upstream@oneplus.com; dmarc=pass (p=QUARANTINE sp=QUARANTINE dis=NONE) header.from=oneplus.com Received: from KOR01-SL2-obe.outbound.protection.outlook.com (mail-eopbgr1290118.outbound.protection.outlook.com. [40.107.129.118]) by mx.google.com with ESMTPS id e185si6111110ywd.55.2019.02.11.05.59.28 for (version=TLS1_2 cipher=ECDHE-RSA-AES128-GCM-SHA256 bits=128/128); Mon, 11 Feb 2019 05:59:29 -0800 (PST) Received-SPF: pass (google.com: domain of linux.upstream@oneplus.com designates 40.107.129.118 as permitted sender) client-ip=40.107.129.118; Authentication-Results: mx.google.com; dkim=pass header.i=@oneplus.com header.s=selector1 header.b=K37Akkwh; spf=pass (google.com: domain of linux.upstream@oneplus.com designates 40.107.129.118 as permitted sender) smtp.mailfrom=linux.upstream@oneplus.com; dmarc=pass (p=QUARANTINE sp=QUARANTINE dis=NONE) header.from=oneplus.com DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=oneplus.com; s=selector1; h=From:Date:Subject:Message-ID:Content-Type:MIME-Version:X-MS-Exchange-SenderADCheck; bh=plqnq+mHjOEE737ALXRa4tmLV3eyhKjFtL2auSVXIPk=; b=K37Akkwh8COFc7+GIlHcBEP/fg/qQu8WHVF4qEalRqTWxoYGYoTsG1GPqyaJuoZQVL/bXA9p5ag+h4JjcrEBckUo0rcudprcAUbetnea0KHSZP1u8lQbf8R9SRKJ1FQX8au/8+nwODqsI54ss4iwjr4aBqBWDKnIbmyIEqQ7WJ4= Received: from SL2PR04MB3436.apcprd04.prod.outlook.com (20.177.176.85) by SL2PR04MB3049.apcprd04.prod.outlook.com (20.177.176.143) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id 15.20.1601.22; Mon, 11 Feb 2019 13:59:25 +0000 Received: from SL2PR04MB3436.apcprd04.prod.outlook.com ([fe80::3437:6e26:53e1:ce17]) by SL2PR04MB3436.apcprd04.prod.outlook.com ([fe80::3437:6e26:53e1:ce17%3]) with mapi id 15.20.1601.023; Mon, 11 Feb 2019 13:59:25 +0000 From: Linux Upstream To: Peter Zijlstra , Chintan Pandya CC: "hughd@google.com" , "jack@suse.cz" , "mawilcox@microsoft.com" , "akpm@linux-foundation.org" , "linux-kernel@vger.kernel.org" , "linux-mm@kvack.org" Subject: Re: [RFC 1/2] page-flags: Make page lock operation atomic Thread-Topic: [RFC 1/2] page-flags: Make page lock operation atomic Thread-Index: AQHUwgjYvQYyD7epEke+PT1qeXbKpaXanDWAgAADsoA= Date: Mon, 11 Feb 2019 13:59:24 +0000 Message-ID: <364c7595-14f5-7160-d076-35a14c90375a@oneplus.com> References: <20190211125337.16099-1-chintan.pandya@oneplus.com> <20190211125337.16099-2-chintan.pandya@oneplus.com> <20190211134607.GA32511@hirez.programming.kicks-ass.net> In-Reply-To: <20190211134607.GA32511@hirez.programming.kicks-ass.net> Accept-Language: en-US Content-Language: en-US X-MS-Has-Attach: X-MS-TNEF-Correlator: x-clientproxiedby: SG2PR06CA0165.apcprd06.prod.outlook.com (2603:1096:1:1e::19) To SL2PR04MB3436.apcprd04.prod.outlook.com (2603:1096:100:39::21) authentication-results: spf=none (sender IP is ) smtp.mailfrom=linux.upstream@oneplus.com; x-ms-exchange-messagesentrepresentingtype: 1 x-originating-ip: [14.143.173.238] x-ms-publictraffictype: Email x-microsoft-exchange-diagnostics: 1;SL2PR04MB3049;6:1qN0WnjHrEkriMVMKZD5rWG5LpGmr5pM2VXoOMZZrCoiLP4RdM+fU9L/YYJjTdhwH9EUzbrf+6V+5TMoROi2HWwRCIPr2CqeDcVVAElKNZorceuuiJDyyx4yQQthkvljo/SPRtsCXbmMQZR3HZVv7wXMJvB4wx8/pQytGKnXFbG0i+m7ZpsgBNToo0DEMyNekr3ox21FVNEaJwgH2Pvx3EiShsVY9NG7rR/sjlKPBgXAc8uSkMALVE4QLBbIQlRTT4txoA0K1rwh3OI/zoGht698bA8mRpG4SLeLWKnCId4nBFlHqjW+iJOqbiY30OmbbhtAfy5nTDHexWz+MwOIfWJp8znqaHxUrHtSZmR0WaG5O/QBYMKl0gvkK4S69u5A1LJR0Z0pUXcI2jmT6rk1M6n27130FA7taYQJp+ZI4qx/C2hu5pZ85FeNt6rzgOJl1C155D5Lb8IyxOIowz0lMA==;5:iQSycRwFQ12KETy3DsaBGYp4U8Bt5okQHKpnDeu8p0C0FTfYyBMV0fk7Qgqk07pnLwXO4Q0bqc6BBZHqK2XOUXArJ2t28maBTk5C2vlkP+T8Y9sWsxfYL+c/hy2fhFFvbw/7A8FmYYNTd0YkVHG/nUZGjpesSB4FjIxy9zZx5O+gF0yIOqjmTBten9B4lfSSZZT5jkUPLCyGSglCb4ZmbA==;7:VvtZkAsPkf96H2NDSd6nC8ppplHPxFdhxhYIri0bCe1NslP/pCY4/lO3EhG3REwMdwA8ZiFoeqGhliP27wBmeVnwsZ1DBuZM1GxM42sMbKJJ6nzeQ9JWRbYoBZml00zb7pg+naES1w1F7LotM9XN/Q== x-ms-office365-filtering-correlation-id: bc23af1e-e403-4f98-9baa-08d69029215d x-microsoft-antispam: BCL:0;PCL:0;RULEID:(2390118)(7020095)(4652040)(8989299)(4534185)(7168020)(4627221)(201703031133081)(201702281549075)(8990200)(5600110)(711020)(4605077)(2017052603328)(7153060)(7193020);SRVR:SL2PR04MB3049; x-ms-traffictypediagnostic: SL2PR04MB3049: x-ld-processed: 0423909d-296c-463e-ab5c-e5853a518df8,ExtAddr x-microsoft-antispam-prvs: x-forefront-prvs: 0945B0CC72 x-forefront-antispam-report: SFV:NSPM;SFS:(10019020)(346002)(366004)(376002)(136003)(39860400002)(396003)(199004)(189003)(316002)(476003)(6636002)(486006)(110136005)(2616005)(54906003)(6246003)(25786009)(478600001)(66066001)(81166006)(81156014)(11346002)(446003)(6512007)(55236004)(44832011)(53546011)(6506007)(386003)(229853002)(6436002)(102836004)(31686004)(6486002)(68736007)(36756003)(2906002)(14454004)(106356001)(186003)(26005)(105586002)(3846002)(256004)(6116002)(99286004)(86362001)(78486014)(14444005)(8676002)(8936002)(53936002)(31696002)(305945005)(71190400001)(4326008)(52116002)(71200400001)(76176011)(97736004)(7736002);DIR:OUT;SFP:1102;SCL:1;SRVR:SL2PR04MB3049;H:SL2PR04MB3436.apcprd04.prod.outlook.com;FPR:;SPF:None;LANG:en;PTR:InfoNoRecords;A:1;MX:1; received-spf: None (protection.outlook.com: oneplus.com does not designate permitted sender hosts) x-ms-exchange-senderadcheck: 1 x-microsoft-antispam-message-info: Fdoer0tFCz8sFUix+SCLGwpIuMl7QTFasOK6kYCzrGMWfP3u2iw29zqM+zc1Vc2z/Q6HAF1fM5aW6bviXab13uvzXaZj16YFOrVuoURUEJFScjzTteic99b4kOtPb0IF3OIw8HAaHceci5r4SffxbMxiDk6mhAuBGUn1vsJCb2OI6B5Ng7KWGRmrxWRaSAp1I7po57CH7VuvdU74ZcuIytuiu1y6EVISHkpjrh8NDasi9Nla/3XKUK97mRkL6okkox5AazDiknBjNPWXsv14fZ+SnD2C9UwtTovcL4EElYw70zr9BH5S3/Q8z65J1iPQtxnU2AgwBxnZv0c/WSv0wQ+zC1ZEfume+Kk+7hAcCCOv6tFlnwrQRfEbgkeUiRKfyWOX+C7DBorB6Qa+ormOYdejoP/Dy7plNg13Rxh4T7M= Content-Type: text/plain; charset="utf-8" Content-ID: <62786EC907B80248AA58520F45FA8FE1@apcprd04.prod.outlook.com> Content-Transfer-Encoding: base64 MIME-Version: 1.0 X-OriginatorOrg: oneplus.com X-MS-Exchange-CrossTenant-Network-Message-Id: bc23af1e-e403-4f98-9baa-08d69029215d X-MS-Exchange-CrossTenant-originalarrivaltime: 11 Feb 2019 13:59:23.4656 (UTC) X-MS-Exchange-CrossTenant-fromentityheader: Hosted X-MS-Exchange-CrossTenant-mailboxtype: HOSTED X-MS-Exchange-CrossTenant-id: 0423909d-296c-463e-ab5c-e5853a518df8 X-MS-Exchange-Transport-CrossTenantHeadersStamped: SL2PR04MB3049 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: DQoNCk9uIDExLzAyLzE5IDc6MTYgUE0sIFBldGVyIFppamxzdHJhIHdyb3RlOg0KPiBPbiBNb24s IEZlYiAxMSwgMjAxOSBhdCAxMjo1Mzo1M1BNICswMDAwLCBDaGludGFuIFBhbmR5YSB3cm90ZToN Cj4+IEN1cnJlbnRseSwgcGFnZSBsb2NrIG9wZXJhdGlvbiBpcyBub24tYXRvbWljLiBUaGlzIGlz IG9wZW5pbmcNCj4+IHNvbWUgc2NvcGUgZm9yIHJhY2UgY29uZGl0aW9uLiBGb3IgZXgsIGlmIDIg dGhyZWFkcyBhcmUgYWNjZXNzaW5nDQo+PiBzYW1lIHBhZ2UgZmxhZ3MsIGl0IG1heSBoYXBwZW4g dGhhdCBvdXIgZGVzaXJlZCB0aHJlYWQncyBwYWdlDQo+PiBsb2NrIGJpdCAoUEdfbG9ja2VkKSBt aWdodCBnZXQgb3ZlcndyaXR0ZW4gYnkgb3RoZXIgdGhyZWFkDQo+PiBsZWF2aW5nIHBhZ2UgdW5s b2NrZWQuIFRoaXMgY2FuIGNhdXNlIGlzc3VlcyBsYXRlciB3aGVuIHNvbWUNCj4+IGNvZGUgZXhw ZWN0cyBwYWdlIHRvIGJlIGxvY2tlZCBidXQgaXQgaXMgbm90Lg0KPj4NCj4+IE1ha2UgcGFnZSBs b2NrL3VubG9jayBvcGVyYXRpb24gdXNlIHRoZSBhdG9taWMgdmVyc2lvbiBvZg0KPj4gc2V0X2Jp dCBBUEkuIFRoZXJlIGFyZSBvdGhlciBmbGFnIHNldCBvcGVyYXRpb25zIHdoaWNoIHN0aWxsDQo+ PiB1c2VzIG5vbi1hdG9taWMgdmVyc2lvbiBvZiBzZXRfYml0IEFQSS4gQml0LCB0aGF0IG1pZ2h0 IGJlDQo+PiB0aGUgY2hhbmdlIGZvciB0aGUgZnV0dXJlLg0KPj4NCj4+IENoYW5nZS1JZDogSTEz YmRiZWRjMmIxOThhZjAxNGQ4ODVlMTkyNWM5M2I4M2VkNjY2MGUNCj4gDQo+IFRoYXQgZG9lc24n dCBiZWxvbmcgaW4gcGF0Y2hlcy4NCg0KU3VyZS4gVGhhdCdzIGEgbWlzcy4gV2lsbCBmaXggdGhp cy4NCg0KPiANCj4+IFNpZ25lZC1vZmYtYnk6IENoaW50YW4gUGFuZHlhIDxjaGludGFuLnBhbmR5 YUBvbmVwbHVzLmNvbT4NCj4gDQo+IE5BSy4NCj4gDQo+IFRoaXMgaXMgYm91bmQgdG8gcmVncmVz cyBzb21lIHN0dWZmLiBOb3cgYWdyZWVkIHRoYXQgdXNpbmcgbm9uLWF0b21pYw0KPiBvcHMgaXMg dHJpY2t5LCBidXQgbWFueSBhcmUgaW4gcGxhY2VzIHdoZXJlIHdlICdrbm93JyB0aGVyZSBjYW4n dCBiZQ0KPiBjb25jdXJyZW5jeS4NCj4gDQo+IElmIHlvdSBjYW4gc2hvdyBhbnkgc2luZ2xlIG9u ZSBpcyB3cm9uZywgd2UgY2FuIGZpeCB0aGF0IG9uZSwgYnV0IHdlJ3JlDQo+IG5vdCBnb2luZyB0 byBibGFua2V0IHJlbW92ZSBhbGwgdGhpcyBqdXN0IGJlY2F1c2UuDQoNCk5vdCBxdWl0ZSBmYW1p bGlhciB3aXRoIGJlbG93IHN0YWNrIGJ1dCBmcm9tIGNyYXNoIGR1bXAsIGZvdW5kIHRoYXQgdGhp cw0Kd2FzIGFub3RoZXIgc3RhY2sgcnVubmluZyBvbiBzb21lIG90aGVyIENQVSBhdCB0aGUgc2Ft ZSB0aW1lIHdoaWNoIGFsc28NCnVwZGF0ZXMgcGFnZSBjYWNoZSBscnUgYW5kIG1hbmlwdWxhdGUg bG9ja3MuDQoNCls4NDQxNS4zNDQ1NzddIFsyMDE5MDEyM18yMToyNzo1MC43ODYyNjRdQDEgcHJl ZW1wdF9jb3VudF9hZGQrMHhkYy8weDE4NA0KWzg0NDE1LjM0NDU4OF0gWzIwMTkwMTIzXzIxOjI3 OjUwLjc4NjI3Nl1AMSB3b3JraW5nc2V0X3JlZmF1bHQrMHhkYy8weDI2OA0KWzg0NDE1LjM0NDYw MF0gWzIwMTkwMTIzXzIxOjI3OjUwLjc4NjI4OF1AMSBhZGRfdG9fcGFnZV9jYWNoZV9scnUrMHg4 NC8weDExYw0KWzg0NDE1LjM0NDYxMl0gWzIwMTkwMTIzXzIxOjI3OjUwLjc4NjMwMV1AMSBleHQ0 X21wYWdlX3JlYWRwYWdlcysweDE3OC8weDcxNA0KWzg0NDE1LjM0NDYyNV0gWzIwMTkwMTIzXzIx OjI3OjUwLjc4NjMxM11AMSBleHQ0X3JlYWRwYWdlcysweDUwLzB4NjANCls4NDQxNS4zNDQ2MzZd IFsyMDE5MDEyM18yMToyNzo1MC43ODYzMjRdQDEgDQpfX2RvX3BhZ2VfY2FjaGVfcmVhZGFoZWFk KzB4MTZjLzB4MjgwDQpbODQ0MTUuMzQ0NjQ2XSBbMjAxOTAxMjNfMjE6Mjc6NTAuNzg2MzM0XUAx IGZpbGVtYXBfZmF1bHQrMHg0MWMvMHg1ODgNCls4NDQxNS4zNDQ2NTVdIFsyMDE5MDEyM18yMToy Nzo1MC43ODYzNDNdQDEgZXh0NF9maWxlbWFwX2ZhdWx0KzB4MzQvMHg1MA0KWzg0NDE1LjM0NDY2 NF0gWzIwMTkwMTIzXzIxOjI3OjUwLjc4NjM1M11AMSBfX2RvX2ZhdWx0KzB4MjgvMHg4OA0KDQpO b3QgZW50aXJlbHkgc3VyZSBpZiBpdCdzIHJhY2luZyB3aXRoIHRoZSBjcmFzaGluZyBzdGFjayBv ciBpdCdzIHNpbXBseQ0Kb3ZlcnJpZGVzIHRoZSB0aGUgYml0IHNldCBieSBjYXNlIDIgKG1lbnRp b25lZCBpbiAwLzIpLg0KPiANCg==