Received: by 2002:ac0:a5a6:0:0:0:0:0 with SMTP id m35-v6csp206644imm; Fri, 21 Sep 2018 12:53:46 -0700 (PDT) X-Google-Smtp-Source: ACcGV61pJf4kvBFQmtLKJ/7GOmT+F9eYazkSpX9Wxw59gRGL1RlFHsZ/GbHAMf1JsFMd+ptn3qCE X-Received: by 2002:a65:4585:: with SMTP id o5-v6mr2217180pgq.212.1537559626165; Fri, 21 Sep 2018 12:53:46 -0700 (PDT) ARC-Seal: i=1; a=rsa-sha256; t=1537559626; cv=none; d=google.com; s=arc-20160816; b=0wHZDB7fkn0UluArTIjYsRI0pMahhWJ+XqOn1aS+OevGEnzPfAdoq+JNcMAbP8QXeh GP/vUehPNHUl8ncg5frXzb9fFOFU+qVylbgCw/JXgaAnPERNKY5/DBbXL5AvVPfGr0QX uhWRcyp3arGcJVvr58SZ1vzgwFlhJm0+r1y6wMfRtDUQcDHQrxeEiwe2D3P0Mt33MuFx pGG+IL+V84WWx7KpDsiDuBfL8xYD0vihfDHTraSQIfho28pR9qWY8xnbnvOGaHrGTzV9 XoK9CWDa6HLaDUlz6JHsUq7CmYmtktxaMKYZrNBTdxW7l6VK4BtTJLaQIxLYuVZixk1T fnIQ== ARC-Message-Signature: i=1; a=rsa-sha256; c=relaxed/relaxed; d=google.com; s=arc-20160816; h=list-id:precedence:sender:mime-version:content-transfer-encoding :content-id:spamdiagnosticmetadata:spamdiagnosticoutput :content-language:accept-language:in-reply-to:references:message-id :date:thread-index:thread-topic:subject:cc:to:from:dkim-signature; bh=aavpDit87lE/8z09JJOXzvmi0LfvZfzhiHBuN5apJdk=; b=X987eKRRvxrhBXsoulvL3L7C2qJpAQdzxM/1TAoWR06qBZt3npESESRaa6v44OYxA8 kd7axzheacJ0ihqpVqCTg17K2D+E2bdS3m+S+4YwIy0myyzotfidnqOolV9Vu+/DiYuj zhjsnFUUqRjKww8eEq+vqK3vGL7xQwuIPSDO4cY3v1P10IrCh90yNRnTKmXpJogshsGp E4EitsRnaQYYidPLWh1RqFAaSPF7xKZnVrpSqWG/htPJwcv9xugyI2uvWoR2v/K2fULI dduopQxirn3sYzo41PQu7mTowoXXA9Y6u4wTanEfArtwPuds+6y7n5AFEMk2i3dqeQaO C1Pg== ARC-Authentication-Results: i=1; mx.google.com; dkim=pass header.i=@microsoft.com header.s=selector1 header.b=JrFXKbfC; spf=pass (google.com: best guess record for domain of linux-kernel-owner@vger.kernel.org designates 209.132.180.67 as permitted sender) smtp.mailfrom=linux-kernel-owner@vger.kernel.org; dmarc=pass (p=REJECT sp=REJECT dis=NONE) header.from=microsoft.com Return-Path: Received: from vger.kernel.org (vger.kernel.org. [209.132.180.67]) by mx.google.com with ESMTP id z71-v6si27985271pff.223.2018.09.21.12.53.16; Fri, 21 Sep 2018 12:53:46 -0700 (PDT) Received-SPF: pass (google.com: best guess record for domain of linux-kernel-owner@vger.kernel.org designates 209.132.180.67 as permitted sender) client-ip=209.132.180.67; Authentication-Results: mx.google.com; dkim=pass header.i=@microsoft.com header.s=selector1 header.b=JrFXKbfC; spf=pass (google.com: best guess record for domain of linux-kernel-owner@vger.kernel.org designates 209.132.180.67 as permitted sender) smtp.mailfrom=linux-kernel-owner@vger.kernel.org; dmarc=pass (p=REJECT sp=REJECT dis=NONE) header.from=microsoft.com Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S2391323AbeIVBnI (ORCPT + 99 others); Fri, 21 Sep 2018 21:43:08 -0400 Received: from mail-bl2nam02on0121.outbound.protection.outlook.com ([104.47.38.121]:28843 "EHLO NAM02-BL2-obe.outbound.protection.outlook.com" rhost-flags-OK-OK-OK-FAIL) by vger.kernel.org with ESMTP id S2391160AbeIVBnH (ORCPT ); Fri, 21 Sep 2018 21:43:07 -0400 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=microsoft.com; s=selector1; h=From:Date:Subject:Message-ID:Content-Type:MIME-Version:X-MS-Exchange-SenderADCheck; bh=aavpDit87lE/8z09JJOXzvmi0LfvZfzhiHBuN5apJdk=; b=JrFXKbfC9VrivFCRicm6OtT6eNtDtxlpzWNeDMINQ8Q65VHPfuhXRoXkeVFWgdAJwsP6MLNCvwnVmh6tIGs/mjDK6qfFg13raWlRRxSTazRMk9Dv9SW3VWWPhc81npRwf1rvcdz5KODA8llRqleFGRUULNR/lavNUaKlo5g493I= Received: from DM5PR21MB0508.namprd21.prod.outlook.com (10.172.91.142) by DM5PR21MB0745.namprd21.prod.outlook.com (10.173.172.11) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id 15.20.1185.9; Fri, 21 Sep 2018 19:52:42 +0000 Received: from DM5PR21MB0508.namprd21.prod.outlook.com ([fe80::88e6:fdc:1d8e:71f5]) by DM5PR21MB0508.namprd21.prod.outlook.com ([fe80::88e6:fdc:1d8e:71f5%4]) with mapi id 15.20.1185.010; Fri, 21 Sep 2018 19:52:42 +0000 From: Pasha Tatashin To: Logan Gunthorpe , Alexander Duyck , "linux-mm@kvack.org" , "linux-kernel@vger.kernel.org" , "linux-nvdimm@lists.01.org" CC: "mhocko@suse.com" , "dave.jiang@intel.com" , "mingo@kernel.org" , "dave.hansen@intel.com" , "jglisse@redhat.com" , "akpm@linux-foundation.org" , "dan.j.williams@intel.com" , "kirill.shutemov@linux.intel.com" Subject: Re: [PATCH v4 1/5] mm: Provide kernel parameter to allow disabling page init poisoning Thread-Topic: [PATCH v4 1/5] mm: Provide kernel parameter to allow disabling page init poisoning Thread-Index: AQHUUTEJUetFnXyPxkiXMreNCU4+e6T7GXWAgAAKQwCAAAM1gA== Date: Fri, 21 Sep 2018 19:52:42 +0000 Message-ID: <3c045f79-c18b-47dd-4017-a024edc9aa46@microsoft.com> References: <20180920215824.19464.8884.stgit@localhost.localdomain> <20180920222415.19464.38400.stgit@localhost.localdomain> <4d984974-ff16-35e4-76ff-f5e43e5e90da@deltatee.com> In-Reply-To: <4d984974-ff16-35e4-76ff-f5e43e5e90da@deltatee.com> Accept-Language: en-US Content-Language: en-US X-MS-Has-Attach: X-MS-TNEF-Correlator: x-originating-ip: [137.117.57.82] x-ms-publictraffictype: Email x-microsoft-exchange-diagnostics: 1;DM5PR21MB0745;6:CETR4paoFyca1BqTgzfb6mf0EHt2OGXREPzfuILsI1on+kIcbRa2uysvpJH3u2CYJJ0rPql5axyYqAi0iuVSmHYEmopudrmutaB2jMmOlrxmjGLQqUDJNJbyy+/PX9DP8dWXHQ8jz2IwwKV3DmtudCcjnFToTNw5FeUHq2ArroKtbv2qKV1lBxFpdDjv61rUSrRMZREiZFoqum18h5wKZ+WkVsxymUPd10iom7BQ/Wi08/y1uq0fj2yYm/CBolX5CJ5ippEFb0mEpvfQMBJG/QKt2cH5/iICRSNwzm35HXcFu69intPPFVRbHQEEsDILcCWDC3ZKPhL8mm6MZFqP7qY0nRjRT1De6XmdgEVZzTcicjjv8OAvaxZCOFeWKodAeCt7SCY4w6vbKeCzkGnM+zcT1gvfCqbM7mM9veTaKn9LOYJMoj/jZLWHtiOO3jpDQ1/fh1T4D0/TIM9aPYVzAw==;5:A/XvcgDmhuy/gYIwFx2NMBeIB0Cp0e5Oq1GsDk/Wf51htDFsJNV0vsxISd4MhAa5R/RW/OR89XUCEeoifI2phQ2zGIkOCGjqtUhM3NyKiuiyR5YAVJIU4dgMk55+M4iiEYuGwyPasB7oj3KqPKT07R7No7r9dsu8Xv6PvVLgOMU=;7:5UkYy2W1tWDADmSS1zyLTGRiUj9ab/S/29hUtp1962rvylKVdFgnjNkJY2KKwppPsUydqkEl7GiHXaPRhlwgmY9LUakp6MAMzAmaxw2czBHNOio0a3isSYp7VOKiuWyGm7+LgvwK7Zxli5rrHKqaQ7JG3DQ47ZoqKCW+XZz8pPuNaDHOQLeNG6m7LAXu2qNdGSxqDDmevAggfv0en9ibxxyQXZqbfQxZCzcPdOW2Mk9NLQvJX+Mj3MDtm5f8pIxG x-ms-exchange-antispam-srfa-diagnostics: SOS; x-ms-office365-filtering-correlation-id: d897436c-93f8-4deb-35e5-08d61ffbcb4a x-ms-office365-filtering-ht: Tenant x-microsoft-antispam: BCL:0;PCL:0;RULEID:(7020095)(4652040)(8989299)(4534165)(4627221)(201703031133081)(201702281549075)(8990200)(5600074)(711020)(4618075)(2017052603328)(7193020);SRVR:DM5PR21MB0745; x-ms-traffictypediagnostic: DM5PR21MB0745: x-microsoft-antispam-prvs: x-exchange-antispam-report-test: UriScan:; x-ms-exchange-senderadcheck: 1 x-exchange-antispam-report-cfa-test: BCL:0;PCL:0;RULEID:(8211001083)(6040522)(2401047)(5005006)(8121501046)(3002001)(10201501046)(3231355)(944501410)(52105095)(2018427008)(93006095)(93001095)(6055026)(149051)(150027)(6041310)(20161123558120)(20161123560045)(20161123562045)(201703131423095)(201702281528075)(20161123555045)(201703061421075)(201703061406153)(20161123564045)(201708071742011)(7699051)(76991041);SRVR:DM5PR21MB0745;BCL:0;PCL:0;RULEID:;SRVR:DM5PR21MB0745; x-forefront-prvs: 0802ADD973 x-forefront-antispam-report: SFV:NSPM;SFS:(10019020)(396003)(376002)(346002)(39860400002)(366004)(136003)(189003)(199004)(5660300001)(7736002)(68736007)(81156014)(81166006)(110136005)(66066001)(54906003)(99286004)(97736004)(14444005)(446003)(2616005)(256004)(11346002)(486006)(186003)(476003)(31696002)(5250100002)(86362001)(10090500001)(71190400001)(71200400001)(6506007)(53546011)(86612001)(2201001)(345774005)(14454004)(6246003)(36756003)(316002)(22452003)(2501003)(72206003)(6512007)(31686004)(6346003)(25786009)(7416002)(8936002)(2906002)(4326008)(93886005)(229853002)(6436002)(305945005)(8676002)(26005)(76176011)(2900100001)(478600001)(6486002)(53936002)(10290500003)(102836004)(3846002)(6116002)(106356001)(105586002);DIR:OUT;SFP:1102;SCL:1;SRVR:DM5PR21MB0745;H:DM5PR21MB0508.namprd21.prod.outlook.com;FPR:;SPF:None;LANG:en;PTR:InfoNoRecords;MX:1;A:1; received-spf: None (protection.outlook.com: microsoft.com does not designate permitted sender hosts) authentication-results: spf=none (sender IP is ) smtp.mailfrom=Pavel.Tatashin@microsoft.com; x-microsoft-antispam-message-info: vpyd+ARbuYjiSyX8mpGGbPm330dMgZYS3s21N1TCaXbXDcZ+a0a59Q4jDFhreKSsiXZoy3av0I3ISntsX3yZposA6X+r6JiGlcVn6gXwp+J9C4Uw4weFGhQlHdchvPWs2+Z+bK7CLwWyGocBUPt9GYQ8eL/QzjMiRd6g79ZzS/EqBIP3Lm3EzAG1ein3pEGgsspQ5S8L7A8yyWRHMCZ5V4G4sg4YzQ+GfgkmdhWbirhy4kmccK3uXjumWMY1EfRrYuwP6Xs8H22a/s4Xr1paEERPVr1NYsO27RyGcKqWr/QCKTKc8ksM8ResFGCgEtwY+fJLvxA3tlArmJUGFm4UzKnsjJ+TUiLYz7aYxL+kvFY= spamdiagnosticoutput: 1:99 spamdiagnosticmetadata: NSPM Content-Type: text/plain; charset="utf-8" Content-ID: Content-Transfer-Encoding: base64 MIME-Version: 1.0 X-OriginatorOrg: microsoft.com X-MS-Exchange-CrossTenant-Network-Message-Id: d897436c-93f8-4deb-35e5-08d61ffbcb4a X-MS-Exchange-CrossTenant-originalarrivaltime: 21 Sep 2018 19:52:42.6153 (UTC) X-MS-Exchange-CrossTenant-fromentityheader: Hosted X-MS-Exchange-CrossTenant-id: 72f988bf-86f1-41af-91ab-2d7cd011db47 X-MS-Exchange-Transport-CrossTenantHeadersStamped: DM5PR21MB0745 Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org DQoNCk9uIDkvMjEvMTggMzo0MSBQTSwgTG9nYW4gR3VudGhvcnBlIHdyb3RlOg0KPiBPbiAyMDE4 LTA5LTIxIDE6MDQgUE0sIFBhc2hhIFRhdGFzaGluIHdyb3RlOg0KPj4NCj4+PiArCQkJcHJfZXJy KCJ2bV9kZWJ1ZyBvcHRpb24gJyVjJyB1bmtub3duLiBza2lwcGVkXG4iLA0KPj4+ICsJCQkgICAg ICAgKnN0cik7DQo+Pj4gKwkJfQ0KPj4+ICsNCj4+PiArCQlzdHIrKzsNCj4+PiArCX0NCj4+PiAr b3V0Og0KPj4+ICsJaWYgKHBhZ2VfaW5pdF9wb2lzb25pbmcgJiYgIV9fcGFnZV9pbml0X3BvaXNv bmluZykNCj4+PiArCQlwcl93YXJuKCJQYWdlIHN0cnVjdCBwb2lzb25pbmcgZGlzYWJsZWQgYnkg a2VybmVsIGNvbW1hbmQgbGluZSBvcHRpb24gJ3ZtX2RlYnVnJ1xuIik7DQo+Pg0KPj4gTmV3IGxp bmVzICdcbicgY2FuIGJlIHJlbW92ZWQsIHRoZXkgYXJlIG5vdCBuZWVkZWQgZm9yIGtwcmludGZz Lg0KPiANCj4gTm8sIHRoYXQncyBub3QgY29ycmVjdC4NCj4gDQo+IEEgcHJpbnRrIHdpdGhvdXQg YSBuZXdsaW5lIHRlcm1pbmF0aW9uIGlzIG5vdCBlbWl0dGVkDQo+IGFzIG91dHB1dCB1bnRpbCB0 aGUgbmV4dCBwcmludGsgY2FsbC4gKFRvIHN1cHBvcnQgS0VSTl9DT05UKS4NCj4gVGhlcmVmb3Jl IHJlbW92aW5nIHRoZSAnXG4nIGNhdXNlcyBhIHByaW50ayB0byBub3QgYmUgcHJpbnRlZCB3aGVu IGl0IGlzDQo+IGNhbGxlZCB3aGljaCBjYW4gY2F1c2UgbG9uZyBkZWxheWVkIG1lc3NhZ2VzIGFu ZCBzdWJ0bGUgcHJvYmxlbXMgd2hlbg0KPiBkZWJ1Z2dpbmcuIEFsd2F5cyBrZWVwIHRoZSBuZXds aW5lIGluIHBsYWNlIGV2ZW4gdGhvdWdoIHRoZSBrZXJuZWwgd2lsbA0KPiBhZGQgb25lIGZvciB5 b3UgaWYgaXQncyBtaXNzaW5nLg0KDQpPSy4gVGhhbmsgeW91IGZvciBjbGFyaWZ5aW5nIExvZ2Fu LiBJJ3ZlIHNlZW4gbmV3IGxpbmVzIGFyZSBiZWluZw0KcmVtb3ZlZCBpbiBvdGhlciBwYXRjaGVz LA0KDQpQYXZlbA==