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=-3.8 required=3.0 tests=DKIM_SIGNED,DKIM_VALID, DKIM_VALID_AU,HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_PATCH,MAILING_LIST_MULTI, SPF_HELO_NONE,SPF_PASS,URIBL_BLOCKED autolearn=no 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 D7812C3A59E for ; Tue, 20 Aug 2019 13:56:08 +0000 (UTC) Received: from kanga.kvack.org (kanga.kvack.org [205.233.56.17]) by mail.kernel.org (Postfix) with ESMTP id 8D28322CF7 for ; Tue, 20 Aug 2019 13:56:08 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (1024-bit key) header.d=fb.com header.i=@fb.com header.b="apRZqeG2"; dkim=pass (1024-bit key) header.d=fb.onmicrosoft.com header.i=@fb.onmicrosoft.com header.b="P39FNSq1" DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org 8D28322CF7 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 24AB56B000A; Tue, 20 Aug 2019 09:56:08 -0400 (EDT) Received: by kanga.kvack.org (Postfix, from userid 40) id 1FA0E6B000D; Tue, 20 Aug 2019 09:56:08 -0400 (EDT) X-Delivered-To: int-list-linux-mm@kvack.org Received: by kanga.kvack.org (Postfix, from userid 63042) id 0C1006B000E; Tue, 20 Aug 2019 09:56:08 -0400 (EDT) X-Delivered-To: linux-mm@kvack.org Received: from forelay.hostedemail.com (smtprelay0010.hostedemail.com [216.40.44.10]) by kanga.kvack.org (Postfix) with ESMTP id D98296B000A for ; Tue, 20 Aug 2019 09:56:07 -0400 (EDT) Received: from smtpin03.hostedemail.com (10.5.19.251.rfc1918.com [10.5.19.251]) by forelay04.hostedemail.com (Postfix) with SMTP id 75A2187DC for ; Tue, 20 Aug 2019 13:56:07 +0000 (UTC) X-FDA: 75842955174.03.fruit15_3555a106c6518 X-HE-Tag: fruit15_3555a106c6518 X-Filterd-Recvd-Size: 9840 Received: from mx0a-00082601.pphosted.com (mx0a-00082601.pphosted.com [67.231.145.42]) by imf30.hostedemail.com (Postfix) with ESMTP for ; Tue, 20 Aug 2019 13:56:06 +0000 (UTC) Received: from pps.filterd (m0109334.ppops.net [127.0.0.1]) by mx0a-00082601.pphosted.com (8.16.0.27/8.16.0.27) with SMTP id x7KDlqX4015824; Tue, 20 Aug 2019 06:56:00 -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=xpTfgEWHO8zSxSSk1x9GvYDrVgIph2RroPkqwh7t5xQ=; b=apRZqeG2J7WLwnhELqxVizNskrOZyXdPUuSeHZst8p3HyJ3twoLYNOwSqBM2RqU1fQ1E vAIPy+cGdo+jBiVJDJp9JgXApnwvs+CQYDb5+9iuBcIYDNk1KKolxygMc16T5uzl9DGu tN84tr5V9ChTscLWNpnU/jorCfv+d9MSiiU= Received: from maileast.thefacebook.com ([163.114.130.16]) by mx0a-00082601.pphosted.com with ESMTP id 2ug6dyafcq-1 (version=TLSv1.2 cipher=ECDHE-RSA-AES128-GCM-SHA256 bits=128 verify=NOT); Tue, 20 Aug 2019 06:56:00 -0700 Received: from ash-exhub101.TheFacebook.com (2620:10d:c0a8:82::e) by ash-exhub103.TheFacebook.com (2620:10d:c0a8:82::c) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256) id 15.1.1713.5; Tue, 20 Aug 2019 06:55:59 -0700 Received: from NAM04-BN3-obe.outbound.protection.outlook.com (100.104.31.183) by o365-in.thefacebook.com (100.104.35.173) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_128_CBC_SHA256) id 15.1.1713.5 via Frontend Transport; Tue, 20 Aug 2019 06:55:58 -0700 ARC-Seal: i=1; a=rsa-sha256; s=arcselector9901; d=microsoft.com; cv=none; b=YTavsT3xpJFynkUp86hXc+KgwbjiUSEBrYK+2MTzz2qisJwyjbzMDWPdNsLOhbebO1Gea2ydeMrSRVp6IRzS87NihkXQyVMWGWR1VBkQDjYhJQIrYbwexBNB7nofiWFGKHaTL8cuceiv/nKuqPXn60erv439hDKnQmImfWrDLxDpb+8zl5ObVW2cO6q+vrX3+4B4xqsh8GdD1h5hmI2Qb8qnQXXPB30wmvW3fUugCNDQq2Em1oeGIGwwbS1GA1M61deEWCeFuEMW7hBdhM5zyaCtwiFpiEyKY3dIRnUbqhEFTfR+4jPPYsgl3o+78LbKG9YTXgDUfrlG4qzA0tM9BQ== 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-SenderADCheck; bh=xpTfgEWHO8zSxSSk1x9GvYDrVgIph2RroPkqwh7t5xQ=; b=Eeo1SJBQvP8shNfPKk/JxravRLFcyALNrlm8CD5SNNFFSKRmlYCf40tWJyqBOPXJKaKwuar261GUuUJJLWgyHiluWo/2RHp8uHUsG0HLjufm7BkBLOkShD1yYWss44pCT3+6pJfXix40HZQuOd2+5D6b1HjAwK4RFcJAa2hoRs66k3LuGNxJ6R2R61irFXP4FEPTfURVOKieRnsBCpVPKJ0zCCzDAAERQ53Mj6a40XDq0OUHiZ36QEtC8p8Bfrgu+JcfkpRsWqsYe3Y0n+afQz8Ub9vTPex6yG86ZXYtLiV23VwSPYS9FHF3SDKqK0Xeas2aYAPODwnV7WkHy3aqSg== 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 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=fb.onmicrosoft.com; s=selector2-fb-onmicrosoft-com; h=From:Date:Subject:Message-ID:Content-Type:MIME-Version:X-MS-Exchange-SenderADCheck; bh=xpTfgEWHO8zSxSSk1x9GvYDrVgIph2RroPkqwh7t5xQ=; b=P39FNSq15JU+I52fncGSHgBr26CjZaj5ECahkNZhWPfuPoYUkDR38U4wscGnTMZVZeon9yvv73kwPyoQ3Pg+HAnXALOgdtAsabydZITtc47G8CRVR/2Tkiwjj53aYU6l6U3MUBfjvH1/RuMMsbZui7jgAS5HVvTLvPc+fSmQcX4= Received: from BYAPR15MB3479.namprd15.prod.outlook.com (20.179.60.19) by BYAPR15MB3207.namprd15.prod.outlook.com (20.179.56.157) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id 15.20.2157.18; Tue, 20 Aug 2019 13:55:58 +0000 Received: from BYAPR15MB3479.namprd15.prod.outlook.com ([fe80::cd53:3e19:5b34:c385]) by BYAPR15MB3479.namprd15.prod.outlook.com ([fe80::cd53:3e19:5b34:c385%3]) with mapi id 15.20.2178.018; Tue, 20 Aug 2019 13:55:58 +0000 From: Rik van Riel To: Song Liu , Thomas Gleixner CC: Peter Zijlstra , "linux-kernel@vger.kernel.org" , "linux-mm@kvack.org" , Kernel Team , "stable@vger.kernel.org" , Joerg Roedel , Dave Hansen , Andy Lutomirski Subject: Re: [PATCH] x86/mm/pti: in pti_clone_pgtable() don't increase addr by PUD_SIZE Thread-Topic: [PATCH] x86/mm/pti: in pti_clone_pgtable() don't increase addr by PUD_SIZE Thread-Index: AQHVVywhQLSFzdLXp0en14V4x7p7pacDzfeAgAAVLICAACLkAIAACZgA Date: Tue, 20 Aug 2019 13:55:57 +0000 Message-ID: References: <20190820075128.2912224-1-songliubraving@fb.com> <20190820100055.GI2332@hirez.programming.kicks-ass.net> <44EA504D-2388-49EF-A807-B9712903B146@fb.com> In-Reply-To: <44EA504D-2388-49EF-A807-B9712903B146@fb.com> Accept-Language: en-US Content-Language: en-US X-MS-Has-Attach: X-MS-TNEF-Correlator: x-clientproxiedby: BN6PR11CA0066.namprd11.prod.outlook.com (2603:10b6:404:f7::28) To BYAPR15MB3479.namprd15.prod.outlook.com (2603:10b6:a03:112::19) x-ms-exchange-messagesentrepresentingtype: 1 x-originating-ip: [2620:10d:c091:480::751a] x-ms-publictraffictype: Email x-ms-office365-filtering-correlation-id: 24fcdb2c-ed5b-4135-3986-08d725762087 x-microsoft-antispam: BCL:0;PCL:0;RULEID:(2390118)(7020095)(4652040)(8989299)(4534185)(4627221)(201703031133081)(201702281549075)(8990200)(5600148)(711020)(4605104)(1401327)(2017052603328)(7193020);SRVR:BYAPR15MB3207; x-ms-traffictypediagnostic: BYAPR15MB3207: x-ms-exchange-transport-forked: True x-microsoft-antispam-prvs: x-ms-oob-tlc-oobclassifiers: OLM:6108; x-forefront-prvs: 013568035E x-forefront-antispam-report: SFV:NSPM;SFS:(10019020)(366004)(346002)(396003)(376002)(136003)(39860400002)(199004)(189003)(102836004)(71190400001)(2906002)(110136005)(5660300002)(6116002)(476003)(8936002)(7736002)(54906003)(99286004)(305945005)(46003)(86362001)(486006)(446003)(8676002)(2616005)(186003)(11346002)(256004)(64756008)(229853002)(66446008)(66476007)(66946007)(6512007)(478600001)(76176011)(25786009)(66556008)(53546011)(81166006)(81156014)(52116002)(6486002)(386003)(71200400001)(6246003)(316002)(53936002)(6436002)(4326008)(118296001)(36756003)(14454004)(6506007);DIR:OUT;SFP:1102;SCL:1;SRVR:BYAPR15MB3207;H:BYAPR15MB3479.namprd15.prod.outlook.com;FPR:;SPF:None;LANG:en;PTR:InfoNoRecords;A:1;MX: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: tJ9buLUJevEhLDM//RGIWdKifxGUinXi4puAndUh/VMBTK61Mz1ZbDzOjUZk2ywkP/U4uLqmGAb26hVCQS3LgHt2ibis1uWud+VG6AK3f0tOg62lSjuNNLXCMMAolbKEuAI9X9kuHyoOrzZs//iCL+OOI1Z8B7STHONRtWk0JAzCyhb37mILBj0dZnfobI2WnEMeJ55fJ8Oj3e76L3N5BAKjZmXPC3+6IMIDYX8NTeNUAZbhHvgjF492CYJ7CstYMOYeJfNKw5ThQmQHJU53mQmO30wr2aG/RpjJDJevWOC/nkIUuq1ZTjgMS90iLwAis4bMtd8YpEEMvEqIzcFeMODr4rDPGXfg5RcEoEYWaNlhbrmkUt/Wdl32yG5/yA9oJNUH1CbMGFjN3xGE3O5Yh99xMJ8KYhpfdEjgi3PXVbg= Content-Type: text/plain; charset="utf-8" Content-ID: <7DB66446F223444BADC7C0AD6B0EB412@namprd15.prod.outlook.com> Content-Transfer-Encoding: base64 MIME-Version: 1.0 X-MS-Exchange-CrossTenant-Network-Message-Id: 24fcdb2c-ed5b-4135-3986-08d725762087 X-MS-Exchange-CrossTenant-originalarrivaltime: 20 Aug 2019 13:55:58.0085 (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: mGSaxADpG91lP0+yzTihckwwbhoL/2mJ3/0F3eWBecAJ9RaiX2czcPDuRmzHQNrx X-MS-Exchange-Transport-CrossTenantHeadersStamped: BYAPR15MB3207 X-OriginatorOrg: fb.com X-Proofpoint-Virus-Version: vendor=fsecure engine=2.50.10434:,, definitions=2019-08-20_05:,, signatures=0 X-Proofpoint-Spam-Details: rule=fb_default_notspam policy=fb_default score=0 priorityscore=1501 malwarescore=0 suspectscore=0 phishscore=0 bulkscore=0 spamscore=0 clxscore=1015 lowpriorityscore=0 mlxscore=0 impostorscore=0 mlxlogscore=708 adultscore=0 classifier=spam adjust=0 reason=mlx scancount=1 engine=8.0.1-1906280000 definitions=main-1908200142 X-FB-Internal: deliver 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: T24gVHVlLCAyMDE5LTA4LTIwIGF0IDA5OjIxIC0wNDAwLCBTb25nIExpdSB3cm90ZToNCj4gPiBP biBBdWcgMjAsIDIwMTksIGF0IDQ6MTYgQU0sIFRob21hcyBHbGVpeG5lciA8dGdseEBsaW51dHJv bml4LmRlPg0KPiA+IHdyb3RlOg0KPiA+IA0KPiA+IE9uIFR1ZSwgMjAgQXVnIDIwMTksIFBldGVy IFppamxzdHJhIHdyb3RlOg0KPiA+ID4gV2hhdCB0aGF0IGNvZGUgd2FudHMgdG8gZG8gaXMgc2tp cCB0byB0aGUgZW5kIG9mIHRoZSBwdWQsIGENCj4gPiA+IHBtZF9zaXplDQo+ID4gPiBpbmNyZWFz ZSB3aWxsIG5vdCBkbyB0aGF0LiBBbmQgcmlnaHQgYmVsb3cgdGhpcywgdGhlcmUncyBhIHNlY29u ZA0KPiA+ID4gaW5zdGFuY2Ugb2YgdGhpcyBleGFjdCBwYXR0ZXJuLg0KPiA+ID4gDQo+ID4gPiBE aWQgSSBnZXQgdGhlIGJlbG93IHJpZ2h0Pw0KPiA+ID4gDQo+ID4gPiAtLS0NCj4gPiA+IGRpZmYg LS1naXQgYS9hcmNoL3g4Ni9tbS9wdGkuYyBiL2FyY2gveDg2L21tL3B0aS5jDQo+ID4gPiBpbmRl eCBiMTk2NTI0NzU5ZWMuLjMyYjIwYjNjYjIyNyAxMDA2NDQNCj4gPiA+IC0tLSBhL2FyY2gveDg2 L21tL3B0aS5jDQo+ID4gPiArKysgYi9hcmNoL3g4Ni9tbS9wdGkuYw0KPiA+ID4gQEAgLTMzMCwx MiArMzMwLDE0IEBAIHB0aV9jbG9uZV9wZ3RhYmxlKHVuc2lnbmVkIGxvbmcgc3RhcnQsDQo+ID4g PiB1bnNpZ25lZCBsb25nIGVuZCwNCj4gPiA+IA0KPiA+ID4gCQlwdWQgPSBwdWRfb2Zmc2V0KHA0 ZCwgYWRkcik7DQo+ID4gPiAJCWlmIChwdWRfbm9uZSgqcHVkKSkgew0KPiA+ID4gKwkJCWFkZHIg Jj0gUFVEX01BU0s7DQo+ID4gPiAJCQlhZGRyICs9IFBVRF9TSVpFOw0KPiA+IA0KPiA+IAkJCXJv dW5kX3VwKGFkZHIsIFBVRF9TSVpFKTsNCj4gDQo+IEkgZ3Vlc3Mgd2UgbmVlZCAicm91bmRfdXAo YWRkciArIFBNRF9TSVpFLCBQVURfU0laRSkiLiANCg0KV2hhdCBkb2VzIHRoYXQgZG8gaWYgc3Rh cnQgaXMgbGVzcyB0aGFuIFBNRF9TSVpFDQphd2F5IGZyb20gdGhlIG5leHQgUFVEX1NJWkUgYm91 bmRhcnk/DQoNCkhvdyBhYm91dDogICByb3VuZF91cChhZGRyICsgMSwgUFVEX1NJWkUpICA/DQoN Cg==