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=-8.8 required=3.0 tests=BAYES_00, HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_PATCH,MAILING_LIST_MULTI,SPF_HELO_NONE, 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 4221FC433E9 for ; Thu, 21 Jan 2021 22:18:41 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 17AB0239EF for ; Thu, 21 Jan 2021 22:18:41 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1727038AbhAUWSC (ORCPT ); Thu, 21 Jan 2021 17:18:02 -0500 Received: from eu-smtp-delivery-151.mimecast.com ([207.82.80.151]:24095 "EHLO eu-smtp-delivery-151.mimecast.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1726070AbhAUWRs (ORCPT ); Thu, 21 Jan 2021 17:17:48 -0500 Received: from AcuMS.aculab.com (156.67.243.126 [156.67.243.126]) (Using TLS) by relay.mimecast.com with ESMTP id uk-mta-244-l2OEnG_AOqSZjOQ6quE8Sw-1; Thu, 21 Jan 2021 22:16:09 +0000 X-MC-Unique: l2OEnG_AOqSZjOQ6quE8Sw-1 Received: from AcuMS.Aculab.com (fd9f:af1c:a25b:0:43c:695e:880f:8750) by AcuMS.aculab.com (fd9f:af1c:a25b:0:43c:695e:880f:8750) with Microsoft SMTP Server (TLS) id 15.0.1347.2; Thu, 21 Jan 2021 22:16:08 +0000 Received: from AcuMS.Aculab.com ([fe80::43c:695e:880f:8750]) by AcuMS.aculab.com ([fe80::43c:695e:880f:8750%12]) with mapi id 15.00.1347.000; Thu, 21 Jan 2021 22:16:08 +0000 From: David Laight To: "'Yu, Yu-cheng'" , Borislav Petkov CC: "x86@kernel.org" , "H. Peter Anvin" , Thomas Gleixner , Ingo Molnar , "linux-kernel@vger.kernel.org" , "linux-doc@vger.kernel.org" , "linux-mm@kvack.org" , "linux-arch@vger.kernel.org" , "linux-api@vger.kernel.org" , Arnd Bergmann , Andy Lutomirski , Balbir Singh , Cyrill Gorcunov , Dave Hansen , "Eugene Syromiatnikov" , Florian Weimer , "H.J. Lu" , Jann Horn , Jonathan Corbet , Kees Cook , Mike Kravetz , Nadav Amit , Oleg Nesterov , Pavel Machek , Peter Zijlstra , Randy Dunlap , "Ravi V. Shankar" , Vedvyas Shanbhogue , Dave Martin , "Weijiang Yang" , Pengfei Xu Subject: RE: [PATCH v17 08/26] x86/mm: Introduce _PAGE_COW Thread-Topic: [PATCH v17 08/26] x86/mm: Introduce _PAGE_COW Thread-Index: AQHW8DMjsVkr7OKTZEWf0jgz1DSfFaoyopGA Date: Thu, 21 Jan 2021 22:16:08 +0000 Message-ID: References: <20201229213053.16395-1-yu-cheng.yu@intel.com> <20201229213053.16395-9-yu-cheng.yu@intel.com> <20210121184405.GE32060@zn.tnic> In-Reply-To: Accept-Language: en-GB, en-US X-MS-Has-Attach: X-MS-TNEF-Correlator: x-ms-exchange-transport-fromentityheader: Hosted x-originating-ip: [10.202.205.107] MIME-Version: 1.0 Authentication-Results: relay.mimecast.com; auth=pass smtp.auth=C51A453 smtp.mailfrom=david.laight@aculab.com X-Mimecast-Spam-Score: 0 X-Mimecast-Originator: aculab.com Content-Language: en-US Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: base64 Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org RnJvbTogWXUsIFl1LWNoZW5nIA0KPiANCj4gT24gMS8yMS8yMDIxIDEwOjQ0IEFNLCBCb3Jpc2xh diBQZXRrb3Ygd3JvdGU6DQo+ID4gT24gVHVlLCBEZWMgMjksIDIwMjAgYXQgMDE6MzA6MzVQTSAt MDgwMCwgWXUtY2hlbmcgWXUgd3JvdGU6DQo+IFsuLi5dDQo+ID4+IEBAIC0zNDMsNiArMzQ5LDE2 IEBAIHN0YXRpYyBpbmxpbmUgcHRlX3QgcHRlX21rb2xkKHB0ZV90IHB0ZSkNCj4gPj4NCj4gPj4g ICBzdGF0aWMgaW5saW5lIHB0ZV90IHB0ZV93cnByb3RlY3QocHRlX3QgcHRlKQ0KPiA+PiAgIHsN Cj4gPj4gKwkvKg0KPiA+PiArCSAqIEJsaW5kbHkgY2xlYXJpbmcgX1BBR0VfUlcgbWlnaHQgYWNj aWRlbnRhbGx5IGNyZWF0ZQ0KPiA+PiArCSAqIGEgc2hhZG93IHN0YWNrIFBURSAoUlc9MCwgRGly dHk9MSkuICBNb3ZlIHRoZSBoYXJkd2FyZQ0KPiA+PiArCSAqIGRpcnR5IHZhbHVlIHRvIHRoZSBz b2Z0d2FyZSBiaXQuDQo+ID4+ICsJICovDQo+ID4+ICsJaWYgKGNwdV9mZWF0dXJlX2VuYWJsZWQo WDg2X0ZFQVRVUkVfU0hTVEspKSB7DQo+ID4+ICsJCXB0ZS5wdGUgfD0gKHB0ZS5wdGUgJiBfUEFH RV9ESVJUWSkgPj4gX1BBR0VfQklUX0RJUlRZIDw8IF9QQUdFX0JJVF9DT1c7DQo+ID4NCj4gPiBX aHkgdGhlIHVucmVhZGFibGUgc2hpZnRpbmcgd2hlbiB5b3UgY2FuIHNpbXBseSBkbzoNCj4gPg0K PiA+ICAgICAgICAgICAgICAgICAgaWYgKHB0ZS5wdGUgJiBfUEFHRV9ESVJUWSkNCj4gPiAgICAg ICAgICAgICAgICAgICAgICAgICAgcHRlLnB0ZSB8PSBfUEFHRV9DT1c7DQo+ID4NCg0KPiA+ID8N Cj4gDQo+IEl0IGNsZWFycyBfUEFHRV9ESVJUWSBhbmQgc2V0cyBfUEFHRV9DT1cuICBUaGF0IGlz LA0KPiANCj4gaWYgKHB0ZS5wdGUgJiBfUEFHRV9ESVJUWSkgew0KPiAJcHRlLnB0ZSAmPSB+X1BB R0VfRElSVFk7DQo+IAlwdGUucHRlIHw9IF9QQUdFX0NPVzsNCj4gfQ0KPiANCj4gU28sIHNoaWZ0 aW5nIG1ha2VzIHJlc3VsdGluZyBjb2RlIG1vcmUgZWZmaWNpZW50Lg0KDQpEb2VzIHRoZSBjb21w aWxlciBtYW5hZ2UgdG8gZG8gb25lIHNoaWZ0Pw0KDQpIb3cgY2FuIGl0IGNsZWFyIGFueXRoaW5n Pw0KVGhlcmUgaXMgb25seSBhbiB8PSBhZ2FpbnN0IHRoZSB0YXJnZXQuDQoNClNvbWV0aGluZyBo b3JyaWQgd2l0aCBePSBtaWdodCBzZXQgYW5kIGNsZWFyLg0KDQoJRGF2aWQNCg0KLQ0KUmVnaXN0 ZXJlZCBBZGRyZXNzIExha2VzaWRlLCBCcmFtbGV5IFJvYWQsIE1vdW50IEZhcm0sIE1pbHRvbiBL ZXluZXMsIE1LMSAxUFQsIFVLDQpSZWdpc3RyYXRpb24gTm86IDEzOTczODYgKFdhbGVzKQ0K