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=BAYES_00, HEADER_FROM_DIFFERENT_DOMAINS,MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS 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 57B21C433ED for ; Tue, 13 Apr 2021 21:19:17 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 33D87611AD for ; Tue, 13 Apr 2021 21:19:17 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1348336AbhDMVTg (ORCPT ); Tue, 13 Apr 2021 17:19:36 -0400 Received: from eu-smtp-delivery-151.mimecast.com ([185.58.86.151]:31547 "EHLO eu-smtp-delivery-151.mimecast.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S231719AbhDMVTe (ORCPT ); Tue, 13 Apr 2021 17:19:34 -0400 Received: from AcuMS.aculab.com (156.67.243.121 [156.67.243.121]) (Using TLS) by relay.mimecast.com with ESMTP id uk-mta-165-N8V1FVlIOV6ADD7YZPXsJw-1; Tue, 13 Apr 2021 22:19:11 +0100 X-MC-Unique: N8V1FVlIOV6ADD7YZPXsJw-1 Received: from AcuMS.Aculab.com (fd9f:af1c:a25b:0:994c:f5c2:35d6:9b65) by AcuMS.aculab.com (fd9f:af1c:a25b:0:994c:f5c2:35d6:9b65) with Microsoft SMTP Server (TLS) id 15.0.1497.2; Tue, 13 Apr 2021 22:19:10 +0100 Received: from AcuMS.Aculab.com ([fe80::994c:f5c2:35d6:9b65]) by AcuMS.aculab.com ([fe80::994c:f5c2:35d6:9b65%12]) with mapi id 15.00.1497.012; Tue, 13 Apr 2021 22:19:10 +0100 From: David Laight To: 'Arjun Roy' , Eric Dumazet CC: Mathieu Desnoyers , Eric Dumazet , Ingo Molnar , Peter Zijlstra , paulmck , Boqun Feng , linux-kernel Subject: RE: [PATCH v2 3/3] rseq: optimise rseq_get_rseq_cs() and clear_rseq_cs() Thread-Topic: [PATCH v2 3/3] rseq: optimise rseq_get_rseq_cs() and clear_rseq_cs() Thread-Index: AQHXMJPVg104is/mZUKAIt7DMH9hRKqy8Q+g Date: Tue, 13 Apr 2021 21:19:10 +0000 Message-ID: References: <20210413162240.3131033-1-eric.dumazet@gmail.com> <20210413162240.3131033-4-eric.dumazet@gmail.com> <567941475.72456.1618332885342.JavaMail.zimbra@efficios.com> <989543379.72506.1618334454075.JavaMail.zimbra@efficios.com> <1347243835.72576.1618336812739.JavaMail.zimbra@efficios.com> 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 PiBJZiB3ZSdyZSBzcGVjaWFsLWNhc2luZyA2NC1iaXQgYXJjaGl0ZWN0dXJlcyBhbnl3YXlzIC0g dW5yb2xsaW5nIHRoZQ0KPiAzMkIgY29weV9mcm9tX3VzZXIoKSBmb3Igc3RydWN0IHJzZXFfY3Mg YXBwZWFycyB0byBiZSByb3VnaGx5IDUtMTAlDQo+IHNhdmluZ3Mgb24geDg2LTY0IHdoZW4gSSBt ZWFzdXJlZCBpdCAod2VsbCwgaW4gYSBtaWNyb2JlbmNobWFyaywgbm90DQo+IGluIHJzZXFfZ2V0 X3JzZXFfY3MoKSBkaXJlY3RseSkuIFBlcmhhcHMgdGhhdCBjb3VsZCBiZSBhbiBhZGRpdGlvbmFs DQo+IGF2ZW51ZSBmb3IgaW1wcm92ZW1lbnQgaGVyZS4NCg0KVGhlIGtpbGxlciBpcyB1c3VhbGx5 ICd1c2VyIGNvcHkgaGFyZGVuaW5nJy4NCkl0IHNpZ25pZmljYW50bHkgc2xvd3MgZG93biBzZW5k bXNnKCkgYW5kIHJlY3Ztc2coKS4NCkkndmUgZ290IG1lYXN1cmFibGUgcGVyZm9ybWFuY2UgaW1w cm92ZW1lbnRzIGJ5DQp1c2luZyBfX2NvcHlfZnJvbV91c2VyKCkgd2hlbiB0aGUgYnVmZmVyIHNp bmNlIGhhcw0KYWxyZWFkeSBiZWVuIGNoZWNrZWQgLSBidXQgaXNuJ3QgYSBjb21waWxlLXRpbWUg Y29uc3RhbnQuDQoNClRoZXJlIGlzIGFsc28gc2NvcGUgZm9yIHVzaW5nIF9nZXRfdXNlcigpIHdo ZW4gcmVhZGluZw0KaW92ZWNbXSAoaW5zdGVhZCBvZiBjb3B5X2Zyb21fdXNlcigpKSBhbmQgZG9p bmcgYWxsIHRoZQ0KYm91bmQgY2hlY2tzIChldGMpIGluIHRoZSBsb29wLg0KVGhhdCBnaXZlcyBh IG1lYXN1cmFibGUgaW1wcm92ZW1lbnQgZm9yIHdyaXRldigiL2Rldi9udWxsIikuDQpJIG11c3Qg c29ydCB0aG9zZSBwYXRjaGVzIG91dCBhZ2Fpbi4NCg0KCURhdmlkDQoNCi0NClJlZ2lzdGVyZWQg QWRkcmVzcyBMYWtlc2lkZSwgQnJhbWxleSBSb2FkLCBNb3VudCBGYXJtLCBNaWx0b24gS2V5bmVz LCBNSzEgMVBULCBVSw0KUmVnaXN0cmF0aW9uIE5vOiAxMzk3Mzg2IChXYWxlcykNCg==