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 23730C433B4 for ; Wed, 14 Apr 2021 16:08:54 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id F00906117A for ; Wed, 14 Apr 2021 16:08:53 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1352641AbhDNQJO (ORCPT ); Wed, 14 Apr 2021 12:09:14 -0400 Received: from eu-smtp-delivery-151.mimecast.com ([185.58.85.151]:53760 "EHLO eu-smtp-delivery-151.mimecast.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S233288AbhDNQJL (ORCPT ); Wed, 14 Apr 2021 12:09:11 -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-220-x4Kd4_CiM3qjXPCTKqRshQ-1; Wed, 14 Apr 2021 17:08:47 +0100 X-MC-Unique: x4Kd4_CiM3qjXPCTKqRshQ-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; Wed, 14 Apr 2021 17:08:46 +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; Wed, 14 Apr 2021 17:08:46 +0100 From: David Laight To: 'Eric Dumazet' CC: Arjun Roy , 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///+zwCAALJWEIAAenQAgAARogA= Date: Wed, 14 Apr 2021 16:08:46 +0000 Message-ID: <1e5576a1a5b24cb0b1d53b9bb22d528e@AcuMS.aculab.com> 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> <2c6885b0241d4127b8cb7e38abbbe1e5@AcuMS.aculab.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 RnJvbTogRXJpYyBEdW1hemV0DQo+IFNlbnQ6IDE0IEFwcmlsIDIwMjEgMTc6MDANCi4uLg0KPiA+ IFJlcGVhdGVkIHVuc2FmZV9nZXRfdXNlcigpIGNhbGxzIGFyZSBjcnlpbmcgb3V0IGZvciBhbiBv cHRpbWlzYXRpb24uDQo+ID4gWW91IGdldCBzb21ldGhpbmcgbGlrZToNCj4gPiAgICAgICAgIGZh aWxlZCA9IDA7DQo+ID4gICAgICAgICBjb3B5KCk7DQo+ID4gICAgICAgICBpZiAoZmFpbGVkKSBn b3RvIGVycm9yOw0KPiA+ICAgICAgICAgY29weSgpOw0KPiA+ICAgICAgICAgaWYgKGZhaWxlZCkg Z290byBlcnJvcjsNCj4gPiBXaGVyZSAnZmFpbGVkJyBpcyBzZXQgYnkgdGhlIGZhdWx0IGhhbmRs ZXIuDQo+ID4NCj4gPiBUaGlzIGNvdWxkIGJlIG9wdGltaXNlZCB0bzoNCj4gPiAgICAgICAgIGZh aWxlZCA9IDA7DQo+ID4gICAgICAgICBjb3B5KCk7DQo+ID4gICAgICAgICBjb3B5KCk7DQo+ID4g ICAgICAgICBpZiAoZmFpbGVkKSBnb3RvIGVycm9yOw0KPiA+IEV2ZW4gaWYgaXQgZmF1bHRzIG9u IGV2ZXJ5IGludmFsaWQgYWRkcmVzcyBpdCBwcm9iYWJseQ0KPiA+IGRvZXNuJ3QgbWF0dGVyIC0g bm8gb25lIGNhcmVzIGFib3V0IHRoYXQgcGF0aC4NCj4gDQo+IA0KPiBPbiB3aGljaCBhcmNoIGFy ZSB5b3UgbG9va2luZyBhdCA/DQo+IA0KPiBPbiB4ODZfNjQgYXQgbGVhc3QsIGNvZGUgZ2VuZXJh dGlvbiBpcyBqdXN0IHBlcmZlY3QuDQo+IE5vdCBldmVuIGEgY29uZGl0aW9uYWwgam1wLCBpdCBp cyBhbGwgaGFuZGxlZCBieSBleGNlcHRpb25zIChpZiBhbnkpDQo+IA0KPiBzdGFjDQo+IGNvcHko KTsNCj4gY29weSgpOw0KPiBjbGFjDQo+IA0KPiANCj4gPG91dF9vZl9saW5lPg0KPiBlZmF1bHRf ZW5kOiBkbyBlcnJvciByZWNvdmVyeS4NCg0KSXQgd2lsbCBiZSB4ODZfNjQuDQpJJ20gZGVmaW5p dGVseSBzZWVpbmcgcmVwZWF0ZWQgdGVzdHMgb2YgKElJUkMpICVyZHguDQoNCkl0IG1heSB3ZWxs IGJlIGJlY2F1c2UgdGhlIGNvbXBpbGVyIGlzbid0IHZlcnkgbmV3Lg0KV2lsbCBiZSBhbiBVYnVu dHUgYnVpbGQgb2YgOS4zLjAuDQpEb2VzIHRoYXQgc3VwcG9ydCAnYXNtIGdvdG8gd2l0aCBvdXRw dXRzJyAtIHdoaWNoDQptYXkgYmUgdGhlIGRpZmZlcmVuY2UuDQoNCglEYXZpZA0KDQotDQpSZWdp c3RlcmVkIEFkZHJlc3MgTGFrZXNpZGUsIEJyYW1sZXkgUm9hZCwgTW91bnQgRmFybSwgTWlsdG9u IEtleW5lcywgTUsxIDFQVCwgVUsNClJlZ2lzdHJhdGlvbiBObzogMTM5NzM4NiAoV2FsZXMpDQo=