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 Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id D591EC7EE23 for ; Tue, 23 May 2023 08:55:32 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S235640AbjEWIzc (ORCPT ); Tue, 23 May 2023 04:55:32 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:59062 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S235751AbjEWIza (ORCPT ); Tue, 23 May 2023 04:55:30 -0400 Received: from eu-smtp-delivery-151.mimecast.com (eu-smtp-delivery-151.mimecast.com [185.58.85.151]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 11EAD118 for ; Tue, 23 May 2023 01:55:27 -0700 (PDT) Received: from AcuMS.aculab.com (156.67.243.121 [156.67.243.121]) by relay.mimecast.com with ESMTP with both STARTTLS and AUTH (version=TLSv1.2, cipher=TLS_ECDHE_RSA_WITH_AES_256_CBC_SHA384) id uk-mta-114-wfYMCpxpPx2Orn_grdK5TA-1; Tue, 23 May 2023 09:55:10 +0100 X-MC-Unique: wfYMCpxpPx2Orn_grdK5TA-1 Received: from AcuMS.Aculab.com (10.202.163.4) by AcuMS.aculab.com (10.202.163.4) with Microsoft SMTP Server (TLS) id 15.0.1497.48; Tue, 23 May 2023 09:55:08 +0100 Received: from AcuMS.Aculab.com ([::1]) by AcuMS.aculab.com ([::1]) with mapi id 15.00.1497.048; Tue, 23 May 2023 09:55:08 +0100 From: David Laight To: 'Geert Uytterhoeven' CC: Tony Lindgren , Stephen Boyd , "Tomasz Figa" , Sylwester Nawrocki , Will Deacon , Arnd Bergmann , Wolfram Sang , Dejin Zheng , Kai-Heng Feng , Nicholas Piggin , Heiko Carstens , Peter Zijlstra , Russell King , John Stultz , Thomas Gleixner , "Krzysztof Kozlowski" , Tero Kristo , "Ulf Hansson" , "Rafael J . Wysocki" , Vincent Guittot , "linux-arm-kernel@lists.infradead.org" , "linux-renesas-soc@vger.kernel.org" , "linux-pm@vger.kernel.org" , "linux-kernel@vger.kernel.org" Subject: RE: [PATCH v2 1/2] iopoll: Call cpu_relax() in busy loops Thread-Topic: [PATCH v2 1/2] iopoll: Call cpu_relax() in busy loops Thread-Index: AQHZg9SqgvUK/klkyEy9n2eMPFqMgK9U5DUggBKUGYCAACeioA== Date: Tue, 23 May 2023 08:55:08 +0000 Message-ID: <515a4c94ce764c58ab9a311d6cc5187f@AcuMS.aculab.com> References: <20230511064839.GG14287@atomide.com> <494a000774b546e4aae00ae0a7dfeae4@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 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-pm@vger.kernel.org RnJvbTogR2VlcnQgVXl0dGVyaG9ldmVuDQo+IFNlbnQ6IDIzIE1heSAyMDIzIDA4OjMwDQo+IA0K PiBIaSBEYXZpZCwNCj4gDQo+IE9uIFRodSwgTWF5IDExLCAyMDIzIGF0IDEyOjQ54oCvUE0gRGF2 aWQgTGFpZ2h0IDxEYXZpZC5MYWlnaHRAYWN1bGFiLmNvbT4gd3JvdGU6DQo+ID4gPiAqIEdlZXJ0 IFV5dHRlcmhvZXZlbiA8Z2VlcnQrcmVuZXNhc0BnbGlkZXIuYmU+IFsyMzA1MTAgMTM6MjNdOg0K PiA+ID4gPiBJdCBpcyBjb25zaWRlcmVkIGdvb2QgcHJhY3RpY2UgdG8gY2FsbCBjcHVfcmVsYXgo KSBpbiBidXN5IGxvb3BzLCBzZWUNCj4gPiA+ID4gRG9jdW1lbnRhdGlvbi9wcm9jZXNzL3ZvbGF0 aWxlLWNvbnNpZGVyZWQtaGFybWZ1bC5yc3QuICBUaGlzIGNhbiBub3QNCj4gPiA+ID4gb25seSBs b3dlciBDUFUgcG93ZXIgY29uc3VtcHRpb24gb3IgeWllbGQgdG8gYSBoeXBlcnRocmVhZGVkIHR3 aW4NCj4gPiA+ID4gcHJvY2Vzc29yLCBidXQgYWxzbyBhbGxvd3MgYW4gYXJjaGl0ZWN0dXJlIHRv IG1pdGlnYXRlIGhhcmR3YXJlIGlzc3Vlcw0KPiA+ID4gPiAoZS5nLiBBUk0gRXJyYXR1bSA3NTQz MjcgZm9yIENvcnRleC1BOSBwcmlvciB0byByMnAwKSBpbiB0aGUNCj4gPiA+ID4gYXJjaGl0ZWN0 dXJlLXNwZWNpZmljIGNwdV9yZWxheCgpIGltcGxlbWVudGF0aW9uLg0KPiA+DQo+ID4gRG9uJ3Qg eW91IGFsc28gbmVlZCB0byBjYWxsIGNvbmRfcmVzY2hlZCgpIChhdCBsZWFzdCBzb21lIHRpbWVz KS4NCj4gPiBPdGhlcndpc2UgdGhlIHByb2Nlc3MgY2FuJ3QgYmUgcHJlLWVtcHRlZCBhbmQgYSBS VCBwcm9jZXNzDQo+ID4gdGhhdCBsYXN0IHJhbiBvbiB0aGF0IGNwdSB3aWxsIG5ldmVyIGJlIHNj aGVkdWxlZC4NCj4gDQo+IEFjY29yZGluZyB0byBbMV0sIGNvbmRfcmVzY2hlZCgpIG11c3QgYmUg Y2FsbGVkIGF0IGxlYXN0IG9uY2UgcGVyIGZldw0KPiB0ZW5zIG9mIG1pbGxpc2Vjb25kcy4NCg0K SG1tbS4uLi4gdGVucyBvZiBtaWxsaXNlY29uZHMgaXMgcmVhbGx5IG11Y2ggdG9vIGxvbmcgZm9y IFJUIHRocmVhZHMuDQpBIGxpbWl0IG5lYXJlciAxbXMgd291bGQgYmUgYmFyZWx5IGFjY2VwdGFi bGUuDQoNCglEYXZpZA0KDQotDQpSZWdpc3RlcmVkIEFkZHJlc3MgTGFrZXNpZGUsIEJyYW1sZXkg Um9hZCwgTW91bnQgRmFybSwgTWlsdG9uIEtleW5lcywgTUsxIDFQVCwgVUsNClJlZ2lzdHJhdGlv biBObzogMTM5NzM4NiAoV2FsZXMpDQo=