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 32914C433F5 for ; Mon, 20 Dec 2021 01:46:05 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S234462AbhLTBqE (ORCPT ); Sun, 19 Dec 2021 20:46:04 -0500 Received: from mga14.intel.com ([192.55.52.115]:41294 "EHLO mga14.intel.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S229912AbhLTBqD (ORCPT ); Sun, 19 Dec 2021 20:46:03 -0500 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=intel.com; i=@intel.com; q=dns/txt; s=Intel; t=1639964763; x=1671500763; h=from:to:cc:subject:date:message-id:references: in-reply-to:content-transfer-encoding:mime-version; bh=wH6T5akZvb5ODPZY6ZJBKViK3dOfYlXRRkCjBUMidaQ=; b=DYLwVyghCBe4uSH+mz0qMgEYHzG8CvKuJXdGlMqMPxE4S/t9eWrOnQG4 NI/petN+1hWsyHhFrZuOlnXwSo7gwgT3qltMW7BFErbW3jLnfdMSxZORQ 5+uDBF3UgqFkRbK9fz5hRwJoE3KP2hxE89qpJZkSwxBSrd5Zx7J9INnjd ye5OZZ9ibclj3AQTA0ej3jqfZlXfwm1I3BD3UwbKqijZRh/HDKzvppt/U 1xJH7mkE6Z2OAkqXK/2xBbBlQxAgHclfZ92rBewvNtPSb8pAlZx7ztyfp sQ0M7ENSWTTkuFe81Lt22btUo788dEEqE/2YClZX1Su5hrh3sYsecc62r g==; X-IronPort-AV: E=McAfee;i="6200,9189,10203"; a="240301027" X-IronPort-AV: E=Sophos;i="5.88,219,1635231600"; d="scan'208";a="240301027" Received: from orsmga008.jf.intel.com ([10.7.209.65]) by fmsmga103.fm.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 19 Dec 2021 17:46:02 -0800 X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="5.88,219,1635231600"; d="scan'208";a="520601147" Received: from orsmsx601.amr.corp.intel.com ([10.22.229.14]) by orsmga008.jf.intel.com with ESMTP; 19 Dec 2021 17:46:02 -0800 Received: from orsmsx611.amr.corp.intel.com (10.22.229.24) by ORSMSX601.amr.corp.intel.com (10.22.229.14) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256) id 15.1.2308.20; Sun, 19 Dec 2021 17:46:02 -0800 Received: from orsmsx612.amr.corp.intel.com (10.22.229.25) by ORSMSX611.amr.corp.intel.com (10.22.229.24) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256) id 15.1.2308.20; Sun, 19 Dec 2021 17:46:01 -0800 Received: from ORSEDG602.ED.cps.intel.com (10.7.248.7) by orsmsx612.amr.corp.intel.com (10.22.229.25) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256) id 15.1.2308.20 via Frontend Transport; Sun, 19 Dec 2021 17:46:01 -0800 Received: from NAM10-BN7-obe.outbound.protection.outlook.com (104.47.70.100) by edgegateway.intel.com (134.134.137.103) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id 15.1.2308.20; Sun, 19 Dec 2021 17:46:01 -0800 ARC-Seal: i=1; a=rsa-sha256; s=arcselector9901; d=microsoft.com; cv=none; b=eIteScKc4UC1PR38ZrxOctUgNf60p+X9ebrdLpEcxe8qr7bHBZQIgMwrBi3pjnfxfQQyFR2UT9IQzIg2uZ6s0mtEuJvxMoPB1y8m4ehDzQG22PmJjb+MuwqecjF87q/G86buCz3Lu6wk28sJ6wDqdrXWkiqdIqMxr0dPAFFjgfQsEsJEXRJfsqHYfxssYvxvkJ2PAYR3xWsjFy3PX52kuJwjBkVfzZCwPf2olj2bd1fKeCgCpDexpiPKPdQg7bKv0kXEli76c+FIT0HHAH7tsQY6G2FYbfncSDx3WAuEqpdJpEP3cW54pJ6SyhhBD+8mgzer30a7M5gaKYc5AMUVug== 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-AntiSpam-MessageData-ChunkCount:X-MS-Exchange-AntiSpam-MessageData-0:X-MS-Exchange-AntiSpam-MessageData-1; bh=wH6T5akZvb5ODPZY6ZJBKViK3dOfYlXRRkCjBUMidaQ=; b=a1gRujBEXCy717RzoBjtzPYE680FgNJa6rWOSHKFa4SF5XdbRV9oQ9gR+ByaMB8woPO9JkB/DRC6fjz0FEu3YV34W8e/LK6cma3Zq61bx5le7a0IGeXJRoPBUKB+gpCnj2yWnJQgzz3tB8fR+dOWJH5bJb/jGP3Ew8O2pivPRzNv40OY+5VzTrOyZD/3SbUgugXtLbaM5NdtX2+b4Iujp/JSj5mNdMfSWisDpAh7JMNi1bWY3QV34eCSvhMGnNsUh1GNTRDYbCKAeCZaBR1f9nJLzhfMJpsmbibRUtzy8Mb5iCqFx3ZSLKeNElG5COsEMvoM1nu59oVCKI4udisbNQ== ARC-Authentication-Results: i=1; mx.microsoft.com 1; spf=pass smtp.mailfrom=intel.com; dmarc=pass action=none header.from=intel.com; dkim=pass header.d=intel.com; arc=none Received: from PH0PR11MB5880.namprd11.prod.outlook.com (2603:10b6:510:143::14) by PH0PR11MB5927.namprd11.prod.outlook.com (2603:10b6:510:14e::11) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id 15.20.4801.14; Mon, 20 Dec 2021 01:45:59 +0000 Received: from PH0PR11MB5880.namprd11.prod.outlook.com ([fe80::b821:aef0:2208:7d1f]) by PH0PR11MB5880.namprd11.prod.outlook.com ([fe80::b821:aef0:2208:7d1f%3]) with mapi id 15.20.4801.020; Mon, 20 Dec 2021 01:45:59 +0000 From: "Zhang, Qiang1" To: Thomas Gleixner , "peterz@infradead.org" , "mingo@redhat.com" , "will@kernel.org" , "longman@redhat.com" CC: "linux-kernel@vger.kernel.org" , "Zhang, Qiang1" Subject: RE: [PATCH v2] locking/rtmutex: Fix incorrect spinning condition Thread-Topic: [PATCH v2] locking/rtmutex: Fix incorrect spinning condition Thread-Index: AQHX8xmfto9cD4Z770uMSCbPYAz7oKw3KfgAgACwDaCAACTQAIACoCTA Date: Mon, 20 Dec 2021 01:45:59 +0000 Message-ID: References: <20211217074207.77425-1-qiang1.zhang@intel.com> <87k0g3ar7z.ffs@tglx> <87zgoy9ry7.ffs@tglx> In-Reply-To: <87zgoy9ry7.ffs@tglx> Accept-Language: en-US Content-Language: en-US X-MS-Has-Attach: X-MS-TNEF-Correlator: dlp-product: dlpe-windows dlp-version: 11.6.200.16 dlp-reaction: no-action authentication-results: dkim=none (message not signed) header.d=none;dmarc=none action=none header.from=intel.com; x-ms-publictraffictype: Email x-ms-office365-filtering-correlation-id: a6fb1f0a-2a1d-4d6c-838d-08d9c35a793c x-ms-traffictypediagnostic: PH0PR11MB5927:EE_ x-microsoft-antispam-prvs: x-ms-oob-tlc-oobclassifiers: OLM:8882; x-ms-exchange-senderadcheck: 1 x-ms-exchange-antispam-relay: 0 x-microsoft-antispam: BCL:0; x-microsoft-antispam-message-info: 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 x-forefront-antispam-report: CIP:255.255.255.255;CTRY:;LANG:en;SCL:1;SRV:;IPV:NLI;SFV:NSPM;H:PH0PR11MB5880.namprd11.prod.outlook.com;PTR:;CAT:NONE;SFS:(366004)(508600001)(5660300002)(83380400001)(82960400001)(186003)(33656002)(7696005)(54906003)(110136005)(4744005)(2906002)(316002)(26005)(4326008)(6506007)(8936002)(66476007)(66946007)(8676002)(66556008)(66446008)(64756008)(107886003)(55016003)(76116006)(71200400001)(38100700002)(52536014)(86362001)(122000001)(38070700005)(9686003);DIR:OUT;SFP:1102; x-ms-exchange-antispam-messagedata-chunkcount: 1 x-ms-exchange-antispam-messagedata-0: =?utf-8?B?NTdUbzZ3cEs1QnpLbG94SHJOTjNUYWNyRUh2WXlaRUVzVXFrR0ZjME4vWmln?= =?utf-8?B?MkU3Zjc1NGloL0U4UEJBdndsTS9yU3g0WmVaRTFCeXZ1ZlpuTjR3N3U2M2NT?= =?utf-8?B?TnRieDhZeit6Qk1lWW1icUlZNWU3dHVqK2UwZlRiODMveFBjS1kzMFY2YklE?= =?utf-8?B?UzVrYjlqbWtQaWV6VFZXQTRmMnJrb2draEVNY0VVV3NOV1kvZ21DeSt3Tk1P?= =?utf-8?B?a3RzYW9EQ0dabG93ZVBJUjExcC9yYkFDOUJ1bk51V2dLdnVaV2hJV1Y3c3ZJ?= =?utf-8?B?a2hOd1dGOGVEVGhQRlMvdkJidG96QmJ0RHh5UFhlcEMyK3hSRzB5WGVOQmZR?= =?utf-8?B?a3FzNHhaOGZvYkVCQ2l2OEdHcnlBS1hENVY1S3BNQnN0eUg0N21pU2RteUQr?= =?utf-8?B?TXUveU81MGlHcjVDV2ZEckhyNXhxbFV5bWtrMVExeWFjamVrbkpTUkxQUGFs?= =?utf-8?B?VWc0VDdKNFpXUVVOOG9pcWxTajNXNnNPOFRlM3pUTC9Nc0d6NVcxMFIwejJ2?= =?utf-8?B?YzZPSHZNLzhBVGJDRlJNdVdTTDhXVHFiZWtyR3pMbS9LNlVlMWpzbmYwR2Vm?= =?utf-8?B?cUc2U203Q1NIcUZ0Q1VhbDBWSkkzN1MxOXIrOE1wZTFkY3lwZWpUdW90d1dm?= =?utf-8?B?UklVbTl0MklGcFU2WjdqelE5dDFvNW14WGRkOHZqK0lVWXJjbkdOQnd2cW1q?= =?utf-8?B?b2JLcVhDd09GVitnQkFGNGFDNWw0VU5xaVBudEVpdGVpaFEzWHpXOXJQTXhI?= =?utf-8?B?NTN0dllObzZRKyt5SGJpYzlpYXFqK0FqZENoUkdTUTFyV0lXdVlObnVUcmNx?= =?utf-8?B?RTNyU2tFcEFhZTIvMUl6cGE1dUs2WHFReFJkT00wdlNyWDFZTFMyaWhmNEFr?= =?utf-8?B?REJna1J0b1RaTURnNjY4aE50Z1RLYVczS0JsVmRsOG9mZTNvSUREUTBFQmxZ?= =?utf-8?B?T3JFMk1HQmtYMlZ1eldoS3lEK0NPeGFEWXdaTjhSeTZkMlQyTnUyanRsSWRN?= =?utf-8?B?anhHSkprOWlITG84YndONlJqZTJyVVRIRHVCWDhzUERXT3RiWXRLNlloUWFV?= =?utf-8?B?Z3F1ZVp5WEJrRFk5bGNqY1JVaW91cllJWWc5cGE5aGljdXVUb1hjUXE4RjZB?= =?utf-8?B?K004M2ZKZlpTWmlyUEE1dWZUTnVSVEUwOU5zdGExVWlrSENNQnpKWFd6T1ZY?= =?utf-8?B?MndwWlVEN2ZJNDVnWkU3akhyUGlWNEZleXczcHZZWXZZNFJrQ25lNnFlUWJL?= =?utf-8?B?MWRxanMxekJBb3RXNlZDbjZMOENkUTNNc2MvY1Rqay92VHpkbjF1QkNCM0Vw?= =?utf-8?B?NjFIZ0dVaVY1QlFDQXhVZHAyd1pnSjFER1pkVlVXaVRzUEdCQ3Y0ZmIvWDlw?= =?utf-8?B?NzNDMTVBVWU5SVB5M0NpWkZTWDhEZ3U4cnhuMWVXQVdsNjcxR0l0VTZMbFdi?= =?utf-8?B?WnBOVVFWZ0hsNVRFWEFUbkhyZzFLeW5iZjdwaVVWUmVkUFdGdVA3ZGVxSWtB?= =?utf-8?B?dHpxc0QzL0RESFZNeHdBZk03TklCemFsbnJ1QVRmekpMa2k1QVBwQzZ3aDdR?= =?utf-8?B?cEFJOFVWMDNqRVg1SWhMS2Y2VUJNc25TRkV1aDBYdWhDRnI5VHZ4VS93d3BQ?= =?utf-8?B?VEFwRnduc0JFam95THpCTzd5MkQyZXZCWUYxQ0taZGpjOUdkTDhkNnhaZCtk?= =?utf-8?B?RStXTmozUnVheTlDbW4vUElVTisvZVVzZW5qNGZBSktZYkx0U3JWb3A3bjM4?= =?utf-8?B?QzFDWkQxRWl6MHhMZGQ3NGRXYklFNWNZMnM0ODBMMUhwM3EyejhQVXc0NW5C?= =?utf-8?B?bG8yTyt1ejNXSHFwc1NFeGVCejhRbVpTLzIycFZwcWJCeTNBTThySDBta1ZX?= =?utf-8?B?ZGxkR1lZeWdOT3FLWitaaTY5UURUaTdXcFArSEZqSDNCOXV1ZDBRMlpVRnhM?= =?utf-8?B?QW9veHNaOW8rQnF0Y3JqeW5KZjlYV0lEWk9sK2tjajRXaTlkVkxuNnI2V3Rn?= =?utf-8?B?Vi96NzNsanRna0FrYzFhK3ZCMlllY1NKVkJ0YTU3TmVuRFFLNU5GY3RtSjFC?= =?utf-8?B?eDhheiszRjhvaXd3T2hUTGdnZldvdmRXMDRES2ZWa0hsRk9hUmcyYTBPUDF0?= =?utf-8?B?YW1zbHphc3hKcHhWNnRyY3VvVFRnZEJFU3kzY3pCL0tFSWUrdnhKbTdrV1JP?= =?utf-8?B?RWc9PQ==?= Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: base64 MIME-Version: 1.0 X-MS-Exchange-CrossTenant-AuthAs: Internal X-MS-Exchange-CrossTenant-AuthSource: PH0PR11MB5880.namprd11.prod.outlook.com X-MS-Exchange-CrossTenant-Network-Message-Id: a6fb1f0a-2a1d-4d6c-838d-08d9c35a793c X-MS-Exchange-CrossTenant-originalarrivaltime: 20 Dec 2021 01:45:59.7023 (UTC) X-MS-Exchange-CrossTenant-fromentityheader: Hosted X-MS-Exchange-CrossTenant-id: 46c98d88-e344-4ed4-8496-4ed7712e255d X-MS-Exchange-CrossTenant-mailboxtype: HOSTED X-MS-Exchange-CrossTenant-userprincipalname: eLSuvPOYYmM3vT2J1fX7V53BIDg/2vUk6jXG2O8o4TmNr61FobPc6X3S/adwxeiiA66bFKgiCGkTxNTiG3CW3Q== X-MS-Exchange-Transport-CrossTenantHeadersStamped: PH0PR11MB5927 X-OriginatorOrg: intel.com Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org DQo+Q2FuIHlvdSBwbGVhc2UgZml4IHlvdXIgbWFpbCBjbGllbnQgdG8gZG8gcHJvcGVyIHJlcGxp ZXMgd2l0aG91dCBjb3B5aW5nIHRoZSBtYWlsIGhlYWRlcnMgaW50byB0aGUgbWVzc2FnZT8NCg0K SSBoYXZlIGJlZW4gZml4IGl0DQoNCj4+VGhvdWdoIHRoaXMgZG9lcyBub3QgYXBwbHkgYmVjYXVz ZSB0aGUgY29uZGl0aW9uIGlzIGluY29tcGxldGUuIFlvdSANCj4+c29tZWhvdyBkcm9wcGVkIHRo aXMgZnJvbSB0aGUgY29uZGl0aW9uOg0KPj4NCj4+ICAgICAgICAgICAgICAgICAgIHZjcHVfaXNf cHJlZW1wdGVkKHRhc2tfY3B1KG93bmVyKSkpDQo+Pg0KPj5QbGVhc2UgbWFrZSBhbHdheXMgc3Vy ZSB0aGF0IHlvdXIgcGF0Y2hlcyBhcHBseSBhZ2FpbnN0IExpbnVzIHRyZWUgDQo+PmJlZm9yZSBz ZW5kaW5nIHRoZW0gb3V0Lg0KPg0KPiBUaGlzIGNvbW1pdCBjMGJlZDY5ZGFmNGIgKCJsb2NraW5n OiBNYWtlIG93bmVyX29uX2NwdSgpIGludG8gDQo+IDxsaW51eC9zY2hlZC5oPiIpIG1ha2UgdGhl IGZvbGxvd2luZyBtb2RpZmljYXRpb25zIGluIGxhdGVzdCBsaW51eC1uZXh0Lg0KPg0KPiArc3Rh dGljIGlubGluZSBib29sIG93bmVyX29uX2NwdShzdHJ1Y3QgdGFza19zdHJ1Y3QgKm93bmVyKSB7 DQo+ICsgICAgICAgLyoNCj4gKyAgICAgICAgKiBBcyBsb2NrIGhvbGRlciBwcmVlbXB0aW9uIGlz c3VlLCB3ZSBib3RoIHNraXAgc3Bpbm5pbmcgaWYNCj4gKyAgICAgICAgKiB0YXNrIGlzIG5vdCBv biBjcHUgb3IgaXRzIGNwdSBpcyBwcmVlbXB0ZWQNCj4gKyAgICAgICAgKi8NCj4gKyAgICAgICBy ZXR1cm4gb3duZXItPm9uX2NwdSAmJiAhdmNwdV9pc19wcmVlbXB0ZWQodGFza19jcHUob3duZXIp KTsNCj4gK30NCj4gKw0KPg0KPkZpbmUsIGJ1dCB0aGVuIHBsZWFzZSB0ZWxsIGFnYWluc3Qgd2hp Y2ggdHJlZS9icmFuY2ggdGhlIHBhdGNoIGlzLg0KDQpsaW51eC1uZXh0L21hc3RlciwgbGludXgt bmV4dC9ha3BtLCBsaW51eC1uZXh0L2FrcG0tYmFzZS4NCg0KVGhhbmtzLA0KDQpacWlhbmcNCg0K Pg0KPlRoYW5rcywNCj4NCj4gICAgICAgIHRnbHgNCg==