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 CB718C433EF for ; Mon, 20 Dec 2021 05:15:47 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S230402AbhLTFPq (ORCPT ); Mon, 20 Dec 2021 00:15:46 -0500 Received: from mail-cusazlp17010000.outbound.protection.outlook.com ([40.93.13.0]:14409 "EHLO na01-obe.outbound.protection.outlook.com" rhost-flags-OK-OK-OK-FAIL) by vger.kernel.org with ESMTP id S229437AbhLTFPn (ORCPT ); Mon, 20 Dec 2021 00:15:43 -0500 ARC-Seal: i=1; a=rsa-sha256; s=arcselector9901; d=microsoft.com; cv=none; b=MTIe5ojaYfvxyRTkcuo/7sfGFm6alqOhT4wKGwOjLk9PYMWJxb+bcvSj2V4rPXvLZ6/JOjuNujkD3FF+IgLyxrHSqdGhw3R6j7QOhFxDyLGdgT5Yakm88hTE/W613p6CtMNRNJUjRwKfzNPp+wDQ5jboNPGZazoBc5X7xutXIbkpjuqpq3mh6A2Isfl3+9hFB8rdWVeVdnt8jLjabLI/m8utUBqtpvyTorkUQjIZYaodyj5DVnB5cKvS6a/Z4dLVy9AatLqRPkqeS2Lc7CVHmBEyj04WI76UbvmTI8xfsEvDMBvfZ9Bv4CJlhaRqrKqPvooj1T088CWOFJRQpWJ2GQ== 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=eBo4+IqyIP3/QKBbyJQETQBm23WbbDNhXnlTfanXgYI=; b=LYy9G1GgoQMqx0F3mP4DpLw4ZDlSDzjbKIbWRlCeZBStO6H8FKkBW2TUXH6aiK+taaUDjkhA0P2L7uAvv2bf3lnfvS/g2aUBgAVP6Fj723nJLmyf17NJrMiBtf7m9GiZJC2GuxPGOCIm8lWHPPyOdDO8isUBhsJVrzX9iiue6HAN71dV5nKehwCVBoRgovKWchercY41Ziuy08OC9fSx1eCGM1QrycDGcBrdZwXOcwppUNYjBlObPZwfa99AG/K918dg5AeTuhnze8Ss/cXQfIZsgt9M82e87Z4g1jn4ULwZ3uAt1Ap1ANavkOuWLVAq8jRyBqsyyk5TzKwNY5YVZg== ARC-Authentication-Results: i=1; mx.microsoft.com 1; spf=pass smtp.mailfrom=microsoft.com; dmarc=pass action=none header.from=microsoft.com; dkim=pass header.d=microsoft.com; arc=none DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=microsoft.com; s=selector2; h=From:Date:Subject:Message-ID:Content-Type:MIME-Version:X-MS-Exchange-SenderADCheck; bh=eBo4+IqyIP3/QKBbyJQETQBm23WbbDNhXnlTfanXgYI=; b=a4ux3Wayk8NhAXUhjLlbkal7EJILsdqyCBTNHAmqg5tzo92yxWZjRmIQl4QaNj30MK6jfgmNxSF8t5xfioksX7t4irbEMxu8iFpqZFIeKyIY1pAOsaZIekvlmpPgfusLj4bwYc6+QGO0SiGLCk/DUAYd1q9w9BpjvJ7JCkDzM1Y= Received: from BYAPR21MB1270.namprd21.prod.outlook.com (2603:10b6:a03:105::15) by BYAPR21MB1366.namprd21.prod.outlook.com (2603:10b6:a03:110::15) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id 15.20.4844.3; Mon, 20 Dec 2021 05:15:40 +0000 Received: from BYAPR21MB1270.namprd21.prod.outlook.com ([fe80::9904:180b:e610:fd83]) by BYAPR21MB1270.namprd21.prod.outlook.com ([fe80::9904:180b:e610:fd83%4]) with mapi id 15.20.4755.004; Mon, 20 Dec 2021 05:15:39 +0000 From: Dexuan Cui To: Jens Axboe , "Alex Xu (Hello71)" , "linux-block@vger.kernel.org" , "ming.lei@redhat.com" , "hch@lst.de" , Long Li , "Michael Kelley (LINUX)" , "linux-kernel@vger.kernel.org" Subject: RE: very low IOPS due to "block: reduce kblockd_mod_delayed_work_on() CPU consumption" Thread-Topic: very low IOPS due to "block: reduce kblockd_mod_delayed_work_on() CPU consumption" Thread-Index: AQHX9OjnI2iGAQwSWUqnCtF9yw5sM6w58EYAgADmHHA= Date: Mon, 20 Dec 2021 05:15:39 +0000 Message-ID: References: <1639853092.524jxfaem2.none.ref@localhost> <1639853092.524jxfaem2.none@localhost> <7d1e4bb8-1a73-9529-3191-66df4ff2d5fe@kernel.dk> <12f43a71-713b-a74f-a169-b6ac3d804e50@kernel.dk> <237bd7d8-9e75-01b5-ebe7-8b1eb747474b@kernel.dk> In-Reply-To: <237bd7d8-9e75-01b5-ebe7-8b1eb747474b@kernel.dk> Accept-Language: en-US Content-Language: en-US X-MS-Has-Attach: X-MS-TNEF-Correlator: msip_labels: MSIP_Label_f42aa342-8706-4288-bd11-ebb85995028c_ActionId=6c721139-468d-4776-a06a-c0be155fe172;MSIP_Label_f42aa342-8706-4288-bd11-ebb85995028c_ContentBits=0;MSIP_Label_f42aa342-8706-4288-bd11-ebb85995028c_Enabled=true;MSIP_Label_f42aa342-8706-4288-bd11-ebb85995028c_Method=Standard;MSIP_Label_f42aa342-8706-4288-bd11-ebb85995028c_Name=Internal;MSIP_Label_f42aa342-8706-4288-bd11-ebb85995028c_SetDate=2021-12-20T05:11:53Z;MSIP_Label_f42aa342-8706-4288-bd11-ebb85995028c_SiteId=72f988bf-86f1-41af-91ab-2d7cd011db47; authentication-results: dkim=none (message not signed) header.d=none;dmarc=none action=none header.from=microsoft.com; x-ms-publictraffictype: Email x-ms-office365-filtering-correlation-id: a87a238b-3db9-4e4d-7410-08d9c377c34e x-ms-traffictypediagnostic: BYAPR21MB1366:EE_ x-ld-processed: 72f988bf-86f1-41af-91ab-2d7cd011db47,ExtAddr x-microsoft-antispam-prvs: x-ms-oob-tlc-oobclassifiers: OLM:3276; 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:BYAPR21MB1270.namprd21.prod.outlook.com;PTR:;CAT:NONE;SFS:(13230001)(4636009)(366004)(8990500004)(26005)(4744005)(2906002)(186003)(9686003)(33656002)(5660300002)(55016003)(6506007)(508600001)(7696005)(86362001)(10290500003)(71200400001)(38070700005)(122000001)(38100700002)(66446008)(64756008)(66476007)(66556008)(52536014)(316002)(8676002)(66946007)(110136005)(8936002)(76116006)(82950400001)(82960400001)(20210929001);DIR:OUT;SFP:1102; x-ms-exchange-antispam-messagedata-chunkcount: 1 x-ms-exchange-antispam-messagedata-0: =?utf-8?B?OWIyWUNOSGNqVncwN3R6UTVjeUlOYi8wRGpEK1BqM0RPcmExMU5RT3NKY0xu?= =?utf-8?B?SDZDRkh3K3NoSUUyTm5oci9KUFRQRitPVXNRcUt0eVBSRDZwVUtqVHNJTzF1?= =?utf-8?B?TUs5dmo2T2lldVJoRTkzMkJmdHZrM1Jmdlg1eE5vblR4R255czJHbEhoazZv?= =?utf-8?B?MHF4QkpuV283a2Rab2ErcDBiM3NHYWFFRWdZeEtMWTlRUFVHYzFoc1lDN1VO?= =?utf-8?B?ZE1seDlyU3huN2VIRlRCTEJ4ZFI3ajdOdWljTTFFcUdrbGFFVHdaWndMWFRT?= =?utf-8?B?NUQrcTVMTkFVQTU2TmtiTUoyNmJreGRwUGdpdzRTaitlYWJ3U2ZGZS9SY2k2?= =?utf-8?B?a01tYWRER3BSKzhiVldTMXlnSWtpNW5EV2pHbVkxNXlnQ09ObTlINUg4ZlRP?= =?utf-8?B?QksrTmg3RnlmUHpiL1ZXaEpEV3lGKzRMaEJvRjI4TlB6NERpZHdIbmF2SXF5?= =?utf-8?B?dDJlQkNSMkE0dzNvQnFORkZ4TkY2WU9vc0sxWHMxRS9BSnJ6czJTVUhzbDlC?= =?utf-8?B?bEpmSXN4WG5SQ09RQ090UDU5Sm9SeC9TMDBrUDVhcXhaeFNhcFVYVEV3L09I?= =?utf-8?B?cUVNT1lNQi81UG9MOHVPaGZiRzk5bytzbmdzT2N5Q3dmMFplYkdZVVh5ZHRU?= =?utf-8?B?N2dXZzI5cU8xWnVaUWpQb3JsYVZFbGNUK1l4d0lJOWRocWNtUEZadUkxc0VT?= =?utf-8?B?dlU1dXhxM2FCQ3A0MnJzYkJJZG5HRmNwT2hObEMwMEo2aG5qbEpESGptOFNZ?= =?utf-8?B?aDA5K3NTYXRwYXdaRzQyYnQ5YytRbW9vVUFuMG5MVUQxYm5yVWIzLzVuMitP?= =?utf-8?B?N3lXVSs5cmNFaGF2V2F4cFkwTzVWN2JLYWtCbmEyZmxUQ0o2QmxLbzE3dmU0?= =?utf-8?B?KzdjN20yZmpQWGJ5TmJvY09nNEpNdUlZOXM1RndGczNJSkVVY0RoaUZJRlpS?= =?utf-8?B?OGR5NVhNQ1lTeHRuY3MxRyt1Q2swNlBhR0wxWDRydTIzSUR0TU0zckQ3aEwz?= =?utf-8?B?Y3liVUovK0lNd1B3ZEttT21jVWxHcHpjd3J4VmpuaGpUOEdWYVhHYzY0ZFpj?= =?utf-8?B?ZUIrcWdvaXN2ZW5IbEZKWEZaME02L1c0UFI4bEM5NVR3N0trOHlsYXBZUjVX?= =?utf-8?B?TjAwRUZOMVhoNndUd3dRUWxCYmRtTGcxRjg4UU5wS0pqTTFualRidDEwTFQv?= =?utf-8?B?VDlhUlo1UmpDK1NIM25uZXpWUEZ3R29Iam1XT3FIN1EraUhuUjRVMXhDTHlR?= =?utf-8?B?U0xrS29mczVZVlMyREJLRHZVTitLcnBYeVJ5ak1JTFU0amNYUmtDNTc0UDlp?= =?utf-8?B?RnFxVFJnVUFkSW9BL0xuaFNxNkE3Vndub092QVpoOHNhU3Myb3kvd1ppcks4?= =?utf-8?B?RkpVZjRVc01pNlovZHBtemJrK0Y3a1dYMXVkM3hFODJESEUvNVdnaUU0S2xq?= =?utf-8?B?cUtGNURBdmhGQlBmclRoRXNCRzhiU3RBNURwT3VPc3JLbndCNk9tWWJtRUdM?= =?utf-8?B?SVViUVF2dS9xYTV6MXRScG0vdFFjaTJTbVV3c1dnT3BpOHg2UjdNWFhQamtU?= =?utf-8?B?OTNNam1jalRDbVQwMklabVBmaGtEamxuWkZLaERNclV1cEJrVHlZS2NpS2g1?= =?utf-8?B?NFVuSWkxWVdLbGF1NG9uMkYzWFpoQWs5UWtHbjduVUtYaGVBRjhtOC93WFA5?= =?utf-8?B?SHplT3l5andBdzIwZVpOcnFBYzlpRW5FV2o0SXAyZ3U1bHlWZXpWUWs3a1Iz?= =?utf-8?B?VEFKRkhFOXM1WFY3ZC9neCtlVElQSlFDZmtlTEdwSEtQNnc2aE5VaFh0TXFR?= =?utf-8?B?bEdNSHZlbDdTVEx2WFB4d3ZPWDUweG40eFovWHBGN1lkQmZLbHBneWhOVFZQ?= =?utf-8?B?ZHZxT01jZDFwUnFUbVB0Q0pveWJxdWgwaTlSNHB5RDJxMU1nSEJqWHNQNmVs?= =?utf-8?B?MFdxSFFrT2lucDFqMW9oYjZBajBpZWkxeVdtTVBQbW1YV1hCZ21ITHVoMldi?= =?utf-8?B?VW9PeFIvYklxRHgvL1ErL1AwaW03N2h1VEF4b29oMXQ1TzA3U2VZcldmdzgv?= =?utf-8?B?NU4rUHM3YkN2SU9uWU5zdXl4UjNTa2kwc3VzT0p3ZDRWQ0hZQlR2aU5tRUNa?= =?utf-8?B?aHNFRUtMR0xVQkdjbmJ2OUcxY3NkYzYyUTZRNmxoSm5KdUcrMFFDazZvcEhh?= =?utf-8?Q?dGoMt41weD7bJOe9ellXT0o=3D?= Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: base64 MIME-Version: 1.0 X-OriginatorOrg: microsoft.com X-MS-Exchange-CrossTenant-AuthAs: Internal X-MS-Exchange-CrossTenant-AuthSource: BYAPR21MB1270.namprd21.prod.outlook.com X-MS-Exchange-CrossTenant-Network-Message-Id: a87a238b-3db9-4e4d-7410-08d9c377c34e X-MS-Exchange-CrossTenant-originalarrivaltime: 20 Dec 2021 05:15:39.3459 (UTC) X-MS-Exchange-CrossTenant-fromentityheader: Hosted X-MS-Exchange-CrossTenant-id: 72f988bf-86f1-41af-91ab-2d7cd011db47 X-MS-Exchange-CrossTenant-mailboxtype: HOSTED X-MS-Exchange-CrossTenant-userprincipalname: fe31Ih7h42Bd8CMuHZ5tgA9LV8/ZetVP+iuq2k9eZVKhqwiBGFELTqNpRCGDYIa5pVlbzXtpxGFOs0jKqz0qAw== X-MS-Exchange-Transport-CrossTenantHeadersStamped: BYAPR21MB1366 Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org PiBGcm9tOiBKZW5zIEF4Ym9lIDxheGJvZUBrZXJuZWwuZGs+DQo+IFNlbnQ6IFN1bmRheSwgRGVj ZW1iZXIgMTksIDIwMjEgNzoyOCBBTQ0KPiA+IC4uLg0KPiA+IERleHVhbiwgY2FuIHlvdSB0ZXN0 IHRoaXMgZm9yIHlvdXIgdGVzdCBjYXNlIHRvbz8gSSdtIGdvaW5nIHRvIHF1ZXVlDQo+ID4gdXAg YSByZXZlcnQgZm9yIC1yYzYganVzdCBpbiBjYXNlLg0KPiANCj4gVGhpcyBvbmUgc2hvdWxkIGJl IGJldHRlci4uLg0KPiAuLi4NCj4gSmVucyBBeGJvZQ0KDQpIaSBKZW5zLCBzb3JyeSAtLSB1bmx1 Y2tpbHkgSSBsb3N0IHRoZSB0ZXN0IGVudmlyb25tZW50Li4gOi0oDQpJIHBpbmdlZCB0aGUgdXNl ciB0byBzZXQgdXAgdGhlIHRlc3QgZW52aXJvbm1lbnQgYWdhaW4sIGJ1dCBoZSdzDQpvbiB2YWNh dGlvbiB0aWxsIHRoZSBiZWdpbm5pbmcgb2YgSmFudWFyeS4NCg==