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Petersen" , Greg KH , Hans Holmberg , Kernel development list Subject: Re: Slow I/O on USB media after commit f664a3cc17b7d0a2bc3b3ab96181e1029b0ec0e6 Thread-Topic: Slow I/O on USB media after commit f664a3cc17b7d0a2bc3b3ab96181e1029b0ec0e6 Thread-Index: AQHVV3qbTKYWY4pSG0OtJLbZzV/0bg== Date: Thu, 7 Nov 2019 07:54:04 +0000 Message-ID: References: Accept-Language: en-US Content-Language: en-US X-MS-Has-Attach: X-MS-TNEF-Correlator: authentication-results: spf=none (sender IP is ) smtp.mailfrom=Damien.LeMoal@wdc.com; x-originating-ip: [199.255.47.8] x-ms-publictraffictype: Email x-ms-office365-filtering-ht: Tenant x-ms-office365-filtering-correlation-id: c91f0dae-d85d-4f9a-b394-08d76357a8ea x-ms-traffictypediagnostic: BYAPR04MB5814: x-ms-exchange-transport-forked: True x-microsoft-antispam-prvs: wdcipoutbound: EOP-TRUE x-ms-oob-tlc-oobclassifiers: OLM:6430; x-forefront-prvs: 0214EB3F68 x-forefront-antispam-report: SFV:NSPM;SFS:(10019020)(4636009)(136003)(39860400002)(346002)(376002)(396003)(366004)(199004)(189003)(71190400001)(71200400001)(446003)(110136005)(7416002)(6116002)(7736002)(3846002)(316002)(54906003)(305945005)(476003)(486006)(74316002)(53546011)(6506007)(102836004)(26005)(86362001)(7696005)(76176011)(33656002)(5660300002)(2906002)(52536014)(256004)(14444005)(66066001)(186003)(229853002)(81166006)(478600001)(8676002)(81156014)(25786009)(55016002)(2171002)(6246003)(14454004)(4744005)(66476007)(66556008)(64756008)(91956017)(66446008)(8936002)(4326008)(9686003)(66946007)(6436002)(76116006)(99286004);DIR:OUT;SFP:1102;SCL:1;SRVR:BYAPR04MB5814;H:BYAPR04MB5816.namprd04.prod.outlook.com;FPR:;SPF:None;LANG:en;PTR:InfoNoRecords;A:1;MX:1; x-ms-exchange-senderadcheck: 1 x-microsoft-antispam: BCL:0; x-microsoft-antispam-message-info: nmFpDR+pmjpwf22nWW7kL+ke+ZKMZir89DUWH3ieAi99qixikkqfCzlgg5v8FAPAKMoXYwuLS8y2EecwZXD+ktfudibXAY96hJeZysUrTuPMerFcEXyikIF9og6I5Ca+vFJYqm/7pocoSLZnOHZ54NPnNGdeBBmuLyXaIefD0SGZKp5EsYGLVR4ZmCYz26brJZB87wENrYUuK6Qubu164BDt7JhXG5yvjxkSUIgZmHtUA9bs68hMB1Z9t9yMwjMSq9acaVxyKd3vBWdSkILjglvaLTA0xZl5RXX9t7WDo3S537HrMYCa3Q1GYN0hyX1Iz8L3vPognfuqS7AYsBq7j5nyJUmCDutTC/mDYBiFw90uM1idIgN/7MF9h4MCyeiQmOT83gpZdrl/jf4mSQLfl4F8oQW2QwAncK0KjsEuYXDMk9XpDrzpuWZTQpHQP12g Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: quoted-printable MIME-Version: 1.0 X-OriginatorOrg: wdc.com X-MS-Exchange-CrossTenant-Network-Message-Id: c91f0dae-d85d-4f9a-b394-08d76357a8ea X-MS-Exchange-CrossTenant-originalarrivaltime: 07 Nov 2019 07:54:04.1993 (UTC) X-MS-Exchange-CrossTenant-fromentityheader: Hosted X-MS-Exchange-CrossTenant-id: b61c8803-16f3-4c35-9b17-6f65f441df86 X-MS-Exchange-CrossTenant-mailboxtype: HOSTED X-MS-Exchange-CrossTenant-userprincipalname: NEvHkZwqamLEEzISMOD8rBulfc30NjgZbrxll8ll1kfGMydAy2v+9yC0myF4YHZrKQKgAd1q+8ggfgYTXUGZJg== X-MS-Exchange-Transport-CrossTenantHeadersStamped: BYAPR04MB5814 Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On 2019/11/07 16:04, Andrea Vai wrote:=0A= > Il giorno mer, 06/11/2019 alle 22.13 +0000, Damien Le Moal ha scritto:=0A= >>=0A= >>=0A= >> Please simply try your write tests after doing this:=0A= >>=0A= >> echo mq-deadline > /sys/block/> disk>/queue/scheduler=0A= >>=0A= >> And confirm that mq-deadline is selected with:=0A= >>=0A= >> cat /sys/block//queue/scheduler=0A= >> [mq-deadline] kyber bfq none=0A= > =0A= > ok, which kernel should I test with this: the fresh git cloned, or the=0A= > one just patched with Alan's patch, or doesn't matter which one?=0A= =0A= Probably all of them to see if there are any differences.=0A= =0A= > =0A= > Thanks, and bye,=0A= > Andrea=0A= > =0A= > =0A= =0A= =0A= -- =0A= Damien Le Moal=0A= Western Digital Research=0A=