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Petersen" CC: Jaegeuk Kim , Adrian Hunter , "linux-scsi@vger.kernel.org" , Konstantin Vyshetsky Subject: RE: [PATCH] scsi: ufs: Increase fDeviceInit poll frequency Thread-Topic: [PATCH] scsi: ufs: Increase fDeviceInit poll frequency Thread-Index: AQHYVRZhyRRshAHUI0+q0kOC6TpCPKz+oqMQ Date: Sun, 24 Apr 2022 06:42:56 +0000 Message-ID: References: <20220421002429.3136933-1-bvanassche@acm.org> In-Reply-To: <20220421002429.3136933-1-bvanassche@acm.org> Accept-Language: en-US Content-Language: en-US X-MS-Has-Attach: X-MS-TNEF-Correlator: authentication-results: dkim=none (message not signed) header.d=none;dmarc=none action=none header.from=wdc.com; x-ms-publictraffictype: Email x-ms-office365-filtering-correlation-id: cf3b2bff-3bc7-4c09-aeb4-08da25bdaa9e x-ms-traffictypediagnostic: MN2PR04MB5949:EE_ x-microsoft-antispam-prvs: wdcipoutbound: EOP-TRUE 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:DM6PR04MB6575.namprd04.prod.outlook.com;PTR:;CAT:NONE;SFS:(13230001)(4636009)(366004)(2906002)(55016003)(71200400001)(38100700002)(38070700005)(26005)(6506007)(122000001)(54906003)(316002)(110136005)(86362001)(9686003)(7696005)(4326008)(66556008)(66446008)(4744005)(76116006)(52536014)(8936002)(64756008)(8676002)(186003)(33656002)(508600001)(66946007)(66476007)(5660300002)(82960400001);DIR:OUT;SFP:1102; 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charset="us-ascii" Content-Transfer-Encoding: quoted-printable MIME-Version: 1.0 X-OriginatorOrg: wdc.com X-MS-Exchange-CrossTenant-AuthAs: Internal X-MS-Exchange-CrossTenant-AuthSource: DM6PR04MB6575.namprd04.prod.outlook.com X-MS-Exchange-CrossTenant-Network-Message-Id: cf3b2bff-3bc7-4c09-aeb4-08da25bdaa9e X-MS-Exchange-CrossTenant-originalarrivaltime: 24 Apr 2022 06:42:56.7450 (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: MOXg0KQ0krgTKQ7Q4oE7e9TG0Cdly4xlFfuLkRGVO8f+cwvXZceKsOnjGc+MJCrcFpLDlAlqLB4KqR4Vkrep7Q== X-MS-Exchange-Transport-CrossTenantHeadersStamped: MN2PR04MB5949 Precedence: bulk List-ID: X-Mailing-List: linux-scsi@vger.kernel.org > From: Konstantin Vyshetsky >=20 > UFS devices are expected to clear fDeviceInit flag in single digit millis= econds. > Current values of 5 to 10 millisecond sleep add to increased latency duri= ng > the initialization and resume path. This CL lowers the sleep range to 500= to > 1000 microseconds. >=20 > Signed-off-by: Konstantin Vyshetsky > Signed-off-by: Bart Van Assche Acked-by: Avri Altman