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Thread-Topic: [PATCH v8 2/2] pm80xx : Staggered spin up support. Thread-Index: AQHWdyGWFMJ2LWitWEWbukXdJDG1gKlUoF5sgABYGlA= Date: Wed, 2 Sep 2020 06:38:05 +0000 Message-ID: References: <20200820185123.27354-1-Viswas.G@microchip.com.com> <20200820185123.27354-3-Viswas.G@microchip.com.com> In-Reply-To: Accept-Language: en-US Content-Language: en-US X-MS-Has-Attach: X-MS-TNEF-Correlator: authentication-results: oracle.com; dkim=none (message not signed) header.d=none;oracle.com; dmarc=none action=none header.from=microchip.com; x-originating-ip: [43.229.88.89] x-ms-publictraffictype: Email x-ms-office365-filtering-correlation-id: 822f0919-8223-4c47-8c6c-08d84f0abf5d x-ms-traffictypediagnostic: SN6PR11MB2733: x-ms-exchange-transport-forked: True x-microsoft-antispam-prvs: x-bypassexternaltag: True x-ms-oob-tlc-oobclassifiers: OLM:6790; x-ms-exchange-senderadcheck: 1 x-microsoft-antispam: BCL:0; x-microsoft-antispam-message-info: jWQmln4EaxN4YqVMuyoKkE9LFEoVPnjA03SyS41GpD61rvBxLYwErRHSAFcC5BA6CU1XYPP46eBBseeH3JI9KsJ8bCBVXznqpAGu1ZtGeCPWqy3RQG27qoLV2nyY66NiR16Zyug1gV3fleFAWRHsikaM/sQpauQ99Wud16FbUS45YWR7n+arzncFPRHTfU4A6G/xg072Ulyr1qUXBl/7Wa5RxMfeaNMfTHeYNyQtIAz/cq7olfY25+ugmtZySI4/SF6j0/hiaezpAu3G6bXzdvZVCzrLijaXz1hRCwqUA2XKbrCNLC2SX52XBAfcB5Nu x-forefront-antispam-report: CIP:255.255.255.255;CTRY:;LANG:en;SCL:1;SRV:;IPV:NLI;SFV:NSPM;H:SN6PR11MB3488.namprd11.prod.outlook.com;PTR:;CAT:NONE;SFS:(136003)(39860400002)(366004)(346002)(396003)(376002)(53546011)(6506007)(55236004)(316002)(8936002)(55016002)(33656002)(26005)(2906002)(186003)(9686003)(76116006)(52536014)(66946007)(66446008)(64756008)(66556008)(71200400001)(66476007)(8676002)(5660300002)(4326008)(83380400001)(110136005)(7696005)(478600001)(54906003)(86362001);DIR:OUT;SFP:1101; x-ms-exchange-antispam-messagedata: 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 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: quoted-printable MIME-Version: 1.0 X-MS-Exchange-CrossTenant-AuthAs: Internal X-MS-Exchange-CrossTenant-AuthSource: SN6PR11MB3488.namprd11.prod.outlook.com X-MS-Exchange-CrossTenant-Network-Message-Id: 822f0919-8223-4c47-8c6c-08d84f0abf5d X-MS-Exchange-CrossTenant-originalarrivaltime: 02 Sep 2020 06:38:05.0922 (UTC) X-MS-Exchange-CrossTenant-fromentityheader: Hosted X-MS-Exchange-CrossTenant-id: 3f4057f3-b418-4d4e-ba84-d55b4e897d88 X-MS-Exchange-CrossTenant-mailboxtype: HOSTED X-MS-Exchange-CrossTenant-userprincipalname: Y86v6gYgv/I1hnA3lVXirJ4ra1l+526L2UcsKwWfpbZMa6F4F0/tlsq3BSoipUGakgaIj2rYU4o8PZo/BqdfBw== X-MS-Exchange-Transport-CrossTenantHeadersStamped: SN6PR11MB2733 Sender: linux-scsi-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-scsi@vger.kernel.org Thanks Martin. We will move this to libsas. Regards, Viswas G > -----Original Message----- > From: Martin K. Petersen > Sent: Wednesday, September 2, 2020 6:51 AM > To: Viswas G > Cc: linux-scsi@vger.kernel.org; Vasanthalakshmi Tharmarajan - I30664 > ; Viswas G - I30667 > ; Deepak Ukey - I31172 > ; martin.petersen@oracle.com; > yuuzheng@google.com; auradkar@google.com; vishakhavc@google.com; > bjashnani@google.com; radha@google.com; akshatzen@google.com > Subject: Re: [PATCH v8 2/2] pm80xx : Staggered spin up support. >=20 > EXTERNAL EMAIL: Do not click links or open attachments unless you know > the content is safe >=20 > Viswas, >=20 > > As a part of drive discovery, driver will initaite the drive spin up. > > If all drives do spin up together, it will result in large power > > consumption. To reduce the power consumption, driver provide an option > > to make a small group of drives (say 3 or 4 drives together) to do the > > spin up. The delay between two spin up group and no of drives to spin > > up (group) can be programmed by the customer in seeprom and driver > > will use it to control the spinup. >=20 > Please implement this in libsas as several people have suggested. > Thanks! >=20 > -- > Martin K. Petersen Oracle Linux Engineering