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Petersen" , "linux-scsi@vger.kernel.org" Subject: Re: [PATCH v5 0/5] Initial support for multi-actuator HDDs Thread-Topic: [PATCH v5 0/5] Initial support for multi-actuator HDDs Thread-Index: AQHXj060+x8p8fG9EkmgObG6vBUOOw== Date: Mon, 23 Aug 2021 01:27:02 +0000 Message-ID: References: <20210812075015.1090959-1-damien.lemoal@wdc.com> Accept-Language: en-US Content-Language: en-US X-MS-Has-Attach: X-MS-TNEF-Correlator: authentication-results: kernel.dk; dkim=none (message not signed) header.d=none;kernel.dk; dmarc=none action=none header.from=wdc.com; x-ms-publictraffictype: Email x-ms-office365-filtering-correlation-id: 4b37f17b-9a0e-4fa7-98fc-08d965d51c18 x-ms-traffictypediagnostic: DM5PR04MB1005: x-microsoft-antispam-prvs: wdcipoutbound: EOP-TRUE 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:DM6PR04MB7081.namprd04.prod.outlook.com;PTR:;CAT:NONE;SFS:(4636009)(366004)(2906002)(508600001)(33656002)(5660300002)(83380400001)(55016002)(8676002)(316002)(8936002)(9686003)(6506007)(53546011)(110136005)(52536014)(122000001)(66446008)(64756008)(66556008)(71200400001)(66476007)(66946007)(7696005)(186003)(38070700005)(91956017)(76116006)(38100700002)(86362001);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: DM6PR04MB7081.namprd04.prod.outlook.com X-MS-Exchange-CrossTenant-Network-Message-Id: 4b37f17b-9a0e-4fa7-98fc-08d965d51c18 X-MS-Exchange-CrossTenant-originalarrivaltime: 23 Aug 2021 01:27:02.2294 (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: PP2+okn1msCwr609ME6/cut2KSGjLyl78If3CCO/NbGl76OLf092en8//AXZ27QpE98FHx0TiDFPg/OwnfHNag== X-MS-Exchange-Transport-CrossTenantHeadersStamped: DM5PR04MB1005 Precedence: bulk List-ID: X-Mailing-List: linux-block@vger.kernel.org On 2021/08/12 16:50, Damien Le Moal wrote:=0A= > Single LUN multi-actuator hard-disks are cappable to seek and execute=0A= > multiple commands in parallel. This capability is exposed to the host=0A= > using the Concurrent Positioning Ranges VPD page (SCSI) and Log (ATA).=0A= > Each positioning range describes the contiguous set of LBAs that an=0A= > actuator serves.=0A= > =0A= > This series adds support the scsi disk driver to retreive this=0A= > information and advertize it to user space through sysfs. libata is also= =0A= > modified to handle ATA drives.=0A= > =0A= > The first patch adds the block layer plumbing to expose concurrent=0A= > sector ranges of the device through sysfs as a sub-directory of the=0A= > device sysfs queue directory. Patch 2 and 3 add support to sd and=0A= > libata. Finally patch 4 documents the sysfs queue attributed changes.=0A= > Patch 5 fixes a typo in the document file (strictly speaking, not=0A= > related to this series).=0A= > =0A= > This series does not attempt in any way to optimize accesses to=0A= > multi-actuator devices (e.g. block IO scheduler or filesystems). This=0A= > initial support only exposes the actuators information to user space=0A= > through sysfs.=0A= =0A= Hi Jens,=0A= =0A= I do not see this queued in for-5.15/block. Anything holding this series up= ?=0A= =0A= Thanks !=0A= =0A= =0A= =0A= =0A= -- =0A= Damien Le Moal=0A= Western Digital Research=0A=