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Sun, 18 Apr 2021 04:48:23 +0000 From: Chaitanya Kulkarni To: Jens Axboe CC: "linux-block@vger.kernel.org" Subject: Re: [PATCH] null_blk: poll queue support Thread-Topic: [PATCH] null_blk: poll queue support Thread-Index: AQHXM56KmL6kCanFwEqXUyQ/m0BBrQ== Date: Sun, 18 Apr 2021 04:48:23 +0000 Message-ID: References: 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-originating-ip: [199.255.45.62] x-ms-publictraffictype: Email x-ms-office365-filtering-correlation-id: 4f220ea1-25a5-4bbc-8b32-08d9022532be x-ms-traffictypediagnostic: BYAPR04MB4325: x-microsoft-antispam-prvs: wdcipoutbound: EOP-TRUE x-ms-oob-tlc-oobclassifiers: OLM:4502; x-ms-exchange-senderadcheck: 1 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:BYAPR04MB4965.namprd04.prod.outlook.com;PTR:;CAT:NONE;SFS:(4636009)(346002)(376002)(366004)(396003)(136003)(39860400002)(26005)(186003)(38100700002)(122000001)(6916009)(86362001)(66946007)(7696005)(66556008)(66476007)(33656002)(76116006)(2906002)(6506007)(53546011)(66446008)(316002)(64756008)(478600001)(4744005)(71200400001)(55016002)(8936002)(4326008)(9686003)(8676002)(5660300002)(52536014);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: BYAPR04MB4965.namprd04.prod.outlook.com X-MS-Exchange-CrossTenant-Network-Message-Id: 4f220ea1-25a5-4bbc-8b32-08d9022532be X-MS-Exchange-CrossTenant-originalarrivaltime: 18 Apr 2021 04:48:23.6780 (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: fsrR0eBwAw43WXrn5CZZRxSskaU1BR7OGuMefiCWfIw0IMSMlu0nbAWzFdNhB8GZeGHC75Z1j2tNpG9zx7qpx34C+gcI+r6wTzmcslmPWHs= X-MS-Exchange-Transport-CrossTenantHeadersStamped: BYAPR04MB4325 Precedence: bulk List-ID: X-Mailing-List: linux-block@vger.kernel.org On 4/17/21 08:30, Jens Axboe wrote:=0A= > There's currently no way to experiment with polled IO with null_blk,=0A= > which seems like an oversight. This patch adds support for polled IO.=0A= > We keep a list of issued IOs on submit, and then process that list=0A= > when mq_ops->poll() is invoked.=0A= >=0A= > A new parameter is added, poll_queues. It defaults to 1 like the=0A= > submit queues, meaning we'll have 1 poll queue available.=0A= >=0A= > Signed-off-by: Jens Axboe =0A= =0A= =0A= Looks good.=0A= =0A= Reviewed-by: Chaitanya Kulkarni =0A= =0A= =0A= =0A=