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Mon, 12 Apr 2021 17:57:48 +0000 From: Chaitanya Kulkarni To: Jens Axboe CC: Max Gurtovoy , "linux-block@vger.kernel.org" , "martin.petersen@oracle.com" , "oren@nvidia.com" , "idanb@nvidia.com" , "yossike@nvidia.com" , Damien Le Moal Subject: Re: [PATCH v2 1/1] null_blk: add option for managing virtual boundary Thread-Topic: [PATCH v2 1/1] null_blk: add option for managing virtual boundary Thread-Index: AQHXL4IH//8VvIQ5WEWHcDMIIkRegg== Date: Mon, 12 Apr 2021 17:57:48 +0000 Message-ID: References: <20210412095523.278632-1-mgurtovoy@nvidia.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-originating-ip: [199.255.45.62] x-ms-publictraffictype: Email x-ms-office365-filtering-correlation-id: b2447290-2167-4407-0a64-08d8fddc7bc7 x-ms-traffictypediagnostic: SJ0PR04MB7567: x-ms-exchange-transport-forked: True x-microsoft-antispam-prvs: wdcipoutbound: EOP-TRUE x-ms-oob-tlc-oobclassifiers: OLM:5236; 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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: b2447290-2167-4407-0a64-08d8fddc7bc7 X-MS-Exchange-CrossTenant-originalarrivaltime: 12 Apr 2021 17:57:48.1730 (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: BOyR759NhTqrk060/OoojrcaqFw9mVEDTyXbVI7V3bzdPk97GiyjG7PaOfHlUG76yrxmMFSldl/vKmdBP5DS47EfpjcHWsDEy7eZEiyNQPo= X-MS-Exchange-Transport-CrossTenantHeadersStamped: SJ0PR04MB7567 Precedence: bulk List-ID: X-Mailing-List: linux-block@vger.kernel.org Jens,=0A= =0A= On 4/12/21 05:48, Jens Axboe wrote:=0A= > On 4/12/21 3:55 AM, Max Gurtovoy wrote:=0A= >> This will enable changing the virtual boundary of null blk devices. For= =0A= >> now, null blk devices didn't have any restriction on the scatter/gather= =0A= >> elements received from the block layer. Add a module parameter and a=0A= >> configfs option that will control the virtual boundary. This will=0A= >> enable testing the efficiency of the block layer bounce buffer in case= =0A= >> a suitable application will send discontiguous IO to the given device.= =0A= > Applied, thanks.=0A= >=0A= =0A= If this is still on the top and can be done easily please add.=0A= =0A= Reviewed-by: Chaitanya Kulkarni =0A= =0A= =0A=