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Wong" , Hannes Reinecke Subject: Re: [PATCH v3 2/2] zonefs: Add documentation Thread-Topic: [PATCH v3 2/2] zonefs: Add documentation Thread-Index: AQHVuf7Aj/1RgKnKOE6js//cNKXmzQ== Date: Wed, 25 Dec 2019 06:40:29 +0000 Message-ID: References: <20191224020615.134668-1-damien.lemoal@wdc.com> <20191224020615.134668-3-damien.lemoal@wdc.com> Accept-Language: en-US Content-Language: en-US X-MS-Has-Attach: X-MS-TNEF-Correlator: authentication-results: spf=none (sender IP is ) smtp.mailfrom=Damien.LeMoal@wdc.com; x-originating-ip: [199.255.47.7] x-ms-publictraffictype: Email x-ms-office365-filtering-ht: Tenant x-ms-office365-filtering-correlation-id: e65f9052-404e-4369-517e-08d789055515 x-ms-traffictypediagnostic: BYAPR04MB3782: x-ms-exchange-transport-forked: True x-microsoft-antispam-prvs: wdcipoutbound: EOP-TRUE x-ms-oob-tlc-oobclassifiers: OLM:6790; x-forefront-prvs: 02622CEF0A x-forefront-antispam-report: SFV:NSPM;SFS:(10019020)(4636009)(396003)(39860400002)(346002)(136003)(376002)(366004)(189003)(199004)(81166006)(478600001)(9686003)(91956017)(33656002)(76116006)(7696005)(6506007)(26005)(53546011)(8936002)(8676002)(81156014)(71200400001)(5660300002)(66946007)(4744005)(86362001)(66446008)(55016002)(186003)(52536014)(4326008)(2906002)(66476007)(66556008)(54906003)(64756008)(110136005)(316002);DIR:OUT;SFP:1102;SCL:1;SRVR:BYAPR04MB3782;H:BYAPR04MB5816.namprd04.prod.outlook.com;FPR:;SPF:None;LANG:en;PTR:InfoNoRecords;MX:1;A:1; x-ms-exchange-senderadcheck: 1 x-microsoft-antispam: BCL:0; x-microsoft-antispam-message-info: BM/tJfHg+qYqkt9FLxrZS7R/lTxNAtnoSpvXiF/zyziqs0paUoMGjAogfqhq+Bv10lyRjxhaHFHlfMqEyFZuRQpiiYyMOoMG4t8PRrRDr2WRjou/ocIwk9FsnM/Y7fsQvfpG6Kzx1TA88xoXc38MVPAYka7ItHJD4RKVL8wkwzTogc42EWtDIicDykriYEvFumiwFr8JjOFpn6FFl+7gs0+Lmk87WoNZMlgzYzJps69Wj8xsdV+UkG8I22Ryx10V1aMFUXiips1zj/Eq87eeXlcJKrlw1Uv0Nz0Sv55D7SHY2NIJLPeYx9McJKruUzK+DC29Cf3yHNsKRKRMTb+1yQii1lwL6QZQnezpw8bZJb8PSMcPh4BjZW2WVlz/1/OX3LUFunA1LEGyiDhRf3eTXf7jgyFVa/WNNYZsjrDI98BM+rs+ySKaphqom+ELw3aL Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: quoted-printable MIME-Version: 1.0 X-OriginatorOrg: wdc.com X-MS-Exchange-CrossTenant-Network-Message-Id: e65f9052-404e-4369-517e-08d789055515 X-MS-Exchange-CrossTenant-originalarrivaltime: 25 Dec 2019 06:40:29.0737 (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: 7L961cvgvVvLX2+d7k4+hwPFUngnT66+F7U7cH7pspdgDKGAdwbAfzxBWCg2H+jiKX6IIgLi++APF3JXEQi/Dw== X-MS-Exchange-Transport-CrossTenantHeadersStamped: BYAPR04MB3782 Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On 2019/12/25 10:33, Randy Dunlap wrote:=0A= [...]=0A= >> +For sequential write zone files, the file size changes as data is appen= ded at=0A= >> +the end of the file, similarly to any regular file system.=0A= >> +=0A= >> +# dd if=3D/dev/zero of=3D/mnt/seq/0 bs=3D4096 count=3D1 conv=3Dnotrunc = oflag=3Ddirect=0A= >> +1+0 records in=0A= >> +1+0 records out=0A= >> +4096 bytes (4.1 kB, 4.0 KiB) copied, 1.05112 s, 3.9 kB/s=0A= > =0A= > why so slow?=0A= > =0A= >> +=0A= >> +# ls -l /mnt/seq/0=0A= >> +-rw-r----- 1 root root 4096 Nov 25 13:23 /mnt/sdh/seq/0=0A= > =0A= > I don't understand the "sdh/" here. Please explain for me (not necessaril= y=0A= > in the doc file).=0A= =0A= The drive I used for generating the example was /dev/sdh and it was in=0A= fact mounted under /mnt/sdh/ for the test, but I removed "sdh" from the=0A= pasted commands and results to make things simpler. I forgot to remove=0A= the drive name on this line. Fixed now.=0A= =0A= Thank you for the review.=0A= =0A= -- =0A= Damien Le Moal=0A= Western Digital Research=0A=