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Sat, 15 Feb 2020 03:20:32 +0000 From: Chaitanya Kulkarni To: Alexey Dobriyan , "axboe@kernel.dk" CC: "linux-block@vger.kernel.org" Subject: Re: [PATCH] null_blk: fix spurious IO errors after failed past-wp access Thread-Topic: [PATCH] null_blk: fix spurious IO errors after failed past-wp access Thread-Index: AQHV4eJLw22qyEV6Fk6EkV++6gr6jw== Date: Sat, 15 Feb 2020 03:20:32 +0000 Message-ID: References: <20200212202320.GA2704@avx2> 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=Chaitanya.Kulkarni@wdc.com; x-originating-ip: [199.255.45.62] x-ms-publictraffictype: Email x-ms-office365-filtering-ht: Tenant x-ms-office365-filtering-correlation-id: 0d2f3503-f4c0-4b93-677b-08d7b1c6044b x-ms-traffictypediagnostic: DM6PR04MB4828: x-microsoft-antispam-prvs: wdcipoutbound: EOP-TRUE x-ms-oob-tlc-oobclassifiers: OLM:8273; x-forefront-prvs: 03142412E2 x-forefront-antispam-report: SFV:NSPM;SFS:(10019020)(4636009)(366004)(39860400002)(396003)(136003)(376002)(346002)(189003)(199004)(478600001)(71200400001)(64756008)(66556008)(66446008)(33656002)(55016002)(86362001)(53546011)(76116006)(6506007)(66946007)(26005)(91956017)(4326008)(4744005)(186003)(9686003)(66476007)(2906002)(316002)(110136005)(81156014)(52536014)(8676002)(8936002)(5660300002)(81166006)(7696005);DIR:OUT;SFP:1102;SCL:1;SRVR:DM6PR04MB4828;H:DM6PR04MB5754.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: JwsNYPnabJpyH5hqLg3LL2375a7rccDMnfOz8sjSfWZapyHKZgnmhl17FZllWk3JrxDBVWdf5ZF3MK902RtdODT4ouNdfI/zxdjvHRWsnOG6o8fBz9qYNYKk/WdRDgpemeFo9gWEdZmdZj7Du5VfY7bNXmyxmYDrsgdEYCKHpc9GL+HgQciW7O/TAG2qogtAbgfLhir/MoBjqUU6BCi728CIfIr7uoOgFnoi4j/YeMvYdA4Sy0qaJmMdhgc2yxvtW5Ri9ZY83D9O240Ft9FN7F5ETASpjAw2IenlyfZF/vZtl0SjV4IpSTasyU8rwXm4zqBowwJKRBKfsc0ZcAc7XNSGKojlp/b8HavLICOGwtI7gRz18tZPNbI37GUzxYoUAbrlyhp/xvMVkOTYodkyUdLH+Ev2o6gsIR9dubn5w1qNc0LkY0jfAr/NPIh+DT/y x-ms-exchange-antispam-messagedata: 7Hko6//ECk7vW4Aby04sSR1w+iahmHIJnqRoFSbVpAdOOpcpYD9lw1xO8SBW7ybRkdgl4y0sr9+6xcO411cilKcloFGU0FgFj2um6re41iAjANIVoMAXclISfK180Rt2VppIr3woBxANNxfmE14AGQ== x-ms-exchange-transport-forked: True 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: 0d2f3503-f4c0-4b93-677b-08d7b1c6044b X-MS-Exchange-CrossTenant-originalarrivaltime: 15 Feb 2020 03:20:32.6797 (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: FZTqUubC4uyCYuhty1qysc1G/8DR3IWCGYSEcIKNnpgZy9qGBrDaDZpeZU7+ZfbbXwXNS9rTxLx6JE1r2IfogDFcVS4/U6Hy0in0cLM/CiY= X-MS-Exchange-Transport-CrossTenantHeadersStamped: DM6PR04MB4828 Sender: linux-block-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-block@vger.kernel.org Alexey, thanks for the patch however the description is=0A= not simple to understand.=0A= =0A= I just sent a patch with a description and the test result.=0A= =0A= On 02/12/2020 12:23 PM, Alexey Dobriyan wrote:=0A= > Steps to reproduce:=0A= >=0A= > BLKRESETZONE zone 0=0A= >=0A= > // force EIO=0A= > pwrite(fd, buf, 4096, 4096);=0A= >=0A= > [issue more IO including zone ioctls]=0A= >=0A= > It will start failing randomly including IO to unrelated zones because of= =0A= > ->error "reuse". Trigger can be partition detection as well if test is no= t=0A= > run immediately which is even more entertaining.=0A= >=0A= > The fix is of course to clear ->error where necessary.=0A= >=0A= > Signed-off-by: Alexey Dobriyan (SK hynix)=0A= > ---=0A= >=0A= > drivers/block/null_blk_main.c | 2 ++=0A= =0A=