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Fri, 17 Apr 2020 19:25:06 +0000 From: Chaitanya Kulkarni To: Kai-Heng Feng , "kbusch@kernel.org" , "axboe@fb.com" , "hch@lst.de" , "sagi@grimberg.me" CC: "open list:NVM EXPRESS DRIVER" , linux-stable , open list Subject: Re: [PATCH] nvme/pci: Use Discard instead of Write Zeroes on SK hynix SC300 Thread-Topic: [PATCH] nvme/pci: Use Discard instead of Write Zeroes on SK hynix SC300 Thread-Index: AQHWFJNgC1T1D2C2k0C8UtF2YjQiRQ== Date: Fri, 17 Apr 2020 19:25:06 +0000 Message-ID: References: <20200417083641.28205-1-kai.heng.feng@canonical.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=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: 8f25680c-08ac-4750-2968-08d7e305097f x-ms-traffictypediagnostic: BYAPR04MB5509: x-microsoft-antispam-prvs: wdcipoutbound: EOP-TRUE x-ms-oob-tlc-oobclassifiers: OLM:191; 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charset="us-ascii" Content-Transfer-Encoding: quoted-printable MIME-Version: 1.0 X-OriginatorOrg: wdc.com X-MS-Exchange-CrossTenant-Network-Message-Id: 8f25680c-08ac-4750-2968-08d7e305097f X-MS-Exchange-CrossTenant-originalarrivaltime: 17 Apr 2020 19:25:06.8465 (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: j9Z1Kwr7dNOv+6ar0iiH+mDpdGwu2iP1JSWDm89FmfX2pXDdDed7f8NN4dIX3FRX41u8FlQGNFYh0HVHk/hi8aNnfzZ2bZq952r5lwzRqTk= X-MS-Exchange-Transport-CrossTenantHeadersStamped: BYAPR04MB5509 Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On 04/17/2020 01:37 AM, Kai-Heng Feng wrote:=0A= > After commit 6e02318eaea5 ("nvme: add support for the Write Zeroes=0A= > command"), SK hynix SC300 becomes very slow with the following error=0A= > message:=0A= > [ 224.567695] blk_update_request: operation not supported error, dev nvm= e1n1, sector 499384320 op 0x9:(WRITE_ZEROES) flags 0x1000000 phys_seg 0 pri= o class 0]=0A= >=0A= > Use quirk NVME_QUIRK_DEALLOCATE_ZEROES to workaround this issue.=0A= Can you share=0A= nvme id-ctrl -H /dev/nvme0 | grep oncs -A 8=0A= output?=0A= =0A=