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Petersen" , Sreekanth Reddy , Damien Le Moal , "linux-scsi@vger.kernel.org" Subject: Re: [PATCH] scsi: sd_zbc: update write pointer offset cache Thread-Topic: [PATCH] scsi: sd_zbc: update write pointer offset cache Thread-Index: AQHXFZJ9Q2LbIxWjkkW7HLcT3Xe81Kp/x/IA Date: Fri, 12 Mar 2021 04:38:29 +0000 Message-ID: <20210312043828.kl2olk2d7awfsi7j@shindev.dhcp.fujisawa.hgst.com> References: <3cfebe48d09db73041b7849be71ffbcec7ee40b3.1615369586.git.johannes.thumshirn@wdc.com> <2a68a06c-7bcf-337d-b819-9e8f63f5e68c@acm.org> <87928742-6bba-1db1-1ee2-4d62188b2cbb@acm.org> In-Reply-To: Accept-Language: en-US Content-Language: en-US X-MS-Has-Attach: X-MS-TNEF-Correlator: authentication-results: wdc.com; dkim=none (message not signed) header.d=none;wdc.com; dmarc=none action=none header.from=wdc.com; x-originating-ip: [129.253.182.60] x-ms-publictraffictype: Email x-ms-office365-filtering-ht: Tenant x-ms-office365-filtering-correlation-id: da0ad525-51aa-4845-9955-08d8e510af3b x-ms-traffictypediagnostic: SJ0PR04MB7376: x-ms-exchange-transport-forked: True x-microsoft-antispam-prvs: wdcipoutbound: EOP-TRUE x-ms-oob-tlc-oobclassifiers: OLM:2201; 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charset="us-ascii" Content-ID: Content-Transfer-Encoding: quoted-printable MIME-Version: 1.0 X-OriginatorOrg: wdc.com X-MS-Exchange-CrossTenant-AuthAs: Internal X-MS-Exchange-CrossTenant-AuthSource: BYAPR04MB3800.namprd04.prod.outlook.com X-MS-Exchange-CrossTenant-Network-Message-Id: da0ad525-51aa-4845-9955-08d8e510af3b X-MS-Exchange-CrossTenant-originalarrivaltime: 12 Mar 2021 04:38:29.3802 (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: 4JCOLmr042WtwxZ84sL+9Wr9j5EfGBOQvB2MhO6hT9CoR0F7kanuDG0sHXV+/JhU+xalP4KbSNnaCs2Y3ml5u3S+Wk9jA+gfHu2hh3H3dek= X-MS-Exchange-Transport-CrossTenantHeadersStamped: SJ0PR04MB7376 Precedence: bulk List-ID: X-Mailing-List: linux-scsi@vger.kernel.org On Mar 11, 2021 / 15:54, Johannes Thumshirn wrote: > On 11/03/2021 16:48, Bart Van Assche wrote: > > On 3/11/21 7:18 AM, Johannes Thumshirn wrote: > >> On 11/03/2021 16:13, Bart Van Assche wrote: > >>> On 3/10/21 1:48 AM, Johannes Thumshirn wrote: > >>>> Recent changes [ ... ] > >>> > >>> Please add Fixes: and/or Cc: stable tags as appropriate. > >> > >> I couldn't pin down the offending commit and I can't reproduce it loca= lly > >> as well, so I opted out of this. But it must be something between v5.1= 1 and v5.12-rc2. > >=20 > > That's weird. Did Shinichiro use a HBA? Could this be the result of a > > behavior change in the HBA driver? >=20 > Yes I've looked at the commits in mpt3sas, but can't really pinpoint the= =20 > offending commit TBH. 664f0dce2058 ("scsi: mpt3sas: Add support for share= d=20 > host tagset for CPU hotplug") is the only one that /looks/ as if it could > be causing it, but I don't know mpt3sas well enough. >=20 > FWIW added Sreekanth The WARNING was found in kernel v5.12-rc2 test with a SAS SMR drive and HBA Broadcom 9400. It can be recreated by running blktests block/004 on the dri= ve (after reboot). It is also recreated with SATA SMR drive with the HBA, but = not observed with SATA drives connected to AHCI. I reverted the commit 664f0dce2058, then the WARNING disappeared. I suppose it indicates that the commit changed HBA driver behavior. --=20 Best Regards, Shin'ichiro Kawasaki=