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Fri, 13 Sep 2019 22:37:24 +0000 From: Chaitanya Kulkarni To: Bart Van Assche , =?iso-8859-1?Q?Andr=E9_Almeida?= , "linux-block@vger.kernel.org" , "linux-doc@vger.kernel.org" , "linux-kernel@vger.kernel.org" CC: "corbet@lwn.net" , "axboe@kernel.dk" , "kernel@collabora.com" , "krisman@collabora.com" Subject: Re: [PATCH v2 1/4] null_blk: do not fail the module load with zero devices Thread-Topic: [PATCH v2 1/4] null_blk: do not fail the module load with zero devices Thread-Index: AQHVan85AifiRz+yRUqzbl6jvX3qQA== Date: Fri, 13 Sep 2019 22:37:23 +0000 Message-ID: References: <20190913220300.422869-1-andrealmeid@collabora.com> <20190913220300.422869-2-andrealmeid@collabora.com> <7c0f4547-4193-bd3e-85c6-d950a004ac46@acm.org> 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-correlation-id: 82b69170-f7d1-4d55-3902-08d7389af2a4 x-ms-office365-filtering-ht: Tenant x-microsoft-antispam: BCL:0;PCL:0;RULEID:(2390118)(7020095)(4652040)(8989299)(4534185)(4627221)(201703031133081)(201702281549075)(8990200)(5600166)(711020)(4605104)(1401327)(4618075)(2017052603328)(7193020);SRVR:BYAPR04MB4550; 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charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable MIME-Version: 1.0 X-OriginatorOrg: wdc.com X-MS-Exchange-CrossTenant-Network-Message-Id: 82b69170-f7d1-4d55-3902-08d7389af2a4 X-MS-Exchange-CrossTenant-originalarrivaltime: 13 Sep 2019 22:37:23.8215 (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: o60mFgev9ke0qyDkHv7UZeKI3rtnW9OpFYLatALGZ0TCL2Zw99HGyFTq/bINX8dfUxiPdJ+KQa9fe26j1GLf4horkeA69RUs5lyw5BIBLXw= X-MS-Exchange-Transport-CrossTenantHeadersStamped: BYAPR04MB4550 Sender: linux-block-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-block@vger.kernel.org On 09/13/2019 03:18 PM, Bart Van Assche wrote:=0A= > I just noticed that this patch is necessary to unbreak blktests. The srp= =0A= > tests fail as follows with Jens' for-next branch:=0A= >=0A= > modprobe: ERROR: could not insert 'null_blk': Invalid argument=0A= >=0A= > I think that error is triggered by the following statement in=0A= > common/multipath-over-rdma:=0A= >=0A= > modprobe null_blk nr_devices=3D0 || return $?=0A= >=0A= > Bart.=0A= >=0A= =0A= Not only that I'm sure my membacked null_blk testcases will also start=0A= failing without this patch, which I've not posted on mailing list yet.=0A= =0A=