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From: Dan Williams <dan.j.williams@intel.com>
Date: Mon, 30 Jan 2017 13:53:36 -0800
Message-ID: <CAPcyv4jJ5VMNueBTkYhTS=DmAQVDT6qJV0Do86ZNVGLGoTJ=gQ@mail.gmail.com>
Subject: Re: [RFC PATCH] scsi, block: fix duplicate bdi name registration crashes
To: Christoph Hellwig <hch@lst.de>
Cc: "Martin K. Petersen" <martin.petersen@oracle.com>,
        Jens Axboe <axboe@kernel.dk>, linux-block@vger.kernel.org,
        linux-scsi <linux-scsi@vger.kernel.org>,
        "linux-kernel@vger.kernel.org" <linux-kernel@vger.kernel.org>,
        James Bottomley <James.Bottomley@hansenpartnership.com>,
        Bart Van Assche <bart.vanassche@sandisk.com>,
        Omar Sandoval <osandov@osandov.com>
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On Mon, Jan 30, 2017 at 4:24 AM, Christoph Hellwig <hch@lst.de> wrote:
> Hi Dan,
>
> this looks mostly fine to me.  A few code comments below, but except
> for this there is another issue with it:  We still have drivers
> that share a single request_queue for multiple gendisks, so I wonder

scsi drivers or others? If those drivers can switch to dynamically
allocated devt (GENHD_FL_EXT_DEVT), then they don't need this fix.