linux-kernel - Re: [RFC PATCH] scsi, block: fix duplicate bdi name registration crashes

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Date:   Wed, 1 Feb 2017 09:07:36 +0100
From:   Christoph Hellwig <hch@....de>
To:     Dan Williams <dan.j.williams@...el.com>
Cc:     Christoph Hellwig <hch@....de>,
        "Martin K. Petersen" <martin.petersen@...cle.com>,
        Jens Axboe <axboe@...nel.dk>, linux-block@...r.kernel.org,
        linux-scsi <linux-scsi@...r.kernel.org>,
        "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
        James Bottomley <James.Bottomley@...senpartnership.com>,
        Bart Van Assche <bart.vanassche@...disk.com>,
        Omar Sandoval <osandov@...ndov.com>
Subject: Re: [RFC PATCH] scsi, block: fix duplicate bdi name registration
        crashes

On Mon, Jan 30, 2017 at 01:53:36PM -0800, Dan Williams wrote:
> On Mon, Jan 30, 2017 at 4:24 AM, Christoph Hellwig <hch@....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.

Mostly old floppy drivers.