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Re: [dm-devel] [PATCH 3/6] sd: implement the Persistent Reservation API

From Christoph Hellwig <hch@lst.de>
Newsgroups linux.kernel
Subject Re: [dm-devel] [PATCH 3/6] sd: implement the Persistent Reservation API
Date 2015-10-15 17:40 +0200
Message-ID <qjSNk-2aP-21@gated-at.bofh.it> (permalink)
References <qjPFL-68P-9@gated-at.bofh.it> <qjPFL-68P-7@gated-at.bofh.it> <qjSNk-2aP-23@gated-at.bofh.it>
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On Thu, Oct 15, 2015 at 08:30:50AM -0700, Bart Van Assche wrote:
> Can you explain why this functionality has been added to the sd driver 
> instead of the SCSI core ? Aren't persistent reservations a concept that 
> applies to all SCSI device types ?

In theory it does.  In practice it's only used by disks/arrays and tapes,
and as tapes don't have a struct block_device this isn't going to be useful
for them.
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[PATCH 3/6] sd: implement the Persistent Reservation API Christoph Hellwig <hch@lst.de> - 2015-10-15 14:20 +0200
  Re: [dm-devel] [PATCH 3/6] sd: implement the Persistent  Reservation API Christoph Hellwig <hch@lst.de> - 2015-10-15 17:40 +0200

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