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Re: Persistent Reservation API V2

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On Thu, Aug 20, 2015 at 11:56:36PM +0000, Keith Busch wrote:

> NVMe can also specify
> if whether or not a reservation should persist through power-loss.

SCSI does as well, it's the APTPL flag.  However reservations not persistent
through a power loss are basically useless, so I decided to force them on
in the API.  From the documentation:

"All implementations are expected to ensure the reservations survive
 a power loss"

So I would prefer not to add it, or if we really have to as a negative flag
to specifically opt out of the APTPL behavior.

> with it. For example, NVMe can ignore existing keys when acquiring a
> reservation in addition to registering a new key.

This sounds like a sensible addition to me, and I wouldn't be surprised
if future SPC versions will add this flag.
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Re: Persistent Reservation API V2 Keith Busch <keith.busch@intel.com> - 2015-08-21 02:00 +0200
  Re: Persistent Reservation API V2 Christoph Hellwig <hch@lst.de> - 2015-08-21 09:10 +0200

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