Re: [PATCH] block: all zones zone management operations

On Thu, Mar 26, 2020 at 01:30:12PM +0900, Damien Le Moal wrote:

Similarly to the zone write pointer reset operation (REQ_OP_ZONE_RESET),
the zone open, close and finish operations can operate on all zones of a
ZBC or ZAC SMR disk by setting the all bit of the command. Compared to a
loop issuing a request for every zone of the device, the device based
processing of an all zone operation is several orders of magnitude
faster.

What is the point?  None of these actually seem like remotely useful
operations.  Why would I ever want to open or finish all zones?