[PATCH 1/2] nvme-apple: Only limit admin queue tag space when with Linear SQ is present

[Christoph Hellwig]

On Sat, Jun 06, 2026 at 09:25:25PM +0800, Nick Chan wrote:
> Apple NVMe controllers require tags of pending commands to not be shared
> across admin and IO queues. However, on Apple A11 without linear SQ, it is
> not possible for either queue to skip over some tags and must go from 0 to
> the configured maximum before wrapping around.
> 
> As a result, in order to prevent tag collision, dynamic tag reservation
> while a command is in-flight becomes necessary. In this context, there is
> no reason to limit the admin queue's tag space, as it is not helpful in
> preventing tag collision.

I'm not really into these Apple specific, but what does
"dynamic tag reservation" mean here?