MFS r285915:

MFS r285915:
MFC r285767:

  nvd: set d_delmaxsize to full capacity of NVMe namespace

  The NVMe specification has no ability to specify a maximum delete size
  that is less than the full capacity of the namespace - so just using the
  namespace size is the correct value here.

  This fixes reported issues where ZFS trim on init looked like it was
  hanging the system - previously the default I/O max size (128KB on
  Intel NVMe controllers) was used for delete operations which worked out
  to only about 8MB/s.  With this patch I can add an 800GB DC P3700
  drive to a ZFS pool in about 15-20 seconds.

Approved by:	re (gjb)
Sponsored by:	Intel

git-svn-id: https://svn.freebsd.org/base/releng/10.2@285919 ccf9f872-aa2e-dd11-9fc8-001c23d0bc1f