zfsonlinux/zfs — pull request #2530 by dweeezil (2014-07-24 12:48:11+00:00)
Title: Illumos 4368 4369

4369 implement zfs bookmarks
4368 zfs send filesystems from readonly pools
Reviewed by: Christopher Siden
Reviewed by: George Wilson
Approved by: Garrett D'Amore
Ported by: Tim Chase

Porting notes:

Added spa_feat_refcount_cache_lock to struct spa to protext
spa_feat_refcount_cache since zfsonlinux doesn't have an atomic_swap_64
to update it.