4374 dn_free_ranges should use range_tree_t
Reviewed by: George Wilson <george.wilson@delphix.com>
Reviewed by: Max Grossman <max.grossman@delphix.com>
Reviewed by: Christopher Siden <christopher.siden@delphix.com
Reviewed by: Garrett D'Amore <garrett@damore.org>
Reviewed by: Dan McDonald <danmcd@omniti.com>
Approved by: Dan McDonald <danmcd@omniti.com>

*** 20,30 ****
   */
  
  /*
   * Copyright (c) 2005, 2010, Oracle and/or its affiliates. All rights reserved.
   * Copyright 2011 Nexenta Systems, Inc.  All rights reserved.
!  * Copyright (c) 2013 by Delphix. All rights reserved.
   */
  
  #include <sys/zfs_context.h>
  #include <sys/fm/fs/zfs.h>
  #include <sys/spa.h>
--- 20,30 ----
   */
  
  /*
   * Copyright (c) 2005, 2010, Oracle and/or its affiliates. All rights reserved.
   * Copyright 2011 Nexenta Systems, Inc.  All rights reserved.
!  * Copyright (c) 2011, 2014 by Delphix. All rights reserved.
   */
  
  #include <sys/zfs_context.h>
  #include <sys/fm/fs/zfs.h>
  #include <sys/spa.h>
*** 1551,1561 ****
  vdev_metaslab_set_size(vdev_t *vd)
  {
          /*
           * Aim for roughly 200 metaslabs per vdev.
           */
!         vd->vdev_ms_shift = highbit(vd->vdev_asize / 200);
          vd->vdev_ms_shift = MAX(vd->vdev_ms_shift, SPA_MAXBLOCKSHIFT);
  }
  
  void
  vdev_dirty(vdev_t *vd, int flags, void *arg, uint64_t txg)
--- 1551,1561 ----
  vdev_metaslab_set_size(vdev_t *vd)
  {
          /*
           * Aim for roughly 200 metaslabs per vdev.
           */
!         vd->vdev_ms_shift = highbit64(vd->vdev_asize / 200);
          vd->vdev_ms_shift = MAX(vd->vdev_ms_shift, SPA_MAXBLOCKSHIFT);
  }
  
  void
  vdev_dirty(vdev_t *vd, int flags, void *arg, uint64_t txg)