NEX-9200 Improve the scalability of attribute locking in zfs_zget
Reviewed by: Joyce McIntosh <joyce.mcintosh@nexenta.com>
Reviewed by: Sanjay Nadkarni <sanjay.nadkarni@nexenta.com>
6385 Fix unlocking order in zfs_zget
Reviewed by: Brian Behlendorf <behlendorf1@llnl.gov>
Reviewed by: Matthew Ahrens <mahrens@delphix.com>
Reviewed by: Dan Kimmel <dan.kimmel@delphix.com>
Reviewed by: Andriy Gapon <avg@freebsd.org>
Approved by: Robert Mustacchi <rm@joyent.com>
5961 Fix stack overflow in zfs_create_fs
Reviewed by: George Wilson <george@delphix.com>
Reviewed by: Matthew Ahrens <mahrens@delphix.com>
Approved by: Dan McDonald <danmcd@omniti.com>
4370 avoid transmitting holes during zfs send
4371 DMU code clean up
Reviewed by: Matthew Ahrens <mahrens@delphix.com>
Reviewed by: George Wilson <george.wilson@delphix.com>
Reviewed by: Christopher Siden <christopher.siden@delphix.com>
Reviewed by: Josef 'Jeff' Sipek <jeffpc@josefsipek.net>
Approved by: Garrett D'Amore <garrett@damore.org>

*** 1747,1756 ****
--- 1747,1757 ----
          uint64_t        sense = ZFS_CASE_SENSITIVE;
          uint64_t        norm = 0;
          nvpair_t        *elem;
          int             error;
          int             i;
+         int size = spa_get_obj_mtx_sz(dmu_objset_spa(os));
          znode_t         *rootzp = NULL;
          zfsvfs_t        *zfsvfs;
          vnode_t         *vp;
          vattr_t         vattr;
          znode_t         *zp;
*** 1859,1869 ****
  
          mutex_init(&zfsvfs->z_znodes_lock, NULL, MUTEX_DEFAULT, NULL);
          list_create(&zfsvfs->z_all_znodes, sizeof (znode_t),
              offsetof(znode_t, z_link_node));
  
!         for (i = 0; i != ZFS_OBJ_MTX_SZ; i++)
                  mutex_init(&zfsvfs->z_hold_mtx[i], NULL, MUTEX_DEFAULT, NULL);
  
          rootzp->z_zfsvfs = zfsvfs;
          VERIFY(0 == zfs_acl_ids_create(rootzp, IS_ROOT_NODE, &vattr,
              cr, NULL, &acl_ids));
--- 1860,1872 ----
  
          mutex_init(&zfsvfs->z_znodes_lock, NULL, MUTEX_DEFAULT, NULL);
          list_create(&zfsvfs->z_all_znodes, sizeof (znode_t),
              offsetof(znode_t, z_link_node));
  
!         zfsvfs->z_hold_mtx_sz = size;
!         zfsvfs->z_hold_mtx = kmem_zalloc(sizeof (kmutex_t) * size, KM_SLEEP);
!         for (i = 0; i != size; i++)
                  mutex_init(&zfsvfs->z_hold_mtx[i], NULL, MUTEX_DEFAULT, NULL);
  
          rootzp->z_zfsvfs = zfsvfs;
          VERIFY(0 == zfs_acl_ids_create(rootzp, IS_ROOT_NODE, &vattr,
              cr, NULL, &acl_ids));
*** 1885,1896 ****
  
          error = zfs_create_share_dir(zfsvfs, tx);
  
          ASSERT(error == 0);
  
!         for (i = 0; i != ZFS_OBJ_MTX_SZ; i++)
                  mutex_destroy(&zfsvfs->z_hold_mtx[i]);
          kmem_free(zfsvfs, sizeof (zfsvfs_t));
  }
  
  #endif /* _KERNEL */
  
--- 1888,1901 ----
  
          error = zfs_create_share_dir(zfsvfs, tx);
  
          ASSERT(error == 0);
  
!         for (i = 0; i != size; i++)
                  mutex_destroy(&zfsvfs->z_hold_mtx[i]);
+ 
+         kmem_free(zfsvfs->z_hold_mtx, sizeof (kmutex_t) * size);
          kmem_free(zfsvfs, sizeof (zfsvfs_t));
  }
  
  #endif /* _KERNEL */