3740 Poor ZFS send / receive performance due to snapshot hold / release processing
Submitted by: Steven Hartland <steven.hartland@multiplay.co.uk>

*** 20,29 ****
--- 20,30 ----
   */
  /*
   * Copyright (c) 2005, 2010, Oracle and/or its affiliates. All rights reserved.
   * Copyright (c) 2012 by Delphix. All rights reserved.
   * Copyright 2011 Nexenta Systems, Inc.  All rights reserved.
+  * Copyright (c) 2013 Steven Hartland. All rights reserved.
   */
  
  /*
   * The objective of this program is to provide a DMU/ZAP/SPA stress test
   * that runs entirely in userland, is easy to use, and easy to extend.
*** 4709,4719 ****
                      fullname, error);
          }
  
          error = user_release_one(fullname, tag);
          if (error)
!                 fatal(0, "user_release_one(%s)", fullname, tag);
  
          VERIFY3U(dmu_objset_hold(fullname, FTAG, &origin), ==, ENOENT);
  
  out:
          (void) rw_unlock(&ztest_name_lock);
--- 4710,4720 ----
                      fullname, error);
          }
  
          error = user_release_one(fullname, tag);
          if (error)
!                 fatal(0, "user_release_one(%s, %s) = %d", fullname, tag, error);
  
          VERIFY3U(dmu_objset_hold(fullname, FTAG, &origin), ==, ENOENT);
  
  out:
          (void) rw_unlock(&ztest_name_lock);