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

*** 1,8 ****
--- 1,9 ----
  /*
   * Copyright (c) 2007, 2010, Oracle and/or its affiliates. All rights reserved.
   * Copyright (c) 2013 by Delphix. All rights reserved.
+  * Copyright (c) 2013 Steven Hartland. All rights reserved.
   */
  
  /*
   * BSD 3 Clause License
   *
*** 201,211 ****
                  zfs_close(zhp);
                  return (-1);
          }
  
          p = strchr(snapname, '@') + 1;
!         if (zfs_hold(zhp, p, jname, recursive, B_FALSE, cleanup_fd) != 0) {
                  NDMP_LOG(LOG_ERR, "Cannot hold snapshot %s", p);
                  zfs_close(zhp);
                  return (-1);
          }
          zfs_close(zhp);
--- 202,212 ----
                  zfs_close(zhp);
                  return (-1);
          }
  
          p = strchr(snapname, '@') + 1;
!         if (zfs_hold(zhp, p, jname, recursive, cleanup_fd) != 0) {
                  NDMP_LOG(LOG_ERR, "Cannot hold snapshot %s", p);
                  zfs_close(zhp);
                  return (-1);
          }
          zfs_close(zhp);