kern/146471: commit references a PR

[dfilter service]

The following reply was made to PR kern/146471; it has been noted by GNATS.

From: dfilter at FreeBSD.ORG (dfilter service)
To: bug-followup at FreeBSD.org
Cc:  
Subject: Re: kern/146471: commit references a PR
Date: Tue, 11 May 2010 09:19:55 +0000 (UTC)

 Author: mm
 Date: Tue May 11 09:19:41 2010
 New Revision: 207909
 URL: http://svn.freebsd.org/changeset/base/207909
 
 Log:
   Fix zfs rename (may occasionally fail with dataset busy).
   
   OpenSolaris onnv revision:	8517:41a0783dde17
   
   PR:		kern/146471
   Approved by:	pjd, delphij (mentor)
   Obtained from:	OpenSolaris (Bug ID 6784757)
   MFC after:	3 days
 
 Modified:
   head/sys/cddl/contrib/opensolaris/uts/common/fs/zfs/dsl_dataset.c
 
 Modified: head/sys/cddl/contrib/opensolaris/uts/common/fs/zfs/dsl_dataset.c
 ==============================================================================
 --- head/sys/cddl/contrib/opensolaris/uts/common/fs/zfs/dsl_dataset.c	Tue May 11 07:25:13 2010	(r207908)
 +++ head/sys/cddl/contrib/opensolaris/uts/common/fs/zfs/dsl_dataset.c	Tue May 11 09:19:41 2010	(r207909)
 @@ -19,7 +19,7 @@
   * CDDL HEADER END
   */
  /*
 - * Copyright 2008 Sun Microsystems, Inc.  All rights reserved.
 + * Copyright 2009 Sun Microsystems, Inc.  All rights reserved.
   * Use is subject to license terms.
   */
  
 @@ -2205,6 +2205,12 @@ dsl_dataset_rename(char *oldname, const 
  	err = dsl_dir_open(oldname, FTAG, &dd, &tail);
  	if (err)
  		return (err);
 +	/*
 +	 * If there are more than 2 references there may be holds
 +	 * hanging around that haven't been cleared out yet.
 +	 */
 +	if (dmu_buf_refcount(dd->dd_dbuf) > 2)
 +		txg_wait_synced(dd->dd_pool, 0);
  	if (tail == NULL) {
  		int delta = strlen(newname) - strlen(oldname);
  
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