3956 ::vdev -r should work with pipelines
3957 ztest should update the cachefile before killing itself
3958 multiple scans can lead to partial resilvering
3959 ddt entries are not always resilvered
3960 dsl_scan can skip over dedup-ed blocks if physical birth != logical birth
3961 freed gang blocks are not resilvered and can cause pool to suspend
3962 ztest should print out zfs debug buffer before exiting
Reviewed by: Matthew Ahrens <mahrens@delphix.com>
Reviewed by: Adam Leventhal <ahl@delphix.com>

@@ -20,11 +20,11 @@
  */
 
 /*
  * Copyright (c) 2005, 2010, Oracle and/or its affiliates. All rights reserved.
  * Copyright 2011 Nexenta Systems, Inc. All rights reserved.
- * Copyright (c) 2012 by Delphix. All rights reserved.
+ * Copyright (c) 2013 by Delphix. All rights reserved.
  */
 
 #include <sys/spa.h>
 #include <sys/fm/fs/zfs.h>
 #include <sys/spa_impl.h>

@@ -196,11 +196,16 @@
         return (err);
 }
 
 /*
  * Synchronize pool configuration to disk.  This must be called with the
- * namespace lock held.
+ * namespace lock held. Synchronizing the pool cache is typically done after
+ * the configuration has been synced to the MOS. This exposes a window where
+ * the MOS config will have been updated but the cache file has not. If
+ * the system were to crash at that instant then the cached config may not
+ * contain the correct information to open the pool and an explicity import
+ * would be required.
  */
 void
 spa_config_sync(spa_t *target, boolean_t removing, boolean_t postsysevent)
 {
         spa_config_dirent_t *dp, *tdp;