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>

*** 4444,4454 ****
                          oldvd->vdev_devid = NULL;
                  }
          }
  
          /* mark the device being resilvered */
!         newvd->vdev_resilvering = B_TRUE;
  
          /*
           * If the parent is not a mirror, or if we're replacing, insert the new
           * mirror/replacing/spare vdev above oldvd.
           */
--- 4444,4454 ----
                          oldvd->vdev_devid = NULL;
                  }
          }
  
          /* mark the device being resilvered */
!         newvd->vdev_resilver_txg = txg;
  
          /*
           * If the parent is not a mirror, or if we're replacing, insert the new
           * mirror/replacing/spare vdev above oldvd.
           */
*** 5301,5317 ****
                  oldvd = spa_vdev_resilver_done_hunt(vd->vdev_child[c]);
                  if (oldvd != NULL)
                          return (oldvd);
          }
  
-         if (vd->vdev_resilvering && vdev_dtl_empty(vd, DTL_MISSING) &&
-             vdev_dtl_empty(vd, DTL_OUTAGE)) {
-                 ASSERT(vd->vdev_ops->vdev_op_leaf);
-                 vd->vdev_resilvering = B_FALSE;
-                 vdev_config_dirty(vd->vdev_top);
-         }
- 
          /*
           * Check for a completed replacement.  We always consider the first
           * vdev in the list to be the oldest vdev, and the last one to be
           * the newest (see spa_vdev_attach() for how that works).  In
           * the case where the newest vdev is faulted, we will not automatically
--- 5301,5310 ----
*** 5397,5406 ****
--- 5390,5401 ----
                  if (ppvd->vdev_ops == &vdev_spare_ops && pvd->vdev_id == 0 &&
                      ppvd->vdev_children == 2) {
                          ASSERT(pvd->vdev_ops == &vdev_replacing_ops);
                          sguid = ppvd->vdev_child[1]->vdev_guid;
                  }
+                 ASSERT(vd->vdev_resilver_txg == 0 || !vdev_dtl_required(vd));
+ 
                  spa_config_exit(spa, SCL_ALL, FTAG);
                  if (spa_vdev_detach(spa, guid, pguid, B_TRUE) != 0)
                          return;
                  if (sguid && spa_vdev_detach(spa, sguid, ppguid, B_TRUE) != 0)
                          return;