3525 Persistent L2ARC

*** 281,290 ****
--- 281,295 ----
                  if (vd->vdev_removing)
                          fnvlist_add_uint64(nv, ZPOOL_CONFIG_REMOVING,
                              vd->vdev_removing);
          }
  
+         if (flags & VDEV_CONFIG_L2CACHE)
+                 /* indicate that we support L2ARC persistency */
+                 VERIFY(nvlist_add_boolean_value(nv,
+                     ZPOOL_CONFIG_L2CACHE_PERSISTENT, B_TRUE) == 0);
+ 
          if (vd->vdev_dtl_sm != NULL) {
                  fnvlist_add_uint64(nv, ZPOOL_CONFIG_DTL,
                      space_map_object(vd->vdev_dtl_sm));
          }