add documentation

diff --git a/include/deal.II/lac/la_parallel_vector.h b/include/deal.II/lac/la_parallel_vector.h
index 29ee2ff50af6b705d34b19221d02eda5e89f77e5..f0efe7ab6d750b7c5514d8d82e3b21284cb1ec4b 100644 (file)
--- a/include/deal.II/lac/la_parallel_vector.h
+++ b/include/deal.II/lac/la_parallel_vector.h
@@ -251,6 +251,9 @@ namespace LinearAlgebra
 
       /**
        * Copy constructor. Uses the parallel partitioning of @p in_vector.
+       * It should be noted that this constructor automatically sets ghost
+       * values to zero. Call @p update_ghost_values() directly following
+       * construction if a ghosted vector is required.
        */
       Vector(const Vector<Number, MemorySpace> &in_vector);