Improvements from review.

CMakeLists_files.cmake

@@ -417,6 +417,7 @@ list (APPEND PUBLIC_HEADER_FILES
   ebos/hdf5serializer.hh
   ebos/vtkecltracermodule.hh
   opm/simulators/flow/countGlobalCells.hpp
+  opm/simulators/flow/priVarsPacking.hpp
   opm/simulators/flow/BlackoilModelEbos.hpp
   opm/simulators/flow/BlackoilModelEbosNldd.hpp
   opm/simulators/flow/BlackoilModelParametersEbos.hpp

opm/simulators/flow/BlackoilModelEbosNldd.hpp

@@ -266,7 +266,7 @@ public:
         // we move on.
         const auto& comm = model_.ebosSimulator().vanguard().grid().comm();
         if (comm.size() > 1) {
-            const auto& ccomm = model_.ebosSimulator().model().newtonMethod().linearSolver().comm();
+            const auto* ccomm = model_.ebosSimulator().model().newtonMethod().linearSolver().comm();
 
             // Copy numerical values from primary vars.
             ccomm->copyOwnerToAll(solution, solution);

opm/simulators/linalg/ISTLSolverEbos.hpp

@@ -263,11 +263,9 @@ std::unique_ptr<Matrix> blockJacobiAdjacency(const Grid& grid,
             OPM_TIMEBLOCK(istlSolverEbosPrepare);
             const bool firstcall = (matrix_ == nullptr);
 #if HAVE_MPI
-            if (firstcall) {
+            if (firstcall && isParallel()) {
                 const std::size_t size = M.N();
-                if (isParallel()) {
-                    detail::copyParValues(parallelInformation_, size, *comm_);
-                }
+                detail::copyParValues(parallelInformation_, size, *comm_);
             }
 #endif