Two patches that are necessary for the upgrade to petsc 2.2.1

git-svn-id: https://svn.dealii.org/branches/Branch-5-0@9698 0785d39b-7218-0410-832d-ea1e28bc413d

diff --git a/deal.II/lac/source/petsc_matrix_base.cc b/deal.II/lac/source/petsc_matrix_base.cc
index de15e68d7c81eb66193bf002d82cf516af77cfb9..d297e8052746ff2575066b20b81472afb21943d0 100644 (file)
--- a/deal.II/lac/source/petsc_matrix_base.cc
+++ b/deal.II/lac/source/petsc_matrix_base.cc
@@ -102,6 +102,12 @@ namespace PETScWrappers
   MatrixBase::operator = (const double d)
   {
     Assert (d==0, ExcScalarAssignmentOnlyForZeroValue());    
+
+                                     // flush previously cached elements. this
+                                     // seems to be necessary since petsc
+                                     // 2.2.1, at least for parallel vectors
+                                     // (see test bits/petsc_64)
+    compress ();
     
     const int ierr = MatZeroEntries (matrix);
     AssertThrow (ierr == 0, ExcPETScError(ierr));

diff --git a/deal.II/lac/source/petsc_vector_base.cc b/deal.II/lac/source/petsc_vector_base.cc
index 1ddfb78601d178649b7f0254fd47c5499977b700..bf2c92031a7451df93e9cd8cd2dfd5b133fd7a5a 100644 (file)
--- a/deal.II/lac/source/petsc_vector_base.cc
+++ b/deal.II/lac/source/petsc_vector_base.cc
@@ -121,6 +121,12 @@ namespace PETScWrappers
   VectorBase &
   VectorBase::operator = (const PetscScalar s)
   {
+                                     // flush previously cached elements. this
+                                     // seems to be necessary since petsc
+                                     // 2.2.1, at least for parallel vectors
+                                     // (see test bits/petsc_65)
+    compress ();
+    
     const int ierr = VecSet (&s, vector);
     AssertThrow (ierr == 0, ExcPETScError(ierr));