From: Martin Kronbichler <martin.kronbichler@uni-a.de>
Date: Tue, 11 Apr 2023 08:01:45 +0000 (+0200)
Subject: Use proper MPI communicator
X-Git-Tag: v9.5.0-rc1~342^2~1
X-Git-Url: https://gitweb.dealii.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=588ab9ea3689da3124abe42acf49205ed365c3af;p=dealii.git

Use proper MPI communicator
---

diff --git a/include/deal.II/lac/solver_gmres.h b/include/deal.II/lac/solver_gmres.h
index 54d2393af1..e2f219d81b 100644
--- a/include/deal.II/lac/solver_gmres.h
+++ b/include/deal.II/lac/solver_gmres.h
@@ -915,7 +915,7 @@ namespace internal
                       block(vv, b).local_element(j);
         }
 
-      Utilities::MPI::sum(h, MPI_COMM_WORLD, h);
+      Utilities::MPI::sum(h, block(vv, 0).get_mpi_communicator(), h);
     }
 
 
@@ -1025,7 +1025,8 @@ namespace internal
             }
         }
 
-      return std::sqrt(Utilities::MPI::sum(norm_vv_temp, MPI_COMM_WORLD));
+      return std::sqrt(
+        Utilities::MPI::sum(norm_vv_temp, block(vv, 0).get_mpi_communicator()));
     }
 
 
@@ -1067,7 +1068,8 @@ namespace internal
             norm += temp * temp;
           }
 
-      return std::sqrt(Utilities::MPI::sum(norm, MPI_COMM_WORLD));
+      return std::sqrt(
+        Utilities::MPI::sum(norm, block(v, 0).get_mpi_communicator()));
     }