message: auto send_buf = ext_buf.Write() + send_offset
diff: @@ -3189,17 +3189,10 @@ void DeviceConformingProlongationOperator::MultTranspose(const Vector &x,
  {
  const int send_offset = ext_buf_offsets[nbr];
  const int send_size = ext_buf_offsets[nbr+1] - send_offset;
  - //const int sizeof_double = static_cast<int>(sizeof(double));
  if (send_size > 0)
  {
  - void *send_buf;
  if (!gpu_aware_mpi) { ext_buf.HostReadWrite(); }
  - ext_buf.HostReadWrite();
  - //Memory<double> alias(ext_buf, send_offset, send_size);
  - //send_buf = alias;
  - send_buf = ext_buf + send_offset;
  - //auto send_bfr_gpu = mfem::Write(alias,send_size);
  - //send_buf = ext_buf.GetMemory().GetPtr() + send_offset;
  + auto send_buf = ext_buf.Write() + send_offset;
  MPI_Isend(send_buf, send_size, MPI_DOUBLE, gtopo.GetNeighborRank(nbr),
  41823, gtopo.GetComm(), &requests[req_counter++]);
  }
  