changes to docs, additional comments, and ParserWrapper file from PR suggestion

1 files changed, 2 insertions, 0 deletions

diff --git a/Source/Initialization/WarpXInitData.cpp b/Source/Initialization/WarpXInitData.cpp
index f4c2afd57..be29a1cbc 100644
--- a/Source/Initialization/WarpXInitData.cpp
+++ b/Source/Initialization/WarpXInitData.cpp
@@ -534,6 +534,8 @@ WarpX::InitializeExternalFieldsOnGridUsingParser (
                 // Initialize the z-component of the field.
                 mfzfab(i,j,k) = zfield_parser->getField(x,y,z);
             },
+            /* To allocate shared memory for the GPU threads. */
+            /* But, for now only 3 doubles (x,y,z) are allocated. */
             amrex::Gpu::numThreadsPerBlockParallelFor() * sizeof(double) * 3
         );