From 9cfce215d6a4a3e4ea389704a73e2664d6c9fb0a Mon Sep 17 00:00:00 2001
From: Daniel Arndt <daniel.arndt@iwr.uni-heidelberg.de>
Date: Wed, 20 Dec 2017 23:15:10 +0100
Subject: [PATCH] Add comment why to call update_number_cache

---
 source/distributed/tria.cc | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/source/distributed/tria.cc b/source/distributed/tria.cc
index d9fc1b5e1b..532ef24262 100644
--- a/source/distributed/tria.cc
+++ b/source/distributed/tria.cc
@@ -3522,6 +3522,8 @@ namespace parallel
 
       //finally call the base class for storing the periodicity information
       dealii::Triangulation<dim, spacedim>::add_periodicity(periodicity_vector);
+
+      // The range of ghost_owners might have changed so update that information
       this->update_number_cache();
 #else
       Assert(false, ExcMessage ("Need p4est version >= 0.3.4.1!"));
-- 
2.39.5