--- old/src/share/vm/gc_implementation/g1/g1CollectedHeap.hpp	2013-06-19 12:28:45.124391728 -0700
+++ new/src/share/vm/gc_implementation/g1/g1CollectedHeap.hpp	2013-06-19 12:28:44.896250383 -0700
@@ -1639,11 +1639,13 @@
   virtual void unregister_nmethod(nmethod* nm);
 
   // Migrate the nmethods in the code root lists of the regions
-  // in the collection set to regions in to-space
+  // in the collection set to regions in to-space. In the event
+  // of an evacuation failure, nmethods that reference objects
+  // that were not successfullly evacuated are not migrated.
   void migrate_strong_code_roots();
 
-  // During an initial mark pause, mark the strong code roots that
-  // point into the heap.
+  // During an initial mark pause, mark all the code roots that
+  // point into regions *not* in the collection set.
   void mark_strong_code_roots(uint worker_id);
 
   // Rebuild the stong code root lists for each region