--- a/hotspot/src/share/vm/gc/shared/workgroup.hpp	Tue Sep 06 22:52:35 2016 +0200
+++ b/hotspot/src/share/vm/gc/shared/workgroup.hpp	Wed Sep 07 09:20:10 2016 +0200
@@ -162,7 +162,7 @@
     _active_workers = MIN2(v, _total_workers);
     add_workers(false /* exit_on_failure */);
     assert(v != 0, "Trying to set active workers to 0");
-    log_info(gc, task)("GC Workers: using %d out of %d", _active_workers, _total_workers);
+    log_trace(gc, task)("%s: using %d out of %d workers", name(), _active_workers, _total_workers);
     return _active_workers;
   }