--- old/src/share/vm/memory/generation.hpp	2011-12-06 16:57:22.326167215 -0800
+++ new/src/share/vm/memory/generation.hpp	2011-12-06 16:57:22.102558675 -0800
@@ -416,7 +416,7 @@
     // XXX See note in genCollectedHeap::millis_since_last_gc()
     NOT_PRODUCT(
       if (now < _time_of_last_gc) {
-        warning("time warp: %d to %d", _time_of_last_gc, now);
+        warning("time warp: "INT64_FORMAT" to "INT64_FORMAT, _time_of_last_gc, now);
       }
     )
     return _time_of_last_gc;