--- a/hotspot/src/share/vm/gc_implementation/concurrentMarkSweep/concurrentMarkSweepThread.hpp	Sat Oct 16 17:12:19 2010 -0400
+++ b/hotspot/src/share/vm/gc_implementation/concurrentMarkSweep/concurrentMarkSweepThread.hpp	Thu Oct 21 17:29:24 2010 -0700
@@ -120,8 +120,10 @@
   }
 
   // Wait on CMS lock until the next synchronous GC
-  // or given timeout, whichever is earlier.
-  void    wait_on_cms_lock(long t); // milliseconds
+  // or given timeout, whichever is earlier. A timeout value
+  // of 0 indicates that there is no upper bound on the wait time.
+  // A concurrent full gc request terminates the wait.
+  void wait_on_cms_lock(long t_millis);
 
   // The CMS thread will yield during the work portion of its cycle
   // only when requested to.  Both synchronous and asychronous requests