6724367: par compact could clear less young gen summary data Reviewed-by: jmasa, apetrusenko

6483129: par compact assertion failure (new_top > bottom) Summary: avoid computing the dense prefix if a space is empty Reviewed-by: pbk, tonyp

6718283: existing uses of *_FORMAT_W() were broken by 6521491 Reviewed-by: ysr, pbk

6672698: mangle_unused_area() should not remangle the entire heap at each collection. Summary: Maintain a high water mark for the allocations in a space and mangle only up to that high water mark. Reviewed-by: ysr, apetrusenko

Merge

6731726: jmap -permstat reports only 50-60% of permgen memory usage. Reviewed-by: swamyv, martin Contributed-by: yamauchi@google.com