8165857: CMS _overflow_list is missing volatile specifiers.
Summary: Change _overflow_list from "oop" to "oopDesc* volatile", both CMS and ParNew.
Reviewed-by: kbarrett, tschatzl

8146989: Introduce per-worker preserved mark stacks in ParNew
Summary: Unify and provide per-worker preserved mark stack handling in ParNew
Reviewed-by: tschatzl, ysr

8146690: Make all classes in GC follow the naming convention.
Reviewed-by: dholmes, stefank

8134626: Misc cleanups after generation array removal
Reviewed-by: david, dholmes, tschatzl

8133470: Uses of Atomic methods in plab.hpp should be moved to .inline.hpp file
Summary: Fix include file dependencies according to general guidelines for plab.hpp
Reviewed-by: ehelin, mgerdin

8079555: REDO - Determining the desired PLAB size adjusts to the the number of threads at the wrong place
Summary: Calculate the desired PLAB value for a single thread and then return desired PLAB size according to the current number of threads when needed
Reviewed-by: jmasa, tschatzl

8077842: Remove the level parameter passed around in GenCollectedHeap
Reviewed-by: kbarrett, mgerdin

8080879: Remove FlexibleWorkGang::set_for_termination
Reviewed-by: brutisso, kbarrett, pliden

8080110: Remove usage of CollectedHeap::n_par_threads() from root processing
Reviewed-by: jmasa, kbarrett

8079792: GC directory structure cleanup
Reviewed-by: brutisso, stefank, david