[8u60] RFR backport of 8069273: Decrease Hot Card Cache Lock contention

[Thomas Schatzl]

Hi all,

  can I have reviews for the backport of "8069273: Decrease Hot Card
Cache Lock contention" for 8u60?

It did only apply with minor changes, so I need re-reviews. The problems
are:
- some previous, non-ported changed the copyright date
- 8u60 does not have size_t versions of the Atomic instructions, fixed
by casting to intptr_t (as done elsewhere in this case)
- removing the HotCardCache_lock needed to be done manually, as
somewhere the declaration order of locks changed in mutexLocker.cpp.

Note that this change is based on "JDK-8053998: Hot card cache flush
chunk size too coarse grained", which is also out for review.

Full 8u60 changeset:
http://cr.openjdk.java.net/~tschatzl/8069273-8u60/webrev.8u60/
Diff changest:
http://cr.openjdk.java.net/~tschatzl/8069273-8u60/webrev.8u60-fix/

CR:
https://bugs.openjdk.java.net/browse/JDK-8069273

Original change:
http://hg.openjdk.java.net/jdk9/jdk9/hotspot/rev/1c8ba2d0d2f0

Testing: jprt

Thanks,
  Thomas