RFR (XS): 8u40 Backport of 8038423: G1: Decommit memory within the heap

[Thomas Schatzl]

Hi all,

  can I have reviews for backport merge conflicts for 8038423?

Again, it's two minor issues:

 - typo in g1CardCounts.cpp (expects "... will be an OOB access...", but
is "... will be an OOB accesss...").

 - missing change in heapRegionRemSet.cpp, the format string for the
initializer of the OtherRegionTable mutex is expected to read
"HeapRegionRemSet lock #%u", but is "HeapRegionRemSet lock
#"UINT32_FORMAT".
[The missing change seems to be 8039244, which cannot be easily
backported.]

Webrev:
http://cr.openjdk.java.net/~tschatzl/8038423/webrev.8u40/

Original webrev:
http://cr.openjdk.java.net/~tschatzl/8038423/webrev.1/

Thanks,
  Thomas