Request for review: 7186737: Unable to allocate bit map for parallel garbage collection for the requested heap

[Tao Mao]

Hi all,
Can I have one or two quick reviews?

Thank you.
Tao

7186737: Unable to allocate bit map for parallel garbage collection for 
the requested heap
http://bugs.sun.com/view_bug.do?bug_id=7186737

webrev:
http://cr.openjdk.java.net/~tamao/7186737/webrev.00/

changeset:
Print out how many bytes we try to allocate when the allocation fails. 
This would give us a better idea of memory bottleneck.

test:
will run JPRT sanity for pushing.