request for review (M): 4965777 GC changes to support use of discovered field for pending references

[Alan Bateman]

Mandy Chung wrote:
> :
>
> It'd be good to write a regression test for this bug to be included
> in the jdk fix.  I can help writing it if you want.
I looked at the changes in the jdk repository and they look good to me too.

Adding the bit to the jdk_version_info structure is a neat way to deal 
with the mis-match until hotspot and the JDK meet up in a promoted 
build. Do you think this bit will be temporary or do you plan to remove 
it once the changes have got into all releases?

On the test, I agree with Mandy that it would be good to have a test in 
the jdk repository. I assume this will need to wait until HotSpot is in 
a promoted build so it would need to be a follow-on changeset anyway.

-Alan