RFR (XXL): 8213108: Improve work distribution during remembered set scan

[Kim Barrett]

> On Jun 17, 2019, at 8:23 AM, Thomas Schatzl <thomas.schatzl at oracle.com> wrote:
> New webrev:
> http://cr.openjdk.java.net/~tschatzl/8213108/webrev.1_to_2/ (diff)
> http://cr.openjdk.java.net/~tschatzl/8213108/webrev.2/ (full)
> 
> Testing: hs-tier1-3
> 
> Thanks,
>  Thomas

Looks good.