RFR: 8240668 : G1 list of all PerRegionTable does not have to be a double linkedlist any more

[Kim Barrett]

> On Mar 6, 2020, at 7:35 AM, Ivan Walulya <ivan.walulya at oracle.com> wrote:
> 
> Hi all,
> 
> Please review this modification to change the list of all PerRegionTables from a double linkedlist to a linkedlist.
> 
> JBS: https://bugs.openjdk.java.net/browse/JDK-8240668
> webrev: http://cr.openjdk.java.net/~iwalulya/8240668/00/
> 
> Testing: Tier 1 - 3
> 
> //Ivan

Looks good.