RFR: 8238979: Improve G1DirtyCardQueueSet handling of previously paused buffers

[Kim Barrett]

> On Feb 24, 2020, at 5:02 PM, sangheon.kim at oracle.com wrote:
> On 2/13/20 5:46 PM, Kim Barrett wrote:
>> […]
>> 
>> CR:
>> https://bugs.openjdk.java.net/browse/JDK-8238979
>> 
>> Webrev:
>> https://cr.openjdk.java.net/~kbarrett/8238979/open.00/
>> 
>> Testing:
>> mach5 tier1-5 in conjunction with other in-development changes.
>> Local (linux-x64) hotspot:tier1 for this change in isolation.
> Looks good to me.
> 
> Thanks,
> Sangheon

Thanks.