[11u] RFR 8250827: Shenandoah: needs to reset/finish StringTable's dead count before/after parallel walk

[Roman Kennke]

Are you sure, this is 11u-specific? I know that we have concurrent
stringtable processing in later JDKs, but some code paths still use the
parallelCleaning code, or is it not relevant there?

Roman

On Thu, 2020-07-30 at 10:05 -0400, Zhengyu Gu wrote:
> Please review this small patch that triggers StringTable cleaning
> and 
> resizing after parallel walk.
> 
> Bug: https://bugs.openjdk.java.net/browse/JDK-8250827
> Webrev: http://cr.openjdk.java.net/~zgu/JDK-8250827/webrev.00/
> 
> 
> Test:
>    hotspot_gc_shenandoah
> 
> Thanks,
> 
> -Zhengyu
>