[11] 2020-06-04: Bulk backports to sh/jdk11

[Zhengyu Gu]

Okay.

Thanks,

-Zhengyu

On 6/4/20 5:32 AM, Aleksey Shipilev wrote:
> https://cr.openjdk.java.net/~shade/shenandoah/backports/jdk11-20200604/webrev.01/
> 
> This backports a few safe-ish performance improvements.
> 
> Changes:
>   [backport] 8246100: Shenandoah: walk roots in more efficient order
>   [backport] 8246097: Shenandoah: limit parallelism in CLDG root handling
> 
> Testing: hotspot_gc_shenandoah {fastdebug,release}, tier{1,2} with Shenandoah
>