RFR (S) 8245464: Shenandoah: allocate collection set bitmap at lower addresses

[Roman Kennke]

Looks good to me.

Thanks,
Roman

On Thu, 2020-05-21 at 12:10 +0200, Aleksey Shipilev wrote:
> RFE:
>   https://bugs.openjdk.java.net/browse/JDK-8245464
> 
> See the rationale in the bug itself.
> 
> Webrev:
>   https://cr.openjdk.java.net/~shade/8245464/webrev.02/
> 
> Testing: hotspot_gc_shenandoah, tier{1,2} with Shenandoah
>