[sh/jdk8u] Backport region count/region size fixes

[Aleksey Shipilev]

On 5/27/21 4:10 PM, Zhengyu Gu wrote:
> I would like to backport following two CRs that fix region count/region
> size calculations.
> 
> 8265239: Shenandoah: Shenandoah heap region count could be off by 1
> 8266802: Shenandoah: Round up region size to page size unconditionally
> 
> Both patch do not apply cleanly.

OK, please show the webrevs then?

-- 
Thanks,
-Aleksey