RFR (S): Replace VirtualSpace-based pretouch with region-based one

[Roman Kennke]

Looks good to me.

Roman


Am Mittwoch, den 11.01.2017, 19:40 +0100 schrieb Aleksey Shipilev:
> Hi,
> 
> This leverages our existing region infrastructure, and thus makes the
> whole
> thing less susceptible for errors:
>   http://cr.openjdk.java.net/~shade/shenandoah/always-pretouch-per-re
> gion/webrev.01/
> 
> Testing: hotspot_gc_shenandoah, custom runs with release/fastdebug
> 
> Thanks,
> -Aleksey
>