RFR(XS): Align up matrix size to page boundary

[Roman Kennke]

Am 22.05.2017 um 22:47 schrieb Zhengyu Gu:
> Run fastdebug: java -XX:+UseShenandoahGC
> -XX:ShenandoahGCHeuristics=partial -version
>
> failed with:
>
> #  Internal Error
> (/home/zgu/workspace/shenandoah-head/jdk9/hotspot/src/share/vm/memory/virtualspace.cpp:102),
> pid=25744, tid=25745
> #  assert((size & (granularity - 1)) == 0) failed: size not aligned to
> os::vm_allocation_granularity()
> #
>
>
> Webrev: http://cr.openjdk.java.net/~zgu/shenandoah/matrix_size/webrev.00/
>
> Test:
>   fastdebug and release: hotspot_gc_shenandoah

Looks good to me!
Roman