RFR: Bitmap slices commit/uncommit

[Roman Kennke]

Am 05.10.2017 um 20:27 schrieb Aleksey Shipilev:
> On 10/05/2017 02:20 PM, Aleksey Shipilev wrote:
>> http://cr.openjdk.java.net/~shade/shenandoah/bitmaps-uncommit/webrev.01/
> Roman had reported the test failure on smaller heap and -XX:ObjectAlignmentInBytes=16. The failure
> happens because mark bitmap gets denser, and this requires min region = 512K. On small heap, that is
> not satisfied automatically. This makes me thinking we need to elevate our min size by looking at
> mark bitmap:
>    http://cr.openjdk.java.net/~shade/shenandoah/bitmaps-uncommit/webrev.02/
>
> Testing: hotspot_gc_shenandoah + new test
>
> Thanks,
> -Aleksey
>
>
The test passes now and the changes look sane. Go from me!

Roman