RFR: Disable matrix for good when -UseShenandoahMatrix

[Roman Kennke]

Am 24.03.2017 um 18:46 schrieb Aleksey Shipilev:
> On 03/24/2017 06:39 PM, Roman Kennke wrote:
>> Can we avoid clearing the bitmap if we don't need it and the
>> clear_all()/internal_clear_all() distinction?
> Yes we can, like this?
>
>   39   if (UseShenandoahMatrix) {
>   40     clear_all();
>   41   }
>
>  http://cr.openjdk.java.net/~shade/shenandoah/matrix-disable-for-good/webrev.02/
>
> Thanks,
> -Aleksey
>
Perfect!

Roman