RFR: Initial committed regions count can be more than max

[Robert Stupp]

Thanks! I can confirm that the hot-fix works.

On 11/4/18 1:23 AM, Roman Kennke wrote:
> Ok. (and wtf?)
>
> Thanks,
> Roman
>
>> http://cr.openjdk.java.net/~shade/shenandoah/committed-max/webrev.01/
>>
>> This hot-fixes the apparent off-by-one error in initial region count calculation. We normally deal
>> with rounding errors by dealing with capacities in "region" units. That works well, but we also need
>> to make sure the initial number of regions does not get more than max number of regions.
>>
>> Separately, I shall look into the underlying issues why we have less "max" regions than "initial".
>> The hotfix makes the downstream code correct meanwhile, and it makes sure failures are not cryptic,
>> but actually asserted before pushing bad values down.
>>
>> Testing: tier3_gc_shenandoah, failing ad-hoc tests
>>
>> Thanks,
>> -Aleksey
>>
-- 
Robert Stupp
@snazy