RFR: 8252513: ZGC: Contiguous memory reservation probing is broken for TB heap sizes

[Stefan Karlsson]

Thanks, Erik.

StefanK

On 2020-09-01 10:09, Erik Österlund wrote:
> Hi Stefan,
>
> Looks good.
>
> Thanks,
> /Erik
>
> On 2020-08-31 13:13, Stefan Karlsson wrote:
>> Hi all,
>>
>> Please review this patch to fix memory reservation probing for large 
>> heap size.
>>
>> https://cr.openjdk.java.net/~stefank/8252513/webrev.01/
>> https://bugs.openjdk.java.net/browse/JDK-8252513
>>
>> If the passed in 'size' is equal to ZAddressOffsetMax, both 'end' and 
>> 'increment' becomes 0, and the code will loop forever.
>>
>> I've changed the code to at least increment with ZGranuleSize. I've 
>> also replaced the usage of 'start <= end', with 'start + size <= 
>> ZAddressOfsetMax', since it  makes the code easier to reason about, 
>> IMHO.
>>
>> Thanks,
>> StefanK
>