RFR: 8221786: ZGC: Increase max heap size to 16TB

[Per Liden]

Thanks!

/Per


On 04/17/2019 11:56 AM, Stefan Karlsson wrote:
> Looks good.
> 
> StefanK
> 
> On 2019-04-09 13:34, Per Liden wrote:
>> Updated webrev after StefanK spotted errors in the ASCII diagrams.
>>
>> http://cr.openjdk.java.net/~pliden/8221786/webrev.1
>>
>> /Per
>>
>> On 4/1/19 10:14 PM, Per Liden wrote:
>>> Increase max heap size to 16TB. We could just bump 
>>> ZPlatformAddressOffsetBits to 44, but we should take the opportunity 
>>> to make this slightly more dynamic and set ZPlatformAddressOffsetBits 
>>> at runtime. As a start, I propose that we limit the dynamic behavior 
>>> to an address space reservation of 4TB, 8TB or 16TB (per heap view), 
>>> depending on what -Xmx is set to. In the future we could have a more 
>>> elaborate scheme if we find a need for that.
>>>
>>> Bug: https://bugs.openjdk.java.net/browse/JDK-8221786
>>> Webrev: http://cr.openjdk.java.net/~pliden/8221786/webrev.0
>>>
>>> /Per
>