RFR: 8209375: ZGC: Use dynamic base address for mark stack space

[Per Liden]

Thanks Kim!

/Per


On 08/14/2018 12:40 AM, Kim Barrett wrote:
>> On Aug 13, 2018, at 3:53 AM, Per Liden <per.liden at oracle.com> wrote:
>>
>> We're currently using a fixed address space range for the mark stack space, both in terms of it's base address and it's size. This isn't really needed, we could just as well let os::reserve_memory() pick and address range for us and only reserve ZMarkStackSpaceLimit bytes, instead of 1TB.
>>
>> Bug: https://bugs.openjdk.java.net/browse/JDK-8209375
>> Webrev: http://cr.openjdk.java.net/~pliden/8209375/webrev.0
>>
>> /Per
> 
> Looks good.
>