RFR: 8256390: ZGC: Relocate in-place instead of having a heap reserve [v2]

[Per Liden]

On Fri, 20 Nov 2020 12:11:41 GMT, Stefan Karlsson <stefank at openjdk.org> wrote:

>> Per Liden has updated the pull request incrementally with one additional commit since the last revision:
>> 
>>   Review Stefank
>
> src/hotspot/share/gc/z/zStat.hpp line 536:
> 
>> 534:   static size_t free(size_t used);
>> 535:   static size_t allocated(size_t used, size_t reclaiemd);
>> 536:   static size_t garbage(size_t reclaiemd);
> 
> reclaiemd -> reclaimed

Will fix!

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PR: https://git.openjdk.java.net/jdk/pull/1228