RFR: 8253180: ZGC: Implementation of JEP 376: ZGC: Concurrent Thread-Stack Processing

[Stefan Karlsson]

On Wed, 23 Sep 2020 12:50:51 GMT, Erik Österlund <eosterlund at openjdk.org> wrote:

>> src/hotspot/share/gc/z/zDriver.cpp line 108:
>> 
>>> 106:     return false;
>>> 107:   }
>>> 108:
>> 
>> Group needs_inactive_gc_locker, skip_thread_oop_barriers, and allow_coalesced_vm_operations together?
>> 
>> Add a comment about why we chose to skip coalescing here.
>
> Per explicitly wanted skip_thread_oop_barriers grouped with needs_inactive_gc_locker. But I should remove
> allow_coalesced_vm_operations; it is no longer used since I have removed VM operation coalescing completely already.

I agree with Per, but I also wanted to move allow_coalesced_vm_operations. But now your removing it, so it becomes a
moot point.

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PR: https://git.openjdk.java.net/jdk/pull/296