RFR: 8271951: Consolidate preserved marks overflow stack in SerialGC

[Thomas Schatzl]

On Mon, 9 Aug 2021 10:31:54 GMT, Roman Kennke <rkennke at openjdk.org> wrote:

> > Pre-existing, and just a side note and not directly aimed at you: when looking at the change, there is the `PreservedMark` class in Serial GC, and `PreservedMarks` with its `OopAndMarkWord` inner class and `PreservedMarksSet` in `shared/preservedMarks.hpp` which is not perfect naming. I'll probably file an RFE to look into this.
> 
> We might even think about using PreservedMarksSet in Serial GC, if we can allocate it in free parts of the heap. Not sure how feasible that would be though...

Agree. Filed JDK-8272147.

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PR: https://git.openjdk.java.net/jdk/pull/5022