RFR: 8268556: Use bitmap for storing regions that failed evacuation

[Stefan Johansson]

On Fri, 11 Jun 2021 07:54:21 GMT, Thomas Schatzl <tschatzl at openjdk.org> wrote:

> Hi all,
> 
>   can I have reviews for this follow-up cleanup of the earlier JDK-8267073? It introduced a byte-map for storing information about regions that have already been experienced an evacuation failure.
> 
> During review the improvement to use a bitmap instead came up - uses less space and there are existing setters/getters that can be used.
> 
> Testing: tier1-4

Marked as reviewed by sjohanss (Reviewer).

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PR: https://git.openjdk.java.net/jdk/pull/4471