RFR: 8302215: G1: Last-ditch Full GC should do serial compaction for tail regions in per thread compaction points. [v2]

[Ivan Walulya]

On Wed, 15 Feb 2023 16:09:14 GMT, Albert Mingkun Yang <ayang at openjdk.org> wrote:

> I think what I suggested requires less code than the sorting approach.

Unfortunately, that approach is only valid if I add the bitmap as suggest by @kstefanj, otherwise you may iterate over all regions yet the serial compaction has just a few regions as for the test-case I highlighted above.

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PR: https://git.openjdk.org/jdk/pull/12529