RFR: 8303252: G1: Return early from Full-GC if no regions are selected for compaction. [v4]

[Thomas Schatzl]

On Wed, 1 Mar 2023 09:37:37 GMT, Ivan Walulya <iwalulya at openjdk.org> wrote:

>> Wouldn't `log_info(gc, phases) ("No Regions selected for compaction.` above (on the info level) already cover this?
>
> It is fine for me either way, can keep both or leave just the log_info.

The `log_info` one is sufficient.

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PR: https://git.openjdk.org/jdk/pull/12768