RFR: 8279856: Parallel: Use PreservedMarks to record promotion-failed objects

[Thomas Schatzl]

On Mon, 17 Jan 2022 10:20:49 GMT, Stefan Johansson <sjohanss at openjdk.org> wrote:

> One think that would be interesting would be to do some measurements on the additional memory usage for the `PreservedMarks` stack with this change. To better understand what kind of memory trade-off we do for the quicker processing.

It might actually be nice to have some log message for that memory usage somewhere; while I know there is no "framework" for that in Parallel/Serial, it would still be nice to have.

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PR: https://git.openjdk.java.net/jdk/pull/7028