RFR: 8279856: Parallel: Use PreservedMarks to record promotion-failed objects [v2]

[Thomas Schatzl]

On Tue, 25 Jan 2022 15:40:04 GMT, Albert Mingkun Yang <ayang at openjdk.org> wrote:

>> Simple change of using `PreservedMarks` to skip young-gen walking in finding promotion-failed objs.
>> 
>> Test: tier1-6
>
> Albert Mingkun Yang has updated the pull request incrementally with two additional commits since the last revision:
> 
>  - review
>  - review

Lgtm.

-------------

Marked as reviewed by tschatzl (Reviewer).

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