RFR: 8282094: [REDO] Parallel: Refactor PSCardTable::scavenge_contents_parallel

[Ivan Walulya]

On Tue, 22 Feb 2022 11:59:56 GMT, Albert Mingkun Yang <ayang at openjdk.org> wrote:

> Mostly the same as [JDK-8280783](https://bugs.openjdk.java.net/browse/JDK-8280783), except one assertion is weakened.
> 
> 
> assert(*dirty_r == clean_card || dirty_r >= clear_limit_r);
> 
> 
> Test: tier1-6
> I also tried to reproduce the failures in https://bugs.openjdk.java.net/browse/JDK-8282062, but to no avail.

Lgtm!

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Marked as reviewed by iwalulya (Reviewer).

PR: https://git.openjdk.java.net/jdk/pull/7573