Withdrawn: 8276887: G1: Move precleaning to Concurrent Mark From Roots subphase

[duke]

On Wed, 10 Nov 2021 09:28:15 GMT, Albert Mingkun Yang <ayang at openjdk.org> wrote:

> Simple change of moving the "Preclean" subphase into "Mark from roots" subphase so that precleaning becomes parallel automatically. Evaluation using a contrived java program shows that multiple GC threads do precleaning. More detailed testing results are available in the JBS ticket.
> 
> Test: hotspot_gc

This pull request has been closed without being integrated.

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

PR: https://git.openjdk.java.net/jdk/pull/6327