6935821: G1: threads created during marking do not active their SATB queues Summary: Newly-created threads always had the active field of their SATB queue initialized to false, even if they were created during marking. As a result, updates from threads created during a marking cycle were never enqueued and never processed. The fix includes remaining a method from active() to is_active() for readability and naming consistency. Reviewed-by: ysr, johnc

Merge

6935839: excessive marking stack growth during full gcs Summary: process one item at a time from the objarray stack/queue Reviewed-by: apetrusenko, tonyp