8150393: Maintain the set of survivor regions in an array between GCs Reviewed-by: tschatzl, sjohanss

8155811: Remove HeapRegionRemSet::_coarse_dirty flag Reviewed-by: mgerdin, jmasa

8155813: Fix indentation in G1RemSetScanState::clear_card_table() Reviewed-by: mgerdin

Merge

8154794: Add support for experimental fields/events to event-based tracing Reviewed-by: mlarsson, mgronlun

8155229: Tune thread usage for live data clearing Reviewed-by: mgerdin, drwhite

8155233: Lazy coarse map clear Summary: Only clear the coarse bitmaps of the remembered sets if they were dirtied. Reviewed-by: jmasa, mgerdin

8155230: Tune thread usage for mark bitmap clear Reviewed-by: jmasa, mgerdin

8153507: Improve Card Table Clear Task Summary: Move card table clear code into remembered set related files. Improve work distribution of this task, and tune thread usage. Reviewed-by: jmasa, mgerdin

8155232: Augment Workgang to run task with a given number of threads Summary: Add a method to run a WorkGang with a set number of threads. Reviewed-by: stefank, jmasa, mgerdin

8154258: [TESTBUG] Various serviceability tests fail compilation Summary: Replace sun.misc.Unsafe with jdk.internal.misc.Unsafe Reviewed-by: chegar, kvn

8154110: Update class* and safepoint* logging subsystems Summary: Refactored logging tags in class and safepoint subsystems. Reviewed-by: coleenp, rehn, hseigel

Merge

8154743: Internal Error: psParallelCompact.hpp assert(addr >= _region_start) failed: bad addr Reviewed-by: tschatzl, kbarrett