8057003: Large reference arrays cause extremely long synchronization times
Summary: Slice large object arrays into parts so that the synchronization of marking threads with an STW pause request does not take long.
Reviewed-by: ehelin, pliden

8166207: Use of Copy::conjoint_oops_atomic in global mark stack causes crashes on arm64
Summary: Use Copy::conjoint_memory_atomic() instead.
Reviewed-by: kbarrett

8159422: Very high Concurrent Mark mark stack contention
Summary: Decrease contention on mark stack by splitting locks, and minimizing the amount of time these locks are held. Improve mark stack management.
Reviewed-by: kbarrett, mgerdin, eosterlund

8164948: Initializing stores of HeapRegions are not ordered with regards to their use in G1ConcurrentMark
Summary: Add a storestore barrier before publishing newly initialized HeapRegion instances, and place a loadload barrier before use of members.
Reviewed-by: sjohanss, sangheki

8165292: The gc+task logging is repeated a lot, decreasing the usefulness of -Xlog:gc*=info
Summary: Separate number of workers used debugging information from adaptive worker sizing log messages.
Reviewed-by: ehelin, sjohanss, jmasa

8157907: Incorrect inclusion of atomic.hpp instead of atomic.inline.hpp
Summary: Remove atomic.inline.hpp and move the contents back into atomic.hpp
Reviewed-by: stefank, pliden, simonis

8159073: : Error handling incomplete when creating GC threads lazily
Reviewed-by: drwhite, tschatzl, sangheki

8161993: G1 crashes if active_processor_count changes during startup
Summary: Use the initial active processor count for memory initialization instead of the current active one.
Reviewed-by: dholmes, mgerdin

8034842: Parallelize the Free CSet phase in G1
Reviewed-by: jmasa, ehelin

8160897: Concurrent mark mark stack memory allocation leaks memory
Summary: Fix and clean up concurrent mark mark stack memory allocation.
Reviewed-by: jmasa, sangheki

8153582: Logging of ConcGCThreads is done too early
Summary: ConcGCThreads is logged as 0 because it hasn't been initialized yet.
Reviewed-by: tschatzl, dfazunen

8155810: Bound the number of root region scan threads to the number of survivor regions
Reviewed-by: jmasa, sjohanss

8156660: JDK-8150393 does not set _scan_in_progress properly
Reviewed-by: ehelin, mgerdin

Merge

8150721: Don't explicitly manage G1 young regions in YoungList
Reviewed-by: ehelin, sjohanss, tschatzl

8141501: Problems with BitMap buffer management
Reviewed-by: pliden, kbarrett

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

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

8153170: Card Live Data does not correctly handle eager reclaim
Summary: The card live data of regions eagerly reclaimed during remark and cleanup pause could be wrong, not considering that these regions were eagerly reclaimed and empty.
Reviewed-by: drwhite, kbarrett

8154154: Separate G1 specific policy code from the CollectorPolicy class hierarchy
Summary: Move G1 runtime policy code to new class G1Policy which is unrelated to CollectorPolicy
Reviewed-by: kbarrett, ehelin

8152905: hs_err file is missing gc threads
Summary: List the GC threads in the hs_err file in the "Other Threads" section
Reviewed-by: dcubed, coleenp

8151386: Extract card live data out of G1ConcurrentMark
Summary: Move card live data management out of G1ConcurrentMark into extra class G1CardLiveData managed by G1RemSet
Reviewed-by: mgerdin, kbarrett

8077144: Concurrent mark initialization takes too long
Summary: Remove per-marking thread liveness bitmaps and recreate liveness bitmap concurrently after the cleanup pause.
Reviewed-by: mgerdin, ehelin, kbarrett

8152632: Rename LogHandle(...) to Log(...)
Reviewed-by: brutisso, mlarsson, rprotacio

8153302: [BACKOUT] STW phases at Concurrent GC should count in PerfCounter
Reviewed-by: jmasa, jwilhelm

8151674: STW phases at Concurrent GC should count in PerfCounter
Reviewed-by: jmasa, sla, tschatzl

8152100: Rework and unify the GC phase logging
Reviewed-by: sjohanss, jwilhelm

8151085: Change G1 concurrent timer and tracer measuring time
Summary: Change measuring time for G1 concurrent phases and reporting heap summary
Reviewed-by: brutisso, sjohanss

8151920: Region liveness printing is broken
Summary: Remove obsolete code that causes an assert.
Reviewed-by: drwhite, brutisso

8151614: Improve logging in concurrent mark code
Summary: Move detailed concurrent mark phase logging to "gc, marking" tags and add a summary "Concurrent Cycle" log message when only using "gc" logging.
Reviewed-by: sangheki, brutisso

8151126: Clean up duplicate code for clearing the mark bitmaps
Summary: Merge the code to clear the mark bitmap concurrently and in the STW pause.
Reviewed-by: jmasa, tbenson

8151605: Change warning() to log_warning(gc) in the GC code
Reviewed-by: jwilhelm, jmasa

8149834: gc/shared/gcTimer.cpp:88 assert(_is_concurrent_phase_active) failed: A concurrent phase is not active
Summary: Compare-and-exchange for concurrent gc timer related flag at G1CollectedHeap
Reviewed-by: jmasa, drwhite

8058944: Unify the reporting strings for the GC debug level logging in G1
Reviewed-by: sjohanss, tschatzl

8150421: Delete experimental G1UseConcMarkReferenceProcessing
Summary: Removed the option and supporting code.
Reviewed-by: jmasa, tamao

8139651: ConcurrentG1Refine uses ints for many of its members that should be unsigned types
Summary: ints need to be changed to size_t
Reviewed-by: kbarrett, tbenson

8149013: Remove unused and dead code from G1CollectorPolicy
Reviewed-by: ehelin, jwilhelm

8148992: VM can hang on exit if root region scanning is initiated but not executed
Reviewed-by: tschatzl, pliden, jwilhelm

8148973: Rename g1/concurrentMark.{hpp,cpp,inline.hpp} to g1/g1ConcurrentMark.{hpp,cpp,inline.hpp}
Reviewed-by: tschatzl, mgerdin