8153360: G1HRRSFlushLogBuffersOnVerify with remembered set verification does not work
Reviewed-by: sjohanss, tschatzl

8150900: Implement diagnostic_pd
Reviewed-by: twisti, gziemski, kevinw

8073500: Prevent certain commercial flags from being changed at runtime
Summary: Implement new writeable mechanism for flag control
Reviewed-by: coleenp, iklam

8155634: Clean out old logging and dead code from SurvRateGroup
Reviewed-by: jmasa, tschatzl, sjohanss

8133051: Concurrent refinement threads may be activated and deactivated at random
Summary: Establish min threshold step; earlier primary refinement thread activation.
Reviewed-by: tschatzl, drwhite, mgerdin, jmasa

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

8151304: Remove unused develop options(ClearInterpreterLocals and others)
Reviewed-by: coleenp, jwilhelm

8150984: Invalid VM argument causes crash -XX:G1ConcRefinementServiceIntervalMillis=2147483648
Summary: Change maximum range so it can't be negative
Reviewed-by: kbarrett, sangheki

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

8145092: Use Unified Logging for the GC logging
Summary: JEP-271. VM changes contributed by brutisso, test changes contributed by david.
Reviewed-by: sjohanss, david, brutisso
Contributed-by: bengt.rutisson@oracle.com, david.lindholm@oralce.com

8142341: GC: current flags need ranges to be implemented
Summary: Add explicit ranges and constraint for all gc flags
Reviewed-by: jwilhelm, gziemski, ddmitriev, tbenson

8136680: Enable adaptive IHOP by default
Reviewed-by: jmasa, mgerdin, ehelin

8136678: Implement adaptive sizing algorithm for IHOP
Summary: Add adaptive sizing for IHOP that maximizes throughput (starts marking as late as possible). This functionality is enabled using a new -XX:+G1AdaptiveIHOP switch (default: false).
Reviewed-by: mgerdin, jmasa, pliden

8141946: Remove develop flag G1TraceHeapRegionRememberedSet
Reviewed-by: mgerdin, tschatzl

8141530: Remove G1RecordHRRSOops and G1RecordHRRSEvents
Reviewed-by: tschatzl, mgerdin

8141394: Remove the instrumentation added by JDK-6898948
Reviewed-by: tschatzl, pliden

8134995: [REDO] GC: implement ranges (optionally constraints) for those flags that have them missing
Summary: Add ranges and constraint functions for GC flags.
Reviewed-by: kbarrett, jmasa, jwilhelm, gziemski, zmajo

8134972: [BACKOUT] GC: implement ranges (optionally constraints) for those flags that have them missing
Reviewed-by: jwilhelm

8067341: Modify PLAB sizing algorithm to waste less
Summary: Change the G1 PLAB resizing algorithm to waste less memory by being more conservative about the PLAB sizes.
Reviewed-by: ecaspole, jmasa

8078555: GC: implement ranges (optionally constraints) for those flags that have them missing
Summary: Add ranges and constraint functions for GC flags.
Reviewed-by: jmasa, kbarrett, gziemski, ddmitriev, drwhite

8130459: Add additional validation after heap creation
Summary: Some PLAB related flags' validation can happen after heap creation. Introduced additional stage of validation check.
Reviewed-by: coleenp, dholmes, kbarrett, gziemski, ecaspole, ddmitriev

8122937: [JEP 245] Validate JVM Command-Line Flag Arguments.
Summary: Validate the arguments to all JVM command-line flags so as to avoid crashes, and ensure that appropriate error messages are displayed when they are invalid.
Reviewed-by: ddmitriev, dholmes, kbarrett, drwhite, brutisso, coleenp

8079792: GC directory structure cleanup
Reviewed-by: brutisso, stefank, david