Summary: Prevent eager reclaim of objects that might be on mark stack.
Reviewed-by: brutisso, tschatzl

Summary: Push the remembered sets of large objects with few referenced into the dirty card queue at the beginning of the evacuation so that they may end up with zero remembered set entries at the end of the collection, and are potentially reclaimed. Also improve timing measurements of the early reclaim mechanism, and shorten flag names.
Reviewed-by: brutisso, jmasa, dfazunen

Reviewed-by: tschatzl, ecaspole

Reviewed-by: jmasa, jwilhelm

Reviewed-by: tschatzl, jwilhelm

Summary: Allow use of large pages for auxiliary data structures in G1. Clean up existing interfaces.
Reviewed-by: jmasa, pliden, stefank

Reviewed-by: jmasa

Reviewed-by: jmasa, dfazunen

8062957: Heap is not shrunk when deallocating under memory pressure
Summary: Added explicit -XX:-ExplicitGCInvokesConcurrent to invocations
Reviewed-by: brutisso, tschatzl

8060467: CMS: small OldPLABSize and -XX:-ResizePLAB cause assert(ResizePLAB || n_blks == OldPLABSize) failed: Error
Reviewed-by: tschatzl, jmasa, kbarrett

8052172: Evacuation failure handling in G1 does not evacuate all objects if -XX:-G1DeferredRSUpdate is set
Summary: Remove -XX:-G1DeferredRSUpdate functionality as it is racy. During evacuation failure handling, threads where evacuation failure handling occurred may try to add remembered sets to regions which remembered sets are currently being scanned. The iterator to handle the remembered set scan does not support addition of entries during scan and so may skip valid references.
Reviewed-by: iveresov, brutisso, mgerdin

Summary: Ergonomics updates flags for number of GC threads
Reviewed-by: tschatzl, jwilhelm
Contributed-by: sangheon.kim@oracle.com

Reviewed-by: jmasa

Reviewed-by: jmasa, dfazunen

8058475: TestCMSClassUnloadingEnabledHWM.java fails with '.*CMS Initial Mark.*' missing from stdout/stderr
Reviewed-by: mgerdin, tschatzl, brutisso

Summary: Enable shrinking within the heap by removing some code added for JDK-8054818. Enable the test case that checks that again too.
Reviewed-by: jwilhelm, jmasa

8037925: CMM Testing: an allocated humongous object at the end of the heap should not prevents shrinking the heap
Summary: New test added.
Reviewed-by: ehelin, tschatzl, jwilhelm
Contributed-by: andrey.x.zakharov@oracle.com

Summary: Add missing unit test.
Reviewed-by: tschatzl
Contributed-by: NLeonid Mesnik <leonid.mesnik@oracle.com>

8058801: G1TraceReclaimDeadHumongousObjectsAtYoungGC only prints humongous object liveness output when there is at least one candidate humongous object
Summary: If G1TraceReclaimDeadHumongousObjectsAtYoungGC is enabled, always print humongous object liveness output.
Reviewed-by: tschatzl
Contributed-by: sangheon.kim@oracle.com

Reviewed-by: stefank, jmasa

Summary: Do not try to verify timing measures for the redirty logged cards phase when it is not executed.
Reviewed-by: brutisso, jmasa

Summary: Do not try to verify timing measures for the redirty logged cards phase when it is not executed.
Reviewed-by: brutisso, jmasa

Summary: Eager reclaim also needs to clear marks of eagerly reclaimed regions if they have already been marked during concurrent mark.
Reviewed-by: jmasa

Summary: Eager reclaim also needs to clear marks of eagerly reclaimed regions if they have already been marked during concurrent mark.
Reviewed-by: jmasa

Summary: Try to reclaim humongous objects at every young collection after doing a conservative estimate of its liveness.
Reviewed-by: brutisso, mgerdin

Summary: Try to reclaim humongous objects at every young collection after doing a conservative estimate of its liveness.
Reviewed-by: brutisso, mgerdin

Reviewed-by: ehelin, jwilhelm

Summary: Added -XX:+/-ClassUnloadingWithConcurrentMark
Reviewed-by: jmasa, brutisso, mgerdin

8051883: TEST.groups references missing test: gc/class_unloading/TestCMSClassUnloadingDisabledHWM.java
Reviewed-by: brutisso, tschatzl, ehelin, jmasa, dfazunen

Summary: Give the test a time limit of approximately one minute so that it exits early on slow machines.
Reviewed-by: ehelin, dfazunen, brutisso

Reviewed-by: mgerdin, jwilhelm

Summary: Added respect for available memory. Renamed function names
Reviewed-by: jwilhelm, tschatzl
Contributed-by: andrey.x.zakharov@oracle.com

8041946: CMM Testing: 8u40 an allocated humongous object at the end of the heap should not prevents shrinking the heap
Summary: New test added
Reviewed-by: jwilhelm, tschatzl
Contributed-by: andrey.x.zakharov@oracle.com

Reviewed-by: jmasa, sjohanss

Summary: Also reviewed by: sangheon.kim@oracle.com
Reviewed-by: brutisso

Summary: Check that native memory is returned to the system when decommiting memory within the heap with G1.
Reviewed-by: tschatzl, jwilhelm
Contributed-by: NAndrey Zakharov <andrey.x.zakharov@oracle.com>

Reviewed-by: jmasa, stefank

Summary: Add test case for the VerifySilently flag.
Reviewed-by: brutisso

Summary: Detailed breakdown of time spent in the evacuation failure handling phases to make the "Other" time roughly correspond to the sum of its parts.
Reviewed-by: jwilhelm, jmasa

Summary: Show the time taken by card redirtying during GC in a new "Redirty Cards" line.
Reviewed-by: jwilhelm, brutisso