7096030: G1: PrintGCDetails enhancements 7102445: G1: Unnecessary Resource allocations during RSet scanning Summary: Add a new per-worker thread line in the PrintGCDetails output. GC Worker Other is the difference between the elapsed time for the parallel phase of the evacuation pause and the sum of the times of the sub-phases (external root scanning, mark stack scanning, RSet updating, RSet scanning, object copying, and termination) for that worker. During RSet scanning, stack allocate DirtyCardToOopClosure objects; allocating these in a resource area was causing abnormally high GC Worker Other times while the worker thread freed ResourceArea chunks. Reviewed-by: tonyp, jwilhelm, brutisso

7099824: G1: we should take the pending list lock before doing the remark pause Summary: Acquire the pending list lock in the prologue method of G1's concurrent VM_Operation and release the lock in the epilogue() method. The locking/unlocking order of the pending list lock and the Heap_lock should match that in the prologue and epilogue methods of VM_GC_Operation. Reviewed-by: tonyp, ysr

Merge

7097516: G1: assert(0<= from_card && from_card<HeapRegion::CardsPerRegion) failed: Must be in range. Summary: Introduced a version of is_in_reserved() that looks at _orig_end as opposed to _end. Reviewed-by: tonyp, stefank