8031686: G1: assert(_hrs.max_length() == _expansion_regions) failed Summary: Using pointer_delta to avoid overflowing pointer calculation. Reviewed-by: jmasa, tschatzl

8030177: G1: Enable TLAB resizing Reviewed-by: tschatzl, stefank, jmasa

8025856: Fix typos in the GC code Summary: Fix about 440 typos in comments in the VM code Reviewed-by: mgerdin, tschatzl, coleenp, kmo, jcoomes

8032379: Remove the is_scavenging flag to process_strong_roots Summary: Refactor the strong root processing to avoid using a boolean in addition to the ScanOption enum. Reviewed-by: stefank, tschatzl, ehelin, jmasa

8020277: Young GC could be extremely slow due to assertion in ObjectStartArray::object_starts_in_range 8009462: Young GC's (ParNewGC and SerialGC) have unexpected variances. Summary: Removed the assertion slowing down GC. Reviewed-by: stefank, mgerdin

8031776: Remove the unnecessary enum GenRemSet::Name Reviewed-by: stefank, tschatzl, jwilhelm

8027746: Remove do_gen_barrier template parameter in G1ParCopyClosure Summary: Remove the above mentioned template parameter and related unused code. Also remove some classes that are never used. Reviewed-by: stefank, mgerdin, jwilhelm

8027454: Do not traverse string table during G1 remark when treating them as strong roots during initial mark Summary: Do not try to unlink string table entries unconditionally during remark. This is without side effects as the preceding initial mark always uses the string table as strong roots. Needs to be fixed with class unloading during concurrent mark. Reviewed-by: brutisso, mgerdin

8027476: Improve performance of Stringtable unlink 8027455: Improve symbol table scan times during gc pauses Summary: Parallelize string table and symbol table scan during remark and full GC. Some additional statistics output if the experimental flag G1TraceStringSymbolTableScrubbing is set. Reviewed-by: mgerdin, coleenp, brutisso

Merge