6865703: G1: Parallelize hot card cache cleanup Summary: Have the GC worker threads clear the hot card cache in parallel by having each worker thread claim a chunk of the card cache and process the cards in that chunk. The size of the chunks that each thread will claim is determined at VM initialization from the size of the card cache and the number of worker threads. Reviewed-by: jmasa, tonyp

Merge

6843292: "Expect to be beyond new region unless impacting another region" assertion too strong Summary: In the assertion allow for collision with the guard page. Reviewed-by: tonyp, ysr, jcoomes

6862534: -XX:NewRatio completely ignored when combined with -XX:+UseConcMarkSweepG Summary: Use NewRatio if it is explicitly set. Reviewed-by: ysr, jcoomes

Merge

6866591: G1: print update buffer processing stats more often Summary: It adds parameter -XX:+G1SummarizeRSetStatsPeriod that causes update buffer processing information to be printed periodically. It also includes two small formatting changes. Reviewed-by: jmasa, jcoomes, ysr

6864886: G1: rename -XX parameters related to update buffers Summary: renaming a couple of update buffer-related parameters to make them more understandable and consistent. Reviewed-by: iveresov, ysr

Merge