8040245: G1: VM hangs during shutdown Summary: temporarily disable the shutdown of the concurrent GC threads introduced in JDK-8037112 Reviewed-by: brutisso, tschatzl, jmasa

8040722: G1: Clean up usages of heap_region_containing Reviewed-by: tschatzl, jmasa

8040002: Clean up code and code duplication in re-diryting cards for verification Summary: Card re-dirtying code for verification and actual redirtying uses two different, almost completely identical card closures. Also the verification code still assumes a perm gen. Reviewed-by: brutisso, jmasa

8019342: G1: High "Other" time most likely due to card redirtying Summary: Parallelize card redirtying to decrease the time it takes. Reviewed-by: brutisso

8028710: G1 does not retire allocation buffers after reference processing work Summary: G1 does not retire allocation buffers after reference processing work when -XX:+ParallelRefProcEnabled is enabled. This causes wrong calculation of PLAB sizes, as the amount of space wasted is not updated correctly. Reviewed-by: brutisso

8039596: Remove HeapRegionRemSet::clear_incoming_entry Summary: The mentioned method is never used and out of date. So it is removed. Reviewed-by: mgerdin, brutisso

8037344: Use the "next" field to iterate over fine remembered instead of using the hash table Summary: After changes to the PerRegionTable where all these PRTs are linked together in an additional field, simplify iterating over all PRTs by using these links instead of walki Reviewed-by: mgerdin, jwilhelm, brutisso

8027553: Change the in_cset_fast_test functionality to use the G1BiasedArray abstraction Summary: Instead of using a manually managed array for the in_cset_fast_test array, use a G1BiasedArray instance. Reviewed-by: brutisso, mgerdin

8038930: G1CodeRootSet::test fails with assert(_num_chunks_handed_out == 0) failed: No elements must have been handed out yet Summary: The test incorrectly assumed that it had been started with no other previous compilation activity. Fix this by allowing multiple code root free chunk lists, and use one separate from the global one to perform the test. Reviewed-by: brutisso

8039957: Replace the last few %p usages with PTR_FORMAT in the GC code Reviewed-by: jwilhelm, sjohanss, 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

Merge