8129440: G1 crash during concurrent root region scan Summary: Make concurrent memory accesses to oops on the heap volatile to avoid reloading by the compiler duplicating oop loading code. Reviewed-by: ehelin, eosterlund

8180280: [TESTBUG] Test for JDK-8180048 Summary: Add test at is executed only at higher tiers to allow more time for execution. Reviewed-by: kbarrett, eosterlund

8137099: G1 needs to "upgrade" GC within the safepoint if it can't allocate during that safepoint to avoid OoME Summary: During a minor GC, if memory allocation fails, start a full GC within the same VM operation in the same safepoint. This avoids a race where the GC locker can prevent the full GC from occurring, and a premature OoME. Reviewed-by: ehelin, sjohanss, phh Contributed-by: thomas.schatzl@oracle.com, axel.siebenborn@sap.com

8193352: SA: Test for the clhsdb 'thread' and 'threads' commands Summary: Test for the clhsdb 'thread' and 'threads' commands. Avoids an incorrect 'Couldn't find thread -a' being printed. Reviewed-by: sspitsyn, sballal

6640188: Methods com.cun.attach.VirtualMachine.load... don't throw NullPointerxception Reviewed-by: sspitsyn

8193063: Enabling narrowOop values for RawAccess accesses Reviewed-by: pliden, kbarrett

8194824: Add gc/stress/gclocker/TestGCLockerWithParallel.java to the ProblemList file Reviewed-by: ehelin, kbarrett

8194814: [ppc, s390] A row of minor fixes and cleanups Summary: Fix the data types of pd flags. Reviewed-by: mdoerr

8191985: JDK-8190862 work for arch arm Summary: Fixed Interpreter never refills TLAB Reviewed-by: dsamersoff, aph

8194636: Apply CONCURRENCY_FACTOR to max value in concurrency calculation Reviewed-by: erikj