Summary: When refactoring the code for a previous fix, a condition was not correctly negated which prevents the G1 policy from adding the correct number of old regions to the CSet when the young gen size is fixed. The changeset also fixes a small syntactical issue in g1ErgoVerbose.hpp which is causing compiler warnings.
Reviewed-by: brutisso, ysr

Reviewed-by: johnc
Contributed-by: alejandro.murillo@oracle.com

Reviewed-by: brutisso, ysr

Summary: Make G1 handle young gen size command line flags more consistently
Reviewed-by: tonyp, jwilhelm

Summary: Fixed inconsistencies and mistakes in the young list target length calculations so that a) the calculated target length is optimal (before, it was not), b) other parameters like max survivor size and max gc locker eden expansion are always consistent with the calculated target length (before, they were not always), and c) the resulting target length was always bound by desired min and max values (before, it was not).
Reviewed-by: brutisso, johnc

Summary: Return correct answers from os::numa_*() for UMA machines or if NUMA API is not supported
Reviewed-by: johnc

Summary: If and when the reference handler thread is able to use the discovered field to link reference objects in its pending list, so will GC. In that case, GC will scan through this field once a reference object has been placed on the pending list, but not scan that field before that stage, as the field is used by the concurrent GC thread to link discovered objects. When ReferenceHandleR thread does not use the discovered field for the purpose of linking the elements in the pending list, as would be the case in older JDKs, the JVM will fall back to the old behaviour of using the next field for that purpose.
Reviewed-by: jcoomes, mchung, stefank

Summary: It introduces ergonomic decision logging in G1 for the following heuristics: heap sizing, collection set construction, concurrent cycle initiation, and partially-young GC start/end. The code has a bit of refactoring in a few places to make the decision logging possible. It also replaces alternative ad-hoc logging that we have under different parameters and switches (G1_DEBUG, G1PolicyVerbose).
Reviewed-by: johnc, ysr

Summary: InterpreterRuntime::popframe_move_outgoing_args() is required for the ARM interpreter.
Reviewed-by: kvn, twisti

Summary: ARM has instructions to move data directly between the fpu and integer registers.
Reviewed-by: kvn, never

Summary: Try using small pages when transparent huge pages allocation fails
Reviewed-by: ysr

Reviewed-by: kvn

Summary: Add check that ciEnv::_CallSite_klass is initialized.
Reviewed-by: jrose

Reviewed-by: kvn, twisti

Reviewed-by: twisti, roland, kvn, iveresov

Summary: Use BIS and prefetch in arraycopy stubs for Sparc (BIS for T4 only).
Reviewed-by: never, iveresov

Reviewed-by: never

Reviewed-by: johnc
Contributed-by: alejandro.murillo@oracle.com

Reviewed-by: never, kvn

Summary: Remove the sentinelRef and let the last Reference in a discovered chain point back to itself.
Reviewed-by: ysr, jmasa

Reviewed-by: never

Reviewed-by: iveresov, kvn

Summary: Remove the macro assembler routine br_on_reg_cond() and replace the remaining calls to that routine with an equivalent.
Reviewed-by: kvn, iveresov

Summary: Replace set() with patchable_set() to generate 8 instructions always.
Reviewed-by: iveresov, never, roland