8171452: (ch) linux io_util_md: Operation not supported exception after 8168628
Summary: On Linux, fall back to ftruncate64() if fallocate64() fails
Reviewed-by: mdoerr, alanb

8168628: (fc) SIGBUS when extending file size to map it
Summary: Synchronize file extension and subsequent map0(); on Linux use fallocate64() instead of ftruncate64().
Reviewed-by: rehn, simonis, alanb

4823133: RandomAccessFile.length() is not thread-safe
Summary: RandomAccessFile.length() is not thread-safe
Reviewed-by: rriggs, dfuchs, martin, dsamersoff

8023173: FileDescriptor should respect append flag
Reviewed-by: martin, alanb, rriggs

8057777: Cleanup of old and unused VM interfaces
Reviewed-by: coleenp, hseigel, alanb, sherman

8054834: Modular Source Code
Reviewed-by: alanb, chegar, ihse, mduigou
Contributed-by: alan.bateman@oracle.com, alex.buckley@oracle.com, chris.hegarty@oracle.com, erik.joelsson@oracle.com, jonathan.gibbons@oracle.com, karen.kinnear@oracle.com, magnus.ihse.bursie@oracle.com, mandy.chung@oracle.com, mark.reinhold@oracle.com, paul.sandoz@oracle.com