Summary: Don't turn on transparent huge pages (-XX:+UseTransparentHugePages) unless explicitly specified on the command line. This has the effect that large pages are never turned on Linux unless the user has explicitly enabled any of the large pages flags: -XX:+UseLargePages, -XX:+UseTransparentHugePages, -XX:+UseHugeTLBFS, and -XX:+UseSHM.
Reviewed-by: jwilhelm, tschatzl, brutisso

Summary: Using CHECK_NULL when calling multi_allocate() from the corresponding reflection code; added test for this condition
Reviewed-by: dholmes, minqi
Contributed-by: NMikhailo Seledtsov <mikhailo.seledtsov@oracle.com>

8013726: runtime/memory/ReserveMemory.java fails due to 'assert(bytes % os::vm_allocation_granularity() == 0) failed: reserve block size'
Summary: Fix regression test to work on all platforms
Reviewed-by: ctornqvi, dholmes

Summary: Reserved memory had PROT_READ+PROT_WRITE access on Linux/bsd, now changed to PROT_NONE.
Reviewed-by: dholmes, ctornqvi