Review request: (turn off transparent huge pages) 8024838: Significant slowdown due to transparent huge pages

[Stefan Karlsson]

Please review this change to turn off transparent huge pages by default.

http://cr.openjdk.java.net/~stefank/8024838/webrev.00/

8024838: Significant slowdown due to transparent huge pages
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: TBD1, TBD2

thanks,
StefanK