Request for review 7191817: -XX:+UseSerialGC -XX:+UseLargePages crashes with SIGFPE on Mac OS X

[harold seigel]

Summary: Support for the -XX:+UseLargePages flag causes crashes on BSD 
platforms such as MacOS X.  This proposed change adds code to print out 
a message if -XX:+UseLargePages is specified on this platform and to 
then ignore the flag.

Open webrev at http://cr.openjdk.java.net/~coleenp/bug_7191817 
<http://cr.openjdk.java.net/%7Ecoleenp/bug_7191817>

Bug link at http://bugs.sun.com/view_bug.do?bug_id=7191817

This change was tested with JPRT and JCK tests. Also, tests were run by 
hand on a MacOS X machine specifying the -XX:+UseLargePages flag to make 
sure that the message was output and no crashes occurred.

Thanks, Harold