[linux][mm] mmap函数剖析

review url:

http://blog.csdn.net/pcwung/article/details/7077991

http://blog.chinaunix.net/uid-24517893-id-164217.html

http://blog.csdn.net/sandflee/article/details/5334192

http://www.233.com/linux/fudao/20110105/140339473-3.html

http://blog.chinaunix.net/uid-20235103-id-1970820.html

Q:mmap之后的页面属性？？？内部对usr address的转化？？？