Hi Zhi Yong,

[cut...]

+3. The Design
+
+These include the following parts:
+
+    * Hooks in existing vfs functions to track data access frequency
+
+    * New rbtrees for tracking access frequency of inodes and sub-file

             ^^^^^^^ s/rbtrees/radix-trees

+ranges (hot_rb.c)

           ^^^^^^^^ Now it seems that all codes are in the same file.

Regards,
Zheng