LorDClockaN/platform_device_htc_ace — pull request #1 by splatterb0y (2012-01-24 02:12:55+00:00)
Title: This should improve the performance of all I/O operations. 

Explanation:
* noatime, nodiratime -> dont save file and directory access time
* barrier=0 -> disable write barrier
* nouser_xattr -> disable extended user attributes (not needed an android)

Source:
http://blog.loxal.net/2009/04/tuning-ext4-for-performance-with.html