Ext4 debugging support

configname: CONFIG_EXT4_DEBUG

Linux Kernel Configuration
└─>File systems
└─>Ext4 debugging support
In linux kernel since version 2.6.32 (release Date: 2009-12-02)  
Enables run-time debugging support for the ext4 filesystem.

If you select Y here, then you will be able to turn on debugging
using dynamic debug control for mb_debug() / ext_debug() msgs.