"Lately I have described ok_defrag--a simple tool for
defragmenting Linux file systems. Today, I want to describe a
specialized program designed to defrag the new Ext4 file
"To begin playing with e4defrag we must start compile of new
kernel with patches needed to carry out the defragmentation. Below
you will find a short description of that process, and if you would
not like to use all those experimental patches for Ext4, then you
should be interested in these seven only..."