title: How to enable tree representation of directory entries for ext4?
body: <p>I need to create several millions of relatively small files (1-1000 short lines at average) having a complex directory layout. That's why it's very important to ensure fast traversal through deeply nested (5-10 levels) directories (each one can contain up to 10,000 entries).</p>
  
  <p>How can I enable support of tree representation of directory entries (which exists starting from ext3) in order to improve file addition performance?</p>