quoted

You could perhaps copy the readdir hack into btrfs code for use with
obsolete kernels -- but to be honest I'd be inclined to leave that for
the masochists^Wenterprise folks.
    

We do need the readdir hack, being able to test on older kernels (say
2.6.26) is a big part of attracting and keeping btrfs testers.
  

Guess you're talking about the saddistic people like me?

Rei