BTRFS in 2.6.31-rcwhatever

[Matej Cepl]

Josef Bacik, Wed, 17 Jun 2009 12:27:34 -0400:
> Btrfs will not be as stable as ext4 currently is for at least another
> year, so it is still very much just for testing.  I am very interested
> in hearing about bugs and getting them fixed, however there will be
> little to nothing that I can do if you lose data.

And just to increase appetite of masochists among us, this is meant very 
seriously ... I have lost /var partitions on two computers (Fedora 
without /var/lib/rpm is very interestig animal). Pray without cessation 
and have your backups ready.

Matěj