On Thu, Aug 02, 2012 at 03:41:03PM +0200, Olivier Bonvalet wrote:

Yes... it's a copy from my /var/log/kern.log. Is it really "disabled" ?

I was mistaken, it really is enabled unconditionally in ctree.h:55.
Josef says that the V0 extent refs are not used for a long time, so the
question is how did they appear in your filesystem. Did you switch to a
new kernel from a very old one?


david