hammer_alloc_data panic

[Simon 'corecode' Schubert]

Sascha Wildner wrote:
Matthew Dillon wrote:
    This is really a documentation issue.  HAMMER partitions must be
    reblocked occassionally, preferably via cron and preferably before
    you actually run out of disk space. 
I suggest that until we have some automatic reblocking mechanism, we 
should add a etc/periodic/daily script which reblocks all mounted hammer 
file systems.
We absolutely need this.  People will complain left and right if it 
isn't "just" working.

Probably I'm missing something, but can't we reserve N blocks for 
reblocking purposes, so that the reblocker always can make progress?

Why wouldn't the reblocker anyways start with the almost empty blocks? 
Which order is it picking right now?

cheers
  simon