UVM/genfs review

[Joerg Sonnenberger <joerg%britannica.bec.de@localhost>]

Hi all,
given the state of netbsd-5, I would like to get the WAPBL patch
http://mail-index.netbsd.org/current-users/2008/10/31/msg005591.html
into HEAD and pull it up. For that I would really like to have review
from someone who understand UVM and/or genfs. The patch is likely to
break persistent snapshots with fss(4), but I don't think it will break
non-persistent ones (e.g. as used for backups).

Joerg