Heyla,
is kernfs working for anyone these days?  Seems to have died for me at
least a few months back.  Maybe I've a wonky config somewhere.

Filesystem  1K-blocks      Used     Avail Capacity  Mounted on
kernfs              1         1         0   100%    /kern

% ls -l /kern/
total 32
-r--r--r--  1 root  wheel            11 Jun  9 14:32 boottime
-r--r--r--  1 root  wheel           248 Jun  9 15:34 copyright
-rw-r--r--  1 root  wheel            18 Jun  9 15:34 hostname
-r--r--r--  1 root  wheel             4 Jun  9 15:34 hz
-r--r--r--  1 root  wheel            20 Jun  9 15:34 loadavg
-r--r--r--  1 root  wheel         32752 Jun  9 15:34 msgbuf
-r--r--r--  1 root  wheel             5 Jun  9 15:34 pagesize
-r--r--r--  1 root  wheel             7 Jun  9 15:34 physmem
brw-r-----  1 root  operator       0, 0 Apr 28  2003 rootdev
crw-r-----  1 root  operator       3, 0 Dec 21  2003 rrootdev
-r--r--r--  1 root  wheel            18 Jun  9 15:34 time
-r--r--r--  1 root  wheel           115 Jun  9 15:34 version

% cat -v /kern/[a-qs-z]*
%

rootdev/rrootdev do seem to be working.  Everything else is dead.

Regards,
Geoff