just what does kserel mean?

[Nestor Wheelock]

I have searched all over the net for a good definition of what the top 
state, "kserel" means.  When I run mysql this is the state in which it 
runs.

   PID USERNAME  THR PRI NICE   SIZE    RES STATE  C   TIME   WCPU COMMAND
  2117 mysql      17  20    0   323M 59080K kserel 0   0:02  0.00% mysqld


I'm a newbie with freebsd and am concerned that this might be some sort of 
problem since my installation of Mysql turned out to be rather 
challenging.

Thanks,
Nestor