[issue911] panic on kldload

[Simon 'corecode' Schubert]

Sepherosa Ziehau wrote:
I don't think it's the problem of our M_WAITOK implementation.  You
could change the caller to use other kmalloc flag so that the system
will not panic; how to properly handle kmalloc failure in this case
may be difficult.
I realize this.  However, we should avoid panicing if possible.  So why 
not print a warning ("allocated more than the limit") and continue?  If 
nothing happens, great!  If we run out of memory, we still can panic later.

cheers
  simon