pagedaemon & update MEM usage

[Mark Spivak <spivak_(_at_)_research_(_dot_)_suspicious_(_dot_)_org>]

hi.  why does ps show the pagedaemon and update using -644.2% of the
system memory?

root         2  0.0 -644.2     0 -841740 ??  DL     9:06AM    0:00.01
(pagedaemon)
root         3  0.0 -644.2     0 -841740 ??  DL     9:06AM    0:00.06
(update)
root         0  0.0 -644.2     0 -841740 ??  DLs    9:06AM    0:00.01
(swapper)