XFree86 + NVidia drivers use all my swap-space!

[Mike Williams <mikew@cortexebusiness.com.au>]

I've noticed that XFree86 seems to claim a whole bunch of swap-space on my
box, and that msot of it is non-resident.  The memory usage shot right up
when I installed the NVidia-GLX drivers.  Here's the output of top(1):

  CPU states:   1.2% user,   2.4% system,   0.0% nice,  96.4% idle
  Mem:    384848K total,   359340K used,    25508K free,    60760K buffers
  Swap:   251868K total,    44408K used,   207460K free,   204616K cached
  
    PID USER     PRI  NI  SIZE  RSS SHARE STAT %CPU %MEM   TIME COMMAND
    741 root       8 -10  210M  33M 11504 S <   0.5  8.8   7:53 XFree86

Is this normal??  What's it doing with all that swap-space?

-- 
cheers, Mike