top shows '<swapped>'

[Ken Chen]

When I use 'top' command to check my system, some processes are shown like
'<php>'. The manual told these processes are swapped out.

But my problem is .. I don't have swapping device (swapoff -a). Where are
they swapped to ?

last pid: 29144;  load averages:  0.69,  0.67,  0.82
up 19+11:25:27  21:05:03
89 processes:  1 running, 88 sleeping
CPU states:  1.2% user,  0.0% nice,  0.9% system,  0.0% interrupt, 97.8%idle
Mem: 309M Active, 27M Inact, 127M Wired, 19M Cache, 60M Buf, 4136K Free
Swap:

  PID USERNAME  THR PRI NICE   SIZE    RES STATE  C   TIME   WCPU COMMAND
29141 nobody      1   4    0 37164K 15932K select 0   0:00  4.55% php
28856 nobody      1   4  -15 36936K  7612K sbwait 0   0:44  1.66% php
                   .
                   .
                   .
29116 nobody      1   4  -15 33732K 13140K accept 0   0:00  0.00% php
24937 nobody      1   8  -15 31740K     0K wait   1   0:00  0.00% <php>
24948 nobody      1   8  -15 31740K     0K wait   0   0:00  0.00% <php>
24931 nobody      1   8  -15 31740K     0K wait   0   0:00  0.00% <php>
24950 nobody      1   8  -15 31740K     0K wait   1   0:00  0.00% <php>
24932 nobody      1   8  -15 31740K   220K wait   1   0:00  0.00% php
                   .
                   .
                   .