swap never gets used

[Mark Barr <MBarr@infoglide.com>]

Hi all-

I am running 2.4.20-ben8 on an iBook. I have 384 megs of RAM, and a 400 meg
swap partition.

fdisk -l yields:

dump: name /dev/hda len 8 
/dev/hda1     Apple_partition_map Apple                    63 @ 1        (
31.5k)  Partition map
/dev/hda2         Apple_Bootstrap bootstrap              1600 @ 64
(800.0k)  NewWorld bootblock
/dev/hda3         Apple_UNIX_SVR2 swap                 819200 @ 1664
(400.0M)  Linux swap
/dev/hda4         Apple_UNIX_SVR2 root               28481760 @ 820864   (
13.6G)  Linux native
/dev/hda5              Apple_Boot MOSX_OF3_Booter       16384 @ 29302624 (
8.0M)  Unknown
/dev/hda6            Apple_Loader SecondaryLoader        1024 @ 29319008
(512.0k)  Unknown
/dev/hda7               Apple_UFS MacOSX             29285080 @ 29320032 (
14.0G)  Unknown
/dev/hda8              Apple_Free                           8 @ 58605112 (
4.0k)  Free space

and running 'dmesg | grep swap' yields the two lines:

Starting kswapd
Adding Swap: 409592k swap-space (priority -1)

But when I attempt to use ant to compile our large project at work (with a
little over a thousand java files), I get an out of memory expception.
Running 'top' shows me that my memory gets used up (as I would kind of
expect), but 'used swap' never leaves 0k. The swap is simply not being used.

I tried 'swapon /dev/hda3', but got 'device or resource busy'

Can anyone think of what I might be doing wrong?

Thanks,
Mark