Does swapon work?
Nokia-N900:~# swapon -a swapon: /dev/mmcblk1p2: Device or resource busy swapon: /dev/mmcblk0p3: Device or resource busy Nokia-N900:~# swapoff /dev/mmcblk0p3 Nokia-N900:~# swapon /dev/mmcblk0p3 Nokia-N900:~# swapon /dev/mmcblk1p2 swapon: /dev/mmcblk1p2: Device or resource busy Nokia-N900:~# swapoff /dev/mmcblk1p2 Nokia-N900:~# swapon /dev/mmcblk1p2 Nokia-N900:~#