/dev/vn0
/dev/vn0s0
==A==
swapon: adding /dev/vn0 as swap device
rc=0
Device          512-blocks     Used    Avail Capacity  Type
/dev/vbd0s1b       8388608        0  8388608     0%    Interleaved
/dev/vn0           4194304        0  4194304     0%    Interleaved
Total             12582912        0 12582912     0%
==B==
swapon: adding /dev/vn0s0 as swap device
rc=0
Device          512-blocks     Used    Avail Capacity  Type
/dev/vbd0s1b       8388608        0  8388608     0%    Interleaved
/dev/vn0           4194304        0  4194304     0%    Interleaved
/dev/vn0s0         4194304        0  4194304     0%    Interleaved
Total             16777216        0 16777216     0%
==CLEANUP==
swapoff: removing /dev/vn0s0 as swap device
swapoff: removing /dev/vn0 as swap device
Device          512-blocks     Used    Avail Capacity  Type
/dev/vbd0s1b       8388608        0  8388608     0%    Interleaved
cleaned