Originally posted by arubin
Does that mean that when the system is shutdown the swap partition is empty?
No, the swappartition is left as is,
when the operatingsystem boots up,
it wil initialize the swap as if it was dirty,
and will cleanup the parts before writing to it.
The OS asumes it is the only active OS writing to the swappartition,
and will write pretty anywhere it feels fit.
So, to answer the original question:
No, don't share swap between to OSses running simultaniously.
Yes, it is ok toouse one swap between OSses while dual(tripple) booting.