- Do i have to edit the Linux swap partition to have it recognised as swap by NetBSD?
in short, you cannot use the same partition for swap unless you want to hack around. No idea if this old guide is still relevant nor if this can be applied to NetBSD, but it could be worth a try )
3. Sharing swap space between Linux and FreeBSD https://tldp.org/HOWTO/Linux+FreeBSD-3.html -pph