How do you create a swap file on btrfs?

General system
1

This is the first time I am using btrfs. How do you create a swap file on btrfs? What might be the fstab line for it? Is it the same as for a partition with ext fs?

2

https://wiki.archlinux.org/index.php/Btrfs#Swap_file

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3

Swap files on btrfs require special handling.

You need to create a subvolume without snapshots.

Then you create the swapfile and disable COW.

Take a look at the Arch wiki:
https://wiki.archlinux.org/index.php/Btrfs#Swap_file

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4

Ok, thanks, both of you!

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