btrfs-man5(5) — BTRFS documentation

Tue Mar 22 2022 03:56:40 GMT+0000 (Coordinated Universal Time)

Saved by @jay

# truncate -s 0 swapfile
# chattr +C swapfile
# fallocate -l 2G swapfile
# chmod 0600 swapfile
# mkswap swapfile
# swapon swapfile

在btrfs上创建swap