Thinking about partitions

Trying to make some decision about partitions to carry out LFS 2.4 Creating a New Partition.

After reading the manual, material online, the hints, the explanations of the hints, none of which I understood, I started to come to the conclusion that:

–I’ll have only one /boot/EFI partition on the drive. On it, Ubuntu GRUB will control the dual boot of Ubuntu and LFS.

–I won’t have a swap partition as I don’t understand how to implement it and it seems controversial anyway. It will be interesting to see if things will compile ok without it or no.

Possible partitions:

sda1  vfat  1.13 GiB - existing
sda2 ext4 190 GB - Ubuntu
sda3 ext4 30 GB - LFS
sda4 ext4 30 GB - Extra - could put another LFS here or Arch