```bash
# dmesg | grep swap
[    0.043122] Spectre V1 : Mitigation: usercopy/swapgs barriers and __user pointer sanitization
[    0.647761] zswap: loaded using pool lz4/z3fold
[   24.685071] swapon: swapfile has holes


# blkid
/dev/vda1: UUID="0d5209da-5a65-4a73-a62d-0f8eff8a61e4" BLOCK_SIZE="4096" TYPE="ext4" PARTUUID="216d703c-01"

# mount | grep vda
/dev/vda1 on / type ext4 (rw,relatime)

# uname -a
Linux ArchLinux 5.8.8-arch1-1 #1 SMP PREEMPT Wed, 09 Sep 2020 18:59:45 +0000 x86_64 GNU/Linux

```