Why is only 11 GB used of my 12 GB swap file ?

[Sreyan Chakravarty]

Hi,

I have created my swap file using the command:

          dd if=/dev/zero of=/fedora.swap bs=1M count=12288 status=progress

So this should produce a 12 GB file right ?

I can confirm it does:

$  ls -lh /fedora.swap
-rw-------. 1 root root 12G Nov 27 20:23 /fedora.swap

So why is the swap memory in my system reported as 11 GB by the free
command  ?

$  free -h
                           total        used        free      shared
 buff/cache   available
Mem:          7.7Gi       1.4Gi       4.5Gi       394Mi       1.8Gi
5.6Gi
Swap:          11Gi          0B        11Gi


Why is it 11 GB ? Shouldn't it be 12 GB ?

Am I missing something?

What is the reason for this?
-- 
Regards,
Sreyan Chakravarty