I have been renting a VPS with 2 vcpu and 2Gb of RAM. The default OS is Ubuntu 24.04.
When I checking the system info using top/htop, it is specified that the total RAM capacity of my VPS is 2GB. But when I switched to #openBSD htop show me that my total RAM is 1Gb.
the dmesg says "irtio0 at pci0 dev 3 function 0 "Qumranet Virtio Memory Balloon" rev 0x00"
what exactly is this Balloon?