Re: [libvirt] [Qemu-devel] incorrect memory size inside vm

Yes, but I`m afraid that I don`t fully understand why do you need this when pure hotplug mechanism is available, aside may be nice memory stats from balloon and easy-to-use deflation. Just populate a couple of static dimms with small enough 'base' e820 memory and use balloon on this setup, you`ll get the reserved memory footprint as small as it would be in setup with equal overall amount of memory populated via BIOS. For example, you may use -m 128 ... {handful amount of memory placed in memory slots} setup to achieve the thing you want.