2015-06-18 1:40 GMT+03:00 Andrey Korolyov <andrey@xdel.ru>:
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.
I have debian wheezy guests with 3.4 kernels (or 3.2..) and many others like 32 centos 6, opensue , ubuntu, and other. Does memory hotplug works with this distros (kernels)? -- Vasiliy Tolstov, e-mail: v.tolstov@selfip.ru