On 01.04.19 16:47, Michael S. Tsirkin wrote: > On Mon, Apr 01, 2019 at 04:11:42PM +0200, David Hildenbrand wrote: >>> The interesting thing is most probably: Will the hinting size usually be >>> reasonable small? At least I guess a guest with 4TB of RAM will not >>> suddenly get a hinting size of hundreds of GB. Most probably also only >>> something in the range of 1GB. But this is an interesting question to >>> look into. >>> >>> Also, if the admin does not care about performance implications when >>> already close to hinting, no need to add the additional 1Gb to the ram size. >> >> "close to OOM" is what I meant. > > Problem is, host admin is the one adding memory. Guest admin is > the one that knows about performance. If we think about guest admins only caring about performance, then a guest admin owill unloads virtio-balloon module to a) get all the memory available (inflated memory returned to the guest) b) not use hinting :) But I get your idea. One side wants hinting, other side has to agree. -- Thanks, David / dhildenb
