Re: [libvirt] [v7 00/10] Support cache tune in libvirt

On Sun, Feb 19, 2017 at 12:01:57PM -0300, Marcelo Tosatti wrote: > > How does the management software query the amount of allocatable cache > again? > > Section from another discussion: > > > The second case is necessary to get updated free space information. > > > > Just VM initialization time could be enough as virConnectGetCapabilities > would just know the total and free size would be reported in an API (if > I rememer the discussion correctly) > > Martin Yes, i think this is missing because the interface was designed with only libvirt in mind: the "reserved" field returns the amount of cache reserved only by VMs. So if there is another application on the same L3 socket with a cache reservation, "reserved" fails to report it. Eli can you expose the amount of free allocatable cache space (where non-free includes space used by other reservations) in a 'free_space' field in the cache output of virConnectGetCapabilities?