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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?



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