Re: [Qemu-devel] [RFC 3/3] docs: document virtio-balloon stats

[Luiz Capitulino]

On Fri, 7 Dec 2012 05:30:17 +0000
Dietmar Maurer <address@hidden> wrote:

> > +The memory statistics are:
> > +
> > + o stat-swap-in
> > + o stat-swap-out
> > + o stat-major-faults
> > + o stat-minor-faults
> > + o stat-free-memory
> > + o stat-total-memory
> 
> I want to implement an automatic ballooning policy, so I need to
> know the amount of free RAM inside the guest.
> 
> But it seem that the balloon driver reports free ram without accounting
> buffers and cache.
> 
> Is it possible to extent those statistic to include buffer/cache values?

Yes, should be possible but the kernel virtio-balloon driver has to be
extended too (and I suspect this kind of change goes into the kernel first).