Re: [RFC 1/5] meminfo: add a per node counter for balloon drivers

[David Hildenbrand]

On 13.03.25 08:20, Michael S. Tsirkin wrote:
> On Wed, Mar 12, 2025 at 11:19:06PM +0100, David Hildenbrand wrote:
> > On 12.03.25 01:06, Nico Pache wrote:
> > > Add NR_BALLOON_PAGES counter to track memory used by balloon drivers and
> > > expose it through /proc/meminfo and other memory reporting interfaces.
> >
> > In balloon_page_enqueue_one(), we perform a
> >
> > __count_vm_event(BALLOON_INFLATE)
> >
> > and in balloon_page_list_dequeue
> >
> > __count_vm_event(BALLOON_DEFLATE);
> >
> >
> > Should we maybe simply do the per-node accounting similarly there?
>
>
> BTW should virtio mem be tied into this too, in some way? or is it too
> different?

No, we should limit it to actual balloon drivers that e.g., never 
completely remove memory.

--
Cheers,

David / dhildenb