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

[Nico Pache]

On Wed, Mar 12, 2025 at 4:19 PM David Hildenbrand <david@xxxxxxxxxx> 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?

I think the issue is that some balloon drivers use the
balloon_compaction interface while others use their own.

This would require unifying all the drivers under a single api which
may be tricky if they all have different behavior
>
> --
> Cheers,
>
> David / dhildenb
>