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

On Wed, Mar 12, 2025 at 4:19 PM David Hildenbrand [off-list ref] wrote:

On 12.03.25 01:06, Nico Pache wrote:

quoted

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