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

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Message-ID: <c4229ea5-d991-4f5e-a0ff-45dce78a242a@redhat.com>
Date: Wed, 12 Mar 2025 23:19:06 +0100
From: David Hildenbrand <david@...hat.com>
To: Nico Pache <npache@...hat.com>, linux-hyperv@...r.kernel.org,
 linux-kernel@...r.kernel.org, virtualization@...ts.linux.dev,
 xen-devel@...ts.xenproject.org, linux-fsdevel@...r.kernel.org,
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Subject: Re: [RFC 1/5] meminfo: add a per node counter for balloon drivers

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?

-- 
Cheers,

David / dhildenb