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

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Message-ID: <20250313032001-mutt-send-email-mst@kernel.org>
Date: Thu, 13 Mar 2025 03:20:37 -0400
From: "Michael S. Tsirkin" <mst@...hat.com>
To: David Hildenbrand <david@...hat.com>
Cc: Nico Pache <npache@...hat.com>, linux-hyperv@...r.kernel.org,
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Subject: Re: [RFC 1/5] meminfo: add a per node counter for balloon drivers

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?

> -- 
> Cheers,
> 
> David / dhildenb