Re: [RFC PATCH 2/2] virtio-balloon: add stats push mode

[Gregory Price <gourry@gourry.net>]

On Tue, Jun 16, 2026 at 05:52:29PM +0200, David Hildenbrand (Arm) wrote:
> On 6/16/26 16:44, Gregory Price wrote:
> > That makes sense, although don't you just push the blocking operation
> > into yet another thread on the host?
> 
> I think timers are run from the QEMU main thread, so no separate thread just for
> the timer.
> 
> And IIRC, there will be no blocking. At least if I understand your concern
> correctly.
> 
> balloon_stats_poll_cb() will do a virtqueue_push()+virtio_notify(), which will
> notify the device. The main thread will continue afterwards doing what a main
> thread usually does.
> 
> A VCPU will process the request in the VM and send it back + notify the device.
>

Entirely possible I just bungled the interaction then and/or CH's
interfaces introduce a blocking op that shouldn't.

Thanks for the feedback, we can probably drop this patch.  Unless
there's any particular pushback for 1/2, should i leave as-is or
resubmit separately w/o RFC?

~Gregory