While AioContext is in polling mode virtqueue notifications are not necessary. Some device virtqueue handlers enable notifications. Make sure they stay disabled to avoid unnecessary vmexits.
Signed-off-by: Stefan Hajnoczi <stefa...@redhat.com> --- hw/virtio/virtio.c | 3 +++ 1 file changed, 3 insertions(+) diff --git a/hw/virtio/virtio.c b/hw/virtio/virtio.c index f04ab7a..34065c7 100644 --- a/hw/virtio/virtio.c +++ b/hw/virtio/virtio.c @@ -2126,6 +2126,9 @@ static bool virtio_queue_host_notifier_aio_poll(void *opaque) } virtio_queue_notify_aio_vq(vq); + + /* In case the handler function re-enabled notifications */ + virtio_queue_set_notification(vq, 0); return true; } -- 2.9.3