Commit 1448c133 authored by Stefan Hajnoczi's avatar Stefan Hajnoczi Committed by Michael S. Tsirkin
Browse files

virtio: disable notifications again after poll succeeded 



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: default avatarStefan Hajnoczi <stefanha@redhat.com>
Reviewed-by: default avatarMichael S. Tsirkin <mst@redhat.com>
Signed-off-by: default avatarMichael S. Tsirkin <mst@redhat.com>
Tested-by: default avatarRichard Henderson <rth@twiddle.net>
Tested-by: default avatarLaszlo Ersek <lersek@redhat.com>
Reviewed-by: default avatarMichael S. Tsirkin <mst@redhat.com>
Signed-off-by: default avatarMichael S. Tsirkin <mst@redhat.com>
parent 332fa82d

hw/virtio/virtio.c

+3 −0
Original line number Diff line number Diff line
@@ -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;

}