On Wed, Jul 17, 2019 at 01:30:27PM +0200, Stefano Garzarella wrote:
> In order to reduce the number of credit update messages,
> we send them only when the space available seen by the
> transmitter is less than VIRTIO_VSOCK_MAX_PKT_BUF_SIZE.
> 
> Signed-off-by: Stefano Garzarella <sgarzare@redhat.com>
> ---
>  include/linux/virtio_vsock.h            |  1 +
>  net/vmw_vsock/virtio_transport_common.c | 16 +++++++++++++---
>  2 files changed, 14 insertions(+), 3 deletions(-)

It's an arbitrary limit but the risk of regressions is low since the
credit update traffic was so excessive:

Reviewed-by: Stefan Hajnoczi <stefanha@redhat.com>