On Fri, 2018-01-12 at 13:01 -0800, Saeed Mahameed wrote:> which is better to grasp ?:> > update_doorbell() {> dma_wmb();> ring->db = prod;> }This one is IMO the most secure one (least surprise)Considering the time it took to discover this bug, I would really playsafe.But obviously I do not maintain mlx4.