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 play safe. But obviously I do not maintain mlx4.