Re: [PATCH v3 3/3] vhost: Improve vhost_get_avail_idx() with smp_rmb()

[Jason Wang]

On Thu, Mar 28, 2024 at 8:22 AM Gavin Shan <gshan@xxxxxxxxxx> wrote:
>
> All the callers of vhost_get_avail_idx() are concerned to the memory
> barrier, imposed by smp_rmb() to ensure the order of the available
> ring entry read and avail_idx read.
>
> Improve vhost_get_avail_idx() so that smp_rmb() is executed when
> the avail_idx is advanced. With it, the callers needn't to worry
> about the memory barrier.
>
> Suggested-by: Michael S. Tsirkin <mst@xxxxxxxxxx>
> Signed-off-by: Gavin Shan <gshan@xxxxxxxxxx>

Acked-by: Jason Wang <jasowang@xxxxxxxxxx>

Thanks