Björn Töpel <bjorn.topel@xxxxxxxxx> writes:
> This two-patch series introduces load-acquire/store-release barriers
> for the AF_XDP rings.
>
> For most contemporary architectures, this is more effective than a
> SPSC ring based on smp_{r,w,}mb() barriers. More importantly,
> load-acquire/store-release semantics make the ring code easier to
> follow.
>
> This is effectively the change done in commit 6c43c091bdc5
> ("documentation: Update circular buffer for
> load-acquire/store-release"), but for the AF_XDP rings.
>
> Both libbpf and the kernel-side are updated.
>
> Full details are outlined in the commits!
>
> Thanks to the LKMM-folks (Paul/Alan/Will) for helping me out in this
> complicated matter!
>
> @Andrii I kept the barriers in libbpf_util.h to separate userfacing
> APIs (xsk.h) from internals.
>
> @Toke I kept "barriers" but reworded. Acquire/release are also
> barriers.
Right, that text is better - thanks!
Acked-by: Toke Høiland-Jørgensen <toke@xxxxxxxxxx>
