Re: Some -serious- BPF-related litmus tests

From: Peter Zijlstra
Date: Fri May 22 2020 - 05:44:47 EST


On Thu, May 21, 2020 at 05:38:50PM -0700, Paul E. McKenney wrote:
> Hello!
>
> Just wanted to call your attention to some pretty cool and pretty serious
> litmus tests that Andrii did as part of his BPF ring-buffer work:
>
> https://lore.kernel.org/bpf/20200517195727.279322-3-andriin@xxxxxx/
>
> Thoughts?

I find:

smp_wmb()
smp_store_release()

a _very_ weird construct. What is that supposed to even do?