On Thu, Dec 30, 2021 at 04:39:01PM -0500, Tom Talpey wrote: > Because RXE is a software provider, I believe the most natural approach > here is to use an atomic64_set(dst, *src). A smp_store_release() is most likely sufficient. The spec word 'atomic' is pretty confusing. What it is asking for, in the modern memory model vernacular, is 'write once' for the entire payload and 'release' to only be observable after other stores made by the same QP. 'release' semantics will depend on the CPU complex having a release dependency chain throughout all CPUs that completed any prior response on the QP. It looks like this is achieved through tasklet scheduling.. Jason
