> From: Scott Mitchell [mailto:[email protected]]
> Sent: Sunday, 11 January 2026 07.22
>
> > Does this still happen after you replaced the RTE_PTR_ADD() with
> native pointer arithmetic in the checksum function?
> > In other words: Is this workaround still necessary?
>
> Yes unfortunately it is necessary with the pointer access.
> I updated the reproducer which shows this case:
> https://gist.github.com/Scottmitch/bf23748b4588e68c9bdb8d124f92f1bd
I wonder if some of the magic types in rte_memcpy() [1] could be used to fix
the aliasing/eliding problem in the checksum function:
struct __rte_packed_begin rte_unaligned_uint16_alias {
unaligned_uint16_t val;
} __rte_packed_end __rte_may_alias;
[1]:
https://elixir.bootlin.com/dpdk/v25.11/source/lib/eal/x86/include/rte_memcpy.h#L66
