Re: IPv6 address insertion order (was Re: [PATCH net v2] Revert "ipv6: preserve insertion order for same-scope addresses")

On Thu, 4 Jun 2026 21:39:09 +0300 Ido Schimmel wrote:

Given the above, my preference would be #3 -> #2 -> #1. The first two
options expose the same capability to user space, so #1 doesn't buy us
anything over #2, except a bit less code, but we risk introducing a
regression.

Between #2 and #3, production software can't drop the fallback even if
we implement #2, yet #2 requires us to maintain uAPI forever. I think we
should accept that the divergence between IPv4 and IPv6 is not ideal,
but at least it's predictable and dependable (Fernando is working on a
ksft and documentation).

+1 to this, FWIW