On Mon, Apr 04, 2016 at 01:45:02PM -0700, Cong Wang wrote: > I see your point, but calling __ip6_datagram_connect() seems overkill > here, we don't need to update so many things in the pmtu update context, > at least IPv4 doesn't do that either. I don't think you have to do that. > > So why just updating the dst cache (also some addr cache) here is not > enough? I am not sure I understand. I could be missing something.
This patch uses ip6_datagram_dst_update() to do the route lookup and sk->sk_dst_cache update. ip6_datagram_dst_update() is created in the first two refactoring patches and is also used by __ip6_datagram_connect(). Which operations in ip6_datagram_dst_update() could be saved during the pmtu update?
