From: Ido Schimmel <ido...@mellanox.com> Date: Thu, 22 Mar 2018 19:53:32 +0200
> Petr says: > > When offloading GRE tunnels, the MTU setting is kept fixed after the > initial offload even as the slow-path configuration changed. Worse: the > offloaded MTU setting is actually just a transient value set at the time > of NETDEV_REGISTER of the tunnel. As of commit ffc2b6ee4174 ("ip_gre: > fix IFLA_MTU ignored on NEWLINK"), that transient value is zero, and > unless there's e.g. a VRF migration that prompts re-offload, it stays at > zero, and all GRE packets end up trapping. > > Thus, in patch #1, change the way the MTU is changed post-registration, > so that the full event protocol is observed. That way the drivers get to > see the change and have a chance to react. > > In the remaining two patches, implement support for MTU change in mlxsw > driver. Series applied, thanks.