Hi Hoang,
I have a hard time to understand this change. Can you please explain it a 
little better?
See more comments below.

BR
///jon


> -----Original Message-----
> From: Hoang Le <[email protected]>
> Sent: 6-Nov-19 00:03
> To: [email protected]; Jon Maloy 
> <[email protected]>; [email protected]
> Subject: [net-next] tipc: eliminate checking netns if node acknowledge
> 
> At current we do check netns local for every neighbor discovery that
> is being sent from external netns node. This is become unnecessary
> for node acknowledge.
> 
> We now improve above checking for peer node come back and discovery
> message sent from unacknowledge node.
> 
> Fixes: f73b12812a3d ("tipc: improve throughput between nodes in netns")
> Signed-off-by: Hoang Le <[email protected]>
> ---
>  net/tipc/node.c | 16 +++++++---------
>  1 file changed, 7 insertions(+), 9 deletions(-)
> 
> diff --git a/net/tipc/node.c b/net/tipc/node.c
> index 4b60928049ea..742c04756d72 100644
> --- a/net/tipc/node.c
> +++ b/net/tipc/node.c
> @@ -472,10 +472,8 @@ static struct tipc_node *tipc_node_create(struct net 
> *net, u32 addr,
>                                tipc_bc_sndlink(net),
>                                &n->bc_entry.link)) {
>               pr_warn("Broadcast rcv link creation failed, no memory\n");
> -             if (n->peer_net) {
> -                     n->peer_net = NULL;
> -                     n->peer_hash_mix = 0;
> -             }
> +             n->peer_net = NULL;
> +             n->peer_hash_mix = 0;

This looks pretty unnecessary if the node object anyway is freed on the next 
code line.

>               kfree(n);
>               n = NULL;
>               goto exit;
> @@ -1068,6 +1066,9 @@ void tipc_node_check_dest(struct net *net, u32 addr,
>       if (sign_match && addr_match && link_up) {
>               /* All is fine. Do nothing. */
>               reset = false;
> +             /* Peer node is not a container/netns local */
> +             if (!n->peer_hash_mix)
> +                     n->peer_hash_mix = hash_mixes;

I don't understand why you are doing this. 
If we already have established that the node is non-local, and it is still up 
and everything matches, why do we need to set this?

Regards
///jon

>       } else if (sign_match && addr_match && !link_up) {
>               /* Respond. The link will come up in due time */
>               *respond = true;
> @@ -1393,11 +1394,8 @@ static void node_lost_contact(struct tipc_node *n,
> 
>       /* Notify publications from this node */
>       n->action_flags |= TIPC_NOTIFY_NODE_DOWN;
> -
> -     if (n->peer_net) {
> -             n->peer_net = NULL;
> -             n->peer_hash_mix = 0;
> -     }
> +     n->peer_net = NULL;
> +     n->peer_hash_mix = 0;
>       /* Notify sockets connected to node */
>       list_for_each_entry_safe(conn, safe, conns, list) {
>               skb = tipc_msg_create(TIPC_CRITICAL_IMPORTANCE, TIPC_CONN_MSG,
> --
> 2.20.1


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