tree c1f36fffb1f4aa33d20574a04a54e89c2a0cf602
parent 7d6240f0fb85430ae4f490824fdf8d0a078dfcd2
author Xin Long <lucien.xin@gmail.com> 1514184238 +0800
committer Greg Kroah-Hartman <gregkh@linuxfoundation.org> 1525852308 +0200

geneve: update skb dst pmtu on tx path

commit 52a589d51f1008f62569bf89e95b26221ee76690 upstream.

Commit a93bf0ff4490 ("vxlan: update skb dst pmtu on tx path") has fixed
a performance issue caused by the change of lower dev's mtu for vxlan.

The same thing needs to be done for geneve as well.

Note that geneve cannot adjust it's mtu according to lower dev's mtu
when creating it. The performance is very low later when netperfing
over it without fixing the mtu manually. This patch could also avoid
this issue.

Signed-off-by: Xin Long <lucien.xin@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Cc: Thomas Deutschmann <whissi@gentoo.org>
Cc: Eddie Chapman <eddie@ehuk.net>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>