From: Vladislav Yasevich <vyasev...@gmail.com> Date: Thu, 11 May 2017 11:09:52 -0400
> Macvlan always turns on offload features that have sofware > fallback (NETIF_GSO_SOFTWARE). This allows much higher guest-guest > communications over macvtap. > > However, macvtap does not turn on these features for vlan tagged traffic. > As a result, depending on the HW that mactap is configured on, the > performance of guest-guest communication over a vlan is very > inconsistent. If the HW supports TSO/UFO over vlans, then the > performance will be fine. If not, the the performance will suffer > greatly since the VM may continue using TSO/UFO, and will force the host > segment the traffic and possibly overlow the macvtap queue. > > This patch adds the always on offloads to vlan_features. This > makes sure that any vlan tagged traffic between 2 guest will not > be segmented needlessly. > > Signed-off-by: Vladislav Yasevich <vyase...@redhat.com> Indeed, this makes us more consistent with how we handle non-vlan features in macvtap. Applied, thanks.
