[linux-next] LinuxNextTracking branch, master, updated. next-20180921

batman at open-mesh.org batman at open-mesh.org
Sat Sep 22 00:23:31 CEST 2018

The following commit has been merged in the master branch:
commit a7ea49afcc888dd5aac76774767bfb90be937aad
Author: Sven Eckelmann <sven at narfation.org>
Date:   Tue Sep 11 17:22:01 2018 +0200

    batman-adv: Enable LockLess TX for softif
    The batadv interfaces are virtual interfaces which just tunnel the traffic
    over other ethernet compatible interfaces. It doesn't need serialization
    during the tx phase and is using RCU for most of its internal
    datastructures. Since it doesn't have actual queues which could be locked
    independently, the throughput gets significantly reduced by the extra lock
    in the core net code.
    8 parallel TCP connections forwarded by an IPQ4019 based hardware over
    5GHz could reach:
    * without LLTX: 349 Mibit/s
    * with LLTX:    563 Mibit/s
    Signed-off-by: Sven Eckelmann <sven at narfation.org>
    Signed-off-by: Simon Wunderlich <sw at simonwunderlich.de>

diff --git a/net/batman-adv/soft-interface.c b/net/batman-adv/soft-interface.c
index e121c59fc1fa..2c7d95727f90 100644
--- a/net/batman-adv/soft-interface.c
+++ b/net/batman-adv/soft-interface.c
@@ -1050,6 +1050,7 @@ static void batadv_softif_init_early(struct net_device *dev)
 	dev->needs_free_netdev = true;
 	dev->priv_destructor = batadv_softif_free;
+	dev->features |= NETIF_F_LLTX;
 	dev->priv_flags |= IFF_NO_QUEUE;
 	/* can't call min_mtu, because the needed variables


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