From a5e74021e84bb5eadf760aaf2c583304f02269be Mon Sep 17 00:00:00 2001 From: Sven Eckelmann Date: Thu, 26 Nov 2020 13:52:47 +0100 Subject: [PATCH] vxlan: Copy needed_tailroom from lowerdev While vxlan doesn't need any extra tailroom, the lowerdev might need it. In that case, copy it over to reduce the chance for additional (re)allocations in the transmit path. Signed-off-by: Sven Eckelmann Link: https://lore.kernel.org/r/20201126125247.1047977-2-sven@narfation.org Signed-off-by: Jakub Kicinski --- drivers/net/vxlan.c | 2 ++ 1 file changed, 2 insertions(+) diff --git a/drivers/net/vxlan.c b/drivers/net/vxlan.c index 55fa3fbb80f1..032f78261913 100644 --- a/drivers/net/vxlan.c +++ b/drivers/net/vxlan.c @@ -3800,6 +3800,8 @@ static void vxlan_config_apply(struct net_device *dev, needed_headroom = lowerdev->hard_header_len; needed_headroom += lowerdev->needed_headroom; + dev->needed_tailroom = lowerdev->needed_tailroom; + max_mtu = lowerdev->mtu - (use_ipv6 ? VXLAN6_HEADROOM : VXLAN_HEADROOM); if (max_mtu < ETH_MIN_MTU) -- GitLab