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Date: Sat, 12 Dec 2020 11:08:24 -0500 From: Sasha Levin <sashal@...nel.org> To: linux-kernel@...r.kernel.org, stable@...r.kernel.org Cc: Sven Eckelmann <sven@...fation.org>, Jakub Kicinski <kuba@...nel.org>, Sasha Levin <sashal@...nel.org>, netdev@...r.kernel.org Subject: [PATCH AUTOSEL 5.4 07/14] vxlan: Copy needed_tailroom from lowerdev From: Sven Eckelmann <sven@...fation.org> [ Upstream commit a5e74021e84bb5eadf760aaf2c583304f02269be ] 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 <sven@...fation.org> Link: https://lore.kernel.org/r/20201126125247.1047977-2-sven@narfation.org Signed-off-by: Jakub Kicinski <kuba@...nel.org> Signed-off-by: Sasha Levin <sashal@...nel.org> --- drivers/net/vxlan.c | 2 ++ 1 file changed, 2 insertions(+) diff --git a/drivers/net/vxlan.c b/drivers/net/vxlan.c index 3753cf0942865..5502e145aa17b 100644 --- a/drivers/net/vxlan.c +++ b/drivers/net/vxlan.c @@ -3540,6 +3540,8 @@ 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) -- 2.27.0
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