From: Sven Eckelmann <sven@narfation.org>
To: netdev@vger.kernel.org
Cc: b.a.t.m.a.n@lists.open-mesh.org, linux-kernel@vger.kernel.org,
Sven Eckelmann <sven@narfation.org>
Subject: [PATCH 2/2] vxlan: Copy needed_tailroom from lowerdev
Date: Thu, 26 Nov 2020 13:52:47 +0100 [thread overview]
Message-ID: <20201126125247.1047977-2-sven@narfation.org> (raw)
In-Reply-To: <20201126125247.1047977-1-sven@narfation.org>
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@narfation.org>
---
drivers/net/vxlan.c | 2 ++
1 file changed, 2 insertions(+)
diff --git a/drivers/net/vxlan.c b/drivers/net/vxlan.c
index 25b5b5a2dfea..44bb02122526 100644
--- a/drivers/net/vxlan.c
+++ b/drivers/net/vxlan.c
@@ -3801,6 +3801,8 @@ 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)
--
2.29.2
next prev parent reply other threads:[~2020-11-26 12:53 UTC|newest]
Thread overview: 4+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-11-26 12:52 [PATCH 1/2] vxlan: Add needed_headroom for lower device Sven Eckelmann
2020-11-26 12:52 ` Sven Eckelmann [this message]
2020-11-26 18:19 ` Annika Wickert
2020-12-01 2:34 ` Jakub Kicinski
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