Signed-off-by: Phil Sutter <[email protected]>
---
net/Kconfig | 12 ++++++++++++
net/ethernet/eth.c | 2 +-
2 files changed, 13 insertions(+), 1 deletion(-)
diff --git a/net/Kconfig b/net/Kconfig
index 7021c1b..21c164f 100644
--- a/net/Kconfig
+++ b/net/Kconfig
@@ -48,6 +48,18 @@ config COMPAT_NETLINK_MESSAGES
config NET_INGRESS
bool
+config DEFAULT_TX_QUEUE_LEN
+ prompt "Default TX queue length (in packets)" if EXPERT
+ int
+ default 1000 # Ethernet wants good queues
+ help
+ Set the default value of tx_queue_len for newly created network
+ interfaces. It is used by queueing disciplines to determine how many
+ packets to keep in backlog before starting to drop new ones.
+
+ The default value of 1000 packets is there for a very long time and
+ in combination with GSO way too big.
+
menu "Networking options"
source "net/packet/Kconfig"
diff --git a/net/ethernet/eth.c b/net/ethernet/eth.c
index 77e0f0e..b778586 100644
--- a/net/ethernet/eth.c
+++ b/net/ethernet/eth.c
@@ -355,7 +355,7 @@ void ether_setup(struct net_device *dev)
dev->hard_header_len = ETH_HLEN;
dev->mtu = ETH_DATA_LEN;
dev->addr_len = ETH_ALEN;
- dev->tx_queue_len = 1000; /* Ethernet wants good queues */
+ dev->tx_queue_len = CONFIG_DEFAULT_TX_QUEUE_LEN;
dev->flags = IFF_BROADCAST|IFF_MULTICAST;
dev->priv_flags |= IFF_TX_SKB_SHARING;
--
2.1.2
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