diff options
Diffstat (limited to 'target/linux/mvebu/patches-4.4/400-mvneta-tx-queue-workaround.patch')
| -rw-r--r-- | target/linux/mvebu/patches-4.4/400-mvneta-tx-queue-workaround.patch | 36 |
1 files changed, 36 insertions, 0 deletions
diff --git a/target/linux/mvebu/patches-4.4/400-mvneta-tx-queue-workaround.patch b/target/linux/mvebu/patches-4.4/400-mvneta-tx-queue-workaround.patch new file mode 100644 index 0000000000..5dba311d93 --- /dev/null +++ b/target/linux/mvebu/patches-4.4/400-mvneta-tx-queue-workaround.patch @@ -0,0 +1,36 @@ +The hardware queue scheduling is apparently configured with fixed +priorities, which creates a nasty fairness issue where traffic from one +CPU can starve traffic from all other CPUs. + +Work around this issue by forcing all tx packets to go through one CPU, +until this issue is fixed properly. + +Signed-off-by: Felix Fietkau <nbd@nbd.name> +--- +--- a/drivers/net/ethernet/marvell/mvneta.c ++++ b/drivers/net/ethernet/marvell/mvneta.c +@@ -3984,6 +3984,16 @@ static int mvneta_ethtool_set_eee(struct + return phylink_ethtool_set_eee(pp->phylink, eee); + } + ++static u16 mvneta_select_queue(struct net_device *dev, struct sk_buff *skb, ++ void *accel_priv, ++ select_queue_fallback_t fallback) ++{ ++ /* XXX: hardware queue scheduling is broken, ++ * use only one queue until it is fixed */ ++ return 0; ++} ++ ++ + static const struct net_device_ops mvneta_netdev_ops = { + .ndo_open = mvneta_open, + .ndo_stop = mvneta_stop, +@@ -3994,6 +4004,7 @@ static const struct net_device_ops mvnet + .ndo_fix_features = mvneta_fix_features, + .ndo_get_stats64 = mvneta_get_stats64, + .ndo_do_ioctl = mvneta_ioctl, ++ .ndo_select_queue = mvneta_select_queue, + }; + + const struct ethtool_ops mvneta_eth_tool_ops = { |