diff options
Diffstat (limited to 'target/linux/mvebu/patches-4.9/300-mvneta-tx-queue-workaround.patch')
| -rw-r--r-- | target/linux/mvebu/patches-4.9/300-mvneta-tx-queue-workaround.patch | 36 |
1 files changed, 36 insertions, 0 deletions
diff --git a/target/linux/mvebu/patches-4.9/300-mvneta-tx-queue-workaround.patch b/target/linux/mvebu/patches-4.9/300-mvneta-tx-queue-workaround.patch new file mode 100644 index 0000000..4801c4a --- /dev/null +++ b/target/linux/mvebu/patches-4.9/300-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 +@@ -3835,6 +3835,16 @@ static int mvneta_ethtool_get_rxfh(struc + return 0; + } + ++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, +@@ -3845,6 +3855,7 @@ 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 = { |