| b.liu | e958203 | 2025-04-17 19:18:16 +0800 | [diff] [blame] | 1 | The hardware queue scheduling is apparently configured with fixed |
| 2 | priorities, which creates a nasty fairness issue where traffic from one |
| 3 | CPU can starve traffic from all other CPUs. |
| 4 | |
| 5 | Work around this issue by forcing all tx packets to go through one CPU, |
| 6 | until this issue is fixed properly. |
| 7 | |
| 8 | Signed-off-by: Felix Fietkau <nbd@nbd.name> |
| 9 | --- |
| 10 | --- a/drivers/net/ethernet/marvell/mvneta.c |
| 11 | +++ b/drivers/net/ethernet/marvell/mvneta.c |
| 12 | @@ -4691,6 +4691,16 @@ static int mvneta_ethtool_set_eee(struct |
| 13 | return phylink_ethtool_set_eee(pp->phylink, eee); |
| 14 | } |
| 15 | |
| 16 | +#ifndef CONFIG_ARM64 |
| 17 | +static u16 mvneta_select_queue(struct net_device *dev, struct sk_buff *skb, |
| 18 | + struct net_device *sb_dev) |
| 19 | +{ |
| 20 | + /* XXX: hardware queue scheduling is broken, |
| 21 | + * use only one queue until it is fixed */ |
| 22 | + return 0; |
| 23 | +} |
| 24 | +#endif |
| 25 | + |
| 26 | static const struct net_device_ops mvneta_netdev_ops = { |
| 27 | .ndo_open = mvneta_open, |
| 28 | .ndo_stop = mvneta_stop, |
| 29 | @@ -4701,6 +4711,9 @@ static const struct net_device_ops mvnet |
| 30 | .ndo_fix_features = mvneta_fix_features, |
| 31 | .ndo_get_stats64 = mvneta_get_stats64, |
| 32 | .ndo_do_ioctl = mvneta_ioctl, |
| 33 | +#ifndef CONFIG_ARM64 |
| 34 | + .ndo_select_queue = mvneta_select_queue, |
| 35 | +#endif |
| 36 | .ndo_bpf = mvneta_xdp, |
| 37 | .ndo_xdp_xmit = mvneta_xdp_xmit, |
| 38 | }; |