diff options
Diffstat (limited to 'pkgs/patches-linux-5.15/700-mvneta-tx-queue-workaround.patch')
| -rw-r--r-- | pkgs/patches-linux-5.15/700-mvneta-tx-queue-workaround.patch | 38 |
1 files changed, 38 insertions, 0 deletions
diff --git a/pkgs/patches-linux-5.15/700-mvneta-tx-queue-workaround.patch b/pkgs/patches-linux-5.15/700-mvneta-tx-queue-workaround.patch new file mode 100644 index 0000000..6c07a29 --- /dev/null +++ b/pkgs/patches-linux-5.15/700-mvneta-tx-queue-workaround.patch @@ -0,0 +1,38 @@ +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 +@@ -4987,6 +4987,16 @@ static int mvneta_setup_tc(struct net_de + } + } + ++#ifndef CONFIG_ARM64 ++static u16 mvneta_select_queue(struct net_device *dev, struct sk_buff *skb, ++ struct net_device *sb_dev) ++{ ++ /* XXX: hardware queue scheduling is broken, ++ * use only one queue until it is fixed */ ++ return 0; ++} ++#endif ++ + static const struct net_device_ops mvneta_netdev_ops = { + .ndo_open = mvneta_open, + .ndo_stop = mvneta_stop, +@@ -4997,6 +5007,9 @@ static const struct net_device_ops mvnet + .ndo_fix_features = mvneta_fix_features, + .ndo_get_stats64 = mvneta_get_stats64, + .ndo_eth_ioctl = mvneta_ioctl, ++#ifndef CONFIG_ARM64 ++ .ndo_select_queue = mvneta_select_queue, ++#endif + .ndo_bpf = mvneta_xdp, + .ndo_xdp_xmit = mvneta_xdp_xmit, + .ndo_setup_tc = mvneta_setup_tc, |