diff options
Diffstat (limited to 'target/linux/generic/pending-5.10/691-net-add-sysfs-attribute-for-enabling-threaded-NAPI.patch')
| -rw-r--r-- | target/linux/generic/pending-5.10/691-net-add-sysfs-attribute-for-enabling-threaded-NAPI.patch | 74 |
1 files changed, 74 insertions, 0 deletions
diff --git a/target/linux/generic/pending-5.10/691-net-add-sysfs-attribute-for-enabling-threaded-NAPI.patch b/target/linux/generic/pending-5.10/691-net-add-sysfs-attribute-for-enabling-threaded-NAPI.patch new file mode 100644 index 0000000000..279ae2c25a --- /dev/null +++ b/target/linux/generic/pending-5.10/691-net-add-sysfs-attribute-for-enabling-threaded-NAPI.patch @@ -0,0 +1,74 @@ +From: Felix Fietkau <nbd@nbd.name> +Date: Fri, 21 Aug 2020 15:07:54 +0200 +Subject: [PATCH] net: add sysfs attribute for enabling threaded NAPI + +This can be used to enable threaded NAPI on drivers that did not explicitly +request it. + +Suggested-by: Eric Dumazet <eric.dumazet@gmail.com> +Signed-off-by: Felix Fietkau <nbd@nbd.name> +--- + +--- a/net/core/net-sysfs.c ++++ b/net/core/net-sysfs.c +@@ -472,6 +472,52 @@ static ssize_t proto_down_store(struct d + } + NETDEVICE_SHOW_RW(proto_down, fmt_dec); + ++static int change_napi_threaded(struct net_device *dev, unsigned long val) ++{ ++ struct napi_struct *napi; ++ ++ if (list_empty(&dev->napi_list)) ++ return -EOPNOTSUPP; ++ ++ list_for_each_entry(napi, &dev->napi_list, dev_list) { ++ if (val) ++ set_bit(NAPI_STATE_THREADED, &napi->state); ++ else ++ clear_bit(NAPI_STATE_THREADED, &napi->state); ++ } ++ ++ return 0; ++} ++ ++static ssize_t napi_threaded_store(struct device *dev, ++ struct device_attribute *attr, ++ const char *buf, size_t len) ++{ ++ return netdev_store(dev, attr, buf, len, change_napi_threaded); ++} ++ ++static ssize_t napi_threaded_show(struct device *dev, ++ struct device_attribute *attr, ++ char *buf) ++{ ++ struct net_device *netdev = to_net_dev(dev); ++ struct napi_struct *napi; ++ bool enabled = false; ++ ++ if (!rtnl_trylock()) ++ return restart_syscall(); ++ ++ list_for_each_entry(napi, &netdev->napi_list, dev_list) { ++ if (test_bit(NAPI_STATE_THREADED, &napi->state)) ++ enabled = true; ++ } ++ ++ rtnl_unlock(); ++ ++ return sprintf(buf, fmt_dec, enabled); ++} ++static DEVICE_ATTR_RW(napi_threaded); ++ + static ssize_t phys_port_id_show(struct device *dev, + struct device_attribute *attr, char *buf) + { +@@ -564,6 +610,7 @@ static struct attribute *net_class_attrs + &dev_attr_tx_queue_len.attr, + &dev_attr_gro_flush_timeout.attr, + &dev_attr_napi_defer_hard_irqs.attr, ++ &dev_attr_napi_threaded.attr, + &dev_attr_phys_port_id.attr, + &dev_attr_phys_port_name.attr, + &dev_attr_phys_switch_id.attr, |