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| author | John Fastabend <john.r.fastabend@intel.com> | 2015-03-18 14:57:33 +0200 |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2015-03-18 14:55:18 -0400 |
| commit | 822b3b2ebfff8e9b3d006086c527738a7ca00cd0 (patch) | |
| tree | d3e6b25328bf4716982026b04dee8c0d2718a5d5 /include/linux/netdevice.h | |
| parent | b65885d29d41c7245bbd98769e781f77e8d9ed5b (diff) | |
| download | lwn-822b3b2ebfff8e9b3d006086c527738a7ca00cd0.tar.gz lwn-822b3b2ebfff8e9b3d006086c527738a7ca00cd0.zip | |
net: Add max rate tx queue attribute
This adds a tx_maxrate attribute to the tx queue sysfs entry allowing
for max-rate limiting. Along with DCB-ETS and BQL this provides another
knob to tune queue performance. The limit units are Mbps.
By default it is disabled. To disable the rate limitation after it
has been set for a queue, it should be set to zero.
Signed-off-by: John Fastabend <john.r.fastabend@intel.com>
Signed-off-by: Or Gerlitz <ogerlitz@mellanox.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'include/linux/netdevice.h')
| -rw-r--r-- | include/linux/netdevice.h | 8 |
1 files changed, 8 insertions, 0 deletions
diff --git a/include/linux/netdevice.h b/include/linux/netdevice.h index dd1d069758be..76c5de4978a8 100644 --- a/include/linux/netdevice.h +++ b/include/linux/netdevice.h @@ -587,6 +587,7 @@ struct netdev_queue { #ifdef CONFIG_BQL struct dql dql; #endif + unsigned long tx_maxrate; } ____cacheline_aligned_in_smp; static inline int netdev_queue_numa_node_read(const struct netdev_queue *q) @@ -1022,6 +1023,10 @@ typedef u16 (*select_queue_fallback_t)(struct net_device *dev, * be otherwise expressed by feature flags. The check is called with * the set of features that the stack has calculated and it returns * those the driver believes to be appropriate. + * int (*ndo_set_tx_maxrate)(struct net_device *dev, + * int queue_index, u32 maxrate); + * Called when a user wants to set a max-rate limitation of specific + * TX queue. */ struct net_device_ops { int (*ndo_init)(struct net_device *dev); @@ -1178,6 +1183,9 @@ struct net_device_ops { netdev_features_t (*ndo_features_check) (struct sk_buff *skb, struct net_device *dev, netdev_features_t features); + int (*ndo_set_tx_maxrate)(struct net_device *dev, + int queue_index, + u32 maxrate); }; /** |