completion_queue: List of skbuffs that were tried to be freed in IRQ
context. skbuff's cannot be safely freed in IRQ context.
they are queued here and later freed from net_tx_action,
at safe time. Ref: dev_kfree_skb_any
output_queue: List of all devices that need to transmit at least one
packet. Ref: netif_schedule
net_rx_action/net_tx_action are called whenever their corresponding
softirq handlers run. These softirqs are scheduled everytime a packet is
received on a CPU or is to be sent out from a CPU. If scheduled by
netif_rx_schedule/netif_schedule these are called when the next interrupt
handler runs.
tomar
On Tue, 19 Aug 2003, Adam Flizikowski wrote:
> Hello,
>
> while analysing networking code i found softnet_data[].completion_queue
> and
> softnet_data[].output_queue variables.
>
> Could someone please explain what are they for?
>
> Another question is: when are net_rx_action net_tx_action called?
>
> thanks in advance
>
> regards
>
> adam
>
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