Hi,
I am newbie in the latest kernel development. Nowadays I am starting to work in
linux kernel. BTW, I find kernel code that I can't understand.
in bellow.
netif_rx() in 2.4.19
1238 dev_hold(skb->dev);
1239 __skb_queue_tail(&queue->input_pkt_queue,skb);
1240 /* Runs from irqs or BH's, no need to wake BH */
1241 cpu_raise_softirq(this_cpu, NET_RX_SOFTIRQ);
1242 local_irq_restore(flags);
netif_rx() in 2.4.20
1254 dev_hold(skb->dev);
1255 __skb_queue_tail(&queue->input_pkt_queue,skb);
1256 local_irq_restore(flags);
why 2.4.20's netif_rx() don't call raise_softirq()? Is there never call
net_rx_action()?
maybe, IMHO, because NAPI. but I want to know exactly. I don't know reason why
should
you that. I could not find reason in google or netdev mailling list.
sorry for my stupid question. Any help is highly appriciated.
Thanks,
Lee
|