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packet life

When receiving a packet, after the NET_RX_SOFTIRQ posted the skb to 
softnet_data, what happened? In case of IPv4, I think the skb should 
travel all the way up to a struct sock, then waiting there for a 
syscall, right?

But I can't track the path down. I can't make the path in the 
syscall context connected to the interrupt context. Someone please 
help me understand this! Thank you very much!

Yours,
zw

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