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SubjectRe: netif_wake_queue() question
Date
Hello!

> If you call netif_wake_queue() within the hard_start_xmit() handler and
> if you have another skb queued then your hard_start_xmit() handler will
> be called again really soon by the softirq stuff (at the exit from the
> next irq, syscall or exception handler), often before the current packet
> has been sent. Your driver may well choke on this. Also correct?

Not correct. If driver has no room to queue next packet,
it does not wake itself, certainly.

> and many others.

All the drivers do this. It is not related to softnet, drivers always
worked in this way. Only without softnet, if was statement "dev->tbusy=0".
The rest is well explained in Jaml's paper.

Alexey

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