Re: txqueuelen has wrong units; should be time

Eric Dumazet
2011-02-28T16:48:24Z

Le lundi 28 février 2011 à 11:11 -0500, John W. Linville a écrit :
> On Sun, Feb 27, 2011 at 09:07:53PM +0100, Eric Dumazet wrote:
>
> > Qdisc should return to caller a good indication packet is queued or
> > dropped at enqueue() time... not later (aka : never)
> >
> > Accepting a packet at t0, and dropping it later at t0+limit without
> > giving any indication to caller is a problem.
>
> Can you elaborate on what problem this causes? Is it any worse than
> if the packet is dropped at some later hop?
>
> Is there any API that could report the drop to the sender (at
> least a local one) without having to wait for the ack timeout?
> Should there be?
>

Not all protocols have ACKS ;)

dev_queue_xmit() returns an error code, some callers use it.