Re: outbound queue overflow

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The outgoing packets are dropped in the enqueue routine of the queing
discipline
if there is not enough space in the queue.

dev_queue_xmit calls q->enqueue which resolves to pfifo_fast_enqueue() when
the
default queuing discipline is used.  You can see the packet drop in this
routine.

Thanks
Sridhar




Sent by:  linux-net-owner@vger.kernel.org


To:   "linux-net@vger.kernel.org" <linux-net@vger.kernel.org>
cc:
Subject:  outbound queue overflow


I wonder where in the Linux networking code, we can see if outgoing
packets are
dropped due to lack of buffer space (full queue). In particular,
IP->ETH.
I looked e.g. at   dev_queue_xmit in net/core/dev.c
but could not find out if this is the right place to look at.

Hope anybody can give me a helping hint

Cheers,
Thiemo




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