netdev - Re: UDP multicast packet loss not reported if TX ring overrun?

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Message-ID: <alpine.DEB.1.10.0908172024380.29958@gentwo.org>
Date:	Mon, 17 Aug 2009 20:25:03 -0400 (EDT)
From:	Christoph Lameter <cl@...ux-foundation.org>
To:	Sridhar Samudrala <sri@...ibm.com>
cc:	Nivedita Singhvi <niv@...ibm.com>, netdev@...r.kernel.org,
	Eric Dumazet <dada1@...mosbay.com>
Subject: Re: UDP multicast packet loss not reported if TX ring overrun?

On Mon, 17 Aug 2009, Sridhar Samudrala wrote:

> The first 3 are rx stats and the last one is a tx stat.
> Anyway, only the first field(total packets received) seems to be non-zero
> in your softnet_stat output on both sender and receiver.
> So it is possible that there is some other place in the stack where the packets
> are gettting dropped but not counted.

Is the driver responsible? I noticed no rx_drop++ in there.

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