Christoph Lameter a écrit :

On Tue, 25 Aug 2009, Eric Dumazet wrote:

quoted

Christoph Lameter a ?crit :

quoted

On Tue, 25 Aug 2009, Eric Dumazet wrote:

quoted

Please hold on, I would like to fully understand what's happening,
and test the patch :)

Ok. It would be good if the drops would also be somehow noted by the UDP
subsystem (one should see something with netstat -su) and may be even the
socket. I see a drops column in /proc/net/udp. rx_drops, tx_drops?

This /proc/net/udp column is for rx_drops currently and was recently added...

So lets rename it to rx_drops and then add tx_drops?

It wont be very nice, because it'll add yet another 32bits counter in each socket
structure, for a unlikely use. While rx_drops can happen if application is slow.

Also, tx_drops might be done later and not noticed.

Please read this old (and usefull) thread, with Alexey words...

http://oss.sgi.com/archives/netdev/2002-10/msg00612.html

http://oss.sgi.com/archives/netdev/2002-10/msg00617.html


So I bet your best choice is to set IP_RECVERR, as mentioned in 2002 by Jamal and Alexey :)