Moi Ilpo, On Thursday, 17. July 2008 17:53:01 Ilpo Järvinen wrote: > > > One option would be to disable reentry to FRTO when some progress was > > > made... Please try with the patch below... > > Ah, I just forgot that the situation might persist... Try with this > one instead... Good news everyone: Two connections made it to the finish line. The bad part: One transfer took four minutes, the other sixteen minutes. A colleague commented it's still much faster than carrying the message by plane ;-) A session without FRTO takes around 84 seconds. I've added debug printks() to every return path in tcp_use_frto(), so you can see what's going on. They look like this: Jul 18 10:20:40 intratest131 kernel: [ 957.318006] tcp_use_frto: ENTER: frto_counter: 0, icsk->icsk_ca_state: 0 Jul 18 10:20:40 intratest131 kernel: [ 957.318011] tcp_use_frto: DEFAULT RETURN 1; Jul 18 10:21:08 intratest131 kernel: [ 984.446006] tcp_use_frto: ENTER: frto_counter: 3, icsk->icsk_ca_state: 0 Jul 18 10:21:08 intratest131 kernel: [ 984.446011] tcp_use_frto: RETURN in "tp->frto_counter > 1 || icsk->icsk_ca_state == TCP_CA_Loss" Jul 18 10:21:14 intratest131 kernel: [ 991.058006] tcp_use_frto: ENTER: frto_counter: 0, icsk->icsk_ca_state: 0 Jul 18 10:21:14 intratest131 kernel: [ 991.058011] tcp_use_frto: DEFAULT RETURN 1; Here are two new dumps and the corresponding debug traces: http://www.intra2net.com/de/download/tcpdump/tcp_frto_second_patch.tar.bz2 Enjoy, Thomas -- To unsubscribe from this list: send the line "unsubscribe netfilter-devel" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
