From: Dâniel Fraga <fragabr@xxxxxxxxx> Date: Fri, 22 Aug 2008 18:32:24 -0300 > On Wed, 20 Aug 2008 15:37:13 +0300 (EEST) > "Ilpo Järvinen" <ilpo.jarvinen@xxxxxxxxxxx> wrote: > > > Based on irc discussion with davem, there is a htb bug which can cause > > corruption of the retransmitted TCP packets (and then a discard due to > > checksum mismatch). That would also explain the strange headers I noticed > > earlier. There's a patch below (should apply to 2.6.26), please put it at > > least on the host(s) which use htb (I don't know if both server and the > > client do use wondershaper script or just the client). An different > > failure symptoms (one could be somehow frto related as FRTO is used while > > retransmitting) are also quite well explainable. > > > > But FRTO is mostly not a suspect based on the tcpdump you provided (no > > FRTO workaround would help in that). > > Ilpo, I have good news. I decided to disable completely HTB and > the problem seems to have gone. And frto is enabled, of course. So the > problem was with HTB, not frto as I thought. > > The HTB patches you provided are going to be included in the > next 2.6.27 kernel, right? Yes, but it's important that you verify that the patch makes the problem go away when HTB is enabled. Please make this test if you can. -- 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
