Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1753136AbYGXJGV (ORCPT ); Thu, 24 Jul 2008 05:06:21 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1751307AbYGXJGG (ORCPT ); Thu, 24 Jul 2008 05:06:06 -0400 Received: from rhun.apana.org.au ([64.62.148.172]:60488 "EHLO arnor.apana.org.au" rhost-flags-OK-OK-OK-FAIL) by vger.kernel.org with ESMTP id S1751302AbYGXJGF (ORCPT ); Thu, 24 Jul 2008 05:06:05 -0400 From: Herbert Xu To: mingo@elte.hu (Ingo Molnar) Subject: Re: [TCP bug, regression] stuck distcc connections in latest -git Cc: w@1wt.eu, davem@davemloft.net, davidn@davidnewall.com, torvalds@linux-foundation.org, akpm@linux-foundation.org, netdev@vger.kernel.org, linux-kernel@vger.kernel.org, stefanr@s5r6.in-berlin.de, rjw@sisk.pl, ilpo.jarvinen@helsinki.fi Organization: Core In-Reply-To: <20080724060448.GA10203@elte.hu> X-Newsgroups: apana.lists.os.linux.kernel,apana.lists.os.linux.netdev User-Agent: tin/1.7.4-20040225 ("Benbecula") (UNIX) (Linux/2.6.17-rc4 (i686)) Message-Id: Date: Thu, 24 Jul 2008 17:05:19 +0800 Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 1711 Lines: 32 Ingo Molnar wrote: > > the client (running 2.6.24) does periodic 120 seconds retransmits: > > 07:40:48.255452 IP dione.39201 > phoenix.distcc: . 1608:2144(536) ack 1 win 584007:40:48.255547 IP phoenix.distcc > dione.39201: . ack 2144 win 65535 > 07:40:48.255564 IP dione.39201 > phoenix.distcc: . 67143:67679(536) ack 1 win 5840 > 07:40:48.255648 IP phoenix.distcc > dione.39201: . ack 2144 win 65535 > 07:42:48.255440 IP dione.39201 > phoenix.distcc: . 2144:2680(536) ack 1 win 5840 > 07:42:48.255559 IP phoenix.distcc > dione.39201: . ack 2680 win 65535 > 07:42:48.255570 IP dione.39201 > phoenix.distcc: . 67679:68215(536) ack 1 win 5840 > 07:42:48.255659 IP phoenix.distcc > dione.39201: . ack 2680 win 65535 > 07:44:48.255436 IP dione.39201 > phoenix.distcc: . 2680:3216(536) ack 1 win 584007:44:48.255570 IP phoenix.distcc > dione.39201: . ack 3216 win 65535 > 07:44:48.255585 IP dione.39201 > phoenix.distcc: . 68215:68751(536) ack 1 win 5840 > 07:44:48.255669 IP phoenix.distcc > dione.39201: . ack 3216 win 65535 OK, something's seriously screwed up on dione's kernel. Could you please disable syncookies (which should enable SACK for you) and see if the problem goes away? I think our Reno code may have been broken. Cheers, -- Visit Openswan at http://www.openswan.org/ Email: Herbert Xu ~{PmV>HI~} Home Page: http://gondor.apana.org.au/~herbert/ PGP Key: http://gondor.apana.org.au/~herbert/pubkey.txt -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/