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Date:	Fri, 11 Jul 2008 16:33:41 +0200
From:	Thomas Jarosch <thomas.jarosch@...ra2net.com>
To:	Jozsef Kadlecsik <kadlec@...ckhole.kfki.hu>
Cc:	netdev@...r.kernel.org, Patrick McHardy <kaber@...sh.net>,
	Sven Riedel <sr@...urenet.de>,
	Netfilter Developer Mailing List 
	<netfilter-devel@...r.kernel.org>
Subject: Re: TCP connection stalls under 2.6.24.7

On Thursday, 10. July 2008 23:21:37 Jozsef Kadlecsik wrote:
> You did not mention the type of your driver. Isn't there some changes in
> the driver code between 2.6.23.17 and 2.6.24 which could cause such
> stallings?

It's a 8139too and the "same" hardware works fine at other sites.
I tried the nmap trick mentioned by Dâniel Fraga with no noticable difference.

Here's another tcpdump created today, maybe it shows some new/different
information. This time I didn't capture the complete packets to keep it small:

15:43:30.580952 IP linux.52292 > mailserver.smtp: S 1353475948:1353475948(0) win 5808 <mss 1452,sackOK,timestamp 87884244[|tcp]>
15:43:30.646396 IP mailserver.smtp > linux.52292: S 3868230700:3868230700(0) ack 1353475949 win 65535 <mss 1448>
15:43:30.646421 IP linux.52292 > mailserver.smtp: . ack 1 win 5808
15:43:30.711442 IP mailserver.smtp > linux.52292: P 1:79(78) ack 1 win 65535
15:43:30.711457 IP linux.52292 > mailserver.smtp: . ack 79 win 5808
15:43:30.711525 IP linux.52292 > mailserver.smtp: P 1:26(25) ack 79 win 5808
15:43:30.781440 IP mailserver.smtp > linux.52292: P 79:246(167) ack 26 win 65535
15:43:30.781565 IP linux.52292 > mailserver.smtp: P 26:38(12) ack 246 win 6432
15:43:30.844482 IP mailserver.smtp > linux.52292: P 246:264(18) ack 38 win 65535
15:43:30.844551 IP linux.52292 > mailserver.smtp: P 38:68(30) ack 264 win 6432
15:43:30.908539 IP mailserver.smtp > linux.52292: P 264:282(18) ack 68 win 65535
15:43:30.908580 IP linux.52292 > mailserver.smtp: P 68:82(14) ack 282 win 6432
15:43:30.978507 IP mailserver.smtp > linux.52292: P 282:313(31) ack 82 win 65535
15:43:30.978647 IP linux.52292 > mailserver.smtp: P 82:224(142) ack 313 win 6432
15:43:31.056371 IP mailserver.smtp > linux.52292: P 313:542(229) ack 224 win 65535
15:43:31.056476 IP linux.52292 > mailserver.smtp: . 224:1672(1448) ack 542 win 7504
15:43:31.056510 IP linux.52292 > mailserver.smtp: . 1672:3120(1448) ack 542 win 7504
15:43:31.056541 IP linux.52292 > mailserver.smtp: P 3120:4320(1200) ack 542 win 7504
15:43:31.239389 IP mailserver.smtp > linux.52292: . ack 3120 win 65535
15:43:31.239425 IP linux.52292 > mailserver.smtp: . 4320:5768(1448) ack 542 win 7504
15:43:31.239461 IP linux.52292 > mailserver.smtp: . 5768:7216(1448) ack 542 win 7504
15:43:31.420453 IP mailserver.smtp > linux.52292: . ack 7216 win 65535
15:43:31.420481 IP linux.52292 > mailserver.smtp: . 7216:8664(1448) ack 542 win 7504
15:43:31.420513 IP linux.52292 > mailserver.smtp: . 8664:10112(1448) ack 542 win 7504
15:43:31.420542 IP linux.52292 > mailserver.smtp: . 10112:11560(1448) ack 542 win 7504
15:43:31.601274 IP mailserver.smtp > linux.52292: . ack 10112 win 65535
15:43:31.601300 IP linux.52292 > mailserver.smtp: . 11560:13008(1448) ack 542 win 7504
15:43:31.601331 IP linux.52292 > mailserver.smtp: . 13008:14456(1448) ack 542 win 7504
15:43:31.730384 IP mailserver.smtp > linux.52292: . ack 13008 win 65535
15:43:31.730423 IP linux.52292 > mailserver.smtp: . 14456:15904(1448) ack 542 win 7504
15:43:31.730457 IP linux.52292 > mailserver.smtp: . 15904:17352(1448) ack 542 win 7504
15:43:31.867331 IP mailserver.smtp > linux.52292: . ack 15904 win 65535
15:43:31.867348 IP linux.52292 > mailserver.smtp: . 17352:18800(1448) ack 542 win 7504
15:43:31.867378 IP linux.52292 > mailserver.smtp: . 18800:20248(1448) ack 542 win 7504
15:43:31.867407 IP linux.52292 > mailserver.smtp: P 20248:20704(456) ack 542 win 7504
15:43:32.012416 IP mailserver.smtp > linux.52292: . ack 18800 win 65535
15:43:32.012449 IP linux.52292 > mailserver.smtp: . 20704:22152(1448) ack 542 win 7504
15:43:32.012482 IP linux.52292 > mailserver.smtp: . 22152:23600(1448) ack 542 win 7504
15:43:32.079207 IP mailserver.smtp > linux.52292: . ack 20248 win 65535
15:43:32.079251 IP linux.52292 > mailserver.smtp: . 23600:25048(1448) ack 542 win 7504
15:43:32.224314 IP mailserver.smtp > linux.52292: . ack 23600 win 65535
15:43:32.224348 IP linux.52292 > mailserver.smtp: . 25048:26496(1448) ack 542 win 7504
15:43:32.224382 IP linux.52292 > mailserver.smtp: . 26496:27944(1448) ack 542 win 7504
15:43:32.224411 IP linux.52292 > mailserver.smtp: P 27944:28896(952) ack 542 win 7504
15:43:32.289328 IP mailserver.smtp > linux.52292: . ack 25048 win 65535
15:43:32.289348 IP linux.52292 > mailserver.smtp: . 28896:30344(1448) ack 542 win 7504
15:43:32.415220 IP mailserver.smtp > linux.52292: . ack 27944 win 65535
15:43:32.415242 IP linux.52292 > mailserver.smtp: . 30344:31792(1448) ack 542 win 7504
15:43:32.415284 IP linux.52292 > mailserver.smtp: . 31792:33240(1448) ack 542 win 7504
15:43:32.499213 IP mailserver.smtp > linux.52292: . ack 28896 win 65535
15:43:32.499234 IP linux.52292 > mailserver.smtp: . 33240:34688(1448) ack 542 win 7504
15:43:32.590355 IP mailserver.smtp > linux.52292: . ack 31792 win 65535
15:43:32.590376 IP linux.52292 > mailserver.smtp: . 34688:36136(1448) ack 542 win 7504
15:43:32.590408 IP linux.52292 > mailserver.smtp: P 36136:37088(952) ack 542 win 7504
15:43:32.708128 IP mailserver.smtp > linux.52292: . ack 33240 win 65535
15:43:32.708151 IP linux.52292 > mailserver.smtp: . 37088:38536(1448) ack 542 win 7504
15:43:32.789176 IP mailserver.smtp > linux.52292: . ack 36136 win 65535
15:43:32.789201 IP linux.52292 > mailserver.smtp: . 38536:39984(1448) ack 542 win 7504
15:43:32.789245 IP linux.52292 > mailserver.smtp: . 39984:41432(1448) ack 542 win 7504
15:43:32.915336 IP mailserver.smtp > linux.52292: . ack 38536 win 65535
15:43:32.915364 IP linux.52292 > mailserver.smtp: . 41432:42880(1448) ack 542 win 7504
15:43:32.915395 IP linux.52292 > mailserver.smtp: . 42880:44328(1448) ack 542 win 7504
15:43:33.024198 IP mailserver.smtp > linux.52292: . ack 41432 win 65535
15:43:33.024237 IP linux.52292 > mailserver.smtp: . 44328:45776(1448) ack 542 win 7504
15:43:33.024271 IP linux.52292 > mailserver.smtp: . 45776:47224(1448) ack 542 win 7504
15:43:33.024300 IP linux.52292 > mailserver.smtp: . 47224:48672(1448) ack 542 win 7504
15:43:33.119325 IP mailserver.smtp > linux.52292: . ack 42880 win 65535
15:43:33.119367 IP linux.52292 > mailserver.smtp: P 48672:49376(704) ack 542 win 7504
15:43:33.226202 IP mailserver.smtp > linux.52292: . ack 45776 win 65535
15:43:33.226225 IP linux.52292 > mailserver.smtp: . 49376:50824(1448) ack 542 win 7504
15:43:33.226260 IP linux.52292 > mailserver.smtp: . 50824:52272(1448) ack 542 win 7504
15:43:33.440286 IP mailserver.smtp > linux.52292: . ack 47224 win 65535
15:43:33.440320 IP linux.52292 > mailserver.smtp: . 52272:53720(1448) ack 542 win 7504
15:43:33.440403 IP mailserver.smtp > linux.52292: . ack 50824 win 65535
15:43:33.440420 IP linux.52292 > mailserver.smtp: . 53720:55168(1448) ack 542 win 7504
15:43:33.440453 IP linux.52292 > mailserver.smtp: . 55168:56616(1448) ack 542 win 7504
15:43:33.440477 IP linux.52292 > mailserver.smtp: P 56616:57568(952) ack 542 win 7504
15:43:33.539092 IP mailserver.smtp > linux.52292: . ack 52272 win 65535
15:43:33.539132 IP linux.52292 > mailserver.smtp: . 57568:59016(1448) ack 542 win 7504
15:43:33.621109 IP mailserver.smtp > linux.52292: . ack 55168 win 65535
15:43:33.621153 IP linux.52292 > mailserver.smtp: . 59016:60464(1448) ack 542 win 7504
15:43:33.621201 IP linux.52292 > mailserver.smtp: . 60464:61912(1448) ack 542 win 7504
15:43:33.749209 IP mailserver.smtp > linux.52292: . ack 57568 win 65535
15:43:33.749232 IP linux.52292 > mailserver.smtp: . 61912:63360(1448) ack 542 win 7504
15:43:33.749262 IP linux.52292 > mailserver.smtp: . 63360:64808(1448) ack 542 win 7504
15:43:33.865258 IP mailserver.smtp > linux.52292: . ack 60464 win 65535
15:43:33.865301 IP linux.52292 > mailserver.smtp: . 64808:66256(1448) ack 542 win 7504
15:43:33.865336 IP linux.52292 > mailserver.smtp: . 66256:67704(1448) ack 542 win 7504
15:43:33.959118 IP mailserver.smtp > linux.52292: . ack 61912 win 65535
15:43:33.959158 IP linux.52292 > mailserver.smtp: . 67704:69152(1448) ack 542 win 7504
15:43:34.608440 IP linux.52292 > mailserver.smtp: . 61912:63360(1448) ack 542 win 7504
15:43:34.729935 IP mailserver.smtp > linux.52292: . ack 64808 win 65535
15:43:34.729964 IP linux.52292 > mailserver.smtp: . 69152:70600(1448) ack 542 win 7504

...

15:43:45.324086 IP linux.52292 > mailserver.smtp: . 349832:351280(1448) ack 542 win 7504
15:43:45.324117 IP linux.52292 > mailserver.smtp: . 351280:352728(1448) ack 542 win 7504
15:43:45.324146 IP linux.52292 > mailserver.smtp: . 352728:354176(1448) ack 542 win 7504
15:43:45.445990 IP mailserver.smtp > linux.52292: . ack 303824 win 65535
15:43:45.446010 IP linux.52292 > mailserver.smtp: . 354176:355624(1448) ack 542 win 7504
15:43:45.446060 IP linux.52292 > mailserver.smtp: . 355624:357072(1448) ack 542 win 7504
15:43:45.569904 IP mailserver.smtp > linux.52292: . ack 306720 win 65535
15:43:45.569928 IP linux.52292 > mailserver.smtp: . 357072:358520(1448) ack 542 win 7504
15:43:45.569960 IP linux.52292 > mailserver.smtp: . 358520:359968(1448) ack 542 win 7504
15:43:45.569989 IP linux.52292 > mailserver.smtp: . 359968:361416(1448) ack 542 win 7504
15:43:45.667941 IP mailserver.smtp > linux.52292: . ack 308168 win 65535
15:43:45.667964 IP linux.52292 > mailserver.smtp: . 361416:362864(1448) ack 542 win 7504
15:43:45.752939 IP mailserver.smtp > linux.52292: . ack 311064 win 65535
15:43:45.752958 IP linux.52292 > mailserver.smtp: . 362864:364312(1448) ack 542 win 7504
15:43:45.752989 IP linux.52292 > mailserver.smtp: . 364312:365760(1448) ack 542 win 7504
15:43:45.753018 IP linux.52292 > mailserver.smtp: . 365760:367208(1448) ack 542 win 7504
15:43:45.872905 IP mailserver.smtp > linux.52292: . ack 313960 win 65535
15:43:45.872930 IP linux.52292 > mailserver.smtp: . 367208:368656(1448) ack 542 win 7504
15:43:45.872962 IP linux.52292 > mailserver.smtp: . 368656:370104(1448) ack 542 win 7504
15:43:45.993879 IP mailserver.smtp > linux.52292: . ack 316856 win 65535
15:43:45.993913 IP linux.52292 > mailserver.smtp: . 370104:371552(1448) ack 542 win 7504
15:43:45.993946 IP linux.52292 > mailserver.smtp: . 371552:373000(1448) ack 542 win 7504
15:43:45.993975 IP linux.52292 > mailserver.smtp: . 373000:374448(1448) ack 542 win 7504
15:43:46.088019 IP mailserver.smtp > linux.52292: . ack 318304 win 65535
15:43:46.088081 IP linux.52292 > mailserver.smtp: . 374448:375896(1448) ack 542 win 7504
15:43:46.176935 IP mailserver.smtp > linux.52292: . ack 321200 win 65535
15:43:46.176972 IP linux.52292 > mailserver.smtp: . 375896:377344(1448) ack 542 win 7504
15:43:46.177007 IP linux.52292 > mailserver.smtp: . 377344:378792(1448) ack 542 win 7504
15:43:46.177035 IP linux.52292 > mailserver.smtp: . 378792:380240(1448) ack 542 win 7504
15:43:46.289744 IP mailserver.smtp > linux.52292: . ack 322648 win 65535
15:43:46.289766 IP linux.52292 > mailserver.smtp: . 380240:381688(1448) ack 542 win 7504
15:43:46.357708 IP mailserver.smtp > linux.52292: . ack 325544 win 65535
15:43:46.357725 IP linux.52292 > mailserver.smtp: . 381688:383136(1448) ack 542 win 7504
15:43:46.357756 IP linux.52292 > mailserver.smtp: . 383136:384584(1448) ack 542 win 7504
15:43:46.478932 IP mailserver.smtp > linux.52292: . ack 328440 win 65535
15:43:46.478953 IP linux.52292 > mailserver.smtp: . 384584:386032(1448) ack 542 win 7504
15:43:46.478983 IP linux.52292 > mailserver.smtp: . 386032:387480(1448) ack 542 win 7504
15:43:46.479011 IP linux.52292 > mailserver.smtp: . 387480:388928(1448) ack 542 win 7504
15:43:46.599901 IP mailserver.smtp > linux.52292: . ack 331336 win 65535
15:43:46.599925 IP linux.52292 > mailserver.smtp: . 388928:390376(1448) ack 542 win 7504
15:43:46.599957 IP linux.52292 > mailserver.smtp: . 390376:391824(1448) ack 542 win 7504
15:43:46.706829 IP mailserver.smtp > linux.52292: . ack 332784 win 65535
15:43:46.706849 IP linux.52292 > mailserver.smtp: . 391824:393272(1448) ack 542 win 7504
15:43:46.781694 IP mailserver.smtp > linux.52292: . ack 335680 win 65535
15:43:46.781710 IP linux.52292 > mailserver.smtp: . 393272:394720(1448) ack 542 win 7504
15:43:46.781740 IP linux.52292 > mailserver.smtp: . 394720:396168(1448) ack 542 win 7504
15:43:46.781768 IP linux.52292 > mailserver.smtp: . 396168:397616(1448) ack 542 win 7504
15:43:46.901696 IP mailserver.smtp > linux.52292: . ack 338576 win 65535
15:43:46.901723 IP linux.52292 > mailserver.smtp: . 397616:399064(1448) ack 542 win 7504
15:43:46.901756 IP linux.52292 > mailserver.smtp: . 399064:400512(1448) ack 542 win 7504
15:43:47.023889 IP mailserver.smtp > linux.52292: . ack 341472 win 65535
15:43:47.023914 IP linux.52292 > mailserver.smtp: . 400512:401960(1448) ack 542 win 7504
15:43:47.023946 IP linux.52292 > mailserver.smtp: . 401960:403408(1448) ack 542 win 7504
15:43:47.126865 IP mailserver.smtp > linux.52292: . ack 342920 win 65535
15:43:47.126899 IP linux.52292 > mailserver.smtp: . 403408:404856(1448) ack 542 win 7504
15:43:47.126933 IP linux.52292 > mailserver.smtp: . 404856:406304(1448) ack 542 win 7504
15:43:47.205693 IP mailserver.smtp > linux.52292: . ack 345816 win 65535
15:43:47.205726 IP linux.52292 > mailserver.smtp: . 406304:407752(1448) ack 542 win 7504
15:43:47.205760 IP linux.52292 > mailserver.smtp: . 407752:409200(1448) ack 542 win 7504
15:43:47.337721 IP mailserver.smtp > linux.52292: . ack 348384 win 65535
15:43:47.337745 IP linux.52292 > mailserver.smtp: . 409200:410648(1448) ack 542 win 7504
15:43:47.337778 IP linux.52292 > mailserver.smtp: . 410648:412096(1448) ack 542 win 7504
15:43:47.434787 IP mailserver.smtp > linux.52292: . ack 351280 win 65535
15:43:47.434808 IP linux.52292 > mailserver.smtp: . 412096:413544(1448) ack 542 win 7504
15:43:47.434840 IP linux.52292 > mailserver.smtp: . 413544:414992(1448) ack 542 win 7504
15:43:47.434868 IP linux.52292 > mailserver.smtp: . 414992:416440(1448) ack 542 win 7504
15:43:47.547611 IP mailserver.smtp > linux.52292: . ack 352728 win 65535
15:43:47.547635 IP linux.52292 > mailserver.smtp: . 416440:417888(1448) ack 542 win 7504
15:43:47.615600 IP mailserver.smtp > linux.52292: . ack 355624 win 65535
15:43:47.615618 IP linux.52292 > mailserver.smtp: . 417888:419336(1448) ack 542 win 7504
15:43:47.615650 IP linux.52292 > mailserver.smtp: . 419336:420784(1448) ack 542 win 7504
15:43:47.743710 IP mailserver.smtp > linux.52292: . ack 358520 win 65535
15:43:47.743727 IP linux.52292 > mailserver.smtp: . 420784:422232(1448) ack 542 win 7504
15:43:47.743759 IP linux.52292 > mailserver.smtp: . 422232:423680(1448) ack 542 win 7504
15:43:47.870591 IP mailserver.smtp > linux.52292: . ack 361416 win 65535
15:43:47.870613 IP linux.52292 > mailserver.smtp: . 423680:425128(1448) ack 542 win 7504
15:43:47.870644 IP linux.52292 > mailserver.smtp: . 425128:426576(1448) ack 542 win 7504
15:43:47.967659 IP mailserver.smtp > linux.52292: . ack 362864 win 65535
15:43:47.967695 IP linux.52292 > mailserver.smtp: . 426576:428024(1448) ack 542 win 7504
15:43:48.054611 IP mailserver.smtp > linux.52292: . ack 365760 win 65535
15:43:48.054643 IP linux.52292 > mailserver.smtp: . 428024:429472(1448) ack 542 win 7504
15:43:48.054677 IP linux.52292 > mailserver.smtp: . 429472:430920(1448) ack 542 win 7504
15:43:48.177804 IP mailserver.smtp > linux.52292: . ack 368656 win 65535
15:43:48.177845 IP linux.52292 > mailserver.smtp: . 430920:432368(1448) ack 542 win 7504
15:43:48.177879 IP linux.52292 > mailserver.smtp: . 432368:433816(1448) ack 542 win 7504
15:43:48.296768 IP mailserver.smtp > linux.52292: . ack 371552 win 65535
15:43:48.296790 IP linux.52292 > mailserver.smtp: . 433816:435264(1448) ack 542 win 7504
15:43:48.296820 IP linux.52292 > mailserver.smtp: . 435264:436712(1448) ack 542 win 7504
15:43:48.386685 IP mailserver.smtp > linux.52292: . ack 373000 win 65535
15:43:48.386702 IP linux.52292 > mailserver.smtp: . 436712:438160(1448) ack 542 win 7504
15:43:48.478585 IP mailserver.smtp > linux.52292: . ack 375896 win 65535
15:43:48.478605 IP linux.52292 > mailserver.smtp: . 438160:439608(1448) ack 542 win 7504
15:43:48.478636 IP linux.52292 > mailserver.smtp: . 439608:441056(1448) ack 542 win 7504
15:43:48.597559 IP mailserver.smtp > linux.52292: . ack 377344 win 65535
15:43:48.597581 IP linux.52292 > mailserver.smtp: . 441056:442504(1448) ack 542 win 7504
15:43:48.806718 IP mailserver.smtp > linux.52292: . ack 378792 win 65535
15:43:48.806740 IP linux.52292 > mailserver.smtp: . 442504:443952(1448) ack 542 win 7504
15:43:52.032437 IP linux.52292 > mailserver.smtp: . 378792:380240(1448) ack 542 win 7504
15:43:52.153192 IP mailserver.smtp > linux.52292: . ack 383136 win 65535
15:43:52.153228 IP linux.52292 > mailserver.smtp: . 443952:445400(1448) ack 542 win 7504
15:43:52.153262 IP linux.52292 > mailserver.smtp: . 445400:446848(1448) ack 542 win 7504
15:43:52.153362 IP mailserver.smtp > linux.52292: . ack 387480 win 65535
15:43:52.153381 IP linux.52292 > mailserver.smtp: . 446848:448296(1448) ack 542 win 7504
15:43:59.048438 IP linux.52292 > mailserver.smtp: . 387480:388928(1448) ack 542 win 7504
15:43:59.170481 IP mailserver.smtp > linux.52292: . ack 390376 win 65535
15:43:59.170516 IP linux.52292 > mailserver.smtp: . 448296:449744(1448) ack 542 win 7504
15:43:59.170551 IP linux.52292 > mailserver.smtp: . 449744:451192(1448) ack 542 win 7504
15:43:59.172438 IP mailserver.smtp > linux.52292: . ack 394720 win 65535
15:43:59.172457 IP linux.52292 > mailserver.smtp: . 451192:452640(1448) ack 542 win 7504
15:43:59.295693 IP mailserver.smtp > linux.52292: . ack 396168 win 65535
15:44:22.548439 IP linux.52292 > mailserver.smtp: . 396168:397616(1448) ack 542 win 7504
15:44:22.669245 IP mailserver.smtp > linux.52292: . ack 399064 win 65535
15:44:22.669266 IP linux.52292 > mailserver.smtp: . 452640:454088(1448) ack 542 win 7504
15:44:22.669299 IP linux.52292 > mailserver.smtp: . 454088:455536(1448) ack 542 win 7504
15:44:22.669399 IP mailserver.smtp > linux.52292: . ack 404856 win 65535
15:44:22.669427 IP linux.52292 > mailserver.smtp: . 455536:456984(1448) ack 542 win 7504
15:45:15.916435 IP linux.52292 > mailserver.smtp: . 404856:406304(1448) ack 542 win 7504
15:45:16.127748 IP mailserver.smtp > linux.52292: . ack 406304 win 65535
15:45:16.127773 IP linux.52292 > mailserver.smtp: . 456984:458432(1448) ack 542 win 7504
15:45:16.127804 IP linux.52292 > mailserver.smtp: . 458432:459880(1448) ack 542 win 7504

...

The full packet flow can be found in the attached dump. Another mail seems
to be transmitted while the first was stalling, but the issue is the same,
the timing information shows no active transfer for over 60s.

Thomas

Download attachment "smtp.tcpdump.bz2" of type "application/x-bzip2" (10663 bytes)

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