From: "Damon L. Chesser" <damon@damtek.com>
To: "Ilpo Järvinen" <ilpo.jarvinen@helsinki.fi>
Cc: Bug 213081 <213081@bugs.launchpad.net>,
478062@bugs.debian.org, Netdev <netdev@vger.kernel.org>,
David Miller <davem@davemloft.net>
Subject: Re: Fix FRTO+NewReno problem (Was: Re: This has a work around)
Date: Thu, 08 May 2008 14:16:29 -0400 [thread overview]
Message-ID: <4823437D.20005@damtek.com> (raw)
In-Reply-To: <Pine.LNX.4.64.0805072357240.23091@wrl-59.cs.helsinki.fi>
[-- Attachment #1: Type: text/plain, Size: 932 bytes --]
Ilpo Järvinen wrote:
> SNIP
>
> Could you next try with tcp_frto set to 1, if my theory proves to be
> correct, it too should be "enough" to fix the problem (in this
> particular case). Of course you can verify the patch below too if you
> want to, the patch should allow cups<->printer to work with tcp_frto =
> 2 too. In case you have problem to apply the patch to the particular
> version you're want to try with, just send a note about the version
> number to me so I can adapt the patch for you (space etc. formatting
> issues may show up because I recently run a code style cleanup on the
> tcp code).
Ilpo,
reran the print job with the correct kernel (for control reasons) and
received the same results: tcp_frto=1 no print. tcp_frto=0 I can
print. Attached is the output of tcpdump
uname -r = 2.6.24-1-amd64
Thanks for the work!
--
Damon L. Chesser
damon@damtek.com
http://www.linkedin.com/in/dchesser
[-- Attachment #2: frtoprob2.txt --]
[-- Type: text/plain, Size: 4445 bytes --]
1210269685.442292 IP (tos 0x0, ttl 64, id 65247, offset 0, flags [DF], proto TCP (6), length 552) 192.168.200.15.53527 > 192.168.200.150.9100: P 1730585386:1730585898(512) ack 129179649 win 5840
1210269685.446179 IP (tos 0x0, ttl 100, id 22, offset 0, flags [none], proto TCP (6), length 40) 192.168.200.150.9100 > 192.168.200.15.53527: ., cksum 0x7134 (correct), 1:1(0) ack 512 win 1024
1210269685.446221 IP (tos 0x0, ttl 64, id 65248, offset 0, flags [DF], proto TCP (6), length 552) 192.168.200.15.53527 > 192.168.200.150.9100: P 1024:1536(512) ack 1 win 5840
1210269686.140866 IP (tos 0x0, ttl 100, id 23, offset 0, flags [none], proto TCP (6), length 40) 192.168.200.150.9100 > 192.168.200.15.53527: ., cksum 0x7134 (correct), 1:1(0) ack 512 win 1024
1210269714.626282 IP (tos 0x0, ttl 64, id 65249, offset 0, flags [DF], proto TCP (6), length 552) 192.168.200.15.53527 > 192.168.200.150.9100: . 512:1024(512) ack 1 win 5840
1210269714.632392 IP (tos 0x0, ttl 100, id 24, offset 0, flags [none], proto TCP (6), length 40) 192.168.200.150.9100 > 192.168.200.15.53527: ., cksum 0x6f34 (correct), 1:1(0) ack 1024 win 1024
1210269714.632425 IP (tos 0x0, ttl 64, id 65250, offset 0, flags [DF], proto TCP (6), length 552) 192.168.200.15.53527 > 192.168.200.150.9100: . 1536:2048(512) ack 1 win 5840
1210269715.327141 IP (tos 0x0, ttl 100, id 25, offset 0, flags [none], proto TCP (6), length 40) 192.168.200.150.9100 > 192.168.200.15.53527: ., cksum 0x6f34 (correct), 1:1(0) ack 1024 win 1024
1210269772.998283 IP (tos 0x0, ttl 64, id 65251, offset 0, flags [DF], proto TCP (6), length 552) 192.168.200.15.53527 > 192.168.200.150.9100: P 1024:1536(512) ack 1 win 5840
1210269773.005111 IP (tos 0x0, ttl 100, id 29, offset 0, flags [none], proto TCP (6), length 40) 192.168.200.150.9100 > 192.168.200.15.53527: ., cksum 0x6d34 (correct), 1:1(0) ack 1536 win 1024
1210269773.005144 IP (tos 0x0, ttl 64, id 65252, offset 0, flags [DF], proto TCP (6), length 552) 192.168.200.15.53527 > 192.168.200.150.9100: P 2048:2560(512) ack 1 win 5840
1210269773.704682 IP (tos 0x0, ttl 100, id 30, offset 0, flags [none], proto TCP (6), length 40) 192.168.200.150.9100 > 192.168.200.15.53527: ., cksum 0x6d34 (correct), 1:1(0) ack 1536 win 1024
1210269889.738282 IP (tos 0x0, ttl 64, id 65253, offset 0, flags [DF], proto TCP (6), length 552) 192.168.200.15.53527 > 192.168.200.150.9100: . 1536:2048(512) ack 1 win 5840
1210269889.745981 IP (tos 0x0, ttl 100, id 37, offset 0, flags [none], proto TCP (6), length 40) 192.168.200.150.9100 > 192.168.200.15.53527: ., cksum 0x6b34 (correct), 1:1(0) ack 2048 win 1024
1210269889.746012 IP (tos 0x0, ttl 64, id 65254, offset 0, flags [DF], proto TCP (6), length 552) 192.168.200.15.53527 > 192.168.200.150.9100: . 2560:3072(512) ack 1 win 5840
1210269890.444886 IP (tos 0x0, ttl 100, id 38, offset 0, flags [none], proto TCP (6), length 40) 192.168.200.150.9100 > 192.168.200.15.53527: ., cksum 0x6b34 (correct), 1:1(0) ack 2048 win 1024
1210270009.746305 IP (tos 0x0, ttl 64, id 65255, offset 0, flags [DF], proto TCP (6), length 552) 192.168.200.15.53527 > 192.168.200.150.9100: P 2048:2560(512) ack 1 win 5840
1210270009.752297 IP (tos 0x0, ttl 100, id 42, offset 0, flags [none], proto TCP (6), length 40) 192.168.200.150.9100 > 192.168.200.15.53527: ., cksum 0x6934 (correct), 1:1(0) ack 2560 win 1024
1210270009.752335 IP (tos 0x0, ttl 64, id 65256, offset 0, flags [DF], proto TCP (6), length 552) 192.168.200.15.53527 > 192.168.200.150.9100: P 3072:3584(512) ack 1 win 5840
1210270010.449445 IP (tos 0x0, ttl 100, id 43, offset 0, flags [none], proto TCP (6), length 40) 192.168.200.150.9100 > 192.168.200.15.53527: ., cksum 0x6934 (correct), 1:1(0) ack 2560 win 1024
1210270129.749294 IP (tos 0x0, ttl 64, id 65257, offset 0, flags [DF], proto TCP (6), length 552) 192.168.200.15.53527 > 192.168.200.150.9100: . 2560:3072(512) ack 1 win 5840
1210270129.755196 IP (tos 0x0, ttl 100, id 47, offset 0, flags [none], proto TCP (6), length 40) 192.168.200.150.9100 > 192.168.200.15.53527: ., cksum 0x6734 (correct), 1:1(0) ack 3072 win 1024
1210270129.755227 IP (tos 0x0, ttl 64, id 65258, offset 0, flags [DF], proto TCP (6), length 552) 192.168.200.15.53527 > 192.168.200.150.9100: . 3584:4096(512) ack 1 win 5840
1210270130.453997 IP (tos 0x0, ttl 100, id 48, offset 0, flags [none], proto TCP (6), length 40) 192.168.200.150.9100 > 192.168.200.15.53527: ., cksum 0x6734 (correct), 1:1(0) ack 3072 win 1024
next prev parent reply other threads:[~2008-05-08 18:16 UTC|newest]
Thread overview: 24+ messages / expand[flat|nested] mbox.gz Atom feed top
[not found] <48207F06.50306@damtek.com>
[not found] ` <Pine.LNX.4.64.0805061912350.8965@wrl-59.cs.helsinki.fi>
[not found] ` <4821C37A.7040306@damtek.com>
2008-05-07 22:26 ` Fix FRTO+NewReno problem (Was: Re: This has a work around) Ilpo Järvinen
2008-05-08 8:10 ` Fix FRTO+NewReno problem David Miller
2008-05-08 16:50 ` Bug#478062: Fix FRTO+NewReno problem (Was: Re: This has a work around) Damon L. Chesser
2008-05-08 17:05 ` Damon L. Chesser
2008-05-08 18:16 ` Damon L. Chesser [this message]
2008-05-08 20:42 ` Ilpo Järvinen
2008-05-12 10:08 ` Ilpo Järvinen
[not found] ` <4828279C.3010102@damtek.com>
2008-05-12 11:32 ` Ilpo Järvinen
2008-05-12 11:55 ` Damon L. Chesser
2008-05-12 12:07 ` Ilpo Järvinen
2008-05-12 13:44 ` Damon L. Chesser
2008-05-12 14:35 ` Ilpo Järvinen
2008-05-12 16:40 ` Ilpo Järvinen
2008-05-12 17:02 ` Damon L. Chesser
2008-05-12 18:23 ` Ilpo Järvinen
2008-05-12 18:39 ` Damon L. Chesser
2008-05-12 19:12 ` Ilpo Järvinen
2008-05-12 19:18 ` Damon L. Chesser
2008-05-12 19:25 ` Ilpo Järvinen
2008-05-12 22:48 ` Fix FRTO+NewReno problem David Miller
2008-05-13 9:42 ` Ilpo Järvinen
2008-05-13 9:49 ` David Miller
2008-05-13 10:04 ` Ilpo Järvinen
2008-05-13 10:08 ` David Miller
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