linux-kernel - Re: cups slow on linux-2.6.24

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Message-ID: <47A13573.7090804@trash.net>
Date:	Thu, 31 Jan 2008 03:41:55 +0100
From:	Patrick McHardy <kaber@...sh.net>
To:	Jeff Chua <jeff.chua.linux@...il.com>
CC:	Jozsef Kadlecsik <kadlec@...ckhole.kfki.hu>,
	lkml <linux-kernel@...r.kernel.org>,
	Krzysztof Piotr Oledzki <ole@....pl>,
	"David S. Miller" <davem@...emloft.net>,
	cups-bugs <cups-bugs@...ysw.com>,
	Netfilter Development Mailinglist 
	<netfilter-devel@...r.kernel.org>
Subject: Re: cups slow on linux-2.6.24

Jeff Chua wrote:
> On Jan 31, 2008 10:23 AM, Jeff Chua <jeff.chua.linux@...il.com> wrote:
>
>   
>> Again, using latest linux, one with
>> 17311393f969090ab060540bd9dbe7dc885a76d5 reverted, and the other
>> without.
>>     
>
> Sorry, here's the attached output files.

Thanks. In the dump we can see that connections reusing ports
always have their first SYN dropped and retransmissted three
seconds later. I'm not sure whats causing this yet, do you have
any firewall rules that affect loopback traffic?

This filter (wireshark) shows one example of the problem in case
someone else wants to have a look:

(tcp.dstport == 1017 || tcp.srcport == 1017) && (tcp.flags == 0x02)

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