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From: Stephen Hemminger <shemminger@osdl.org>
To: Debi Janos <debi.janos@freemail.hu>
Cc: linux-kernel@vger.kernel.org, linux-net@vger.kernel.org,
	"David S. Miller" <davem@redhat.com>
Subject: Re: 2.6.7-mm1 - 2.6.7-mm4 weird http behavior
Date: Tue, 29 Jun 2004 11:22:56 -0700	[thread overview]
Message-ID: <20040629112256.58828632@dell_ss3.pdx.osdl.net> (raw)
In-Reply-To: <freemail.20040529152006.85505@fm4.freemail.hu>

On Tue, 29 Jun 2004 15:20:06 +0200 (CEST)
Debi Janos <debi.janos@freemail.hu> wrote:

> I am found an interesting (bug?) feature in kernels between
> 2.6.7-mm1 and 2.6.7-mm4
> 
> Some web pages eg. 
> 
> http://www.hup.hu/
> http://portal.fsn.hu/
> http://wiki.hup.hu/
> 
> is unreachable with these kernels. If i try kernel versions
> <= 2.6.7 everything is O.K. above-mentioned all web pages works.
> 
> I try this web pages with some different operating systems
> like Windows, OpenBSD, FreeBSD, WinCe... and seems working
> fine for me.
> 
> Any idea?

Dave enabled the receive buffer auto-tuning which uses TCP window
scaling.  It looks like all these sites are running FreeBSD, perhaps
there is a bug in FreeBSD?

As suggested earlier please get a TCP dump of a failed connection.

To turn of receive buffer auto-tuning:
	sysctl -w net.ipv4.tcp_moderate_rcvbuf=0
	sysctl -w net.ipv4.tcp_default_win_scale=0

Thanks.

  parent reply	other threads:[~2004-06-29 18:23 UTC|newest]

Thread overview: 27+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2004-06-29 13:20 Debi Janos
2004-06-29 15:45 ` bert hubert
2004-06-29 16:57   ` Debi Janos
2004-06-29 17:28     ` bert hubert
     [not found]       ` <freemail.20040529200446.32881@fm2.freemail.hu>
2004-06-29 18:38         ` bert hubert
2004-06-29 18:47           ` Debi Janos
2004-06-29 22:46             ` Redeeman
2004-06-29 17:27 ` Jesse Stockall
2004-06-29 17:39   ` FabF
2004-06-29 18:22 ` Stephen Hemminger [this message]
2004-06-29 18:50   ` David S. Miller
2004-06-29 19:07     ` Debi Janos
2004-06-29 19:13   ` Jesse Stockall
2004-06-29 19:49   ` Stephen Hemminger
2004-06-29 19:54     ` David S. Miller
2004-06-29 20:35       ` Stephen Hemminger
2004-06-29 20:59         ` David S. Miller
2004-06-29 21:02           ` Stephen Hemminger
2004-06-29 21:36             ` John Heffner
2004-06-29 21:53               ` David S. Miller
2004-06-29 21:58                 ` Martin Schlemmer
2004-06-30  8:04               ` Debi Janos
2004-06-30  8:04               ` Debi Janos
2004-06-30 20:14                 ` David S. Miller
2004-06-30 20:20                   ` John Heffner
2004-06-29 18:40 Debi Janos
2004-06-29 22:39 ` Redeeman

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