netdev - Re: [TCP bug, regression] stuck distcc connections in latest -git

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Message-ID: <20080724093411.GA12001@elte.hu>
Date:	Thu, 24 Jul 2008 11:34:11 +0200
From:	Ingo Molnar <mingo@...e.hu>
To:	David Miller <davem@...emloft.net>
Cc:	herbert@...dor.apana.org.au, w@....eu, davidn@...idnewall.com,
	torvalds@...ux-foundation.org, akpm@...ux-foundation.org,
	netdev@...r.kernel.org, linux-kernel@...r.kernel.org,
	stefanr@...6.in-berlin.de, rjw@...k.pl, ilpo.jarvinen@...sinki.fi,
	Dave Jones <davej@...hat.com>
Subject: Re: [TCP bug, regression] stuck distcc connections in latest -git


* David Miller <davem@...emloft.net> wrote:

> BTW, if someone can contact the Fedora folks, specifically whoever 
> added that syncookies enable to /etc/sysctl.conf, and let them know 
> that they've set our TCP stack back by 10 years by disabling SACK and 
> timestamps, I'd really appreciate it.

Server box (F9) has:

 # Controls the use of TCP syncookies
 net.ipv4.tcp_syncookies = 1

 timestamp of /etc/sysctl.conf: 2008-05-15, installation default i think.

Other (F8) box has:

 # Controls the use of TCP syncookies
 net.ipv4.tcp_syncookies = 0

 timestamp of /etc/sysctl.conf: 2007-01-28, touched 1.5 years ago.

Have not checked the install defaults - if i touched them it was a long 
time ago.

	Ingo
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