Date: Thu, 24 Jul 2008 01:36:49 -0700 (PDT)
Message-Id: <20080724.013649.22662901.davem@davemloft.net>
To: mingo@elte.hu
Cc: herbert@gondor.apana.org.au, w@1wt.eu, davidn@davidnewall.com,
       torvalds@linux-foundation.org, akpm@linux-foundation.org,
       netdev@vger.kernel.org, linux-kernel@vger.kernel.org,
       stefanr@s5r6.in-berlin.de, rjw@sisk.pl
Subject: Re: [TCP bug, regression] stuck distcc connections in latest -git
From: David Miller <davem@davemloft.net>
In-Reply-To: <20080724082730.GA29046@elte.hu>
References: <20080724063242.GA9051@elte.hu>
	<E1KLvds-0001Mc-00@gondolin.me.apana.org.au>
	<20080724082730.GA29046@elte.hu>
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From: Ingo Molnar <mingo@elte.hu>
Date: Thu, 24 Jul 2008 10:27:30 +0200

> * Herbert Xu <herbert@gondor.apana.org.au> wrote:
> 
> > BTW any reason why you appear to have SACK off?
> 
> default distro setup, Fedora 9 and Fedora 8. No extra tweaking that i'm 
> aware of.

It's probably a side effect of their turning on syncookies in /etc/sysctl.conf :-/

I thought we added code that would allow enabling those options
even with syncookies enabled?  There is code in net/ipv4/syncookies.c
function cookie_check_timestamp() to handle this.

Of course this is a recent addition, so if either side doesn't
have that change.
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