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

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Date:	Thu, 24 Jul 2008 01:36:49 -0700 (PDT)
From:	David Miller <davem@...emloft.net>
To:	mingo@...e.hu
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
Subject: Re: [TCP bug, regression] stuck distcc connections in latest -git

From: Ingo Molnar <mingo@...e.hu>
Date: Thu, 24 Jul 2008 10:27:30 +0200

> * Herbert Xu <herbert@...dor.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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