netdev - Re: [fixed] [patch] Re: [bug] stuck localhost TCP connections, v2.6.26-rc3+

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Message-Id: <20080603.150344.145518113.davem@davemloft.net>
Date:	Tue, 03 Jun 2008 15:03:44 -0700 (PDT)
From:	David Miller <davem@...emloft.net>
To:	ilpo.jarvinen@...sinki.fi
Cc:	mingo@...e.hu, peterz@...radead.org, linux-kernel@...r.kernel.org,
	netdev@...r.kernel.org, rjw@...k.pl, akpm@...ux-foundation.org,
	johnpol@....mipt.ru, mcmanus@...ksong.com
Subject: Re: [fixed] [patch] Re: [bug] stuck localhost TCP connections,
 v2.6.26-rc3+

From: "Ilpo_Järvinen" <ilpo.jarvinen@...sinki.fi>
Date: Wed, 4 Jun 2008 01:01:25 +0300 (EEST)

> On Wed, 4 Jun 2008, Ilpo Järvinen wrote:
> 
> > ...I couldn't immediately find anything obviously wrong with those changes 
> > but the patch below might be worth of a try (without the revert of 
> > course). If it ever spits out that WARN_ON for you, we were playing with 
> > fire too much and it's better to return on the safe side there...
> 
> 
> > [PATCH] tcp DEFER_ACCEPT: see if header prediction got turned on
> > 
> > If header prediction is turned on under some circumstances,
> > DA can deadlock though I have great trouble in figuring out
> 
> ...Nah, keepalive timer would then eventually kill it then, so no
> deadlock seems possible through that one.

Keepalive is very long, it might still "seem" like a deadlock for
someone without much patience :-)
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