netdev - Re: [Bugme-new] [Bug 10767] New: Seg Fault Instead of Swapping

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Message-Id: <20080604.112015.241905253.davem@davemloft.net>
Date:	Wed, 04 Jun 2008 11:20:15 -0700 (PDT)
From:	David Miller <davem@...emloft.net>
To:	ilpo.jarvinen@...sinki.fi
Cc:	brian.vowell@...il.com, akpm@...ux-foundation.org,
	netdev@...r.kernel.org, bugme-daemon@...zilla.kernel.org
Subject: Re: [Bugme-new] [Bug 10767] New: Seg Fault Instead of Swapping

From: "Ilpo_Järvinen" <ilpo.jarvinen@...sinki.fi>
Date: Wed, 4 Jun 2008 10:12:04 +0300 (EEST)

> On Tue, 3 Jun 2008, David Miller wrote:
> 
> > From: "Ilpo_Järvinen" <ilpo.jarvinen@...sinki.fi>
> > Date: Mon, 26 May 2008 14:24:33 +0300 (EEST)
> > 
> > Ilpo, do you want me to apply this to net-2.6?
> 
> Yes thanks, it is necessary to keep the state consistent (it also explains 
> some .22/23 time left_out warn_ons too which were mysterious back then).
> Also -stable (I guess it would be necessary to almost any older stable
> too though some older ones might want to sync left_out on that same place 
> too).
> 
> It was nice that this path was also triggered while running the TCP 
> debug patch (I haven't gotten a one in here), otherwise we would never
> have known though I started to suspect that such path existed once I
> tried to analyze those left_out problems (before it got dropped 
> altogether), but I just couldn't find the problem because it lies on 
> such "error path" which was too easy to overlook.

Ok I've add the patch to net-2.6, thanks!

> I also finally have found the cause to the !sacked_out && fackets_out
> trap :-). ...I'll post the fix to that later today to relevant parties.

I'll have a look at this too :-)

Thanks for all of your incredible work on TCP bug fixing!
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