netdev - Re: v3.8.5: "TCP: snd_cwnd is nul, please report this bug."

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Date:	Sun, 02 Jun 2013 07:22:36 -0700
From:	Eric Dumazet <eric.dumazet@...il.com>
To:	Bjørn Mork <bjorn@...k.no>
Cc:	Eric Dumazet <edumazet@...gle.com>, netdev@...r.kernel.org,
	Yuchung Cheng <ycheng@...gle.com>,
	Neal Cardwell <ncardwell@...gle.com>
Subject: Re: v3.8.5: "TCP: snd_cwnd is nul, please report this bug."

On Sun, 2013-06-02 at 12:19 +0200, Bjørn Mork wrote:

> Just FYI, in case you wondered what happened here...
> 
> I've been running with the debug patch since you sent it to me, and
> still is.  But the warning has not yet reappeared.
> 
> I'll continue using the patch for a while, but will eventually drop it
> if the warning cannot be reproduced in another couple of weeks time.
> There have been a few fixes to iwlwifi in the meantime, and I do not
> rule out the possibility that some of these removed the triggering
> event.
> 

What exact tree are you running ?

F-RTO code was replaced by Yuching Cheng, and it might very well have
solved these issues.

commit e33099f96d99c391b3325caa9c44258de04aae86 
("tcp: implement RFC5682 F-RTO")

commit ab42d9ee3d215ab74a49818ffc53771a88ce7ddf
("tcp: refactor CA_Loss state processing")

commit 9b44190dc114c1720b34975b5bfc65aece112ced
("tcp: refactor F-RTO")

Thanks


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