netdev - Re: TCP connection issues against Amazon S3

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Message-Id: <6156B1A1-29C5-46D8-949E-0A296D5E85A2@bengler.no>
Date:	Wed, 7 Jan 2015 13:06:39 +0000
From:	Erik Grinaker <erik@...gler.no>
To:	Lukas Tribus <luky-37@...mail.com>
Cc:	Eric Dumazet <eric.dumazet@...il.com>,
	Yuchung Cheng <ycheng@...gle.com>,
	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
	netdev <netdev@...r.kernel.org>
Subject: Re: TCP connection issues against Amazon S3

On 07 Jan 2015, at 01:23, Lukas Tribus <luky-37@...mail.com> wrote:
>> This still doesn’t explain why it works with older kernels, but not newer ones.
> 
> Can you try the different 3.12-rc kernels? The information that this was
> introduced in 3.12-rc1 as opposed to a specific -rc>1 releases may help
> the guys here to pinpoint what exactly caused the behavior change on the
> receiver side.

I can reproduce the problem with 3.12.0-rc1 as well.

I also tried 3.11.10 again, to make sure it did not have the problem even when forcing requests to a non-SACK-enabled loadbalancer, and it works as it should (no hung connections).


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