netdev - Re: TCP connection issues against Amazon S3

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Message-Id: <DCC8B9AB-D1D7-4722-9B65-93AB5A559763@bengler.no>
Date:	Thu, 8 Jan 2015 17:47:55 +0000
From:	Erik Grinaker <erik@...gler.no>
To:	Eric Dumazet <eric.dumazet@...il.com>
Cc:	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 21:33, Eric Dumazet <eric.dumazet@...il.com> wrote:
> On Wed, 2015-01-07 at 20:37 +0000, Erik Grinaker wrote:
> I agree. I have contacted Amazon about this, but am not too hopeful
>> for a quick fix; they have been promising SACK-support on their
>> loadbalancers since 2006, for example.
>> 
>> That said, since this change breaks a service as popular as S3, it
>> might be worth reconsidering.
> 
> Which change are you talking about ? Have you done a bisection to
> clearly identify the patch exposing this sender bug ?

FWIW, I've done a bisection, and it’s triggered by this change:

https://github.com/torvalds/linux/commit/4e4f1fc226816905c937f9b29dabe351075dfe0f

> We are not going to stick TCP stack to 20th century and buggy peers or
> middleboxes, sorry.

That’s fair enough.--
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