netdev - Re: kernel warning in tcp

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Date:	Mon, 10 Aug 2015 11:10:05 -0700
From:	Jovi Zhangwei <jovi@...udflare.com>
To:	Martin KaFai Lau <kafai@...com>
Cc:	Eric Dumazet <edumazet@...gle.com>,
	Neal Cardwell <ncardwell@...gle.com>, netdev@...r.kernel.org,
	davem@...emloft.net, Alexey Kuznetsov <kuznet@....inr.ac.ru>,
	jmorris@...ei.org, yoshfuji@...ux-ipv6.org,
	Patrick McHardy <kaber@...sh.net>,
	FB Kernel Team <kernel-team@...com>
Subject: Re: kernel warning in tcp_fragment

Ping?

We saw a lot of this warnings in our production system. It would be
great appreciate if someone can give us the fix on this warnings. :)

On Fri, Jul 31, 2015 at 11:04 AM, Jovi Zhangwei <jovi@...udflare.com> wrote:
> Hi Eric,
>
> Would you like share your thought on this bug? great thanks.
>
>
> On Mon, Jul 27, 2015 at 4:19 PM, Martin KaFai Lau <kafai@...com> wrote:
>> On Wed, Jul 22, 2015 at 11:55:35AM -0700, Jovi Zhangwei wrote:
>>> Sorry for disturbing, our production system(3.14 and 3.18 stable
>>> kernel) have many tcp_fragment warnings,
>>> the trace is same as below one which you discussed before.
>>>
>>> https://urldefense.proofpoint.com/v1/url?u=http://comments.gmane.org/gmane.linux.network/365658&k=ZVNjlDMF0FElm4dQtryO4A%3D%3D%0A&r=%2Faj1ZOQObwbmtLwlDw3XzQ%3D%3D%0A&m=fQUME5h%2FYY3oZjXbnLC3z6TaEEcTBSCAji4PkNqFjq8%3D%0A&s=1527f3221a6f31cba9544e5ddaa20986aafe8be8c898b42c7e9ce5e68d3803d8
>>>
>>> But I didn't found the final solution in that mail thread, do you have
>>> any new ideas or patches on this warning?
>>
>> I think the following points to the last discussion.  We are currently using a
>> similar patch:
>> http://comments.gmane.org/gmane.linux.network/366549
>>
>> Eric, any update on your findings? or you have already pushed a fix?
>>
>> Thanks,
>> --Martin
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