From: Jovi Zhangwei <jovi@cloudflare.com>
To: Martin KaFai Lau <kafai@fb.com>
Cc: Neal Cardwell <ncardwell@google.com>,
Eric Dumazet <edumazet@google.com>,
Netdev <netdev@vger.kernel.org>,
David Miller <davem@davemloft.net>,
Alexey Kuznetsov <kuznet@ms2.inr.ac.ru>,
James Morris <jmorris@namei.org>,
Hideaki YOSHIFUJI <yoshfuji@linux-ipv6.org>,
Patrick McHardy <kaber@trash.net>,
FB Kernel Team <kernel-team@fb.com>
Subject: Re: kernel warning in tcp_fragment
Date: Thu, 13 Aug 2015 16:05:04 -0700 [thread overview]
Message-ID: <CABPcSqKbMPjuwUSirQJ9BWwLp8eteCr85PnCbjjVcpgKbtnE2g@mail.gmail.com> (raw)
In-Reply-To: <20150813034528.GC2871239@devbig242.prn2.facebook.com>
Hi,
On Wed, Aug 12, 2015 at 8:45 PM, Martin KaFai Lau <kafai@fb.com> wrote:
> On Mon, Aug 10, 2015 at 02:35:37PM -0400, Neal Cardwell wrote:
>> On Mon, Aug 10, 2015 at 2:10 PM, Jovi Zhangwei <jovi@cloudflare.com> wrote:
>> >
>> > 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. :)
>>
>> What is your net.ipv4.tcp_mtu_probing setting? If 1, have you tried
>> setting it to 0?
>
> Hi Jovi, If setting net.ipv4.tcp_mtu_probing=0 helps, can you give the
> patch we posted earlier a try: https://patchwork.ozlabs.org/patch/481609/
> It is the same patch that I pointed out earlier. You can click
> on the download link.
>
> We are currently using a similar patch while keeping net.ipv4.tcp_mtu_probing=1.
>
Our system need net.ipv4.tcp_mtu_probing, so we cannot set it to 0.
We are testing previous patch given by Neal, I will let you know the result.
Thanks.
next prev parent reply other threads:[~2015-08-13 23:05 UTC|newest]
Thread overview: 13+ messages / expand[flat|nested] mbox.gz Atom feed top
2015-07-22 18:55 kernel warning in tcp_fragment Jovi Zhangwei
2015-07-27 19:08 ` Jovi Zhangwei
2015-07-27 23:19 ` Martin KaFai Lau
2015-07-31 18:04 ` Jovi Zhangwei
2015-08-10 18:10 ` Jovi Zhangwei
2015-08-10 18:35 ` Neal Cardwell
2015-08-10 21:53 ` Jovi Zhangwei
2015-08-13 3:45 ` Martin KaFai Lau
2015-08-13 23:05 ` Jovi Zhangwei [this message]
2015-09-01 23:02 ` Grant Zhang
2015-09-14 18:12 ` Martin KaFai Lau
[not found] ` <CABPcSqJMS3oYLbL=Ns71ciF_9rcZNuZ0VceV=noaLJgV=LTAQQ@mail.gmail.com>
2015-09-14 18:15 ` Neal Cardwell
[not found] ` <CABPcSqJEoVAXk+PAZCWgD6LFV0Nxz7ON3CUuZZMgrcRQFLK44w@mail.gmail.com>
2015-10-19 10:57 ` Jovi Zhangwei
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