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Date: Mon, 10 Aug 2015 14:53:11 -0700 From: Jovi Zhangwei <jovi@...udflare.com> To: Neal Cardwell <ncardwell@...gle.com> Cc: Martin KaFai Lau <kafai@...com>, Eric Dumazet <edumazet@...gle.com>, Netdev <netdev@...r.kernel.org>, David Miller <davem@...emloft.net>, Alexey Kuznetsov <kuznet@....inr.ac.ru>, James Morris <jmorris@...ei.org>, Hideaki YOSHIFUJI <yoshfuji@...ux-ipv6.org>, Patrick McHardy <kaber@...sh.net>, FB Kernel Team <kernel-team@...com> Subject: Re: kernel warning in tcp_fragment Hi Neal, Great thanks for your reply, we will arrange testing against that patch. On Mon, Aug 10, 2015 at 11:35 AM, Neal Cardwell <ncardwell@...gle.com> wrote: > On Mon, Aug 10, 2015 at 2:10 PM, Jovi Zhangwei <jovi@...udflare.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? Previous reports ( > https://patchwork.ozlabs.org/patch/480882/ ) have shown that this gets > rid of at least one source of the warning. So that would provide a > useful data point. > > Separately, you could also try the attached patch. This is against > 3.14.39. It tries to attack a different possible source of this > warning. Please let us know if that patch helps. > > Thanks! > > neal -- To unsubscribe from this list: send the line "unsubscribe netdev" in the body of a message to majordomo@...r.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html
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