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Date: Thu, 13 Aug 2015 16:05:04 -0700 From: Jovi Zhangwei <jovi@...udflare.com> To: Martin KaFai Lau <kafai@...com> Cc: Neal Cardwell <ncardwell@...gle.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, On Wed, Aug 12, 2015 at 8:45 PM, Martin KaFai Lau <kafai@...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@...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? > > 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. -- 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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