Hi,

On Wed, Aug 12, 2015 at 8:45 PM, Martin KaFai Lau [off-list ref] wrote:

On Mon, Aug 10, 2015 at 02:35:37PM -0400, Neal Cardwell wrote:

quoted

On Mon, Aug 10, 2015 at 2:10 PM, Jovi Zhangwei [off-list ref] wrote:

quoted

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.