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