Re: [PATCH net 1/4] net/udp_gso: Allow TX timestamp with UDP GSO

On May 23, 2019, at 2:59 PM, Willem de Bruijn willemdebruijn.kernel@gmail.com wrote: what exactly is the issue with IP_TOS?

If I understand correctly, the issue here is that the new 'P' option that polls on the error queue times out. This is unrelated to specifying TOS bits? Without zerocopy or timestamps, no message is expected on the error queue.

I was not able to get to the root cause, but I noticed that IP_TOS CMSG was lost until I applied this fix. I also found it confusing as to why that may be the case.