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Date: Sat, 25 May 2019 13:09:33 -0700 From: Fred Klassen <fklassen@...neta.com> To: Willem de Bruijn <willemdebruijn.kernel@...il.com> Cc: "David S. Miller" <davem@...emloft.net>, Alexey Kuznetsov <kuznet@....inr.ac.ru>, Hideaki YOSHIFUJI <yoshfuji@...ux-ipv6.org>, Shuah Khan <shuah@...nel.org>, Network Development <netdev@...r.kernel.org>, LKML <linux-kernel@...r.kernel.org>, linux-kselftest@...r.kernel.org, Willem de Bruijn <willemb@...gle.com> Subject: 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@...il.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.
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