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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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