netdev - Re: [PATCH net] net: sched: Remove TCA

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Date:   Fri, 26 Oct 2018 09:48:25 -0600
From:   David Ahern <dsahern@...il.com>
To:     Marco Berizzi <pupilla@...ero.it>, David Ahern <dsahern@...nel.org>
Cc:     davem@...emloft.net, netdev@...r.kernel.org
Subject: Re: [PATCH net] net: sched: Remove TCA_OPTIONS from policy

On 10/26/18 5:34 AM, Marco Berizzi wrote:
> Apologies for bothering you again.
> I applied your patch to 4.19, but after issuing this
> command:
> 
> root@...imero:~# tc qdisc add dev eth0 root handle 1:0 hfsc default 1
> root@...imero:~# ping 10.81.104.1
> PING 10.81.104.1 (10.81.104.1) 56(84) bytes of data.
> ^C
> --- 10.81.104.1 ping statistics ---
> 2 packets transmitted, 0 received, 100% packet loss, time 1001ms
> 
> I'm losing ipv4 connectivity.
> If I remove the qdisc everything is going to work again:
> 
> root@...imero:~# tc qdisc del dev eth0 root                   
> root@...imero:~# ping 10.81.104.1
> PING 10.81.104.1 (10.81.104.1) 56(84) bytes of data.
> 64 bytes from 10.81.104.1: icmp_seq=1 ttl=255 time=0.711 ms
> ^C
> --- 10.81.104.1 ping statistics ---
> 1 packets transmitted, 1 received, 0% packet loss, time 0ms
> rtt min/avg/max/mdev = 0.711/0.711/0.711/0.000 ms
> 

I backed up to 95278ddaa15cfa23e4a06ee9ed7b6ee0197c500b which is the
commit before the validation patch and it does not work there.

Can you bisect and find out when it stopped working?