netdev - Re: Kernel panic eth2 mirred redirect to ifb0

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Date:	Sun, 19 Dec 2010 17:09:54 +0100
From:	Paweł Staszewski <pstaszewski@...are.pl>
To:	Eric Dumazet <eric.dumazet@...il.com>
CC:	Linux Network Development list <netdev@...r.kernel.org>
Subject: Re: Kernel panic eth2 mirred redirect to ifb0

W dniu 2010-12-19 16:43, Eric Dumazet pisze:
> Le dimanche 19 décembre 2010 à 12:35 +0100, Paweł Staszewski a écrit :
>> Hi all
>>
>> I have panic with kernel 2.6.37-rc6-git2 when use iproute2
>> mirred/redirect action
>>
>>
>> host1 (kernel 2.6.36.2)
>> netperf client ->  eth3 (82598EB 10-Gigabit AT CX4) - directly connected
>> to eth2 of host2
>> ethtool -k eth3
>> Offload parameters for eth3:
>> rx-checksumming: on
>> tx-checksumming: on
>> scatter-gather: on
>> tcp-segmentation-offload: on
>> udp-fragmentation-offload: off
>> generic-segmentation-offload: on
>> generic-receive-offload: on
>> large-receive-offload: off
>> rx-vlan-offload: off
>> tx-vlan-offload: off
>> ntuple-filters: off
>> receive-hashing: off
>>
>> ethtool -i eth3
>> driver: ixgbe
>> version: 2.0.84-k2
>> firmware-version: 1.12-2
>> bus-info: 0000:03:00.1
>>
>>
>> host2 (kernel-2.6.37-rc6-git2)
>> netserver ->  eth2 (82598EB 10-Gigabit AT CX4) - directly connected to
>> eth3 of host1
>>
>> ethtool -k eth2
>> Offload parameters for eth2:
>> rx-checksumming: on
>> tx-checksumming: on
>> scatter-gather: on
>> tcp-segmentation-offload: on
>> udp-fragmentation-offload: off
>> generic-segmentation-offload: on
>> generic-receive-offload: on
>> large-receive-offload: off
>> rx-vlan-offload: on
>> tx-vlan-offload: on
>> ntuple-filters: off
>> receive-hashing: off
>>
>> ethtool -i eth2
>> driver: ixgbe
>> version: 2.0.84-k2
>> firmware-version: 1.12-2
>> bus-info: 0000:03:00.0
>>
>>
>>
>> Normally without ifb and redirect netperf show:
>> TCP STREAM TEST from 0.0.0.0 (0.0.0.0) port 0 AF_INET to 192.168.0.2
>> (192.168.0.2) port 0 AF_INET
>> Recv   Send    Send
>> Socket Socket  Message  Elapsed
>> Size   Size    Size     Time     Throughput
>> bytes  bytes   bytes    secs.    10^6bits/sec
>>
>>    87380  16384  16384    10.00    9042.14
>>
>>
>> Steps to reproduce panic:
>> ip link set dev ifb0 up
>>
>> tc qdisc add dev eth2 ingress
>>
>> tc filter add dev eth2 parent ffff: protocol ip prio 10 u32 \
>> match ip src 0.0.0.0/0 flowid 1:1 \
>> action mirred egress redirect dev ifb0
>>
>>
>> After this when i start netperf on host1 I have panic (screenshot in
>> attached image).
> Unfortunately, we miss the start of panic messages. Could you try to get
> them ?
>
In attached images

Regards
Pawel

>
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