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IGMP processing is broken because the IPOIB does not set the skb->pkt_type the right way for multicast traffic. All incoming packets are set to PACKET_HOST which means that igmp_recv() will ignore the IGMP broadcasts/multicasts. This in turn means that the IGMP timers are firing and are sending information about multicast subscriptions unnecessarily. In a large private network this can cause traffic spikes. Signed-off-by: Christoph Lameter <cl@linux.com> Signed-off-by: Roland Dreier <rolandd@cisco.com> |
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