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Date: Tue, 30 Sep 2014 16:09:37 -0700 From: Rick Jones <rick.jones2@...com> To: netdev@...r.kernel.org Subject: Philosophical question: Is a UDP multicast datagram for which there is no socket match a drop or an ignore? I've been looking at some additional perf <mutter> -e skb_kfree_skb results, this time with a laptop connected to a corporate network with a large number of Windows systems sending out what they are wont to send... The laptop is just sitting there no active netperfs or anything :) I see profile hits for __udp4_lib_mcast_deliver() which has a kfree_skb() call which will happen if either there were no sockets found, or if an integral multiple of ARRAY_SIZE(stack) sockets are found. I'm assuming the latter is exceedingly rare. Anywho, the philosophical question - is such a situation a drop (indicating the existing kfree_skb()), or is it an ignore (indicating a consume_skb())? Should there be a statistic incremented for either of those? happy benchmarking, rick jones -- To unsubscribe from this list: send the line "unsubscribe netdev" in the body of a message to majordomo@...r.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html
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