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    SubjectRe: [PATCH v4 4/5] skb: add tracepoints to freeing skb
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    From: Koki Sanagi <sanagi.koki@jp.fujitsu.com>
    Date: Mon, 23 Aug 2010 18:46:12 +0900

    > This patch adds tracepoint to consume_skb and add trace_kfree_skb before
    > __kfree_skb in skb_free_datagram_locked and net_tx_action.
    > Combinating with tracepoint on dev_hard_start_xmit, we can check how long it
    > takes to free transmited packets. And using it, we can calculate how many
    > packets driver had at that time. It is useful when a drop of transmited packet
    > is a problem.
    >
    > sshd-6828 [000] 112689.258154: consume_skb: skbaddr=f2d99bb8
    >
    > Signed-off-by: Koki Sanagi <sanagi.koki@jp.fujitsu.com>

    Acked-by: David S. Miller <davem@davemloft.net>


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