• Alessandro Rubini's avatar
    kernel/wr-nic: fix a memory leakage under heavy load · ce7eb8a2
    Alessandro Rubini authored
    When the switch is loaded, some PTP outgoing frames get discarded, so we
    never get back the timestamp interrupt.  By round-robin'ing the slots,
    we get back to the "busy" one, which holds an skb structure that must be
    Without this freeing, the skb remains in the output queue of the
    socket, and after a while we get EAGAIN in send() because the buffer
    is full (400 frames, more or less). And the ptp port is stuck until we
    reopen the socket.
    This diagnosis exposed the fact that it's not an overflow of pending
    descriptors, so I change the message from
      descriptor overflow: tx timestamp pending
      discarding tx frame that got no timestamp
    Finally, this is pr_warn, not pr_err as we now know it's expected.
    Signed-off-by: Alessandro Rubini's avatarAlessandro Rubini <rubini@gnudd.com>
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