[tor-bugs] #9683 [Tor]: circuit_unlink_all_from_channel() is a performance bottleneck?

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#9683: circuit_unlink_all_from_channel() is a performance bottleneck?
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     Reporter:  arma    |      Owner:
         Type:  defect  |     Status:  needs_review
     Priority:  major   |  Milestone:  Tor: 0.2.5.x-final
    Component:  Tor     |    Version:
   Resolution:          |   Keywords:  tor-relay 024-backport
Actual Points:          |  Parent ID:
       Points:          |
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Comment (by andrea):

 I think it's safe to do this; we immediately exit handling any cells in
 relay.c if a circuit is marked for close - see
 append_cell_to_circuit_queue() and circuit_receive_relay_cell().  Probably
 best to patch circuit_mark_for_close() to null out n_chan/p_chan and test
 it a few days as a relay to see if it blows up, just to be sure.

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Ticket URL: <https://trac.torproject.org/projects/tor/ticket/9683#comment:15>
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