[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 nickm):

 I added a fixup commit for the issue to my branch.

 The changes to p/n_chan that I made above do seem like they might
 interfere with the channel_note_destroy_pending() mechanism, or they might
 not. I *think* not, but it needs consideration.  We'll need to test this
 as merged into 0.2.5 separately from how we test it in 0.2.4.

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Ticket URL: <https://trac.torproject.org/projects/tor/ticket/9683#comment:23>
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