[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):

 Replying to [comment:12 nickm]:
 > Okay, is this something that has a fix, or do we need a different
 approach for this patch?

 Not sure yet; need to check into whether there's actually any good reason
 for n_chan/p_chan to still be set after circuit_mark_for_close_() or it's
 just a historical accident.  If the latter, then the easy fix is to set
 them to NULL immediately after calling circuitmux_detach_circuit().

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Ticket URL: <https://trac.torproject.org/projects/tor/ticket/9683#comment:13>
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