[tor-bugs] #2756 [Tor Relay]: Send stream-level sendme when outbuf is low: don't wait for it to empty!

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#2756: Send stream-level sendme when outbuf is low: don't wait for it to empty!
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 Reporter:  nickm      |          Owner:                    
     Type:  defect     |         Status:  needs_review      
 Priority:  normal     |      Milestone:  Tor: 0.2.2.x-final
Component:  Tor Relay  |        Version:                    
 Keywords:             |         Parent:                    
   Points:             |   Actualpoints:                    
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Comment(by arma):

 The function header for connection_edge_consider_sending_sendme() needs to
 be edited too.

 I notice that connection_edge_flushed_some() and
 connection_edge_finished_flushing() both check about sending a sendme now.
 And they're called in basically the same places. The
 connection_edge_consider_sending_sendme() logic looks pretty light though,
 so I don't mind.

 Is the whole switch infrastructure needed in
 connection_edge_flushed_some()? We want to check about a sendme for all
 types of edge conns. I notice in connection_or_flushed_some() we don't
 check whether it's an OR conn.

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Ticket URL: <https://trac.torproject.org/projects/tor/ticket/2756#comment:2>
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