Merge pull request #1972 from ZcashFoundation/peer-set-demand-deadlock-doc
Document peer set deadlock resistance
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@ -462,8 +462,14 @@ where
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self.update_metrics();
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if self.preselected_p2c_index.is_none() {
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// CORRECTNESS
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//
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// If the channel is full, drop the demand signal rather than waiting.
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// If we waited here, the crawler could deadlock sending a request to
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// fetch more peers, because it also empties the channel.
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trace!("no ready services, sending demand signal");
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let _ = self.demand_signal.try_send(());
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// CORRECTNESS
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//
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// The current task must be scheduled for wakeup every time we
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