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ac259c82a0
Waiting for replies to sent requests wasn't interruptible. This was preventing ctl-c from breaking out of mount when a server wasn't yet around to accept connections. The only complication was that the receive thread was accessing the sender's struct outside of the lock. An interrupted sender could remove their struct while receive was processing it. We rework recv processing so that it only uses the sender struct under the lock. This introduces a cpu copy of the payload but they're small and relatively infrequent control messages. Signed-off-by: Zach Brown <zab@versity.com>