From a52818cc5633494992da7d1dc8fdb04b4a1b7c29 Mon Sep 17 00:00:00 2001
From: tecnovert <tecnovert@particl.io>
Date: Thu, 18 Jul 2019 13:04:16 +0200
Subject: [PATCH] net: Make poll in InterruptibleRecv only filter for POLLIN
 events. poll should block until there is data to be read or the timeout
 expires.

Filtering for the POLLOUT event causes poll to return immediately which leads to high CPU usage when trying to connect to non-responding peers through tor.

Removing POLLOUT matches how select is used when USE_POLL isn't defined.
---
 src/netbase.cpp | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/src/netbase.cpp b/src/netbase.cpp
index 53e5985a0f..6d4738c835 100644
--- a/src/netbase.cpp
+++ b/src/netbase.cpp
@@ -347,7 +347,7 @@ static IntrRecvError InterruptibleRecv(uint8_t* data, size_t len, int timeout, c
 #ifdef USE_POLL
                 struct pollfd pollfd = {};
                 pollfd.fd = hSocket;
-                pollfd.events = POLLIN | POLLOUT;
+                pollfd.events = POLLIN;
                 int nRet = poll(&pollfd, 1, timeout_ms);
 #else
                 struct timeval tval = MillisToTimeval(timeout_ms);