From 063c8ce7a0544e7fef58ddd19860e884689f149c 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.

Github-Pull: #16412
Rebased-From: a52818cc5633494992da7d1dc8fdb04b4a1b7c29
Tree-SHA512: eaf466630ba9d2a2a7443c9679c83c2cb13e779a5948f409cddb4c48cf32126ac68f3de48e394f9302e99858efa17cdb14650751a1b55c3b79e8a7507cab352d
---
 src/netbase.cpp | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/src/netbase.cpp b/src/netbase.cpp
index 6c386a9ade7..51e78d41fa2 100644
--- a/src/netbase.cpp
+++ b/src/netbase.cpp
@@ -268,7 +268,7 @@ 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);