From: Willy Tarreau <w@1wt.eu>
Date: Sat, 10 Apr 2021 15:06:40 +0000 (+0200)
Subject: MINOR: epoll: move epoll_fd to read_mostly
X-Git-Tag: v2.4-dev17~157
X-Git-Url: http://git.ipfire.org/?a=commitdiff_plain;h=26d212c7442e93ca58f3fa75eab16141970a0729;p=thirdparty%2Fhaproxy.git

MINOR: epoll: move epoll_fd to read_mostly

This one only contains the list of per-thread epoll FDs, and is used
a lot during updates. Let's mark it read_mostly to avoid false sharing
of FDs placed at the extremities.
---

diff --git a/src/ev_epoll.c b/src/ev_epoll.c
index 506805f891..330c38c449 100644
--- a/src/ev_epoll.c
+++ b/src/ev_epoll.c
@@ -26,7 +26,7 @@
 
 /* private data */
 static THREAD_LOCAL struct epoll_event *epoll_events = NULL;
-static int epoll_fd[MAX_THREADS]; // per-thread epoll_fd
+static int epoll_fd[MAX_THREADS] __read_mostly; // per-thread epoll_fd
 
 #ifndef EPOLLRDHUP
 /* EPOLLRDHUP was defined late in libc, and it appeared in kernel 2.6.17 */