From a219343fcdc93d91d4e102abc746db68bf45b4ff Mon Sep 17 00:00:00 2001
From: Steffen Vogel <post@steffenvogel.de>
Date: Mon, 14 Aug 2017 14:29:23 +0200
Subject: [PATCH] rt: lock all memory by default
---
lib/kernel/rt.c | 16 ++++++++++++++++
1 file changed, 16 insertions(+)
diff --git a/lib/kernel/rt.c b/lib/kernel/rt.c
index d296cbde0..8675c90df 100644
--- a/lib/kernel/rt.c
+++ b/lib/kernel/rt.c
@@ -22,6 +22,7 @@
#include <sched.h>
#include <unistd.h>
+#include <sys/mman.h>
#include "config.h"
#include "utils.h"
@@ -52,6 +53,8 @@ int rt_init(int priority, int affinity)
rt_set_affinity(affinity);
else
warn("You might want to use the 'affinity' setting to pin VILLASnode to dedicate CPU cores");
+
+ rt_lock_memory();
#else
warn("This platform is not optimized for real-time execution");
#endif
@@ -62,6 +65,19 @@ int rt_init(int priority, int affinity)
#ifdef __linux__
+int rt_lock_memory()
+{
+ int ret;
+
+#ifdef _POSIX_MEMLOCK
+ ret = mlockall(MCL_CURRENT | MCL_FUTURE);
+ if (ret)
+ error("Failed to lock memory");
+#endif
+
+ return 0;
+}
+
int rt_set_affinity(int affinity)
{
char isolcpus[255];