From 96a61cbac335c2477b95fe796e562f30438a437b Mon Sep 17 00:00:00 2001
From: Arnaud ANDRE <aandre@evolix.fr>
Date: Fri, 22 Jan 2016 21:20:51 +0100
Subject: [PATCH] Prevent swapping by locking procress's virtual address space
 into RAM

---
 uvrrpd.c | 6 ++++++
 1 file changed, 6 insertions(+)

diff --git a/uvrrpd.c b/uvrrpd.c
index faea20a..7136fd8 100644
--- a/uvrrpd.c
+++ b/uvrrpd.c
@@ -24,6 +24,7 @@
 #include <unistd.h>
 #include <signal.h>
 #include <sys/file.h>
+#include <sys/mman.h>
 
 #include "uvrrpd.h"
 #include "vrrp.h"
@@ -125,6 +126,9 @@ int main(int argc, char *argv[])
 	/* pidfile */
 	pidfile(vrrp.vrid);
 
+	/* lock procress's virtual address space into RAM */
+	mlockall(MCL_CURRENT | MCL_FUTURE);
+
 	/* process */
 	set_bit(KEEP_GOING, &reg);
 	while (test_bit(KEEP_GOING, &reg) && !vrrp_process(&vrrp, &vnet));
@@ -148,6 +152,8 @@ int main(int argc, char *argv[])
 	ctrlfile_unlink();
 	free(pidfile_name);
 
+	munlockall();
+
 	return EXIT_SUCCESS;
 }