From 1cba95f7234b4e31eb837fdaf7db962d9fe7a95a Mon Sep 17 00:00:00 2001
From: Shaun Ruffell <sruffell@digium.com>
Date: Thu, 5 Apr 2012 00:25:34 -0500
Subject: [PATCH] Lock all memory pages to prevent delays on incoming calls.

Internal-Issue-ID: DAHDI-241
Signed-off-by: Shaun Ruffell <sruffell@digium.com>
---
 main/asterisk.c |    8 ++++++--
 1 file changed, 6 insertions(+), 2 deletions(-)

diff --git a/main/asterisk.c b/main/asterisk.c
index f5f176b..d6457f5 100644
--- a/main/asterisk.c
+++ b/main/asterisk.c
@@ -101,6 +101,7 @@ int daemon(int, int);  /* defined in libresolv of all places */
 #endif
 
 #ifdef linux
+#include <sys/mman.h>
 #include <sys/prctl.h>
 #ifdef HAVE_CAP
 #include <sys/capability.h>
@@ -1581,9 +1582,12 @@ int ast_set_priority(int pri)
 		if (sched_setscheduler(0, SCHED_RR, &sched)) {
 			ast_log(LOG_WARNING, "Unable to set high priority\n");
 			return -1;
-		} else
-			if (option_verbose)
+		} else {
+			mlockall(MCL_FUTURE);
+			if (option_verbose) {
 				ast_verbose("Set to realtime thread\n");
+			}
+		}
 	} else {
 		sched.sched_priority = 0;
 		/* According to the manpage, these parameters can never fail. */
-- 
1.7.9.5