daemon: add support for mlockall

src/daemon/media-session.d/media-session.conf

@@ -2,6 +2,7 @@
 properties = {
     # Properties to configure the session and some
     # modules
+    #mem.mlock-all = false
 
 }
 

src/daemon/pipewire.conf.in

@@ -6,6 +6,7 @@ properties = {
     #link.max-buffers =		64
     link.max-buffers =		16		# version < 3 clients can't handle more
     #mem.allow-mlock =		true
+    #mem.mlock-all =		false
     #log.level =		2
 
     ## Properties for the DSP configuration

src/examples/media-session/media-session.c

@@ -2281,7 +2281,9 @@ int main(int argc, char *argv[])
 	pw_init(&argc, &argv);
 
 	impl.state_dir_fd = -1;
-	impl.this.props = pw_properties_new(NULL, NULL);
+	impl.this.props = pw_properties_new(
+			PW_KEY_CONTEXT_PROFILE_MODULES, "default,rtkit",
+			NULL);
 	if (impl.this.props == NULL)
 		return -1;
 
@@ -2326,9 +2328,7 @@ int main(int argc, char *argv[])
 	pw_loop_add_signal(impl.this.loop, SIGTERM, do_quit, &impl);
 
 	impl.this.context = pw_context_new(impl.this.loop,
-				pw_properties_new(
-					PW_KEY_CONTEXT_PROFILE_MODULES, "default,rtkit",
-					NULL),
+				pw_properties_copy(impl.this.props),
 				0);
 
 	if (impl.this.context == NULL)

src/pipewire/context.c

@@ -27,6 +27,7 @@
 #include <stdio.h>
 #include <regex.h>
 #include <limits.h>
+#include <sys/mman.h>
 
 #include <pipewire/log.h>
 
@@ -220,6 +221,13 @@ struct pw_context *pw_context_new(struct pw_loop *main_loop,
 		goto error_free;
 	}
 
+	if ((str = pw_properties_get(properties, "mem.mlock-all")) != NULL &&
+	    pw_properties_parse_bool(str)) {
+		if (mlockall(MCL_CURRENT | MCL_FUTURE) < 0)
+			pw_log_warn(NAME" %p: could not mlockall; %m", impl);
+		else
+			pw_log_info(NAME" %p: mlockall succeeded", impl);
+	}
 	this->properties = properties;
 
 	fill_defaults(this);