Make mlock option as tunable.

src/cfg_file.h

@@ -280,6 +280,7 @@ struct config_file {
 	gsize max_statfile_size;						/**< maximum size for statfile							*/
 	guint32 statfile_sync_interval;					/**< synchronization interval							*/
 	guint32 statfile_sync_timeout;					/**< synchronization timeout							*/
+	gboolean mlock_statfile_pool;					/**< use mlock (2) for locking statfiles				*/
 
 	struct memcached_server memcached_servers[MAX_MEMCACHED_SERVERS];	/**< memcached servers				*/
 	gsize memcached_servers_num;					/**< number of memcached servers						*/

src/cfg_xml.c

@@ -318,6 +318,12 @@ static struct xml_parser_rule grammar[] = {
 				G_STRUCT_OFFSET (struct config_file, dynamic_conf),
 				NULL
 			},
+			{
+				"use_mlock",
+				xml_handle_boolean,
+				G_STRUCT_OFFSET (struct config_file, mlock_statfile_pool),
+				NULL
+			},
 			NULL_ATTR
 		},
 		NULL_DEF_ATTR

src/main.c

@@ -977,7 +977,7 @@ main (gint argc, gchar **argv, gchar **env)
 	setproctitle ("main process");
 
 	/* Init statfile pool */
-	rspamd_main->statfile_pool = statfile_pool_new (rspamd_main->server_pool, rspamd_main->cfg->max_statfile_size);
+	rspamd_main->statfile_pool = statfile_pool_new (rspamd_main->server_pool, rspamd_main->cfg->max_statfile_size, rspamd_main->cfg->mlock_statfile_pool);
 
 	event_init ();
 	g_mime_init (0);

src/statfile.c

@@ -205,7 +205,7 @@ statfile_pool_expire (statfile_pool_t * pool)
 }
 
 statfile_pool_t                *
-statfile_pool_new (memory_pool_t *pool, size_t max_size)
+statfile_pool_new (memory_pool_t *pool, size_t max_size, gboolean use_mlock)
 {
 	statfile_pool_t                *new;
 
@@ -214,7 +214,7 @@ statfile_pool_new (memory_pool_t *pool, size_t max_size)
 	new->max = max_size;
 	new->files = memory_pool_alloc0 (new->pool, STATFILES_MAX * sizeof (stat_file_t));
 	new->lock = memory_pool_get_mutex (new->pool);
-	new->mlock_ok = TRUE;
+	new->mlock_ok = use_mlock;
 
 	return new;
 }

src/statfile.h

@@ -106,7 +106,7 @@ struct statfile;
  * @param max_size maximum size
  * @return statfile pool object
  */
-statfile_pool_t* statfile_pool_new (memory_pool_t *pool, size_t max_size);
+statfile_pool_t* statfile_pool_new (memory_pool_t *pool, size_t max_size, gboolean use_mlock);
 
 /**
  * Open statfile and attach it to pool