---
 multipath/main.c |    4 ++++
 1 file changed, 4 insertions(+)

Index: multipath-tools/multipath/main.c
===================================================================
--- multipath-tools.orig/multipath/main.c
+++ multipath-tools/multipath/main.c
@@ -100,6 +100,7 @@ usage (char * progname)
 		"  -d      dry run, do not create or update devmaps\n" \
 		"  -r      force devmap reload\n" \
 		"  -p      policy failover|multibus|group_by_serial|group_by_prio\n" \
+		"  -n      nosync. disable synchronous device creation with udev\n" \
 		"  -b fil  bindings file location\n" \
 		"  -p pol  force all maps to specified path grouping policy :\n" \
 		"          . failover            one path per priority group\n" \
@@ -442,6 +443,9 @@ main (int argc, char *argv[])
 		case 'u':
 			conf->force_udev_rules = 1;
 			break;
+		case 'n':
+			dm_udev_set_sync_support(0);
+			break;
 		case 'h':
 			usage(argv[0]);
 		case ':':