When getting mount information for all filesystems, mount uses the

getfsstat(2) system call using the MNT_NOWAIT flag to indicate that
it wants to use the statfs information cached in the mount structure.
When the -v (verbose) flag is specified, we need to use the MNT_WAIT
flag to getfsstat(2) so that kernel will call VFS_STATFS to get the
current statfs statistics from each filesystem.

Sponsored by:	Netflix

sbin/mount/mount.c

@@ -329,7 +329,8 @@ main(int argc, char *argv[])
 	rval = 0;
 	switch (argc) {
 	case 0:
-		if ((mntsize = getmntinfo(&mntbuf, MNT_NOWAIT)) == 0)
+		if ((mntsize = getmntinfo(&mntbuf,
+		     verbose ? MNT_WAIT : MNT_NOWAIT)) == 0)
 			err(1, "getmntinfo");
 		if (all) {
 			while ((fs = getfsent()) != NULL) {