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From: Kirk McKusick <mckusick@FreeBSD.org>
Date: Tue, 7 Aug 2018 21:17:45 +0000 (UTC)
To: src-committers@freebsd.org, svn-src-all@freebsd.org,
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Subject: svn commit: r337437 - head/sbin/mount
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Author: mckusick
Date: Tue Aug  7 21:17:45 2018
New Revision: 337437
URL: https://svnweb.freebsd.org/changeset/base/337437

Log:
  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

Modified:
  head/sbin/mount/mount.c

Modified: head/sbin/mount/mount.c
==============================================================================
--- head/sbin/mount/mount.c	Tue Aug  7 20:43:50 2018	(r337436)
+++ head/sbin/mount/mount.c	Tue Aug  7 21:17:45 2018	(r337437)
@@ -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) {