X-Git-Url: http://git.annexia.org/?p=libguestfs.git;a=blobdiff_plain;f=examples%2Fguestfs-testing.pod;fp=examples%2Fguestfs-testing.pod;h=c35c3b86698a12e787336f0ecd4f120965386d48;hp=adf5b04d11dbc05539778a5eb1ed14c9de4b2dbe;hb=7b3137e664c3f4edf6ac7043a34c4166567e17bd;hpb=ce6c4eeabe3f2ce96d11d6d55c3ac6aca542d4c8

diff --git a/examples/guestfs-testing.pod b/examples/guestfs-testing.pod
index adf5b04..c35c3b8 100644
--- a/examples/guestfs-testing.pod
+++ b/examples/guestfs-testing.pod
@@ -102,7 +102,29 @@ L<virt-df(1)> lists disk space.  Run:
 
  virt-df
 
-Do the results match what's reported inside the guests?
+You can try comparing this to the results from L<df(1)> inside the
+guest, but there are some provisos:
+
+=over 4
+
+=item *
+
+The guest must be idle.
+
+=item *
+
+The guest disks must be synched using L<sync(1)>.
+
+=item *
+
+Any action such as booting the guest will write log files causing the
+numbers to change.
+
+=back
+
+We don't guarantee that the numbers will be identical even under these
+circumstances.  They should be similar.  It would indicate a bug if
+you saw greatly differing numbers.
 
 =head2 Try importing virt-df CSV output into a spreadsheet or database.