X-Git-Url: http://git.annexia.org/?a=blobdiff_plain;f=src%2Fguestfs.pod;h=7f810f34e99ede58942969cb7009256dde4ce349;hb=8d70639e27c79ce88c1e61898536c17cd71258e7;hp=84eec6359caefec1c4287b06d77e25a97112213c;hpb=c0baa7bdb2b404e8c808700984b3fc1a699d8dd7;p=libguestfs.git

diff --git a/src/guestfs.pod b/src/guestfs.pod
index 84eec63..7f810f3 100644
--- a/src/guestfs.pod
+++ b/src/guestfs.pod
@@ -558,6 +558,15 @@ Note that in L<guestfish(3)> I<autosync is the default>.  So quick and
 dirty guestfish scripts that forget to sync will work just fine, which
 can make this extra-puzzling if you are trying to debug a problem.
 
+=item Mount option C<-o sync> should not be the default.
+
+If you use C<guestfs_mount>, then C<-o sync,noatime> are added
+implicitly.  However C<-o sync> does not add any reliability benefit,
+but does have a very large performance impact.
+
+The work around is to use C<guestfs_mount_options> and set the mount
+options that you actually want to use.
+
 =item Read-only should be the default.
 
 In L<guestfish(3)>, I<--ro> should be the default, and you should