X-Git-Url: http://git.annexia.org/?a=blobdiff_plain;f=generator%2Fgenerator_actions.ml;h=1186c33c48bb75e0dc394993ad6ab24773b8c24c;hb=b408c0d5f484d42d128ff64b27e7bbdbbc81d452;hp=56976dda54d6ad1bf52662a99e8959633bc4d835;hpb=a711777bedcf64d814bb953ff8771858dbd7161b;p=libguestfs.git

diff --git a/generator/generator_actions.ml b/generator/generator_actions.ml
index 56976dd..1186c33 100644
--- a/generator/generator_actions.ml
+++ b/generator/generator_actions.ml
@@ -1821,7 +1821,12 @@ do not overwrite original.  Overrides C<AUG_SAVE_BACKUP>.
 
 =item C<AUG_TYPE_CHECK> = 4
 
-Typecheck lenses (can be expensive).
+Typecheck lenses.
+
+This option is only useful when debugging Augeas lenses.  Use
+of this option may require additional memory for the libguestfs
+appliance.  You may need to set the C<LIBGUESTFS_MEMSIZE>
+environment variable or call C<guestfs_set_memsize>.
 
 =item C<AUG_NO_STDINC> = 8
 
@@ -3001,6 +3006,10 @@ How many blocks are zeroed isn't specified (but it's I<not> enough
 to securely wipe the device).  It should be sufficient to remove
 any partition tables, filesystem superblocks and so on.
 
+If blocks are already zero, then this command avoids writing
+zeroes.  This prevents the underlying device from becoming non-sparse
+or growing unnecessarily.
+
 See also: C<guestfs_zero_device>, C<guestfs_scrub_device>,
 C<guestfs_is_zero_device>");
 
@@ -5224,7 +5233,11 @@ is not large enough.");
    "\
 This command writes zeroes over the entire C<device>.  Compare
 with C<guestfs_zero> which just zeroes the first few blocks of
-a device.");
+a device.
+
+If blocks are already zero, then this command avoids writing
+zeroes.  This prevents the underlying device from becoming non-sparse
+or growing unnecessarily.");
 
   ("txz_in", (RErr, [FileIn "tarball"; Pathname "directory"], []), 229, [Optional "xz"],
    [InitScratchFS, Always, TestOutput (