+=head2 guestfs_drop_caches
+
+ int guestfs_drop_caches (guestfs_h *handle,
+ int whattodrop);
+
+This instructs the guest kernel to drop its page cache,
+and/or dentries and inode caches. The parameter C<whattodrop>
+tells the kernel what precisely to drop, see
+L<http://linux-mm.org/Drop_Caches>
+
+Setting C<whattodrop> to 3 should drop everything.
+
+This automatically calls L<sync(2)> before the operation,
+so that the maximum guest memory is freed.
+
+This function returns 0 on success or -1 on error.
+
+=head2 guestfs_end_busy
+
+ int guestfs_end_busy (guestfs_h *handle);
+
+This sets the state to C<READY>, or if in C<CONFIG> then it leaves the
+state as is. This is only used when implementing
+actions using the low-level API.
+
+For more information on states, see L<guestfs(3)>.
+
+This function returns 0 on success or -1 on error.
+
+=head2 guestfs_equal
+
+ int guestfs_equal (guestfs_h *handle,
+ const char *file1,
+ const char *file2);
+
+This compares the two files C<file1> and C<file2> and returns
+true if their content is exactly equal, or false otherwise.
+
+The external L<cmp(1)> program is used for the comparison.
+
+This function returns a C truth value on success or -1 on error.
+