contrib: Note about what needs to be done for visualization.

diff --git a/contrib/visualize-alignment/README b/contrib/visualize-alignment/README
index 0009dcf..6c30f94 100644 (file)
--- a/contrib/visualize-alignment/README
+++ b/contrib/visualize-alignment/README
@@ -8,6 +8,12 @@ such as a single write, or groups of operations.  You can examine the
 traces by hand (as text files) or turn them into graphical
 visualizations.
 
 traces by hand (as text files) or turn them into graphical
 visualizations.
 

+IMPORTANT NOTE: This is not upstream (in qemu) nor integrated into
+libguestfs.  We should probably be using the 'blktrace' command
+instead, or if that is not suitable, get a more reliable and useful
+trace mechanism added to qemu (the current patch is not suitable for
+upstreaming).
+

 The *.qtr files are qemu trace files, produced using the unofficial
 qemu patch in the current directory.
 
 The *.qtr files are qemu trace files, produced using the unofficial
 qemu patch in the current directory.