X-Git-Url: http://git.annexia.org/?a=blobdiff_plain;f=contrib%2Fvisualize-alignment%2FREADME;h=e68a9023a76c1c8113e09ce4464dcf6ac7b3d9ec;hb=1e35941f62bddafd6b88270b22b3afe4a5d37baa;hp=0009dcf84e8edef1690aef3da96ad1f767f7b2f5;hpb=241c34fb7acff24713331f015429eb52055553a6;p=libguestfs.git

diff --git a/contrib/visualize-alignment/README b/contrib/visualize-alignment/README
index 0009dcf..e68a902 100644
--- 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.
 
+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.
 
@@ -48,7 +54,7 @@ qemu patch in the current directory.
       pvcreate /dev/vda : \
       vgcreate VG /dev/vda : \
       lvcreate LV VG 32 : \
-      mkfs-b ext4 4096 /dev/VG/LV
+      mkfs-opts ext4 /dev/VG/LV blocksize:4096
 
   Some points to note:
     * an ext4 filesystem, so it has a journal and extents