note for linux users

tests/README.troubleshooting.md

@@ -4,6 +4,19 @@ If you have problems with running Piwik tests see below.
 
 If you cannot solve your issues please [ask in the forums](http://forum.piwik.org/list.php?9)
 
+
+## Important note for Linux users: fix for slow tests
+
+If the tests are running incredibly slow on your machine, maybe you are running mysql DB on an ext4 partition?
+Here is the tip that will save you hours of research: if you use Mysql on ext4 partition,
+make sure you add "nobarrier" option to /etc/fstab to disable some super slow IO feature.
+
+Change from:
+    `UUID=83237e54-445f-8b83-180f06459d46       /       ext4    errors=remount-ro     0       1`
+to this:
+    `UUID=83237e54-445f-8b83-180f06459d46       /       ext4    errors=remount-ro,nobarrier     0       1`
+
+
 ## Using latest GIT version
 On ubuntu to use the latest GIT:
 
@@ -32,15 +45,3 @@ On your dev server, give your user permissions to write to the directory:
     $ sudo chmod 777 -R piwik/tmp/
 
 **If you get the MySQL error number `2002`**, try changing the `[database_tests] host` config option to `"127.0.0.1"`.
-
-## Troubleshooting SLOW tests
-
-If the tests are running incredibly slow on your machine, maybe you are running mysql DB on an ext4 partition?
-Here is the tip that will save you hours of research: if you use Mysql on ext4 partition,
-make sure you add "nobarrier" option to /etc/fstab to disable some super slow IO feature.
-
-Change from:
-    `UUID=83237e54-445f-8b83-180f06459d46       /       ext4    errors=remount-ro     0       1`
-to this:
-    `UUID=83237e54-445f-8b83-180f06459d46       /       ext4    errors=remount-ro,nobarrier     0       1`
-