docs: update tests docs

Signed-off-by: Karel Zak <kzak@redhat.com>

diff --git a/Documentation/howto-tests.txt b/Documentation/howto-tests.txt
index ca14b2b953a71aa826b58374a4596810f51d6b3b..fe91024b75fdcc867a7ff1bc2fe4f59fed0ee417 100644 (file)
--- a/Documentation/howto-tests.txt
+++ b/Documentation/howto-tests.txt
@@ -17,6 +17,13 @@
        # cd tests
        # ./run.sh [--verbose] [--memcheck]
 
+ note that as root you have to manually remove output and diff directories
+
+       # rm -rf output diff
+
+ or run 'make clean' as root.
+
+
  Run subset of tests:
 
        $ ./run.sh <test_directory-name>
@@ -30,5 +37,8 @@
 
  *** WARNING for root users ***
 
- The tests touch your /etc/fstab. Please, be careful and use
- these tests only for development and never on production system.
+ The tests touch your /etc/fstab, initialize loop devices or scsi_debug devices
+ if executed with root permissions.
+
+ Please, be careful and use these tests only for development and never on
+ production system.