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-rw-r--r--Documentation/dmatest.txt12
1 files changed, 12 insertions, 0 deletions
diff --git a/Documentation/dmatest.txt b/Documentation/dmatest.txt
index 9a90729bdee6..3e17b55a8ba3 100644
--- a/Documentation/dmatest.txt
+++ b/Documentation/dmatest.txt
@@ -36,6 +36,18 @@ in the original code.
Note that running a new test will stop any in progress test.
+The following command should return actual state of the test.
+ % cat /sys/kernel/debug/dmatest/run
+
+To wait for test done the user may perform a busy loop that checks the state.
+
+ % while [ $(cat /sys/kernel/debug/dmatest/run) = "Y" ]
+ > do
+ > echo -n "."
+ > sleep 1
+ > done
+ > echo
+
Part 3 - When built-in in the kernel...
The module parameters that is supplied to the kernel command line will be used

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