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-rw-r--r--Documentation/trace/rv/index.rst1
-rw-r--r--Documentation/trace/rv/monitor_wwnr.rst45
2 files changed, 46 insertions, 0 deletions
diff --git a/Documentation/trace/rv/index.rst b/Documentation/trace/rv/index.rst
index 4cb71ed628b8..15fa966102c0 100644
--- a/Documentation/trace/rv/index.rst
+++ b/Documentation/trace/rv/index.rst
@@ -11,3 +11,4 @@ Runtime Verification
da_monitor_synthesis.rst
da_monitor_instrumentation.rst
monitor_wip.rst
+ monitor_wwnr.rst
diff --git a/Documentation/trace/rv/monitor_wwnr.rst b/Documentation/trace/rv/monitor_wwnr.rst
new file mode 100644
index 000000000000..80f1777b85aa
--- /dev/null
+++ b/Documentation/trace/rv/monitor_wwnr.rst
@@ -0,0 +1,45 @@
+Monitor wwnr
+============
+
+- Name: wwrn - wakeup while not running
+- Type: per-task deterministic automaton
+- Author: Daniel Bristot de Oliveira <bristot@kernel.org>
+
+Description
+-----------
+
+This is a per-task sample monitor, with the following
+definition::
+
+ |
+ |
+ v
+ wakeup +-------------+
+ +--------- | |
+ | | not_running |
+ +--------> | | <+
+ +-------------+ |
+ | |
+ | switch_in | switch_out
+ v |
+ +-------------+ |
+ | running | -+
+ +-------------+
+
+This model is borken, the reason is that a task can be running
+in the processor without being set as RUNNABLE. Think about a
+task about to sleep::
+
+ 1: set_current_state(TASK_UNINTERRUPTIBLE);
+ 2: schedule();
+
+And then imagine an IRQ happening in between the lines one and two,
+waking the task up. BOOM, the wakeup will happen while the task is
+running.
+
+- Why do we need this model, so?
+- To test the reactors.
+
+Specification
+-------------
+Grapviz Dot file in tools/verification/models/wwnr.dot