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diff --git a/kernel/scripts/rt-tester/t3-l1-pi-steal.tst b/kernel/scripts/rt-tester/t3-l1-pi-steal.tst
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+++ b/kernel/scripts/rt-tester/t3-l1-pi-steal.tst
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+#
+# rt-mutex test
+#
+# Op: C(ommand)/T(est)/W(ait)
+# | opcode
+# | | threadid: 0-7
+# | | | opcode argument
+# | | | |
+# C: lock: 0: 0
+#
+# Commands
+#
+# opcode opcode argument
+# schedother nice value
+# schedfifo priority
+# lock lock nr (0-7)
+# locknowait lock nr (0-7)
+# lockint lock nr (0-7)
+# lockintnowait lock nr (0-7)
+# lockcont lock nr (0-7)
+# unlock lock nr (0-7)
+# signal thread to signal (0-7)
+# reset 0
+# resetevent 0
+#
+# Tests / Wait
+#
+# opcode opcode argument
+#
+# prioeq priority
+# priolt priority
+# priogt priority
+# nprioeq normal priority
+# npriolt normal priority
+# npriogt normal priority
+# locked lock nr (0-7)
+# blocked lock nr (0-7)
+# blockedwake lock nr (0-7)
+# unlocked lock nr (0-7)
+# opcodeeq command opcode or number
+# opcodelt number
+# opcodegt number
+# eventeq number
+# eventgt number
+# eventlt number
+
+#
+# 3 threads 1 lock PI steal pending ownership
+#
+C: resetevent: 0: 0
+W: opcodeeq: 0: 0
+
+# Set schedulers
+C: schedother: 0: 0
+C: schedfifo: 1: 80
+C: schedfifo: 2: 81
+
+# T0 lock L0
+C: lock: 0: 0
+W: locked: 0: 0
+
+# T1 lock L0
+C: lock: 1: 0
+W: blocked: 1: 0
+T: prioeq: 0: 80
+
+# T0 unlock L0
+C: unlock: 0: 0
+
+# Wait until T1 is in the wakeup loop
+W: blockedwake: 1: 0
+T: priolt: 0: 1
+
+# T2 lock L0
+C: lock: 2: 0
+# T1 leave wakeup loop
+C: lockcont: 1: 0
+
+# T2 must have the lock and T1 must be blocked
+W: locked: 2: 0
+W: blocked: 1: 0
+
+# T2 unlock L0
+C: unlock: 2: 0
+
+# Wait until T1 is in the wakeup loop and let it run
+W: blockedwake: 1: 0
+C: lockcont: 1: 0
+W: locked: 1: 0
+C: unlock: 1: 0
+W: unlocked: 1: 0