From: "Joel Fernandes (Google)" <>

Here is test code and kselftest for testing the preemptoff and irqsoff
tracers. I am posting it separately just for early feedback since its
the first time I'm writing a kselftest.

I am planning to include these tests in the next series posting of
"Centralize and unify usage of preempt/irq tracepoints" [1]

By the way, other than these I have also completed testing with Ingo's
locking API test suite for [1]. I will include these and other results
in the v7 posting of [1].


Joel Fernandes (Google) (2):
  lib: Add module to simulate atomic sections for testing
    {preempt,irqs}off tracers
  kselftests: ftrace: Add tests for the preemptoff and irqsoff tracers

 lib/Kconfig.debug                             |  9 +++
 lib/Makefile                                  |  1 +
 lib/test_atomic_sections.c                    | 80 +++++++++++++++++++
 tools/testing/selftests/ftrace/config         |  3 +
 .../test.d/preemptirq/       | 74 +++++++++++++++++
 5 files changed, 167 insertions(+)
 create mode 100644 lib/test_atomic_sections.c
 create mode 100644 

Cc: Steven Rostedt <>
Cc: Peter Zilstra <>
Cc: Ingo Molnar <>
Cc: Mathieu Desnoyers <>
Cc: Tom Zanussi <>
Cc: Namhyung Kim <>
Cc: Thomas Glexiner <>
Cc: Boqun Feng <>
Cc: Paul McKenney <>
Cc: Masami Hiramatsu <>
Cc: Todd Kjos <>
Cc: Erick Reyes <>
Cc: Julia Cartwright <>
Signed-off-by: Joel Fernandes (Google) <>


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