linux-kernel - Re: [PATCH linux-kselftest/test v4] Documentation: kunit: add documentation for kunit

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Date:   Tue, 19 Nov 2019 17:43:11 -0800
From:   Randy Dunlap <rdunlap@...radead.org>
To:     Brendan Higgins <brendanhiggins@...gle.com>, shuah@...nel.org,
        davidgow@...gle.com
Cc:     kunit-dev@...glegroups.com, linux-kernel@...r.kernel.org,
        linux-kselftest@...r.kernel.org, linux-doc@...r.kernel.org,
        corbet@....net, tytso@....edu
Subject: Re: [PATCH linux-kselftest/test v4] Documentation: kunit: add
 documentation for kunit_tool

On 11/19/19 5:17 PM, Brendan Higgins wrote:
> Add documentation for the Python script used to build, run, and collect
> results from the kernel known as kunit_tool. kunit_tool
> (tools/testing/kunit/kunit.py) was already added in previous commits.
> 
> Signed-off-by: Brendan Higgins <brendanhiggins@...gle.com>
> Reviewed-by: David Gow <davidgow@...gle.com>
> Cc: Randy Dunlap <rdunlap@...radead.org>

Acked-by: Randy Dunlap <rdunlap@...radead.org>

Thanks.

> ---
>  Documentation/dev-tools/kunit/index.rst      |  1 +
>  Documentation/dev-tools/kunit/kunit-tool.rst | 57 ++++++++++++++++++++
>  Documentation/dev-tools/kunit/start.rst      |  5 +-
>  3 files changed, 62 insertions(+), 1 deletion(-)
>  create mode 100644 Documentation/dev-tools/kunit/kunit-tool.rst
> 
> diff --git a/Documentation/dev-tools/kunit/index.rst b/Documentation/dev-tools/kunit/index.rst
> index 26ffb46bdf99d..c60d760a0eed1 100644
> --- a/Documentation/dev-tools/kunit/index.rst
> +++ b/Documentation/dev-tools/kunit/index.rst
> @@ -9,6 +9,7 @@ KUnit - Unit Testing for the Linux Kernel
>  
>  	start
>  	usage
> +	kunit-tool
>  	api/index
>  	faq
>  
> diff --git a/Documentation/dev-tools/kunit/kunit-tool.rst b/Documentation/dev-tools/kunit/kunit-tool.rst
> new file mode 100644
> index 0000000000000..50d46394e97e3
> --- /dev/null
> +++ b/Documentation/dev-tools/kunit/kunit-tool.rst
> @@ -0,0 +1,57 @@
> +.. SPDX-License-Identifier: GPL-2.0
> +
> +=================
> +kunit_tool How-To
> +=================
> +
> +What is kunit_tool?
> +===================
> +
> +kunit_tool is a script (``tools/testing/kunit/kunit.py``) that aids in building
> +the Linux kernel as UML (`User Mode Linux
> +<http://user-mode-linux.sourceforge.net/>`_), running KUnit tests, parsing
> +the test results and displaying them in a user friendly manner.
> +
> +What is a kunitconfig?
> +======================
> +
> +It's just a defconfig that kunit_tool looks for in the base directory.
> +kunit_tool uses it to generate a .config as you might expect. In addition, it
> +verifies that the generated .config contains the CONFIG options in the
> +kunitconfig; the reason it does this is so that it is easy to be sure that a
> +CONFIG that enables a test actually ends up in the .config.
> +
> +How do I use kunit_tool?
> +========================
> +
> +If a kunitconfig is present at the root directory, all you have to do is:
> +
> +.. code-block:: bash
> +
> +	./tools/testing/kunit/kunit.py run
> +
> +However, you most likely want to use it with the following options:
> +
> +.. code-block:: bash
> +
> +	./tools/testing/kunit/kunit.py run --timeout=30 --jobs=`nproc --all`
> +
> +- ``--timeout`` sets a maximum amount of time to allow tests to run.
> +- ``--jobs`` sets the number of threads to use to build the kernel.
> +
> +If you just want to use the defconfig that ships with the kernel, you can
> +append the ``--defconfig`` flag as well:
> +
> +.. code-block:: bash
> +
> +	./tools/testing/kunit/kunit.py run --timeout=30 --jobs=`nproc --all` --defconfig
> +
> +.. note::
> +	This command is particularly helpful for getting started because it
> +	just works. No kunitconfig needs to be present.
> +
> +For a list of all the flags supported by kunit_tool, you can run:
> +
> +.. code-block:: bash
> +
> +	./tools/testing/kunit/kunit.py run --help
> diff --git a/Documentation/dev-tools/kunit/start.rst b/Documentation/dev-tools/kunit/start.rst
> index aeeddfafeea20..f4d9a4fa914f8 100644
> --- a/Documentation/dev-tools/kunit/start.rst
> +++ b/Documentation/dev-tools/kunit/start.rst
> @@ -19,7 +19,10 @@ The wrapper can be run with:
>  
>  .. code-block:: bash
>  
> -   ./tools/testing/kunit/kunit.py run
> +	./tools/testing/kunit/kunit.py run --defconfig
> +
> +For more information on this wrapper (also called kunit_tool) checkout the
> +:doc:`kunit-tool` page.
>  
>  Creating a kunitconfig
>  ======================
> 


-- 
~Randy
Reported-by: Randy Dunlap <rdunlap@...radead.org>