mirror of
https://github.com/edk2-porting/linux-next.git
synced 2024-12-23 04:34:11 +08:00
4db1fa6648
Remove duplicate word "for" in kselftest.txt. Signed-off-by: Zhiyi Sun <zhiyisun@msn.com> Signed-off-by: Jonathan Corbet <corbet@lwn.net>
86 lines
2.4 KiB
Plaintext
86 lines
2.4 KiB
Plaintext
Linux Kernel Selftests
|
|
|
|
The kernel contains a set of "self tests" under the tools/testing/selftests/
|
|
directory. These are intended to be small unit tests to exercise individual
|
|
code paths in the kernel.
|
|
|
|
On some systems, hot-plug tests could hang forever waiting for cpu and
|
|
memory to be ready to be offlined. A special hot-plug target is created
|
|
to run full range of hot-plug tests. In default mode, hot-plug tests run
|
|
in safe mode with a limited scope. In limited mode, cpu-hotplug test is
|
|
run on a single cpu as opposed to all hotplug capable cpus, and memory
|
|
hotplug test is run on 2% of hotplug capable memory instead of 10%.
|
|
|
|
Running the selftests (hotplug tests are run in limited mode)
|
|
=============================================================
|
|
|
|
To build the tests:
|
|
$ make -C tools/testing/selftests
|
|
|
|
|
|
To run the tests:
|
|
$ make -C tools/testing/selftests run_tests
|
|
|
|
To build and run the tests with a single command, use:
|
|
$ make kselftest
|
|
|
|
- note that some tests will require root privileges.
|
|
|
|
|
|
Running a subset of selftests
|
|
========================================
|
|
You can use the "TARGETS" variable on the make command line to specify
|
|
single test to run, or a list of tests to run.
|
|
|
|
To run only tests targeted for a single subsystem:
|
|
$ make -C tools/testing/selftests TARGETS=ptrace run_tests
|
|
|
|
You can specify multiple tests to build and run:
|
|
$ make TARGETS="size timers" kselftest
|
|
|
|
See the top-level tools/testing/selftests/Makefile for the list of all
|
|
possible targets.
|
|
|
|
|
|
Running the full range hotplug selftests
|
|
========================================
|
|
|
|
To build the hotplug tests:
|
|
$ make -C tools/testing/selftests hotplug
|
|
|
|
To run the hotplug tests:
|
|
$ make -C tools/testing/selftests run_hotplug
|
|
|
|
- note that some tests will require root privileges.
|
|
|
|
|
|
Install selftests
|
|
=================
|
|
|
|
You can use kselftest_install.sh tool installs selftests in default
|
|
location which is tools/testing/selftests/kselftest or an user specified
|
|
location.
|
|
|
|
To install selftests in default location:
|
|
$ cd tools/testing/selftests
|
|
$ ./kselftest_install.sh
|
|
|
|
To install selftests in an user specified location:
|
|
$ cd tools/testing/selftests
|
|
$ ./kselftest_install.sh install_dir
|
|
|
|
|
|
Contributing new tests
|
|
======================
|
|
|
|
In general, the rules for selftests are
|
|
|
|
* Do as much as you can if you're not root;
|
|
|
|
* Don't take too long;
|
|
|
|
* Don't break the build on any architecture, and
|
|
|
|
* Don't cause the top-level "make run_tests" to fail if your feature is
|
|
unconfigured.
|