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| author | Shuah Khan <shuah.kh@samsung.com> | 2014-07-02 09:51:38 -0600 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2014-07-11 18:13:06 -0700 |
| commit | ddddda9bc41c9214731def8665ad92414356d685 (patch) | |
| tree | 59f328999b30f14b4f881fd02d3314c052041a46 /tools/testing/selftests/README.txt | |
| parent | 6e7e6c348492cb7e0a8a36a9d74d098de6f93208 (diff) | |
| download | lwn-ddddda9bc41c9214731def8665ad92414356d685.tar.gz lwn-ddddda9bc41c9214731def8665ad92414356d685.zip | |
tools: selftests - create a separate hotplug target for full range test
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%. In
addition to the above change, cpu-hotplug is chnged to change processor
affinity to cpu 0 so it doesn't impact itself while the test runs.
Signed-off-by: Shuah Khan <shuah.kh@samsung.com>
Cc: Kees Cook <keescook@chromium.org>
Cc: Michael Ellerman <michael@ellerman.id.au>
Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Cc: Frederic Weisbecker <fweisbec@gmail.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'tools/testing/selftests/README.txt')
| -rw-r--r-- | tools/testing/selftests/README.txt | 27 |
1 files changed, 23 insertions, 4 deletions
diff --git a/tools/testing/selftests/README.txt b/tools/testing/selftests/README.txt index 5e2faf9c55d3..2660d5ff9179 100644 --- a/tools/testing/selftests/README.txt +++ b/tools/testing/selftests/README.txt @@ -4,8 +4,15 @@ 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. -Running the selftests -===================== +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: @@ -18,14 +25,26 @@ To run the tests: - note that some tests will require root privileges. - -To run only tests targetted for a single subsystem: +To run only tests targeted for a single subsystem: (including +hotplug targets in limited mode) $ make -C tools/testing/selftests TARGETS=cpu-hotplug run_tests See the top-level tools/testing/selftests/Makefile for the list of all possible targets. +Running the full range hotplug selftests +======================================== + +To build the tests: + + $ make -C tools/testing/selftests hotplug + +To run the tests: + + $ make -C tools/testing/selftests run_hotplug + +- note that some tests will require root privileges. Contributing new tests ====================== |