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Linus Torvalds
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Pull ftrace test code from Steven Rostedt: "This patch series starts a new selftests section in the tools/testing/selftest directory called "ftrace" that holds tests aimed at testing ftrace and subsystems that use ftrace (like kprobes). So far only a few tests were written (by Masami Hiramatsu), but more will be added in the near future (3.19)" * tag 'ftracetest-3.18' of git://git.kernel.org/pub/scm/linux/kernel/git/rostedt/linux-trace: tracing/kprobes: Add selftest scripts testing kprobe-tracer as startup test ftracetest: Add POSIX.3 standard and XFAIL result codes ftracetest: Add kprobe basic testcases ftracetest: Add ftrace basic testcases ftracetest: Initial commit for ftracetest
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 - note that some tests will require root privileges. 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 ====================== In general, the rules for 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.