kernel/linux.git/tools/testing/selftests/vm/run_vmtests, branch v4.2-rc2

Test compaction of mlocked memory

2015-05-26T21:58:06+00:00

Commit commit 5bbe3547aa3b ("mm: allow compaction of unevictable pages") introduced a sysctl that allows userspace to enable scanning of locked pages for compaction. This patch introduces a new test which fragments main memory and attempts to allocate a number of huge pages to exercise this compaction logic. Tested on machines with up to 32 GB RAM. With the patch a much larger number of huge pages can be allocated than on the kernel without the patch. Example output: On a machine with 16 GB RAM: sudo make run_tests vm ... ----------------------- running compaction_test ----------------------- No of huge pages allocated = 3834 [PASS] ... Signed-off-by: Sri Jayaramappa Cc: linux-kernel@vger.kernel.org Cc: linux-api@vger.kernel.org Cc: Andrew Morton Cc: Eric B Munson Reviewed-by: Eric B Munson Acked-by: Andrew Morton Signed-off-by: Shuah Khan

selftests: Introduce minimal shared logic for running tests

2015-03-13T21:13:40+00:00

This adds a Make include file which most selftests can then include to get the run_tests logic. On its own this has the advantage of some reduction in repetition, and also means the pass/fail message is defined in fewer places. However the key advantage is it will allow us to implement install very simply in a subsequent patch. The default implementation just executes each program in $(TEST_PROGS). We use a variable to hold the default implementation of $(RUN_TESTS) because that gives us a clean way to override it if necessary, ie. using override. The mount, memory-hotplug and mqueue tests use that to provide a different implementation. Tests are not run via /bin/bash, so if they are scripts they must be executable, we add a+x to several. Signed-off-by: Michael Ellerman Signed-off-by: Shuah Khan

selftests: add hugetlbfstest

2013-07-03T23:08:07+00:00

As the confusing naming indicates, this test has some overlap with pre-existing tests. Would be nice to merge them eventually. But since it is only test code, cleanliness is much less important than mere existence. Signed-off-by: Joern Engel Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds

selftests: exit 1 on failure

2013-07-03T23:08:07+00:00

In case this ever gets scripted, it should return 0 on success and 1 on failure. Parsing the output should be left to meatbags. Signed-off-by: Joern Engel Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds

tools/testing: fix comment / output typos

2012-09-01T15:48:19+00:00

Correct spelling typo in tools/testing Signed-off-by: Masanari Iida Signed-off-by: Jiri Kosina

mm: move hugepage test examples to tools/testing/selftests/vm

2012-03-29T00:14:37+00:00

hugepage-mmap.c, hugepage-shm.c and map_hugetlb.c in Documentation/vm are simple pass/fail tests, It's better to promote them to tools/testing/selftests. Thanks suggestion of Andrew Morton about this. They all need firstly setting up proper nr_hugepages and hugepage-mmap need to mount hugetlbfs. So I add a shell script run_vmtests to do such work which will call the three test programs and check the return value of them. Changes to original code including below: a. add run_vmtests script b. return error when read_bytes mismatch with writed bytes. c. coding style fixes: do not use assignment in if condition [akpm@linux-foundation.org: build the targets before trying to execute them] [akpm@linux-foundation.org: Documentation/vm/ no longer has a Makefile. Fixes "make clean"] Signed-off-by: Dave Young Cc: Wu Fengguang Cc: Christoph Lameter Cc: Pekka Enberg Cc: Frederic Weisbecker Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds