kernel.git/tools/testing/selftests/damon, branch linux-6.10.y

selftests/damon/access_memory: use user-defined region size

2024-08-03T07:00:25Z

[ Upstream commit 34ec4344a5dabbb39e23e8daf30779892c0211a6 ] Patch series "selftests/damon: test DAMOS tried regions and {min,max}_nr_regions". This patch series fix a minor issue in a program for DAMON selftest, and implement new functionality selftests for DAMOS tried regions and {min,max}_nr_regions. The test for max_nr_regions also test the recovery from online tuning-caused limit violation, which was fixed by a previous patch [1] titled "mm/damon/core: merge regions aggressively when max_nr_regions is unmet". The first patch fixes a minor problem in the articial memory access pattern generator for tests. Following 3 patches (2-4) implement schemes tried regions test. Then a couple of patches (5-6) implementing static setup based {min,max}_nr_regions functionality test follows. Final two patches (7-8) implement dynamic max_nr_regions update test. [1] https://lore.kernel.org/20240624210650.53960C2BBFC@smtp.kernel.org This patch (of 8): 'access_memory' is an artificial memory access pattern generator for DAMON tests. It creates and accesses memory regions that the user specified the number and size via the command line. However, real access part of the program ignores the user-specified size of each region. Instead, it uses a hard-coded value, 10 MiB. Fix it to use user-defined size. Note that all existing 'access_memory' users are setting the region size as 10 MiB. Hence no real problem has happened so far. Link: https://lkml.kernel.org/r/20240625180538.73134-1-sj@kernel.org Link: https://lkml.kernel.org/r/20240625180538.73134-2-sj@kernel.org Fixes: b5906f5f7359 ("selftests/damon: add a test for update_schemes_tried_regions sysfs command") Signed-off-by: SeongJae Park Cc: Shuah Khan Signed-off-by: Andrew Morton Signed-off-by: Sasha Levin

selftests/damon: classify tests for functionalities and regressions

2024-05-11T22:41:34Z

DAMON selftests can be classified into two categories: functionalities and regressions. Functionality tests are for checking if the function is working as specified, while the regression tests are basically reproducers of previously reported and fixed bugs. The tests of the categories are mixed in the selftests Makefile. Separate those for easier understanding of the types of tests. Link: https://lkml.kernel.org/r/20240503180318.72798-6-sj@kernel.org Signed-off-by: SeongJae Park Cc: Jonathan Corbet Cc: Shuah Khan Signed-off-by: Andrew Morton

selftests/damon/_damon_sysfs: use 'is' instead of '==' for 'None'

2024-05-11T22:41:34Z

_damon_sysfs.py is using '==' or '!=' for 'None'. Since 'None' is a singleton, using 'is' or 'is not' is more efficient. Use the more efficient one. Link: https://lkml.kernel.org/r/20240503180318.72798-5-sj@kernel.org Signed-off-by: SeongJae Park Cc: Jonathan Corbet Cc: Shuah Khan Signed-off-by: Andrew Morton

selftests/damon/_damon_sysfs: find sysfs mount point from /proc/mounts

2024-05-11T22:41:33Z

_damon_sysfs.py assumes sysfs is mounted at /sys. In some systems, that might not be true. Find the mount point from /proc/mounts file content. Link: https://lkml.kernel.org/r/20240503180318.72798-4-sj@kernel.org Signed-off-by: SeongJae Park Cc: Jonathan Corbet Cc: Shuah Khan Signed-off-by: Andrew Morton

selftests/damon/_damon_sysfs: check errors from nr_schemes file reads

2024-05-11T22:41:33Z

DAMON context staging method in _damon_sysfs.py is not checking the returned error from nr_schemes file read. Check it. Link: https://lkml.kernel.org/r/20240503180318.72798-3-sj@kernel.org Fixes: f5f0e5a2bef9 ("selftests/damon/_damon_sysfs: implement kdamonds start function") Signed-off-by: SeongJae Park Cc: Jonathan Corbet Cc: Shuah Khan Signed-off-by: Andrew Morton

selftests/damon: add a test for DAMOS quota goal

2024-05-11T22:41:33Z

Add a selftest for DAMOS quota goal. It tests the feature by setting a user_input metric based goal, change the current feedback, and check if the effective quota size is increased and decreased as expected. Link: https://lkml.kernel.org/r/20240502172718.74166-3-sj@kernel.org Signed-off-by: SeongJae Park Cc: Shuah Khan Signed-off-by: Andrew Morton

selftests/damon/_damon_sysfs: support quota goals

2024-05-11T22:41:32Z

Patch series "selftests/damon: add DAMOS quota goal test". Extend DAMON selftest-purpose sysfs wrapper to support DAMOS quota goal, and implement a simple selftest for the feature using it. This patch (of 2): The DAMON sysfs test purpose wrapper, _damon_sysfs.py, is not supporting quota goals. Implement the support for testing the feature. The test will be implemented and added by the following commit. Link: https://lkml.kernel.org/r/20240502172718.74166-1-sj@kernel.org Link: https://lkml.kernel.org/r/20240502172718.74166-2-sj@kernel.org Signed-off-by: SeongJae Park Cc: Shuah Khan Signed-off-by: Andrew Morton

selftests: damon: add access_memory to .gitignore

2024-03-05T01:01:16Z

This binary is missing in the .gitignore and stays as an untracked file. Link: https://lore.kernel.org/r/20240214-damon_selftest_gitignore-v1-1-f517d0f9f783@gmail.com Link: https://lkml.kernel.org/r/20240221211148.46522-3-sj@kernel.org Signed-off-by: Javier Carrasco Singed-off-by: SeongJae Park Reported-by: Bernd Edlinger Closes: https://lore.kernel.org/all/AS8P193MB1285C963658008F1B2702AF7E4792@AS8P193MB1285.EURP193.PROD.OUTLOOK.COM/ Reviewed-by: SeongJae Park Cc: Vincenzo Mezzela Signed-off-by: Andrew Morton

selftest: damon: fix minor typos in test logs

2024-03-05T01:01:16Z

Patch series "selftests/damon: misc fixes". Misc fixes for DAMON selftets on behalf of the original authors. This patch (of 2): This patch resolves a spelling error in the test log, preventing potential confusion. It is submitted as part of my application to the "Linux Kernel Bug Fixing Spring Unpaid 2024" mentorship program of the Linux Foundation. Link: https://lore.kernel.org/r/20240204122523.14160-1-vincenzo.mezzela@gmail.com Link: https://lkml.kernel.org/r/20240221211148.46522-2-sj@kernel.org Signed-off-by: Vincenzo Mezzela Signed-off-by: SeongJae Park Reviewed-by: SeongJae Park Cc: Bernd Edlinger Cc: Javier Carrasco Signed-off-by: Andrew Morton

selftests/damon/_chk_dependency: get debugfs mount point from /proc/mounts

2024-02-22T18:24:57Z

DAMON debugfs selftests dependency checker assumes debugfs would be mounted at /sys/kernel/debug. That would be ok for many cases, but some systems might mounted the file system on some different places. Parse the real mount point using /proc/mounts file. Link: https://lkml.kernel.org/r/20240207203134.69976-9-sj@kernel.org Signed-off-by: SeongJae Park Cc: Shuah Khan Signed-off-by: Andrew Morton