kernel/tools/testing/selftests/damon/_damon_sysfs.py, branch linux-rolling-stable

selftests/damon/_damon_sysfs: support obsolete_target file

2025-11-17T01:28:24Z

A DAMON sysfs file, namely obsolete_target, has been newly introduced. Add a support of that file to _damon_sysfs.py so that DAMON selftests for the file can be easily written. Link: https://lkml.kernel.org/r/20251023012535.69625-7-sj@kernel.org Signed-off-by: SeongJae Park Cc: Bijan Tabatabai Cc: David Hildenbrand Cc: Jonathan Corbet Cc: Liam Howlett Cc: Lorenzo Stoakes Cc: Michal Hocko Cc: Mike Rapoport Cc: Shuah Khan Cc: Suren Baghdasaryan Cc: Vlastimil Babka Signed-off-by: Andrew Morton

selftests/damon/_damon_sysfs: use 2**32 - 1 as max nr_accesses and age

2025-07-26T22:08:18Z

nr_accesses and age are unsigned int. Use the proper max value. Link: https://lkml.kernel.org/r/20250720171652.92309-9-sj@kernel.org Signed-off-by: SeongJae Park Cc: Shuah Khan Signed-off-by: Andrew Morton

selftests/damon/_damon_sysfs: support DAMOS target_nid setup

2025-07-26T22:08:18Z

_damon_sysfs.py contains code for test-purpose DAMON sysfs interface control. Add support of DAMOS action destination target_nid setup for more tests. Link: https://lkml.kernel.org/r/20250720171652.92309-8-sj@kernel.org Signed-off-by: SeongJae Park Cc: Shuah Khan Signed-off-by: Andrew Morton

selftests/damon/_damon_sysfs: support DAMOS action dests setup

2025-07-26T22:08:17Z

_damon_sysfs.py contains code for test-purpose DAMON sysfs interface control. Add support of DAMOS action destinations setup for more tests. Link: https://lkml.kernel.org/r/20250720171652.92309-7-sj@kernel.org Signed-off-by: SeongJae Park Cc: Shuah Khan Signed-off-by: Andrew Morton

selftests/damon/_damon_sysfs: support DAMOS quota goal nid setup

2025-07-26T22:08:17Z

_damon_sysfs.py contains code for test-purpose DAMON sysfs interface control. Add support of DAMOS quota goal nid setup for more tests. Link: https://lkml.kernel.org/r/20250720171652.92309-6-sj@kernel.org Signed-off-by: SeongJae Park Cc: Shuah Khan Signed-off-by: Andrew Morton

selftests/damon/_damon_sysfs: support DAMOS quota weights setup

2025-07-26T22:08:17Z

_damon_sysfs.py contains code for test-purpose DAMON sysfs interface control. Add support of DAMOS quotas prioritization weights setup for more tests. Link: https://lkml.kernel.org/r/20250720171652.92309-5-sj@kernel.org Signed-off-by: SeongJae Park Cc: Shuah Khan Signed-off-by: Andrew Morton

selftests/damon/_damon_sysfs: support monitoring intervals goal setup

2025-07-26T22:08:17Z

_damon_sysfs.py contains code for test-purpose DAMON sysfs interface control. Add support of the monitoring intervals auto-tune goal setup for more tests. Link: https://lkml.kernel.org/r/20250720171652.92309-4-sj@kernel.org Signed-off-by: SeongJae Park Cc: Shuah Khan Signed-off-by: Andrew Morton

selftests/damon/_damon_sysfs: support DAMOS filters setup

2025-07-26T22:08:16Z

_damon_sysfs.py contains code for test-purpose DAMON sysfs interface control. Add support of DAMOS filters setup for more tests. Link: https://lkml.kernel.org/r/20250720171652.92309-3-sj@kernel.org Signed-off-by: SeongJae Park Cc: Shuah Khan Signed-off-by: Andrew Morton

selftests/damon/_damon_sysfs: support DAMOS watermarks setup

2025-07-26T22:08:16Z

Patch series "selftests/damon/sysfs.py: test all parameters". sysfs.py tests if DAMON sysfs interface is passing the user-requested parameters to DAMON as expected. But only the default (minimum) parameters are being tested. This is partially because _damon_sysfs.py, which is the library for making the parameter requests, is not supporting the entire parameters. The internal DAMON status dump script (drgn_dump_damon_status.py) is also not dumping entire parameters. Extend the test coverage by updating parameters input and status dumping scripts to support all parameters, and writing additional tests using those. This increased test coverage actually found one real bug (https://lore.kernel.org/20250719181932.72944-1-sj@kernel.org). First seven patches (1-7) extend _damon_sysfs.py for all parameters setup. The eight patch (8) fixes _damon_sysfs.py to use correct max nr_acceses and age values for their type. Following three patches (9-11) extend drgn_dump_damon_status.py to dump full DAMON parameters. Following nine patches (12-20) refactor sysfs.py for general testing code reuse, and extend it for full parameters check. Finally, two patches (21 and 22) add test cases in sysfs.py for full parameters testing. This patch (of 22): _damon_sysfs.py contains code for test-purpose DAMON sysfs interface control. Add support of DAMOS watermarks setup for more tests. Link: https://lkml.kernel.org/r/20250720171652.92309-1-sj@kernel.org Link: https://lkml.kernel.org/r/20250720171652.92309-2-sj@kernel.org Signed-off-by: SeongJae Park Cc: Shuah Khan Signed-off-by: Andrew Morton

selftests/damon/_damon_sysfs: set Kdamond.pid in start()

2025-07-13T23:38:20Z

_damon_sysfs.py is a Python module for reading and writing DAMON sysfs for testing. It is not reading resulting kdamond pids. Read and update those when starting kdamonds. Link: https://lkml.kernel.org/r/20250628160428.53115-3-sj@kernel.org Signed-off-by: SeongJae Park Cc: Shuah Khan Signed-off-by: Andrew Morton