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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 <sj@kernel.org> Cc: Shuah Khan <shuah@kernel.org> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> |
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