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selftests/damon/sysfs.py: stop kdamonds before failing

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When an assertion is failed, sysfs.py DAMON selftest immediately exits the
test program leaving the DAMON running behind.  Many of the following
tests need to start DAMON on their own.  But because DAMON that was
started by sysfs.py is still running, those start attempts fail, and the
tests are failed or skipped.  Update sysfs.py to stop DAMON before exiting
the test program due to the assertion failure.

Link: https://lore.kernel.org/20260522154026.80546-12-sj@kernel.org
Signed-off-by: SeongJae Park <sj@kernel.org>
Cc: Brendan Higgins <brendan.higgins@linux.dev>
Cc: Shuah Khan <shuah@kernel.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
This commit is contained in:
SeongJae Park 2026-05-22 08:40:22 -07:00 committed by Andrew Morton
parent 2ceda82a15
commit ae819edb97
1 changed files with 4 additions and 0 deletions
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4
tools/testing/selftests/damon/sysfs.py
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@ -24,9 +24,12 @@ def dump_damon_status_dict(pid):
except Exception as e:
return None, 'json.load fail (%s)' % e
kdamonds = None
def fail(expectation, status):
print('unexpected %s' % expectation)
print(json.dumps(status, indent=4))
if kdamonds is not None:
kdamonds.stop()
exit(1)
def assert_true(condition, expectation, status):
@ -248,6 +251,7 @@ def assert_ctxs_committed(kdamonds):
ctx.pause = False
def main():
global kdamonds
kdamonds = _damon_sysfs.Kdamonds(
[_damon_sysfs.Kdamond(
contexts=[_damon_sysfs.DamonCtx(