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selftests/damon/sysfs.py: stop DAMON for dumping failures

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Commit 4ece018976 ("selftests/damon: add python and drgn-based DAMON
sysfs test") in mm-stable tree introduced sysfs.py that runs drgn for
dumping DAMON status.  When the DAMON status dumping fails for reasons
including drgn uninstalled environment, the test fails without stopping
DAMON.  Following DAMON selftests that assumes DAMON is not running when
they executed therefore fail.  Catch dumping failures and stop DAMON for
that case.

Link: https://lkml.kernel.org/r/20250722060330.56068-1-sj@kernel.org
Fixes: 4ece018976 ("selftests/damon: add python and drgn-based DAMON sysfs test")
Signed-off-by: SeongJae Park <sj@kernel.org>
Reported-by: kernel test robot <oliver.sang@intel.com>
Closes: https://lore.kernel.org/oe-lkp/202507220707.9c5d6247-lkp@intel.com
Cc: Shuah Khan <shuah@kernel.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
This commit is contained in:
SeongJae Park 2025-07-21 23:03:30 -07:00 committed by Andrew Morton
parent 45cd52c44e
commit cf20cb9ad1
1 changed files with 5 additions and 0 deletions
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5
tools/testing/selftests/damon/sysfs.py
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@ -8,6 +8,10 @@ import subprocess
import _damon_sysfs
def dump_damon_status_dict(pid):
try:
subprocess.check_output(['which', 'drgn'], stderr=subprocess.DEVNULL)
except:
return None, 'drgn not found'
file_dir = os.path.dirname(os.path.abspath(__file__))
dump_script = os.path.join(file_dir, 'drgn_dump_damon_status.py')
rc = subprocess.call(['drgn', dump_script, pid, 'damon_dump_output'],
@ -40,6 +44,7 @@ def main():
status, err = dump_damon_status_dict(kdamonds.kdamonds[0].pid)
if err is not None:
print(err)
kdamonds.stop()
exit(1)
if len(status['contexts']) != 1: