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([110.9.142.4]) by smtp.gmail.com with ESMTPSA id d9443c01a7336-241d1f101e1sm248908915ad.58.2025.08.10.05.44.29 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Sun, 10 Aug 2025 05:44:31 -0700 (PDT) From: Sang-Heon Jeon To: sj@kernel.org, honggyu.kim@sk.com Cc: damon@lists.linux.dev, linux-mm@kvack.org, Sang-Heon Jeon Subject: [PATCH v3] selftests/damon: test no-op commit broke DAMON status Date: Sun, 10 Aug 2025 21:43:54 +0900 Message-ID: <20250810124354.16456-1-ekffu200098@gmail.com> X-Mailer: git-send-email 2.43.0 MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-Rspamd-Server: rspam12 X-Rspamd-Queue-Id: 000981C0003 X-Stat-Signature: gccrfegcszh1eu49qg687whez3pi1gok X-Rspam-User: X-HE-Tag: 1754829872-526202 X-HE-Meta: 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 eqxhozXt gyJ/Fpncu86+SwJumuHhW6J4dEo4UUFaifrn+lVv1BVuL4TStfxoHjT3AO63qhXj/V1S6ApwAfZy4lIRdoOQExvRqAZt6/5phXOM9KhoqJo/EXo7SzML/O0LY/g0ShByf4FYnx4/qUUzN0bLQ5RyjyWjfUz/tfa0AhgA5GHk9/WybzZDJDTeIYwTglWcefuKPW6cQWhDiFOSMvej/nCsqNiaLSW6KveUZu0s775UUiM+Nlo8NmqQvNkrgCnjwGms6/S+Xjmxlnkx3IxnxQc60xjWDxMpZkcpu4+HCqpY+iYz+PWvJpceXaCEkkBzybIEk0TN330Z51rCr2v/d0/EI+0OeauQA9HIZWKJ3w/+pIbVb2gbRBKfJCk4W/ZvhRnWUoINC1I4h+7MYgE+hIQyN5U3GAA== X-Bogosity: Ham, tests=bogofilter, spamicity=0.000000, version=1.2.4 Sender: owner-linux-mm@kvack.org Precedence: bulk X-Loop: owner-majordomo@kvack.org List-ID: List-Subscribe: List-Unsubscribe: Add test to verify that DAMON status is not changed after a no-op commit. Signed-off-by: Sang-Heon Jeon --- tools/testing/selftests/damon/Makefile | 1 + .../damon/sysfs_no_op_commit_break.py | 72 +++++++++++++++++++ 2 files changed, 73 insertions(+) create mode 100755 tools/testing/selftests/damon/sysfs_no_op_commit_break.py diff --git a/tools/testing/selftests/damon/Makefile b/tools/testing/selftests/damon/Makefile index 5b230deb19e8..44a4a819df55 100644 --- a/tools/testing/selftests/damon/Makefile +++ b/tools/testing/selftests/damon/Makefile @@ -17,6 +17,7 @@ TEST_PROGS += reclaim.sh lru_sort.sh TEST_PROGS += sysfs_update_removed_scheme_dir.sh TEST_PROGS += sysfs_update_schemes_tried_regions_hang.py TEST_PROGS += sysfs_memcg_path_leak.sh +TEST_PROGS += sysfs_no_op_commit_break.py EXTRA_CLEAN = __pycache__ diff --git a/tools/testing/selftests/damon/sysfs_no_op_commit_break.py b/tools/testing/selftests/damon/sysfs_no_op_commit_break.py new file mode 100755 index 000000000000..f557587ebc81 --- /dev/null +++ b/tools/testing/selftests/damon/sysfs_no_op_commit_break.py @@ -0,0 +1,72 @@ +#!/usr/bin/env python3 +# SPDX-License-Identifier: GPL-2.0 + +import json +import os +import subprocess +import sys + +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'], + stderr=subprocess.DEVNULL) + + if rc != 0: + return None, f'drgn fail: return code({rc})' + try: + with open('damon_dump_output', 'r') as f: + return json.load(f), None + except Exception as e: + return None, 'json.load fail (%s)' % e + +def main(): + kdamonds = _damon_sysfs.Kdamonds( + [_damon_sysfs.Kdamond( + contexts=[_damon_sysfs.DamonCtx( + schemes=[_damon_sysfs.Damos( + ops_filters=[ + _damon_sysfs.DamosFilter( + type_='anon', + matching=True, + allow=True, + ) + ] + )], + )])] + ) + + err = kdamonds.start() + if err is not None: + print('kdamond start failed: %s' % err) + exit(1) + + before_commit_status, err = \ + dump_damon_status_dict(kdamonds.kdamonds[0].pid) + if err is not None: + print('before-commit status dump failed: %s' % err) + exit(1) + + kdamonds.kdamonds[0].commit() + + after_commit_status, err = \ + dump_damon_status_dict(kdamonds.kdamonds[0].pid) + if err is not None: + print('after-commit status dump failed: %s' % err) + exit(1) + + if before_commit_status != after_commit_status: + print(f'before: {json.dump(before_commit_status, indent=2)}') + print(f'after: {json.dump(after_commit_status, indent=2)}') + exit(1) + + kdamonds.stop() + +if __name__ == '__main__': + main() -- 2.43.0