_damon_sysfs.py assumes sysfs is mounted at /sys. In some systems, that might not be true. Find the mount point from /proc/mounts file content.
Signed-off-by: SeongJae Park sj@kernel.org --- tools/testing/selftests/damon/_damon_sysfs.py | 13 ++++++++++++- 1 file changed, 12 insertions(+), 1 deletion(-)
diff --git a/tools/testing/selftests/damon/_damon_sysfs.py b/tools/testing/selftests/damon/_damon_sysfs.py index fffa74a78bd7..5367e98817a9 100644 --- a/tools/testing/selftests/damon/_damon_sysfs.py +++ b/tools/testing/selftests/damon/_damon_sysfs.py @@ -2,7 +2,18 @@
import os
-sysfs_root = '/sys/kernel/mm/damon/admin' +ksft_skip=4 + +sysfs_root = None +with open('/proc/mounts', 'r') as f: + for line in f: + dev_name, mount_point, dev_fs = line.split()[:3] + if dev_fs == 'sysfs': + sysfs_root = '%s/kernel/mm/damon/admin' % mount_point + break +if sysfs_root is None: + print('Seems sysfs not mounted?') + exit(ksft_skip)
def write_file(path, string): "Returns error string if failed, or None otherwise"