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authorSeongJae Park <sj@kernel.org>2024-05-03 20:03:11 +0200
committerAndrew Morton <akpm@linux-foundation.org>2024-05-12 00:41:33 +0200
commite799fda6926ec01f8488023d4f891289996322aa (patch)
tree2de651cde2cbf7ab7d60706fd5812d06ca1fa954 /tools
parentselftests/damon/_damon_sysfs: check errors from nr_schemes file reads (diff)
downloadlinux-e799fda6926ec01f8488023d4f891289996322aa.tar.xz
linux-e799fda6926ec01f8488023d4f891289996322aa.zip
selftests/damon/_damon_sysfs: find sysfs mount point from /proc/mounts
_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. Link: https://lkml.kernel.org/r/20240503180318.72798-4-sj@kernel.org Signed-off-by: SeongJae Park <sj@kernel.org> Cc: Jonathan Corbet <corbet@lwn.net> Cc: Shuah Khan <shuah@kernel.org> Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Diffstat (limited to 'tools')
-rw-r--r--tools/testing/selftests/damon/_damon_sysfs.py13
1 files changed, 12 insertions, 1 deletions
diff --git a/tools/testing/selftests/damon/_damon_sysfs.py b/tools/testing/selftests/damon/_damon_sysfs.py
index 43239e5b38b2..9682e18dd450 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"