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authorSeongJae Park <sj@kernel.org>2023-12-12 22:48:10 +0300
committerAndrew Morton <akpm@linux-foundation.org>2023-12-21 01:48:13 +0300
commite3898efaffdb8e78639e68e997e3b8b6d0ed4ebc (patch)
tree903e652321fffd936601d9f7c8682e1e0e260925 /tools
parentb5906f5f7359f561c5915dc146ced1bc2733401c (diff)
downloadlinux-e3898efaffdb8e78639e68e997e3b8b6d0ed4ebc.tar.xz
selftests/damon: add a test for update_schemes_tried_regions hang bug
Add a test for reproducing the update_schemes_tried_{regions,bytes} command-causing indefinite hang bug that fixed by commit 7d6fa31a2fd7 ("mm/damon/sysfs-schemes: add timeout for update_schemes_tried_regions"), to avoid mistakenly re-introducing the bug. Refer to the fix commit for more details of the bug. Link: https://lkml.kernel.org/r/20231212194810.54457-6-sj@kernel.org Signed-off-by: SeongJae Park <sj@kernel.org> 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/Makefile1
-rw-r--r--tools/testing/selftests/damon/sysfs_update_schemes_tried_regions_hang.py33
2 files changed, 34 insertions, 0 deletions
diff --git a/tools/testing/selftests/damon/Makefile b/tools/testing/selftests/damon/Makefile
index 90ffafc42c5e..8a1cc2bf1864 100644
--- a/tools/testing/selftests/damon/Makefile
+++ b/tools/testing/selftests/damon/Makefile
@@ -10,6 +10,7 @@ TEST_PROGS += debugfs_empty_targets.sh debugfs_huge_count_read_write.sh
TEST_PROGS += debugfs_duplicate_context_creation.sh
TEST_PROGS += debugfs_rm_non_contexts.sh
TEST_PROGS += sysfs.sh sysfs_update_removed_scheme_dir.sh
+TEST_PROGS += sysfs_update_schemes_tried_regions_hang.py
TEST_PROGS += sysfs_update_schemes_tried_regions_wss_estimation.py
TEST_PROGS += reclaim.sh lru_sort.sh
diff --git a/tools/testing/selftests/damon/sysfs_update_schemes_tried_regions_hang.py b/tools/testing/selftests/damon/sysfs_update_schemes_tried_regions_hang.py
new file mode 100644
index 000000000000..8c690ba1a573
--- /dev/null
+++ b/tools/testing/selftests/damon/sysfs_update_schemes_tried_regions_hang.py
@@ -0,0 +1,33 @@
+#!/usr/bin/env python3
+# SPDX-License-Identifier: GPL-2.0
+
+import subprocess
+import time
+
+import _damon_sysfs
+
+def main():
+ proc = subprocess.Popen(['sleep', '2'])
+ kdamonds = _damon_sysfs.Kdamonds([_damon_sysfs.Kdamond(
+ contexts=[_damon_sysfs.DamonCtx(
+ ops='vaddr',
+ targets=[_damon_sysfs.DamonTarget(pid=proc.pid)],
+ schemes=[_damon_sysfs.Damos(
+ access_pattern=_damon_sysfs.DamosAccessPattern(
+ nr_accesses=[200, 200]))] # schemes
+ )] # contexts
+ )]) # kdamonds
+
+ err = kdamonds.start()
+ if err != None:
+ print('kdmaond start failed: %s' % err)
+ exit(1)
+
+ while proc.poll() == None:
+ err = kdamonds.kdamonds[0].update_schemes_tried_bytes()
+ if err != None:
+ print('tried bytes update failed: %s' % err)
+ exit(1)
+
+if __name__ == '__main__':
+ main()