Kernel/linux-next
1
0
Fork 0
mirror of https://git.kernel.org/pub/scm/linux/kernel/git/next/linux-next.git synced 2025-01-08 15:04:45 +00:00
Code Issues Actions Packages Projects Releases Wiki Activity

selftests/damon: add a test for update_schemes_tried_regions hang bug

Browse Source 
Add a test for reproducing the update_schemes_tried_{regions,bytes}
command-causing indefinite hang bug that fixed by commit 7d6fa31a2f
("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>
This commit is contained in:
SeongJae Park 2023-12-12 19:48:10 +00:00 committed by Andrew Morton
parent b5906f5f73
commit e3898efaff
2 changed files with 34 additions and 0 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

1
tools/testing/selftests/damon/Makefile
View File

@ -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

33
tools/testing/selftests/damon/sysfs_update_schemes_tried_regions_hang.py Normal file
View File

@ -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()