linux.git/tools/testing/selftests/damon, branch v6.9

selftests: damon: add access_memory to .gitignore

2024-03-05T01:01:16+00:00

This binary is missing in the .gitignore and stays as an untracked file.

Link: https://lore.kernel.org/r/20240214-damon_selftest_gitignore-v1-1-f517d0f9f783@gmail.com
Link: https://lkml.kernel.org/r/20240221211148.46522-3-sj@kernel.org
Signed-off-by: Javier Carrasco 
Singed-off-by: SeongJae Park 
Reported-by: Bernd Edlinger 
Closes: https://lore.kernel.org/all/AS8P193MB1285C963658008F1B2702AF7E4792@AS8P193MB1285.EURP193.PROD.OUTLOOK.COM/
Reviewed-by: SeongJae Park 
Cc: Vincenzo Mezzela 
Signed-off-by: Andrew Morton

selftest: damon: fix minor typos in test logs

2024-03-05T01:01:16+00:00

Patch series "selftests/damon: misc fixes".

Misc fixes for DAMON selftets on behalf of the original authors.


This patch (of 2):

This patch resolves a spelling error in the test log, preventing potential
confusion.

It is submitted as part of my application to the "Linux Kernel Bug Fixing
Spring Unpaid 2024" mentorship program of the Linux Foundation.

Link: https://lore.kernel.org/r/20240204122523.14160-1-vincenzo.mezzela@gmail.com
Link: https://lkml.kernel.org/r/20240221211148.46522-2-sj@kernel.org
Signed-off-by: Vincenzo Mezzela 
Signed-off-by: SeongJae Park 
Reviewed-by: SeongJae Park 
Cc: Bernd Edlinger 
Cc: Javier Carrasco 
Signed-off-by: Andrew Morton

selftests/damon/_chk_dependency: get debugfs mount point from /proc/mounts

2024-02-22T18:24:57+00:00

DAMON debugfs selftests dependency checker assumes debugfs would be
mounted at /sys/kernel/debug.  That would be ok for many cases, but some
systems might mounted the file system on some different places.  Parse the
real mount point using /proc/mounts file.

Link: https://lkml.kernel.org/r/20240207203134.69976-9-sj@kernel.org
Signed-off-by: SeongJae Park 
Cc: Shuah Khan 
Signed-off-by: Andrew Morton

selftests/damon: add a test for the pid leak of dbgfs_target_ids_write()

2024-02-22T18:24:56+00:00

Commit ebb3f994dd92 ("mm/damon/dbgfs: fix 'struct pid' leaks in
'dbgfs_target_ids_write()'") fixes a pid leak bug in DAMON debugfs
interface, namely dbgfs_target_ids_write() function.  Add a selftest for
the issue to prevent the problem from mistakenly recurring.

Link: https://lkml.kernel.org/r/20240207203134.69976-8-sj@kernel.org
Signed-off-by: SeongJae Park 
Cc: Shuah Khan 
Signed-off-by: Andrew Morton

selftests/damon: add a test for a race between target_ids_read() and dbgfs_before_terminate()

2024-02-22T18:24:56+00:00

commit 34796417964b ("mm/damon/dbgfs: protect targets destructions with
kdamond_lock") fixed a race of DAMON debugfs interface.  Specifically, the
race was happening between target_ids_read() and dbgfs_before_terminate().
Add a test for the issue to prevent the problem from accidentally
recurring.

Link: https://lkml.kernel.org/r/20240207203134.69976-7-sj@kernel.org
Signed-off-by: SeongJae Park 
Cc: Shuah Khan 
Signed-off-by: Andrew Morton

selftests/damon: add a test for DAMOS apply intervals

2024-02-22T18:24:56+00:00

Add a selftest for DAMOS apply intervals.  It runs two schemes having
different apply interval agains an artificial memory access workload, and
check if the scheme with smaller apply interval was applied more
frequently.

Link: https://lkml.kernel.org/r/20240207203134.69976-6-sj@kernel.org
Signed-off-by: SeongJae Park 
Cc: Shuah Khan 
Signed-off-by: Andrew Morton

selftests/damon: add a test for DAMOS quota

2024-02-22T18:24:56+00:00

Add a selftest for verifying the DAMOS quota feature.  The test is very
similar to sysfs_update_schemes_tried_regions_wss_estimation.py.  It
starts an artificial workload of 20 MiB working set, run DAMON to find the
working set size, but with 1 MiB/100 ms size quota.  Then, it collect the
DAMON-found working set size every 100 ms and check if the quota was
always applied as expected.  For the confirmation, the tests shows the
stat-applied region size and the qt_exceeds stat.

Link: https://lkml.kernel.org/r/20240207203134.69976-5-sj@kernel.org
Signed-off-by: SeongJae Park 
Cc: Shuah Khan 
Signed-off-by: Andrew Morton

selftests/damon/_damon_sysfs: support DAMOS apply interval

2024-02-22T18:24:56+00:00

Update the test-purpose DAMON sysfs control Python module to support DAMOS
apply interval.

Link: https://lkml.kernel.org/r/20240207203134.69976-4-sj@kernel.org
Signed-off-by: SeongJae Park 
Cc: Shuah Khan 
Signed-off-by: Andrew Morton

selftests/damon/_damon_sysfs: support DAMOS stats

2024-02-22T18:24:56+00:00

Update the test-purpose DAMON sysfs control Python module to support DAMOS
stats.

Link: https://lkml.kernel.org/r/20240207203134.69976-3-sj@kernel.org
Signed-off-by: SeongJae Park 
Cc: Shuah Khan 
Signed-off-by: Andrew Morton

selftests/damon/_damon_sysfs: support DAMOS quota

2024-02-22T18:24:56+00:00

Patch series "selftests/damon: add more tests for core functionalities and
corner cases".

Continue DAMON selftests' test coverage improvement works with a trivial
improvement of the test code itself.  The sequence of the patches in
patchset is as follows.

The first five patches add two DAMON core functionalities tests.  Those
begins with three patches (patches 1-3) that update the test-purpose DAMON
sysfs interface wrapper to support DAMOS quota, stats, and apply interval
features, respectively.  The fourth patch implements and adds a selftest
for DAMOS quota feature, using the DAMON sysfs interface wrapper's newly
added support of the quota and the stats feature.  The fifth patch further
implements and adds a selftest for DAMOS apply interval using the DAMON
sysfs interface wrapper's newly added support of the apply interval and
the stats feature.

Two patches (patches 6 and 7) for implementing and adding two corner cases
handling selftests follow.  Those try to avoid two previously fixed bugs
from recurring.

Finally, a patch for making DAMON debugfs selftests dependency checker to
use /proc/mounts instead of the hard-coded mount point assumption follows.


This patch (of 8):

Update the test-purpose DAMON sysfs control Python module to support DAMOS
quota.

Link: https://lkml.kernel.org/r/20240207203134.69976-1-sj@kernel.org
Link: https://lkml.kernel.org/r/20240207203134.69976-2-sj@kernel.org
Signed-off-by: SeongJae Park 
Cc: Shuah Khan 
Signed-off-by: Andrew Morton