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

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commit 3479641796 ("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 <sj@kernel.org>
Cc: Shuah Khan <shuah@kernel.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>

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SeongJae Park 2024-02-07 12:31:32 -08:00 • committed by Andrew Morton

parent ce7a283465

commit e6255a2976

4 changed files with 97 additions and 0 deletions

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1

tools/testing/selftests/damon/.gitignore vendored

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tools/testing/selftests/damon/Makefile

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80

tools/testing/selftests/damon/debugfs_target_ids_read_before_terminate_race.c

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tools/testing/selftests/damon/debugfs_target_ids_read_before_terminate_race.sh

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