[v6,0/2] tests/functional: add memlock tests

Message

Alexandr Moshkov April 17, 2025, 11:40 a.m. UTC

Add new tests to check the correctness of the `-overcommit memlock`
option (possible values: off, on, on-fault) by using
`/proc/{qemu_pid}/smaps` file to check in Size, Rss and Locked fields of
anonymous segments:

* if `memlock=off`, then Locked = 0 on every anonymous smaps;
* if `memlock=on`, then Size, Rss and Locked values must be equal for
every anon smaps where Rss is not 0;
* if `memlock=on-fault`, then Rss and Locked must be equal on every anon
smaps and anonymous segment with Rss < Size must exists.

---

v5 -> v6:
* add python3 shebang to tests/functional/test_memlock.py

v4 -> v5:
* refactor skipLockedMemoryTest decorator: using resource.getrlimit()
  function instead of spawning a process

v3 -> v4:
* add skipLockedMemoryTest decorator to skip test if system's locked
  memory limit is below the required threashold;
* add to MemlockTest skipLockedMemoryTest decorator with 2 GB limit.

v2 -> v3:
Move tests to tests/functional dir, as the tests/avocado dir is being phased out.
v2 was [PATCH v2] tests/avocado: add memlock tests.
Supersedes: <[e-mail]>

v1 -> v2:
In the previous send, i forgot to specify new patch version (v2)
So i resend previous patch with version specified.


Alexandr Moshkov (2):
  tests/functional: add skipLockedMemoryTest decorator
  tests/functional: add memlock tests

 tests/functional/meson.build             |   1 +
 tests/functional/qemu_test/__init__.py   |   2 +-
 tests/functional/qemu_test/decorators.py |  18 ++++
 tests/functional/test_memlock.py         | 104 +++++++++++++++++++++++
 4 files changed, 124 insertions(+), 1 deletion(-)
 create mode 100755 tests/functional/test_memlock.py