[igt-dev] [RESUBMIT][PATCH v7 0/2] Add a new test for driver/device hot reload

[Janusz Krzysztofik]

(Resubmitting with patch versions in commit titles fixed as v7)

The test should help resolving driver bugs which exhibit themselves
when a device is unplugged / driver unbind from a device while the
device is busy (different from simple module unload which requires 
device references being put first).

Janusz Krzysztofik (2):
  tests: Add a new test for driver/device hot reload
  tests/core_hot_reload: Accept external workload

 tests/Makefile.sources  |   1 +
 tests/core_hot_reload.c | 305 ++++++++++++++++++++++++++++++++++++++++
 tests/meson.build       |   1 +
 3 files changed, 307 insertions(+)
 create mode 100644 tests/core_hot_reload.c


Last time (submission marked as v5) I tried to restore original
version numbering since initial internal submission and I failed,
sorry.  There was one more public submission I missed, that's why
we now have v7, not v6, sorry.

I've also rearranged v5->v6 description to better reflect ideas
standing behind, and credited authors of comments, requests and
suggestions I followed.
 

Changelog:
v6->v7:
- add missing igt_exit() needed with the second patch.

v5->v6 (third public submission, incorrectly marked as v5, sorry):
- run workload inside an igt helper subprocess so resources consumed
  by the workload are cleaned up automatically on workload subprocess
  crash, without affecting test results,
- move the igt helper with workload back from subtests to initial
  fixture so workload crash also does not affect test results,
- re-add the second patch which extends the test with an option for
  using an external command as a workload,
- other cleanups suggested by Kasia and Chris.

v4->v5 (second public submission, marked as v2):
- try to restore the device to a working state after each subtest
  (Petri, Daniel).

v3->v4 (first public submission, not marked with any version number):
- run dummy_workolad from inside subtests (Antonio).

v2->v3 (internal submission):
- run dummy_workload from the test process directly (Antonio),
- drop the patch for running external workload (Antonio).

v1->v2 (internal submission):
- run a subprocess with dummy_workload instead of external command
  (Antonio),
- keep use of external workload command as an option, move that to a
  separate patch.

-- 
2.20.1