This comes useful when using selftests from mainline on older kernels/setups that still rely on cgroup v1 while maintains single variant of selftests. The core tests that rely on v2 specific features are skipped, the remaining ones are adjusted to work with a v1 hierarchy.
The expected output on v1 system: ok 1 # SKIP test_cgcore_internal_process_constraint ok 2 # SKIP test_cgcore_top_down_constraint_enable ok 3 # SKIP test_cgcore_top_down_constraint_disable ok 4 # SKIP test_cgcore_no_internal_process_constraint_on_threads ok 5 # SKIP test_cgcore_parent_becomes_threaded ok 6 # SKIP test_cgcore_invalid_domain ok 7 # SKIP test_cgcore_populated ok 8 test_cgcore_proc_migration ok 9 test_cgcore_thread_migration ok 10 test_cgcore_destroy ok 11 test_cgcore_lesser_euid_open ok 12 # SKIP test_cgcore_lesser_ns_open
Michal Koutný (4): selftests: cgroup_util: Add helpers for testing named v1 hierarchies selftests: cgroup: Add support for named v1 hierarchies in test_core selftests: cgroup: Optionally set up v1 environment selftests: cgroup: Fix compilation on pre-cgroupns kernels
.../selftests/cgroup/lib/cgroup_util.c | 4 +- .../cgroup/lib/include/cgroup_util.h | 5 ++ tools/testing/selftests/cgroup/test_core.c | 84 ++++++++++++++++--- 3 files changed, 82 insertions(+), 11 deletions(-)
base-commit: 9afe652958c3ee88f24df1e4a97f298afce89407